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Sample records for department investigation radiation

  1. Radiation Protection and Safety Department - annual report 1977

    International Nuclear Information System (INIS)

    Kiefer, H.; Koelzer, W.

    1978-03-01

    The duties cover tasks relative to radiation protection and safety on behalf of the institutes and departments of Kernforschungszentrum Karlsruhe and environmental monitoring for the whole Nuclear Research Center as well as own research and development work, mainly performed under the Nuclear Research Center and the Nuclear Safeguards Project. The centers of interest of R and D activities were: investigation of the atmospheric diffusion in the micro- and meso-scale, study of the radiological consequences of accidents in reactors under probabilistic aspects, implementation of nuclear fuel safeguarding systems, improvements in radiation protection measurement technology. This report gives details of the different duties, indicates the results of 1977 routine measurements, and reports about new results of investigations and developments of the working groups of the department. (orig.) [de

  2. Radiation Research Department annual report 2002

    International Nuclear Information System (INIS)

    Majborn, B.; Damkjaer. A.; Nielsen, S.P.

    2003-06-01

    The report presents a summary of the work of the Radiation Research Department in 2002. The departments research and development activities are organized in two research programmes: 'Radiation Physics' and 'Radioecology and Tracer Studies'. In addition the department is responsible for the task 'Dosimetry'. Lists of publications, committee memberships and staff members are included. (au)

  3. Radiation Research Department annual report 2002

    Energy Technology Data Exchange (ETDEWEB)

    Majborn, B.; Damkjaer, A.; Nielsen, S.P. (eds.)

    2003-06-01

    The report presents a summary of the work of the Radiation Research Department in 2002. The departments research and development activities are organized in two research programmes: 'Radiation Physics' and 'Radioecology and Tracer Studies'. In addition the department is responsible for the task 'Dosimetry'. Lists of publications, committee memberships and staff members are included. (au)

  4. Overview. Department of Radiation and Environmental Biology. Section 7

    International Nuclear Information System (INIS)

    Cebulska-Wasilewska, A.

    1995-01-01

    The activities of the Department of Radiation and Environmental Biology in 1994 cover the following goals: application of fission neutrons to cancer therapy, studies on neutron efficiency to induce mutation and chromosomal damage, study on the formula for alteration of the repair process observed in case of gene mutation in TSH assay, investigation of new methods for more accurate measurements of molecular and cellular damage caused by radiation and environmental agents and studies on possible improvement in the application of different radiation sources to clinical cancer therapy. In this section of the Annual Report, the description of the mentioned activities as well as the information about personnel employed in the Department, papers and reports published in 1994, contribution to conferences and grants are also given

  5. Training program in radiation protection: implantation in a radiation oncology department

    International Nuclear Information System (INIS)

    Chretien, Mario; Morrier, Janelle; Cote, Carl; Lavallee, Marie C.

    2008-01-01

    Full text: Purpose: To introduce the radiation protection training program implemented in the radiation oncology department of the Hotel-Dieu de Quebec. This program seeks to provide an adequate training for all the clinic workers and to fulfill Canadian Nuclear Safety Commission's (CNSC) legislations. Materials and Methods: The radiation protection training program implemented is based on the use of five different education modalities: 1) Oral presentations, when the objective of the formation is to inform a large number of persons about general topics; 2) Periodic journals are published bimonthly and distributed to members of the department. They aim to answer frequently asked questions on the radiation safety domain. Each journal contains one main subject which is vulgarized and short notices, these later added to inform the readers about the departmental news and developments in radiation safety; 3) Electronic self-training presentations are divided into several units. Topics, durations, complexity and evaluations are adapted for different worker groups; 4) Posters are strategically displayed in the department in order to be read by all the radiation oncology employees, even those who are not specialized in the radiation protection area; 5) Simulations are organized for specialised workers to practice and to develop their skills in radiation protection situations as emergencies. A registration method was developed to record all training performed by each member of the department. Results: The training program implemented follows the CNSC recommendations. It allows about 150 members of the department to receive proper radiation safety training. The oral presentations allow an interaction between the trainer and the workers. The periodic journals are simple to write while ensuring continuous training. They are also easy to read and to understand. The e-learning units and their associated evaluations can be done at any time and everywhere in the department. The

  6. Investigations of actual conditions of medical radiation technologists

    International Nuclear Information System (INIS)

    2002-01-01

    At 50 year after enactment of the law of medical radiation technologists, their actual conditions were investigated. The investigation was done in December 2001 by questionnaire to directors of 10,514 facilities and answers were obtained from 4,241 facilities (40.37%). Following 11 questions (major answers and their analysis in parenthesis) were made: Nature of the facility (Private hospitals 45.8%, public ones 20.8%); State of radiation department (Independent department of the technologists from medical one about 30%); Actual job of the technologists (X-ray about 81% of the facilities, angiography 34%, CT 78%, MRI 38% where 94% of technologists conduct, nuclear medicine 17%, ultrasound 51% where, 10%); Personnel of the radiation department (21,897 persons in total/male 85%); Fulfillment of the personnel number; Treatment of the personnel; Acknowledgement system of the Technologist Society; Management of radiation instruments like daily examination; Radiation control (Leak dose measurement by technologists by themselves about 50% facilities for X-ray and radio-therapy); Medical exposure (Measurement experience about 50%); and Possession of dose rate-meter/survey-meter (Possession in about 40% facilities). (N.I.)

  7. Investigations of actual conditions of medical radiation technologists

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-12-01

    At 50 year after enactment of the law of medical radiation technologists, their actual conditions were investigated. The investigation was done in December 2001 by questionnaire to directors of 10,514 facilities and answers were obtained from 4,241 facilities (40.37%). Following 11 questions (major answers and their analysis in parenthesis) were made: Nature of the facility (Private hospitals 45.8%, public ones 20.8%); State of radiation department (Independent department of the technologists from medical one about 30%); Actual job of the technologists (X-ray about 81% of the facilities, angiography 34%, CT 78%, MRI 38% where 94% of technologists conduct, nuclear medicine 17%, ultrasound 51% where, 10%); Personnel of the radiation department (21,897 persons in total/male 85%); Fulfillment of the personnel number; Treatment of the personnel; Acknowledgement system of the Technologist Society; Management of radiation instruments like daily examination; Radiation control (Leak dose measurement by technologists by themselves about 50% facilities for X-ray and radio-therapy); Medical exposure (Measurement experience about 50%); and Possession of dose rate-meter/survey-meter (Possession in about 40% facilities). (N.I.)

  8. Radiation doses to the staff of a nuclear cardiology department

    International Nuclear Information System (INIS)

    Tsapaki, V.; Koutelou, M.; Theodorakos, A.; Kouzoumi, A.; Kitziri, S.; Tsiblouli, S.; Vardalaki, E.; Kyrozi, E.; Kouttou, S.

    2002-01-01

    The last years, new radiopharmaceuticals are used in a Nuclear Medicine (NM) Department. Nowadays, Single Photon Emission Computed Tomography (SPECT) is a method of routine imaging, a fact that has required increased levels of radioactivity in certain patient examinations. The staff that is more likely to receive the greatest radiation dose in a NM Department is the technologist who deals with performance of patient examination and injection of radioactive material and the nurse who is caring for the patients visiting the Department some of which being totally helpless. The fact that each NM Dept possesses equipment with certain specifications, deals with various kind of patients, has specific design and radiation protection measures which can differ from other NM Depts and uses various examination protocols, makes essential the need to investigate the radiation doses received by each member of the staff, so as to continuously monitor doses and take protective measures if required, control less experienced staff and ensure that radiation dose levels are kept as low as possible at all times. The purpose of the current study was to evaluate radiation dose to the nuclear cardiology department staff by thermoluminescent dosemeters (TLDs) placed on the the skin at thyroid and abdominal region as well as evaluating protection measures taken currently in the Dept

  9. HMI Radiation Chemistry Department. Scientific report 1985

    International Nuclear Information System (INIS)

    1985-01-01

    Results of the R and D activities of the Radiation Chemistry Department, Hahn-Meitner-Institut, are reported, primarily dealing with the following subjects: a) Interface processes and energy conversion; b) Pulsed radiolysis and kinematics; c) Insulating materials and polymers. Activities belonging to group (a) above include the development of photosensitive materials for energy conversion, photovoltaic solar cells, light-induced hydrogen liberation, and inclusion reactions, model experiments studying photoactive interfaces, rapid kinematic measurements at interfaces after laser-induced excitation, surface preparation of amorphous silicon and its effects on electronic properties, photochemical reactions and catalysts. Work performed in group (b) above included studies into various chemical reactions involving radicals, and on interactions between atoms, ions, molecules and molecular clusters induced by low-energy collisions. Group (c) above all performed studies into the physical and chemical elementary processes induced by high-energy radiation, light and UV light, especially in electronegative gases. Further activities in this group included photochemical and radiation chemical investigations on polymers. The report lists publications and lectures prepared by H.M.I. members and guest scientists in the year 1985. (RB) [de

  10. Growth of the Female Professional in the Radiation Safety Department

    International Nuclear Information System (INIS)

    Yoon, J.

    2015-01-01

    Currently in Korea’s Nuclear Power Plants (KHNP), the number of the female staffs has been increased as planned construction of new NPPs. However the role of the female staffs in NPPs is still limited as before. Because there is the prejudice which the operating and the maintenance work is unsuitable for female owing to the risk of the radiation exposure and the physical weakness. So female staffs mostly belong to the supporting departments. In particular, the proportion of the female staffs is significantly higher in the radiation safety department among those. The ratio is 15% and is twice higher, whereas the total percentage of the female workers in KHNP is 8%. In the past, the women staffs in the radiation safety department were usually charge of the non-technical duties like the radiation exposure dose management and the education for radiation workers. Although the ratio of the women about that is still higher, nowadays, the role of the female workers tends to diversify to technical supports like the radiation protection and the radioactive waste management while increased the proportion of female employees. This trend is expected to continue for many years to come. Thus, in Korea’s NPPs, it is expected that many women will demonstrate their professionalism especially in the radiation safety department than any other departments. This presentation contains the detailed duty and trend about female staffs in the radiation safety department in Korea’s NPPs. (author)

  11. Department of Radiation Detectors: Overview

    International Nuclear Information System (INIS)

    Piekoszewski, J.

    1998-01-01

    (full text) Work carried out in 1997 in the Department of Radiation Detectors concentrated on three subjects: (i) Semiconductor Detectors (ii) X-ray Tube Generators (iii) Material Modification using Ion and Plasma Beams. Semiconductor detectors: Semiconductor detectors of ionizing radiation are among the basic tools utilized in such fields of research and industry as nuclear physics, high energy physics, medical (oncology) radiotherapy, radiological protection, environmental monitoring, energy dispersive X-ray fluorescence non-destructive analysis of chemical composition, nuclear power industry. The Department all objectives are: - search for new types of detectors, - adapting modern technologies (especially of industrial microelectronics) to detector manufacturing, - producing unique detectors tailored for physics experiments, - manufacturing standard detectors for radiation measuring instruments, - scientific development of the staff. These 1997 objectives were accomplished particularly by: - research on unique detectors for nuclear physics (e.g. transmission type Si(Li) detectors with extremely thin entrance and exit window), - development of technology of high-resistivity (HRSi) silicon detectors and thermoelectric cooling systems (KBN grant), - study of the applicability of industrial planar technology in producing detectors, - manufacturing detectors developed in previous years, re-generating and servicing customer detectors of various origin. In accomplishing of the above, the Department cooperated with interested groups of physicists from our Institute (P-I and P-II Departments), Warsaw University, Warsaw Heavy Ion Laboratory and with some technology Institutes based in Warsaw (ITME, ITE). Some detectors and services have been delivered to customers on a commercial basis. X-Rat tube generators: The Department conducts research on design and technology of producing X-ray generators based on X-ray tubes of special construction. In 1997, work on a special

  12. Radiation Research Department annual report 2003

    DEFF Research Database (Denmark)

    Majborn, Benny; Damkjær, A.; Nielsen, Sven Poul

    2004-01-01

    This report presents a summary of the work of the Radiation Research Department in 2003. The main research areas were dosimetry, nuclear emergency preparedness, radioecology, and radioanalytical techniques. List of publications, committee memberships andstaff members are included....

  13. Radiation Research Department annual report 2003

    Energy Technology Data Exchange (ETDEWEB)

    Majborn, B.; Damkjaer, A.; Nielsen, S.P. (eds.)

    2004-06-01

    This report presents a summary of the work of the Radiation Research Department in 2003. The main research areas were dosimetry, nuclear emergency preparedness, radioecology, and radioanalytical techniques. Lists of publications, committee memberships and staff members are included. (au)

  14. Department of Radiation Detectors: Overview

    International Nuclear Information System (INIS)

    Piekoszewski, J.

    1999-01-01

    Full text: Work carried out in 1998 in the Department of Radiation Detectors concentrated on three subjects: (i) Semiconductor Detectors (ii) X-ray Tube Generators (iii) Material Modification Using Ion and Plasma Beams. SEMICONDUCTOR DETECTORS: Semiconductor detectors of ionizing radiation are among the basic tools utilized in such fields of research and industry as nuclear physics, high energy physics, medical (oncology) radiotherapy, radiological protection, environmental monitoring, energy dispersive X-ray fluorescence non-destructive analysis of chemical composition, nuclear power industry. The departmental objectives are: a search for new types of detectors; producing unique detectors tailored for physics experiments; manufacturing standard detectors for radiation measuring instruments; scientific development of the staff. These objectives were accomplished in 1998 particularly by: research on unique thin silicon detectors for identification of particles in E-ΔE telescopes, modernization of technology of manufacturing Ge(Li) detectors capable of detecting broader range of gamma energies, manufacturing detectors developed in previous years, re-generating and servicing customer detectors of various origin. In accomplishment of the above the Department co-operated with groups of physicists from IPJ, PAN Institute of Physics (Warsaw), and with some technology Institutes based in Warsaw (ITME, ITE). Some detectors and services have been delivered to customers on a commercial basis. X-Ray TUBE GENERATORS: The Department conducts research on design and technology of manufacturing X-ray generators as well as on imaging and dosimetry of X-ray beams. Various models of special construction X-ray tubes and their power supplies are under construction. In 1998 work concentrated on: completing laboratory equipment for manufacturing X-ray tubes and their components, developing technology of manufacturing X-ray tubes and their components, completing a laboratory set-up with

  15. HMI Department of Radiation Chemistry: Results of scientific activities in 1984

    International Nuclear Information System (INIS)

    1985-01-01

    In the radiation chemistry department of the Hahn-Meitner-Institute in Berlin, 4 subjects are treated largely the progress of which made in 1984 is herein reported: 1) Interface processes and energy conversion (reaction pathways of photoinduced charge carriers and their in energy conversion mechanisms); 2) Pulse radiolysis (generation and investigation of shortlived chemically quick-reacting particles); 3) Kinematics (reciprocal action with ion, atom and molecule collisions; clarification of the dynamics of chemical reactions; 4) Insulators and plastics/physical and chemical primary processes when these materials are subjected to high-energy radiation, light or UV light). A list of publications and lectures is added to complement the description of results gained from R and D work. (BR) [de

  16. Department of Radiation Detectors - Overview

    International Nuclear Information System (INIS)

    Piekoszewski, J.

    1997-01-01

    Work carried out in 1996 in the Department of Radiation Detectors concentrated on three subjects: (i) Semiconductor Detectors (ii) X-ray Tube Generators (iii) Material Modification Using Ion and Plasma Beams. The Departamental objectives are: a search for new types of detectors, adapting modern technologies (especially of industrial microelectronics) to detector manufacturing, producing unique detectors tailored for physics experiments, manufacturing standard detectors for radiation measuring instruments. These objectives were accomplished in 1996 by: research on unique detectors for nuclear physics (e.g. a spherical set of particle detectors silicon ball), detectors for particle identification), development of technology of high-resistivity silicon detectors HRSi (grant proposal), development of thermoelectric cooling systems (grant proposal), research on p-i-n photodiode-based personal dosimeters, study of applicability of industrial planar technology in producing detectors, manufacturing detectors developed in previous years, re-generating and servicing customer detectors of various origin. The Department conducts research on the design and technology involved in producing X-ray generators based on X-ray tubes of special construction. Various tube models and their power supplies were developed. Some work has also been devoted to the detection and dosimetry of X-rays. X-ray tube generators are applied to non-destructive testing and are components of analytical systems such as: X-ray fluorescence chemical composition analysis, gauges of layer thickness and composition stress measurements, on-line control of processes, others where an X-ray tube may replace a radio-isotope source. In 1996, the Department: reviewed the domestic demand for X-ray generators, developed an X-ray generator for diagnosis of ostheroporosis of human limbs, prepared a grant proposal for the development of a new instrument for radiotherapy, the so-called needle-like X-ray tube. (author)

  17. Department of Radiation Detectors - Overview

    Energy Technology Data Exchange (ETDEWEB)

    Piekoszewski, J. [Soltan Inst. for Nuclear Studies, Otwock-Swierk (Poland)

    1997-12-31

    Work carried out in 1996 in the Department of Radiation Detectors concentrated on three subjects: (i) Semiconductor Detectors (ii) X-ray Tube Generators (iii) Material Modification Using Ion and Plasma Beams. The Departamental objectives are: a search for new types of detectors, adapting modern technologies (especially of industrial microelectronics) to detector manufacturing, producing unique detectors tailored for physics experiments, manufacturing standard detectors for radiation measuring instruments. These objectives were accomplished in 1996 by: research on unique detectors for nuclear physics (e.g. a spherical set of particle detectors silicon ball), detectors for particle identification), development of technology of high-resistivity silicon detectors HRSi (grant proposal), development of thermoelectric cooling systems (grant proposal), research on p-i-n photodiode-based personal dosimeters, study of applicability of industrial planar technology in producing detectors, manufacturing detectors developed in previous years, re-generating and servicing customer detectors of various origin. The Department conducts research on the design and technology involved in producing X-ray generators based on X-ray tubes of special construction. Various tube models and their power supplies were developed. Some work has also been devoted to the detection and dosimetry of X-rays. X-ray tube generators are applied to non-destructive testing and are components of analytical systems such as: X-ray fluorescence chemical composition analysis, gauges of layer thickness and composition stress measurements, on-line control of processes, others where an X-ray tube may replace a radio-isotope source. In 1996, the Department: reviewed the domestic demand for X-ray generators, developed an X-ray generator for diagnosis of ostheroporosis of human limbs, prepared a grant proposal for the development of a new instrument for radiotherapy, the so-called needle-like X-ray tube. (author).

  18. 1988 annual work report of the Department for Safety and Radiation Protection

    International Nuclear Information System (INIS)

    Hille, R.

    1989-03-01

    The Department for Safety and Radiation Protection continues to be responsible for coordinating radiation protection, safety and protection at the KFA. It supports the other institutes and departments in performing the safety tasks allotted to them. The principal tasks of the Department are in administrative and technical assistance to these organization units and in safeguards. Administrative assistance involves, for example, regulation of the radiation protection organization in the institutes, including the appointment of radiation protection officers (Strahlenschutzbeauftragte). Furthermore, this includes the central handling of the registration system with the authorities and dealing with outside firms thus considerably relieving the institutes of their administrative tasks. Handling licensing procedures and the central accountancy of radioactive materials is also to be mentioned in this context. Technical assistance largely consists of developing, maintaining and repairing radiation measuring instruments and in the monitoring of personnel by evaluating personnel dosimeters and incorporation controls for radioactive sources. The safeguards tasks of the Department concern the very staff-intensive physical protection, as well as environmental protection and industrial safety. (orig.) [de

  19. Importance of establishing radiation protection culture in Radiology Department.

    Science.gov (United States)

    Ploussi, Agapi; Efstathopoulos, Efstathios P

    2016-02-28

    The increased use of ionization radiation for diagnostic and therapeutic purposes, the rapid advances in computed tomography as well as the high radiation doses delivered by interventional procedures have raised serious safety and health concerns for both patients and medical staff and have necessitated the establishment of a radiation protection culture (RPC) in every Radiology Department. RPC is a newly introduced concept. The term culture describes the combination of attitudes, beliefs, practices and rules among the professionals, staff and patients regarding to radiation protection. Most of the time, the challenge is to improve rather than to build a RPC. The establishment of a RPC requires continuing education of the staff and professional, effective communication among stakeholders of all levels and implementation of quality assurance programs. The RPC creation is being driven from the highest level. Leadership, professionals and associate societies are recognized to play a vital role in the embedding and promotion of RPC in a Medical Unit. The establishment of a RPC enables the reduction of the radiation dose, enhances radiation risk awareness, minimizes unsafe practices, and improves the quality of a radiation protection program. The purpose of this review paper is to describe the role and highlight the importance of establishing a strong RPC in Radiology Departments with an emphasis on promoting RPC in the Interventional Radiology environment.

  20. Ionizing radiation hazards and its protection in a radiodiagnostic department

    International Nuclear Information System (INIS)

    Sinha, R.P.; Rai, S.D.

    1977-01-01

    After mentioning the contribution to gonadal dose from natural background and man-made radiation sources including those used in medical radiology, methods for minimising the radiation dose to the patients and staff in x-ray diagnostic department are discussed in brief. (M.G.B.)

  1. Evaluation of radiation protection in x rays room design in diagnostic radiography department in Omdurman locality

    International Nuclear Information System (INIS)

    Adam, Ahmed yusif Abdelrahman

    2013-03-01

    The purpose of this study is conducted in order to evaluate the application of radiation protection in x-ray rooms design in diagnosis radiology department, evaluate personal monitoring devices, to assess primary scatter and leakage radiation dose, to assess monitoring devices if available, in period from March 2013 to August 2013. The design data included room size, control room size, manufacture of equipment, room surrounding areas, workload of all equipment rooms, type of x-ray equipment, radiation worker's in all hospital, number of patient in each shift, structural material and shielding, K vp and m As used in x-ray room department during examination testing. The results of this study show that there is x-ray room design, the design of x-ray equipment is accepted according to the radiation safety institute team of quality control. Also the study shows that the radiation protection devices are available and in a good condition and enough in number. The study shows that there are not personal monitoring devices and services. the radiological technologist are well trained. Also the study investigation the radiation protection in x-ray room in diagnostic department in Omdurman locality. Finally the study shows that there is compact able to ICRP recommended and National quality control in Sudan Atomic Energy Council exception, Alwedad, Abusied and Blue Nile there are have not control room concludes that there is only in relationship hospital have a window without shield.(Author)

  2. 1989 annual work report of the KFA Department for Safety and Radiation Protection

    International Nuclear Information System (INIS)

    Hille, R.; Frenkler, K.L.

    1990-03-01

    The Department for Safety and Radiation Protection continues to be responsible for coordinating radiation protection, safety and protection at the KFA. It supports the other institutes and departments in performing the safety tasks allotted to them. The principal tasks of the Department are in administrative and technical assistance to these organization units and in safeguards. Administrative assistance involves, for example, regulation of the radiation protection organization in the institutes, including the appointment of radiation protection officers (Strahlenschutzbeauftrage). Furthermore, this includes the central handling of the registration system with the authorities and dealing with outside firms thus considerably relieving the institutes of their administrative tasks. Handling licensing procedures and the central accountancy of radioactive materials is also to be mentioned in this context. Technical assistance largely consists of developing, maintaining and repairing radiation measuring instruments and in the monitoring of personnel by evaluating personnel dosimeters and incorporation controls for radioactive sources. The safeguards tasks of the Department concern the very staff-intensive physical protection, as well as environmental protection and industrial safety. (orig.) [de

  3. The radiation dose to accompanying nurses, relatives and other patients in a nuclear medicine department waiting room

    Energy Technology Data Exchange (ETDEWEB)

    Harding, L K; Harding, N J; Warren, H; Mills, A; Thomson, W H [Dudley Road Hospital, Birmingham (UK)

    1990-01-01

    The radiation dose to accompanying nurses, relatives and other patients in a nuclear medicine department waiting room was assessed at 5 min intervals by observing the seating arrangement. The total radiation dose to each person was calculated, using fixed values of dose rate per 100 MBq activity for radionuclides, and applying the inverse square law. Radioactive decay and attenuation effects due to intervening persons were also taken into account. The median radiation doses to accompanying nurses, relatives and other patients were 2.3, 2.0 and 0.2 {mu}Sv with maximum values of 17, 33 and 5 {mu}Sv respectively. In all cases, the radiation dose received by patients was less than 0.2% of the radiation dose resulting from their own investigation. Also, the maximum radiation dose received by an accompanying norse or friend was less than 1% of their appropriate annual dose limit. Similar values were obtained with calculations based on a 15 min time interval. The radiation doses received by those in a nuclear medicine department waiting room are small, and separate waiting room facilities for radioactive patients are unnecessary. (author).

  4. Radiation protection in radionuclide investigations

    International Nuclear Information System (INIS)

    Taylor, D.M.

    1985-01-01

    The subject is covered in sections: introduction; radiation and radioactivity; alpha particles; beta particles; neutrons; electromagnetic radiation; units of radioactivity and radiation; biological effects of radiation; the philosophy of radiation protection (ALARA principle); practical aspects of radiation protection; work with unsealed radiation sources; radionuclide studies in experimental animals; radiation safety during clinical investigations; legislative control of radiation work; radioactive waste disposal; emergency procedures; conclusion. (U.K.)

  5. Results of the evaluation of the radiation protection in several nuclear medicine departments and recommendations for its optimization

    International Nuclear Information System (INIS)

    Bejerano, Gladys Lopez; Jova Sed, Luis; Diaz, Efren; jova@cphr.edu.cu

    2001-01-01

    For the evaluation of the radiological safety in several Nuclear Medicine departments a survey was processed and applied that gathers the related mainly to: aspect of the licensing and fulfillment of the establish in this, the program of individual radiologic monitoring and his evaluation, functions that serve to the radiologic protection system, program of qualification and training of the personnel, equipment and mean of radiation protection, program of monitoring of the area of work, characteristic of the premises, management of remainder radioactive, program of quality control, aspect related to the radiation protection in the procedure of diagnosis with the investigation; as well as to pregnant patients and those related to the investigation to accidental medical exhibitions. In the work a systematization of the main results had been done, insisting on the evaluation of the doses received by the workers occupational exposed. A comparison of the activities administered to the patients by different departments and the internationally recommended ones, explaining the found differences. In addition the main recommendations were exposed to obtain in these departments an optimization of the radiological safety

  6. Experience of wireless local area network in a radiation oncology department.

    Science.gov (United States)

    Mandal, Abhijit; Asthana, Anupam Kumar; Aggarwal, Lalit Mohan

    2010-01-01

    The aim of this work is to develop a wireless local area network (LAN) between different types of users (Radiation Oncologists, Radiological Physicists, Radiation Technologists, etc) for efficient patient data management and to made easy the availability of information (chair side) to improve the quality of patient care in Radiation Oncology department. We have used mobile workstations (Laptops) and stationary workstations, all equipped with wireless-fidelity (Wi-Fi) access. Wireless standard 802.11g (as recommended by Institute of Electrical and Electronic Engineers (IEEE, Piscataway, NJ) has been used. The wireless networking was configured with the Service Set Identifier (SSID), Media Access Control (MAC) address filtering, and Wired Equivalent Privacy (WEP) network securities. We are successfully using this wireless network in sharing the indigenously developed patient information management software. The proper selection of the hardware and the software combined with a secure wireless LAN setup will lead to a more efficient and productive radiation oncology department.

  7. Impact of Quality Assurance Rounds in a Canadian Radiation Therapy Department

    International Nuclear Information System (INIS)

    Lefresne, Shilo; Olivotto, Ivo A.; Joe, Howard; Blood, Paul A.; Olson, Robert A.

    2013-01-01

    Purpose: Quality assurance (QA) programs aim to identify inconsistencies that may compromise patient care. Radiation treatment planning is a well-documented source of variation in radiation oncology, leading many organizations to recommend the implementation of QA rounds in which radiation therapy plans are peer reviewed. This study evaluates the outcome of QA rounds that have been conducted by a radiation therapy department since 2004. Methods and Materials: Prospectively documented records of QA rounds, from 2004 to 2010, were obtained. During rounds, randomly selected radiation therapy plans were peer reviewed and assigned a grade of A (adequate), B (minor suggestions of change to a plan for a future patient), or C (significant change required before the next fraction). The proportion of plans that received each recommendation was calculated, and the relationship between recommendations for each plan, tumor site, and mean years of experience of the radiation oncologist (RO) were explored. Chart reviews were performed for each plan that received a C. Results: During the study period, 1247 plans were evaluated; 6% received a B and 1% received a C. The mean RO years of experience were lower for plans graded C versus those graded A (P=.02). The tumor sites with the highest proportion of plans graded B or C were gastrointestinal (14%), lung (13%), and lymphoma (8%). The most common reasons for plans to receive a grade of C were inadequate target volume coverage (36%), suboptimal dose or fractionation (27%), errors in patient setup (27%), and overtreatment of normal tissue (9%). Conclusions: This study demonstrated that QA rounds are feasible and an important element of a radiation therapy department's QA program. Through peer review, plans that deviate from a department's expected standard can be identified and corrected. Additional benefits include identifying patterns of practice that may contribute to inconsistencies in treatment planning and the continuing

  8. Ceiling art in a radiation therapy department: its effect on patient treatment experience

    International Nuclear Information System (INIS)

    Bonett, Jotham

    2015-01-01

    A new initiative has been implemented at the Sunshine Hospital Radiation Therapy Centre, to provide a calming and comforting environment for patients attending radiation therapy treatment. As part of this initiative, the department's computed tomography (CT) room and radiation therapy bunkers were designed to incorporate ceiling art that replicates a number of different visual scenes. The study was undertaken to determine if ceiling art in the radiation therapy treatment CT and treatment bunkers had an effect on a patient's experience during treatment at the department. Additionally, the study aimed to identify which of the visuals in the ceiling art were most preferred by patients. Patients were requested to complete a 12-question survey. The survey solicited a patient's opinion/perception on the unit's unique ceiling display with emphasis on aesthetic appeal, patient treatment experience and the patient's engagement due to the ceiling display. The responses were dichotomised to ‘positive’ or ‘negative’. Every sixth patient who completed the survey was invited to have a general face-to-face discussion to provide further information about their thoughts on the displays. The results demonstrate that the ceiling artwork solicited a positive reaction in 89.8% of patients surveyed. This score indicates that ceiling artwork contributed positively to patients’ experiences during radiation therapy treatment. The study suggests that ceiling artwork in the department has a positive effect on patient experience during their radiation therapy treatment at the department

  9. Ceiling art in a radiation therapy department: its effect on patient treatment experience

    Energy Technology Data Exchange (ETDEWEB)

    Bonett, Jotham [Sunshine Hospital Radiation Therapy Centre, Melbourne, Vic. (Australia)

    2015-09-15

    A new initiative has been implemented at the Sunshine Hospital Radiation Therapy Centre, to provide a calming and comforting environment for patients attending radiation therapy treatment. As part of this initiative, the department's computed tomography (CT) room and radiation therapy bunkers were designed to incorporate ceiling art that replicates a number of different visual scenes. The study was undertaken to determine if ceiling art in the radiation therapy treatment CT and treatment bunkers had an effect on a patient's experience during treatment at the department. Additionally, the study aimed to identify which of the visuals in the ceiling art were most preferred by patients. Patients were requested to complete a 12-question survey. The survey solicited a patient's opinion/perception on the unit's unique ceiling display with emphasis on aesthetic appeal, patient treatment experience and the patient's engagement due to the ceiling display. The responses were dichotomised to ‘positive’ or ‘negative’. Every sixth patient who completed the survey was invited to have a general face-to-face discussion to provide further information about their thoughts on the displays. The results demonstrate that the ceiling artwork solicited a positive reaction in 89.8% of patients surveyed. This score indicates that ceiling artwork contributed positively to patients’ experiences during radiation therapy treatment. The study suggests that ceiling artwork in the department has a positive effect on patient experience during their radiation therapy treatment at the department.

  10. Evaluation of radiation protection in some nuclear medicine department

    International Nuclear Information System (INIS)

    Abdelrahim, Yassir Mohammed

    2015-12-01

    This study was carryout to evaluate the radiation protection in nuclear medicine department in Sudan, accordance with the standards international recommendation and code of practice for radiation protection in nuclear medicine, the evaluation was done for three nuclear medicine departments, included direct measurement of dose rate and the contamination level in some areas, were radiation sources, radiation workers and public are involved. The data was collected and analyzed from the results for three nuclear medicine departments that the average reading of ambient dose rate in : outside the door of imaging room (SPECT) 0.18μSv/h in hospital (1)& and 0.19μSv/h in hospital(2) and 0.19μSv/h hospital(3), inside control of imaging room (SPECT) 27.8μSv/h in hospital(1)& 0.14μSv/h in hospital(2)& 14μSv/h in hospital(3), inside the injection room 28.81μSv/h in hospital(1), 0.36μSv/h in hpspital(2), 0.06μSv/h in hospital(3) outside the door of lap, 0.65μSv/h in hospital(1), 0.13μSv/h in hospital(2) & 0.12μSv/h in hospital(3), inside the hot lap, 9.68μSv/h in hospital(1) & 0.30μSv/h in hospital(2) & 0.85 μSv/h in hospital(3), in outsidee the door of waiting room of injected patient 1.41μSv/h in hospital(1)& 0.16μSv/h in hospital(2) & 1.08μSv/h in hospital(3). Avaerge reading of contamination in: Floor of hot lap 44.50 B/cm"2 hospital(1) & 4.42B/cm"2in hospital(2) & 6.22 B/cm"2 in hospital (3) . on the bench tap 186.30 B/cm"2 hospital(1), 19.91 B/cm"2 in hospital(2) & 8.77B/cm"2 in hospital(3) floor of injection room 12.60 B/cm"2 in hospital(1) & 11.70 B/cm"2 in hospital(2) & 13.73 B/cm"2 hospital(3) & table of injection room 13.00 B/cm"2 in hospital(1)& 11.70 B/cm"2in hospital(2)& 13.73 B/cm"2 in hospital & tble of injection room 13.00 B/cm"2 in hospital(1) & 20.40 B/cm"2 in hospital(2) & 23.23 B/cm"2 B/cm"2 in hospital(3) on the shield of working surface 144.30 B/cm in hospital(1)& 47.00 B/cm"2 in hospital(2) & 52.33 B/cm"2 in hospital(3) , and makes check

  11. Risk of cataract among medical staff in neurosurgical department occupationally exposed to radiation

    International Nuclear Information System (INIS)

    Stankova-Mileva, I.; Vassileva, J.; Djounova, J.

    2012-01-01

    In this study we present the risk of cataract among medical staff in neurosurgical department occupationally exposed to radiation compared to those of non-radiation workers. Cataract is the most common degenerative opacity of the crystalline lens developing with aging. Other risk factors for cataract are: infrared and ultraviolet radiation, systemic diseases (diabetes, hypertonic disease), eye diseases (glaucoma, high myopia), drugs (steroids), etc. High risk of developing cataract we find among staff occupationally exposed to radiation during operations - interventional cardiologists and neurosurgeons. This study includes 30 people between 33 and 60 years of age working in neurosurgical department and control group (the same amount and age of people not exposed to radiation in their work). After visual acuity measurement, the lens was examined by retroillumination method (red reflex) and using a bio microscope. The patients were asked for presence of ocular and systemic diseases, eye trauma, drug, alcohol and tobacco abuse and for how many years they work in this department. There was one case with cataract among neurosurgeons. The doctor doesn't have eye or systemic diseases, doesn't take any drugs and is not alcohol or tobacco abuser. In the control group there were two persons with subcapsular cataract but they have diabetes. Radiation is one of the risk factors for cataract. Continuing of this epidemiological survey will provide further knowledge on the potential risk of occupational radiation-induced cataract among neurosurgical staff and will contribute for optimization of radiation protection. (authors)

  12. Investigation of radiation safety and safety culture of medical sanitation vocation in Suzhou

    International Nuclear Information System (INIS)

    Tang Bo; Tu Yu; Zhang Yin

    2009-01-01

    Objective: To investigate the construction of radiation safety and safety culture of medical sanitation vocation in Suzhou. Methods: All medical units registered in administration center of Suzhou were included. The above selected medical units were completely investigated, district and county under the same condition of quality control. Results: The radiation safety and safety culture are existing differences among different property and grade hospitals of medicai sanitation vocation in Suzhou. Conclusion: The construction of radiation safety and safety culture is generally occupying in good level in suhzou, but there are obvious differences among different property and grade hospitals. The main reason for the differences in the importance attached to by the hospital decision-making and department management officials as well as the staff personal. (authors)

  13. The Radiation Hygiene Department's activity in period of 1980-1994

    International Nuclear Information System (INIS)

    Bahnarel, I.

    2009-01-01

    The paper analyzes 15 years activity of the Radiation Hygiene Department of the National Scientific-Practical Centre of Preventive Medicine, Republic of Moldova: historical aspect, personnel management, equipment, international cooperation, projects, advances and problems

  14. Overview. Department of Environmental and Radiation Transport Physics. Section 6

    Energy Technology Data Exchange (ETDEWEB)

    Loskiewicz, J. [Institute of Nuclear Physics, Cracow (Poland)

    1995-12-31

    Research activities in the Department of Environmental and Radiation Transport Physics are carried out by three Laboratories: Laboratory of Environmental Physics, Laboratory of Neutron Transport Physics and Laboratory of Physics and Modeling of Radiation Transport. The researches provided in 1994 cover: tracer transport and flows in porous media, studies on pollution in atmospheric air, physics of molecular phenomena in chromatographic detectors, studies on neutron transport in heterogenous media, studies on evaluation of neutron cross-section in the thermal region, studies on theory and utilization of neural network in data evaluation, numerical modelling of particle cascades for particle accelerator shielding purpose. In this section the description of mentioned activities as well as the information about personnel employed in the Department, papers and reports published in 1994, contribution to conferences and grants is also given.

  15. Overview. Department of Environmental and Radiation Transport Physics. Section 6

    Energy Technology Data Exchange (ETDEWEB)

    Loskiewicz, J [Institute of Nuclear Physics, Cracow (Poland)

    1996-12-31

    Research activities in the Department of Environmental and Radiation Transport Physics are carried out by three Laboratories: Laboratory of Environmental Physics, Laboratory of Neutron Transport Physics and Laboratory of Physics and Modeling of Radiation Transport. The researches provided in 1994 cover: tracer transport and flows in porous media, studies on pollution in atmospheric air, physics of molecular phenomena in chromatographic detectors, studies on neutron transport in heterogenous media, studies on evaluation of neutron cross-section in the thermal region, studies on theory and utilization of neural network in data evaluation, numerical modelling of particle cascades for particle accelerator shielding purpose. In this section the description of mentioned activities as well as the information about personnel employed in the Department, papers and reports published in 1994, contribution to conferences and grants is also given.

  16. Impact of Quality Assurance Rounds in a Canadian Radiation Therapy Department

    Energy Technology Data Exchange (ETDEWEB)

    Lefresne, Shilo; Olivotto, Ivo A.; Joe, Howard; Blood, Paul A. [Radiotherapy Department, BC Cancer Agency, Vancouver Island Centre, Vancouver, British Columbia (Canada); Radiotherapy Department, University of British Columbia, Vancouver, British Columbia (Canada); Olson, Robert A., E-mail: rolson2@bccancer.bc.ca [Radiotherapy Department, University of British Columbia, Vancouver, British Columbia (Canada); Radiotherapy Department, BC Cancer Agency, Centre for the North, Prince George, British Columbia (Canada)

    2013-03-01

    Purpose: Quality assurance (QA) programs aim to identify inconsistencies that may compromise patient care. Radiation treatment planning is a well-documented source of variation in radiation oncology, leading many organizations to recommend the implementation of QA rounds in which radiation therapy plans are peer reviewed. This study evaluates the outcome of QA rounds that have been conducted by a radiation therapy department since 2004. Methods and Materials: Prospectively documented records of QA rounds, from 2004 to 2010, were obtained. During rounds, randomly selected radiation therapy plans were peer reviewed and assigned a grade of A (adequate), B (minor suggestions of change to a plan for a future patient), or C (significant change required before the next fraction). The proportion of plans that received each recommendation was calculated, and the relationship between recommendations for each plan, tumor site, and mean years of experience of the radiation oncologist (RO) were explored. Chart reviews were performed for each plan that received a C. Results: During the study period, 1247 plans were evaluated; 6% received a B and 1% received a C. The mean RO years of experience were lower for plans graded C versus those graded A (P=.02). The tumor sites with the highest proportion of plans graded B or C were gastrointestinal (14%), lung (13%), and lymphoma (8%). The most common reasons for plans to receive a grade of C were inadequate target volume coverage (36%), suboptimal dose or fractionation (27%), errors in patient setup (27%), and overtreatment of normal tissue (9%). Conclusions: This study demonstrated that QA rounds are feasible and an important element of a radiation therapy department's QA program. Through peer review, plans that deviate from a department's expected standard can be identified and corrected. Additional benefits include identifying patterns of practice that may contribute to inconsistencies in treatment planning and the

  17. Measuring safety culture: Application of the Hospital Survey on Patient Safety Culture to radiation therapy departments worldwide.

    Science.gov (United States)

    Leonard, Sarah; O'Donovan, Anita

    Minimizing errors and improving patient safety has gained prominence worldwide in high-risk disciplines such as radiation therapy. Patient safety culture has been identified as an important factor in reducing the incidence of adverse events and improving patient safety in the health care setting. The aim of distributing the Hospital Survey on Patient Safety Culture (HSPSC) to radiation therapy departments worldwide was to assess the current status of safety culture, identify areas for improvement and areas that excel, examine factors that influence safety culture, and raise staff awareness. The safety culture in radiation therapy departments worldwide was evaluated by distributing the HSPSC. A total of 266 participants were recruited from radiation therapy departments and included radiation oncologists, radiation therapists, physicists, and dosimetrists. The positive percent scores for the 12 dimensions of the HSPSC varied from 50% to 79%. The highest composite score among the 12 dimensions was teamwork within units; the lowest composite score was handoffs and transitions. The results indicated that health care professionals in radiation therapy departments felt positively toward patient safety. The HSPSC was successfully applied to radiation therapy departments and provided valuable insight into areas of potential improvement such as teamwork across units, staffing, and handoffs and transitions. Managers and policy makers in radiation therapy may use this assessment tool for focused improvement efforts toward patient safety culture. Copyright © 2017 American Society for Radiation Oncology. Published by Elsevier Inc. All rights reserved.

  18. Radiation safety in the nuclear medicine department: impact of the UK Ionising Radiations Regulations

    International Nuclear Information System (INIS)

    Harding, L.K.

    1987-01-01

    The new 1985 regulations and guidance on radiation protection in the U.K. are discussed in relation to the needs for controlled areas in the nuclear medicine department and patient wards, admittance to hospital to comply with legislation, classification of workers, patient waiting rooms, handling flood sources, pregnancy and breast feeding. (U.K.)

  19. Nuclear Research Centre Juelich. 1986 annual work report of the Department for Safety and Radiation Protection

    International Nuclear Information System (INIS)

    Hille, R.; Frenkler, K.L.

    1986-02-01

    The Department for Safety and Radiation Protection continues to be responsible for coordinating radiation protection, safety and protection at the KFA. It supports the other institutes and departments in performing the safety tasks allotted to them. The principal tasks of the Department are in administrative and technical assistance to these organization units and in safeguards. Administrative assistance involves, for example, regulation of the radiation protection organization in the institutes, including the appointment of radiation protection officers (Strahlenschutzbeauftragte). Furthermore, this includes the central handling of the registration system with the authorities and dealing with outside firms thus considerably relieving the institutes of their administrative tasks. Handling licensing procedures and the central accountancy of radioactive materials is also to be mentioned in this context. Technical assistance largely consists of developing, maintaining and repairing radiation measuring instruments and in the monitoring of personnel by evaluating personnel dosimeters and incorporation controls for radioactive sources. The safeguards tasks of the Department concern the very staff-intensive physical protection, as well as environmental protection and industrial safety. (orig./HP) [de

  20. Nuclear Research Centre Juelich. 1987 annual work report of the Department for Safety and Radiation Protection

    International Nuclear Information System (INIS)

    Hille, R.

    1988-03-01

    The Department for Safety and Radiation Protection continues to be responsible for coordinating radiation protection, safety and protection at the KFA. It supports the other institutes and departments in performing the safety tasks allotted to them. The principal tasks of the Department are in administrative and technical assistance to these organization units and in safeguards. Administrative assistance involves, for example, regulation of the radiation protection organization in the institutes, including the appointment of radiation protection officers (Strahlenschutzbeauftragte). Furthermore, this includes the central handling of the registration system with the authorities and dealing with outside firms thus considerably relieving the institutes of their administrative tasks. Handling licensing procedures and the central accountancy of radioactive materials is also to be mentioned in this context. Technical assistance largely consists of developing, maintaining and repairing radiation measuring instruments and in the monitoring of personnel by evaluating personnel dosimeters and incorporation controls for radioactive sources. The safeguards tasks of the Department concern the very staff-intensive physical protection, as well as environmental protection and industrial safety. (orig./HP) [de

  1. Radiation doses of employees of a nuclear medicine department after implementation of more rigorous radiation protection methods

    International Nuclear Information System (INIS)

    Piwowarska-Bilska, H.; Supinska, A.; Listewnik, M. H.; Zorga, P.; Birkenfeld, B.

    2013-01-01

    The appropriate radiation protection measures applied in departments of nuclear medicine should lead to a reduction in doses received by the employees. During 1991-2007, at the Department of Nuclear Medicine of Pomeranian Medical University (Szczecin, Poland), nurses received on average two-times higher (4.6 mSv) annual doses to the whole body than those received by radiopharmacy technicians. The purpose of this work was to examine whether implementation of changes in the radiation protection protocol will considerably influence the reduction in whole-body doses received by the staff that are the most exposed. A reduction in nurses' exposure by ∼63% took place in 2008-11, whereas the exposure of radiopharmacy technicians grew by no more than 22% in comparison with that in the period 1991-2007. Proper reorganisation of the work in departments of nuclear medicine can considerably affect dose reduction and bring about equal distribution of the exposure. (authors)

  2. Energy Department radiation rhetoric, actions at odds

    International Nuclear Information System (INIS)

    Lobsenz, G.

    1994-01-01

    Only months after Energy Secretary Hazel O'Leary pledged that DOE would open-quotes come cleanclose quotes about past radiation abuses, the department is refusing to release individual exposure records of former workers at its heavily contaminated Fernald uranium plant. At the same time O'Leary was flying around the country to tout a new era of openness at the department, top DOE officials in January told attorneys representing the Fernald workers that individual exposure records would not be forthcoming. While agreeing to provide general health data, DOE specifically refused to disclose the names of the workers involved or their specific exposure histories at the plant, citing privacy concerns. The workers' attorneys contend the privacy concerns are spurious since every former Fernald worker contacted about possible overexposure has waived the privacy privilege and authorized DOE to release his or her records. The attorneys also note that DOE under the Bush administration released worker exposure information related to its Hanford, Wash., plant after the government and outside attorneys agreed to a protective order that assured privacy rights were not violated. The Fernald workers' attorneys maintain DOE is refusing to disclose the names of the workers to ensure that no additional workers are contacted by the attorneys and told about their possible overexposure - and the pending litigation seeking compensation for the alleged injuries. And as DOE remains silent, the attorneys say, the former Fernald workers are going without medical treatment for any possible radiation-related ailments they may have suffered as a result of working at the plant

  3. Occupational radiation exposure in nuclear medicine department in Kuwait

    Science.gov (United States)

    Alnaaimi, M.; Alkhorayef, M.; Omar, M.; Abughaith, N.; Alduaij, M.; Salahudin, T.; Alkandri, F.; Sulieman, A.; Bradley, D. A.

    2017-11-01

    Ionizing radiation exposure is associated with eye lens opacities and cataracts. Radiation workers with heavy workloads and poor protection measures are at risk for vision impairment or cataracts if suitable protection measures are not implemented. The aim of this study was to measure and evaluate the occupational radiation exposure in a nuclear medicine (NM) department. The annual average effective doses (Hp[10] and Hp[0.07]) were measured using calibrated thermos-luminescent dosimeters (TLDs; MCP-N [LiF:Mg,Cu,P]). Five categories of staff (hot lab staff, PET physicians, NM physicians, technologists, and nurses) were included. The average annual eye dose (Hp[3]) for NM staff, based on measurements for a typical yearly workload of >7000 patients, was 4.5 mSv. The annual whole body radiation (Hp[10]) and skin doses (Hp[0.07]) were 4.0 and 120 mSv, respectively. The measured Hp(3), Hp(10), and Hp(0.07) doses for all NM staff categories were below the dose limits described in ICRP 2014 in light of the current practice. The results provide baseline data for staff exposure in NM in Kuwait. Radiation dose optimization measures are recommended to reduce NM staff exposure to its minimal value.

  4. Low doses of radiation: epidemiological investigations

    International Nuclear Information System (INIS)

    Dikiy, N.P.; Dovbnya, A.N.; Medvedeva, E.P.

    2013-01-01

    Influence of small dozes of radiation was investigated with the help epidemiologic evidence. Correlation analysis, regression analysis and frequency analysis were used for investigating morbidity of various cancer illnesses. The pollution of the environment and the fallout of radionuclides in 1962 and 1986 years have an influence upon morbidity of cancer. Influence of small dozes of radiation on health of the population is multifactorial. Therefore depending on other adverse external conditions the influence of radiation in small dozes can be increased or is weakened. Such character of influence of radiation in small dozes proposes the differentiated approach at realization of preventive measures. Especially it concerns regions with favorable ecological conditions.

  5. Human radiation experiments: The Department of Energy roadmap to the story and the records

    Energy Technology Data Exchange (ETDEWEB)

    1995-02-01

    The role of the US Government in conducting or sponsoring human radiation experiments has become the subject of public debate. Questions have been raised about the purpose, extent, and health consequences of these studies, and about how subjects were selected. The extent to which subjects provided informed consent is also under scrutiny. To respond to these questions, the Clinton administration has directed the US Department of Energy (DOE), along with other Federal agencies, to retrieve and inventory all records that document human radiation experiments. Many such records are now publicly available and will permit an open accounting and understanding of what took place. This report summarizes the Department`s ongoing search for records about human radiation experiments. It is also a roadmap to the large universe of pertinent DOE information. DOE is working to instill greater openness--consistent with national security and other appropriate considerations--throughout its operations. A key aspect of this effort is opening DOE`s historical records to independent research and analysis.

  6. Investigation of status of safety management in radiation handle works

    International Nuclear Information System (INIS)

    Amauchi, Hiroshi; Nishimura, Kenji; Izumi, Kokichi

    2007-01-01

    This report describes the investigation in the title concerning the system for safety management and for accident prevention, which was done by a questionnaire in a period of 1.5 months in 2005. The questionnaire including 55 questions for safety management system, 33 for instruments and safety utilization of radiation and 57 for present status of safety management in high-risk radiation works, was performed in 780 hospitals, of which 313 answered. The first 55 questions concerned with the facility, patient identification, information exchange, management of private information, safety management activities, measures to prevent accident, manual preparation, personnel education and safety awareness; the second, with management of instruments, package insert, system for reporting the safety information, management of implants, re-imaging and radiation protection; and the third, with the systems for patients' emergency, in departments of CT/MR, of IVR, of nuclear diagnosis and of radiation therapy. Based on the results obtained, many problems, tasks and advices are presented to various items and further continuation of efforts to improve the present status is mentioned to be necessary. Details are given in the homepage of the Japanese Society of Radiological Technology. (T.I.)

  7. Delegation of medical tasks in French radiation oncology departments: current situation and impact on residents' training.

    Science.gov (United States)

    Thureau, S; Challand, T; Bibault, J-E; Biau, J; Cervellera, M; Diaz, O; Faivre, J-C; Fumagalli, I; Leroy, T; Lescut, N; Martin, V; Pichon, B; Riou, O; Dubray, B; Giraud, P; Hennequin, C

    2013-10-01

    A national survey was conducted among the radiation oncology residents about their clinical activities and responsibilities. The aim was to evaluate the clinical workload and to assess how medical tasks are delegated and supervised. A first questionnaire was administered to radiation oncology residents during a national course. A second questionnaire was mailed to 59 heads of departments. The response rate was 62% for radiation oncology residents (99 questionnaires) and 51% for heads of department (30). Eighteen heads of department (64%) declared having written specifications describing the residents' clinical tasks and roles, while only 31 radiation oncology residents (34%) knew about such a document (P=0.009). A majority of residents were satisfied with the amount of medical tasks that were delegated to them. Older residents complained about insufficient exposure to new patient's consultation, treatment planning and portal images validation. The variations observed between departments may induce heterogeneous trainings and should be addressed specifically. National specifications are necessary to reduce heterogeneities in training, and to insure that the residents' training covers all the professional skills required to practice radiation oncology. A frame endorsed by academic and professional societies would also clarify the responsibilities of both residents and seniors. Copyright © 2013 Société française de radiothérapie oncologique (SFRO). Published by Elsevier SAS. All rights reserved.

  8. Human radiation experiments associated with the US Department of Energy and its predecessors

    Energy Technology Data Exchange (ETDEWEB)

    None

    1995-07-01

    This document contains a listing, description, and selected references for documented human radiation experiments sponsored, supported, or performed by the US Department of Energy (DOE) or its predecessors, including the US Energy Research and Development Administration (ERDA), the US Atomic Energy Commission (AEC), the Manhattan Engineer District (MED), and the Off ice of Scientific Research and Development (OSRD). The list represents work completed by DOE`s Off ice of Human Radiation Experiments (OHRE) through June 1995. The experiment list is available on the Internet via a Home Page on the World Wide Web (http://www.ohre.doe.gov). The Home Page also includes the full text of Human Radiation Experiments. The Department of Energy Roadmap to the Story and the Records (DOE/EH-0445), published in February 1995, to which this publication is a supplement. This list includes experiments released at Secretary O`Leary`s June 1994 press conference, as well as additional studies identified during the 12 months that followed. Cross-references are provided for experiments originally released at the press conference; for experiments released as part of The DOE Roadmap; and for experiments published in the 1986 congressional report entitled American Nuclear Guinea Pigs: Three Decades of Radiation Experiments on US Citizens. An appendix of radiation terms is also provided.

  9. Radiation exposures for DOE [Department of Energy] and DOE contractor employees, 1988

    International Nuclear Information System (INIS)

    Merwin, S.E.; Traub, R.J.; Millet, W.H.

    1990-12-01

    This is the 21st in a series of annual radiation exposure reports published by the Department of Energy (DOE) or its predecessors. This report summarizes the radiation exposures received at DOE and DOE contractor facilities in 1988. Radiation exposures to both employees and visitors are included. Trends in radiation exposures are evaluated by comparing the doses received in 1988 to those received in previous years. The significance of the doses is addressed by comparing them to the DOE limits and by correlating the doses to health risks based on risk estimates from expert groups. This report represents a significant advancement from previous reports because it is the first for which detailed exposure data are available for each individual monitored at a DOE facility. This reports contains information on different types of radiation doses, such as penetrating, shallow, and neutron doses. It also contains analysis of exposures by age, sex, and occupation of the exposed individuals. This report is the first of any federal organization that presents such detailed exposure data. The purpose of this report is to disseminate information regarding radiation exposures received at US Department of Energy (DOE) and DOE contractor facilities. The primary purpose of this practice is to ensure that the DOE occupational dose limits are not exceeded and that as low as reasonably achievable (ALARA) goals are met. A secondary purpose, however, is to provide information that can be used by other organizations and individuals who wish to collect and analyze such information. This information may be useful for estimating the effect of changing dose limits on operations at DOE facilities, determining the progress of DOE with respect to the ALARA principle, or, in combination with epidemiological information, assisting researchers in determining whether or not low doses of ionizing radiation are harmful. 23 refs., 20 figs., 23 tabs

  10. Requirements in the Overseas Employment and Domestic Connected Education for Radiological Technologists : Refers to Students Enrolled in the Department of Radiation

    International Nuclear Information System (INIS)

    Han, Eun Ok; Kim, Boo Soon

    2008-01-01

    This study investigated the realities of information acquirements and its requirements in the overseas employment and domestic connected education for students at the department of radiation in order to provide basic information for developing the standard educational curriculum for future internationalization in the education of radiation and presenting its direction. The investigation implemented in this study was performed through a questionnaire with 688 students enrolled in the department of radiation. The conclusion of the investigation is summarized as follows : The answers for the question of 'No acquirements in the information of the overseas employment and connected education for radiological technologists' were 487 students (70.8%), and the reason that 'There are no chances in related education' was the highest rate, 424 students (61.6%), of the answers. In the education for the overseas employment, the answers for the question of 'Select a connected education program in school instead of study abroad' were the highest rate, 436 students (63.4%). The most concerned country for the overseas employment was 'Australia', 247 students (35.9%). As a result, answers for the interest, participation, need, and hope for the overseas employment showed high rates even though they demonstrated a low recognition level in the overseas employment. In addition, it is necessary to strategically plan an education program for this issue because all participants agree with the current stream.

  11. Central Safety Department, annual report 1987

    International Nuclear Information System (INIS)

    Kiefer, H.; Koenig, L.A.

    1988-02-01

    The Central Safety Department is responsible for handling all problems of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The r+d work concentrates on the following aspects: physical and chemical behaviour of biologically particularly active radionuclides, behaviour of HT in the air/plan/soil system, biophysics of multicellular systems, improvement in radiation protection measurement and personnel dosimetry. This report gives details of the different duties, indicates the results of 1987 routine tasks and reports about results of investigations and developments of the working groups of the Department. (orig./HP) [de

  12. Practical radiation protection in hospitals. A view at the nuclear medicine departement of the University Hospital of Cologne

    International Nuclear Information System (INIS)

    Sudbrock, Ferdinand

    2011-01-01

    Radiation protection plays a predominant role in nuclear medicine departments as they are installations dealing with open radioactive substances. Many experts in radiation protection who are not directly involved in nuclear medicine may only have a vague insight into the daily routine of such installations. This contribution would like to give an impression by making a virtual tour through the nuclear medicine department of the University Hospital of Cologne - a department that covers a large part of the ability spectrum of this discipline. This tour will show some specialities concerning radiation protection in diagnostic and therapeutic procedures. (orig.)

  13. Analysis of radiation doses to patients from diagnostic department of nuclear medicine

    International Nuclear Information System (INIS)

    Lepej, L.; Messingerova, M.

    1995-01-01

    In this paper the values of mean effective dose equivalents per unit activity (H E/1Bq ) were used for the calculation of mean effective dose equivalents for one examination (H E ). The collective effective dose equivalents for each radiopharmaceutical and type of examination (S ER ) and global collective effective dose equivalent for department for all radiopharmaceuticals (S E ) during evaluated period were defined. The data for years from 1992 to 1994 were evaluated and compared with results in literature. The evaluation of radiation doses in nuclear medicine department is useful parameter for internal quality control. Using this method, the radiation dose in this laboratory was changed to minimum (under mean value of Slovak Republic). Unfortunately, the real data of patients radiation doses are different from the calculated one. Due to different kinetic of radiopharmaceuticals in individual patients (influenced by pathology, age, etc.) the evaluation of radiation burden to nuclear medicine patients is problematic. But this approach enable the relative comparison of the changes in values of H E and S E during the observed period. The evaluation of individual (minimal) effective dose equivalent - (H min ) which represents dose calculated under physiologic conditions can be useful for indication of diagnostic examination by physicians. Therefore the systematic registration of H min from all examinations - patient's radiation history. This is specially important in the case of children and young people. The importance of the proposed method, is in regulation of radiation dose from nuclear medicine diagnostic examinations, not only be the control of number and type of examinations, but also by selection of used radiopharmaceuticals and by the way how to use them. (J.K.) 1 fig., 2 refs

  14. Analysis of radiation doses to patients from diagnostic department of nuclear medicine

    Energy Technology Data Exchange (ETDEWEB)

    Lepej, L; Messingerova, M [F.D. Rosvelt Hospital, Banska Bystrica (Slovakia). Dept. of Nuclear Medicine; Ftacnikova, S [Inst. of Preventive and Clinical Medicine, Bratislava (Slovakia)

    1996-12-31

    In this paper the values of mean effective dose equivalents per unit activity (H{sub E/1Bq}) were used for the calculation of mean effective dose equivalents for one examination (H{sub E}). The collective effective dose equivalents for each radiopharmaceutical and type of examination (S{sub ER}) and global collective effective dose equivalent for department for all radiopharmaceuticals (S{sub E}) during evaluated period were defined. The data for years from 1992 to 1994 were evaluated and compared with results in literature. The evaluation of radiation doses in nuclear medicine department is useful parameter for internal quality control. Using this method, the radiation dose in this laboratory was changed to minimum (under mean value of Slovak Republic). Unfortunately, the real data of patients radiation doses are different from the calculated one. Due to different kinetic of radiopharmaceuticals in individual patients (influenced by pathology, age, etc.) the evaluation of radiation burden to nuclear medicine patients is problematic. But this approach enable the relative comparison of the changes in values of H{sub E} and S{sub E} during the observed period. The evaluation of individual (minimal) effective dose equivalent - (H{sub min}) which represents dose calculated under physiologic conditions can be useful for indication of diagnostic examination by physicians. Therefore the systematic registration of H{sub min} from all examinations - patient`s radiation history. This is specially important in the case of children and young people. The importance of the proposed method, is in regulation of radiation dose from nuclear medicine diagnostic examinations, not only be the control of number and type of examinations, but also by selection of used radiopharmaceuticals and by the way how to use them. (J.K.) 1 fig., 2 refs.

  15. Central Safety Department. Annual report 1986

    International Nuclear Information System (INIS)

    Kiefer, H.; Koenig, L.A.

    1987-03-01

    The Safety Officer and the Security Officer are responsible for radiation protection and technical safety, both conventional and nuclear, for the physical protection as well as the safeguards of nuclear materials and radioactive substances within the Kernforschungszentrum Karlsruhe GmbH (KfK). To fulfill these functions they rely on the assistance of the Central Safety Department. The Central Safety Department is responsible for handling all problems of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The r+d work concentrates on the following aspects: physical and chemical behavior of biologically particularly active radionuclides, behavior of HT in the air/plant/soil system, biophysics of multicellular systems, improvement in radiation protection measurement and personnel dosimetry. The report gives details of the different duties, indicates the results of 1986 routine tasks and reports about results of investigations and developments of the working groups of the Department. (orig.) [de

  16. The Juno Radiation Monitoring (RM) Investigation

    DEFF Research Database (Denmark)

    Becker, H. N.; Alexander, J. W.; Adriani, A.

    2017-01-01

    The Radiation Monitoring Investigation of the Juno Mission will actively retrieve and analyze the noise signatures from penetrating radiation in the images of Juno’s star cameras and science instruments at Jupiter. The investigation’s objective is to profile Jupiter’s > 10-MeV electron environmen...

  17. Human radiation experiments: The Department of Energy roadmap to the story and the records

    International Nuclear Information System (INIS)

    1995-02-01

    The role of the US Government in conducting or sponsoring human radiation experiments has become the subject of public debate. Questions have been raised about the purpose, extent, and health consequences of these studies, and about how subjects were selected. The extent to which subjects provided informed consent is also under scrutiny. To respond to these questions, the Clinton administration has directed the US Department of Energy (DOE), along with other Federal agencies, to retrieve and inventory all records that document human radiation experiments. Many such records are now publicly available and will permit an open accounting and understanding of what took place. This report summarizes the Department's ongoing search for records about human radiation experiments. It is also a roadmap to the large universe of pertinent DOE information. DOE is working to instill greater openness--consistent with national security and other appropriate considerations--throughout its operations. A key aspect of this effort is opening DOE's historical records to independent research and analysis

  18. 1978 annual report of the safety department

    International Nuclear Information System (INIS)

    Kiefer, H.; Koelzer, W.

    1979-04-01

    The Safety Officer and the Security Officer, respectively, are responsible for radiation protection and technical safety, both conventional and nuclear, for the physical protection as well as the security of nuclear materials and radioactive substances within the Kernforschungszentrum Karlsruhe GmbH. (KfK). To fulfill these functions they rely on the assitance of the Safety Department. The duties of this Department cover tasks relative to radiation protection, safety and security on behalf of the institutes and departments of KfK and environmental monitoring for the whole Karlsruhe Nuclear Research Center as well as research and development work, mainly performed under the Nuclear Safety Project and the Nuclear Safeguards Project. The centers of interest of r and d activities are: investigation of the atmospheric diffusion of nuclear pollutants on the micro- and meso-scales, evaluation of the radiological consequences of accidents in reactors under probabilistic aspects, studies of the physical and chemical behavior of radionuclides with particularly high biological effectiveness in the environment, implementation of nuclear fuel safequarding systems, improvements in radiation protection measurement technology. This report gives details of the different duties, indicates the results of 1978 routine tasks, and reports about new results of investigations and developments of the working groups of the Department. (orig.) [de

  19. Annual Report 1979 of the Safety Department

    International Nuclear Information System (INIS)

    Kiefer, H.; Koelzer, W.; Koenig, L.A.

    1980-04-01

    The Safety Officer and the Security Officer, respectively, are responsible for radiation protection and technical safety, both conventional and nuclear, for the physical protection as well as the security of nuclear materials and radioactive substances within the Kernforschungszentrum Karlsruhe GmbH. (KfK). To fulfill these functions they rely on the assistance of the Safety Department. The duties of this Department cover tasks relative to radiation protection, safety and security on behalf of the institutes and departments of KfK and environmental monitoring for the whole Karlsruhe Nuclear Research Center as well as research and development work, mainly performed under the Nuclear Safety Project and the Nuclear Safeguards Project. The centers of interest of r and d activities are: investigation of the atmospheric diffusion of nuclear pollutants on the micro- and meso-scales, evaluation of the radiological consequences of accidents in reactors under probabilistic aspects, studies of the physical and chemical behavior of radionuclides with particularly high biological effectiveness in the environment, implemantation of nuclear fuel safeguarding systems, improvements in radiation protection measurement technology. This report gives details of the different duties, indicates the results of 1979 routine tasks, and reports about results of investigations and developments of the working groups of the Department. (orig.) [de

  20. Evaluation of radiation protection of the radiotherapy department in cancer hospital

    International Nuclear Information System (INIS)

    Feng Ningyuan; Zhang Hongzhi; Yu Yun

    1987-01-01

    In this paper, the emphases are put on the description of design principle and calculation method for radiation protection in the new radiotherapy department of Cancer Research Institute and Hospital, Chinese Academy of Medical Science, as well as the evaluation of meusaring results. In addition, the problem of photo-neutron contamination among 16 MV X-ray from SL 75-20 Philips Linear Accelerator and its relavent shielding measures have been discussed

  1. When Marcoule's radiation protection department was talking nuclear energy with comics.

    International Nuclear Information System (INIS)

    Portelli, Aurelien; Guarnieri, Franck; Parizel, Claire

    2015-01-01

    The radiation protection department (SPR) of the CEA Marcoule centre implemented in the beginning of the 1960's an information program aiming at counteracting the false ideas circulating about nuclear industry. The centre benefited from the artistic skill of Jacques Castan who made posters and comics to illustrate the safety campaigns of the SPR. This article analyses the methods used by Castan to promote nuclear industry to the general public

  2. Investigation of graphene-based nanoscale radiation sensitive materials

    Science.gov (United States)

    Robinson, Joshua A.; Wetherington, Maxwell; Hughes, Zachary; LaBella, Michael, III; Bresnehan, Michael

    2012-06-01

    Current state-of-the-art nanotechnology offers multiple benefits for radiation sensing applications. These include the ability to incorporate nano-sized radiation indicators into widely used materials such as paint, corrosion-resistant coatings, and ceramics to create nano-composite materials that can be widely used in everyday life. Additionally, nanotechnology may lead to the development of ultra-low power, flexible detection systems that can be embedded in clothing or other systems. Graphene, a single layer of graphite, exhibits exceptional electronic and structural properties, and is being investigated for high-frequency devices and sensors. Previous work indicates that graphene-oxide (GO) - a derivative of graphene - exhibits luminescent properties that can be tailored based on chemistry; however, exploration of graphene-oxide's ability to provide a sufficient change in luminescent properties when exposed to gamma or neutron radiation has not been carried out. We investigate the mechanisms of radiation-induced chemical modifications and radiation damage induced shifts in luminescence in graphene-oxide materials to provide a fundamental foundation for further development of radiation sensitive detection architectures. Additionally, we investigate the integration of hexagonal boron nitride (hBN) with graphene-based devices to evaluate radiation induced conductivity in nanoscale devices. Importantly, we demonstrate the sensitivity of graphene transport properties to the presence of alpha particles, and discuss the successful integration of hBN with large area graphene electrodes as a means to provide the foundation for large-area nanoscale radiation sensors.

  3. Annual report 1982 of the Central Safety Department

    International Nuclear Information System (INIS)

    Kiefer, H.; Koelzer, W.; Koenig, L.A.

    1983-04-01

    The Safety Officer and the Security Officer are responsible for radiation protection and technical safety, both conventional and nuclear, for the physical protection as well as the safeguards of nuclear materials and radioactive substances within the Kernforschungszentrum Karlsruhe GmbH (KfK). To fulfill these functions they rely on the assistance of the Safety Department. The duties of this Department cover tasks relative to radiation protection, safety and security on behalf of the institutes and departments of KfK and environmental monitoring for the whole Karlsruhe Nuclear Research Center as well as research and development work, mainly performed under the Nuclear Safety Project. The centers of interest of r + d activities are: investigation of the atmospheric diffusion of nuclear pollutants on the micro- and meso-scales, evaluation of the radiological consequences of accidents in reactors under probabilistic aspects, studies of the physical and chemical behavior of radionuclides with particularly high biological effectiveness in the environment, improvements in radiation protection measurement technology. This report gives details of the different duties, indicates the results of 1982 routine tasks and reports about results of investigations and developments of the working groups of the Department. The reader is referred to the English translation of the Table of Contents and of Chapter 1 describing the duties and organization of the Central Safety Department. (orig.) [de

  4. Annual report 1988 of the Central Safety Department

    International Nuclear Information System (INIS)

    Koelzer, W.; Urban, M.

    1989-04-01

    The Central Safety Department is responsible for handling all problems of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The r+d work concentrates on the following aspects: physical and chemical behavior of biologically particularly active radionuclides, behavior of tritium in the air/plant/soil system, biophysics of multicellular systems, improvement in radiation protection measurement and personnel dosimetry. This report gives details of the different duties, indicates the results of 1988 routine tasks and reports about results of investigations and developments of the working groups of the Department. The reader is referred to the English translation of the Table of Contents and of Chapter 1 describing the duties and organization of the Central Safety Department. (orig./HP) [de

  5. Annual report 1991 of the Central Safety Department

    International Nuclear Information System (INIS)

    Koelzer, W.

    1992-04-01

    The Central Safety Department is responsible for handling all problems of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The research and development work concentrates on the following aspects: Physical and chemical behavior of trace elements in the environment, behavior of tritium in the air/plant/soil system, biophysics of multicellular systems, improvement in radiation protection measurement and personnel dosimetry. This report gives details of the different duties, indicates the results of 1989 routine tasks and reports about results of investigations and developments of the working groups of the Department. The reader is referred to the English translation of the Table of Contents and of Chapter 1 describing the duties and organization of the Central Safety Department. (orig.) [de

  6. Annual report 1990 of the Central Safety Department

    International Nuclear Information System (INIS)

    Koelzer, W.; Urban, M.

    1991-04-01

    The Central Safety Department is responsible for handling all problems of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The research and development work concentrates on the following aspects: Physical and chemical behavior of trace elements in the environment, behavior of tritium in the air/plant/soil system, biophysics of multicellular systems, improvement in radiation protection measurement and personnel dosimetry. This report gives details of the different duties, indicates the results of 1989 routine tasks and reports about results of investigations and developments of the working groups of the Department. The reader is referred to the English translation of the Table of Contents and of Chapter 1 describing the duties and organization of the Central Safety Department. (orig.) [de

  7. Investigating Undergraduate Students’ Conceptions of Radiation

    Science.gov (United States)

    Romine, James M.; Buxner, Sanlyn; Impey, Chris; Nieberding, Megan; Antonellis, Jessie C.

    2014-11-01

    Radiation is an essential topic to the physical sciences yet is often misunderstood by the general public. The last time most people have formal instruction about radiation is as students in high school and this knowledge will be carried into adulthood. Peoples’ conceptions of radiation influence their attitude towards research regarding radiation, radioactivity, and other work where radiation is prevalent. In order to understand students’ ideas about radiation after having left high school, we collected science surveys from nearly 12,000 undergraduates enrolled in introductory science courses over a span of 25 years. This research investigates the relationship between students’ conceptions of radiation and students’ personal beliefs and academic field of study.Our results show that many students in the sample were unable to adequately describe radiation. Responses were typically vague, brief, and emotionally driven. Students’ field of study was found to significantly correlate with their conceptions. Students pursuing STEM majors were 60% more likely to describe radiation as an emission and/or form of energy and cited atomic or radioactive sources of radiation twice as often as non-STEM students. Additionally, students’ personal beliefs also appear to relate to their conceptions of radiation. The most prominent misconception shown was that radiation is a generically harmful substance, which was found to be consistent throughout the duration of the study. In particular, non-science majors in our sample had higher rates of misconceptions, often generalized the idea of radiation into a broad singular topic, and had difficulty properly identifying sources.Generalized ideas of radiation and the inability to properly recognize sources of radiation may contribute to the prevalent misconception that radiation is an inexplicably dangerous substance. A basic understanding of both electromagnetic and particulate radiation and the existence of radiation at various

  8. Evaluation of management of radioactive waste in nuclear medicine department of radiation and isotopes center, Khartoum

    International Nuclear Information System (INIS)

    Ahmed, Amel Bushra Abaker

    2001-01-01

    Evaluation of management of radioactive waste in nuclear medicine department of radiation and isotopes center in Khartoum, Sudan, was conducted using radiation survey meter. The purpose of this study is to provide protection of workers, patients, co patients, an the environment by introducing good practice in management of radioactive waste generated in this lab. In this work measurement of radiation effective dose at different locations in the department were carried out. These locations were selected around the radioactive liquid and solid waste disposal position. It was found that the effective doses per year from radioactive wastes obtained through this work using the survey meter RDS-120 at these locations, are 1.47 mSv/y at the neighbouring patients room, 5.47 mSv/y at the hot lab., 0.09 mSv/y at the neighbouring toilet, 0.321 mSv/y at the water closet, and 1.4 mSv/y at the place down water closet. The results obtained shows that the dose levels waste at the location not exceed the recommended dose limits for workers 20 mSv/y, that set by basic safety standards (Bss 115) which published by the international atomic energy agency. Also it s comply with the national regulation, regulation on basic radiation protection requirement and dose limits 1996, issued by sudan atomic energy commission act 1996. The annual dose calculated for the patients and co-patients at rooms around the nuclear medicine department, the results shows that dose are fairly high. Measure should taken to improve the waste management in the department for better protection of workers, patients and co patients. (Author)

  9. Evaluating stress, burnout and job satisfaction in New Zealand radiation oncology departments.

    Science.gov (United States)

    Jasperse, M; Herst, P; Dungey, G

    2014-01-01

    This research aimed to determine the levels of occupational stress, burnout and job satisfaction among radiation oncology workers across New Zealand. All oncology staff practising in all eight radiation oncology departments in New Zealand were invited to participate anonymously in a questionnaire, which consisted of the Maslach Burnout Inventory and measures of stress intensity associated with specific occupational stressors, stress reduction strategies and job satisfaction. A total of 171 (out of 349) complete responses were analysed using spss 19; there were 23 oncologists, 111 radiation therapists, 22 radiation nurses and 15 radiation physicists. All participants, regardless of profession, reported high stress levels associated with both patient-centred and organisational stressors. Participants scored high in all three domains of burnout: emotional exhaustion, depersonalisation and personal accomplishment. Interestingly, although organisational stressors predicted higher emotional exhaustion and emotional exhaustion predicted lower job satisfaction, patient stressors were associated with higher job satisfaction. Job satisfaction initiatives such as ongoing education, mentoring and role extension were supported by many participants as was addressing organisational stressors, such as lack of recognition and support from management and unrealistic expectations and demands. New Zealand staff exhibit higher levels of burnout than Maslach Burnout Inventory medical norms and oncology workers in previous international studies. © 2013 John Wiley & Sons Ltd.

  10. Annual report of Radiation Laboratory Department of Nuclear Engineering Kyoto University for fiscal 1993

    International Nuclear Information System (INIS)

    1994-07-01

    This publication is the collection of the papers presented research activities of Radiation Laboratory, Department of Nuclear Engineering, Kyoto University during the 1993 academic/fiscal year (April, 1993 - March, 1994). The 47 of the presented papers are indexed individually. (J.P.N.)

  11. Annual report of Radiation Laboratory Department of Nuclear Engineering Faculty of Engineering, Kyoto University

    International Nuclear Information System (INIS)

    1993-07-01

    This publication is the collection of the papers presented research activities of Radiation laboratory, Department of Nuclear Engineering, Kyoto University during the 1992 academic/fiscal year (April, 1992 - March, 1993). The 48 of the presented papers are indexed individually. (J.P.N.)

  12. Karlsruhe Nuclear Research Center, Central Safety Department. Annual report 1993

    International Nuclear Information System (INIS)

    Koelzer, W.

    1994-04-01

    The Central Safety Department is responsible for handling all tasks of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The research and development work concentrates on the following aspects: behavior of trace elements in the environment and decontamination of soil, behavior of tritium in the air/soil-plant system, improvement in radiation protection measurements and personnel dosimetry. This report gives details of the different duties, indicates the results of 1993 routine tasks and reports about results of investigations and developments of the working groups of the Department. (orig.) [de

  13. Atmospheric Radiation Measurement Madden-Julian Oscillation Investigation Experiment Field Campaign Report

    Energy Technology Data Exchange (ETDEWEB)

    Long, Chuck [National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). Earth System Research Lab.

    2016-07-01

    Every 30–90 days during the Northern Hemisphere winter, the equatorial tropical atmosphere experiences pulses of extraordinarily strong deep convection and rainfall. This phenomenon is referred to as the Madden–Julian Oscillation, or MJO, named after the scientists who identified this cycle. The MJO significantly affects weather and rainfall patterns around the world (Zhang 2013). To improve predictions of the MJO—especially about how it forms and evolves throughout its lifecycle—an international group of scientists collected an unprecedented set of observations from the Indian Ocean and western Pacific region from October 2011 through March 2012 through several coordinated efforts. The coordinated field campaigns captured six distinct MJO cycles in the Indian Ocean. The rich set of observations capturing several MJO events from these efforts will be used for many years to study the physics of the MJO. Here we highlight early research results using data from the Atmospheric Radiation Measurement (ARM) Madden-Julian Oscillation Investigation Experiment (AMIE), sponsored by the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility.

  14. Radiation Dose Risk and Diagnostic Benefit in Imaging Investigations

    OpenAIRE

    Dobrescu, Lidia; Rădulescu, Gheorghe-Cristian

    2015-01-01

    The paper presents many facets of medical imaging investigations radiological risks. The total volume of prescribed medical investigations proves a serious lack in monitoring and tracking of the cumulative radiation doses in many health services. Modern radiological investigations equipment is continuously reducing the total dose of radiation due to improved technologies, so a decrease in per caput dose can be noticed, but the increasing number of investigations has determined a net increase ...

  15. Investigation of epigenetic gene regulation in Arabidopsis modulated by gamma radiation

    International Nuclear Information System (INIS)

    Woo, Hye Ryun; Kim, Jae Sung; Lee, Myung Jin; Lee, Dong Joon; Kim, Young Min; Jung, Joon Yong; Han, Wan Keun; Kang, Soo Jin

    2011-12-01

    To investigate epigenetic gene regulation in Arabidopsis modulated by gamma radiation, we examined the changes in DNA methylation and histone modification after gamma radiation and investigated the effects of gamma radiation on epigenetic information and gene expression. We have selected 14 genes with changes in DNA methylation by gamma radiation, analyzed the changes of histone modification in the selected genes to reveal the relationship between DNA methylation and histone modification by gamma radiation. We have also analyzed the effects of gamma radiation on gene expression to investigate the relationship between epigenetic information and gene expression by gamma radiation. The results will be useful to reveal the effects of gamma radiation on DNA methylation, histone modification and gene expression. We anticipate that the information generated in this proposal will help to find out the mechanism underlying the changes in epigenetic information by gamma radiation

  16. Nuclear radiation applications in hydrological investigations

    International Nuclear Information System (INIS)

    Rao, S.M.

    1978-01-01

    The applications of radiation sources for the determination of water and soil properties in hydrological investigations are many and varied. These include snow gauging, soil moisture and density determinations, measurement of suspended sediment concentrations in natural streams and nuclear well logging for groundwater exploitation. Besides the above, many radiation physics aspects play an important role in the development of radiotracer techniques, particularly in sediment transport studies. The article reviews the above applications with reference to their limitations and advantages. (author)

  17. Investigation of radiation skin dose in interventional cardiology

    International Nuclear Information System (INIS)

    Webster, C.M.; Horrocks, J.; Hayes, D.

    2001-01-01

    Background - The study investigated the radiation skin doses for interventional patients in cardiology; two procedures which have the highest radiation dose are Radiofrequency Catheter Ablation (RFCA) and Percutaneous Transluminal Coronary Angioplasty (PTCA). Methods and Results - 56 patients were randomly selected and investigated; 23 patients in the RFCA group and 33 in the PTCA group. Skin and effective dose were calculated from Dose Area Product (DAP). Thermoluminescent Dosimetry was the second method of dose measurement used. Patients were followed-up for a three month period to check for possible skin reactions resulting from the radiation dose during the procedure. Radiation skin doses in 14 patients were calculated to be more than 1 Gy, including three patients who received more than 2 Gy, the threshold dose for deterministic effects of radiation. 7 patients (12.5%) reported skin reactions as a result of the radiation received to their backs during the procedure. Mean DAP and estimated effective doses were 105 Gycm 2 and 22.5 mSv for RFCA, and 32 Gycm 2 and 6.2 mSv for PTCA procedures respectively. Conclusion - Complex procedures in Interventional Cardiology can exceed the threshold level for deterministic effects in the skin. (author)

  18. Investigation of self-indicating radiation personal dosimeter

    International Nuclear Information System (INIS)

    Xia Wen; Ye Honsheng; Lin Min; Xu Lijun; Chen Kesheng; Chen Yizhen

    2014-01-01

    A self-indicating radiation personal dosimeter was investigated using radiation sensitive material diacetylene monomer PCDA, which was a component of the polymerization system. The substrate material, solvent, sensitive material, solution temperature, thickness of film and the preparation method were studied. The dosimeter colour changes from white to blue when exposed 0.1-2.5 Gy, and the linearly dependent coefficient of the exposure response is 0.9998, the stability of absorbency in two weeks after exposure is testified well. It can be used as self-indicating radiation alert personal dosimeter. (authors)

  19. Department of Radiation and Environmental Biology - Overview

    International Nuclear Information System (INIS)

    Cebulska-Wasilewska, A.

    2001-01-01

    Full text: In the year 2000 we completed our study of the genotoxic influence of occupational exposure to pesticides on human cells, and their susceptibility to radiation in particular. Examining blood samples from four countries: Greece, Hungary, Poland and Spain we found that exposure to pesticides usually resulted in an increased susceptibility to the UV-C radiation, although statistical significance could only be concluded for inhabitants of Poland. In Spain, exposure to pesticides was proved to impair the lymphocyte DNA repair capability, while for the Polish group this repair capability appeared enhanced in people exposed to pesticides (see the research reports below). The possible influence of lifestyle or particular diet on the observed national differences would probably be worth analyzing. We also investigate the biological effectiveness of therapeutic beams (neutrons and X-rays). Experimental part of such study, concerning neutrons of different mean energies, is over and the results are now being processed. Our work covers hot issues of environmental and radiation biology making us research partners to many domestic and foreign scientific institutions. Our proficiency in the field is also reflected by membership in various expert boards (e.g. evaluating research applications for the Fifth EU Framework Programme for RTD and Demonstration Activities in the field 'Environment and Health', lecturing in the 2000 NATO IOS Life Science Books). We have entered the 5 th EU Programme Scheme within the EXPAH project starting January 1, 2001. (author)

  20. Nuclear Research Center Karlsruhe, Central Safety Department. Annual report 1992

    International Nuclear Information System (INIS)

    Koelzer, W.

    1993-05-01

    The Central Safety Department is responsible for handling all problems of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The research and development work concentrates on the following aspects: Physical and chemical behavior of trace elements in the environment, biophysics of multicellular systems, behavior of tritium in the air/soil-plant system, improvement in radiation protection measurement and personnel dosimetry. This report gives details of the different duties, indicates the results of 1992 routine tasks and reports about results of investigations and developments of the working groups of the Department. The reader is referred to the English translation of Chapter 1 describing the duties and organization of the Central Safety Department. (orig.) [de

  1. Immune system investigations for radiation workers

    International Nuclear Information System (INIS)

    Obreja, Doina; Tulbure, Rodica; Marinescu, Irina

    2001-01-01

    During the last decade a great deal of attention has been paid to the research in the field of the immune system. Some important steps forward have been achieved in understanding the mechanisms of action and control of the immunologic responses. At the same time the concern for the possible health effects of exposure to ionizing radiation has considerably increased. On the purpose of the evaluation of the modifications induced by the ionizing radiation for radiation workers, we have applied the method of lymphocytic subpopulations, a method that evinces the proportions for the various subtypes of lymphocytes having different roles within the immune system. A number of 62 persons, employees of the Institute of Physics and Nuclear Engineering at Bucharest - Magurele were involved in this study. All radiation workers from 2 departments characterized by a high exposure to ionizing radiation were included, as follows: Group no. 1, consisting of 20 persons working at RWTS (Radioactive Waste Treating Station), thus presenting both external and internal irradiation; Group no. 2, consisting of 18 persons working at RPC (Radioactive Isotopes Preparing Center), a place where besides the radioactive contamination, the chemical risk was also present. The control group (consisting of 24 persons) was formed of employees from the same institute, with the difference that they were not radiation workers. For the statistical processing of the results the programs EPI INFO 6 and CIA were used. Significantly, when analyzing globally the lymphocytic modifications for TT and/or B lymphocytes (either increments or decrements when compared to the normal values), a noticeable statistical difference among the groups in terms of the frequency of the immune system modifications (Hi square test p=0.001) occurs. The results are in accordance to those in special literature mentioning age as a factor having a role in the appearance of the immune modifications. The obtained results indicate a

  2. Annual report 1985 of the KfK Central Safety Department

    International Nuclear Information System (INIS)

    Kiefer, H.; Koelzer, W.; Koenig, L.A.

    1986-04-01

    The Central Safety Department is responsible for handling all problems of radiation protection, safety and security of the institutes and departments of the Karlsruhe Nuclear Research Center, for waste water activity measurements and environmental monitoring of the whole area of the Center, and for research and development work mainly focusing on nuclear safety and radiation protection measures. The r+d work concentrates on the following aspects: physical and chemical behavior of biologically particularly active radionuclides, behavior of HT in the air/plant/soil system, biophysics of multicellular systems, improvement in radiation protection measurement and personnel dosimetry. This report gives details of the different duties, indicates the results of 1985 routine tasks and reports about results of investigations and developments of the working groups of the Department. The reader is referred to the English translation of the Table of Contents and of Chapter 1 describing the duties and organization of the Central Safety Department. (orig./HP) [de

  3. Evaluation of the radiological protection in several departments of nuclear medicine

    International Nuclear Information System (INIS)

    Lopez Bejerano, G.; Jova Sed, L.

    2001-01-01

    For the evaluation of radiation protection, in several departments of nuclear medicine a survey was elaborated and applied that includes mainly: aspects of the licence and compliance with the requirements settled down in this, the program of individual radiological surveillance and their evaluation, functions that it completes the service of radiation protection, training program and the personnel's training, equipment and means of radiation protection, radiological surveillance program of the work areas, characteristics of the installation, radioactive waste management, quality assurance program, relative aspects to radiation protection in the procedures of diagnoses, as well as to pregnant patients and those related with the investigation of accidental medical exposures. The work makes a systematization and discussion of the state of compliance of the radiation protection requirements reflected in the International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources (BSS) and the main recommendations are exposed to achieve in these departments the optimization of the radiation protection. (author)

  4. Investigation of zones with increased ground surface gamma radiation

    International Nuclear Information System (INIS)

    Butkus, D.V.; Morkunas, G.S.; Styro, B.I.

    1989-01-01

    Measurements of the increased gamma radiation zones of soils were conducted in the South-Western part of the Litvinian. The shores of lakes in the north-eastern part of the Suduva high land were investigated. the maximum values of the gamma radiation dose rates were distributed along the lake shores at a distance of 1 m from the water surface, while farther than 1.5 m from it the dose rate was close to the natural value. The increased gamma radiation intensity zones on the ground surface were found only at the northern (Lake Reketija) or the western shore (other lakes under investigation). The highest values of the gamma radiation dose 200-600 μR/h (0.5-1.5 nGy/s) were observed in the comparatively small areas (up to several square metres). The gamma radiation intensity of soil surface increased strongly moving towards the point where the maximum intensity was obsered. 10 figs

  5. TU-G-201-00: Imaging Equipment Specification and Selection in Radiation Oncology Departments

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2015-06-15

    This session will update therapeutic physicists on technological advancements and radiation oncology features of commercial CT, MRI, and PET/CT imaging systems. Also described are physicists’ roles in every stage of equipment selection, purchasing, and operation, including defining specifications, evaluating vendors, making recommendations, and optimal and safe use of imaging equipment in radiation oncology environment. The first presentation defines important terminology of CT and PET/CT followed by a review of latest innovations, such as metal artifact reduction, statistical iterative reconstruction, radiation dose management, tissue classification by dual energy CT and spectral CT, improvement in spatial resolution and sensitivity in PET, and potentials of PET/MR. We will also discuss important technical specifications and items in CT and PET/CT purchasing quotes and their impacts. The second presentation will focus on key components in the request for proposal for a MRI simulator and how to evaluate vendor proposals. MRI safety issues in radiation Oncology, including MRI scanner Zones (4-zone design), will be discussed. Basic MR terminologies, important functionalities, and advanced features, which are relevant to radiation therapy, will be discussed. In the third presentation, justification of imaging systems for radiation oncology, considerations in room design and construction in a RO department, shared use with diagnostic radiology, staffing needs and training, clinical/research use cases and implementation, will be discussed. The emphasis will be on understanding and bridging the differences between diagnostic and radiation oncology installations, building consensus amongst stakeholders for purchase and use, and integrating imaging technologies into the radiation oncology environment. Learning Objectives: Learn the latest innovations of major imaging systems relevant to radiation therapy Be able to describe important technical specifications of CT, MRI

  6. Department of Environmental and Radiation Transport Physics - Overview

    International Nuclear Information System (INIS)

    Woznicka, U.

    2001-01-01

    Full text: We deal with environmental physics and the radiation transport physics, both theoretically and experimentally. Some results find their way to practical applications. Our environmental physics research encompasses hydrogeological problems as well as measurements of trace elements in the atmosphere and in the water. Theoretical (analytical and numerical) and experimental issues of the radiation transport and radiation fields are our main field of research. The interest in radiation transport phenomena is stimulated by their importance for the environmental physics, industrial and nuclear facilities and methods of geophysical. Environmental isotopes and noble gases are used in the investigation of water-bearing geological formations in order to determine the origin and age of groundwater. The papers listed below and three ''Reports on research'' present recent achievements in this field. The gas chromatography methods are used for monitoring the anthropogenic trace gases (SF 6 and freons), which participate in the Earth green-house effect. A very high detection level of SF 6 in water, 0.0028 fg/cm 3 H 2 0, has been reached as required for hydrogeological purposes. A preliminary verification of the SF 6 tracer method for dating young groundwaters by the tritium method has been carried out. We carried on the work on a method of radon measurement in soil in connection with geological conditions. The national seminar ''Radon in Environment'' organized at the INP aroused an interest of Polish scientific centres in that field. The seminar gathered 60 participants who presented 24 oral reports and 8 posters. Within the scope of the radiation transport physics we studied thermal neutron transport in finite hydrogenous media. Advantages and limitations of a Monte Carlo code (MCNP) in thermal neutron transport simulations have been examined by both the analytical solution and the experiment on the INP pulsed neutron generator. An interesting contribution to the

  7. Assessment of patient radiation protection in external radiotherapy departments after inspections performed by the ASN 2008

    International Nuclear Information System (INIS)

    Franchi, Vincent; Marchal, Carole

    2009-10-01

    This report proposes an assessment of patient radiation protection in external radiotherapy. It is based on inter-regional syntheses of inspections performed by the ASN in external radiotherapy departments during 2008. It addresses 6 main themes related to patient radiation protection: human and material resources, organisation of medical physics, training in patient radiation protection, mastering of equipment (maintenance, internal quality controls of medical devices), safety and care quality management (formalization of the patient care process and definition of responsibilities, patient identity control, treatment preparation, and treatment execution), and risk management (a priori risk analysis, declaration, recording and internal processing of dysfunctions, improvements of care quality and safety management system)

  8. Radiation investigations during space flight

    International Nuclear Information System (INIS)

    Akatov, A.Yu.; Nevzgodina, L.V.; Sakovich, V.A.; Fekher, I.; Deme, Sh.; Khashchegan, D.

    1986-01-01

    Results of radiation investigations during ''Salyut-6'' orbital station flight are presented. The program of studying the environmental radioactivity at the station included ''Integral'' and ''Pille'' experiments. In the course of the ''Integral'' experiment absorbed dose distributions of cosmic radiation and heavy charged particle fluence for long time intervals were studied. Method, allowing one to study dose distributions and determine individual doses for any time interval rapidity and directly on board the station was tested in the course of ''Pille'' experiment for the first time. Attention is paid to measuring equipment. Effect of heavy charged particles on the cellular structure of air-dry Lactuca sativa lettuce seeds was studied in the course of radiobiological experiments conducted at ''Salyut-6'' station. It is shown, that with the increase of flight duration the frequency of cells with chromosomal aberrations increases

  9. The analysis of radiation exposure of hospital radiation workers

    International Nuclear Information System (INIS)

    Jeong, Tae Sik; Shin, Byung Chul; Moon, Chang Woo; Cho, Yeong Duk; Lee, Yong Hwan; Yum, Ha Yong

    2000-01-01

    This investigation was performed in order to improve the health care of radiation workers, to predict a risk, to minimize the radiation exposure hazard to them and for them to realize radiation exposure danger when they work in radiation area in hospital. The documentations checked regularly for personal radiation exposure in four university hospitals in Pusan city in Korea between January 1, 1993 and December 31, 1997 were analyz ed. There were 458 persons in this documented but 111 persons who worked less then one year were excluded and only 347 persons were included in this study. The average of yearly radiation exposure of 347 persons was 1.52±1.35 mSv. Though it was less than 5OmSv, the limitaion of radiation in law but 125 (36%) people received higher radiation exposure than non-radiation workers. Radiation workers under 30 year old have received radiation exposure of mean 1.87±1.01 mSv/year, mean 1.22±0.69 mSv between 31 and 40 year old and mean 0.97±0.43 mSv/year over, 41year old (p<0.001). Men received mean 1.67±1.54 mSv/year were higher than women who received mean 1.13±0.61 mSv/year (p<0.01). Radiation exposure in the department of nuclear medicine department in spite of low energy sources is higher than other departments that use radiations in hospital (p<0.05). And the workers who received mean 3.69±1.81 mSv/year in parts of management of radiation sources and injection of sources to patient receive high radiation exposure in nuclear medicine department (0<0.01). In department of diagnostic radiology high radiation exposure is in barium enema rooms where workers received mean 3.74±1.74 mSv/year and other parts where they all use fluoroscopy such as angiography room of mean 1.17±0.35 mSv/year and upper gastrointestinal room of mean 1.74±1.34 mSv/year represented higher radiation exposure than average radiation exposure in diagnostic radiology (p<0.01). Doctors and radiation technologists received higher radiation exposure of each mean 1.75±1

  10. Radiation Dosimetry Management: Quality Assurance and Investigations

    International Nuclear Information System (INIS)

    Perle, S.

    2001-01-01

    Full text: In a litigation-prone society, it is prudent for any business to evaluate its potential exposure to legal action, initiated by either an employee or a member of the general public. This potential is exacerbated when the phobia of radiation exposure and radioactive materials is interjected into the equation. This phobia is fuelled by the perceived risks of radiation exposure, be they fact or fantasy. With the current cancer incidence rate being approximately 1 in every 2.5 individuals (for all types of cancer), it is imperative that all facilities take a proactive look at their business vulnerability. When radiation exposure is the issue, records documentation is a critical factor, and a significant amount of effort should be expended to implement a comprehensive records management system. A comprehensive Radiation Dosimetry Management Program is essential if a business is going to mitigate any regulatory or legal intervention. This lecture will address appropriate Records Quality Assurance, and, the appropriate requirements for investigations of dosimetry results. (author)

  11. Occupational exposure at the Department of Nuclear Medicine as a work environment: A 19-year follow-up

    OpenAIRE

    Piwowarska-Bilska, Hanna; Birkenfeld, Bożena; Gwardyś, Aleksandra; Supińska, Aleksandra; Listewnik, Maria H.; Elbl, Bogumiła; Cichoń-Bańkowska, Katarzyna

    2011-01-01

    Summary Background: This study assessed the radiation safety at Nuclear Medicine Department being a work environment. Ionizing radiation exposure of the employees in the last 19 years and the effects of legislative changes in radiological protection were analyzed. Material/Methods: All employees of the investigated department were regularly and individually monitored using chest badges equipped with Kodak film type 2. Overall, 629 annual doses of the employees of nuclear medicine department, ...

  12. Optimization (ALARA) of radiation protection at Department of Energy facilities

    International Nuclear Information System (INIS)

    Weadock, A.A.; Jones, C.R.

    1992-01-01

    Maintaining worker and public exposures As Low As Reasonably Achievable (ALARA) is a key objective of the Department of Energy (DOE). Responsibility for occupational ALARA program policy and guidance resides within the DOE Office of Health. Current Office of Health initiatives related to ALARA include the development of additional regulatory guidance related to ALARA program implementation at DOE contractor facilities, the review of ALARA program status at various facilities and the production of technical reports summarizing this status, and the support of various mechanisms to improve communication among the DOE ALARA community. The Office of Health also monitors revisions to radiogenic risk estimates and radiation protection recommendations to evaluate adequacy of current DOE limits and impacts of potentially revised limits. (author)

  13. Department of Training and Consulting - Overview

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    2010-01-01

    more talented youth. The Department participates actively in Science Festivals and Picnics for the general public. In 2010, our team was present during the Science Festivals in Warsaw and Rzeszow. In all these events, in addition to the series of lectures, many simple demonstrations of the properties of nuclear radiation as well as a simulator of a nuclear reactor control were presented. The Department also took part and gave demonstrations during the annual Science Picnic in Warsaw. In addition to outreach activity, physicists in the Department are involved in investigations of solid-state properties, and in the influence of ionizing radiation on humans. (author)

  14. Investigating Radiation Shielding Properties of Different Mineral Origin Heavyweight Concretes

    Science.gov (United States)

    Basyigit, Celalettin; Uysal, Volkan; Kilinçarslan, Şemsettin; Mavi, Betül; Günoǧlu, Kadir; Akkurt, Iskender; Akkaş, Ayşe

    2011-12-01

    The radiation although has hazardous effects for human health, developing technologies bring lots of usage fields to radiation like in medicine and nuclear power station buildings. In this case protecting from undesirable radiation is a necessity for human health. Heavyweight concrete is one of the most important materials used in where radiation should be shielded, like those areas. In this study, used heavyweight aggregates of different mineral origin (Limonite, Siderite), in order to prepare different series in concrete mixtures and investigated radiation shielding properties. The experimental results on measuring the radiation shielding, the heavyweight concrete prepared with heavyweight aggregates of different mineral origin show that, are useful radiation absorbents when they used in concrete mixtures.

  15. Investigating Radiation Shielding Properties of Different Mineral Origin Heavyweight Concretes

    International Nuclear Information System (INIS)

    Basyigit, Celalettin; Uysal, Volkan; Kilincarslan, Semsettin; Akkas, Ayse; Mavi, Betuel; Guenoglu, Kadir; Akkurt, Iskender

    2011-01-01

    The radiation although has hazardous effects for human health, developing technologies bring lots of usage fields to radiation like in medicine and nuclear power station buildings. In this case protecting from undesirable radiation is a necessity for human health. Heavyweight concrete is one of the most important materials used in where radiation should be shielded, like those areas. In this study, used heavyweight aggregates of different mineral origin (Limonite, Siderite), in order to prepare different series in concrete mixtures and investigated radiation shielding properties. The experimental results on measuring the radiation shielding, the heavyweight concrete prepared with heavyweight aggregates of different mineral origin show that, are useful radiation absorbents when they used in concrete mixtures.

  16. Radiation Protection and Civil defence Department

    International Nuclear Information System (INIS)

    Gomaa, M.A.; Elshinawy, R.M.K.; Abdelfattah, A.T.

    1991-01-01

    This conference involves subjects of radiation protection, programming of civil defence, on the implementation of 1990 ICRP recommendation, thermoluminescence properties of bone equivalent calcium phosphate ceramics, potassium body burdens in occupational users of egyptian nuclear research centre, transport of radionuclides in fresh water stream, water treatment process for nuclear reactor, research activities related to internal contamination and bioassay and experience and environmental radiation monitoring in inshass. it contains of figures and tables

  17. Assessment of medical radiation exposure to patients and ambient doses in several diagnostic radiology departments

    Science.gov (United States)

    Sulieman, A.; Elhadi, T.; Babikir, E.; Alkhorayef, M.; Alnaaimi, M.; Alduaij, M.; Bradley, D. A.

    2017-11-01

    In many countries diagnostic medical exposures typically account for a very large fraction of the collective effective dose that can be assigned to anthropological sources and activities. This in part flags up the question of whether sufficient steps are being taken in regard to potential dose saving from such medical services. As a first step, one needs to survey doses to compare against those of best practice. The present study has sought evaluation of the radiation protection status and patient doses for certain key radiological procedures in four film-based radiology departments within Sudan. The radiation exposure survey, carried out using a survey meter and quality control test tools, involved a total of 299 patients their examinations being carried out at one or other of these four departments. The entrance surface air kerma (ESAK) was determined from exposure settings using DosCal software and an Unfors -Xi-meter. The mean ESAK for x-ray examination of the chest was 0.30±0.1 mGy, for the skull it was 0.96±0.7 mGy, for the abdomen 0.85±0.01 mGy, for spinal procedures 1.30±0.6 mGy and for procedures involving the limbs it was 0.43±0.3 mGy. Ambient dose-rates in the reception area, at the closed door of the x-ray room, recorded instantaneous values of up to 100 μSv/h. In regard to protection, the associated levels were found to be acceptable in three of the four departments, corrective action being required for one department, regular quality control also being recommended.

  18. A Radiation Homeland Security Workshop Presented to the City of Berkeley Fire Department

    Science.gov (United States)

    Matis, Howard

    2005-04-01

    A radiation incident in a community, ranging from a transportation accident to a dirty bomb, is expected to be rare, but still can occur. First responders to such an incident must be prepared. City of Berkeley officials met with members of the Lawrence Berkeley National Laboratory staff and agreed that the laboratory participants would create material and teach it to all of their fire fighting staff. To design such a course, nuclear physicists, biologists and health physicists merged some of their existing teaching material together with previous homeland security efforts to produce a course that lasted one full day. The material was designed to help alleviate the myths and fear of radiation experienced by many first responders. It included basic nuclear physics information, biological effects, and methods that health physicists use to detect and handle radiation. The curriculum included several hands on activities which involved working directly with the meters the Berkeley Fire Department possessed. In addition, I will discuss some observations from teaching this course material plus some unusual problems that we encountered, such as suddenly the whole class responding to a fire.

  19. 28 CFR 16.132 - Exemption of Department of Justice System-Personnel Investigation and Security Clearance Records...

    Science.gov (United States)

    2010-07-01

    ... System—Personnel Investigation and Security Clearance Records for the Department of Justice (DOJ), DOJ... 28 Judicial Administration 1 2010-07-01 2010-07-01 false Exemption of Department of Justice System-Personnel Investigation and Security Clearance Records for the Department of Justice (DOJ), DOJ-006. 16.132...

  20. Investigation of ionizing radiation effect on albumin aqueous solutions

    International Nuclear Information System (INIS)

    Sizikov, A.M.; Adeeva, L.N.; Ogryzkova, I.F.

    1986-01-01

    Gamma radiation effect on 0.1-0.5%-albumin aqueous solutions has been investigated; variations of viscosity and optical density of solutions at pH medium different values and completeness of protein separation owing to radiation coagulation have been determined. It is shown that due to radiation coagulation it is possible to quantitatively separate albumin from irradiated aqueous solutions. The albumin coagulation is caused by OH radicals the action of which on albumin macromolecules results in destruction of intramolecular bonds and albumin conformation transformations

  1. Investigation of gamma-ray fingerprint identifying mechanism for the types of radiation sources

    CERN Document Server

    Liu Su Ping; Gu Dang Chang; Gong-Jian; Hao Fan Hua; Hu Guang Chun

    2002-01-01

    Radiation fingerprints sometimes can be used to label and identify the radiation resources. For instance, in a future nuclear reduction treaty that requires verification of irreversible dismantling of reduced nuclear warheads, the radiation fingerprints of nuclear warheads are expected to play a key role in labelling and identifying the reduced warheads. It would promote the development of nuclear warheads deep-cuts verification technologies if authors start right now some investigations on the issues related to the radiation fingerprints. The author dedicated to the investigation of gamma-ray fingerprint identifying mechanism for the types of radiation resources. The purpose of the identifying mechanism investigation is to find a credible way to tell whether any two gamma-ray spectral fingerprints that are under comparison are radiated from the same resource. The authors created the spectrum pattern comparison (SPC) to study the comparability of the two radiation fingerprints. Guided by the principle of SPC,...

  2. Equivalent doses of ionizing radiation received by medical staff at a nuclear medicine department

    International Nuclear Information System (INIS)

    Dziuk, E.; Kowalczyk, A.; Siekierzynski, M.; Jazwinski, J.; Chas, J.; Janiak, M.K.; Palijczuk, D.

    2002-01-01

    Aim: Total annual activity of I-131 used for the treatment of thyroid disorders at the Dept.of Nuclear Medicine, Central Clinical Hospital, Military University School of Medicine, in Warsaw, Poland, equal to 190 GBq; at the same time, total activity of Tc-99m utilized at the same Department for diagnostic purposes reached 1 TBq. As estimated from the radiometer readings, in extreme cases the equivalent at a couple of measurement points at this Department may exceed 200 mSv per year. Thus, in the present study we aimed to assess the potential risk of the exposure of medical personnel of the Department to ionizing radiation. Material and Methods: Polymethacrylate cases each housing four thermoluminescent dosimeters were continuously worn for one year by the nurses and doctors with the dosimeters being replaced by the new ones every three months. In addition, cases containing thermoluminescent dosimeters (three dosimeters per case) were placed in 20 different measurement points across the Department and the monitoring of the doses was carried out continuously for more than six years (from May 1995 to March 2002). Based on the quarterly readings of the dosimeters, equivalent doses were calculated for both the members of the personnel and the measurement space points. Results: The doses registered in the patient rooms ranged 5 to 90 mSv x y -1 , in the application room 10 to 15 mSv x y -1 , in the laboratory rooms 1.5 to 30 mSv x y -1 , and in the waiting room 2 to 6 mSv x y -1 ; no increment above the background level was detected in the nurses' station. Accordingly, the annual doses calculated from the dosimeters worn by the staff ranged 0.2 to 1.1 mSv x y -1 ; these latter findings were confirmed by direct readings from individual film dosimeters additionally worn by the staff members. Conclusion: The obtained results indicate that it is unlikely for the personnel of the monitored Nuclear Medicine Department to receive doses of radiation exceeding 40% of the annual

  3. Investigation of Radiation Protection Methodologies for Radiation Therapy Shielding Using Monte Carlo Simulation and Measurement

    Science.gov (United States)

    Tanny, Sean

    The advent of high-energy linear accelerators for dedicated medical use in the 1950's by Henry Kaplan and the Stanford University physics department began a revolution in radiation oncology. Today, linear accelerators are the standard of care for modern radiation therapy and can generate high-energy beams that can produce tens of Gy per minute at isocenter. This creates a need for a large amount of shielding material to properly protect members of the public and hospital staff. Standardized vault designs and guidance on shielding properties of various materials are provided by the National Council on Radiation Protection (NCRP) Report 151. However, physicists are seeking ways to minimize the footprint and volume of shielding material needed which leads to the use of non-standard vault configurations and less-studied materials, such as high-density concrete. The University of Toledo Dana Cancer Center has utilized both of these methods to minimize the cost and spatial footprint of the requisite radiation shielding. To ensure a safe work environment, computer simulations were performed to verify the attenuation properties and shielding workloads produced by a variety of situations where standard recommendations and guidance documents were insufficient. This project studies two areas of concern that are not addressed by NCRP 151, the radiation shielding workload for the vault door with a non-standard design, and the attenuation properties of high-density concrete for both photon and neutron radiation. Simulations have been performed using a Monte-Carlo code produced by the Los Alamos National Lab (LANL), Monte Carlo Neutrons, Photons 5 (MCNP5). Measurements have been performed using a shielding test port designed into the maze of the Varian Edge treatment vault.

  4. Department of Radiation and Environmental Biology - Overview

    International Nuclear Information System (INIS)

    Cebulska-Wasilewska, A.

    1999-01-01

    californium 252 neutrons from KAERI source. The third part of our effort concerns an application of different radiation sources for clinical cancer therapy. In cooperation with dr Jacek Capala we have done experiments on Medical Research Reactor in Brookhaven Laboratory. We have also introduced a COMET assay in their laboratory. This is an excellent feeling when both cooperating sides may benefit from co-operation. The year 1998 was also very attractive in the sense of many interesting visits to our Department. All of them we enjoyed a lot. We were honored to host Dr Diana Anderson from BIBRA International, Carshalton, UK. We are happy to see that her visits have become a tradition so much profitable for both our friendship and programs. The end of the year was equally touching as the beginning when X-ray machine had arrived, at the beginning of December, I won myself, a prize from the International Mutagenesis Society for the outstanding presentation; on the 3rd International Conference of Mutagenesis in Human Populations. I really respect both, working issue of the Conference ''Understanding Gene and Environmental Interactions for Disease Prevention'' and a prize itself (Five-year-subscription of International Journal of Environmental and Molecular Mutagenesis). Whoop! I am proud of myself and of the people in my Department!!. (author)

  5. Investigation research on improvement of safe handling techniques of radiation in medical fields; Reduction of exposure to medical radiation

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, Minoru; Watabe, Makoto; Oono, Kuniko [Tokyo Metropolitan Isotope Research Center (Japan)

    1990-01-01

    Today, it is generally recognized that radiation exposure regardless of its use should be limited to the required minimum. The form of radiation utilization for medical treatment is extremely diverse, and to clarify the actual state of dose that doctors, radiation technicians, nurses and subjects as patients receive by the diagnosis and treatment accompanied by radiation exposure is not only indispensable for evaluating the risk they receive, but also to give the important data for pursuing the reduction of radiation exposure dose of those engaging in medical treatment and patients-subjects. In this investigation research, the actual state of radiation exposure in doctors, radiation technicians, nurses and patients or subjects was investigated, and the radiation exposure dose was measured, in this way the reduction of radiation exposure dose was attempted. The radiation exposure dose in one month was 10.8{+-}3.0 mrem in doctors, 10.4{+-}2.5 mrem in radiation technicians, and 6.3{+-}2.5 mrem in nurses. The risk coefficient in a specific medical university was 1155 men-rem. Also the case of nuclear medical diagnosis administering Ga-67 was measured. (K.I.).

  6. Evaluation of radiation protection in conventional x-ray departments in diagnostic radiography (Kartoum City)

    International Nuclear Information System (INIS)

    Elhussien, Nuha Yousif Osman

    2016-08-01

    This study was conducted in a number of governmental and private hospitals in the city of Khartoum in order to evalute radiation protection in conventional X-ray departments. The number of governmental hospitals was and 4 private 69% and 31&, respectivly, and the number of X-rays rooms that have been evaluted was 19, 15 gvernmental and private by rate of 79% and 21% respectively. And found that many of the hospitals fullfilled the requirements of radiation protection, also we have been observed that all radiology rooms are built well, but their control rooms was mostly not fulfilled the requirements of radiation protection due to either were not build inclimed to reflect the scattered radiation due to either they were not build inclimed to reflect the scattered radiation from the patient or their size was small that not enable workers to exerciese their work safely, as well as some height less than recommended by the competent authorities. Also found that most hospitals have lead aprons axcept three, but some they are old that means do not protect against radiation due they were broke or not put it in the that means do not protect against radiation due they were broke or not put it in the right way. Even the good ares not used by most of the technician and co-patients. All the hoapitals have not the following radiation tools (thyroid collar, lead glasses, lead gloves. TLDs, and gonad shields). The scattered radiation (leakage) was evaluted in the control room, the door of the control room, the dark room, behind chest stand, staff office, and the waiting area. We found that the higher readings in the door of the control rooms (<10 μSv/hr) in the five control rooms from 19, also the readings exceeded the limits in three hospitals in control rooms 13 rooms. And also the readings exceeded the limits in two hospitals in the staff office, and the waiting area. (Author)

  7. Study of radiation protection at the Department of Radiology and Toxicology, Faculty of Health and Social Studies of University of South Bohemia

    International Nuclear Information System (INIS)

    Singer, J.; Kuna, P.

    2005-01-01

    In this paper authors deals with study of radiation protection at the Department of Radiology and Toxicology, Faculty of Health and Social Studies of University of South Bohemia. This department providing awareness of the concept of radiation protection in persons of different professions, who will come into contact with ionizing radiation sources. These are e.g. specialists in health services, employees in defectoscopy and industry, members of police and fire fighting services, etc. For these persons, the Department of Radiology and Toxicology was established at the Faculty of Health and Social Studies of University of South Bohemia that offer their relevant education in theory and practice of radiation problems that are accredited in following direction: bachelor study in Applied radiobiology and toxicology; bachelor study in Biophysics and medical techniques; and master study in Crisis radiobiology and toxicology. These specified subjects are arranged in such a way that the student can be introduced into the teaching text based on the concept and history of relevant problems, for example: radiation physics, ionizing radiation dosimetry, clinical dosimetry. In accordance with a survey implemented in the field of health services it was found that there is a lack of people with technical education in the field of radiation at the level of Bachelors. These requirements are most properly adhered to by the specialty 'Radiological Technician' that is currently being planned at the Faculty of Health and Social Studies and that will be subjected to the accreditation process. The specialty 'Radiological Assistant' was formerly accredited at the faculty, whose activity is different from that of the 'Radiological Technician', as defined by Law of the Czech Republic No. 96/2004 Sb

  8. Hollow-duct radiation delivery system investigation

    Directory of Open Access Journals (Sweden)

    Kramer D.

    2013-05-01

    Full Text Available Investigation of hollow-duct structure for high-power laser-diode-array radiation delivery into the end-pumped large-aperture gain media is reported. A ray tracing method has been used to evaluate the performance of the structure designed for maximum transmission efficiency and output beam profile homogeneity. Variable hollow-duct lengths as well as emanating angles of laser-diode-array have been taken into account.

  9. DMF-T index in patients undergoing radiation therapy with LINAC X-ray radiation for head and neck cancer at Department of Radiotherapy, Dr. Hasan Sadikin Hospital

    Directory of Open Access Journals (Sweden)

    S. Sabrina

    2007-11-01

    Full Text Available Radiation therapy for head and neck cancer frequently caused severe salivary gland dysfunction. The salivary gland dysfunction possibly decreased the protective function of saliva and caused dental caries. The purpose of this study was to obtain an illustration about DMF-T index in patient undergoing radiation therapy with LINAC X-ray radiation for head and neck cancer at Department of Radiotherapy, Dr. Hasan Sadikin Hospital in January-February 2007. The study was a simple descriptive. The study was conducted on 7 males and 9 females undergoing radiation therapy with LINAC X-ray radiation for head and neck cancer. The ages of patient are between 37 years and 77 years. The severity of caries was measured by DMF-T index. DMF-T index in 16 patient undergoing radiation therapy with LINAC X-ray radiation for head and neck cancer at Dr. Hasan Sadikin Hospital is 10.6 as the result of this study. The conclusion of this study showed that the DMF-T index in 16 patient undergoing radiation therapy with LINAC X-ray radiation for head and neck cancer at Dr. Hasan Sadikin Hospital had very high grade based on WHO classification, which the value was over 6.6.

  10. Department of Environmental and Radiation Transport Physics - Overview

    International Nuclear Information System (INIS)

    Woznicka, U.

    2002-01-01

    The scientific activity of the Department in 2001 can be summarised as follows. In the Environmental Physics Laboratory gas chromatography methods are being developed mainly for atmospheric investigations and hydrological applications. A method for measuring the SF 6 contents in water for determining the age of young groundwaters is well advanced. Reconnaissance measurements performed in two aquifers yielded a reasonable agreement with the ages obtained from the tritium method. A proper determination of trace gases dissolved in water requires the measurement of the so-called ''excess air'' resulting from the excessive dissolution of air bubbles at the groundwater table. For this purpose, a new method of analysing the concentrations of argon and neon in water was developed. The separation of argon from oxygen in gas samples, extracted from water, carried out with the help of the catalyst of NiO type. Neon is determined with the aid of a pulse discharge helium detector (type PI-2D, VALCO Ltd) doped with neon. The initial results are promising. Atmospheric investigations were continued by measurements of the concentrations of F-11, F-12, F-113, CHCl 3 , CHCCl 3 , CCl 4 , and SF 6 in the Cracow area. Incidentally, high concentrations of SF 6 are observed. The air flow trajectories available in the BADC Trajectory Service (http://cirrus.badc.rl.ac.uk/trajectory/) were used in an attempt to identify the emission source of these high SF 6 concentrations. So far only the north-west direction was identified. Hydrogeological investigations of the origin and ages of different interesting groundwater systems by environmental isotope methods were also continued, and the origin of chemically unique mineral water in Krynica Spa has been identified as related to dehydration of clay minerals in burial diagenesis. The Natural Radioactivity Laboratory has been involved in interdisciplinary projects on the measurements of radon concentration in soil gas in areas of different

  11. Ambient radiation dose reduction within a newly remodeled Nuclear Medicine Department

    International Nuclear Information System (INIS)

    Lai, Y.C.; Chen, Y.W.; Huang, Y.F.

    2008-01-01

    Full text: Ambient radiation levels at the patient waiting areas have been greatly reduced after remodeling of our Nuclear Medicine Department (NMD) based on the ALARA consideration. Complete ambient radiation monitoring of our NMD before remodeling had been characterized and published earlier by the same authors elsewhere. The NMD outpatients, with an initial dose of up to 740 MBq (20 mCi) per case, may wait around and incidentally congest in one place that could cause an unexpected higher exposure level in public access areas. In this new surveillance study after remodeling, the ambient radiation time-profile, peak dose rates and daily doses have been re-evaluated by using high sensitivity, digital survey dosimeters. As a preliminary result, with our newly improved facility in operation, we have demonstrated the NMD waiting room average daily dose has dropped from about 3.0 μSv to 0.42 μSv during most of busy days in comparison. The hourly peak dose rate detected in patient waiting areas has also reduced to a factor of more than two, from maximum dose rate of 40.4 μSv/h to 15.4 μSv/h, during one worst case scenario. The great reduction of the environment dose was achieved mainly by using larger room space with thicker lead wall, from previous 2-mm to new 5-mm in lead thickness, and by increasing patient waiting rooms/areas with less chairs available in each seating location. Other NMD administrative control measure of our dose reduction program has also been emphasized in better patient routing, scheduling and less waiting time for the diagnostic patients. (author)

  12. Effects of a radiation dose reduction strategy for computed tomography in severely injured trauma patients in the emergency department: an observational study.

    Science.gov (United States)

    Kim, Soo Hyun; Jung, Seung Eun; Oh, Sang Hoon; Park, Kyu Nam; Youn, Chun Song

    2011-11-03

    Severely injured trauma patients are exposed to clinically significant radiation doses from computed tomography (CT) imaging in the emergency department. Moreover, this radiation exposure is associated with an increased risk of cancer. The purpose of this study was to determine some effects of a radiation dose reduction strategy for CT in severely injured trauma patients in the emergency department. We implemented the radiation dose reduction strategy in May 2009. A prospective observational study design was used to collect data from patients who met the inclusion criteria during this one year study (intervention group) from May 2009 to April 2010. The prospective data were compared with data collected retrospectively for one year prior to the implementation of the radiation dose reduction strategy (control group). By comparison of the cumulative effective dose and the number of CT examinations in the two groups, we evaluated effects of a radiation dose reduction strategy. All the patients met the institutional adult trauma team activation criteria. The radiation doses calculated by the CT scanner were converted to effective doses by multiplication by a conversion coefficient. A total of 118 patients were included in this study. Among them, 33 were admitted before May 2009 (control group), and 85 were admitted after May 2009 (intervention group). There were no significant differences between the two groups regarding baseline characteristics, such as injury severity and mortality. Additionally, there was no difference between the two groups in the mean number of total CT examinations per patient (4.8 vs. 4.5, respectively; p = 0.227). However, the mean effective dose of the total CT examinations per patient significantly decreased from 78.71 mSv to 29.50 mSv (p trauma patients effectively decreased the cumulative effective dose of the total CT examinations in the emergency department. But not effectively decreased the number of CT examinations.

  13. Investigation of radiation defects in solids using the EXAFS method

    International Nuclear Information System (INIS)

    Eritsyan, G.N.

    1983-01-01

    The exafs method is proposed as a more informative, universal one to investigate the radiation defects in solids. The successful results as obtained by the author using the synchrotron radiation source are reported for the first time. The measurements were carried out in GaAsP crystals irradiated with 50 MeV electrons

  14. Clinical Investigation of Radiation Retinopathy Fundus and Fluorescein Angiographic Features

    Institute of Scientific and Technical Information of China (English)

    LiMei; QiuGT

    1999-01-01

    Purpose:To investigate the fundus and fluorescein angiographic features in the patients with radiation retinopathy.Clinical Materials:Color fundus photography and/or fluorescein angiography from 13 patients with nasopharyngeal carcinomas received external beam radiation were retrospectively analyzed.Reslts:In this study,26 damaged eyes of 13 patients eveloped some degree of radiation retinopathy.The earliest and most common finding was macular microvascular changes (microaneurysms and/or telangiectasia),which was observed in 100%(26/26)of the eyes.Intraretinal hemorrhages,macular capillary nonperfusion,and macular edema were noted in 84%,50%,and 42% of the eyes,respectively.Conclusions:Radiation retinopathy is common after external beam radiation of nasopharyngeal carcinomas.The prominent changes include maular microvascular changes,intraretinal hemorrhages and macular capillary nonperfusion.

  15. Journey Toward High Reliability: A Comprehensive Safety Program to Improve Quality of Care and Safety Culture in a Large, Multisite Radiation Oncology Department.

    Science.gov (United States)

    Woodhouse, Kristina Demas; Volz, Edna; Maity, Amit; Gabriel, Peter E; Solberg, Timothy D; Bergendahl, Howard W; Hahn, Stephen M

    2016-05-01

    High-reliability organizations (HROs) focus on continuous identification and improvement of safety issues. We sought to advance a large, multisite radiation oncology department toward high reliability through the implementation of a comprehensive safety culture (SC) program at the University of Pennsylvania Department of Radiation Oncology. In 2011, with guidance from safety literature and experts in HROs, we designed an SC framework to reduce radiation errors. All state-reported medical events (SRMEs) from 2009 to 2016 were retrospectively reviewed and plotted on a control chart. Changes in SC grade were assessed using the Agency for Healthcare Research and Quality Hospital Survey. Outcomes measured included the number of radiation treatment fractions and days between SRMEs, as well as SC grade. Multifaceted safety initiatives were implemented at our main academic center and across all network sites. Postintervention results demonstrate increased staff fundamental safety knowledge, enhanced peer review with an electronic system, and special cause variation of SRMEs on control chart analysis. From 2009 to 2016, the number of days and fractions between SRMEs significantly increased, from a mean of 174 to 541 days (P safety framework. Our multifaceted initiatives, focusing on culture and system changes, can be successfully implemented in a large academic radiation oncology department to yield measurable improvements in SC and outcomes. Copyright © 2016 by American Society of Clinical Oncology.

  16. RCRA Facility Investigation/Remedial Investigation Report with Baseline Risk Assessment for the Fire Department Hose Training Facility (904-113G)

    Energy Technology Data Exchange (ETDEWEB)

    Palmer, E. [Westinghouse Savannah River Company, AIKEN, SC (United States)

    1997-04-01

    This report documents the Resource Conservation and Recovery Act (RCRA) Facility Investigation/Remedial Investigation/Baseline Risk Assessment (RFI/RI/BRA) for the Fire Department Hose Training Facility (FDTF) (904-113G).

  17. Evaluation of radiation protection in nuclear medicine diagnostic procedures

    International Nuclear Information System (INIS)

    Mohammed, Ezzeldien Mohammed Nour

    2013-05-01

    This study conducted to evaluate the radiation protection in nuclear medicine diagnostic procedures in four nuclear medicine departments in Sudan. The evaluated procedures followed in these departments were in accordance with the standards, International Recommendations and code of practice for radiation protection in nuclear medicine. The evolution included the optimum design for diagnostic nuclear medicine departments, dealing with radioactive sources, quality assurance and quality control, training and responsibilities for radiation worker taking into account economic factors in Sudan. Evaluation of radiation protection procedures in diagnostic investigations was carried out by taken direct measurements of dose rate and the contamination level in some areas where radiation sources, radiation workers and public are involved. Designated questionnaires covered thirteen areas of radiation protection based on inspection check list for nuclear medicine prepared by the International Atomic Energy Agency (IAEA) and American Association of Physicist in Medicine (AAPM) were used in the evaluation. This questionnaire has been Filled by Radiation Protection Officer (RPO), nuclear medicine technologist, nuclear medicine specialist in the nuclear medicine departments. Four hospitals, two governmental hospital and two private hospitals, have been assisted, the assessment shows that although the diagnostic nuclear medicine department in Sudan are not applying a fully safety and radiation protection procedures, but the level of radiation dose and the contamination level were found within acceptable limits. The private hospital D scored the higher level of protection (85.25%) while the governmental hospital C scored the lower level of protection (59.02%). Finally, this study stated some recommendations that if implemented could improve the level of radiation protection in nuclear medicine department. One of the most important recommendations is that a proper radiation protection

  18. U.S. Department of Energy Workers' mental models of radiation and chemical hazards in the workplace

    International Nuclear Information System (INIS)

    Quadrel, M.J.; Blanchard, K.A.; Lundgren, R.E.; McMakin, A.H.; Mosley, M.T.; Strom, D.J.

    1994-05-01

    A pilot study was performed to test the mental models methodology regarding knowledge and perceptions of U.S. Department of Energy contractor radiation workers about ionizing radiation and hazardous chemicals. The mental models methodology establishes a target population's beliefs about risks and compares them with current scientific knowledge. The ultimate intent is to develop risk communication guidelines that address information gaps or misperceptions that could affect decisions and behavior. In this study, 15 radiation workers from the Hanford Site in Washington State were interviewed about radiation exposure processes and effects. Their beliefs were mapped onto a science model of the same topics to see where differences occurred. In general, workers' mental models covered many of the high-level parts of the science model but did not have the same level of detail. The following concepts appeared to be well understood by most interviewees: types, form, and properties of workplace radiation; administrative and physical controls to reduce radiation exposure risk; and the relationship of dose and effects. However, several concepts were rarely mentioned by most interviewees, indicating potential gaps in worker understanding. Most workers did not discuss the wide range of measures for neutralizing or decontaminating individuals following internal contamination. Few noted specific ways of measuring dose or factors that affect dose. Few mentioned the range of possible effects, including genetic effects, birth defects, or high dose effects. Variables that influence potential effects were rarely discussed. Workers rarely mentioned how basic radiation principles influenced the source, type, or mitigation of radiation risk in the workplace

  19. Annual Progress Report FY 93 (Walter Reed Army Medical Center, Department of Clinical Investigation). Clinical Investigation Program. Volume 2

    Science.gov (United States)

    1993-01-01

    129 REPORT DATE: 03/04/93 WORK UNIT a 1332-91 DETAIL SUMMARY SHEET TITLE: Thermogenic Agent Promotion of Weight Loss in Obese Soldiers KEYWORDS...thermogenic, promotion, obese PRINCIPAL INVESTIGATOR: Solomon, Barbara DNSc DEPARTMENT: Department of Medicine STATUS: Completed SERVICE: Endocrine...are: possible variance between adult and chilhood forms of HD, patterns of previous infectious disease exposure, socioeconomic patterns, familial

  20. Effects of a radiation dose reduction strategy for computed tomography in severely injured trauma patients in the emergency department: an observational study

    Directory of Open Access Journals (Sweden)

    Kim Soo Hyun

    2011-11-01

    Full Text Available Abstract Background Severely injured trauma patients are exposed to clinically significant radiation doses from computed tomography (CT imaging in the emergency department. Moreover, this radiation exposure is associated with an increased risk of cancer. The purpose of this study was to determine some effects of a radiation dose reduction strategy for CT in severely injured trauma patients in the emergency department. Methods We implemented the radiation dose reduction strategy in May 2009. A prospective observational study design was used to collect data from patients who met the inclusion criteria during this one year study (intervention group from May 2009 to April 2010. The prospective data were compared with data collected retrospectively for one year prior to the implementation of the radiation dose reduction strategy (control group. By comparison of the cumulative effective dose and the number of CT examinations in the two groups, we evaluated effects of a radiation dose reduction strategy. All the patients met the institutional adult trauma team activation criteria. The radiation doses calculated by the CT scanner were converted to effective doses by multiplication by a conversion coefficient. Results A total of 118 patients were included in this study. Among them, 33 were admitted before May 2009 (control group, and 85 were admitted after May 2009 (intervention group. There were no significant differences between the two groups regarding baseline characteristics, such as injury severity and mortality. Additionally, there was no difference between the two groups in the mean number of total CT examinations per patient (4.8 vs. 4.5, respectively; p = 0.227. However, the mean effective dose of the total CT examinations per patient significantly decreased from 78.71 mSv to 29.50 mSv (p Conclusions The radiation dose reduction strategy for CT in severely injured trauma patients effectively decreased the cumulative effective dose of the total

  1. Results of the evaluation of the radiation protection in several nuclear medicine departments and recommendations for its optimization; Resultados de la evaluacion de la proteccion radiologica en varios departamentos de medicina nuclear y recomendaciones para su optimizacion

    Energy Technology Data Exchange (ETDEWEB)

    Bejerano, Gladys Lopez; Jova Sed, Luis; Diaz, Efren [Centro de Proteccion y Higiene de las Radiaciones, La Habana (Cuba)]. E-mail: gladys@cphr.edu.cu; jova@cphr.edu.cu [and others

    2001-07-01

    For the evaluation of the radiological safety in several Nuclear Medicine departments a survey was processed and applied that gathers the related mainly to: aspect of the licensing and fulfillment of the establish in this, the program of individual radiologic monitoring and his evaluation, functions that serve to the radiologic protection system, program of qualification and training of the personnel, equipment and mean of radiation protection, program of monitoring of the area of work, characteristic of the premises, management of remainder radioactive, program of quality control, aspect related to the radiation protection in the procedure of diagnosis with the investigation; as well as to pregnant patients and those related to the investigation to accidental medical exhibitions. In the work a systematization of the main results had been done, insisting on the evaluation of the doses received by the workers occupational exposed. A comparison of the activities administered to the patients by different departments and the internationally recommended ones, explaining the found differences. In addition the main recommendations were exposed to obtain in these departments an optimization of the radiological safety.

  2. Department of Defense perspective

    International Nuclear Information System (INIS)

    Devine, R.

    1985-01-01

    This paper examines radiation instrumentation from the Department of Defense perspective. Radiation survey instruments and calibration, or RADIAC, as it is called in the services, while administratively falling under the Assistant Secretary of Defense for Atomic Energy, has generally been managed at a lower level. The Naval Electronics Systems Command and Army Signal Corp are the two principles in the Department of Defense for RADIAC. The actions of the services are coordinated through the tri-service RADIAC working group, which meets about every year and a half. Several points from this organization are highlighted

  3. Investigation of radiation-enhanced oxygen diffusion in Li-Ti ferrites

    International Nuclear Information System (INIS)

    Surzhikov, A.P.; Pritulov, A.M.; Gyngazov, S.A.; Lysenko, E.N.

    1999-01-01

    The radiation-enhanced oxygen diffusion in polycrystalline Li-Ti ferrites was investigated. The electron accelerator ELV-6 (Institute of Nuclear Physics, Russian Academy of Sciences) was used to generate the radiothermal annealing. The radiation effects were established by comparison of diffusion profiles of the samples, which were radiothermally treated, and data obtained during the thermal annealing in the resistance furnace. It was discovered that there was an increase of numerical values of Ed (activation diffusion energy) and Do (preexponential factor) during the radiothermal annealing, if compared with the thermal one. The investigations were financed by the Russian Fundamental Research Fund

  4. Investigation of gamma-ray fingerprint identifying mechanism for the types of radiation sources

    International Nuclear Information System (INIS)

    Liu Suping; Wu Huailong; Gu Dangchang; Gong Jian; Hao Fanhua; Hu Guangchun

    2002-01-01

    Radiation fingerprints sometimes can be used to label and identify the radiation resources. For instance, in a future nuclear reduction treaty that requires verification of irreversible dismantling of reduced nuclear warheads, the radiation fingerprints of nuclear warheads are expected to play a key role in labelling and identifying the reduced warheads. It would promote the development of nuclear warheads deep-cuts verification technologies if authors start right now some investigations on the issues related to the radiation fingerprints. The author dedicated to the investigation of gamma-ray fingerprint identifying mechanism for the types of radiation resources. The purpose of the identifying mechanism investigation is to find a credible way to tell whether any two gamma-ray spectral fingerprints that are under comparison are radiated from the same resource. The authors created the spectrum pattern comparison (SPC) to study the comparability of the two radiation fingerprints. Guided by the principle of SPC, the authors programmed a software dedicated to identify the types of radiation resources. The efficiency of the software was tested by a series of experiments with some laboratory gamma-ray resources. The experiments were designed to look into the relations between comparability and radioactive statistics, and the relations between comparability and some measurement conditions such as real time, resource activity and background etc. Two main results can be drawn from the investigation: 1) it is quite feasible to use the concept of spectral comparability to answer the question whether any two gamma-ray fingerprints are identity or not; 2) the identifying mechanism can only identify the types of radiation resources, and cannot identify the individuals with the same type and small differences

  5. Investigations into radiation damages of reactor materials by computer simulation

    International Nuclear Information System (INIS)

    Bronnikov, V.A.

    2004-01-01

    Data on the state of works in European countries in the field of computerized simulation of radiation damages of reactor materials under the context of the international projects ITEM (European Database for Multiscale Modelling) and SIRENA (Simulation of Radiation Effects in Zr-Nb alloys) - computerized simulation of stress corrosion when contact of Zr-Nb alloys with iodine are presented. Computer codes for the simulation of radiation effects in reactor materials were developed. European Database for Multiscale Modelling (EDAM) was organized using the results of the investigations provided in the ITEM project [ru

  6. [Investigation of non-ionizing radiation hazards from physiotherapy equipment in 16 medical institutions].

    Science.gov (United States)

    He, Jia-xi; Zhou, Wei; Qiu, Hai-li; Yang, Guang-tao

    2013-12-01

    To investigate the non-ionizing radiation hazards from physiotherapy equipment in medical institutions and to explore feasible control measures for occupational diseases. On-site measurement and assessment of ultra-high-frequency radiation, high-frequency electromagnetic field, microwave radiation, and laser radiation were carried out in 16 medical institutions using the methods in the Measurement of Physical Agents in Workplace (GBZ/T189-2007). All the investigated medical institutions failed to take effective protective measures against non-ionizing radiation. Of the 17 ultra-short wave therapy apparatus, 70.6%, 47.1%, and 17.64% had a safe intensity of ultra-high-frequency radiation on the head, chest, and abdomen, respectively. Of the 4 external high-frequency thermotherapy apparatus, 100%, 75%, and 75%had a safe intensity of high-frequency electromagnetic field on the head, chest, and abdomen, respectively. In addition, the intensities of microwave radiation and laser radiation produced by the 18 microwave therapy apparatus and 12 laser therapeutic apparatus met national health standards. There are non-ionizing radiation hazards from physiotherapy equipment in medical institutions, and effective prevention and control measures are necessary.

  7. Total quality culture in radiotherapy departments across Ontario

    International Nuclear Information System (INIS)

    Mitera, Gunita; Whitton, Anthony; Gutierrez, Eric; Robson, Sheila

    2011-01-01

    Purpose: To investigate the prevalence of total quality culture (TQC) within radiation therapy (RT) departments across Ontario, Canada. Methods: A prospective quantitative survey was distributed within RT departments across Ontario, Canada using the Miller Consulting Group Quality Culture survey. Findings: Ninety percent of managers (9/10) and 50% of employees (261/519) participated. There was concordance between managers and staff that overall RT departments exhibit a work culture that somewhat resembles TQC. Both groups scored 55% of the categories as somewhat agree with TQC and 9% of categories as no TQC. There was discordance in views for 36% of the categories, where managers scored a higher prevalence of TQC compared to their therapists. Larger RT departments (>50 employees) had more prevalence of discrepancy between group scores. Conclusions: This is the first study to report on the prevalence of TQC within RT departments. Strategies designed for on-going continuous improvement will benefit staff, RT managers, continuity of patient care and patient safety within RT departments.

  8. Investigating the effect of ionizing radiations on humoral immune system in industrial radiographers

    International Nuclear Information System (INIS)

    Zakeri, Fariedeh.

    1993-01-01

    A general review of radiobiology, immunology system,mechanism of biological effect of radiation and their biological damaging on cells and organs and specifically radiation effects on humoral immune system are given. The purpose is investigating the side effects of occupational exposures caused by ionizing radiation, and reviewing the decreasing probability of humoral immune responses in industrial radiographers. Generally, it measures the following humoral factors of industrial radiographers by value of different exposures: 1-Measuring immunoglobulins serum which consist of IgM, IgG, IgA, IgE. 2-Electrophoresis of serum proteins to investigate gamma globulins changes and also the changes occur in serum globulins after exposure. 3-Investigating the titration of isohem glutins serum (or natural immunoglobulins) that is mostly from IgM. 4-Measuring the above experiments on health control personnel who have not exposed to occupational or biological radiation effects. 5-Comparing the results of the two groups by statistical analysis. 6-Trying to relate the exposure to the information obtained from the above experiments. 7-Finally, to obtain this response whether mutation as low dose of radiation as investigated in this project is a threatening factor to the health and immunity of industrial radiographers

  9. The Plan for Investigating the Radiation Environment around the KAERI Site

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Geun Sik; Lee, Chang Woo

    2007-11-15

    The investigation of the radiation environment is carried out broadly for the environmental radiation measurement, analyses of the environmental radioactivity and radiological assessment for the public. Environmental radiation dose is measured by a continuous and a portable environmental radiation monitor (ERM) in the range of the radius of 30 km from the sites. And the accumulated radiation dose is measured by thermoluminescent dosimeter (TLD). The environmental radioactivity on gross alpha and gross beta, Uranium, Tritium, Strontium, and gamma-radionuclides are analyzed routinely in the various samples such as air particulate, air iodine, air moisture, soil, sediment, pine needle, rainwater, surface water, underground water, fallout, farm products, and stock farm products. Effective dose assessment by monitoring results is performed to obtain the public confidence.

  10. Investigation into radiation-chemical transformations of polyamide P-54

    International Nuclear Information System (INIS)

    Khabarov, V.N.; Kozlov, L.L.; Panchenkov, G.M.

    1981-01-01

    Investigation results of alcohol-soluble polyamide P-54 radiolysis by different physicochemical methods are presented. It has been established that under the effect of γ-radiation certain processes take place in polyamide, which are connected with branching, structurization and destruction of macromolecules. Radiation-chemical yields of gaseous products during irradiation in the air and in vacuum at irradiation temperatures from 273 to 393 K are calculated. The ratio of the rates of lacing and destruction processes is found and radiation yields of the processes are determined. Under irradiation in the air at temperatures >333 K chain oxidation of P-54 takes place and the growth of pe-- roxide compounds with 8 molecules/100 eV at 298 K up to 135 mole-- cules/100 eV at irradiation temperature 373 K testifies to the fact

  11. Investigation of inactivation of Clostridium botulinum toxin by nuclear radiation

    International Nuclear Information System (INIS)

    Kaltenhaeuser, A.; Werner, K.H.

    1989-01-01

    The effect of nuclear radiation on the toxicity and the molecular structure of the toxin produced by the microorganism Clostridium botulinum type A was investigated. The radiation induced changes in the structure of the toxin molecule. This effect is influenced by the composition or the medium above the toxin solution as well as by the temperature during the irradiation. The results of the investigation indicate that with increasing irradiation dose a new molecule was formed with immunological properties similar to the properties of the original molecule however with a greater molecular weight. After exposure to a radiation dose of 3,4 Mrad at normal temperature in air, complete detoxification of the substance was found. Immunizing experiments with the toxoid with two guinea-pigs indicated a pronounced increase of the antibody titer in the serum after 4 weeks. Vaccination experiments with the toxoid on animals show, that the protection against the effect of the toxin corresponds to the demands of the European Pharmacopoeia. The efficiency of the toxoid shows a similar efficiency as toxoids produced by chemical methods. The production of a toxoid-viccine with the relatively simple method of nuclear radiation appears possible. (orig./MG) With 12 refs., 3 tabs., 11 figs [de

  12. National Institutes of Health Funding in Radiation Oncology: A Snapshot

    Energy Technology Data Exchange (ETDEWEB)

    Steinberg, Michael; McBride, William H.; Vlashi, Erina [Department of Radiation Oncology, David Geffen School of Medicine at University of California, Los Angeles (UCLA), and Jonsson Comprehensive Cancer Center at UCLA, Los Angeles, California (United States); Pajonk, Frank, E-mail: fpajonk@mednet.ucla.edu [Department of Radiation Oncology, David Geffen School of Medicine at University of California, Los Angeles (UCLA), and Jonsson Comprehensive Cancer Center at UCLA, Los Angeles, California (United States)

    2013-06-01

    Currently, pay lines for National Institutes of Health (NIH) grants are at a historical low. In this climate of fierce competition, knowledge about the funding situation in a small field like radiation oncology becomes very important for career planning and recruitment of faculty. Unfortunately, these data cannot be easily extracted from the NIH's database because it does not discriminate between radiology and radiation oncology departments. At the start of fiscal year 2013 we extracted records for 952 individual grants, which were active at the time of analysis from the NIH database. Proposals originating from radiation oncology departments were identified manually. Descriptive statistics were generated using the JMP statistical software package. Our analysis identified 197 grants in radiation oncology. These proposals came from 134 individual investigators in 43 academic institutions. The majority of the grants (118) were awarded to principal investigators at the full professor level, and 122 principal investigators held a PhD degree. In 79% of the grants, the research topic fell into the field of biology, 13% in the field of medical physics. Only 7.6% of the proposals were clinical investigations. Our data suggest that the field of radiation oncology is underfunded by the NIH and that the current level of support does not match the relevance of radiation oncology for cancer patients or the potential of its academic work force.

  13. National Institutes of Health Funding in Radiation Oncology: A Snapshot

    International Nuclear Information System (INIS)

    Steinberg, Michael; McBride, William H.; Vlashi, Erina; Pajonk, Frank

    2013-01-01

    Currently, pay lines for National Institutes of Health (NIH) grants are at a historical low. In this climate of fierce competition, knowledge about the funding situation in a small field like radiation oncology becomes very important for career planning and recruitment of faculty. Unfortunately, these data cannot be easily extracted from the NIH's database because it does not discriminate between radiology and radiation oncology departments. At the start of fiscal year 2013 we extracted records for 952 individual grants, which were active at the time of analysis from the NIH database. Proposals originating from radiation oncology departments were identified manually. Descriptive statistics were generated using the JMP statistical software package. Our analysis identified 197 grants in radiation oncology. These proposals came from 134 individual investigators in 43 academic institutions. The majority of the grants (118) were awarded to principal investigators at the full professor level, and 122 principal investigators held a PhD degree. In 79% of the grants, the research topic fell into the field of biology, 13% in the field of medical physics. Only 7.6% of the proposals were clinical investigations. Our data suggest that the field of radiation oncology is underfunded by the NIH and that the current level of support does not match the relevance of radiation oncology for cancer patients or the potential of its academic work force

  14. Investigations on UCS-CS mediation in radiation-induced conditioned taste aversion

    International Nuclear Information System (INIS)

    Burns, T.C.

    1974-01-01

    Groups of 8 male Sprague-Dawley rats were used in an investigation of procaine and dimenhydrinate effects on radiation-induced taste aversion learning. Neither the local anesthetic procaine, administered intraperitoneally, nor the antinausea drug dimenhydrinate, administered intramuscularly, blocked acquisition of aversion to saccharin flavored water. Control animals confirmed that saccharin preferences appeared normally in non-irradiated animals, and that the drugs produced no aversion in the absence of radiation. Another investigation, using groups of 5 female Sprague-Dawley rats, showed a failure of dimenhydrinate in blocking the acquisition of a rotation-induced conditioned taste aversion. Two dose levels of the drug were used, 1 mg/kg and 2 mg/kg. At the dimenhydrinate dosage used in the study involving radiation (1.75 mg/kg) and at the higher dosage used in the study involving rotation, there appeared to be a potentiation of the effects of radiation and rotation, respectively. Results of these studies seem to favor a model for UCS-CS mediation as being diffuse and perhaps redundant. The possibility that nausea-producing stimuli may work synergistically was also discussed. (U.S.)

  15. Doses in radiation accidents investigated by chromosome aberration analysis

    International Nuclear Information System (INIS)

    Lloyd, D.C.; Purrott, R.J.; Prosser, J.S.; Dolphin, G.W.; Tipper, P.A.; Reeder, E.J.; White, C.M.; Cooper, S.J.; Stephenson, B.D.

    1977-01-01

    Results from cytogenetic investigations into 66 cases of suspected over-exposure to radiation during 1976 are reviewed. This report is the sixth in an annual series which together contain data on 272 studies. Previous results were published in NRPB-R5, R10, R23, R35 and R41. Results from all investigations have been pooled for general analysis. Brief accounts are given in an appendix of the circumstances behind the past year's investigations and, where possible, physical estimates of dose have been included for comparison. A short review is given of the laboratory's recently published dose response data for several energies of neutron radiation. A description is also given of the group's collaboration in an international experiment in which comparisons were made between a variety of dosemeters exposed to a controlled criticality pulse. In a second appendix two experiments are described in which inter- and intra-donor effects on chromosome aberration yields were examined. It was found that differences in dicentric yields were small whereas acentric aberrations were more variable. (author)

  16. Investigation of Magnetospheric Line Radiation above China

    Science.gov (United States)

    Sheng, X.; Wu, J.; Pu, X.

    2017-12-01

    Magnetospheric Line Radiation (MLR) is a kind of VLF emission that is considered by some researchers to be related with the power system on ground, and in frequency-time spectrograms of electromagnetic field, it has a line structure with large frequency bandwidth. These emission waves propagate through the magnetosphere and strongly interact with energetic electrons trapped in the earth's magnetic field. Such a wave-particle interaction amplifies the radiation and scatters energetic electrons, which may trigger new radiations. We detected 328 MLR events by analyzing the electric field data observed by DEMETER satellite in the space above China from the year of 2008 to 2010. Their characteristics and possible cause have been investigated systematically. There were more MLR events in daytime than in nighttime and more in winter than in summer. Such diurnal and seasonal differences were closely associated with whistlers and ionosphere conditions. Comparing Kp indices at the occurring time of MLR events and nationwide Kp indices through the analyzed years, we found these MLR events were not significantly dependent on geomagnetic activity. Most of events were distributed in the low latitude, while their peak intensities in frequency-time spectrograms seemed to be independent of latitude. The frequency intervals of MLR events were between 50 to 95Hz, and the frequency drifts were mostly in 0 0.4Hz/s. The above characteristics of MLR events were similar to those of Power Line Harmonic Radiation (PLHR) events observed in the space above China, therefore we inferred that these two emissions have close relation.

  17. The radiation dose to the foetus during isotope investigations of the mother

    International Nuclear Information System (INIS)

    Hahn, K.; Brod, K.H.; Wolf, R.

    1980-01-01

    The radiation dose to the foetus from the application of five different sup(99m)technetium compounds during isotope investigation of the mother was investigated. After i-v injection of 100 μCi(3.7 MBq) of sup(99m)Tc-compounds into pregnant rats, these were sacrificed during the first, second and third week of pregnancy and radioactivity was determined in the foetuses and in the blood and organs of the mother. From these measurements the proportion of total body activity in individual organs and their specific activity was calculated. From this data the radiation burden to the rat foetuses from the various sup(99m)Tc compounds could be evaluated. Making use of phantom studies and the known biokinetic data of technetium compounds in man it was possible to calculate the radiation dose to the human foetus during isotope investigations of the mother. (orig.) [de

  18. Three example applications of optimization techniques to Department of Energy contractor radiation protection programs

    International Nuclear Information System (INIS)

    Merwin, S.E.; Martin, J.B.; Tawil, J.J.; Selby, J.M.

    1986-06-01

    Six numerical examples of optimization of radiation protection are provided in the appendices of International Commission on Radiological Protection (ICRP) Publication 37 (ICRP83). In each case, the calculations are based on fairly well-defined parameters and assumptions that were well understood. In this paper, we have examined three different numerical examples that are based on empirical data and less certain assumptions. These examples are intended to represent typical applications of optimization principles to the evaluation of specific elements of a radiation protection program. In the first example, the optimum bioassay frequency for certain tritium workers was found to be once every 95 days, which compared well with the recommendations of ICRP Publication 10 (ICRP67). The second example showed that the optimum frequency for recalibrating a group of ''Cutie-Pie'' (CP)-type ionization chamber survey instruments was once every 102 days. In the third example, one continuous air monitor (CAM) was determined to be the optimum number in a workplace of a Department of Energy (DOE) plutonium facility. The optimum location of the CAM was determined from past glovebox release studies

  19. SARIS: a tool for occupational radiation protection improvement in a Nuclear Medicine Department

    International Nuclear Information System (INIS)

    Lopez Diaz, A.

    2015-01-01

    Self-assessment is an organization's internal process to review its current status. The IAEA has developed the SARIS system (Self-Assessment of the Regulatory Infrastructure for Safety) with the objective to improve and encourage the compliment of safety requirements and recommendations of the international safety standards. With the purpose to improve the effectiveness and efficiency of the occupational radiation protection structure in the Nuclear Medicine Department (from 'Hermanos Ameijeiras' Hospital), we applied 3 questionnaires of the Occupational Radiation Protection Module of SARIS. During the answering phase we provided factual responses to questions, appended all necessary documentary evidence and avoided opinion that cannot be objectively supported by evidence. In the analysis phase we identified the strengths and weaknesses, the opportunities for improvement and the risks if action is not taken. We look the expert's opinion and made recommendations to prepare an action plan for improvement. The Cuban regulations have more strengths than weakness. The major weakness founded was: the documental evidence of the knowledge about the legislative safety responsibility of the management structure and workers could be improved. Upon completion of the self-assessment analysis phase, was developed an action plan, trying to cover all the discovered weakness, making emphasis in the improvement of all documental issue related to radiation safety responsibilities. Were defined the responsibilities and activities in the short, medium and long terms. The SARIS self-assessment tools let us to learn more about our organization and provided us the key elements for the organization's continuous development and improvement. (Author)

  20. Cybernetical investigations on the radiation effects on tumour cells

    International Nuclear Information System (INIS)

    Iliakis, G.

    1978-01-01

    The goal of this work was to find suitable conditions for the in-vitro investigations with these E.A.T. cells so that basic experiments carried out with yeast cells will also be possible. Systematic investigations on cell multiplication led to reliable and definite test conditions for these cells. For the evaluation of the data which had been measured with several sorts of radiation the cybernetic model was applied. (orig./MG) [de

  1. Clinical and experimental investigation on small intestinal injury following radiation therapy for carcinoma of uterine cervix

    International Nuclear Information System (INIS)

    Asakura, Midori

    1977-01-01

    Radiation injury of the small bowel was observed in 6 of 460 patients with carcinoma of uterine cervix who were treated by radiation between April 1966 and December 1973 at Tokyo Women's Medical College, Department of Radiology. Three of these 6 patients were treated conservatively and the other 3 others underwent surgery but died subsequently. Clinically and surgically these 6 patients showed marked adhesions of intestinal loops, which may be accounted for by the radiation injury of the small bowel. Clinical experience has shown that it is necessary to use a small radiation field to decrease small bowel injury from radiation. An experiment using abdominal radiation in mice confirmed that LD sub(50/30) is larger with a center split, maintaining equal integral doses. In adult dogs, severe small bowel obstruction was observed with over 4000 rad irradiation. Small bowel injury was milder in case with center split, intracavitary irradiation, and small radiation field. It was concluded that center split is one of the methods of preventing radiation injury of the small bowel. (Evans, J.)

  2. Madigan Army Medical Center Department of Clinical Investigation Annual Progress Report Fiscal Year 1999

    Science.gov (United States)

    1999-09-30

    ferrets with diseased adrenal glands are usually unremarkable, occasionally a complete blood count may reveal regenerative or nonregenerative anemia and...renal failure and hypertension in non-pregnant individuals, and in pregnant women with preeclampsia . To date there exist no studies demonstrating the...Investigator: CDR Sylvia Y . N. Young, MC, USN Department: Preventive Medicine Facility: MAMC Associate Investigator(s): LTC Jeffrey D. Gunzenhauser, MC

  3. Radiation regulation

    International Nuclear Information System (INIS)

    Braithwaite, J.; Grabosky, P.

    1985-01-01

    The five main areas of radiation regulation considered are radiation exposure in the mining of uranium and other minerals, exposure in the use of uranium in nuclear reactors, risks in the transport of radioactive materials and hazards associated with the disposal of used materials. In Australia these problems are regulated by mines departments, the Australian Atomic Energy Commission and radiation control branches in state health departments. Each of these instutional areas of regulation is examined

  4. Investigation of environmental natural penetrating radiation in Hunan province

    International Nuclear Information System (INIS)

    1991-01-01

    The methods and results of the investigation of natural penetrating radiation level in Hunan Province are presented. 309 25 x 25 km-netted measuring points were set up uniformly all over the province, with 1007 densely measuring points of different type added. The results showed that: (1) the point-weighted, area-weighted and population-weighted average value of natural γ radiation dose rate over field was 7.11, 6.90 and 7.07 x 10 -8 Gy · h -1 , respectively; (2) The point-weighted and population-weighted average value of natural γ radiation dose rate over road was 7.05 x 10 -8 Gy · h -1 ; (3) The point-weighted and population-weighted average value of natural γ radiation dose rate inside buildings was 10.43 and 10.56 x 10 -8 Gy · h -1 ; (4) The point-weighted and population-weighted average value of the dose rate inside buildings from cosmic ray was 2.67 and 2.66 x 10 -8 Gy · h -1 , respectively; (5) The point-weighted and population-weighted average value of natural penetrating radiation dose rate inside buildings was 13.1 and 13.2 x 10 -8 Gy · h -1 , and outside buildings was 10.1 and 9.88 x 10 -8 Gy · h -1 , respectively; (6) The annual effective dose equivalent from natural γ radiation, cosmic ray and natural penetrating radiation was 0.58, 0.24 and 0.82 mSv, respectively, and correspondingly, the annual collective effective dose equivalent was 3.1, 1.3 and 4.4 x 10 4 man · Sv, respectively

  5. National Institutes of Health funding in radiation oncology: a snapshot.

    Science.gov (United States)

    Steinberg, Michael; McBride, William H; Vlashi, Erina; Pajonk, Frank

    2013-06-01

    Currently, pay lines for National Institutes of Health (NIH) grants are at a historical low. In this climate of fierce competition, knowledge about the funding situation in a small field like radiation oncology becomes very important for career planning and recruitment of faculty. Unfortunately, these data cannot be easily extracted from the NIH's database because it does not discriminate between radiology and radiation oncology departments. At the start of fiscal year 2013 we extracted records for 952 individual grants, which were active at the time of analysis from the NIH database. Proposals originating from radiation oncology departments were identified manually. Descriptive statistics were generated using the JMP statistical software package. Our analysis identified 197 grants in radiation oncology. These proposals came from 134 individual investigators in 43 academic institutions. The majority of the grants (118) were awarded to principal investigators at the full professor level, and 122 principal investigators held a PhD degree. In 79% of the grants, the research topic fell into the field of biology, 13% in the field of medical physics. Only 7.6% of the proposals were clinical investigations. Our data suggest that the field of radiation oncology is underfunded by the NIH and that the current level of support does not match the relevance of radiation oncology for cancer patients or the potential of its academic work force. Copyright © 2013 Elsevier Inc. All rights reserved.

  6. Investigation of Lithium Metal Hydride Materials for Mitigation of Deep Space Radiation

    Science.gov (United States)

    Rojdev, Kristina; Atwell, William

    2016-01-01

    Radiation exposure to crew, electronics, and non-metallic materials is one of many concerns with long-term, deep space travel. Mitigating this exposure is approached via a multi-faceted methodology focusing on multi-functional materials, vehicle configuration, and operational or mission constraints. In this set of research, we are focusing on new multi-functional materials that may have advantages over traditional shielding materials, such as polyethylene. Metal hydride materials are of particular interest for deep space radiation shielding due to their ability to store hydrogen, a low-Z material known to be an excellent radiation mitigator and a potential fuel source. We have previously investigated 41 different metal hydrides for their radiation mitigation potential. Of these metal hydrides, we found a set of lithium hydrides to be of particular interest due to their excellent shielding of galactic cosmic radiation. Given these results, we will continue our investigation of lithium hydrides by expanding our data set to include dose equivalent and to further understand why these materials outperformed polyethylene in a heavy ion environment. For this study, we used HZETRN 2010, a one-dimensional transport code developed by NASA Langley Research Center, to simulate radiation transport through the lithium hydrides. We focused on the 1977 solar minimum Galactic Cosmic Radiation environment and thicknesses of 1, 5, 10, 20, 30, 50, and 100 g/cm2 to stay consistent with our previous studies. The details of this work and the subsequent results will be discussed in this paper.

  7. Chemical protection and sensitization to ionizing radiation:molecular investigations

    International Nuclear Information System (INIS)

    Badiello, R.

    1980-01-01

    Chemical radioprotection and radiosensitization are induced by the presence of certain chemical compounds, which reduce or enhance the effect of ionizing radiation on living organisms. Such substances are either naturally present or may be artificially introduced in the living cells. Chemical radioprotectors are interesting for possible application in the health protection of both professionally exposed workers and patients treated by radiation for diagnostic and thereapeutic purposes. Interest in chemical radiosensitization has increased recently because of its potential application in the radiotherapy of tumours. Both radioprotection and radiosensitization occur by means of complicated mechanisms, which at first correspond to very fast reactions. The mechanism of the interaction between such substances and radiation-induced biological radicals has been investigated by means of pulse radiolysis and rapid mixing techniques. Examples of the application of these techniques are given to illustrate how information has been obtained on the molecular basis of radiation chemical modi-fication at the cellular level. In particular some interactions between model systems of biological interest (DNA, DNA components, enzymes, amino acids, etc.) and sulphur-containing radioprotectors (glutathione, cysteine, etc.) and/or electroaffinic radiosensitizers, are described. (H.K.)

  8. Meeting the challenge of managed care - Part II: Designing a radiation oncology department and setting up a clinical practice program

    International Nuclear Information System (INIS)

    Halman, Marc A.; Szerlag, Chester

    1997-01-01

    Objective: Identify the business practices necessary to develop a successful radiation oncology department in the current health care environment. Course content will be of interest to new practitioners establishing first time programs or joining existing groups as well as experienced radiation oncologists who are challenged with redesigning programs to be competitive. Course Content: During this session, the following topics will be discussed: 1) Space planning and equipment selection 2) Personnel; creating efficiencies while promoting productivity 3) Professional and Technical Billing; establishing proper fee structures and coding procedures 4) Utilizing benchmarking as a tool to improve operations 5) Information technology in radiation oncology 6) Current and Future Trends: a) Oncology networks b) Reimbursement: managed care and capitation c) Downsizing d) Relative Value Units

  9. Organisational culture at the Radiation and Nuclear Safety Authority of Finland's department of Nuclear Reactor Regulation

    International Nuclear Information System (INIS)

    Reiman, T.; Norros, L.

    2001-03-01

    A case study to investigate the organisational culture of the regulatory authority was conducted at the Radiation and Nuclear Safety Authority of Finland's (STUK) Nuclear Reactor Regulation (YTO) - department. Organisational culture is defined as a pattern of shared basic assumptions, which are basically unconscious. Objectives of the study were to conceptualise and describe the main characteristics of YTO's organisational culture and to carry out a tentative core task analysis of the inspectors' work. A combination of quantitative and qualitative methods was used in the research. YTO's culture was identified as a hierarchy-focused culture with less emphasis on innovation or social support. However, the ideal values of the personnel emphasised also social support and goal setting. Ambiguous goals were felt by some personnel as increased uncertainty about the meaningfulness of one's job. Also a lack of feedback was mentioned. The core task analysis identified the critical functions of the regulatory practice. These functions specify the three roles of the regulatory authority, the expert role, the public role and the authority role. The culture must support the fulfilment of the requirements of all the three roles. Development needs in YTO's culture were identified and recommendations were made. (au)

  10. Nuclear Safety Research Department annual report 2000

    DEFF Research Database (Denmark)

    Majborn, B.; Nielsen, Sven Poul; Damkjær, A.

    2001-01-01

    The report presents a summary of the work of the Nuclear Safety Research Department in 2000. The department's research and development activities were organized in two research programmes: "Radiation Protection and Reactor Safety" and "Radioecology andTracer Studies". In addtion the department...

  11. Nuclear Safety Research Department annual report 2001

    DEFF Research Database (Denmark)

    Majborn, B.; Damkjær, A.; Nielsen, Sven Poul

    2002-01-01

    The report presents a summary of the work of the Nuclear Safety Research Department in 2001. The department's research and development activities were organized in two research programmes: "Radiation Protection and Reactor Safety" and "Radioecology andTracer Studies". In addition the department...

  12. Investigation of environmental natural penetrating radiation in Shanxi Province

    International Nuclear Information System (INIS)

    Li Junshan; Chen Baotian; Zhang Runrun; He Zeyong; Li Jinfu

    1990-01-01

    The methods and results of the investigation on natural penetrating radiation level in Shanxi Province are presented. 262 25 x 25 km-netted measuring points were set unformly up all over the province, with 255 densely measuring points of different types added. The results showed that: (1) The point-weighted, area-weighted and population-weighted average value of natural γ radiation dose rate over field was 5.39, 5.41 and 5.43 x 10 -8 Gy·h -1 , respectively; (2) The point-weighted average value of natural γ radiation dose rate over road was 4.84 x 10 -8 Gy·h -1 ; (3) The point-weighted and population-weighted average value of natural γ radiation dose rate inside buildings was 8.09 and 8.24 x 10 -8 Gy·h -1 ; (4) The point-weighted and population-weighted average value of the dose rate inside buildings from cosmic ray was 3.46 and 3.36 x 10 -8 Gy·h -1 , and outside buildings was 3.85 and 3.73 x 10 -8 Gy·h -1 , respectively; (5) The point-weighted and population-weighted average value of natural penetrating radiation dose rate inside buildings was 11.55 and 11.60 x 10 -8 Gy·h -1 and outside buildidngs was 8.97 and 8.42 x 10 -8 Gy·h -1 , respectively; (6) The annual effective dose equivalent from natural γ radiation, cosmic ray and natural penetrating radiation was 0.46, 0.30 and 0.76 mSv, respectively, and correspondingly, the annual collective effective dose equivalent was 1.2, 0.77 and 2.0 x 10 4 man·Sv, respectively

  13. NIH funding in Radiation Oncology – A snapshot

    Science.gov (United States)

    Steinberg, Michael; McBride, William H.; Vlashi, Erina; Pajonk, Frank

    2013-01-01

    Currently, pay lines for NIH grants are at a historical low. In this climate of fierce competition knowledge about the funding situation in a small field like Radiation Oncology becomes very important for career planning and recruitment of faculty. Unfortunately, this data cannot be easily extracted from the NIH s database because it does not discriminate between Radiology and Radiation Oncology Departments. At the start of fiscal year 2013, we extracted records for 952 individual grants, which were active at the time of analysis from the NIH database. Proposals originating from Radiation Oncology Departments were identified manually. Descriptive statistics were generated using the JMP statistical software package. Our analysis identified 197 grants in Radiation Oncology. These proposals came from 134 individual investigators in 43 academic institutions. The majority of the grants (118) were awarded to PIs at the Full Professor level and 122 PIs held a PhD degree. In 79% of the grants the research topic fell into the field of Biology, in 13 % into the field of Medical Physics. Only 7.6% of the proposals were clinical investigations. Our data suggests that the field of Radiation Oncology is underfunded by the NIH, and that the current level of support does not match the relevance of Radiation Oncology for cancer patients or the potential of its academic work force. PMID:23523324

  14. Department of Training and Consulting - Overview

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    2007-01-01

    Department of Training and Consulting is regularly serving secondary schools' pupils and teachers, university students and the public. As usual we have been visited by about 7000 visitors, mainly students from secondary schools in Poland. The Department is constantly developing experiments which can be conducted by students of secondary schools and universities, as well as by professionals. At the moment there are about 20 experiments available for the guests of the Department. They cover measurements of the lifetimes, elements of radioprotection, absorption of radiation in various materials, excitation of fluorescence radiation, influence of magnetic field on beta radiation as well as electrons emitted from typical electron gun, Compton scattering and elements of gamma spectroscopy, search for radioactive pollutions etc. In addition the Department was very active during Science Picnic in May and Science Festival in September, when the Department proposed organisation of a '' Day with Radioactivity ''. '' The Day '' consisted of a number of public lectures and demonstrations. In addition two evenings were dedicated to a public debate on energy sources and energy demands and supply in next 50-100 years. One should also mention organisation and leading of the professional course for accelerators' operators, as well as starting a new university course on '' Nuclear Energy and Its Use '' (Cardinal Stefan Wyszynski University, Warsaw). The web side of the Department contains educational materials (part of it can be found on international platform http://www.nupex.org), quizzes and self-teaching materials. (author)

  15. Investigation of environmental natural penetrating radiation level in Beijing

    International Nuclear Information System (INIS)

    Wu Zengxin; Zhang Wenying; Zheng Rukuan; Wei Shujun; Ding Huiqiu

    1992-01-01

    The authors report the methods and results of investigation of environmental natural penetrating radiation level in Beijing. There were 83 measurement points selected, which were located at the vertexes of 1 x 1 km square meshes and uniformly distributed over the urban district. 173 net grid measuring points selected with grid spacing of 10 x 10 km and uniformly distributed over the suburban district. Another 131 more densely distributed points were added over some special areas. The results show that: (1) The point-weighted, area-weighted and population-weighted average value of natural γ radiation dose rate over field is 56.2, 56.4 and 50.1 nGy · h -1 respectively. The γ radiation dose rate is higher in west and north area than in southeast area. (2) The point-weighted average value of natural γ radiation dose rate over roads was 49.3 nGy · h -1 . (3) The point weighted and population-weighted average value of natural γ radiation dose inside buildings was 83.5 and 77.1 nGy · h -1 respectively. (4) The weighted average of air absorbed dose rate from the ionizing components of cosmic rays (except for neutron) over point number and population was respectively 29.0 and 27.5 nGy · h -1 indoors, and 32.3 and 30.8 nGy · h -1 outdoors. (5) The point and population-weighted means of natural penetrating radiation dose rate (the contribution from neutron is not included) are 112.8 and 104.5 nGy · h -1 indoors, respectively; 88.7 and 81.3 nGy · h -1 outdoors, respectively. (6) The annual effective dose equivalent per capital people natural γ radiation, cosmic ray and natural penetrating radiation was 0.43, 0.25 and 0.68 mSv respectively, and the annual collective effective dose equivalent was 4.0, 2.3 and 6.3 x 10 3 man · Sv, respectively

  16. Investigation of the factors disguising radiation effects on the human body

    International Nuclear Information System (INIS)

    Korzeneva, I.B.; Styazhkina, T.V.; Dubrova, Y.E.; Malinina, T.V.; Prokhorovskaya, V.D.; Kholod, O.N.

    1998-01-01

    Herein we have studied the effects of some hereditary and environmental factors on children's states of health. The factors under investigation, along with radiation, also impact the immunological status and human adaptivity, thus disguising hazardous radiation effects. The state-of-health criterion we have chosen are children's liability to a wide range of intrinsic diseases through the first three years of life. The analysis involved 626 children (326 male and 300 female) who's parents and grandparents lived in the vicinity of the Russian Federal Nuclear Centre (RFNC), a large-scale nuclear facility. Our results should preferably be taken into consideration when projecting radiation effects on the human body. (author)

  17. Radiological departments. Chapter 4.3.5

    International Nuclear Information System (INIS)

    1983-01-01

    The book deals with the problems of health, labor and fire protection in the public health service of the GDR as a whole. A special chapter treats these items concerning the conditions in radiological departments. In this connection the main legal regulations are presented. Introducing remarks on generation and properties of ionizing radiations and on biological radiation effects are outlined. Further, the responsibilities in radiation protection, maximum permissible radiation doses and the handling of X-ray devices, sealed and unsealed radiation sources are discussed

  18. EPR spectral investigation of radiation-induced radicals of gallic acid.

    Science.gov (United States)

    Tuner, Hasan

    2017-11-01

    In the present work, spectroscopic features of the radiation-induced radicals of gallic acid compounds were investigated using electron paramagnetic resonance (EPR) spectroscopy. While un-irradiated samples presented no EPR signal, irradiated samples exhibited an EPR spectrum consisting of an intense resonance line at the center and weak lines on both sides. Detailed microwave saturation investigations were carried out to determine the origin of the experimental EPR lines. It is concluded that the two side lines of the triplet satellite originate from forbidden "spin-flip" transitions. The spectroscopic and structural features of the radiation-induced radicals were determined using EPR spectrum fittings. The experimental EPR spectra of the two gallic acid compounds were consistent with the calculated EPR spectroscopic features of the proposed radicals. It is concluded that the most probable radicals are the cyclohexadienyl-type, [Formula: see text] radicals for both compounds.

  19. Radiation Protection

    International Nuclear Information System (INIS)

    Loos, M.

    2002-01-01

    Major achievements of SCK-CEN's Radiation Protection Department in 2001 are described. The main areas for R and D of the department are enviromnental remediation, emergency planning, radiation protection research, low-level radioactvity measurements, safeguards and physics measurements, decision strategy research and policy support and social sciences in nuclear research. Main achievements for 2001 in these areas are reported

  20. Evaluation of indoor air quality in a department of radiation oncology located underground

    International Nuclear Information System (INIS)

    Kim, Won Taek; Kwon, Byung Hyun; Kang, Dong Mug; Ki, Yong Kan; Kim, Dong Won; Shin, Yong Chul

    2005-01-01

    Indoor air quality (IAQ) in the radiation treatment center which is generally located underground is important to the health of hospital workers and patients treated over a long period of time. This study was conducted to measure and analyze the factors related to IAQ and subjective symptoms of sick building syndrome, and to establish the causes influencing IAQ and find a solution to the problems. Self administrated questionnaire was conducted to check the workers' symptoms and understanding of the work environment. Based on a preliminary investigation, the factors related to IAQ such as temperature, humidity, fine particulate, carbon dioxide, carbon monoxide, formaldehyde, total volatile organic compounds (TVOC), and radon gas were selected and measured for a certain period of time in specific sites where hospital workers stay long in a day. And we also evaluated the surrounding environment and the efficiency of the ventilating system simultaneously, and measured the same factors at the first floor (outdoor) to compare with outdoor air quality. All collected data were assessed by the recommended standard for IAQ of the domestic and international environmental organizations. Hospital workers were discontented with foul odors, humidity and particulate. They complained symptoms related to musculo-skeletal system, neurologic system, and mucosal-irritation. Most of the factors were not greater than the recommended standard, but the level of TVOC was third or fourth times as much as the measuring level of some offices in the United States. The frequency and the amount of the ventilating system were adequate, however, the problem arising in the position of outdoor-air inlets and indoor-air outlets involved a risk of the indraft of contaminated air. A careful attention was a requirement in handling and keeping chemical substances including a developing solution which has a risk of TVOC emissions, and repositioning the ventilating system was needed to solve the

  1. NUMERICAL INVESTIGATION OF THE COUPLED TURBULENT COMBUSTION-RADIATION IN AN

    Directory of Open Access Journals (Sweden)

    BRAHIM ZITOUNI

    2017-06-01

    Full Text Available A turbulent non-premixed methane-air flame was studied in an axisymmetric cylindrical combustion chamber, focusing on thermal radiation effects on temperature and soot concentration fields. The simulation is based on the solution of the mass, energy, momentum and chemical species conservation equations. The turbulence and its interaction with combustion are modelled by the standard k-ε model and eddy dissipation concept, respectively. The semiempirical model of Syed is implemented to deal with soot formation and oxidation and thus ensuring the overall efficiency of the present investigation. The radiative heat transfer is surveyed, for two cases: with and without soot radiation. The numerical resolution has been achieved using the Hottel’s zonal method and the standard weighted-sum-of-gray-gases model, to predict the real gas-soot mixture radiation effect. A new concept of optical exchange gap has been recently proposed and applied here after avoiding the singularities obviously encountered in the calculation of the direct exchange areas of volume zones self-irradiance. The obtained numerical results are compared to experimental data due to Brookes and Moss. Radiation exchange is found to noticeably affect temperature and soot volume fraction predictions and slightly the mixture fraction solutions. The present paper shows that taking into account turbulent combustion-radiation interactions leads to more accurate results by comparison to available experimental data.

  2. Radiation dose rates from adult patients undergoing nuclear medicine investigations

    International Nuclear Information System (INIS)

    Mountford, P.J.; O'Doherty, M.J.; Forge, N.I.; Jeffries, A.; Coakley, A.J.

    1991-01-01

    Adult patients undergoing nuclear medicine investigations may subsequently come into close contact with members of the public and hospital staff. In order to expand the available dosimetry and derive appropriate recommendations, dose rates were measured at 0.1, 0.5 and 1.0 m from 80 adult patients just before they left the nuclear medicine department after undergoing one of eight 99 Tc m studies, an 123 I thyroid, an 111 In leucocyte or a 201 Tl cardiac scan. The maximum departure dose rates at these distances of 150, 30 and 7.3 μSv h -1 were greater than those found in similar published studies of adult and paediatric patients. To limit the dose to an infant to less than 1 mSv, an 111 In leucocyte scan is the only investigation for which it may be necessary to restrict close contact between the infant and a radioactive parent, depending on the dose rate near the surface of the patient, the parent's habits and how fretful is the infant. It is unlikely that a ward nurse will receive a dose of 60 μSv in a working day if caring for just one radioactive adult patient, unless the patient is classified as totally helpless and had undergone a 99 Tc m marrow, bone or brain scan. The data and revised calculations of effective exposure times based on a total close contact time of 9 h in every 24 h period should allow worst case estimates of radiation dose to be made and recommendations to be formulated for other circumstances, including any future legislative changes in dose limits or derived levels. (author)

  3. Experimental investigation of radiation effect on human thermal comfort by Taguchi method

    International Nuclear Information System (INIS)

    Arslanoglu, Nurullah; Yigit, Abdulvahap

    2016-01-01

    Highlights: • Radiation heat flux from lighting lamps on human thermal comfort is studied. • The effect of posture position on thermal comfort is investigated. • The effect of clothing color on thermal comfort is examined. • Radiation heat flux from halogen reflector lamp increase skin temperature more. • Posture position effect on thermal comfort is less than the other parameters. - Abstract: In this study, the effect of radiation heat flux of lighting lamps on human thermal comfort was investigated by using Taguchi method. In addition, at indoor conditions, clothing color and posture position under the radiation effect on thermal comfort were also investigated. For this purpose, experiments were performed in an air conditioned laboratory room in summer and autumn seasons. The amount of temperature rise on the back was considered as performance parameter. An L8 orthogonal array was selected as an experimental plan for the third parameters mentioned above for summer and autumn seasons. The results were analyzed for the optimum conditions using signal-to-noise (S/N) ratio and ANOVA method. The optimum results were found to be clear halogen lamp as lighting lamp, white as t-shirt color, standing as posture position, in summer season. The optimum levels of the lighting lamp, t-shirt color and posture position were found to be clear halogen lamp, white, sitting in autumn season, respectively.

  4. On-site audits to investigate the quality of radiation physics of radiation therapy institutions in the Republic of Korea.

    Science.gov (United States)

    Park, Jong Min; Park, So-Yeon; Chun, Minsoo; Kim, Sang-Tae

    2017-08-01

    To investigate and improve the domestic standard of radiation therapy in the Republic of Korea. On-site audits were performed for 13 institutions in the Republic of Korea. Six items were investigated by on-site visits of each radiation therapy institution, including collimator, gantry, and couch rotation isocenter check; coincidence between light and radiation fields; photon beam flatness and symmetry; electron beam flatness and symmetry; physical wedge transmission factors; and photon beam and electron beam outputs. The average deviations of mechanical collimator, gantry, and couch rotation isocenter were less than 1mm. Those of radiation isocenter were also less than 1mm. The average difference between light and radiation fields was 0.9±0.6mm for the field size of 20cm×20cm. The average values of flatness and symmetry of the photon beams were 2.9%±0.6% and 1.1%±0.7%, respectively. Those of electron beams were 2.5%±0.7% and 0.6%±1.0%, respectively. Every institutions showed wedge transmission factor deviations less than 2% except one institution. The output deviations of both photon and electron beams were less than ±3% for every institution. Through the on-site audit program, we could effectively detect an inappropriately operating linacs and provide some recommendations. The standard of radiation therapy in Korea is expected to improve through such on-site audits. Copyright © 2017 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.

  5. Radiation protection in biological investigation centers. Problematic, development and perspectives

    International Nuclear Information System (INIS)

    Macias, M.T.; Pina, R.; Usera, F.

    1998-01-01

    The radiological risk derivatives from the radioisotope techniques accomplished in the different investigation lines developed in the Centers object of this work, have necessary made establishing an organization that assure some adequate protection conditions in the use of the ionizing radiations

  6. Computational Investigation of Soot and Radiation in Turbulent Reacting Flows

    Science.gov (United States)

    Lalit, Harshad

    scalars from the LES are used in conjunction with the radiation heat transfer equation and a narrow band radiation model to compute time dependent and time averaged images of infrared radiation intensity in spectral bands corresponding to molecular radiation from gas phase carbon dioxide and soot particles exclusively. While qualitative and quantitative comparisons with measured images in the CO2 radiation band show that the flame structure is correctly computed, images computed in the soot radiation band illustrate that the soot volume fraction is under predicted by the computations. The effect of the soot model and cause of under prediction is investigated further by correcting the soot volume fraction using an empirical state relationship. By comparing default simulations with computations using the state relation, it is shown that while the soot model under-estimates the soot concentration, it correctly computes the intermittency of soot in the flame. The study of sooting flames is extended further by performing a parametric analysis of physical and numerical parameters that affect soot formation and transport in two laboratory scale turbulent sooting flames, one fueled by natural gas and the other by ethylene. The study is focused on investigating the effect of molecular diffusion of species, dilution of fuel with hydrogen gas and the effect of chemical reaction mechanism on the soot concentration in the flame. The effect of species Lewis numbers on soot evolution and transport is investigated by carrying out simulations, first with the default equal diffusivity (ED) assumption and then by incorporating a differential diffusion (DD) model. Computations using the DD model over-estimate the concentration of the soot precursor and soot oxidizer species, leading to inconsistencies in the estimate of the soot concentration. The linear differential diffusion (LDD) model, reported previously to consistently model differential diffusion effects is implemented to correct the

  7. Investigation of radiation-induced multilayered signalling response of the inflammatory pathway

    International Nuclear Information System (INIS)

    Babini, G.; Ugolini, M.; Morini, J.; Baiocco, G.; Ottolenghi, A.; Mariotti, L.; Tabarelli de Fatis, P.; Liotta, M.

    2015-01-01

    Ionising radiation exposure of cells might induce the perturbation of cell functions and, in particular, the activation or inhibition of several important pathways. This perturbation can cause the deregulation of both intra- and extra-cellular signalling cascades (such as the inflammatory pathway) and alter not only the behaviour of directly exposed cells but also the neighbouring nonirradiated ones, through the so-called bystander effect. The aim of the present work was to investigate the complex nonlinear interactions between the inflammatory pathway and other strictly interlaced signalling pathways, such as Erk1/2 and Akt/PKB, focusing on the radiation-induced perturbation of such pathways in the dose range of 0 -2 Gy. The results show how radiation affects these interconnected pathways and how confounding factors, such as the change of culture medium, can hide radiation-induced perturbations. (authors)

  8. Doses in radiation accidents investigated by chromosome aberration analysis

    International Nuclear Information System (INIS)

    Lloyd, D.C.; Purrott, R.J.; Prosser, J.S.; White, A.D.; Dolphin, G.W.; Reeder, E.J.; Martin, L.C.; Priseman, S.J.; Gray, S.A.

    1979-01-01

    Results from cytogenetic investigations into 63 cases of suspected over-exposure to radiation during 1978 are reviewed. This report is the eighth in an annual series which together contain data on 390 studies. Results from all investigations have been pooled for general analysis. Brief accounts are given, in an appendix, of the circumstances behind the past year's investigations and, where possible, physical estimates of dose have been included for comparison. One case is described in more detail. It concerns a young man who deliberately irradiated himself with several sources of iridium-192 and received a dose of about 1.5 Gy as a fairly uniform whole body exposure. (author)

  9. Radiation Dose Measurements with Direction and from Patients Undergoing Nuclear Medicine Investigations

    International Nuclear Information System (INIS)

    AL-Shakhrah, I.

    2003-01-01

    Rdiologists and technologists are occasionally concerned about the radiation exposure that they may receive during the performance of routine diagnostic radiologic studies, that require close proximity to a patient who has recently had a radionuclide imaging procedure. This also impacts on other medical personnel including porters, nurses, pathologists, etc. This study was conducted in order to calculate the radiation exposure that one may anticipate receiving from a patient who has recently had a nuclear midicine procedure. Radiation dose rate (μSv/hr) was measured in 34 patients for four commonly performed nuclear medicine procedures (bone, liver/spleen, renal and thyroid) at the skin surface, 10,30,60,100, and at 150 cm from the patient, within 3 and 1hr ( 3 hrs for bone scan patients and 1 hr for the other three procedures ) postinjection, with a digital survey meter. The measurements were performed also for different sides of the patients ( anterior, posterior, left and right). For bone scans, a dose of 714.1 ± 96.2 MBq ( 19.3 ± 2.6mCi ) of technetium-99m-MDP ( 99 m Tc-MDP) resulted in a radiation exposure ( from posterior side of the patient )of ( 195±41) μSv/hr at the skin surface, (110±27) μSv/hr at 10cm, (51±10) μSv/hr at 30cm, (21±5) μSv/hr at 60cm, (10±2) μSv/hr at 1m, and (6±2) μSv/hr at 1.5m. Also for the bone, the radiation dose rate measurements obtained (from left side of the patient ) were 144±30) μSv/hr at the skin surface, ( 90±21) μSv/hr at 10cm, ( 36±8)μSv/hr at30cm, (15±3)μSv/hr at 60cm, (8±2)μSv/hr at 1 m,and ( 4±1)μSv/hr at 1.5m. It has been found that the variations in percentage (%) between posterior and left side mean measurments were 28.2, 18.2, 29.4, 25.0, 20.0 and 33.3 at the skin, 10cm,30cm,60cm, 100cm and 150 cm respectively. When we search for ''conservative'' values and concepts, concerning the radiation safety in nuclear medicine department , we believe that anterior and posterior sides values must be

  10. Atmospheric Ionizing Radiation (AIR) Project Review

    Science.gov (United States)

    Singleterry, R. C., Jr.; Wilson, J. W.; Whitehead, A. H.; Goldhagen, P. E.

    1999-01-01

    The National Council on Radiation Protection and Measurement (NCRP) and the National Academy of Science (NAS) established that the uncertainty in the data and models associated with the high-altitude radiation environment could and should be reduced. In response, the National Aeronautics and Space Administration (NASA) and the U.S. Department of Energy Environmental Measurements Laboratory (EML) created the Atmospheric Ionizing Radiation (AIR) Project under the auspices of the High Speed Research (HSR) Program Office at the Langley Research Center. NASA's HSR Program was developed to address the potential of a second-generation supersonic transport. A critical element focussed on the environmental issues, including the threat to crew and passengers posed by atmospheric radiation. Various international investigators were solicited to contribute instruments to fly on an ER-2 aircraft at altitudes similar to those proposed for the High Speed Civil Transport (HSCT). A list of participating investigators, their institutions, and instruments with quantities measured is presented. The flight series took place at solar minimum (radiation maximum) with northern, southern, and east/west flights. The investigators analyzed their data and presented preliminary results at the AIR Workshop in March, 1998. A review of these results are included.

  11. Investigation of Electricity Generation by Using Gamma Radiation from Spent Fuels

    International Nuclear Information System (INIS)

    Lee, Haneol; Yim, Man-Sung Yim

    2015-01-01

    The purpose of this study is to investigate the electric power generation with scale spent fuel. OrigenArp has analyzed gamma radiation environment of spent fuel assembly, MCNPX has analyzed the scintillator behavior, and experimental work has analyzed the electric output of photovoltaic cell. Gamma radiation environment analysis result indicates gamma source rapidly decreases for the early storage period. Scintillator analysis result calculates the photon flux distribution which enters photovoltaic cell. Photovoltaic cell experiment calculates electric current, voltage current generation per each system unit. Generated electric power can be used to cope with existing safety system (i.e. storage monitoring system) under severe accident or to operate security system under external invasion situation (i.e. passive physical barrier system). Several researchers have shown that converting radiation energy into electric energy is possible. Karl Scharf studied the direct electric conversion of radiation energy by using photovoltaic cells. Researchers in University of Massachusetts Lowell have studied radiation-electric energy conversion by using gadolinium oxide scintillator and dye sensitized solar cell (DSSCs) and N. Horuichi et al. studied radiation-electric energy conversion by using inorganic scintillators and amorphous and crystal photovoltaic cells

  12. Investigation of environmental natural penetrating radiation level in Anhui province

    International Nuclear Information System (INIS)

    Zhu Jingqiu; Chen Shuping; Jiang Shan; Zhu Xingsheng; Huang Jiangbin; Wu Chuanyong; Wang Weining

    1992-01-01

    The methods and results of the investigation on natural penetrating radiation level in Anhui Province in 1987 are presented. The results show that: (1) The point-weighted, area-weighted and population-weighted average value of natural γ radiation dose rate for field is 5.67, 5.62 and 5.55 x 10 -8 Gy· -1 , respectively; (2) The point-weighted average value of natural γ radiation dose rate for road is 5.38 x 10 -8 Gy·h -1 ; (3) The point-weighted and population-weighted average value of natural γ radiation dose rate inside buildings is 9.59 and 9.36 x 10 -8 Gy·h -1 , respectively; (4) The point-weighted and population-weighted average value of the dose rate inside buildings from cosmic ray is 2.64 and 2.62 x 10 -8 ·h -1 , and outside buildings is 2.95 and 2.94 x 10 -8 ·h -1 , respectively; (5) The point-weighted and population-weighted average value of natural penetrating radiation dose rate inside buildings is 12.23 and 11.99 x 10 -8 Gy·h -1 , outside buildings is 8.62 and 8.49 x 10 -8 ·h -1 , respectively; (6) The annual effective dose equivalent from natural γ radiation, cosmic ray and natural penetrating radiation is 0.51, 0.24, and 0.75 mSv, respectively; and correspondingly, the annual collective effective dose equivalent is 2.5, 1.2 and 3.7 x 10 4 man·Sv, respectively

  13. Home radiator burns among inner-city children--Chicago, September 1991-April 1994.

    Science.gov (United States)

    1996-09-27

    Contact with hot surfaces is a cause of substantial morbidity among children. In 1993, an estimated 1881 children visited emergency departments for treatment of burns related to nonvehicle radiators in the United States. This report summarizes the investigation of radiator burns among children aged 0-19 years living in a Chicago housing project and provides recommendations for preventing radiator burn injuries.

  14. Investigation of natural radiation background and assessment of its population dose in China

    International Nuclear Information System (INIS)

    1989-01-01

    This paper presents the nationwide survey in 1984-1988 of environmental external radiation by integrating measurements, and the assessment of population doses from obtained data. Thermoluminescent dosimeters (TLD) model ETLD-80 with CaSO 4 : Dy were used. The survey was conducted in two different scales. In general survey, TLDs were distributed in whole area of every investigated provinces; and in local survey, one city and one village within each province were selected and investigated for the purpose of comparison of the natural radiation levels between the rural and urban areas. A marked characteristics was noted that the level of natural environmental radiation in south China seems to be higher than that in north China. It may be attributed to the geological difference in both parts. The annual individual average and collective effective dose equivalents to population of China from natural environmental radiation were estimated to be 780 μSv and 8.1 x 10 5 man. Sv, based on the model recommended by UNSCEAR 1988 Report

  15. Investigating the management information needs of academic Heads of Department: a Critical Success Factors approach

    Directory of Open Access Journals (Sweden)

    Francis Green

    1996-01-01

    Full Text Available This paper describes a research project in the Department of Information Studies at the University of Sheffield. With funding from the British Library Research and Development Department a critical success factors-based investigation of the management information needs of academic Heads of Department in an number of English universities was undertaken in 1994/1995, following publication of the results of a pilot study byPellow and Wilson (1993. Senior academic staff, university administrators and librarians in sixteen universities were interviewed between December, 1994 and March, 1995. Collation of data and analysis of results have been completed

  16. Channeling-radiation project for Department of Energy

    International Nuclear Information System (INIS)

    Marshall, Paul

    1999-01-01

    To demonstrate the feasibility of producing and utilizing a channeling-radiation beam at a typical medical electron accelerator. The experiment consisted of two distinct stages, designing and assembling an extension to the existing beam line and running the experiment using silicon and diamond crystals

  17. Investigation of radiation-enhanced diffusions of non valency impurities in ionic crystals

    International Nuclear Information System (INIS)

    Surzhikov, A.P.; Pritulov, A.M.; Gyngazov, S.A.; Chernyavskij, A.V.

    1999-01-01

    Investigations of hetero valency ions Al +3 and Mg +2 diffusion in potassium bromide crystals, under the intensive electron radiation, were conducted. The electron accelerator ELV-6 generating a continuous electron beam of 1.4 MeV in power was used for the investigations. To discover the radiation effects, there was a comparison of outcomes of the heating under the same temperature and annealing duration values. The mass-spectrometer MS-7021M was used to measure the diffusion profiles. The experimental outcomes analysis was carried out by approximation of the experimental concentration profiles, using a relevant solution of Fick's equation. The numerical values of the diffusion factors for the set annealing temperatures were determined according to the approximation outcomes. The investigations were financed by the Russian Fundamental Research Fund

  18. Immune status investigations for radiation workers

    International Nuclear Information System (INIS)

    Obreja, D.; Tulbure, R.; Marinescu, I.

    2002-01-01

    In Romania, the enhanced development of nuclear energy leads to an increase of number of occupational exposed persons to ionizing radiation. Hence, a good knowledge of effects of ionizing radiation exposure on human body is necessary. Beginning with this decade, the opinion regarding medical surveillance of occupational exposed persons to ionizing radiation has changed - the surveillance system has to insure firstly the prevention of professional diseases. It is important to select some biological tests as helpful indicators both in immediate assessment and in health status prognosis for occupational exposed people in the future. The fact that ionizing radiation leads to immune system modifications is well known. In the last 20 years, the effect of ionizing radiation upon immune system was extensively studied, as a result of an intense research activity and of an improvement of knowledge in the field of immunology. Researches have made important steps in understanding the mechanisms of action and control for immune responses

  19. Technical advances in radiation therapy

    International Nuclear Information System (INIS)

    Sause, W.T.

    1986-01-01

    Substantial advances have been made in radiation therapy. Many of these advances can be applied in most radiation therapy departments without expensive improvements in equipment. Changes in radiation fractionation, chemotherapeutic sensitization, intraoperative radiation, and interstitial implants can be performed with experience and improved physician training in most medium-sized departments. Advances that require investments in expensive equipment such as particle radiation and hyperthermia will need to be evaluated at designated treatment centers. 106 references

  20. Investigation of environmental natural penetrating radiation level in Hubei Province

    International Nuclear Information System (INIS)

    Zhang Sihui; Zhang Jiaxian

    1992-01-01

    The methods and results of the investigation on natural penetrating radiation level in Hubei Province are presented, 290 measuring points of 25 x 25 km-grid were set uniformly up all over the province, with 385 densely measuring points of different types added. The results show that: (1) The area-weighted, population-weighted and point-weighted average value of natural γ radiation dose rate for field is 60.8, 58.5 and 60.9 nGy ·h -1 , respectively; (2) The point-weighted average value of natural γ radiation dose rate for road is 55.3 nGy·h -1 ; (3) The population-weighted and point-weighed average value of natural γ radiation dose rate inside buildings is 94.5 and 93.2 x 10 nGy·h -1 , respectively; (4) The point-weighted and population-weighted average value of the dose rate inside buildings from cosmic ray is 27.8 and 26.3 nGy·h -1 , and outside buildings is 31.8 and 30.4 nGy·h -1 , respectively; (5) The point-weighted and population-weighted average value of natural penetrating radiation dose rate inside building is 121.0 and 120.7 nGy·h -1 , outside buildings is 92.8 and 88.9 nGy·h -1 , respectively; (6) The annual effective dose equivalent from cosmic ray, natural γ radiation and natural penetrating radiation is 0.24, 0.52 and 0.76 mSv, respectively; and correspondingly, the annual collective effective dose equivalent is 1.2, 2.5 and 3.7 x 10 4 man·Sv, respectively

  1. Investigation of environmental natural penetrating radiation level in Heilongjiang Province

    International Nuclear Information System (INIS)

    Liu Yuncheng; Wu Chengxiang; Zhang Juling; Zhao Defeng

    1994-01-01

    The methods and results of the investigation on natural penetrating radiation level in Heilongjiang Province are presented. 221 25 km x 25 km-grid measuring points were set uniformly up all over the province, with 555 densely measuring points of different types added. The results show that: (1)The area-weighted, population-weighted and point-weighted average value of natural γ radiation dose rate for field is 53.5, 58.5 and 54.2 nGy·h -1 , respectively; (2) The point-weighted average value of natural γ radiation dose rate for road is 58.4 nGy·h -1 ; (3) The population-weighted and point-weighted average value of natural γ radiation dose rate inside buildings is 85.2 and 78.9 nGy·h -1 , respectively; (4) The point-weighted and population-weighted average value of the dose rate inside buildings from cosmic ray is 28.6 and 28.1 nGy·h -1 , and outside buildings is 32.4 and 32.2 nGy·h -1 , respectively; (5) The point-weighted and population-weighted average value of natural penetrating radiation dose rate inside buildings is 109.7 and 112.8 nGy·h -1 , outside buildings is 84.8 and 91.0 nGy·h -1 , respectively; (6) The annual effective dose equivalent from cosmic ray, natural γ radiation and natural penetrating radiation is 0.26, 0.48 and 0.73 mSv, respectively; and correspondingly, the annual collective effective dose equivalent is 0.8 x 10 4 , 1.6 x 10 4 and 2.4 x 10 4 man·Sv, respectively

  2. Investigation of environmental natural penetrating radiation level in Jiangsu province

    International Nuclear Information System (INIS)

    Liu Ming; Wang Chengbao.

    1993-01-01

    The methods and results of in investigation on natural penetrating radiation level in Jiangsu Province are presented. 182 25 km x 25 km-grid measuring points were set up uniformly all over the province, with 236 densely measuring points of different types added. The results show that: (1) The area-weighted, population-weighted and point-weighted average value of natural γ radiation dose rate for field is 50.3, 50.6 and 50.4 nGy · h -1 , respectively; (2) The point-weighted average value of natural γ radiation dose rate for road is 47.1 nGy · h -1 ; (3) The population-weighted and point-weighted average value of natural γ radiation dose rate inside buildings is 89.7 and 89.2 nGy · h -1 , respectively; (4) The point-weighted and population-weighted average value of the dose rate inside buildings from cosmic ray is 26.0 and 25.8 nGy · h -1 , and outside buildings is 29.2 and 29.1 nGy · h -1 , respectively; (5) The point-weighted and population-weighted average value of natural penetrating radiation dose rate inside buildings is 115.1 and 115.5 nGy · h -1 , outside buildings is 79.5 and 79.7 nGy · h -1 , respectively; (6) The annual effective dose equivalent from cosmic ray, natural γ radiation and natural penetrating radiation is 0.23, 0.48 and 0.71 mSv, respectively; and correspondingly, the annual collective effective dose equivalent is 3.0, 1.5 and 4.5 x 10 4 man · Sv, respectively

  3. Investigation of environmental natural penetrating radiation level in Shaanxi Province

    International Nuclear Information System (INIS)

    Zhang Chunfang; Li Jiyin

    1994-01-01

    The methods and results of the investigation on natural penetrating radiation level in Shaanxi Province are presented. 359 25 km x 25 km-grid measuring points were set uniformly up all over the province, with 433 densely measuring points of different types added. The results show that: (1) The area-weighted, population-weighted and point-weighted average value of natural γ radiation dose rate for field is 62.0, 63.0 and 61.0 nGy·h -1 , respectively; (2) The point-weighted average value of natural γ radiation dose rate for road is 63.0 nGy · h -1 ; (3)The population-weighted and point-weighted average value of natural γ radiation dose rate inside buildings is 100.0 and 98.0 nGy·h -1 , respectively; (4)The point-weighted and population-weighted average value of the dose rate inside buildings from cosmic ray is 32.0 and 31.0 nGy·h -1 , and outside buildings is 37.0 and 36.0 nGy·h -1 , respectively; (5)The point-weighted and population-weighted average value of natural penetrating radiation dose rate inside buildings is 130.0 and 131.0 nGy·h -1 , outside buildings is 130.0 and 130.0 nGy·h -1 , respectively; (6)The annual effective dose equivalent from cosmic ray, natural γ radiation and natural penetrating radiation is 0.55, 0.28 and 0.83 mSv, respectively; and correspondingly, the annual collective effective dose equivalent is 1.63, 0.83 and 2.46 x 10 4 man·Sv, respectively

  4. Investigation on a radiation tolerant betavoltaic battery based on Schottky barrier diode

    International Nuclear Information System (INIS)

    Liu Yebing; Hu Rui; Yang Yuqing; Wang Guanquan; Luo Shunzhong; Liu Ning

    2012-01-01

    An Au–Si Schottky barrier diode was studied as the energy conversion device of betavoltaic batteries. Its electrical performance under radiation of Ni-63 and H-3 sources and radiation degradation under Am-241 were investigated and compared with those of the p–n junction. The results show that the Schottky diode had a higher I sc and harder radiation tolerance but lower V oc than the p–n junction. The results indicated that the Schottky diode can be a promising candidate for energy conversion of betavoltaic batteries. - Highlights: ► The Schottky diode was used as the converter of the betavoltaic battery. ► The radiation damage of converter was accelerated by using alpha particles. ► The Schottky diode has higher radiation resistance than that of the p–n junction. ► The Schottky diode could still be a promising converter of the betavoltaic battery.

  5. EPR spectral investigation of radiation-induced radicals of gallic acid

    Energy Technology Data Exchange (ETDEWEB)

    Tuner, Hasan [Balikesir University, Department of Physics, Faculty of Art and Science, Balikesir (Turkey)

    2017-11-15

    In the present work, spectroscopic features of the radiation-induced radicals of gallic acid compounds were investigated using electron paramagnetic resonance (EPR) spectroscopy. While un-irradiated samples presented no EPR signal, irradiated samples exhibited an EPR spectrum consisting of an intense resonance line at the center and weak lines on both sides. Detailed microwave saturation investigations were carried out to determine the origin of the experimental EPR lines. It is concluded that the two side lines of the triplet satellite originate from forbidden ''spin-flip'' transitions. The spectroscopic and structural features of the radiation-induced radicals were determined using EPR spectrum fittings. The experimental EPR spectra of the two gallic acid compounds were consistent with the calculated EPR spectroscopic features of the proposed radicals. It is concluded that the most probable radicals are the cyclohexadienyl-type, O(OH){sub 2}C{sub 6}H{sub 2}COOH radicals for both compounds. (orig.)

  6. EPR spectral investigation of radiation-induced radicals of gallic acid

    International Nuclear Information System (INIS)

    Tuner, Hasan

    2017-01-01

    In the present work, spectroscopic features of the radiation-induced radicals of gallic acid compounds were investigated using electron paramagnetic resonance (EPR) spectroscopy. While un-irradiated samples presented no EPR signal, irradiated samples exhibited an EPR spectrum consisting of an intense resonance line at the center and weak lines on both sides. Detailed microwave saturation investigations were carried out to determine the origin of the experimental EPR lines. It is concluded that the two side lines of the triplet satellite originate from forbidden ''spin-flip'' transitions. The spectroscopic and structural features of the radiation-induced radicals were determined using EPR spectrum fittings. The experimental EPR spectra of the two gallic acid compounds were consistent with the calculated EPR spectroscopic features of the proposed radicals. It is concluded that the most probable radicals are the cyclohexadienyl-type, O(OH) 2 C 6 H 2 COOH radicals for both compounds. (orig.)

  7. Three example applications of optimization techniques to Department of Energy contractor radiation protection programs

    International Nuclear Information System (INIS)

    Merwin, S.E.; Martin, J.B.; Tawil, J.J.; Selby, J.M.

    1989-01-01

    Six numerical examples of optimization of radiation protection are provided in the appendices of International Commission on Radiological Protection (ICRP) Publication No. 37 (1983). In each case, the calculations were based on well-defined parameters and assumptions. In this paper, we examined three different numerical examples that were based on empirical data and less-certain assumptions. In the first example, the optimum sampling frequency for a typical 3H bioassay program was found to be once every 2 mo. However, this result depended on assumed values for several variables that were difficult to evaluate. The second example showed that the optimum frequency for recalibrating a group of cutie pie (CP) ionization chamber survey instruments was once every 85 d. This result depended largely on the assumption that an improperly operating CP instrument could lead to a serious overexposure. In the third example, one continuous air monitor (CAM) was determined to be the optimum number in a workplace at a Department of Energy (DOE) Pu facility. The optimum location of the CAM was determined from past glove-box release studies. These examples demonstrated that cost-benefit analysis of individual elements of radiation protection programs can be useful even if limited data are available

  8. Investigations of aircrews exposure to cosmic radiation - results, conclusions and suggestions

    CERN Document Server

    Bilski, P; Horwacik, T; Marczewska, B; Ochab, E; Olko, P

    2002-01-01

    In frame of a research project undertaken in collaboration with Polish airlines LOT, analysis of aircrews exposure to cosmic radiation has been performed. The applied methods included measurements of radiation doses with thermoluminescent detectors (MTS-N, MCP-N) and track detectors (CR-39) and also calculations of route doses with the CARI computer code. The obtained results indicate that aircrews of nearly all airplanes, with exception of these flying only on ATR aircraft, exceed regularly or may exceed in some conditions, effective doses of 1 mSv. In case of Boeing-767 aircrews such exceeding occurs always, independently of solar activity. Investigations revealed, that during these periods of the solar cycle, when intensity of cosmic radiation is high, exceeding of 6 mSv level is also possible. These results indicate, that according to Polish and European regulations it is necessary for airlines to provide regular estimations of radiation exposure of aircrews. Basing on the obtained results a system for pe...

  9. Investigation of environmental natural penetrating radiation level in Hebei province

    International Nuclear Information System (INIS)

    Zheng Deliang; Wang Shuming; Yang Huanfeng

    1990-01-01

    The methods and results of the investigation on natural penetrating radiation level in Hebei Province from 1985 to 1987 are presented. 285 25 x 25 km-netted measuring points were set unformly up all over the porvince, with 204 densely measuring points of different types added. The results show that: (1) The point-weighted, area-weighted and population-weighted average value of natural γ radiation dose rate for field is 5.59, 5.51 and 5.31 x 10 -8 Gy·h -1 , respectively; (2) The point-weighted and population-weighted average value of the dose rate inside buildings from cosmic ray is 3.05 and 2.80 x 10 -8 Gy·h -1 , and outside buildings is 3.38 and 3.11 x 10 -8 Gy·h -1 , respectively; (3) The point-weighted and population-weighted average value of natural penetrating radiation dose rate inside buildings is 12.44 and 11.97 x 10 -8 Gy·h -1 , outside buildings is 8.97 and 8.42 x 10 -8 Gy·h -1 , respectively; (4) The annual effective dose equivalent from natural γ radiation, cosmic ray and natural penetrating radiation is 0.50, 0.25, and 0.75 mSv, respectively; and correspondingly, the annual collective effectiv dose equivalent is 2.7, 1.3 and 4.0 x 10 4 man·Sv, respectively

  10. Department of Training and Consulting - Overview

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    2009-01-01

    Full text: The Department of Training and Consulting regularly serves secondary schools pupils and teachers, university students and the public. Almost 6600 visitors, mainly students from secondary schools in Poland, visited the Department. In addition to regular lectures, demonstrations, visits to the reactor MARIA and two current exhibitions (on nuclear waste and the WWER reactor model), several laboratory experiments have been organized for secondary schools. A one-day summer workshop on '' Basics of nuclear radiation, its properties and use in science, technology and medicine '' offered secondary school teachers a general understanding of the problems connected with radioactivity. The Department is constantly developing experiments that can be conducted by students of secondary schools and universities, as well as by professionals. At the moment, there are about 25 experiments available for the guests of the Department. They cover the measurement of lifetimes, essential elements of radioprotection, absorption of radiation in various materials, excitation of fluorescence radiation, influence of magnetic fields on beta radiation as well as on electrons emitted from a typical electron gun, Compton scattering and elements of gamma spectroscopy, search for radioactive pollutions etc. Three experiments were modernized to enable them to be conducted over the Internet. This project is a bit delayed but should be finished by the end of April 2009. For the third time the Department organized (together with the Institute of Physics of the Polish Academy of Sciences, Warsaw) '' The Physical Pathways '' competition for secondary school students. The students could choose one of three possibilities (even all of them): either to submit a scientific paper, to present a demonstration of a physical phenomenon, or to write an essay on the connection between physics and the development of civilization. They could also submit work prepared by a team of up to three persons. The

  11. An investigation into the actual condition of radiation safety control

    International Nuclear Information System (INIS)

    Katsurayama, Kosuke

    1976-01-01

    The result of investigation on the real condition of radiation safety control is reported with some considerations. The investigation was made in April, 1975, by means of questionnaires to 418 companies, and the responses were obtained from 126 companies, i.e. 11 research laboratories, 98 manufacturing factories, and 17 inspection facilities. The average integrated dose in the inspection facilities was 0.91 rem/year, the most among three. The exposure dose in most of the research laboratories and manufacturing factories investigated was within the limit of 0.5 rem/year, and that in the inspection facilities was distributed over from the background level to 5 rem/year. The ratios of the workers engaged in radiation operation and the workers possessing the licences related to non-destructive examination to all employees were investigated, but they were not at satisfactory level. Regarding the abandonment of radioactive isotopes, 63.5% of the companies answered deliver the radioactive isotopes to be abandoned to Japan Isotope Association, and 25.7% let equipment makers to take them back. As for the education and training of operators for the safe treatment of radioactive substances and the prevention of accidents, most of the companies answered gave the education once or twice a year, and to those who just entered the companies, but more substantial education in desirable. (Nishino, S.)

  12. A method for radiobiological investigations in radiation fields with different LET and high dose rates

    International Nuclear Information System (INIS)

    Grundler, W.

    1976-01-01

    For investigations: 1. Performed in the field of radiobiology with different LET-radiation and a relatively high background dose rate of one component (e.g. investigations with fast and intermediate reactor neutrons) 2. Concerning radiation risk studies within a wide range 3. Of irradiations, covering a long time period (up to 100 days) a test system is necessary which on the one hand makes it possible to analyze the influence of different LET radiation and secondly shows a relative radiation resistant behaviour and allows a simple cell cycle regulation. A survey is given upon the installed device of a simple cell observation method, the biological test system used and the analysis of effects caused by dose, repair and LET. It is possible to analyze the behaviour of the nonsurvival cells and to demonstrate different reactions of the test parameters to the radiation of different LET. (author)

  13. Radiation control standards and procedures

    Energy Technology Data Exchange (ETDEWEB)

    1956-12-14

    This manual contains the Radiation Control Standards'' and Radiation Control Procedures'' at Hanford Operations which have been established to provide the necessary control radiation exposures within Irradiation Processing Department. Provision is also made for including, in the form of Bulletins'', other radiological information of general interest to IPD personnel. The purpose of the standards is to establish firm radiological limits within which the Irradiation Processing Department will operate, and to outline our radiation control program in sufficient detail to insure uniform and consistent application throughout all IPD facilities. Radiation Control Procedures are intended to prescribe the best method of accomplishing an objective within the limitations of the Radiation Control Standards. A procedure may be changed at any time provided the suggested changes is generally agreeable to management involved, and is consistent with department policies and the Radiation Control Standards.

  14. Experimental investigation of 1 GW repeatable ultra-wide band pulse radiating source

    International Nuclear Information System (INIS)

    Meng Fanbao; Ma Hongge; Zhou Chuanming; Yang Zhoubing; Lu Wei; Ju Bingquan; Yu Huilong

    2001-01-01

    The single cycle pulse of 1.6 GW peak power with 20 Hz repetition-rate was generated. It radiated a peak power of more than 500 MW with a coaxial biconical antenna. The technological problems of the insulation and energy loss during generating and radiating high peak power ultra-wide band (UWB) pulse have been resolved. The experiments show that the material insulation and dispersion in sub-nanosecond pulse should be investigated deeply

  15. Experimental investigation of 1 GW repeatable ultra-wide band pulse radiating source

    Energy Technology Data Exchange (ETDEWEB)

    Fanbao, Meng; Hongge, Ma; Chuanming, Zhou; Zhoubing, Yang; Wei, Lu; Bingquan, Ju; Huilong, Yu [China Academy of Engineering Physics, Chengdu (China)

    2000-11-01

    The single cycle pulse of 1.6 GW peak power with 20 Hz repetition-rate was generated. It radiated a peak power of more than 500 MW with a coaxial biconical antenna. The technological problems of the insulation and energy loss during generating and radiating high peak power ultra-wide band (UWB) pulse have been resolved. The experiments show that the material insulation and dispersion in subnanosecond pulse should be investigated deeply.

  16. Department of Radiation and Environmental Biology - Overview

    International Nuclear Information System (INIS)

    Cebulska-Wasilewska, A.

    2002-01-01

    Full text: The year 2001 started for us with new demanding tasks connected with participation in a new research project performed in collaboration with a excellent teams from six countries under the 5 th EU the Quality of Life Programme. The aim of the project EXPAH is to propose methods of molecular epidemiology for the risk assessment of exposure to polycyclic aromatic hydrocarbons in the air. The exploration of cause-effect relationships for carcinogenic agents will be based on the study of exogenous and endogenous influence on DNA damage in exposed population, and will determine the relationship between biomarkers of exposure, effects and susceptibility in the exposed populations. Analysis of this damage is carried out using highly specialising multidisciplinary techniques brought together by seven laboratories specialised in chemical, biochemical and biological techniques for analysing DNA damage and repair, together with access to populations exposed to environmental pollution and experience in collecting samples. In the year 2001 all the members of the department put much effort in co-organizing 12. Meeting of the Maria Sklodowska-Curie Polish Radiation Research Society. The Meeting was held in the September in Cracow and rewarded hard work of everybody with many applauding comments for the high scientific and organization level. Our parallel activities were concentrated on arrangement and preparation of the forthcoming Course on Human Monitoring for Genetic Effects proposed to us by the Alexander Hollaender Committee of the International Environmental Mutagenesis Society. The Alexander Hollaender ''HUMOGEF'' Course will concentrate on the commonly measured biomarkers (chromosome aberrations; micronuclei; DNA damage), but others (p53 protein levels; metabolic genotypes) will also be addressed. Scientists of international standing from the fields of toxicology, molecular biology, cytogenetics, mutation, and epidemiology, will present and discuss the state

  17. Occupational radiation exposures in canada-1983

    International Nuclear Information System (INIS)

    Fujimoto, K.; Wilson, J.A.; Ashmore, J.P.; Grogan, D.

    1984-08-01

    This is the sixth in a series of annual reports on Occupational Radiation Exposures in Canada. The information is derived from the National Dose Registry of the Radiation Protection Bureau, Department of National Health and Welfare. As in the past this report presents by occupation: average yearly whole body doses by region, dose distributions, and variations of the average doses with time. The format has been changed to provide more detailed information regarding the various occupations. Statistical data concerning investigations of high exposures reported by the National Dosimetry Services are tabulated in summary form

  18. High dose radiation damage in nuclear energy structural materials investigated by heavy ion irradiation simulation

    International Nuclear Information System (INIS)

    Zheng Yongnan; Xu Yongjun; Yuan Daqing

    2014-01-01

    Structural materials in ITER, ADS and fast reactor suffer high dose irradiations of neutrons and/or protons, that leads to severe displacement damage up to lOO dpa per year. Investigation of radiation damage induced by such a high dose irradiation has attracted great attention along with the development of nuclear energy facilities of new generation. However, it is deeply hampered for the lacking of high dose neutron and proton sources. Irradiation simulation of heavy ions produced by accelerators opens up an effective way for laboratory investigation of high dose irradiation induced radiation damage encountered in the ITER, ADS, etc. Radiation damage is caused mainly by atomic displacement in materials. The displacement rate of heavy ions is about lO 3 ∼10 7 orders higher than those of neutrons and protons. High displacement rate of heavy ions significantly reduces the irradiation time. The heavy ion irradiation simulation technique (HIIS) technique has been developed at China Institute of Atomic Energy and a series of the HIIS experiments have been performed to investigate radiation damage in stainless steels, tungsten and tantalum at irradiation temperatures from room temperature to 800 ℃ and in the irradiation dose region up to 100 dpa. The experimental results show that he radiation swelling peak for the modified stainless steel appears in the temperature region around 580 ℃ and the radiation damage is more sensitive to the temperature, the size of the radiation induced vacancy cluster or void increase with the increasing of the irradiation dose, and among the three materials the home-made modified stainless steel has the best radiation resistant property. (authors)

  19. Results of the studies of radiation ecology and radiation biology at the Institute of Biology of Komi Science Centre, Ural Division of Russian Academy of Sciences. (On the 40th anniversary of the radiation ecology department)

    International Nuclear Information System (INIS)

    Taskaev, A.I.; Kudyasheva, A.G.; Popova, O.N.; Materij, L.D.; Shuktomova, I.I.; Frolova, N.P.; Kozubov, G.M.; Zajnullin, V.G.; Ermakova, O.V.; Rakin, A.O.; Bashlykova, L.A.

    2000-01-01

    Materials on the history of foundation of the radiation Ecology Department at the Institute of Biology of the Komi Science Centre of the Russian Academy of Sciences on the occasion of its 40-th anniversary are presented. The results of studies on radiation effects in low doses on the plant and animal populations as well as on radionuclide migration in natural biogeocenoses by increased radiation levels are analyzed. The performed complex studies were used as the basis for developing methodological approaches to the solution of a number of problems on the surface radioecology. Multiyear studies on the biogeocenoses of increased radioactivity of different origin made it possible to obtain multiple materials, indicating high diversity and specificity of reaction of living organisms in response to the background low level chronic irradiation. Attention was paid to studies on the Komi contamination by atmospheric radioactive fall-outs as well as to studies on the consequences of radioactive contamination of the Ukrainian Polesje due to the Chernobyl accident [ru

  20. An investigation of medical radiation detection using CMOS image sensors in smartphones

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Han Gyu [Department of Senior Healthcare, Graduate School of Eulji University, Daejeon 301-746 (Korea, Republic of); Song, Jae-Jun [Department of Otorhinolaryngology-Head & Neck Surgery, Korea University, Guro Hospital,148, Gurodong-ro, Guro-gu, Seoul 152-703 (Korea, Republic of); Lee, Kwonhee [Graduate Program in Bio-medical Science, Korea University, 2511 Sejong-ro, Sejong City 339-770 (Korea, Republic of); Nam, Ki Chang [Department of Medical Engineering, College of Medicine, Dongguk University, 32 Dongguk-ro, Goyang-si, Gyeonggi-do 410-820 (Korea, Republic of); Hong, Seong Jong; Kim, Ho Chul [Department of Radiological Science, Eulji University, 553 Yangji-dong, Sujeong-gu, Seongnam-si, Gyeonggi-do 431-713 (Korea, Republic of)

    2016-07-01

    Medical radiation exposure to patients has increased with the development of diagnostic X-ray devices and multi-channel computed tomography (CT). Despite the fact that the low-dose CT technique can significantly reduce medical radiation exposure to patients, the increasing number of CT examinations has increased the total medical radiation exposure to patients. Therefore, medical radiation exposure to patients should be monitored to prevent cancers caused by diagnostic radiation. However, without using thermoluminescence or glass dosimeters, it is hardly measure doses received by patients during medical examinations accurately. Hence, it is necessary to develop radiation monitoring devices and algorithms that are reasonably priced and have superior radiation detection efficiencies. The aim of this study is to investigate the feasibility of medical dose measurement using complementary metal oxide semiconductor (CMOS) sensors in smartphone cameras with an algorithm to extract the X-ray interacted pixels. We characterized the responses of the CMOS sensors in a smartphone with respect to the X-rays generated by a general diagnostic X-ray system. The characteristics of the CMOS sensors in a smartphone camera, such as dose response linearity, dose rate dependence, energy dependence, angular dependence, and minimum detectable activity were evaluated. The high energy gamma-ray of 662 keV from Cs-137 can be detected using the smartphone camera. The smartphone cameras which employ the developed algorithm can detect medical radiations.

  1. An investigation of medical radiation detection using CMOS image sensors in smartphones

    International Nuclear Information System (INIS)

    Kang, Han Gyu; Song, Jae-Jun; Lee, Kwonhee; Nam, Ki Chang; Hong, Seong Jong; Kim, Ho Chul

    2016-01-01

    Medical radiation exposure to patients has increased with the development of diagnostic X-ray devices and multi-channel computed tomography (CT). Despite the fact that the low-dose CT technique can significantly reduce medical radiation exposure to patients, the increasing number of CT examinations has increased the total medical radiation exposure to patients. Therefore, medical radiation exposure to patients should be monitored to prevent cancers caused by diagnostic radiation. However, without using thermoluminescence or glass dosimeters, it is hardly measure doses received by patients during medical examinations accurately. Hence, it is necessary to develop radiation monitoring devices and algorithms that are reasonably priced and have superior radiation detection efficiencies. The aim of this study is to investigate the feasibility of medical dose measurement using complementary metal oxide semiconductor (CMOS) sensors in smartphone cameras with an algorithm to extract the X-ray interacted pixels. We characterized the responses of the CMOS sensors in a smartphone with respect to the X-rays generated by a general diagnostic X-ray system. The characteristics of the CMOS sensors in a smartphone camera, such as dose response linearity, dose rate dependence, energy dependence, angular dependence, and minimum detectable activity were evaluated. The high energy gamma-ray of 662 keV from Cs-137 can be detected using the smartphone camera. The smartphone cameras which employ the developed algorithm can detect medical radiations.

  2. Investigation of environmental natural penetrating radiation level in inner mongolia

    International Nuclear Information System (INIS)

    Li Wenyuan; Du Xuelin; Zhang Baozhong; Fu Su; Chen Jun; Zhang Wenhai

    1990-01-01

    The scheme, quality assurance measure, and results for environmental natural penetrating radiation level investigation in Inner Mongolia Autonomous Region was reported. Over the whole Region area of more than 1.18 million km 2 , 1018 net grid measuring points were selected with grid spacing of 25 x 25 km. The range of natural environmental terrestrial γ-radiation air absorbed dose rate over fields was (0.96-18.62) x 10 -8 Gy·h -1 , the range of γ-radiatoin dose rate over road was (1.07-26.08) x 10 -8 Gy·h -1 , the mean was 5.92 x 10 -8 Gy·h -1 ; the range of γ-radiation dose rate in buildings was (3.82-18.94) x 10 -8 Gy·h -1 ; the range of outdoor air absorbed dose rate caused by ionization compnents of cosmic rays was (3.12-5.55) x 10 -8 Gy·h -1 , while indoor range was (2.60-4.66) x 10 -8 Gy·h -1 ; the range of outdoor natural penetrating radiation dose rate was (8.31-11.26) x 10 -8 Gy·h -1 , indoor range was (11.20-14.67) x 10 -8 Gy·h -1 ; annual average individual effective dose equivalent and annual collective effective dose equivalent caused by natural penetrating radiatoin were 0.84 mSv and 1.61 x 10 4 man·Sv respectively. The georgaphical distribution of terrestrial γ-radiation dose rate within all region was reprted, the increase of environmental terrestial γ-radiation caused by human activity was also pointed. This ought to be paid enough attention to

  3. Annual report 1987 Materials Department

    International Nuclear Information System (INIS)

    1989-01-01

    Review of the activities performed by the Materials Department of the National Atomica Energy Commission of the Argentine Republic during the year 1987. The Department provides services and assistance in all matters related to metallography and special techniques, corrosion and materials' transport, transport phenomena, casting and solidification, damage by radiation, thermomechanical treatments, mechanical properties, fatigue and fracture, multinational project of research and development in materials, VII course on metallurgy and technology of materials. Likewise, information on the Materials Department's staff, its publications, projects and agreements, seminars, courses and conferences during 1987 is included [es

  4. Mechanisms of radiation interaction with DNA: Potential implications for radiation protection

    International Nuclear Information System (INIS)

    Sinclair, W.K.; Fry, R.J.M.

    1987-01-01

    An overview of presentations and discussions which took place at the US Department of Energy/Commission of European Communities (DOE/CEC) workshop on ''Mechanisms of Radiation Interaction with DNA: Potential Implications for Radiation Protection,'' held at San Diego, California, January 21-22, 1987, is provided. The Department has traditionally supported fundamental research on interactions of ionizing radiation with different biological systems and at all levels of biological organization. The aim of this workshop was to review the base of knowledge in the area of mechanisms of radiation action at the DNA level, and to explore ways in which this information can be applied to the development of scientifically sound concepts and procedures for use in the field of radiation protection

  5. Eye exposure to optical radiation in the glassblowing industry: an investigation in southern Ontario.

    Science.gov (United States)

    Oriowo, O M; Chou, B R; Cullen, A P

    2000-01-01

    To investigate if the levels of optical radiation hazards in glassblowing are well classified according to the hazard types defined in the Canadian Standards Association (CSA) standard for industrial eye protectors. We carried out radiometric measurements, and questionnaire survey in 4 university glassblowing laboratories, and 3 private studios. There is exposure to low levels of UV and IR radiation in all glassblowing operations. A supra-threshold IR radiation level exists in the craft glassblowing. The use of eye protectors is based on past experience regardless of the level of ocular exposure. Optical radiation hazards exist in both craft and scientific glassblowing. There seems to be an inadequate understanding about radiation types encountered by glassblowers.

  6. Preliminary analysis of radiologic consequence in accident cases with radiation sources in laboratories of the Physics Department of the IEN, cyclotrons and laboratories annexed

    International Nuclear Information System (INIS)

    Fajardo, P.W.; Silva, J.J.G. da.

    1987-03-01

    The requirements necessaries to the elaboration of the situation of Emergency PLans of the Nuclear Engineering Institute (IEN), Brazil, in particular, cases of radiation emergency are presented. An estimate of radiation in the laboratories of the Physic Department of the IEN, in case of accident, are given. The results presented are based in some hypothesis, values of radionuclide activity furnished by Radioisotopes Division and values of activities estimated by Radiation Protection Section of the IEN in function of datas achieved with cyclotron Division. The dose calculations are done to the cases of radionuclides inhalation and immersion of person in a semi-infinite cloud of contaminants. (V.R.B.)

  7. Characterisation of ionisation chambers for a mixed radiation field and investigation of their suitability as radiation monitors for the LHC.

    Science.gov (United States)

    Theis, C; Forkel-Wirth, D; Perrin, D; Roesler, S; Vincke, H

    2005-01-01

    Monitoring of the radiation environment is one of the key tasks in operating a high-energy accelerator such as the Large Hadron Collider (LHC). The radiation fields consist of neutrons, charged hadrons as well as photons and electrons with energy spectra extending from those of thermal neutrons up to several hundreds of GeV. The requirements for measuring the dose equivalent in such a field are different from standard uses and it is thus necessary to investigate the response of monitoring devices thoroughly before the implementation of a monitoring system can be conducted. For the LHC, it is currently foreseen to install argon- and hydrogen-filled high-pressure ionisation chambers as radiation monitors of mixed fields. So far their response to these fields was poorly understood and, therefore, further investigation was necessary to prove that they can serve their function well enough. In this study, ionisation chambers of type IG5 (Centronic Ltd) were characterised by simulating their response functions by means of detailed FLUKA calculations as well as by calibration measurements for photons and neutrons at fixed energies. The latter results were used to obtain a better understanding and validation of the FLUKA simulations. Tests were also conducted at the CERF facility at CERN in order to compare the results with simulations of the response in a mixed radiation field. It is demonstrated that these detectors can be characterised sufficiently enough to serve their function as radiation monitors for the LHC.

  8. Final report from the Spanish Society of Radiotherapy and Oncology Infrastructures Commission about department standards recommendable in radiation oncology

    International Nuclear Information System (INIS)

    Esco, R.; Pardo, J.; Palacios, A.; Biete, A.; Fernandez, J.; Valls, A.; Herrazquin, L.; Roman, P.; Magallon, R.

    2001-01-01

    The publication of the Royal Decree 1566/1988 of July 17 th , about Quality Assurance and Control in Radiation Therapy, mandates the elaboration of protocols in Radiation Therapy. Those protocols must contemplate the material and human resources necessary to implement a quality practical radiation therapy according to law. In order to establish norms regarding human and material resources, it is necessary to establish beforehand some patient care standards that serve as a frame of reference to determine the resources needed for each procedure. Furthermore, the necessary coordination of resources, material and humans that have to be present in a correct patient care planning, mandates the publication of rules that are easy to interpret and follow up. In this direction, both editions of the 'White Book of Oncology in Spain', the 'GAT Document for Radiotherapy', and the rules edited by the Committee of Experts in Radiation Therapy of the Academy of Medical Sciences of Catalunya and Balears, have represented an important advance in the establishment of these criteria in Spain. The Spanish Society of Radiation Therapy and Oncology (AERO), in an attempt to facilitate to all its associates and the health authorities some criteria for planning and implementing resources, requested its Commission of Infrastructures to elaborate a set of rules to determine the necessary resources in each radiation therapy procedure. The objective of this document is to establish some recommendations about the minimal necessities of treatment units and staff, determining their respective work capabilities, to be able to develop a quality radiation therapy in departments already existing. In summary, it is intended that the patient care is limited in a way that quality is not affected by patient overload. Also it tries to offer the Public Administration some planning criteria useful to create the necessary services of Radiation Oncology, with the adequate resources, which will bring a

  9. Investigation of Radiation Fields at Aircraft Altitudes (invited paper)

    International Nuclear Information System (INIS)

    O'Sullivan, D.; Bartlett, D.; Grillmaier, R.; Heinrich, W.; Lindborg, L.; Schraube, H.; Silari, M.; Tommasino, L.; Zhou, D.

    2000-01-01

    Cosmic rays are believed to originate from several possible sources and recent research suggests that the bulk originate from the gas and dust of the interstellar medium and are accelerated by strong shock waves driven by supernova explosions. Cosmic ray particles are made up of γ98.5% hydrogen and helium and only 1.5% have charges greater than 2. Their average energy is about 1 GeV/nucleon and they lose energy through ionisation interactions and nuclear interactions with atoms of air as they penetrate deeply into the Earth's atmosphere. A very complicated radiation field develops as particles are generated by successive interaction of primary and secondary nuclei and a cascade of hadrons is produced in the atmosphere. The intensity of particles reaches a maximum at about 20 km above sea level (γ60 g.cm -2 ). The relative abundances of different particles change with depth within the atmosphere and mainly muons which are the decay products of charged mesons, reach sea level because of their weak interaction. The radiation field produced and consequently its effect on aircrew and frequent travellers is a matter of some concern. This paper outlines the results of investigations carried out to determine the characteristics of this radiation field and assess its impact on aircrew. (author)

  10. Department of Training and Consulting - Overview

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    2008-01-01

    Full text: The Department of Training and Consulting is regularly serving secondary schools' pupils and teachers, university students and the public. As usual, we have been visited by over 5000 visitors, mainly students from secondary schools in Poland. In this contest, it is worth to mention the organization of the two 3-days Workshops '' On the nuclear energy from the very basics '', aimed to offer the teachers of secondary schools general understanding of the problems connected with nuclear energy. The Workshops were organized in collaboration with the International Atomic Energy Agency and Polish Atomic Agency. Also two other one-day courses on the nuclear radiation were organized for teachers from rather remote parts of Poland. In the teachers' opinion all these events were very successful. The Department is constantly developing experiments that can be conducted by students of secondary schools and universities, as well as by professionals. At the moment there are about 20 experiments available for the guests of the Department. They cover the measurements of lifetimes, essential elements of radioprotection, absorption of radiation in various materials, excitation of fluorescence radiation, influence of magnetic field on beta radiation as well as on electrons emitted from a typical electron gun, Compton scattering and elements of gamma spectroscopy, search for radioactive pollutions etc. A new task of preparing some experiments to be driven through the internet was put forward. It is hoped that this project will end within 2008. For the second time the Department has organized (together with the Institute of Physics of the Polish Academy of Sciences, Warsaw) '' The Physical Pathways '' competition for the students of secondary schools. The students could choose one of three possibilities (even all of them): either to submit a scientific paper, or to present demonstration of a physical phenomena, or to write an essay on the connection between physics and the

  11. Measurement of anatomy contouring in EPI review: a practical method for use in radiation therapy departments

    International Nuclear Information System (INIS)

    Halkett, Georgia; Williams, Marie

    2004-01-01

    Radiation therapy treatment verification can be performed using hard copy portal films or digital Electronic Portal Images (EPI) of the treatment field, acquired at the time of treatment. This paper describes a practical method of assessing the accuracy of reference anatomy outlining, for treatment sites involving the pelvis, breast and lumbar spine. Seven original bone anatomy outlines contoured onto verification images of five patients, were printed on transparency sheets and reference points were marked at equal distances along the anatomy curves. Two sample anatomy contour sets were created by two independent radiation therapists who outlined visible bone anatomy on the same seven digitally reconstructed radiographs (DRR) and hard copy outlines were obtained. Three independent observers with differing levels of experience, assessed the discrepancies between the original anatomy contours and the sample sets on two occasions one week apart, by measuring the distances between the original and sample set contours (absolute values in mm). The degree of agreement between the same assessor on two occasions (intra-rater reliability) and between assessors (inter-rater reliability) was analysed using parametric analysis for levels of relationship and significant differences. This simple method of reference anatomy outline measurement was shown to be highly reliable within assessors and between assessors (r > 0.87 and rz > 0.75 for both intra- and inter-rater comparisons). This measurement process may be a suitable method, for undertaking quality assurance activities in image verification within radiation therapy departments. Copyright (2004) Australian Institute of Radiography

  12. HMI Department of Nuclear Chemistry and Reactor. Scientific report 1982

    International Nuclear Information System (INIS)

    1983-01-01

    This report depicts in brief the essential issues of R and D work carried out within the various departments of the Institute in 1982. Such are: in the field of 'neutron scatter': observation of critical phenomena with incoherent neutron scatter; in the field of 'radiation damage to solids': irradiation-induced diffusion, nucleation and dissociation in metals and alloys; in the field of 'reactor chemistry': radiation effects in selected crystalline phases of solidificated high-activity wastes; in the field of 'trace elements in bio-medicine': investigation of the biological function of selenium with respect to reproduction as values work on paraplacental exchange of Cd and Pb during pregnancy; in the field of 'geochemistry': investigation of aqueous geochemical systems under hydrothermal pressure and temperature conditions; in the field of 'reactor operation': periods of shutdown owing to faulty operation, expansion planning, utilization for irradiation experiments. The report also includes comprehensive lists of publications and lectures. (RB) [de

  13. SU-F-T-247: Collision Risks in a Modern Radiation Oncology Department: An Efficient Approach to Failure Modes and Effects Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Schubert, L; Westerly, D; Vinogradskiy, Y; Fisher, C; Liu, A [University of Colorado Denver, Aurora, CO (United States); Aldridge, J [University of Colorado Hospital, Aurora, CO (United States)

    2016-06-15

    Purpose: Collisions between treatment equipment and patients are potentially catastrophic. Modern technology now commonly involves automated remote motion during imaging and treatment, yet a systematic assessment to identify and mitigate collision risks has yet to be performed. Failure modes and effects analysis (FMEA) is a method of risk assessment that has been increasingly used in healthcare, yet can be resource intensive. This work presents an efficient approach to FMEA to identify collision risks and implement practical interventions within a modern radiation therapy department. Methods: Potential collisions (e.g. failure modes) were assessed for all treatment and simulation rooms by teams consisting of physicists, therapists, and radiation oncologists. Failure modes were grouped into classes according to similar characteristics. A single group meeting was held to identify implementable interventions for the highest priority classes of failure modes. Results: A total of 60 unique failure modes were identified by 6 different teams of physicists, therapists, and radiation oncologists. Failure modes were grouped into four main classes: specific patient setups, automated equipment motion, manual equipment motion, and actions in QA or service mode. Two of these classes, unusual patient setups and automated machine motion, were identified as being high priority in terms severity of consequence and addressability by interventions. The two highest risk classes consisted of 33 failure modes (55% of the total). In a single one hour group meeting, 6 interventions were identified. Those interventions addressed 100% of the high risk classes of failure modes (55% of all failure modes identified). Conclusion: A class-based approach to FMEA was developed to efficiently identify collision risks and implement interventions in a modern radiation oncology department. Failure modes and interventions will be listed, and a comparison of this approach against traditional FMEA methods

  14. SU-F-T-247: Collision Risks in a Modern Radiation Oncology Department: An Efficient Approach to Failure Modes and Effects Analysis

    International Nuclear Information System (INIS)

    Schubert, L; Westerly, D; Vinogradskiy, Y; Fisher, C; Liu, A; Aldridge, J

    2016-01-01

    Purpose: Collisions between treatment equipment and patients are potentially catastrophic. Modern technology now commonly involves automated remote motion during imaging and treatment, yet a systematic assessment to identify and mitigate collision risks has yet to be performed. Failure modes and effects analysis (FMEA) is a method of risk assessment that has been increasingly used in healthcare, yet can be resource intensive. This work presents an efficient approach to FMEA to identify collision risks and implement practical interventions within a modern radiation therapy department. Methods: Potential collisions (e.g. failure modes) were assessed for all treatment and simulation rooms by teams consisting of physicists, therapists, and radiation oncologists. Failure modes were grouped into classes according to similar characteristics. A single group meeting was held to identify implementable interventions for the highest priority classes of failure modes. Results: A total of 60 unique failure modes were identified by 6 different teams of physicists, therapists, and radiation oncologists. Failure modes were grouped into four main classes: specific patient setups, automated equipment motion, manual equipment motion, and actions in QA or service mode. Two of these classes, unusual patient setups and automated machine motion, were identified as being high priority in terms severity of consequence and addressability by interventions. The two highest risk classes consisted of 33 failure modes (55% of the total). In a single one hour group meeting, 6 interventions were identified. Those interventions addressed 100% of the high risk classes of failure modes (55% of all failure modes identified). Conclusion: A class-based approach to FMEA was developed to efficiently identify collision risks and implement interventions in a modern radiation oncology department. Failure modes and interventions will be listed, and a comparison of this approach against traditional FMEA methods

  15. Department of Training and Consulting - Overview

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    2010-01-01

    Full text: The Department of Training and Consulting concentrates on the dissemination of knowledge on radiation phenomena: the origins, applications and health effects of ionizing radiation in particular. Its activity is open to the public. However, the main recipients are students of secondary schools and teachers. During about 12 years of such activity the number of visitors has exceeded 60 000 persons, while during last few years the average number of our visitors varies between 6 000 and 7 000 per year, which shows how much this kind of activity is needed. It should be noted that the term 'visitor' is not the most appropriate, because what the 'visitor' actually experiences in the Department is a series of lectures with demonstrations, visits to the MARIA reactor or regular experimenting in a specially designed Laboratory of Atomic and Nuclear Physics for schools, teachers and university students. The Department organized two permanent exhibitions. One is connected with the nuclear waste treatment and storage, another one displays a large model. 4x4x4 m. of a nuclear reactor of the WWER-type which was about to be installed at Zarnowiec about 20 years ago. The Department is equally active during annual Picnics and Festivals of Science in Warsaw and other Polish towns. Our staff is often asked to deliver lectures outside the Institute for Nuclear Studies, and participates in discussions on problems of teaching, in addition, the Department leads, together with the Institute of Physics of the Polish Academy of Sciences, Warsaw, the annual competition, named '' Physical Paths '', for high-school students. The competition is arranged in three categories: research, demonstration of physical phenomena, and essays on physics and its relation to civilization. This competition particularly stimulates small educational centers in Poland. This year, 2010, the competition was organized for the fifth time. The Department of Training and Consulting arranges regular courses

  16. Investigation on regulatory requirements for radiation safety management

    International Nuclear Information System (INIS)

    Han, Eun Ok; Choi, Yoon Seok; Cho, Dae Hyung

    2013-01-01

    NRC recognizes that efficient management of radiation safety plan is an important factor to achieve radiation safety service. In case of Korea, the contents to perform the actual radiation safety management are legally contained in radiation safety management reports based on the Nuclear Safety Act. It is to prioritize the importance of safety regulations in each sector in accordance with the current situation of radiation and radioactive isotopes-used industry and to provide a basis for deriving safety requirements and safety regulations system maintenance by the priority of radiation safety management regulations. It would be helpful to achieve regulations to conform to reality based on international standards if consistent safety requirements is developed for domestic users, national standards and international standards on the basis of the results of questions answered by radiation safety managers, who lead on-site radiation safety management, about the priority of important factors in radioactive sources use, sales, production, moving user companies, to check whether derived configuration requirements for radiation safety management are suitable for domestic status

  17. An investigation of the alternating fractionation formula of the Cumulative Radiation Effect

    International Nuclear Information System (INIS)

    Hamlet, R.; Kirk, J.; Perry, A.M.

    1980-01-01

    The alternating fractionation formula of the Cumulative Radiation Effect (CRE) system was investigated using the mouse intestinal crypt system as a method of assessment of the amount of radiation damage in a normal tissue. The experimental results revealed that the formula is correct in predicting an increased effect with alternating large and small sized fractions, when compared with a standard schedule where the fraction size was kept constant but achieved the same total dose. However, the results also demonstrated that the order in which the alternate fractions were administered affected the amount of radiation damage produced in the tissue. This observation is in contradiction to another prediction of the formula, that the order in which equal numbers of fractions of different magnitudes are administered, will have no effect on the biological end point. The formula, therefore, is only an approximate model of radiation damage in normal tissue and much more information is required before it can be improved upon. (author)

  18. Experimental investigations of synchrotron radiation at the onset of the quantum regime

    DEFF Research Database (Denmark)

    Andersen, Kristoffer; Knudsen, Helge; Uggerhøj, Ulrik Ingerslev

    2012-01-01

    The classical description of synchrotron radiation fails at large Lorentz factors, $\\gamma$, for relativistic electrons crossing strong transverse magnetic fields $B$. In the rest frame of the electron this field is comparable to the so-called critical field $B_0 = 4.414\\cdot10^9$ T. For $\\chi = ......-field quantum electrodynamics, the experimental results are also relevant for the design of future linear colliders where beamstrahlung - a closely related process - may limit the achievable luminosity....... = \\gamma B/B_0 \\simeq 1$ quantum corrections are essential for the description of synchrotron radiation to conserve energy. With electrons of energies 10-150 GeV penetrating a germanium single crystal along the $\\langle110\\rangle$ axis, we have experimentally investigated the transition from the regime...... where classical synchrotron radiation is an adequate description, to the regime where the emission drastically changes character; not only in magnitude, but also in spectral shape. The spectrum can only be described by quantum synchrotron radiation formulas. Apart from being a test of strong...

  19. Experimental investigations of synchrotron radiation at the onset of the quantum regime

    DEFF Research Database (Denmark)

    Andersen, Kristoffer; Uggerhøj, Ulrik Ingerslev

    The classical description of synchrotron radiation fails at large Lorentz factors for relativistic electrons crossing strong transverse magnetic fields. In the rest frame of the electron this field is comparable to the so-called critical field of 4.414*109 T. When the Lorentz factor times the mag......-field quantum electrodynamics, the experimental results are also relevant for the design of future linear colliders where beamstrahlung - a closely related process - may limit the achievable luminosity....... the magnetic field is comparable to the critical field, quantum corrections are essential for the description of synchrotron radiation to conserve energy. With electrons of energies 10-150 GeV penetrating a germanium single crystal along the axis, we have experimentally investigated the transition from...... the regime where classical synchrotron radiation is an adequate description, to the regime where the emission drastically changes character; not only in magnitude, but also in spectral shape. The spectrum can only be described by quantum synchrotron radiation formulas. Apart from being a test of strong...

  20. Annual report 1995 of the Central Safety Department, Research Center Karlsruhe

    International Nuclear Information System (INIS)

    Koelzer, W.

    1996-04-01

    The Central Safety Department is responsible for supervising, monitoring and, to some extent, also executing measures of radiation protection, industrial health and safety as well as physical protection and security at and for the institutes and departments of the Karlsruhe Research Center (Forschungszentrum Karlsruhe GmbH), and for monitoring liquid effluents and the environment of all facilities and nuclear installations on the premises of the Research Center. In addition, research and development work is carried out in the fields of behavior of tritium in the air/soil/plant system, tritium balances for nuclear fusion fuel cycles, and assessments of mining and ore dressing spoils. This report gives details of the different duties and reports the results of 1995 routine tasks, investigations and developments of the working groups of the Department. The reader is referred to the English translation of Chapter 1 describing the duties and organization of the Central Safety Department. (orig.) [de

  1. Investigation on the special Smith-Purcell radiation from a nano-scale rectangular metallic grating

    International Nuclear Information System (INIS)

    Li, Weiwei; Liu, Weihao; Jia, Qika

    2016-01-01

    The special Smith-Purcell radiation (S-SPR), which is from the radiating eigen modes of a grating, has remarkable higher intensity than the ordinary Smith-Purcell radiation. Yet in previous studies, the gratings were treated as perfect conductor without considering the surface plasmon polaritons (SPPs) which are of significance for the nano-scale gratings especially in the optical region. In present paper, the rigorous theoretical investigations on the S-SPR from a nano-grating with SPPs taken into consideration are carried out. The dispersion relations and radiation characteristics are obtained, and the results are verified by simulations. According to the analyses, the tunable light radiation can be achieved by the S-SPR from a nano-grating, which offers a new prospect for developing the nano-scale light sources.

  2. FEATURES OF SCIENTIFIC INVESTIGATIONS CONDUCTED IN THE LABORATORIES OF THE DEPARTMENT OF WATER SUPPLY OF MGSU

    OpenAIRE

    Nikitina Irina Nikolaevna; Eremeev Aleksandr Vladimirovich

    2016-01-01

    The article focuses on the work of the laboratories of the Department of Water Supply of MGSU. The laboratory of pipe-lines, pumping equipment and sanitary equipment operates in MGSU affiliated to the department of water supply. A hydraulic stand for testing and defining the the hydraulic characteristics of pressure and free-flow pipelines of water supply and sewerage systems is installed there. There are also stands for investigating the sanitary equipment of the buildings, the fire and hot ...

  3. Study of dose levels absorbed by members of the public in the nuclear medicine departments

    International Nuclear Information System (INIS)

    Cabral, Geovanna Oliveira de Mello

    2001-03-01

    In nuclear Medicine, radioisotopes are bound to various compounds (called radiopharmaceuticals) for use in various diagnostic and therapeutic applications. These unsealed sources are administered in various forms to patients, who remain radioactive for hours or days, and represent a source of potential radiation exposure for others. Thus, in nuclear medicine departments, radiation protection of workers and members of the public, especially persons accompanying patients, must consider, this exposure. In Brazil, the Comissao Nacional de Energia Nuclear (CNEN) establishes that, in nuclear medicine departments, the patients and persons accompanying should be separated each other. However, this rule is not always followed due to many factors such as physical and emotional conditions of patients. In this context, the aim of this study was the investigation of dose levels, which the persons accompanying patients are exposed to. For monitoring, thermoluminescent dosimeters were employed. The dosimeters were given to 380 persons who were accompanying patients in nuclear medicine departments. Exposure results were lower than 1 mSv. On the basis of CNEN rules, issues regarding stay conditions for members of the public in these departments are discussed. (author)

  4. Department of Energy depleted uranium recycle

    International Nuclear Information System (INIS)

    Kosinski, F.E.; Butturini, W.G.; Kurtz, J.J.

    1994-01-01

    With its strategic supply of depleted uranium, the Department of Energy is studying reuse of the material in nuclear radiation shields, military hardware, and commercial applications. the study is expected to warrant a more detailed uranium recycle plan which would include consideration of a demonstration program and a program implementation decision. Such a program, if implemented, would become the largest nuclear material recycle program in the history of the Department of Energy. The bulk of the current inventory of depleted uranium is stored in 14-ton cylinders in the form of solid uranium hexafluoride (UF 6 ). The radioactive 235 U content has been reduced to a concentration of 0.2% to 0.4%. Present estimates indicate there are about 55,000 UF 6 -filled cylinders in inventory and planned operations will provide another 2,500 cylinders of depleted uranium each year. The United States government, under the auspices of the Department of Energy, considers the depleted uranium a highly-refined strategic resource of significant value. A possible utilization of a large portion of the depleted uranium inventory is as radiation shielding for spent reactor fuels and high-level radioactive waste. To this end, the Department of Energy study to-date has included a preliminary technical review to ascertain DOE chemical forms useful for commercial products. The presentation summarized the information including preliminary cost estimates. The status of commercial uranium processing is discussed. With a shrinking market, the number of chemical conversion and fabrication plants is reduced; however, the commercial capability does exist for chemical conversion of the UF 6 to the metal form and for the fabrication of uranium radiation shields and other uranium products. Department of Energy facilities no longer possess a capability for depleted uranium chemical conversion

  5. Investigations on commercial semiconductor diodes as possible high dose rate radiation detectors

    International Nuclear Information System (INIS)

    Breitenhuber, L.; Kindl, P.; Obenaus, B.

    1992-12-01

    Investigations concerning the relevant properties of commercial semiconductor diodes such as their sensitivity and its dependence on accumulated dose, dose rate, energy, temperature and direction have been made in order to obtain their usefullness as radiation detectors. (authors)

  6. Evaluation of radiation doses received by the staff in nuclear medicine department of Rick

    International Nuclear Information System (INIS)

    Ali, Naemat Abdalla Mohamed

    2001-01-01

    Environmental monitoring in nuclear medicine rooms at Radiation and Isotopes Center Khartoum RICK were carried out using survey meter and thermoluminescent dosimetry. Staff bodies and hands doses measurements are being conducted using thermoluminescent dosimetry. The purpose of the study is to evaluate the radiation received by the staff work in the nuclear medicine department at RICK. Survey meter (RDS-120) and TLD clips of LiF. (Mg.Ti) were used to measure the environment leading of the staff. The associated annual doses have been determined to the staff bodies and hands. It was found that the dose-equivalent rates from bodies and hands of the staff obtained through this work using TLD clips are: nuclear medicine technologist body reading 6.75 mSv per year, physicist body reading 7.89 mSv per year, chemist body reading 6.1 mSv per year, and nurse body reading 8.1 mSv per year. On the other hand the nuclear medicine technologist hands reading 24.19 mSv per year, physicist hands reading 19.15 mSv per year, chemist hands reading 14.616 mSv per year, and nurse hands reading 277.96 mSv per year. All the staff reading in this study agree with the national regulations and international recommendations. It is clear that the dose of nurse hands is the highest one, this is because when they inject the patient with the Tc-99 m they use to spend relatively long time. (Author)

  7. Nuclear Safety Research Department annual report 2000

    International Nuclear Information System (INIS)

    Majborn, B.; Damkjaer, A.; Nielsen, S.P.; Nonboel, E.

    2001-08-01

    The report presents a summary of the work of the Nuclear Safety Research Department in 2000. The department's research and development activities were organized in two research programmes: 'Radiation Protection and Reactor Safety' and 'Radioecology and Tracer Studies'. In addition the department was responsible for the tasks 'Applied Health Physics and Emergency Preparedness', 'Dosimetry', 'Environmental Monitoring', and Irradiation and Isotope Services'. Lists of publications, committee memberships and staff members are included. (au)

  8. Individual radiation response of parotid glands investigated by dynamic 11C-methionine PET

    International Nuclear Information System (INIS)

    Buus, Simon; Grau, Cai; Munk, Ole Lajord; Rodell, Anders; Jensen, Kenneth; Mouridsen, Kim; Keiding, Susanne

    2006-01-01

    Background and Purpose: Previously, we showed that the net metabolic clearance of 11 C-methionine of the parotid gland, K, calculated from dynamic 11 C-methionine PET, can be used as a measure of parotid gland function. The aim of this study was to investigate by dynamic 11 C-methionine PET the individual radiation dose response relationship of parotid glands in head and neck cancer patients. Patients and methods: Twelve head and neck cancer patients were examined by dynamic 11 C-methionine PET after radiotherapy. Parametric images of K were generated, co-registered and compared voxel-by-voxel with the 3D radiation dose plan within the parotid gland to assess the individual radiation dose-function relationship. Results: In each patient, voxel-values of K decreased with increasing radiation dose. Population based analysis showed a sigmoid dose response relationship of parotid gland, from which we estimated a threshold radiation dose of 16 Gy and a mean TD 5 of 30 Gy. TD 5 ranged from 7 to 50 Gy in the group of patients. Conclusions: Individual radiation dose response of parotid glands can be measured by dynamic 11 C-methionine PET. The dose response analysis revealed a sigmoid relationship, a threshold radiation dose of 16 Gy, and a mean TD 5 of 30 Gy

  9. Investigation of resonant polarization radiation of relativistic electrons in gratings at small angles

    International Nuclear Information System (INIS)

    Aleinik, A.N.; Chefonov, O.V.; Kalinin, B.N.; Naumenko, G.A.; Potylitsyn, A.P.; Saruev, G.A.; Sharafutdinov, A.F.

    2003-01-01

    The resonant optical polarization radiation (ROPR) in the Smith-Purcell geometry and the one from the inclined grating at the Tomsk synchrotron and 6-MeV microtron have been investigated. The polarization radiation was observed at 4.2 deg. from the 200 MeV electron beam and at 5 deg. from the 6.2 MeV electron beam. Two methods of measurement of ROPR maxima in these two cases have been used. In the first case (the experiment on synchrotron) we have fixed the wavelength of radiation using an optical filter; the orientation dependence of this radiation was measured. In this dependence we have observed two peaks of radiation from electrons in gold foil grating of 0.1 mm period. The first large peak is a zeroth order peak in direction of specular reflection, and the second one is the first-order peak of resonant polarization radiation. In the experiment on microtron the spectra of ROPR from aluminum foil strip grating of 0.2 mm period in the Smith-Purcell geometry were measured, and the peak of the first-order Smith-Purcell radiation in these spectra was observed. The comparison of data obtained with the simulation results has been performed

  10. Investigation of ionizing radiation shielding effectiveness of decorative building materials used in Bangladeshi dwellings

    Science.gov (United States)

    Yesmin, Sabina; Sonker Barua, Bijoy; Uddin Khandaker, Mayeen; Tareque Chowdhury, Mohammed; Kamal, Masud; Rashid, M. A.; Miah, M. M. H.; Bradley, D. A.

    2017-11-01

    Following the rapid growing per capita income, a major portion of Bangladeshi dwellers is upgrading their non-brick houses by rod-cement-concrete materials and simultaneously curious to decorate the houses using luxurious marble stones. Present study was undertaken to investigate the gamma-ray attenuation co-efficient of decorative marble materials leading to their suitability as shielding of ionizing radiation. A number of commercial grades decorative marble stones were collected from home and abroad following their large-scale uses. A well-shielded HPGe γ-ray spectrometer combined with associated electronics was used to evaluate the mass attenuation coefficients of the studied materials for high energy photons. Some allied parameters such as half-value layer and radiation protection efficacy of the investigated marbles were calculated. The results showed that among the studied samples, the marble 'Carrara' imported from Italy is suitable to be used as radiation shielding material.

  11. Planning of radiation therapy department: criteria and considerations

    International Nuclear Information System (INIS)

    Aggarwal, Lalit M.; Singh, Subhash; Gupta, B.D.

    2001-01-01

    Incidence of cancer is on increasing side and the facilities available to combat and treat this dreaded disease are inadequate in India. With awareness among the people about health becoming more and more with the advancement and availability of diagnostic facilities, detection of cancer is increasing. Now it has become almost mandatory to have treatment facilities for cancer at every district or at least in every medical college of India along with proper diagnostic facilities in addition to private hospitals. Facilities of surgery, chemotherapy, radiotherapy are the bare minimum requirements for the treatment of cancer. Out of above three, setting up of radiotherapy facility is the costliest and requires proper approval from regulatory authorities of the country for radiation safety. Planning of radiation therapy involves site selection, designing an appropriate layout and selection of proper equipment for planning and treatment. Some of the problems faced in starting from zero level are discussed and highlighted

  12. Some considerations on radiation protection. A questionnaire report from the nursing department

    International Nuclear Information System (INIS)

    Hirata, Toshiyuki; Koyama, Masanori; Saito, Masato; Ikai, Takeshi; Nakajima, Fujio; Matsui, Masayuki; Kadono, Koji; Miura, Teruo; Igimi, Yutaka

    1998-01-01

    Authors conducted the questionnairing on the radiation protection in cooperation with nurses. And on the basis of the results, we reported here what is now important for the radiation protection and what we can do as the team medical activities, including the discussion with other documents. On November 1996, the questionnairing was conducted in 165 nurses of Saiseikai Shiga Hospital and replies were received from 78% of them. Nurses from 1 year to <3 years in experience were 44% and these from 3 to <5 years in experience 19%. The questionaire was designed to elicit the interest, the sense and the understanding on the medical radiation protection, and to obtain what kinds of the interest they have and what they want to know. On the understanding of the radiation, many nurses had much interest in the radiation exposure to patients and nurses own, which occupied 33% of the respondents. One hundred thirteen nurses (68%) had some questions on the radiation protection, in which the most was on the potable radiation apparatus. Among patients' questions about the radiation, the most numerous was on the physical and genetic effects and many nurses could not respond the suitably. On the basis of these results nurses were given the training. (K.H.)

  13. Theoretical and practical investigation of the electromagnetic radiation fields from the Sabborah radio broadcasting station

    International Nuclear Information System (INIS)

    Kharita, M. H.; Abo Kasem, I.; Kattab, A.

    2008-01-01

    This work has special importance as it aims at the investigation of the electromagnetic radiation from the Sabborah radio broadcasting station. The report includes general introduction to the physics of the electromagnetic fields and the biological effects of these fields and consequently its health effects. The bases of the recommended exposure limits according to the International Commission on Non-Ionizing Radiation Protection (ICNIRP) have been discussed in addition to the theoretical and practical investigations. This report summarizes the results of this study and the final recommendations. (author)

  14. Federal radiation initiatives wane in Reagan administration

    International Nuclear Information System (INIS)

    Linton, O.W.

    1981-01-01

    A series of administrative initiatives undertaken by the Carter Administration in response to public concerns about harmful effects of exposures to ionizing radiation in various settings has been abandoned by the Reagan Administration. The decision to discard the Radiation Policy Council, the coordinating agency established in 1980, leaves the federal government with no overall focus or overall budget for radiation research and protection activities. The line agencies with direct radiation responsibilities, including the Department of Energy, Nuclear Regulatory Commission, Department of Defense, Food and Drug Administration's Bureau of Radiological health, and Department of Labor, continue with somewhat contradictory and uncoordinated programs

  15. Investigation of ionizing radiation shielding effectiveness of decorative building materials used in Bangladeshi dwellings

    International Nuclear Information System (INIS)

    Yesmin, Sabina; Sonker Barua, Bijoy; Uddin Khandaker, Mayeen; Tareque Chowdhury, Mohammed; Kamal, Masud; Rashid, M.A.; Miah, M.M.H.; Bradley, D.A.

    2017-01-01

    Following the rapid growing per capita income, a major portion of Bangladeshi dwellers is upgrading their non-brick houses by rod-cement-concrete materials and simultaneously curious to decorate the houses using luxurious marble stones. Present study was undertaken to investigate the gamma-ray attenuation co-efficient of decorative marble materials leading to their suitability as shielding of ionizing radiation. A number of commercial grades decorative marble stones were collected from home and abroad following their large-scale uses. A well-shielded HPGe γ-ray spectrometer combined with associated electronics was used to evaluate the mass attenuation coefficients of the studied materials for high energy photons. Some allied parameters such as half-value layer and radiation protection efficacy of the investigated marbles were calculated. The results showed that among the studied samples, the marble ‘Carrara’ imported from Italy is suitable to be used as radiation shielding material. - Highlights: • Studies of decorative building materials for shielding of ionizing radiation. • High energy photon beam were used to obtain various interaction properties. • Marble stone ‘Carrara’ from Italy shows suitability to be used as shielding material.

  16. Report of research and investigation committee for infrared radiation heating technology. Sekigai hosha kanetsu gijutsu kenkyu chosa iinkai hokoku

    Energy Technology Data Exchange (ETDEWEB)

    Matsui, M. (Fukuyama Univ., Hiroshima (Japan). Faculty of Engineering)

    1994-07-01

    The committee was established in July 1990 for research and investigation of infrared (IR) heating technology and finished its activity in March 1993. This report describes the committee members and the results of research and investigation. (1) Application of IR radiation (sensing): the research and investigation results were reported on the following items; the recognition of letters and patterns on cultural properties by IR radiation, the passive sensor (detecting the IR radiated from the object without emitting from the sensor), the IR image system, and the diagnosis of outer wail of buildings. (2) The following were researched on the IR radiation source and IR emitting material; multi-functional heating element having far infrared radiation function and deodorant function, the emissivity of far IR radiation, and the evaluation of the functions by the difference in emissivity. (3) The IR heating technology was described on the following: drying the persimmon using far IR radiation, the present situation of research on IR heating done by foreign power supply companies, and the feature and the application of far IR heater. In addition to these, the following were also reported; (4) measurement of IR radiation and (5) effect of living body and organism.

  17. Starting material radiation source for Moessbauer investigations of tellurium compounds

    International Nuclear Information System (INIS)

    Alexandrov, A.J.; Grushko, J.S.; Makarov, E.F.; Mishin, K.Y.; Baltrunas, D.A.J.

    1977-01-01

    A method is described of preparing a radiation source for Mossbauer investigations of tellurium compounds manufactured on the basis of 5 MgO . Te 124 O 3 . 5 MgO . Te 124 O 3 is irradiated in a reactor by means of thermal neutrons, followed by annealing at a temperature ranging from 600 0 to 1,100 0 C for a period of from 5 to 10 hours

  18. The laboratory testing system for radiation rsistance investigations of integrated circuits

    International Nuclear Information System (INIS)

    Wronski, W.; Wislowski, J.

    1986-01-01

    In order to evaluate the radiation tolerance of integrated circuits MCY 7102 type /MOS RAM/ two devices were built: isotope arrangement for irradiation, and portable tester registering every error of storage block which consists of 32 IC's. Principle of operation and construction of this devices is described. Exemplary results of investigations are shown. (author)

  19. An assessment of nursing staffs' knowledge of radiation protection and practice.

    Science.gov (United States)

    Badawy, Mohamed Khaldoun; Mong, Kam Shan; Paul Lykhun, U; Deb, Pradip

    2016-03-01

    Although the exposure to nursing staff is generally lower than the allowable radiation worker dose limits, awareness and overcoming fears of radiation exposure is essential in order to perform routine activities in certain departments. Furthermore, the nursing staff, whether they are defined as radiation workers or not, must be able to respond to any radiological emergencies and provide care to any patient affected by radiation. This study aims to gauge the awareness of radiation safety among the nursing staff at a major hospital in different departments and recommend if further radiation safety training is required. A prospective multiple choice questionnaire was distributed to 200 nurses in 9 different departments. The questionnaire tested knowledge that would be taught at a basic radiation safety course. 147 nurses (74%) completed the survey with the average score of 40%. Furthermore, 85% of nurses surveyed felt there was a need for radiation safety training in their respective departments to assist with day to day work in the department. An increase in radiation safety materials that are specific to each department is recommended to assist with daily work involving radiation. Moreover, nursing staff that interact with radiation on a regular basis should undertake radiation safety courses before beginning employment and regular refresher courses should be made available thereafter.

  20. An assessment of nursing staffs’ knowledge of radiation protection and practice

    International Nuclear Information System (INIS)

    Badawy, Mohamed Khaldoun; Deb, Pradip; Mong, Kam Shan; Paul Lykhun, U

    2016-01-01

    Although the exposure to nursing staff is generally lower than the allowable radiation worker dose limits, awareness and overcoming fears of radiation exposure is essential in order to perform routine activities in certain departments. Furthermore, the nursing staff, whether they are defined as radiation workers or not, must be able to respond to any radiological emergencies and provide care to any patient affected by radiation. This study aims to gauge the awareness of radiation safety among the nursing staff at a major hospital in different departments and recommend if further radiation safety training is required. A prospective multiple choice questionnaire was distributed to 200 nurses in 9 different departments. The questionnaire tested knowledge that would be taught at a basic radiation safety course. 147 nurses (74%) completed the survey with the average score of 40%. Furthermore, 85% of nurses surveyed felt there was a need for radiation safety training in their respective departments to assist with day to day work in the department. An increase in radiation safety materials that are specific to each department is recommended to assist with daily work involving radiation. Moreover, nursing staff that interact with radiation on a regular basis should undertake radiation safety courses before beginning employment and regular refresher courses should be made available thereafter. (practical matter)

  1. Doses in radiation accidents investigated by chromosome aberration analysis

    International Nuclear Information System (INIS)

    Lloyd, D.C.; Purrott, R.J.; Prosser, J.S.

    1978-01-01

    Results from cytogenetic investigations into 55 cases of suspected over-exposure to radiation during 1977 are reviewed. This report is the seventh in an annual series (previous results were published in NRPB-R5, R10, R23, R35, R41 and R57) which together contain data on 327 studies. Results from all investigations have been pooled for general analysis. Brief accounts are given in an appendix of the circumstances behind the past year's investigations and, where possible, physical estimates of dose have been included for comparison. Two cases are described in more detail: the first concerned a non-classified worker who put an iridium-192 source in his pocket and took it home; and the second involved the accidental contamination of two people with tritium gas. In a second appendix, the confidence limits on cytogenetic dosimetry for X- and γ-ray over-exposures are given and the derivation of these limits is discussed. (author)

  2. Ultrastructural investigations of meiosis as a tool in assessing radiation damage in man

    Energy Technology Data Exchange (ETDEWEB)

    Bojko, M.

    1985-01-01

    Part I is an introduction to the problems of assessing the short-term effects of ionizing radiation on human meiosis. Part II is an investigation of the ultrastructure of human oocytes at pachytene and diplotene stages of meiotic prophase. Processes leading to crossing over and chiasma formation in the female are compared with those in the male and in other organisms. Part III is a study of short-term effects of ..gamma.. radiation on spermatocytes in larvae of the silk moth, Bombyx mori.

  3. Radiation protection medical care of radiation workers

    International Nuclear Information System (INIS)

    Walt, H.

    1988-01-01

    Radiation protection medical care for radiation workers is part of the extensive programme protecting people against dangers emanating from the peaceful application of ionizing radiation. Thus it is a special field of occupational health care and emergency medicine in case of radiation accidents. It has proved helpful in preventing radiation damage as well as in early detection, treatment, after-care, and expert assessment. The medical checks include pre-employment and follow-up examinations, continued long-range medical care as well as specific monitoring of individuals and defined groups of workers. Three levels of action are involved: works medical officers specialized in radiation protection, the Institute of Medicine at the National Board for Atomic Safety and Radiation Protection, and a network of clinical departments specialized in handling cases of acute radiation damage. An account is given of categories, types, and methods of examinations for radiation workers and operators. (author)

  4. An investigation of fission models for high-energy radiation transport calculations

    International Nuclear Information System (INIS)

    Armstrong, T.W.; Cloth, P.; Filges, D.; Neef, R.D.

    1983-07-01

    An investigation of high-energy fission models for use in the HETC code has been made. The validation work has been directed checking the accuracy of the high-energy radiation transport computer code HETC to investigate the appropriate model for routine calculations, particularly for spallation neutron source applications. Model calculations are given in terms of neutron production, fission fragment energy release, and residual nuclei production for high-energy protons incident on thin uranium targets. The effect of the fission models on neutron production from thick uranium targets is also shown. (orig.)

  5. Investigation and computer modeling of radiation and thermal decomposition of polystyrene scintillators

    Science.gov (United States)

    Sakhno, Tamara V.; Pustovit, Sergey V.; Borisenko, Artem Y.; Senchishin, Vitaliy G.; Barashkov, Nikolay N.

    2003-12-01

    This paper is devoted to the investigation and computer modeling of radiation and thermal decomposition of luminescent polystyrene compositions. It has been shown, that the stability of the optical properties of luminescent polymer composition depends on its material structure. On the basis of quantum-chemical calculation has been obtained the possible products of PS gamma-radiolysis and the effect of formation of fragments with conjugated double bonds and products with quinone structure has been investigated.

  6. Investigation on Down's syndrome in the children living in high background radiation area

    International Nuclear Information System (INIS)

    Zha Yongru

    1989-01-01

    After the survey in 1975 and 1979 of Down's syndrome in the children living in high background radiation area, we made a follow-up investigation in 1985 and 1986. All the obtained data are analysed. 25258 children in high background radiation area were examined and 22 children with Down's syndrome were identified, the morbidity rate being 0.87%. 21837 children in control area were examined and four children with Down's syndrome were identified, the morbidity being 0.18%. There was a statistically significant difference between the two groups. It was noted that the occurrence of Down's syndrome was related to the maternal age but there was no evidence suggesting a close relationship between high background radiation and the development of Down's syndrome

  7. Investigation of epitaxial silicon layers as a material for radiation hardened silicon detectors

    International Nuclear Information System (INIS)

    Li, Z.; Eremin, V.; Ilyashenko, I.; Ivanov, A.; Verbitskaya, E.

    1997-12-01

    Epitaxial grown thick layers (≥ 100 micrometers) of high resistivity silicon (Epi-Si) have been investigated as a possible candidate of radiation hardened material for detectors for high-energy physics. As grown Epi-Si layers contain high concentration (up to 2 x 10 12 cm -3 ) of deep levels compared with that in standard high resistivity bulk Si. After irradiation of test diodes by protons (E p = 24 GeV) with a fluence of 1.5 x 10 11 cm -2 , no additional radiation induced deep traps have been detected. A reasonable explanation is that there is a sink of primary radiation induced defects (interstitial and vacancies), possibly by as-grown defects, in epitaxial layers. The ''sinking'' process, however, becomes non-effective at high radiation fluences (10 14 cm -2 ) due to saturation of epitaxial defects by high concentration of radiation induced ones. As a result, at neutron fluence of 1 x 10 14 cm -2 the deep level spectrum corresponds to well-known spectrum of radiation induced defects in high resistivity bulk Si. The net effective concentration in the space charge region equals to 3 x 10 12 cm -3 after 3 months of room temperature storage and reveals similar annealing behavior for epitaxial as compared to bulk silicon

  8. The U.S. department of energy health and mortality study

    International Nuclear Information System (INIS)

    Fry, S.A.; Lushbaugh, C.C.; Shy, C.M.; Cragle, D.L.; Checkoway, H.; Blum, S.; Carpenter, A.V.; Dupree, E.A.; Frome, E.L.; Groer, P.G.; Wilson, J.

    1985-01-01

    Epidemiological studies to evaluate health and mortality among persons employed at some time since 1942 by the U.S. Department of Energy and its predecessors are being carried out by investigators at the Oak Ridge Associated Universities (ORAU) together with others at Hanford and the Los Alamos National Laboratory. The ORAU is responsible for examining relationships between occupational exposure to ionizing radiations from external and/or internal sources and subsequent health and mortality. The health effects of chemical toxicants, especially uranium and other toxic metals are also being investigated. Approximately one third of the estimated total DOE worker population of 600,000 are included in this study. Some results of the study are tabulated. 13 refs

  9. US Department of Energy standardized radiation safety training

    International Nuclear Information System (INIS)

    Trinoskey, P.A.

    1997-02-01

    The following working groups were formed under the direction of a radiological training coordinator: managers, supervisors, DOE auditors, ALARA engineers/schedulers/planners, radiological control personnel, radiation-generating device operators, emergency responders, visitors, Pu facilities, U facilities, tritium facilities, accelerator facilities, biomedical researchers. General courses for these groups are available, now or soon, in the form of handbooks

  10. Ultrastructural investigations of meiosis as a tool in assessing radiation damage in man

    International Nuclear Information System (INIS)

    Bojko, M.

    1985-11-01

    Part I is an introduction to the problems of assesing the short-term effects of ionizing radiation on human meiosis. Part II is an investigation of the ultrastructure of human oocytes at pachytene and diplotene stages of meiotic prophase. Processes leading to crossing over and chiasma formation in the female are compared with those in the male and in other organisms. Part III is a study of short-term effects of γ radiation on spermatocytes in larvae of the silk moth, Bombyx mori. (eg)

  11. Operations report 1985 of the Department of Safety and Radiation Protection

    International Nuclear Information System (INIS)

    Hille, R.; Frenkler, K.L.

    1986-04-01

    Under the heading 'Licensing' the report deals with licensing procedures and the handling of nuclear-fuels and radioactive materials. Operational radiation protection is concerned with operational and personnel monitoring, mathematical methods and safety analyses. Environmental protection deals with emission control, immission monitoring and meteorological measurements, and safety technology with α/β-analysis, dosimetry, equipment servicing and mechanics, nuclear material safeguards. Other subdepartments take care of industrial safety, physical protection, emergency protection and training. Subjects dealt with, too, are dispersion pollutants in atmosphere and environment, further development of radiation protection methods, and the bibliography of radiation protection in KFA. (HK) [de

  12. INVESTIGATION OF SECONDARY MIXED RADIATION FIELD AROUND A MEDICAL LINEAR ACCELERATOR.

    Science.gov (United States)

    Tulik, Piotr; Tulik, Monika; Maciak, Maciej; Golnik, Natalia; Kabat, Damian; Byrski, Tomasz; Lesiak, Jan

    2017-09-29

    The aim of this study is to investigate secondary mixed radiation field around linac, as the first part of an overall assessment of out-of-field contribution of neutron dose for new advanced radiation dose delivery techniques. All measurements were performed around Varian Clinic 2300 C/D accelerator at Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow Branch. Recombination chambers REM-2 and GW2 were used for recombination index of radiation quality Q4 determination (as an estimate of quality factor Q), measurement of total tissue dose Dt and calculation of gamma and neutron components to Dt. Estimation of Dt and Q4 allowed for the ambient dose equivalent H*(10) per monitor unit (MU) calculations. Measurements around linac were performed on the height of the middle of the linac's head (three positions) and on the height of the linac's isocentre (five positions). Estimation of secondary radiation level was carried out for seven different configurations of upper and lower jaws position and multileaf collimator set open or closed in each position. Study includes the use of two photon beam modes: 6 and 18 MV. Spatial distribution of ambient dose equivalent H*(10) per MU on the height of the linac's head and on the standard couch height for patients during the routine treatment, as well as relative contribution of gamma and neutron secondary radiation inside treatment room were evaluated. © The Author 2017. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  13. Experimental investigations of the dosimetric features of x-ray radiation used in x-ray diagnosis

    Energy Technology Data Exchange (ETDEWEB)

    Prostyakova, M A

    1975-10-01

    For radiation hygiene estimates of the extent of the irradiation of various organs and tissues in roentgenological investigations, the quality and quantity of the primary radiation beam and its behaviour in the irradiated medium are assessed. It is shown that the effective energy of x-rays generated at 50-100 kV and with different radiation field dimensions at different depths in a tissue-equivalent irradiated medium is more or less constant, varying within the range 25 to 32 keV. The constancy of effective x-ray energies in a tissue-equivalent medium enables one to use, for different x-ray tube regimes, constant values of the roentgen-rad conversion factor for soft tissue and bone tissue. The investigations confirm the desirability of using high voltages across the x-ray tube in practical x-ray work.

  14. Radiation and waste safety

    International Nuclear Information System (INIS)

    1997-01-01

    Most of the ionizing radiation that people are exposed to in day-to-day activities comes from natural, rather than manmade, sources. Nuclear radiation is a powerful source of benefit to mankind, whether applied in the field of medicine, agriculture, environmental management or elsewhere. The health effects of radiation - both natural and artificial - are relatively well understood and can be minimized through careful safety measures and practices. The Department of Technical Co-operation is sponsoring a programme with the support of the Nuclear Safety Department aiming at establishing Basic Safety Standard requirements in all Member States. (IAEA)

  15. Risks from ionizing radiation during pregnancy

    Directory of Open Access Journals (Sweden)

    mehrdad Gholami

    2007-04-01

    Full Text Available Gholami M1, Abedini MR2, Khossravi HR3, Akbari S4 1. Instructor, Department of medical physics, Faculty of medicine, Lorestan University of medical sciences 2. Assistant professor, Department of radiology, Faculty of medicine, Lorestan University of medical sciences 3. Assistant professor, Department of radiation protection, Iranian Atomic Energy Organization 4. Assistant professor, Department of gynecology, Faculty of medicine, Lorestan University of medical sciences Abstract Background: The discovery of the X-ray in November 1895 by the W. C. Roentgen caused the increasing use of x-ray, because of the benefits that patients get from the resultant the diagnosis. Since medical radiation exposure are mainly in artificial radiation sources, immediately after the x- ray discovery, progressive dermatitis and ophthalmic diseases were occurred in the early physicians and physicists. But delay effects were observed approximately 20 years after the x-ray discovery. History: Based on the studies, ionizing radiation is a potential hazard to the developing fetus, avoiding unnecessary radiation exposure to pregnant women is a standard practice in radiology, unless there are important clinical indications. Due to difference in stages of fetus development, using of the current radiation protection standards includes: justification of a practice, optimization of radiation protection procedures and dose limitation to prevent of serious radiation induced conditions is necessary. Conclusion: Conversely the somatic and genetic effects of x-rays, since the X-ray has the benefit effects, special in diagnostic and treatment procedures, there is increasing use of x-ray, so using of the latest radiation protection procedures is necessary. Radiation protection not only is a scientific subject but also is a philosophy, Moral and reasonable. since the ionizing radiation is a potential hazard to the developing fetus, avoiding unnecessary radiation exposure to the pregnant

  16. Innovation research on the safety supervision system of nuclear and radiation safety in Jiangsu province

    International Nuclear Information System (INIS)

    Zhang Qihong; Lu Jigen; Zhang Ping; Wang Wanping; Dai Xia

    2012-01-01

    As the rapid development of nuclear technology, the safety supervision of nuclear and radiation becomes very important. The safety radiation frame system should be constructed, the safety super- vision ability for nuclear and radiation should be improved. How to implement effectively above mission should be a new subject of Provincial environmental protection department. Through investigating the innovation of nuclear and radiation supervision system, innovation of mechanism, innovation of capacity, innovation of informatization and so on, the provincial nuclear and radiation safety supervision model is proposed, and the safety framework of nuclear and radiation in Jiangsu is elementally established in the paper. (authors)

  17. A survey of techniques to reduce and manage external beam radiation-induced xerostomia in British oncology and radiotherapy departments

    International Nuclear Information System (INIS)

    Macknelly, Andrew; Day, Jane

    2009-01-01

    ? - A feasibility study for locally advanced head and neck cancer patients treated with intensity-modulated radiotherapy. Clinical Oncology 2006;18(6):497-504, Braam P, Terhaard C, Roesnink J, Cornelis P, Raaijmakers C. Intensity-modulated radiotherapy significantly reduces xerostomia compared with conventional radiotherapy. International Journal of Radiation Oncology, Biology and Physics 2006, Wendt TG, Abbasi-Senger N, Salz H, Pinquart I, Koscelny S, Przetak S, et al. 3D-conformal-intensity modulated radiotherapy with compensators for head and neck cancer: clinical results of normal tissue sparing. Radiation Oncology 2006;1:18. Available from: (http://www.ro-journal.com/content/1/1/18) [accessed on 21.11.06].]. This, in turn, offers increased normal tissue sparing than conventional radiotherapy [Ng M, Porceddu S, Milner A, Corry J, Hornby C, Hope G, et al. Parotid-sparing radiotherapy: does it really reduce xerostomia? Clinical Oncology 2005;17(8):610-7.]. The survey indicated that all three techniques, however, are still in use in oncology and radiotherapy departments, and several departments stated that financial considerations were hindering their move toward providing IMRT.

  18. Report of preliminary investigations on the next-generation large-scale synchrotron radiation facility projects

    International Nuclear Information System (INIS)

    1990-01-01

    The Special Committee for Future Project of the Japanese Society for Synchrotron Radiation Research investigated the construction-projects of the large-scaled synchrotron radiation facilities which are presently in progress in Japan. As a result, the following both projects are considered the very valuable research-project which will carry the development of Japan's next-generation synchrotron radiation science: 1. the 8 GeV synchrotron radiation facilities (SPring-8) projected to be constructed by Japan Atomic Energy Research Institute and the Institute of Physical and Chemical Research under the sponsorship of Science Technology Agency at Harima Science Park City, Hyogo Pref., Japan. 2. The project to utilize the Tristan Main Ring (MR) of the National Laboratory for High Energy Physics as the radiation source. Both projects are unique in research theme and technological approach, and complemental each other. Therefore it has been concluded that both projects should be aided and ratified by the Society. (M.T.)

  19. Investigation of variations and trends in solar radiation in Klang Valley Region, Malaysia

    International Nuclear Information System (INIS)

    Mohamed Elnour Yassen, Jamaluddin Mohd Jahi

    2006-01-01

    The objective of this study is to investigate variations and trends in the global solar radiation in Klang Valley region. The least square method was used for the trend analysis. Since the available time series covers 27 years, linear regression was preferred for the trend analysis. The linear trend is used mainly to test the change in solar radiation and to set limits on the rate of change. Trend line and values and significance levels of the slopes have been found. The seasonal and the annual average values were computed from the monthly average radiation data. The seasonal and annual average solar radiation values were designated as dependent variables, and thus, were fitted linearly for season and annual means for each station. The results showed that the mean of maximum incoming global radiation in Sepember with a value of 21.1 MJ m-2 at Petaling Jaya, while the mean minimum in November and December with values of 10.7 and 10.9 MJ m-2 at Petaling Jaya. The low amounts of solar radiation received in November and December are due to greater cloudiness during the period coinciding with the northeast monsoon season. On rainy days, very little global solar radiation received in November and December are due to greater cloudiness during the period coinciding with the northeast monsoon season. On rainy days, very little global solar radiation is received. The distribution of the seasonal mean values of solar radiation exhibits a high symmetry. Inter-monsoon seasons (April-May) and (October-November) show a similar behavior, just like the northeast monsoon season. The overall average rate of change in global solar radiation during 1975-2002 and 1977-2000 is represented by the slope of the linear regression was small (-0.126 and -0.314 MJ m-2 per year for Subang Airport and Petaling Jaya respectively)

  20. Radiation oncology

    International Nuclear Information System (INIS)

    Anon.

    1977-01-01

    The Radiation Oncology Division has had as its main objectives both to operate an academic training program and to carry out research on radiation therapy of cancer. Since fiscal year 1975, following a directive from ERDA, increased effort has been given to research. The research activities have been complemented by the training program, which has been oriented toward producing radiation oncologists, giving physicians short-term experience in radiation oncology, and teaching medical students about clinical cancer and its radiation therapy. The purpose of the research effort is to improve present modalities of radiation therapy of cancer. As in previous years, the Division has operated as the Radiation Oncology Program of the Department of Radiological Sciences of the University of Puerto Rico School of Medicine. It has provided radiation oncology support to patients at the University Hospital and to academic programs of the University of Puerto Rico Medical Sciences Campus. The patients, in turn, have provided the clinical basis for the educational and research projects of the Division. Funding has been primarily from PRNC (approx. 40%) and from National Cancer Institute grants channeled through the School of Medicine (approx. 60%). Special inter-institutional relationships with the San Juan Veterans Administration Hospital and the Metropolitan Hospital in San Juan have permitted inclusion of patients from these institutions in the Division's research projects. Medical physics and radiotherapy consultations have been provided to the Radiotherapy Department of the VA Hospital

  1. Investigation of radiation-chemical behaviour of divalent palladium in perchloric acid solutions

    International Nuclear Information System (INIS)

    Vladimirova, M.V.; Kalinina, S.V.

    1988-01-01

    Gamma-radiolysis of divalent palladium in perchloric acid solutions is studied. Absorption spectra of intermediate palladium compounds formed in the irradiated solution are taken. The analysis of literature data as well as comparative analysis of the absorption spectra obtained under irradiation of palladium (2) perchloric acid solutions with absorption spectra of palladium chlorocomplexes allows to suppose that the mentioned compounds are chlorocomplexes of palladium (2) of different composition depending on HClO 4 concentration in the initial solution and absorbed radiation dose. Radiation-chemical reduction of palladium (2) up to metal is stated to take place in the whole studied range of initial concentrations of components of the system and dose rates. Kinetic dependences of metallic palladium formation are obtained. Values of radiation-chemical yields of metallic palladium formation depending on the initial concentrations of palladium (2) and perchloric acid are given. A mechanism of radiolytic reduction of palladium (2) in the investigated system is suggested based on the experimental data, and a theoretical value of the radiation-chemical yield of palladium (2) reduction being in a good agreement with experimentally found values is calculated

  2. Nuclear Safety Research Department annual report 2000

    Energy Technology Data Exchange (ETDEWEB)

    Majborn, B.; Damkjaer, A.; Nielsen, S.P.; Nonboel, E

    2001-08-01

    The report presents a summary of the work of the Nuclear Safety Research Department in 2000. The department's research and development activities were organized in two research programmes: 'Radiation Protection and Reactor Safety' and 'Radioecology and Tracer Studies'. In addition the department was responsible for the tasks 'Applied Health Physics and Emergency Preparedness', 'Dosimetry', 'Environmental Monitoring', and Irradiation and Isotope Services'. Lists of publications, committee memberships and staff members are included. (au)

  3. Why do patients drop out during radiation therapy?

    International Nuclear Information System (INIS)

    Huh, Seung Jae; Ahn, Yong Chan; Kim, Dae Yong; Shin, Kyung Hwan; Lee, Kyu Chan; Chong, Won A; Kim, Hyun Joo; Wu, Hong Gyun

    1998-01-01

    This study is to see how much proportion of the patients receiving radiation therapy drop out during radiation therapy and to analyze the reason for the incomplete treatment. The base population of this study was 1,100 patients with registration numbers 901 through 2,000 at Department of Radiation Oncology, Samsung Medical Center, Seoul, Korea. Authors investigated the incidence of incomplete radiation therapy, which was defined as less than 95% of initially planned radiation dose, and the reasons for incomplete radiation therapy. One hundred and twenty eight patients (12%) did not complete the planned radiation therapy. The performance status of the incompletely treated patients was generally poorer than that of the base population, and the aim of radiation therapy was more commonly palliative. The most common reason for not completing the planned treatment was the patients' refusal of further radiation therapy because of the distrust of radiation therapy and/or the poor economic status. Careful case selection for radiation therapy with consideration of the socioeconomic status of the patients in addition to the clinical indication would be necessary for the reduction of incomplete treatment, especially in the palliative setting

  4. Code of practice for radiation protection in nuclear medicine

    International Nuclear Information System (INIS)

    Hamed, M. I.

    2010-05-01

    In aim of this study was to develop a draft for a new code practice for radiation protection in nuclear medicine that meets the current relevant international recommendation. The draft includes the following main fields: methods of radiation protection for workers, patients and public. Also, the principles of safe design of nuclear medicine departments, quality assurance program, proper manipulation of radiation sources including radioactive waste and emergency preparedness and response. The practical part of this study includes inspections of three nuclear medicine departments available in Sudan so as to assess the degree of compliance of those departments with what is stated in this code. The inspection missions have been conducted using a checklist that addresses all items that may affect radiation raincoat issues in addition to per formin area radiation monitoring around the installation of the radioactive sources. The results of this revealed that most of the departments do not have effective radiation protection program which in turn could lead to unnecessary exposure to patients, public and workers. Finally, some recommendations are given that - if implemented - could improve the status of radiation protection in nuclear medicine department. (Author)

  5. Organisational culture at the Radiation and Nuclear Safety Authority of Finland's Nuclear Reactor Regulation department

    International Nuclear Information System (INIS)

    Reiman, T.

    2001-01-01

    A case study to investigate the organisational culture of the regulatory authority was conducted at the Radiation and Nuclear Safety Authority of Finland's (STUK) Nuclear Reactor Regulation (YTO) department. Organisational culture is defined as a pattern of shared basic assumptions, which are basically unconscious. Objectives of the study were to conceptualise and describe the main characteristics of YTO's organisational culture and to carry out a tentative core task analysis of the inspectors' work. A combination of quantitative and qualitative methods was used in the research. In the first phase of the research, an organisational culture survey (FOCUS) was administered. It is base on a theory according to which organisations can be categorised into four main culture types, support-, innovation, goal- and rule-culture. It was tailored to better fit this kind of organisation on the basis of document analysis and preliminary interviews. Data was factor analysed and summated scales were formed. YTO's culture was identified as a hierarchy-focused (rule) culture with less emphasis on innovation, support or goals. However, the ideal values of the personnel emphasised also social support and goal setting. Ambiguous goals were felt by some personnel as increased uncertainty about the meaningfulness of one's job. Also a lack of feedback was mentioned as a weakness in YTO's culture. In the second phase of the research, a development workshop was carried out. The themes of the workshop were identified on the basis of the results of the first phase. Main targets for development that were identified in the workshop were human resources, goal setting and knowledge management. The ideal values of the personnel emphasised support and goal cultures. (orig.)

  6. Analysis of university student awareness of radiation exposures from consumer products

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Seung Hwan [Korean Advance Institute of Science and Technology, Daejeon (Korea, Republic of); Cho, Kun Woo [Korea Institute of Nuclear Safety, Daejeon (Korea, Republic of)

    2016-05-15

    Since the terminology 'radioactive consumer product' is not quite familiar to the public and is often considered as negative and detrimental things, the educational curriculum is essential for establishing reliability of nuclear energy related and for the development of better communication strategy of radiation risk with the public. To provide base data which is valuable for establishing efficient curriculum of education and training about radiation safety, it is necessary to apprehend the different level of awareness of radiation exposures classified by various consumer products. On November 2014, a question investigation about asking awareness level of radiation exposure from various consumer products was done for university students who are highly educated. The object students are studied at a four-year-course universities which is located at Daejeon City. Although the average awareness level is comparatively low, the awareness of senior students, who major in radiation, nuclear related departments and male students are relatively high. On the other hand, the awareness of freshman, sophomore, junior students, who do not major in radiation, nuclear related departments and female students are relatively low. It is necessary to provide various information to avoid unnecessary concerns and misconceptions about radiation exposure. This paper will be an instrument for efficient establishment of curriculum of education and training related with radiation safety.

  7. Analysis of university student awareness of radiation exposures from consumer products

    International Nuclear Information System (INIS)

    Kim, Seung Hwan; Cho, Kun Woo

    2016-01-01

    Since the terminology 'radioactive consumer product' is not quite familiar to the public and is often considered as negative and detrimental things, the educational curriculum is essential for establishing reliability of nuclear energy related and for the development of better communication strategy of radiation risk with the public. To provide base data which is valuable for establishing efficient curriculum of education and training about radiation safety, it is necessary to apprehend the different level of awareness of radiation exposures classified by various consumer products. On November 2014, a question investigation about asking awareness level of radiation exposure from various consumer products was done for university students who are highly educated. The object students are studied at a four-year-course universities which is located at Daejeon City. Although the average awareness level is comparatively low, the awareness of senior students, who major in radiation, nuclear related departments and male students are relatively high. On the other hand, the awareness of freshman, sophomore, junior students, who do not major in radiation, nuclear related departments and female students are relatively low. It is necessary to provide various information to avoid unnecessary concerns and misconceptions about radiation exposure. This paper will be an instrument for efficient establishment of curriculum of education and training related with radiation safety

  8. Doses in radiation accidents investigated by chromosome aberration analysis XVI: A review of cases investigated, 1985

    International Nuclear Information System (INIS)

    Lloyd, D.C.; Edwards, A.A.; Prosser, J.S.; Moquet, J.E.; Finnon, P.

    1986-04-01

    During 1985, 28 cases of suspected overexposure to ionising radiation were referred to NRPB for investigation by cytogenetic analysis, and the results are presented in this report. Of the 28 cases, 17 were associated with industrial radiography, 9 from major nuclear organisations and 2 from research, education and health institutions. In 20 cases, no biological indication of overexposure was found. The remaining 8 cases all arose from industrial uses of radiation. The highest overexposure to a sealed source in 1985 ws about 0.4 Gy from an 192 Ir source that became detached from its winding mechanism. Two serious incidents involving unsealed sources are also described; an accidental ingestion of 125 I, for which cytogenetic analysis is of limited relevance, and an inhalation of droplets of tritiated water. The latter also produced a committed dose equivalent of about 0.4 Sv, the estimates from cytogenetic analysis and urine analysis being in good agreement. (author)

  9. Organic Materials Ionizing Radiation Susceptibility for the Outer Planet/Solar Probe Radioisotope Power Source

    Science.gov (United States)

    Golliher, Eric L.; Pepper, Stephen V.

    2001-01-01

    The Department of Energy is considering the current Stirling Technology Corporation 55 We Stirling Technology Demonstration Convertor as a baseline option for an advanced radioisotope power source for the Outer Planets/Solar Probe project of Jet Propulsion Laboratory and other missions. However, since the Technology Demonstration Convertor contains organic materials chosen without any special consideration of flight readiness, and without any consideration of the extremely high radiation environment of Europa, a preliminary investigation was performed to address the radiation susceptibility of the current organic materials used in the Technology Demonstration Convertor. This report documents the results of the investigation. The results of the investigation show that candidate replacement materials have been identified to be acceptable in the harsh Europa radiation environment.

  10. Investigation of the phytohaemagglutinin stimulation of rat lymphocytes after exposure to ionizing radiation

    International Nuclear Information System (INIS)

    Ohletz, H.C.

    1979-01-01

    It is investigated with the help of impulsecytophotometry how whole-body irradiation of rats with 10 rd on 10 successive days and 1 x 100 rd affects the DNA-synthesis of peripheral blood lymphocytes with and without stimulation by phytohaemagglutinin (PHA). Furthermore, a procain-vitamin mixture (gerioptik plus H3) is tested with regard to its radiation protection effect. The test took place 2 hrs, 14 days, and 28 days p.r.. Both after 10 x 10rd, and after 100 rd, 2 hrs after irradiation there was a significant increase in the share of the DNA synthetising lymphocytes which, in its extents, corresponded with the PHA-stimulation of non-irradiated control animals. In the course of 28 days, these values returned to the control value. After 10 x 10 rd the PHA-stimulation was indirectly proportional to the radiation-induced stimulation. The stronger the radiation-induced DNA-synthesis, the lower was the ability to further increase it by means of PHA. After 100 rd, the PHA-effect is significant 2 hrs p.r. : 41% of the cells are in the S- and G2-phase. 14 days p.r. this effect is converted: No detectable PHA-effect as indication of a radiation damage. 28 days p.r. all values are congruent with the controls. In a third test series before irradiation with 100 rd and then daily, 'gerioptil plus H3' was injected s. c. Here, the lymphocytes of the animals thus heated behaved as if no irradiation had taken place i. c., among others, 14 days p.r. there was a significant PHA-effect again. Especially he last observation, that a significantly disturbed blast transformation was renormalized, leads one to assume a radiation protective effect of this procain-vitamin mixture. The results are discussed and compared with other investigations. (orig./MG) [de

  11. Analytical investigation of adaptive control of radiated inlet noise from turbofan engines

    Science.gov (United States)

    Risi, John D.; Burdisso, Ricardo A.

    1994-01-01

    An analytical model has been developed to predict the resulting far field radiation from a turbofan engine inlet. A feedforward control algorithm was simulated to predict the controlled far field radiation from the destructive combination of fan noise and secondary control sources. Numerical results were developed for two system configurations, with the resulting controlled far field radiation patterns showing varying degrees of attenuation and spillover. With one axial station of twelve control sources and error sensors with equal relative angular positions, nearly global attenuation is achieved. Shifting the angular position of one error sensor resulted in an increase of spillover to the extreme sidelines. The complex control inputs for each configuration was investigated to identify the structure of the wave pattern created by the control sources, giving an indication of performance of the system configuration. It is deduced that the locations of the error sensors and the control source configuration are equally critical to the operation of the active noise control system.

  12. Doses in radiation accidents investigated by chromosome aberration analysis

    International Nuclear Information System (INIS)

    Lloyd, D.C.; Purrott, R.J.; Prosser, J.S.; White, A.D.; Hesketh, L.C.; Priseman, S.J.; Lelliot, D.J.; Stimpson, L.W.

    1980-02-01

    The results are reviewed from investigations during 1979 into 82 cases of suspected over-exposure to radiation. Of these 45 were associated with industrial radiography, 11 with one or other of the major nuclear organisations, and 26 with an institution of research, education or health. 83% of the dose estimates were in the range 0.0-0.09 Gy (0-9 rad), and 17% in the range 0.1-0.29 Gy (10-29 rad). These data are compared with data obtained by physical dosimetry, and a brief summary is given of the circumstances of each over-exposure, or suspected over-exposure. (author)

  13. Improvement of radiation protection conditions during radiodiagnostic investigations

    International Nuclear Information System (INIS)

    Ivanov, E.V.; Livshits, R.E.; Lev, M.Ya.; Zakharenko, Yu.S.; Kal'nitskij, S.A.; Nechiporuk, V.I.

    1978-01-01

    Thermoluminescence dosimeters were used to estimate individual doses of radiation received by personnel of radiodiagnostic laboratories. The experiment, which lasted 3 months, showed that although the average levels of radiation did not exceed the permissible values, in some cases the personnel could receive an annual dose close to the maximum permissible one. A number of arrangements to improve radiation safety were proposed

  14. Enhanced radiation response in radioresistant MCF-7 cells by targeting peroxiredoxin II

    Directory of Open Access Journals (Sweden)

    Diaz AJG

    2013-10-01

    Full Text Available Anthony Joseph Gomez Diaz,1 Daniel Tamae,2 Yun Yen,3 JianJian Li,4 Tieli Wang1 1Department of Chemistry and Biochemistry, California State University at Dominguez Hills, Carson, CA, 2Center of Excellence in Environmental Toxicology, Department of Pharmacology, University of Pennsylvania, Philadelphia, PA, 3Department of Clinical and Molecular Pharmacology, Beckman Research Institute of City of Hope National Medical Center, Duarte, CA, 4Department of Radiation Oncology, University of California Davis, Sacramento, CA, USA Abstract: In our previous study, we identified that a protein target, peroxiredoxin II (PrxII, is overexpressed in radioresistant MCF+FIR3 breast-cancer cells and found that its expression and function is associated with breast-cancer radiation sensitivity or resistance. Small interference RNA (siRNA targeting PrxII gene expression was able to sensitize MCF+FIR3 radioresistant breast-cancer cells to ionizing radiation. The major focus of this work was to investigate how the radiation response of MCF+FIR3 radioresistant cells was affected by the siRNA that inhibits PrxII gene expression. Our results, presented here, show that silencing PrxII gene expression increased cellular toxicity by altering cellular thiol status, inhibiting Ca2+ efflux from the cells, and perturbing the intracellular Ca2+ homeostasis. By combining radiotherapy and siRNA technology, we hope to develop new therapeutic strategies that may have potential to enhance the efficacy of chemotherapeutic agents due to this technology's property of targeting to specific cancer-related genes. Keywords: siRNA, PrxII, radiation resistance, Ca2+, MCF+FIR3

  15. Investigation of scientific literacy on understanding of ionizing radiations in elementary and junior high school students in Kagoshima prefecture

    International Nuclear Information System (INIS)

    Fukutoku, Yasuo

    2009-01-01

    Recently in Japan, many investigations to grasp the ways of thinking in the national layers for energy, environment and radiation applications have been carried out. In the investigations for radiation applications, there is a pointing out that the age which the knowledge on radiations and their related matters is formed is predominantly in elementary school years. Therefore, in order to find out the future way of proceeding with the education of nuclear power and radiations in the curriculums of elementary and junior high schools, the questionnaire survey on radiations and their related matters was carried out for the public elementary and junior high school students in Kagoshima prefecture. The results of the questionnaire survey are summarized in the present paper. (K. Kato)

  16. Investigation of the Surface Filamentary Discharge in Focus of Microwave Radiation

    Science.gov (United States)

    2010-08-01

    microwave radiation 5a. CONTRACT NUMBER ISTC Registration No: 3784 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) Dr. Kirill...NUMBER(S) ISTC 07-7011 12. DISTRIBUTION/AVAILABILITY STATEMENT Approved for public release; distribution is unlimited. (approval given by local...contract to the International Science and Technology Center ( ISTC ), Moscow Project ISTC # 3784p (077011) Investigation of the surface filamentary

  17. [In vivo mutagenicity and clastogenicity of ionizing radiation in nuclear medicine

    International Nuclear Information System (INIS)

    1989-01-01

    The overall goals of our research remains to investigate the mutagenic and clastogenic effects of exposure to low levels of ionizing radiation in human lymphocytes. We are studying hospital patients referred to a nuclear medicine department for diagnostic cardiac imaging and nuclear medicine technologists who administer radionuclides

  18. SU-F-I-72: Evaluation of the Ancillary Lead Shielding for Optimizing Radiation Protection in the Interventional Radiology Department

    Energy Technology Data Exchange (ETDEWEB)

    Tonkopi, E; Lightfoot, C [Dalhousie University, Queen Elizabeth II Health Sciences Ctr, Halifax, NS (Canada); LeBlanc, E [Queen Elizabeth II Health Sciences Ctr, Halifax, NS (Canada)

    2016-06-15

    Purpose: The rising complexity of interventional fluoroscopic procedures has resulted in an increase of occupational radiation exposures in the interventional radiology (IR) department. This study assessed the impact of ancillary shielding on optimizing radiation protection for the IR staff. Methods: Scattered radiation measurements were performed in two IR suites equipped with Axiom Artis systems (Siemens Healthcare, Erlangen, Germany) installed in 2006 and 2010. Both rooms had suspended ceiling-mounted lead-acrylic shields of 75×60 cm (Mavig, Munich, Germany) with lead equivalency of 0.5 mm, and under-table drapes of 70×116 cm and 65×70 cm in the newer and the older room respectively. The larger skirt can be wrapped around the table’s corner and in addition the newer suite had two upper shields of 25×55 cm and 25×35 cm. The patient was simulated by 30 cm of acrylic, air kerma rate (AKR) was measured with the 180cc ionization chamber (AccuPro Radcal Corporation, Monrovia, CA, USA) at different positions. The ancillary shields, x-ray tube, image detector, and table height were adjusted by the IR radiologist to simulate various clinical setups. The same exposure parameters were used for all acquisitions. AKR measurements were made at different positions relative to the operator. Results: The AKR measurements demonstrated 91–99% x-ray attenuation by the drapes in both suites. The smaller size of the under-table skirt and absence of the side-drapes in the older room resulted in a 20–50 fold increase of scattered radiation to the operator. The mobile suspended lead-acrylic shield reduced AKR by 90–94% measured at 150–170 cm height. The recommendations were made to replace the smaller under-table skirt and to use the ceiling-mounted shields for all IR procedures. Conclusion: The ancillary shielding may significantly affect radiation exposure to the IR staff. The use of suspended ceiling-mounted shields is especially important for reduction of

  19. Radiation protection problems with dental radiological equipment

    International Nuclear Information System (INIS)

    Cooney, P.; Rajan, J.; Malone, J.F.; Gavin, G.

    1995-01-01

    With the advent of the EC Patient Directive, the importance of surveying and optimising patient exposure for diagnostic imaging procedures is paramount. In the field of dentistry there has been a heightened interest in areas of equipment performance and patient exposure. This interest, coupled with a number of dental radiation safety incidents investigated by our department, and the issuing of a Code of Practice for Radiological Protection in Dentistry by the Department of Health, led to the establishment in our department, of an evaluation protocol for the performance and operation of dental X ray equipment. The protocol was used to perform a survey on over 100 dental X ray units in use in the Public Sector in Ireland. This presentation will report on the radiation incidents mentioned above. It will detail the protocol and furnish the results and conclusions of the survey. The survey has made it possible to establish clearly the necessary steps required to ensure compliance with requirements. In addition, the corrective steps taken by the dental authorities will be presented and the overall impact of the regulations and the programme consequent on them will be reviewed. (Author)

  20. Reduction of doses to staff in a nuclear medicine department

    International Nuclear Information System (INIS)

    Van Every, B.

    1982-01-01

    Data relating to the radiation protection of staff working in the Department of Nuclear Medicine, Alfred Hospital, Victoria during the period 1977 to 1981 are examined. No member of staff received more than one tenth of the annual whole body dose limit of 5x10 4 μSv. The reduction in the total whole body dose of staff and in the technologist's individual dose is due to relocating the department, using appropriate radiation monitoring equipment, using a staff roster and making staff aware of previous doses

  1. Radiation exposure dose on persons engaged in radiation-related industries in Korea

    International Nuclear Information System (INIS)

    Lim, Bong Sik

    2006-01-01

    This study investigated the status of radiation exposure doses since the establishment of the 'Regulations on Safety Management of Diagnostic Radiation Generation Device' in January 6, 1995. The level of radiation exposure in people engaged or having been engaged in radiation-related industries of inspection organizations, educational organization, military units, hospitals, public health centers, businesses, research organizations or clinics over a 5 year period from Jan. 1, 2000 to Dec. 31, 2004 was measured. The 149,205 measurement data of 57,136 workers registered in a measurement organization were analysed in this study. Frequency analysis, a Chi-square test, Chi-square trend test, and ANOVA was used for data analysis. Among 57,136 men were 40,870 (71.5%). 50.3% of them were radiologic technologists, otherwise medical doctors (22.7%), nurse (2.9%) and others (24.1%). The average of depth radiation and surface radiation during the 5-year period were found to decrease each year. Both the depth radiation and surface radiation exposure were significantly higher in males, in older age groups, in radiological technologists of occupation. The departments of nuclear medicine had the highest exposure of both depth and surface radiation of the divisions of labor. There were 1.98 and 2.57 per 1,000 person-year were exposed more than 20 mSv (limit recommended by International Commission on Radiological Protection) in depth and surface radiation consequently. The total exposure per worker was significantly decreased by year. But Careful awareness is needed for the workers who exposed over 20 mSv per year. In order to minimize exposure to radiation, each person engaged in a radiation-related industry must adhere to the individual safety management guidelines more thoroughly. In addition, systematic education and continuous guidance aimed at increasing the awareness of safety must be provided

  2. Measuring thyroid uptake with hand-held radiation monitors

    International Nuclear Information System (INIS)

    Deschamps, M.

    1987-04-01

    With the use of Iodine 123, 125 and 131 and some compounds of Technetium-99 m, a fraction of the isotopes can be trapped in the thyroid of the technicians. We used the hand-held radiation contamination or survey meters of the nine (9) Nuclear medicine departments we visited to see if they were adequate for the evaluation of thyroid uptake of the users. Measurements on a neck-phanton helped us to determine a minimum detectable activity for each isotope. We were then able to check if the measurements of investigations and action levels were possible. None of the hand-held radiation monitors are completely satisfactory for the measure of thyroid uptake of the user. We discuss a class of equipment capable of measuring radiation emissions at the investigation level. Measurement at the action level is possible with meters having scintillation or proportional probes but none of them permits the discrimination in energy required for a quantitative evaluation of the radioisotopes used

  3. Occupational exposure at the Department of Nuclear Medicine as a work environment: A 19-year follow-up

    International Nuclear Information System (INIS)

    Piwowarska-Bilska, H.; Birkenfeld, B.; Gwardys, A.; Listewnik, M. H.; Elbl, B.; Cichon-Bankowska, K.; Supinska, A.

    2011-01-01

    Background: This study assessed the radiation safety at Nuclear Medicine Department being a work environment. Ionizing radiation exposure of the employees in the last 19 years and the effects of legislative changes in radiological protection were analyzed. Material/Methods: All employees of the investigated department were regularly and individually monitored using chest badges equipped with Kodak film type 2. Overall, 629 annual doses of the employees of nuclear medicine department, registered in the period 1991 - 2009, were analyzed statistically. Results: Technicians were found to be the largest exposed professional group, whereas nurses received the highest annual doses. Physicians received an average annual dose at the border detection methods. Ancillary and administration staff occasionally received doses above the method detection limit (MDL). The average annual dose for all dosimetry records was 0.7 mSv, and that for dosimetry records equal and higher than MDL was 2.2 mSv. Conclusions: There was no case of an exceeded dose limit for a worker. Furthermore, improvement of radiological protection had a significant impact on the reduction of doses for the most exposed employees. (authors)

  4. Optimization of radiation protection (OPR) of workers in nuclear medicine department occupationally to ionizing radiation

    International Nuclear Information System (INIS)

    Ugrinska, Ana; Crcareva, Biljana; Andonovski, Boris

    2010-01-01

    Occupational radiation exposure of nuclear medicine personnel arise either from external irradiation during the handling or from the entry of radioactive substances in the body; the major source of external irradiation is the patient that has received a radiopharmaceutical for diagnostic or therapeutic purposes. In this study we present the dosimetry monitoring of the personnel at the Institute of Pathophysiology and Nuclear Medicine in Skopje (IPNM) before and after the implementation the methods of ORP. Twenty-seven employees were optimized with standard TLD card, monthly, expressed as whole body personal dose in the period of use of dosimeter. Annual Effective Doses (AED) are presented for years: 2001, 2004, 2005, 2006, 2007, 2008. In the year 2005, after measurement from Technical Service Organization, IPNM Radiation Protection Officer (RPO) designed and implemented new recommendation and modality such as: designation of areas, introducing ambiental dose measurements, classification of employees, personnel rotation, risk assessment, occupational dose constraints, education of personnel, compliance with written procedures and establishing the Programme for Radiation Protection (RP). ORP measures were applied during the year of 2006, so the results of 2001, 2004 and 2005 correspond to unopimized RP. We were evaluated three groups: radiopharmacy laboratory (RPL), nuclear medicine technologist (NMT) and medical doctors. The third group was further divided according to the AED in group with AED bellow 1.6 mSv (MD1), and group with AED above this level (MD2). The average AED in the NMT group for 2005 was 3.59 mSv, while in 2008 it was 1.8 mSv; for MD1 group in 2005 was 1.5 mSv and in MD2 was 3.0 mSv. The average AED in 2008 for MD1 was 1.1 mSv, while MD2 group comprised of only one subject with annual effective dose of 1.76 mSv. The most exposed groups were nuclear medicine technologists (NMT) and medical doctors routinely involved in everyday nuclear medicine

  5. [Investigation of radiation dose for lower tube voltage CT using automatic exposure control].

    Science.gov (United States)

    Takata, Mitsuo; Matsubara, Kousuke; Koshida, Kichirou; Tarohda, Tohru

    2015-04-01

    The purpose of our study was to investigate radiation dose for lower tube voltage CT using automatic exposure control (AEC). An acrylic body phantom was used, and volume CT dose indices (CTDIvol) for tube voltages of 80, 100, 120, and 135 kV were investigated with combination of AEC. Average absorbed dose in the abdomen for 100 and 120 kV were also measured using thermoluminescence dosimeters. In addition, we examined noise characteristics under the same absorbed doses. As a result, the exposure dose was not decreased even when the tube voltage was lowered, and the organ absorbed dose value became approximately 30% high. And the noise was increased under the radiographic condition to be an equal absorbed dose. Therefore, radiation dose increases when AEC is used for lower tube voltage CT under the same standard deviation (SD) setting with 120 kV, and the optimization of SD setting is crucial.

  6. Investigation of the sensitivity of visible continuum Zeff(0) to edge radiation

    International Nuclear Information System (INIS)

    Telesca, G.; Oost, G. Van; Ongena, J.; Leys, C.; Schoon, N.

    1992-01-01

    The determination of Z eff from visible continuum radiation is based on the assumption that the line-integrated continuum signal is mostly composed of bremsstrahlung radiation. In practice a wavelength window relatively free of spectral lines is selected, and the line-integrated continuum signal along different chords from the edge up to the central plasma is measured. The local emissivity ε(r) is then calculated using an Abel inversion procedure, and the Z eff profile can be obtained. Although theory and techniques are well established, in any experimental device there remains an uncertainty in the calculated value of Z eff due to the non-bremsstrahlung radiation from the cooler edge plasma (e.g. emission from recombination and molecular bands). As a consequence, the local bremsstrahlung emissivity in the outer region of the plasma cannot be determined and the signal measured along every chord through the plasma contains a spurious contribution. In this paper the error in the value of the central plasma emissivity (and Z eff ) due to edge radiation has been investigated. Qualitative analytical considerations have been complemented by a qualitative analysis, consisting of the comparison of test emissivity profiles with Abel-inverted profiles obtained from the integrals along central chords only. (author) 5 refs., 5 figs

  7. Chromosome investigations on persons whose mothers have been treated with ionizing radiations during pregnancy

    International Nuclear Information System (INIS)

    Hanebuth, P.

    1982-01-01

    This thesis reports on chromosome investigations on seven persons between 2 and 26 years of age who, during their prenatal life, have been exposed to ionizing radiation. The metaphase chromosomes from peripheral lymphocytes, obtained by standard cytogenic methods, have been scanned for numerical and structural aberrations after a culture period of two or three days. Comparison with non-irradiated specimens revealed a summarily slight increase in the occurrence of some structural aberrations in the irradiated material. The differences are smaller in number than the rate of deviation to be accounted to culturing techniques so that one cannot deduce a radiation-induced impairment from these results. As one of the persons investigated has been undergoing longterm therapy with anticonvulsive drugs, this case is discussed separately. In another case, new staining methods (G, C, or Q-bands) together with an investigation of material from the father, revealed a particularly small Y-chromosome. (orig./MG) [de

  8. Investigation of solar cell radiation damage

    International Nuclear Information System (INIS)

    Bernard, J.; Reulet, R.; Arndt, R.A.

    1974-01-01

    Development of communications satellites has led to the requirement for a greater and longer lived solar cell power source. Accordingly, studies have been undertaken with the aim of determining which solar cell array provides the greatest power at end of life and the amount of degradation. Investigation of the damage done to thin silicon and thin film CdS solar cells is being carried out in two steps. First, irradiations were performed singly with 0.15, 1.0 and 2.0MeV electrons and 0.7, 2.5 and 22MeV proton. Solar cells and their cover materials were irradiated separately in order to locate the sites of the damage. Diffusion length and I.V. characteristics of the cells and transmission properties of the cover materials were measured. All neasurements were made in vacuum immediately after irradiation. In the second part it is intended to study the effect of various combinations of proton, electron and photon irradiation both with and without an electrical load. The results of this part show whether synergism is involved in solar cell damage and the relative importance of each of three radiation sources if synergism is found [fr

  9. DOE ASR Final Report on “Use of ARM Observations to Investigate the Role of Tropical Radiative Processes and Cloud Radiative Effects in Climate Simulations”

    Energy Technology Data Exchange (ETDEWEB)

    Fu, Qiang [Univ. of Washington, Seattle, WA (United States). Dept. of Atmospheric Sciences; Comstock, Jennifer [Univ. of Washington, Seattle, WA (United States). Dept. of Atmospheric Sciences

    2018-01-29

    The overall objective of this ASR funded project is to investigate the role of cloud radiative effects, especially those associated with tropical thin cirrus clouds in the tropical tropopause layer, by analyzing the ARM observations combined with numerical models. In particular, we have processed and analyzed the observations from the Raman lidar at the ARM SGP and TWP sites. In the tenure of the project (8/15/2013 – 8/14/2016 and with a no-cost extension to 8/14/2017), we have been concentrating on (i) developing an automated feature detection scheme of clouds and aerosols for the ARM Raman lidar; (ii) developing an automated retrieval of cloud and aerosol extinctions for the ARM Raman lidar; (iii) investigating cloud radiative effects based on the observations on the simulated temperatures in the tropical tropopause layer using a radiative-convective model; and (iv) examining the effect of changes of atmospheric composition on the tropical lower-stratospheric temperatures. In addition, we have examined the biases in the CALIPSO-inferred aerosol direct radiative effects using ground-based Raman lidars at the ARM SGP and TWP sites, and estimated the impact of lidar detection sensitivity on assessing global aerosol direct radiative effects. We have also investigated the diurnal cycle of clouds and precipitation at the ARM site using the cloud radar observations along with simulations from the multiscale modeling framework. The main results of our research efforts are reported in the six referred journal publications that acknowledge the DOE Grant DE-SC0010557.

  10. Investigation of salivary function and oral microbiota of radiation caries-free people with nasopharyngeal carcinoma.

    Directory of Open Access Journals (Sweden)

    Jingyang Zhang

    Full Text Available Radiation caries have been reported to be correlated with radiotherapy-induced destruction of salivary function and changes in oral microbiota. There have been no published reports detailing patients who have remained radiation caries-free following radiotherapy for nasopharyngeal carcinoma. The aim of this study was to investigate the relationship between salivary function, oral microbiota and the absence of radiation caries. Twelve radiation caries-free patients and nine patients exhibiting radiation caries following irradiated nasopharyngeal carcinoma were selected. V40, the dose at which the volume of the contralateral parotid gland receives more than 40 Gy, was recorded. Stimulated saliva flow rate, pH values and buffering capacity were examined to assess salivary function. Stimulated saliva was used for molecular profiling by Denaturing Gradient Gel Electrophoresis. Mutans streptococci and Lactobacilli in saliva were also cultivated. There were no significant differences in V40 between radiation caries-free individuals and those with radiation caries. Compared with normal values, the radiation caries-free group had significantly decreased simulated saliva flow rate, while there were no significant differences in the saliva pH value and buffering capacity. Similar results were observed in the radiation caries group. There was no statistical difference in microbial diversity, composition and log CFU counts in cultivation from the radiation caries-free group and the radiation caries group. Eleven genera were detected in these two groups, among which Streptococcus spp. and Neisseria spp. had the highest distribution. Our results suggest that changes in salivary function and in salivary microbiota do not explain the absence of radiation caries in radiation caries-free individuals.

  11. Radiation sickness

    International Nuclear Information System (INIS)

    Endoh, Masaru; Ishida, Yusei; Saeki, Mitsuaki

    1983-01-01

    The frequency of radiation sickness in 1,060 patients treated at our Department was 12.8 percent. It was frequent in patients with brain cancer (12 percent), whole spine cancer (47 percent), uterus cancer (28 percent), lung cancer (22 percent) and esophagus cancer (12 percent). Radiation sickness following X-irradiation was studied in its relation to patient's age, size of radiation fields, dosis and white blood cell count. However, we could not find any definite clinical feature relevant to occurrence. There are many theories published concerning the mechanism of radiation sickness. Clinical experiences have shown that radiation sickness cannot be explained by one theory alone but by several theories such as those based on psychology, stress or histamine. (author)

  12. Cytogenetic investigation of subjects professionally exposed to radiofrequency radiation.

    Science.gov (United States)

    Maes, Annemarie; Van Gorp, Urbain; Verschaeve, Luc

    2006-03-01

    Nowadays, virtually everybody is exposed to radiofrequency radiation (RFR) from mobile phone base station antennas or other sources. At least according to some scientists, this exposure can have detrimental health effects. We investigated cytogenetic effects in peripheral blood lymphocytes from subjects who were professionally exposed to mobile phone electromagnetic fields in an attempt to demonstrate possible RFR-induced genetic effects. These subjects can be considered well suited for this purpose as their RFR exposure is 'normal' though rather high, and definitely higher than that of the 'general population'. The alkaline comet assay, sister chromatid exchange (SCE) and chromosome aberration tests revealed no evidence of RFR-induced genetic effects. Blood cells were also exposed to the well known chemical mutagen mitomycin C in order to investigate possible combined effects of RFR and the chemical. No cooperative action was found between the electromagnetic field exposure and the mutagen using either the comet assay or SCE test.

  13. An Investigation of Psychological Counselling and Guidance Department Students' Perceptions of Inclusive Education Related Competence

    Science.gov (United States)

    Efilti, Erkan; Arslan, Coskun

    2017-01-01

    The purpose of the present research is investigating psychological counseling and guidance department students' perceptions of their inclusive education related competence. The work group of the present research consists of 1st, 2nd, 3rd and 4th year undergraduate students, who studied at Konya Necmettin Erbakan University Ahmet Kelesoglu Faculty…

  14. Investigation of the use of Galena concrete in electromagnetic radiation shielding

    International Nuclear Information System (INIS)

    Egwuonwu, G. N.; Bukar, P. H.; Avaa, A.

    2011-01-01

    Galena samples, collected from Ishiagu, south-eastern Nigeria, were used to make high density concretes for experimental radiation shielding. The concretes were molded into cylindrical tablets of various densities and volumes in order to ascertain their attenuation capability to some electromagnetic radiations. Blue visible light and gamma-ray sourced from cobalt-60, were transmitted through the concretes and detected with the aid of Op-Amp and digital Geiger-Muller Counter respectively. The absorption coefficients of the samples of thicknesses in the range of 1.00 - 5.00 cm were determined. Results show that for a typical galena concrete of average density 2.33gcm -3 , the absorption coefficient is about 1.186 cm -1 for the blue light and 0.495cm -1 for gamma-ray. For this density, 4.45cm of the galena concrete reduces the gamma-ray intensity by 90% and its half value layer thickness is 1.40cm. The investigation however, suggests the shielding properties of the galena sourced from Ishiagu. A database of shielding strength for the in situ galena was established hence, can serve as suitable platform for quality and quantity control in radiation shielding technology in radiotherapy treatment rooms and nuclear reactors.

  15. Investigation of a valuable biochemical indicator as objective measurement in radiation treated cancer patients

    International Nuclear Information System (INIS)

    Horvath, M.; Rode, I.L.

    1978-01-01

    In the investigation of a valuable biochemical indicator in radiotherapy applied in the treatment of cancer patients, plasma hemoglobin, serum haptoglobin, total LDH enzyme and LDH isoenzyme distribution levels were measured. In immunological studies immunoproteins were determined quantitatively by immunodiffusion. Patients were irradiated generally by 2 Gy daily doses and measurements of the above factors were made weekly, during a radiation treatment for 4-6 weeks. In most of the cases examined, increase in hemoglobin and haptoglobin values were observed and the time-dependent curves of the changes showed a characteristic shape. The immunosuppressive effect of irradiation was found to be no universe phenomenon, as in some percentage of the cases an increase in the values of the immunoproteins was observed during radiation treatment, especially in grid-irradiation. Cancer patients treated by different type of radiation sources were compared. The effects of 200 kV X-ray, high-energy X-ray, electron and 60-Co-gamma radiation were evaluated and their effectivity compared. A trial was made to differentiate between type of radiation treatment in radiotherapy of cancer and to find the most promising method. (orig.) [de

  16. Investigation on radiation doses to patients in digital radiography

    International Nuclear Information System (INIS)

    Qiu Zhengshuai; Deng Daping; Li Quantai; Song Gang; Su Xu

    2014-01-01

    Objective: To investigate the patients' radiation dose received in digital radiography(DR) and provide basic data for developing diagnostic reference levels. Methods: The patient's ESD was estimated using the TLDs and DAP was measured by the dose-area product meter. The E values were then calculated by the DAP using Monte Carlo data and RefDose software. Measurements were made for twelve types of examination: skull PA, skull LAT, chest PA, chest LAT, abdomen AP, pelvis AP, cervix spine PA, cervix spine LAT, thoracic spine PA, thoracic spine LAT, lumber spine PA and lumber spine LAT. Results: Both kV and mAs varied in the same type of examination for ESD, DAP and E(F = 33.47, 24.68, 43.19, P < 0.05). The dose each time for lumber spine LAT was the highest, reached 4.62 mGy in ESD and 2.26 Gy·cm 2 in DAP, respectively. The E of abdomen AP averaged as 0.59 mSv, higher than that of lumber spine LAT. Even for the same type of examination, the dose from each equipment was different. Conclusions: DR has the potential to reduce the patients' radiation doses. The guidance levels suitable for Chinese population should be established as soon as possible. (authors)

  17. [Eye lens radiation exposure during ureteroscopy with and without a face protection shield: Investigations on a phantom model].

    Science.gov (United States)

    Zöller, G; Figel, M; Denk, J; Schulz, K; Sabo, A

    2016-03-01

    Eye lens radiation exposure during radiologically-guided endoscopic procedures may result in radiation-induced cataracts; therefore, we investigated the ocular radiation exposure during ureteroscopy on a phantom model. Using an Alderson phantom model and eye lens dosimeters, we measured the ocular radiation exposure depending on the number of X-ray images and on the duration of fluoroscopic imaging. The measurements were done with and without using a face protection shield. We could demonstrate that a significant ocular radiation exposure can occur, depending on the number of X-ray images and on the duration time of fluoroscopy. Eye lens doses up to 0.025 mSv were recorded even using modern digital X-ray systems. Using face protection shields this ocular radiation exposure can be reduced to a minimum. The International Commission on Radiological Protection (ICRP) recommendations of a mean eye lens dosage of 20 mSv/year may be exceeded during repeated ureteroscopy by a high volume surgeon. Using a face protection shield, the eye lens dose during ureteroscopy could be reduced to a minimum in a phantom model. Further investigations will show whether these results can be transferred to real life ureteroscopic procedures.

  18. Investigation of characteristics and radiation hardness of the Beetle 1.0 front-end chip

    CERN Document Server

    Van Bakel, N; Jans, E; Klous, S; Verkooijen, H

    2001-01-01

    Noise characteristics of the Beetle 1.0 front-end chip have been investigated as a function of input capacitance. Values for the equivalent noise charge and ballastic deficit have been extracted. Amplification and pulse shape have been studied by varying the bias settings over a wide range. Results are compared with simulations that include realistic impedances at the input and output. The chip has been subjected to 10 Mrad of radiation. Subsequently, its behaviour is measured again and compared to that preceeding the irradiation. Observed radiation damage effects are discussed.

  19. Nuclear Safety Research and Facilities Department annual report 1997

    Energy Technology Data Exchange (ETDEWEB)

    Majborn, B.; Aarkrog, A.; Brodersen, K. [and others

    1998-04-01

    The report presents a summary of the work of the Nuclear Safety Research and Facilities Department in 1997. The department`s research and development activities were organized in four research programmes: Reactor Safety, Radiation protection, Radioecology, and Radioanalytical Chemistry. The nuclear facilities operated by the department include the research reactor DR3, the Isotope Laboratory, the Waste Treatment Plant, and the educational reactor DR1. Lists of staff and publications are included together with a summary of the staff`s participation in national and international committees. (au) 11 tabs., 39 ills.; 74 refs.

  20. Nuclear Safety Research and Facilities Department annual report 1998

    Energy Technology Data Exchange (ETDEWEB)

    Majborn, B.; Brodersen, K.; Damkjaer, A.; Hedemann Jensen, P.; Nielsen, S.P.; Nonboel, E

    1999-04-01

    The report present a summary of the work of the Nuclear Safety Research and Facilities Department in 1998. The department`s research and development activities were organized in two research programmes: `Radiation Protection and Reactor Safety` and `Radioecology and Tracer Studies`. The nuclear facilities operated by the department include the research reactor DR3, the Isotope Laboratory, the Waste Treatment plant, and the educational reactor DR1. Lsits of staff and publications are included together with a summary of the staff`s participation in national and international committees. (au)

  1. Medical basis for radiation accident preparedness

    International Nuclear Information System (INIS)

    Huebner, K.F.; Fry, S.A.

    1980-01-01

    The International Conference on The Medical Basis for Radiation Accident Preparedness was organized by the staff of the Radiation Emergency Assistance Center/Training Site (REAC/TS) of the Medical and Health Sciences Division of Oak Ridge Associated Universities (ORAU). The philosophical importance of relating, through investigation and education, the intellectual resources of higher education to the important social problems associated with energy, health, and the environment was the foundation of the meeting. The symposium, held under the auspices of the US Department of Energy, was the ninth since 1960 of a series of international conferences addressing the various aspects of radiation accidents. The approach of this most recent conference differed somewhat from that of those preceding it, in that it sought an international review of the gamut of the medical aspects of radiation injury, not only for the experts in the field, but also for other physicians and scientists who, in view of current events, have had the need to know thrust upon them. Individual entries were made for the separate papers

  2. Mechanisms of radiation interaction with DNA: Potential implications for radiation protection

    International Nuclear Information System (INIS)

    1988-01-01

    The Office of Health and Environmental Research (OHER) of the US Department of Energy conducts a broad multidisciplinary research program which includes basic biophysics, biophysical chemistry, molecular and cellular biology as well as experimental animal studies and opportunistic human studies. This research is directed at understanding how low levels of radiation of various qualities produce the spectrum of biological effects that are seen for such exposures. This workshop was entitled ''Mechanisms of Radiation Interaction with DNA: Potential Implications for Radiation Protection.'' It ws jointly sponsored by the Department of Energy and the Commission of European Communities. The aim of the workshop was to review the base of knowledge in the area of mechanisms of radiation action at the DNA level, and to explore ways in which this information can be applied to the development of scientifically sound concepts and procedures for use in the field of radiation protection. The overview of research provided by this multidisciplinary group will be helpful to the Office in program planning. This report includes a summary of the presentations, extended abstracts, the meeting agenda, research recommendations, and a list of participants. Individual papers are processed separately for the data base

  3. Mechanisms of radiation interaction with DNA: Potential implications for radiation protection

    Energy Technology Data Exchange (ETDEWEB)

    1988-01-01

    The Office of Health and Environmental Research (OHER) of the US Department of Energy conducts a broad multidisciplinary research program which includes basic biophysics, biophysical chemistry, molecular and cellular biology as well as experimental animal studies and opportunistic human studies. This research is directed at understanding how low levels of radiation of various qualities produce the spectrum of biological effects that are seen for such exposures. This workshop was entitled ''Mechanisms of Radiation Interaction with DNA: Potential Implications for Radiation Protection.'' It ws jointly sponsored by the Department of Energy and the Commission of European Communities. The aim of the workshop was to review the base of knowledge in the area of mechanisms of radiation action at the DNA level, and to explore ways in which this information can be applied to the development of scientifically sound concepts and procedures for use in the field of radiation protection. The overview of research provided by this multidisciplinary group will be helpful to the Office in program planning. This report includes a summary of the presentations, extended abstracts, the meeting agenda, research recommendations, and a list of participants. Individual papers are processed separately for the data base.

  4. Investigation of the protection possibilities against enhanced radiation warhead

    International Nuclear Information System (INIS)

    Sahin, S.; Erisen, A.; Selvi, S.; Yalcin, S.

    1980-01-01

    To evaluate an enhanced radiation protection for the tank crew against the neutron bomb, we first have analysed the propagation of the 14.1 MeV neutron in air in S 8 approximation. Three new tank wall proposals for enhanced radiation protection have been discussed in S 4 approximation. The best protection for the tank crew against the neutron bomb radiation has been achieved by covering the internal tank wall with a borated polyethylene layer. However the radiation damage through the neutron bomb cannot be degradated to the radiation damage level by a standard nuclear warhead of comparable energy release. In the course of this study a 27 group hard spectra data library has been used. (orig.) 891 HP/orig. 892 CKA [de

  5. Radiobiology Department. Report of Activities 1977-1980

    International Nuclear Information System (INIS)

    1982-02-01

    The different research activities carried out by the Radiobiology Department of the CNEA over the 4-year period 1977-1980 are summarized. These activities were devoted to the study of the effects of radiation on different biological systems, to the search for adequate experimental models, and to the development of techniques permiting a correct evaluation of the information obtained. Topics covered are genetics, microbiology, somatic effects of radiation, pathology and the operation of the animal's house. (M.E.L.) [es

  6. Radiation hazards in the nuclear medicine

    International Nuclear Information System (INIS)

    Roo, M.J.K. de

    1981-01-01

    After a survey of the actual situation of nuclear medicine in Belgium, the evolution of nuclear medicine is studied with regard to quantitative aspects (tracerquantities, number of radioisotopic explorations, number of certified doctors) and qualitative aspects (use of short living isotopes emitting low energy radiation, introduction of in vitro tests). Taking these data into consideration, the exposure of nuclear medicine staff by external or internal radiation is evaluated. From this study it appears that the radiation exposure of the personnel of nuclear medicine departments remains low if proper manipulation methods and simple protective devices are used and if there is an efficient collaboration with an active health physics department or radiation control organism. (author)

  7. Radiation Hazard control report

    International Nuclear Information System (INIS)

    Morishima, Hiroshige; Koga, Taeko; Inagaki, Masayo; Miki, Ryota; Aoki, Yutaka; Takiguchi, Chizuko; Hutai, Yasuhiro; Sakamoto, Norihiko; Okazaki, Koji

    1992-01-01

    The results of radiation control for one year from April, 1991 to March, 1992 in the Atomic Energy Research Institute of Kinki University are reported. As for the persons engaging in radiation-related works as of April, 1991, 57 teachers in the Atomic Energy Research Institute and the Faculties of Science and Engineering, Pharmacology and Agriculture, 17 students of Department of Science and Engineering who utilize the reactor facility for graduation research, and 55 students of Department of Science and Engineering and others as the persons engaging in radiation-related works regarding the law on injury prevention, 129 persons in total became the object of radiation control. The state of operation of the nuclear reactor in fiscal year 1991 was the highest thermal output 1 W, the cumulative thermal output 362.62 Wh, and the total time of operation was 563.27 h. The operation of the neutron generator was carried out for 1.17 h because of the periodic inspection and the trial operation. In personal control, the abnormality due to radiation exposure was not found. The radiation control in laboratories and in fields are reported. (K.I.)

  8. Investigation the structural and functional changes of heart in elderly soldiers who was working with radiation producing equipments

    International Nuclear Information System (INIS)

    Li Jiahua; Li Li; Cao Hongliu; Wang Quanhong; Huang Fang

    2010-01-01

    Objective: To investigate the structural and functional changes of heart in elderly soldiers who was working with radiation producing equipments. The involvement of cardiovascular system in radiation and its intensity was investigated in this study. Methods: Fifty elderly males (>60 years old) who were exposed to radiation producing equipments (exposure group) and 50 elderly (>60 years old) retired male commanders without radiation exposure history (control group) were enrolled in this study. Echocardiographic evaluation of cardiac structure and function was conducted with Siemens Sonline G60 ultrasound system. 12-lead electrocardiogram (ECG) and routine physical examination had also been done in both groups. Results: Ejection fraction, minor axis reduced rate had no distinct difference between exposure group and control group (t=1.52 and t=1.68, P>0.05). Cardiac output, cardiac stroke volume, stroke index, ventricular diastolic flow velocity E/A ratios in exposure group were lower than control group (t=11.81, t=7.11 and t=7.88, P 2 =9.72, and χ 2 =5.19, P<0.05). Conclusion: Chronic low dose radiation may have effects on the cardiovascular sys-tem, so dynamic monitoring of changes in cardiac structure and function is worth on the safety and health for persons who may exposure to radiation and help to prevent early and long-term effects of radiation. (authors)

  9. Quality control of mammography departments in Slovakia

    International Nuclear Information System (INIS)

    Horvathova, M.; Nikodemova, D.

    2007-01-01

    Complete test of publication follows. Considering the fact that mammary gland is the most sensitive organ to ionizing radiation, the Commission of the Ministry of Health of SR for QA in radiology organized a pilot two-run country wide audit conducted in 42 mammography departments that have met the beforehand criteria. During the audit the methods for establishing the individual parameters in technical and clinical part of quality assurance in mammography were elaborated and implemented. Technical and clinical parameters of the imaging process that mostly affect the quality of diagnostic information were followed up. These parameters included: the object thickness compensation, optical density deviation, evaluation of the film quality by means of special phantom, etc. Important measurement of ESDs at participating departments enabled to compare the radiation load of mammography patients in Slovakia with reference values in European guidelines. The uniform standard method for QA at mammography departments was elaborated and published as the regulation of the Ministry of Health for performance of preventive mammography examinations in SR. The presented results show the improved quality of mammography examinations due to regular check-ups of technical and clinical parameters and fulfilment of the required values in all parameters. The audit results are the basis for continuous quality assessment of mammography departments as a main prerequisite for conducting preventive examinations and for health insurance purposes.

  10. Investigating the interaction of x-ray free electron laser radiation with grating structure

    NARCIS (Netherlands)

    Gaudin, J.; Ozkan, C.; Chalupsky, J.; Bajt, S.; Burian, T.; Vysin, L.; Coppola, N.; Farahani, S. D.; Chapman, H. N.; Galasso, G.; Hajkova, V.; Harmand, M.; Juha, L.; Jurek, M.; Loch, R. A.; Möller, S.; Nagasono, M.; Stormer, M.; Sinn, H.; Saksl, K.; Sobierajski, R.; Schulz, J.; Sovak, P.; Toleikis, S.; Tiedtke, K.; Tschentscher, T.; Krzywinski, J.

    2012-01-01

    The interaction of free electron laser pulses with grating structure is investigated using 4.6 +/- 0.1 nm radiation at the FLASH facility in Hamburg. For fluences above 63.7 +/- 8.7 mJ/cm(2), the interaction triggers a damage process starting at the edge of the grating structure as evidenced by

  11. Corrosion of lead shielding in a radiology department

    International Nuclear Information System (INIS)

    Schick, D.K.; CAsey, R.N.; Sim, L.H.; Siddle, K.J.

    1999-01-01

    Corrosion of lead sheet used for structural radiation protection in the Princess Alexandra Hospital Radiology Department has been identified. The corrosion is thought to have been caused by organic acid vapours released from oregon timber wall panelling. Non-destructive testing (NDT) and X-ray transmission measurements were used to define the extent and severity of damage, and subsequently to provide the data necessary for estimation of staff and public radiation doses. Although radiation dose limits have not been exceeded, corrective actions including structural modifications and staff information sessions have been undertaken. Copyright (1999) Blackwell Science Pty Ltd

  12. Investigation of radioactive pollution on land at Thule and assessment of radiation doses

    International Nuclear Information System (INIS)

    2011-12-01

    Risoe National Laboratory at the Technical University of Denmark has carried out research on the terrestrial contamination in the Thule area, Greenland, after the radioactive contents of four nuclear weapons were dispersed following the crash of an American B-52 bomber in 1968. The results of this research are described in the report ''Thule-2007 - Investigation of radioactive pollution on land''. Based on this report, the National Board of Health made an assessment of radiation doses and the risk for individuals in the Thule area. The results of the assessment are described in the report ''The Thule accident. Assessment of radiation doses from terrestrial radioactive contamination''. The present report is a summary of these two reports. (ln)

  13. Numerical investigation on target implosions driven by radiation ablation and shock compression in dynamic hohlraums

    Energy Technology Data Exchange (ETDEWEB)

    Xiao, Delong; Sun, Shunkai; Zhao, Yingkui; Ding, Ning; Wu, Jiming; Dai, Zihuan; Yin, Li; Zhang, Yang; Xue, Chuang [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)

    2015-05-15

    In a dynamic hohlraum driven inertial confinement fusion (ICF) configuration, the target may experience two different kinds of implosions. One is driven by hohlraum radiation ablation, which is approximately symmetric at the equator and poles. The second is caused by the radiating shock produced in Z-pinch dynamic hohlraums, only taking place at the equator. To gain a symmetrical target implosion driven by radiation ablation and avoid asymmetric shock compression is a crucial issue in driving ICF using dynamic hohlraums. It is known that when the target is heated by hohlraum radiation, the ablated plasma will expand outward. The pressure in the shocked converter plasma qualitatively varies linearly with the material temperature. However, the ablation pressure in the ablated plasma varies with 3.5 power of the hohlraum radiation temperature. Therefore, as the hohlraum temperature increases, the ablation pressure will eventually exceed the shock pressure, and the expansion of the ablated plasma will obviously weaken the shock propagation and decrease its velocity after propagating into the ablator plasma. Consequently, longer time duration is provided for the symmetrical target implosion driven by radiation ablation. In this paper these processes are numerically investigated by changing drive currents or varying load parameters. The simulation results show that a critical hohlraum radiation temperature is needed to provide a high enough ablation pressure to decelerate the shock, thus providing long enough time duration for the symmetric fuel compression driven by radiation ablation.

  14. Radiotherapy equipment and departments in the European countries

    DEFF Research Database (Denmark)

    Grau, Cai; Defourny, Noémie; Malicki, Julian

    2014-01-01

    BACKGROUND: Documenting the distribution of radiotherapy departments and the availability of radiotherapy equipment in the European countries is an important part of HERO - the ESTRO Health Economics in Radiation Oncology project. HERO has the overall aim to develop a knowledge base...... of the provision of radiotherapy in Europe and build a model for health economic evaluation of radiation treatments at the European level. The aim of the current report is to describe the distribution of radiotherapy equipment in European countries. METHODS: An 84-item questionnaire was sent out to European...... countries, principally through their national societies. The current report includes a detailed analysis of radiotherapy departments and equipment (questionnaire items 26-29), analyzed in relation to the annual number of treatment courses and the socio-economic status of the countries. The analysis is based...

  15. Use of radiations and radioisotopes for investigating problems connected with parasitic diseases of animals in India

    International Nuclear Information System (INIS)

    Tewari, H.C.; Singh, K.S.

    1979-01-01

    The status of the present knowledge regarding the use of isotopes and radiations for studies of animal parasitic diseases in India is reviewed. The concepts in immunology of metazoan parasites with relevance to vaccination have been discussed. A brief review of radiation attenuated vaccines against certain economically important species of helminth parasites and the use of radioisotopes for pathophysiological investigations and for the study of anthelmintic activity is given. (auth.)

  16. An investigation of infection control for x-ray cassettes in a diagnostic imaging department

    International Nuclear Information System (INIS)

    Fox, Matthew; Harvey, Jane M.

    2008-01-01

    Introduction: This research was conducted to investigate if X-ray cassettes could be a possible source of pathogens capable of causing nosocomial infections, and if they could be a possible vector for cross infection within the hospital environment. Method: The research involved the swabbing of X-ray cassettes in a Diagnostic Imaging Department of a large hospital in the east of England. Two areas of the Diagnostic Imaging Department were included in the study. Research concentrated on X-ray cassettes used for mobile radiography, accident and emergency and inpatient use. Forty cassettes were swabbed in total specifically for general levels of bacterial contamination, also for the presence or absence of methicillin-resistant Staphylococcus aureus (MRSA). A mapping exercise was completed following the location of an X-ray cassette typically used in mobile radiography. The exercise noted the level of direct contact with patient's skin and other possible routes of infection. Results: The results demonstrated that there were large levels of growth of samples taken from cassettes and developed in the Microbiology Department. Coagulase-negative Staphylococcus, Micrococci, Diptheroids and species of Bacillus were all identified. The mapping exercise in which the journey of a 35/43 cm cassette used for mobile radiography was tracked found that contact with patient's skin and potential pathogens or routes of cross infection was a common occurrence whilst undertaking mobile radiography. Conclusion: The research has identified the presence of bacterial contamination on cassettes. The research established that X-ray cassettes/imaging plates are often exposed to pathogens and possible routes of cross infection; also that patient's skin often comes directly in contact with the X-ray cassette/imaging plate. The research also shows that as cassettes/imaging plates are a potential source of cross infection, the Diagnostic Imaging Department may be partly responsible for adding to

  17. Investigation of the use of Ishiagu Galena Concrete in E-M Radiation Sheilding

    Directory of Open Access Journals (Sweden)

    Gabriel Ndubisi EGWUONWU

    2012-08-01

    Full Text Available Galena samples, collected from Ishiagu, south-eastern Nigeria, were used to make concretes for experimental radiation shielding. The concretes were moulded into cylindrical tablets of various densities in order to ascertain their attenuation capability to some electromagnetic radiations. Blue visible light and gamma-ray (455-500 nm sourced from cobolt-60, were transmitted through the concretes and detected with the aid of Op-Amp and digital Geiger-Muller Counter respectively. The absorption coefficients of the samples of thicknesses in the range of 1.00 mm – 5.00 cm were determined. Results obtained show that a typical Ishiagu galena concrete of about 2.80 g/cm3 has the capacity of shielding visible blue light with about 2.51 mm TVL and 0.81 mm HVL. It also shows that the concrete of similar density can optimally shield gamma radiation with about 5.06 cm TVL and 1.53 cm HVL. The results of the investigation however, suggest the shielding and engineering properties of the galena sourced from Ishiagu. A database of shielding strength for the insitu galena was established hence, can serve as suitable platform for quality and quantity control in radiation shielding technology and can be used in high voltage radiotherapy rooms and nuclear reactors.

  18. Department of Nuclear Reactions: Overview

    International Nuclear Information System (INIS)

    Rusek, K.

    2003-01-01

    Full text: In 2002, the Department has been involved in two new experimental programmes. Our colleagues led by Prof. Pawel Zupranski joined a large international collaboration HERMES and took part in experiments at DESY devoted to the study of the spin structure of the nucleon. Another group directed by Associate Prof. Bogdan Zwieglinski has worked on a conceptual design of a new generation detector PANDA (Proton-Antiproton Detection) which will be used in future experiments at GSI. Moreover, the experimental programmes covering three major domains of our scientific activities: nuclear physics, materials research and atomic physics were continued. - Nuclear physics: Experimental studies of nuclear reactions induced by heavy ions provided by the Warsaw U-200P Cyclotron were performed in collaboration with scientists from the Institute for Nuclear Studies in Kiev, Ukraine. The aim of the experiments was to investigate isotopic effects in the scattering of 11 B from carbon nuclides. Also, excited states of 6 Li predicted theoretically but never seen in experiments were investigated by means of one-neutron transfer reactions. Proton induced reactions were investigated theoretically by means of the multistep-direct model. Good agreement with the experimental data was achieved. The mechanism of fragments production in collisions of 197 Au with a gold target in the wide range of energies was studied by ALADIN and INDRA Collaborations. The production of η mesons from proton - proton collisions was investigated experimentally at the Juelich Cooler Synchrotron COSY. - Atomic physics: The ionisation of Au, Bi, Th and U atoms by Si ions was investigated in collaboration with the Swietokrzyska Academy, Kielce, and the University of Erlangen-Nuernberg. - Materials research: The sensitivity of the Solid State Nuclear Track PM-355 detectors was tested against intensive gamma and electron radiation. Moreover, using a monoenergetic sulphur ion beam from the Warsaw Cyclotron, the

  19. Validity of the linear no-threshold (LNT) hypothesis in setting radiation protection regulations for the inhabitants in high level natural radiation areas of Ramsar, Iran

    International Nuclear Information System (INIS)

    Mortazavi, S.M.J.; Atefi, M.; Razi, Z.; Mortazavi Gh

    2010-01-01

    Some areas in Ramsar, a city in northern Iran, have long been known as inhabited areas with the highest levels of natural radiation. Despite the fact that the health effects of high doses of ionizing radiation are well documented, biological effects of above the background levels of natural radiation are still controversial and the validity of the LNT hypothesis in this area, has been criticized by many investigators around the world. The study of the health effects of high levels of natural radiation in areas such as Ramsar, help scientists to investigate the biological effects without the need for extrapolating the observations either from high doses of radiation to low dose region or from laboratory animals to humans. Considering the importance of these studies, National Radiation Protection Department (NRPD) of the Iranian Nuclear Regulatory Authority has started an integrative research project on the health effects of long-term exposure to high levels of natural radiation. This paper reviews findings of the studies conducted on the plants and humans living or laboratory animals kept in high level natural radiation areas of Ramsar. In human studies, different end points such as DNA damage, chromosome aberrations, blood cells and immunological alterations are discussed. This review comes to the conclusion that no reproducible detrimental health effect has been reported so far. In this paper the validity of LNT hypothesis in the assessment of the health effects of high levels of natural radiation is discussed. (author)

  20. SU-E-P-57: Radiation Doses Assessment to Paediatric Patients for Some Digital Diagnostic Radiology Examination in Emergency Department in Qatar

    Energy Technology Data Exchange (ETDEWEB)

    Abdallah, I; Aly, A; Al Naemi, H [Hamad Medical Corporation, Doha (Qatar)

    2015-06-15

    Purpose: The aim of this study was to evaluate radiation doses to pediatric patients undergoing standard radiographic examinations using Direct Digital Radiography (DDR) in Paediatric emergency center of Hamad General Hospital (HGH) in state of Qatar and compared with regional and international Dose Reference Levels (DRLs). Methods: Entrance Skin Dose (ESD) was measured for 2739 patients for two common X-ray examinations namely: Chest AP/PA, Abdomen. Exposure factors such as kV, mAs and Focal to Skin Distance (FSD) were recorded for each patient. Tube Output was measured for a range of selected kV values. ESD for each individual patient was calculated using the tube output and the technical exposure factors for each examination. The ESD values were compared with the some international Dose Reference Levels (DRL) for all types of examinations. Results: The most performed procedure during the time of this study was chest PA/PA (85%). The mean ESD values obtained from AP chest, PA chest and AP abdomen ranged 91–120, 80–84 and 209 – 659 µGy per radiograph for different age’s groups respectively. Two protocols have been used for chest AP and PA using different radiological parameters, and the different of ESD values for chest PA and were 41% for 1 years old child, 57% for 5 years old for chest AP. Conclusion: The mean ESD were compared with those found in literature and were found to be comparable. The radiation dose can be reduced more for Chest AP and PA examination by optimization of each investigation and hence more studies are required for this task. The results presented will serve as a baseline data needed for deriving local reference doses for pediatric X-ray examinations in this local department and hence it can be applied in the whole Qatar.

  1. Radiation physics, biophysics, and radiation biology

    International Nuclear Information System (INIS)

    Hall, E.J.; Zaider, M.; Delegianis, M.J.

    1989-07-01

    An important event of the year was the designation of our Laboratory as a Center for Radiological Research by the Dean of the Faculty of Medicine and Vice-President for Health Sciences. Center status acknowledges the size and importance of the research efforts in this area, and allows a greater measure of independence in administrative matters. While the name has changed from a Laboratory to a Center within the Medical School, the mission and charge remain the same. The efforts of the Center are a multidisciplinary mix of physics, chemistry, and biology, mostly at a basic level, with the admixture of a small proportion of pragmatic or applied research in support of radiation protection or radiation therapy. About a quarter of our funding, mostly individual research awards, could be regarded as in direct support of radiotherapy, with the remainder (an NCI program project grant and DOE grants) being in support of research addressing more basic issues. An important effort currently underway concerns ab-initio calculations of the dielectric response function of condensed water. This investigation has received the coveted designation, ''Grand Challenge Project,'' awarded by DOE to research work which represents ''distinct advance on a major scientific or engineering problem that is broadly recognized as important within the mission of the Department.''

  2. 14 CFR 23.1023 - Oil radiators.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Oil radiators. 23.1023 Section 23.1023 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS... radiators. Each oil radiator and its supporting structures must be able to withstand the vibration, inertia...

  3. The typical steps of radiation processes development. Experience in investigation, designing and application

    International Nuclear Information System (INIS)

    Babkin, I. Yu.

    1983-01-01

    The typical steps of radiation processes development are discussed as: primary laboratory investigations; primary economic evaluation; more exact estimation of situation in industry; comparative analysis; development of a flow sheet; pilot plant; obtaining of initial data for designing of industrial scale plant; prediction of industrial situation; designing of semi-industrial or industrial plant; industrial plant. (U.K.)

  4. Experience with first aid in radiation sources accidents

    International Nuclear Information System (INIS)

    Klener, V.

    1979-01-01

    More than 20 years of experience at the Radiation Hygiene Centre of the Prague Institute of Hygiene and Epidemiology with prevention of accidents involving sources of radiation and the Centre's participation in providing medical aid in such accidents are described. A list is given of major types of accidents over the past decade. Prevalent were accidents involving sealed gamma sources, resulting in excessive local irradiation with serious skin damage or injury to some of the deeper structures of the hands, requiring plastic operation. Chromosomal picture investigation allows the estimation of the equivalent body dose which only reached higher values in a single case recorded (1.5 Gy = 150 rad). Organisational measures are described for emergencies and the task is shown by radiation hygiene departments attached to regional hygiene stations. The present system is capable of providing adequate, prompt and effective assistance. (author)

  5. Experimental and numerical investigation of thermal radiator performances as a source of heat energy in design of dryer simulation

    Science.gov (United States)

    Wiryanta, I. K. E. H.; Adiaksa, I. M. A.

    2018-01-01

    The purposes of this research was to investigate the temperature performance of tube and fins car radiator experimentally and numerically. The experiment research was carried out on a simulation design consists of a reservoir water tank, a heater, pump to circulate hot water to the radiator and a cooling fan. The hot water mass flow rate is 0.486 kg/s, and the cooling air velocity of the fan is 1 m/s. The heat transfer rate and the effectiveness of radiator were investigated. The results showed that the exhaust heat transfer rate from the radiator tended to increase over time, with an average heat transfer rate of 3974.3 Watt. The maximum heat transfer rate was 4680 Watt obtained at 6 minutes. The effectiveness of the radiator (ε) over time tends to increase with an average of ε = 0.3 and the maximum effectiveness value was obtained at 12 minutes i.e. 0.35. The numerical research conducted using CFD method. The geometry and meshing created using ANSYS Workbench and the post processing using Fluent. The simulation result showed the similarity with the experimental research. The temperatures of air-side radiator are about 45°C.

  6. 'Radiation Fair' for 15 years in Osaka, Japan, and survey of the participants attitude toward radiation

    International Nuclear Information System (INIS)

    Furuta, Masakazu; Asano, Takeyoshi; Hayashi, Toshio; Hosokawa, Yasushi; Kakefu, Tomohisa; Nishihara, Hideaki

    1999-01-01

    We have been successfully operating 'Radiation Fair--The relationship between daily life and radiation--' during summer vacation season in August every year for 15 years in Osaka, the largest city of western Japan. The purpose of this event is radiation education of public including school kids through efficient information transfer of radiation and radiation-related technology. Currently we set up the space of it on a floor of Kintetsu Department Store, one of the major department stores in downtown Osaka and display various irradiated products available in our daily life together with explanatory panels. We have been devising various attractions as efficient information transfer media so that even elementary-school kids understand the basic knowledge of radiation and irradiation technologies. The number of participants has increased year by year until more than 20,000 in recent years. We distributed questionnaires to the visitors for recent 3 years to inquire their status toward radiation and irradiated products as well as impression toward the displays. The survey results suggest that school education may contribute to establish the public image toward 'radiation' as well as mass media. (author)

  7. Radiation emergency medical preparedness and assistance network in China

    International Nuclear Information System (INIS)

    Su, Xu

    2008-01-01

    Full text: Rapid economic growth in demand has given rise to power shortage in China. The installed capacity of nuclear power has been scheduled to reach 36-40 GW in preliminary plans, which is about 4% of China's energy supply by 2020. On the other hand, the number of radiation facilities rises 7% annually, while this figure for medical accelerators and CT is 15%. With the application of radiation sources increasing, the possibility of accidents exposure is growing. The radiation emergency medical preparedness is increasingly practically challenging. CCMRRE (Chinese Center for Medical Response to Radiation Emergency), which functions as a national and professional institute with departments for clinic, monitoring and evaluating and technical supporting, was established in 1992. Clinic departments of haematological and surgical centres, and specialists in the radiation diagnosis and therapy, is responsible for the medical assistance in radiation accidents. The monitoring and evaluating department with bio-dosimetry, physical dosimetry and radiation monitoring laboratory, concentrates in radiation monitoring, dose estimating of accident exposure. Technical support department with advisors and experts in exposure dose estimating, radiation protecting and injury treating, provides technical instruction in case of nuclear and radiological accidents. In addition, around whole country, local organization providing first assistance, regional clinic treatment and radiation protection in nuclear accidents has been established. To strengthen the capability of radiation emergency medical response and to improve the cooperation with local organization, the managers and involved staffs were trained in skill frequently. The medical preparedness exercise, which mimics the nuclear accidents condition, was organized by CCMRRE and performed in 2007. The performances demonstrated that the radiation emergency medical preparedness and assistance system is prompt, functional and

  8. Investigation of radiation damage effects in neutron irradiated CCD

    International Nuclear Information System (INIS)

    Brau, James E.; Igonkina, Olga; Potter, Chris T.; Sinev, Nikolai B.

    2005-01-01

    A Charge Coupled Devices (CCD)-based vertex detector is a leading option for vertex detection at the future linear collider. A major issue for this application is the radiation hardness of such devices. Tests of radiation hardness of CCDs used in the SLD vertex detector, VXD3, have been reported earlier. The first measurements of 1998 involved a spare VXD3 CCD that was irradiated with neutrons from a radioactive source (Pu-Be), and from a nuclear reactor. In 2003, we had the opportunity to disassemble the VXD3 detector and study the nature of the radiation damage it incurred during 3 years of operation at SLC. In the preparation for this study, additional experiments with the spare VXD3 CCD were performed. These included measurements of trapping times in neutron irradiated CCDs. Results, reported here, will help us better understand the mechanism of radiation damage effects and develop techniques to minimize performance degradation due to radiation damage

  9. Nuclear Safety Research and Facilities Department. Annual report 1999

    International Nuclear Information System (INIS)

    Majborn, B.; Damkjaer, A.; Hedemann Jensen, P.; Nielsen, S.P.; Nonboel, E.

    2000-04-01

    The report presents a summary of the work of the Nuclear Safety Research and Facilities Department in 1999. The department's research and development activities were organized in two research programmes: 'Radiation Protection and Reactor Safety' and 'Radioecology and Tracer Studies'. The nuclear facilities operated by the department include the research reactor DR 3, the Isotope Laboratory, the Waste Management Plant, and the educational reactor DR 1. Lists of staff and publications are included together with a summary of the staff's participation in national and international committees. (au)

  10. Nuclear Safety Research and Facilities Department annual report 1997

    International Nuclear Information System (INIS)

    Majborn, B.; Aarkrog, A.; Brodersen, K.

    1998-04-01

    The report presents a summary of the work of the Nuclear Safety Research and Facilities Department in 1997. The department's research and development activities were organized in four research programmes: Reactor Safety, Radiation protection, Radioecology, and Radioanalytical Chemistry. The nuclear facilities operated by the department include the research reactor DR3, the Isotope Laboratory, the Waste Treatment Plant, and the educational reactor DR1. Lists of staff and publications are included together with a summary of the staff's participation in national and international committees. (au)

  11. Nuclear Safety Research and Facilities Department annual report 1998

    International Nuclear Information System (INIS)

    Majborn, B.; Brodersen, K.; Damkjaer, A.; Hedemann Jensen, P.; Nielsen, S.P.; Nonboel, E.

    1999-04-01

    The report present a summary of the work of the Nuclear Safety Research and Facilities Department in 1998. The department's research and development activities were organized in two research programmes: 'Radiation Protection and Reactor Safety' and 'Radioecology and Tracer Studies'. The nuclear facilities operated by the department include the research reactor DR3, the Isotope Laboratory, the Waste Treatment plant, and the educational reactor DR1. Lsits of staff and publications are included together with a summary of the staff's participation in national and international committees. (au)

  12. Annual report of Radiation Effects Research Foundation, April 1, 1993 - March 31, 1994

    International Nuclear Information System (INIS)

    1995-01-01

    The circumstances that the move of the Hiroshima facilities is in the state of reservation due to the budget reduction of USA government are reported. As to the investigation and research activities, international cooperation has increased remarkably. The council resolved to request United Nations that it designates the Radiation Effects Research Foundation to the organ for inquiring about the effect of radiation on health and gives aid. The change of directors is reported. The research works in fiscal 1993 in Departments of Epidemiology, Pathological Epidemiology, Statistics, Clinical Research (in Hiroshima and Nagasaki), Genetic Biochemical Laboratory and Cell Genetics Laboratory of Genetics Department, Radiation Biology, Radiation Biology (in Nagasaki) are reported. The trend of the research works in fiscal 1994 in respective Departments is described. As to the plan of Research Information Center in fiscal 1994, the abolishment of large computer, the extension of PC network, data base management and the computer processing of office works are described. As to the plan of Research Information Center in fiscal 1995, the completion of the network connection of all computers, the expansion of the data base to input major source data sets, and the introduction of software so as to utilize and retrieve data easily are expected. The abstracts of new research plan papers and the manuscripts contributed to scientific journals are collected. (K.I.)

  13. Radiation protection in Sudan

    International Nuclear Information System (INIS)

    Elamin, O.I.; Hajmusa, E.A.; Shaddad, I.A.

    2001-01-01

    The regulatory framework as established by the Sudan Atomic Energy Commission (SAEC) Act, promulgated in 1996, is described in the report. Three levels of responsibility in meeting radiation protection requirements are established: the Board, the Radiation Protection Technical Committee as the competent authority in the field of radiation protection, and the SAEC Department of Radiation Protection and Environmental Monitoring as the implementing technical body. The report also refers to environmental activities, patient doses in diagnostic radiology, the management of disused sources, emergency preparedness and orphan sources, and the national training activities in the radiation protection field. (author)

  14. Investigation of efficient termination structure for improved breakdown properties of semiconductor radiation detectors

    International Nuclear Information System (INIS)

    Krizaj, D.; Resnik, D.; Vrtacnik, D.; Amon, S.

    1998-01-01

    Efficiency of a new junction termination structure for improvement of breakdown properties of semiconductor radiation detectors is investigated. The structure consists of a diffused resistor winding around the active junction in a spiral fashion. The current flow through the spiral enables controlled potential distribution along the spiral turns and thus controlled depletion spreading from the main junction, efficiently preventing premature avalanche breakdown. Both multiple guard-ring structures and spiral junction termination structures have shown good breakdown properties typically three to five times higher than breakdown voltages of diodes without junction termination. The breakdown voltages of spiral junction termination structures are only weakly influenced by changes in substrate doping concentration caused by neutron irradiation. They can thus be considered for termination of future semiconductor radiation detectors

  15. Status of radiation education and training in the Philippines

    Energy Technology Data Exchange (ETDEWEB)

    Bernido, C.C. [Philippine Nuclear Research Institute, Commonwealth Avenue, Diliman, Quezon (Philippines)

    1999-09-01

    There are three major sources and levels of obtaining radiation or nuclear education and training in the Philippines: the secondary schools or high schools; colleges and universities; and training courses in nuclear science and radiation protection offered by government agencies such as the Philippine Nuclear Research Institute (PNRI) of the Department of Science and Technology and the Radiation Health Service (RHS) of the Department of Health. This paper summarizes the status, some of the activities and some of the problems of radiation education in the Philippines. (author)

  16. Status of radiation education and training in the Philippines

    International Nuclear Information System (INIS)

    Bernido, C.C.

    1999-01-01

    There are three major sources and levels of obtaining radiation or nuclear education and training in the Philippines: the secondary schools or high schools; colleges and universities; and training courses in nuclear science and radiation protection offered by government agencies such as the Philippine Nuclear Research Institute (PNRI) of the Department of Science and Technology and the Radiation Health Service (RHS) of the Department of Health. This paper summarizes the status, some of the activities and some of the problems of radiation education in the Philippines. (author)

  17. Natural radiation environment

    International Nuclear Information System (INIS)

    Vohra, K.G.; Mishra, U.C.; Pillai, K.C.; Sadasivan, S.

    1982-01-01

    The volume presented contains papers presented at the Second Special Symposium on Natural Radiation Environment held at Bombay, India, during January 1981. The papers deal with such topics as : 1)high natural radiation background areas; 2)environmental natural radioactivity; 3)measurement techniques; 4)technologically enhanced radioactivity; 5)indoor radiation environment; 6)radon and daughters in ambient air, and 7)applications in Geosciences. Each of the 87 papers presented has been abstracted and indexed for the U.S. Department of Energy Technical Information Center's Energy Data Base

  18. Applied radiation chemistry - the present status in the Institute for Nuclear Research Academia Sinica (INRAS)

    International Nuclear Information System (INIS)

    Nian-yun, L.

    1981-01-01

    The department of radiation chemistry in INRAS is one of the research centers of radiation chemistry in China. Since its establishment in 1958, basic theoretical and applied radiation chemistry have been extensively studied and promoted. In the field of applied radiation chemistry of polymers, radiation modification of polymeric systems is an important and active branch. Materials such as permselective membranes based on different polymer films have been prepared by means of radiation crosslinking and grafting. Superfine powdered wax, which may be used for the preparation of special lubricating grease of high quality, has been obtained via radiation degradation of PTFE (polytetrafluoroethylene). As for applied organic radiation chemistry, the main technological conditions of preparation of alkane sulfonic acid by radiation sulphoxidation of n-paraffin were optimized and the radiation sensitization effects of halogenated alkane and acetic anhydride on the indicated system were studied. The radiation stability of linear conjugated molecules and the related effects of intra- and intermolecular radiation protection were particularly investigated. These studies are described. (author)

  19. Radiation effects on materials in high-radiation environments

    International Nuclear Information System (INIS)

    Weber, W.J.; Mansur, L.K.; Clinard, F.W. Jr.; Parkin, D.M.

    1991-01-01

    A workshop on Radiation Effects on Materials in High-Radiation Environments was held in Salt Lake City, Utah (USA) from August 13 to 15, 1990 under the auspices of the Division of Materials Sciences, Office of Basic Energy Sciences, US Department of Energy. The workshop focused on ceramics, alloys, and intermetallics and covered research needs and capabilities, recent experimental data, theory, and computer simulations. It was concluded that there is clearly a continuing scientific and technological need for fundamental knowledge on the underlying causes of radiation-induced property changes in materials. Furthermore, the success of many current and emerging nuclear-related technologies critically depend on renewed support for basic radiation-effects research, irradiation facilities, and training of scientists. The highlights of the workshop are reviewed and specific recommendations are made regarding research needs. (orig.)

  20. Effect of ionizing radiation on radionuclide speciation: Preliminary results from site-specific experiments in a basaltic system

    International Nuclear Information System (INIS)

    Reed, D.T.; Burnell, J.R.

    1986-01-01

    Rockwell Hanford Operations, under contract to the Department of Energy, is investigating the suitability of the Hanford site in the state of Washington as a high level nuclear waste repository. An important consideration in these investigations is the effect of ionizing radiation on the speciation of radionuclides in the groundwater after the high-level-waste container has been breached and there is direct contact between the groundwater and the waste form (controlled released period). The effect of ionizing radiation on radionuclide speciation depends on the radiation environment and site-specific chemistry near the waste container. With respect to these two aspects, the following results will be presented: a definition of the radiation environment during the controlled release period; preliminary site-specific experimental results: (1) basaltic systems spiked with radionuclides; (2) spent fuel-groundwater-basalt experiments

  1. 3D PiC code investigations of Auroral Kilometric Radiation mechanisms

    International Nuclear Information System (INIS)

    Gillespie, K M; McConville, S L; Speirs, D C; Ronald, K; Phelps, A D R; Bingham, R; Cross, A W; Robertson, C W; Whyte, C G; He, W; Vorgul, I; Cairns, R A; Kellett, B J

    2014-01-01

    Efficient (∼1%) electron cyclotron radio emissions are known to originate in the X mode from regions of locally depleted plasma in the Earths polar magnetosphere. These emissions are commonly referred to as the Auroral Kilometric Radiation (AKR). AKR occurs naturally in these polar regions where electrons are accelerated by electric fields into the increasing planetary magnetic dipole. Here conservation of the magnetic moment converts axial to rotational momentum forming a horseshoe distribution in velocity phase space. This distribution is unstable to cyclotron emission with radiation emitted in the X-mode. Initial studies were conducted in the form of 2D PiC code simulations [1] and a scaled laboratory experiment that was constructed to reproduce the mechanism of AKR. As studies progressed, 3D PiC code simulations were conducted to enable complete investigation of the complex interaction dimensions. A maximum efficiency of 1.25% is predicted from these simulations in the same mode and frequency as measured in the experiment. This is also consistent with geophysical observations and the predictions of theory.

  2. GLERL Radiation Transfer Through Freshwater Ice

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Radiation transmittance (ratio of transmitted to incident radiation) through clear ice, refrozen slush ice and brash ice, from ice surface to ice-water interface in...

  3. Investigation of radiation emissions from video display terminals

    International Nuclear Information System (INIS)

    Zuk, W.M.; Stuchly, M.A.; Dvorak, P.; Deslauriers, Y.

    1983-01-01

    This report presents and discusses the results of radiation emission measurements carried out on video display terminals (VDTs) by the Radiation Protection Bureau. While the report is not intended to be an exhaustive review of all of the world literature on the subject, the more important studies performed on VDTs are summarized and reviewed. Attention is drawn to recent information which has not yet become generally available

  4. Department of Clinical Investigation Annual Research Progress Report, Fiscal Year 1985,

    Science.gov (United States)

    1985-10-01

    Kolina JS: Infantile Infectious Sacroilitis. Ped Radiology 15(6):403-05, 1985. DEPARTMENT OF SURGERY Publications: * Arciero RA, Shishido NS, Parr...Dependent Diabetic and Chronic Cardiac Disease in Children and Adolescents. National Academy of Neuropsychologists, 17 Oct 85, Philadelphia, PA. DEPARTMENT...Effect of Rapid, Short Term Blood Glucose Control on 100 " #83/37 Leukocyte Function in Diabetic Patients (0) * TREECE, G.L. Treatment of Graves

  5. FEATURES OF SCIENTIFIC INVESTIGATIONS CONDUCTED IN THE LABORATORIES OF THE DEPARTMENT OF WATER SUPPLY OF MGSU

    Directory of Open Access Journals (Sweden)

    Nikitina Irina Nikolaevna

    2016-03-01

    Full Text Available The article focuses on the work of the laboratories of the Department of Water Supply of MGSU. The laboratory of pipe-lines, pumping equipment and sanitary equipment operates in MGSU affiliated to the department of water supply. A hydraulic stand for testing and defining the the hydraulic characteristics of pressure and free-flow pipelines of water supply and sewerage systems is installed there. There are also stands for investigating the sanitary equipment of the buildings, the fire and hot water supply systems. The main research directions of the department of water supply are diverse: hydraulics of water supply systems, recon-struction of pipelines using trenchless technologies, reliable water supply and distribution systems, purification of natural water for drinking and industrial water supply, post-treatment of natural water for domestic water supply, resource conservation in domes-tic water supply systems, etc. The laboratory also has a computer lab, able to simultane-ously hold up to 30 students. In collaboration with the laboratory there operates a scien-tific circle for students and Master students, which provides a lot of interesting and useful information on the latest developments.

  6. Nuclear Safety Research and Facilities Department. Annual report 1999

    Energy Technology Data Exchange (ETDEWEB)

    Majborn, B.; Damkjaer, A.; Hedemann Jensen, P.; Nielsen, S.P.; Nonboel, E. [eds.

    2000-04-01

    The report presents a summary of the work of the Nuclear Safety Research and Facilities Department in 1999. The department's research and development activities were organized in two research programmes: 'Radiation Protection and Reactor Safety' and 'Radioecology and Tracer Studies'. The nuclear facilities operated by the department include the research reactor DR 3, the Isotope Laboratory, the Waste Management Plant, and the educational reactor DR 1. Lists of staff and publications are included together with a summary of the staff's participation in national and international committees. (au)

  7. Nuclear Safety Research and Facilities Department annual report 1999

    DEFF Research Database (Denmark)

    Majborn, B.; Damkjær, A.; Jensen, Per Hedemann

    2000-01-01

    The report presents a summary of the work of the Nuclear Safety Research and Facilities Department in 1999. The department´s research and development activities were organized in two research programmes: "Radiation Protection and Reactor Safety" and"Radioecology and Tracer Studies". The nuclear...... facilities operated by the department include the research reactor DR 3, the Isotope Laboratory, the Waste Management Plant, and the educational reactor DR 1. Lists of staff and publications are includedtogether with a summary of the staff´s participation in national and international committees....

  8. Nuclear Safety Research and Facilities department annual report 1996

    International Nuclear Information System (INIS)

    Majborn, B.; Brodersen, K.; Damkjaer, A.; Floto, H.; Heydorn, K.; Oelgaard, P.L.

    1997-04-01

    The report presents a summary of the work of the Nuclear Safety Research and Facilities Department in 1996. The Department's research and development activities are organized in three research programmes: Radiation Protection, Reactor Safety, and Radioanalytical Chemistry. The nuclear facilities operated by the department include the Research Reactor DR3, the Isotope Laboratory, the Waste Treatment Plant, and the Educational Reactor DR1. Lists of staff and publications are included together with a summary of the staff's participation in national and international committees. (au) 2 tabs., 28 ills

  9. Department of Genetics

    International Nuclear Information System (INIS)

    2000-01-01

    Full text: There are five independent research groups in the Department conducting the following lines of investigations: 1. Regulation of sulfur amino acid metabolism in fungi, focusing on cloning and characterisation of structural and regulatory genes in Aspergillus nidulans. 2. Identification and characterization of S. cerevisiae genes involved in the regulation of tRNA biosynthesis and control of translation fidelity in cytosolic and mitochondrial systems. 3. Mechanism of DNA repair and mutagenesis by using mutations in DNA polymerases, mismatch repair and radiation sensitivity genes to study their influence on the generation of mutations in nondividing, resting cells (adaptive mutations) in S. cerevisiae. 4. Pleiotropic effects of the S. cerevisiae IRR1 gene, particularily on colony formation and sister chromatid cohesion. 5. Regulation of heme synthesis in S. cerevisiae: the analysis of structure-function relationship of ferrochelatase (the last enzyme of the pathway). 6. Role of RSP5 the ubiquitin-protein ligase of S. cerevisiae in protein import to mitochondria and endocytosis of plasma membrane proteins. 7. Molecular analysis of the glucose-6-phosphate dehydrogenase gene in Polish 6-GDP deficient subjects. 8. Genetic and phylogenic studies of the Polish Bison bonasus population with the use of nuclear and mitochondrial markers

  10. Hazards Control Department annual technology review, 1987

    Energy Technology Data Exchange (ETDEWEB)

    Griffith, R.V.; Anderson, K.J. (eds.)

    1988-07-01

    This document describes some of the research performed in the LLNL Hazards Control Department from October 1986 to September 1987. The sections in the Annual report cover scientific concerns in the areas of Health Physics, Industrial Hygiene, Industrial Safety, Aerosol Science, Resource Management, Dosimetry and Radiation Physics, Criticality Safety, and Fire Science. For a broader overview of the types of work performed in the Hazards Control Department, we have also compiled a selection of abstracts of recent publications by Hazards Control employees. Individual reports are processed separately for the data base.

  11. ESR spectroscopic investigations of the radiation-grafting of fluoropolymers

    Energy Technology Data Exchange (ETDEWEB)

    Huebner, G; Roduner, E [University of Stuttgart (Germany); Brack, H P; Scherer, G G [Paul Scherrer Inst. (PSI), Villigen (Switzerland)

    1999-08-01

    ESR spectroscopic investigations have clarified the influence of several preparative parameters on the reaction rates and yields obtained in the radiation-grafting method used at PSI to prepare proton-conducting polymer membranes. At a given irradiation dose, a higher concentration of reactive radical sites was detected in ETFE films than in FEP films. This higher concentration explains the higher grafting levels and rates of the ETFE films found in our previous grafting experiments. Taken together, the in-situ ESR experiments and grafting experiments show that the rates of disappearance of radical species and grafting rates and final grafting levels depend strongly on the reaction temperature and the oxygen content of the system. Average grafted chain lengths were calculated to contain about 1,000 monomer units. (author) 2 figs., 4 refs.

  12. Doses in radiation accidents investigated by chromosome aberration analysis

    International Nuclear Information System (INIS)

    Lloyd, D.C.; Purrott, R.J.; Prosser, J.S.; Lelliott, D.J.; Stimpson, L.D.

    1981-03-01

    The results are reviewed from investigations during 1980 into 68 cases of suspected overexposure to radiation. Of these, 37 were associated with industrial radiography, 11 with one or other of the major nuclear organisations and 20 with an institution of research, education or health. 55 of the dose estimates were in the range 0.0 - 0.09 Gy (0 - 9 rad) 5 in the range 0.1 - 0.29 Gy (10 - 29 rad) and for various reasons in 8 cases no biological assessment of dose was possible. The dose estimate for the case with the highest confirmed overexposure was 0.22 Gy (22 rads). The chromosome data are compared with information obtained from physical dosimetry and a brief summary is given of the circumstances of each case. (author)

  13. Organizational forms of medical care in the event of radiation accidents in the German Democratic Republic

    International Nuclear Information System (INIS)

    Nack, P.; Arndt, D.; Schuettmann, W.

    1977-01-01

    Medical care of radiation casualties in the German Democratic Republic (GDR) is organized on two levels. On the level of users the responsible Medical Officers guarantee both the routine control of persons occupationally exposed to radiation and first aid in the event of accidents. On the second level medical treatment is given either in the Clinical Department of the National Board of Nuclear Safety and Radiation Protection or in specialized national health system clinics having facilities for intensive medical care. A decision on hospitalization is made according to the conditions of the accident and the necessary diagnostic and therapeutic measures as a rule are based on consultations between the responsible Medical Officer and the departments of the Board (Emergency Assistance Service, Clinical Department, Consultative Committee). For serious cases where haematological complications can be expected, a central medical clinic with facilities for bone-marrow transplants is available. The casualties are treated in local clinics which are provided with continuous support and advice by the Board. This support consists in: (i) immediate activity by a consultative committee of the Board's physicians and scientists experienced and trained in radiation protection and the treatment of radiation accidents; (ii) the requirement of compulsory examination methods and take-over of specialized laboratory investigations; and (iii) the use of a mobile emergency measuring system in cases of additional incorporation. It is the main principle of medical care in case of radiation accidents to consult, as early as possible, a medical consultative committee of the Board in the field of radiation protection at each step of medical care. (author)

  14. Background radiation map of Thailand

    International Nuclear Information System (INIS)

    Angsuwathana, P.; Chotikanatis, P.

    1997-01-01

    The radioelement concentration in the natural environment as well as the radiation exposure to man in day-to-day life is now the most interesting topic. The natural radiation is frequently referred as a standard for comparing additional sources of man-made radiation such as atomic weapon fallout, nuclear power generation, radioactive waste disposal, etc. The Department of Mineral Resources commenced a five-year project of nationwide airborne geophysical survey by awarding to Kenting Earth Sciences International Limited in 1984. The original purpose of survey was to support mineral exploration and geological mapping. Subsequently, the data quantity has been proved to be suitable for natural radiation information. In 1993 the Department of Mineral Resources, with the assistance of IAEA, published a Background Radiation Map of Thailand at the scale of 1:1,000,000 from the existing airborne radiometric digital data. The production of Background Radiation Map of Thailand is the result of data compilation and correction procedure developed over the Canadian Shield. This end product will be used as a base map in environmental application not only for Thailand but also Southeast Asia region. (author)

  15. The impact of education on occupational radiation exposure reduction in a diagnostic radiology department

    International Nuclear Information System (INIS)

    Vetter, R.J.; Gray, J.E.

    1987-01-01

    Patient load, number of radiographic exams, complexity of some exams, and associated potential occupational radiation exposure of medical personnel have increased significantly in the past decade. Efforts to reduce exposure through employee education and awareness have resulted in significant reduction in occupational exposure for most diagnostic radiographic areas at Mayo Clinic. This paper reviews trends in occupational radiation exposure from diagnostic x- rays at Mayo Clinic over the past ten years. Changes in employee radiation dose equivalents are correlated with patient workload, complexity of exams, increased interventional radiology and cardiology, and efforts to reduce employee radiation exposure

  16. Comics in Modern Physics: Learning Blackbody Radiation through Quasi-History of Physics

    Science.gov (United States)

    Ozdemir, Ertugrul

    2017-01-01

    The purpose of this study is to create a short comic story about historical emergence of Planck's explanation of blackbody radiation and to investigate what students learn from it and what they think about the usage of comics in modern physics course. The participants are a small group of undergraduate students studying at department of science…

  17. Director's Report on the Activity and Management of the International Bureau of Weights and Measures (BIPM) - (1 January 2013 - 31 December 2013) - Supplement: Ionizing Radiation Department

    International Nuclear Information System (INIS)

    Milton, M.; Los Arcos, J.M.; Burns, D.T.; Kessler, C.; Picard, S.; Roger, P.; Courte, S.; Michotte, C.; Nonis, M.; Ratel, G.

    2014-03-01

    This BIPM Director's Report describes the activity of the BIPM. In order to carry out its mission of ensuring and promoting the global comparability of measurements, the BIPM operates laboratories in the fields of mass, time, electricity, ionizing radiation and chemistry. All of the laboratory work addresses one or more of the agreed objectives for the BIPM, which are: - To establish and maintain appropriate reference standards for use as the basis of a limited number of key international comparisons at the highest level. - To coordinate international comparisons of national measurement standards through the Consultative Committees of the CIPM; taking the role of coordinating laboratory for selected comparisons of the highest priority and undertaking the scientific work necessary to enable this to be done. - To provide selected calibrations for Member States. In this document some highlights of the work carried out during 2013 are presented. Extended reports of the work of each department are available at http://www.bipm.org/en/publications/directors_report/. This document comprises the Director's report with its supplement describing the work of the Ionizing Radiation Department (X- and γ-rays, Radionuclides, Thermometry)

  18. Reactor Engineering Department annual report

    International Nuclear Information System (INIS)

    1993-09-01

    This report summarizes the research and development activities in the Department of Reactor Engineering during the fiscal year of 1992 (April 1, 1992-March 31, 1993). The major Department's programs promoted in the year are the assessment of the high conversion light water reactor, the design activities of advanced reactor system and development of a high energy proton linear accelerator for the engineering applications including TRU incineration. Other major tasks of the Department are various basic researches on the nuclear data and group constants, the developments of theoretical methods and codes, the reactor physics experiments and their analyses, fusion neutronics, radiation shielding, reactor instrumentation, reactor control/diagnosis, thermohydraulics and technology developments related to the reactor physics facilities. The cooperative works to JAERI's major projects such as the high temperature gas cooled reactor or the fusion reactor and to PNC's fast reactor project were also progressed. The activities of the Research Committee on Reactor Physics are also summarized. (author)

  19. Reactor engineering department annual report

    International Nuclear Information System (INIS)

    1990-09-01

    This report summarizes the research and development activities in the Department of Reactor Engineering during the fiscal year of 1989 (April 1, 1989 - March 31, 1990). One of major Department's programs is the assessment of the high conversion light water reactor and the design activities of advanced reactor system. Development of a high energy proton linear accelerator for the nuclear engineering including is also TRU incineration promoted. Other major tasks of the Department are various basic researches on nuclear data and group constants, theoretical methods and code development, on reactor physics experiments and analyses, fusion neutronics, radiation shielding, reactor instrumentation, reactor control/diagnosis, thermohydraulics, technology assessment of nuclear energy and technology developments related to the reactor physics facilities. The cooperative works to JAERI's major projects such as the high temperature gas cooled reactor or the fusion reactor and to PNC's fast reactor project also progressed. The activities of the Research Committee on Reactor Physics are also summarized. (author)

  20. [Investigation of the burnout syndrome among the employees of the Department of Emergency Medicine at the University of Szeged].

    Science.gov (United States)

    Hompoth, Emőke Adrienn; Töreki, Annamária; Pető, Zoltán

    2018-01-01

    Burnout has been described as a growing problem amongst healthcare workers. Emergency department staffs experience the burden of stress day by day, yet only a few studies have examined their burnout. In this study we wanted to investigate the burnout and its relations to other variables amongst the employees of the Department of Emergency Medicine in Szeged. Cross-sectional design utilizing a self-administered questionnaire was used to collect data from the staff of the Department. Burnout was measured using the Maslach Burnout Inventory. Burnout is considerably prevalent among the workers of the Emergency Department, especially nurses and physicians. The study found negative relation between burnout and age, number of children, number of years in the healthcare system, number of physical symptoms, social support and psychological immune system. Being single was a risk factor. The risks and protective factors found to be associated with burnout in this study might help to set up institutional prevention and intervention strategies. Orv Hetil. 2018; 159(3): 113-118.

  1. Synchrotron radiation linear dichroism (SRLD) investigation of the electronictransitions of quinizarin, chrysazin, and anthrarufin

    DEFF Research Database (Denmark)

    Nguyen, Duy Duc; Jones, Nykola C.; Hoffmann, Søren Vrønning

    2010-01-01

    The electronic transitions of the three , (alpha), (alphaPrime) -dihydroxy derivatives of anthraquinone, 1,4-dihydroxy-, 1,8-dihydroxy-, and 1,5-dihydroxy-9,10-anthraquinone (quinizarin, chrysazin, and anthrarufin), were investigated by synchrotron radiation linear dichroism (SRLD) spectroscopy...... the investigated region (15,000-58,000cm-1), essentially similar wavenumbers, intensities, and transition moment directions were determined for chrysazin and anthrarufin, while the spectrum of quinizarin deviated significantly. The results of time-dependent density functional theory (TD-DFT) calculations were...

  2. The incidence of unstable chromosome aberrations in peripheral blood lymphocytes from occupationally exposed people in Boris Kidric Institute of nuclear sciences (Radiation protection department)

    Energy Technology Data Exchange (ETDEWEB)

    Zunic, Z; Markovic, S; Bajic, V; Milic, O; Radotic, N; Horvat, Dj; Nikolic, M; Lakoski, A [Institute of Nuclear Sciences Boris Kidric, Vinca, Beograd (Serbia and Montenegro)

    1989-07-01

    The results of the chromosome analysis of 17 employees of Radiation protection department of Boris Kidric Institute of Nuclear Sciences were related to the corresponding values of thermoluminescence dosimetry (TLD) measurements within the past eight years. The results obtained show the biological effects (structural chromosome aberrations) of chronic of fractionated exposures, low-level acute doses, even in the cases when the individual cumulative equivalent doses were 10 times lower than the order of maximum permissible occupational exposures (author)

  3. Radiation safety

    International Nuclear Information System (INIS)

    Jain, Priyanka

    2014-01-01

    The use of radiation sources is a privilege; in order to retain the privilege, all persons who use sources of radiation must follow policies and procedures for their safe and legal use. The purpose of this poster is to describe the policies and procedures of the Radiation Protection Program. Specific conditions of radiation safety require the establishment of peer committees to evaluate proposals for the use of radionuclides, the appointment of a radiation safety officer, and the implementation of a radiation safety program. In addition, the University and Medical Centre administrations have determined that the use of radiation producing machines and non-ionizing radiation sources shall be included in the radiation safety program. These Radiation Safety policies are intended to ensure that such use is in accordance with applicable State and Federal regulations and accepted standards as directed towards the protection of health and the minimization of hazard to life or property. It is the policy that all activities involving ionizing radiation or radiation emitting devices be conducted so as to keep hazards from radiation to a minimum. Persons involved in these activities are expected to comply fully with the Canadian Nuclear Safety Act and all it. The risk of prosecution by the Department of Health and Community Services exists if compliance with all applicable legislation is not fulfilled. (author)

  4. An investigation of infection control for x-ray cassettes in a diagnostic imaging department

    Energy Technology Data Exchange (ETDEWEB)

    Fox, Matthew [School of Allied Health Professions and Science, Faculty of Health, Wellbeing and Science, University Campus Suffolk, Rope Walk, Ipswich, Suffolk, IP4 1LT (United Kingdom); Harvey, Jane M. [School of Allied Health Professions and Science, Faculty of Health, Wellbeing and Science, University Campus Suffolk, Rope Walk, Ipswich, Suffolk, IP4 1LT (United Kingdom)], E-mail: j.harvey@ucs.ac.uk

    2008-11-15

    Introduction: This research was conducted to investigate if X-ray cassettes could be a possible source of pathogens capable of causing nosocomial infections, and if they could be a possible vector for cross infection within the hospital environment. Method: The research involved the swabbing of X-ray cassettes in a Diagnostic Imaging Department of a large hospital in the east of England. Two areas of the Diagnostic Imaging Department were included in the study. Research concentrated on X-ray cassettes used for mobile radiography, accident and emergency and inpatient use. Forty cassettes were swabbed in total specifically for general levels of bacterial contamination, also for the presence or absence of methicillin-resistant Staphylococcus aureus (MRSA). A mapping exercise was completed following the location of an X-ray cassette typically used in mobile radiography. The exercise noted the level of direct contact with patient's skin and other possible routes of infection. Results: The results demonstrated that there were large levels of growth of samples taken from cassettes and developed in the Microbiology Department. Coagulase-negative Staphylococcus, Micrococci, Diptheroids and species of Bacillus were all identified. The mapping exercise in which the journey of a 35/43 cm cassette used for mobile radiography was tracked found that contact with patient's skin and potential pathogens or routes of cross infection was a common occurrence whilst undertaking mobile radiography. Conclusion: The research has identified the presence of bacterial contamination on cassettes. The research established that X-ray cassettes/imaging plates are often exposed to pathogens and possible routes of cross infection; also that patient's skin often comes directly in contact with the X-ray cassette/imaging plate. The research also shows that as cassettes/imaging plates are a potential source of cross infection, the Diagnostic Imaging Department may be partly responsible

  5. Investigation of classical radiation reaction with aligned crystals

    Energy Technology Data Exchange (ETDEWEB)

    Di Piazza, A., E-mail: dipiazza@mpi-hd.mpg.de [Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 (Germany); Wistisen, Tobias N.; Uggerhøj, Ulrik I. [Department of Physics and Astronomy, Aarhus University, 8000 Aarhus (Denmark)

    2017-02-10

    Classical radiation reaction is the effect of the electromagnetic field emitted by an accelerated electric charge on the motion of the charge itself. The self-consistent underlying classical equation of motion including radiation–reaction effects, the Landau–Lifshitz equation, has never been tested experimentally, in spite of the first theoretical treatments of radiation reaction having been developed more than a century ago. Here we show that classical radiation reaction effects, in particular those due to the near electromagnetic field, as predicted by the Landau–Lifshitz equation, can be measured in principle using presently available facilities, in the energy emission spectrum of 30-GeV electrons crossing a 0.55-mm thick diamond crystal in the axial channeling regime. Our theoretical results indicate the feasibility of the suggested setup, e.g., at the CERN Secondary Beam Areas (SBA) beamlines.

  6. Regional and national radiation protection activities in Egypt

    International Nuclear Information System (INIS)

    Gomaa, M.A.M.

    2008-01-01

    Radiation protection activities in Egypt go back to 1957 where the Egyptian Atomic Energy Commission (EAEC) Law was issued. Radiation protection and civil defense department was one of EAEC eighth departments. Ionizing radiation law was issued in 1960 and its executive regulation in 1962. The main aim of the present work is to through some light on the current radiation protection activities in Egypt. This includes not only the role of governmental organizations but also to the non governmental organizations. Currently a new Nuclear Safety law is understudy. Regional activities such as holding the second all African IRPA regional radiation protection congress which was held in April 2007 and national training and workshops are held regularly through EAEA, AAEA and MERRCAC. (author)

  7. Department of Cosmic Radiation Physics: Overview

    International Nuclear Information System (INIS)

    Szabelski, J.

    2000-01-01

    Full text: Department of Cosmic Ray Physics in Lodz is involved in basic research in the area of high-energy physics and cosmic ray physics related to: -Studies of asymptotic properties of hadronic interactions based on the analysis of cosmic ray propagation through the atmosphere. -Experimental and phenomenological studies of Extensive Air Showers induced by cosmic ray particles. - Search for high-energy cosmic ray point sources. - Studies of cosmic ray propagation in the Galaxy and particle acceleration mechanisms. -Studies of mass composition of cosmic rays in the energy range 10 15 -10 17 eV. Theoretical and experimental studies of Extensive Air Shower properties are performed mainly on the basis of the results obtained by the Lodz Extensive Air Shower Array. We have analysed nearly 100,000 events of energies above 10 15 eV registered in the Lodz hodoscope. We have developed a method to verify different models of cosmic ray mass composition. The Lodz group collaborates with many foreign institutes and laboratories in construction and data interpretation of cosmic ray experiments. Our most important partners are: Forschungszentrum in Karlsruhe (Germany), College de France, Institute for Nuclear Studies of the Russian Academy of Sciences and Uppsala University (Sweden). (author)

  8. Radiative heat transfer in low-dimensional systems -- microscopic mode

    Science.gov (United States)

    Woods, Lilia; Phan, Anh; Drosdoff, David

    2013-03-01

    Radiative heat transfer between objects can increase dramatically at sub-wavelength scales. Exploring ways to modulate such transport between nano-systems is a key issue from fundamental and applied points of view. We advance the theoretical understanding of radiative heat transfer between nano-objects by introducing a microscopic model, which takes into account the individual atoms and their atomic polarizabilities. This approach is especially useful to investigate nano-objects with various geometries and give a detailed description of the heat transfer distribution. We employ this model to study the heat exchange in graphene nanoribbon/substrate systems. Our results for the distance separations, substrates, and presence of extended or localized defects enable making predictions for tailoring the radiative heat transfer at the nanoscale. Financial support from the Department of Energy under Contract No. DE-FG02-06ER46297 is acknowledged.

  9. Radiation exposure of workers in nuclear medicine

    International Nuclear Information System (INIS)

    Bujnova, A.

    2008-01-01

    Nuclear medicine is an interdisciplinary department that deals with diagnosis and therapy using open sources. Therefore workers in nuclear medicine are in daily contact with ionizing radiation and thus it is essential to monitor a radiation load. Each work must therefore carry out monitoring of workers. It monitors compliance with the radiation limits set by law, allows an early detection of deviations from normal operation and to demonstrate whether the radiation protection at the workplace is optimized. This work describes the principles of monitoring of workers in nuclear medicine and monitoring methods for personal dosimetry. In the next section the author specifically deals with personal dosimetry at the Department of Nuclear Medicine St. Elizabeth Cancer Institute, Bratislava (KNM-Ba-OUSA). The main part of the work is to evaluate the results of a one-year monitoring of radiation workers KNM-Ba-OUSA. (author)

  10. Exposure of ionizing radiation to non-radiation workers from nuclear medicine patients

    International Nuclear Information System (INIS)

    Janssen, J.; Smart, R.C.; McKay, E.

    1999-01-01

    Full text: Occasionally, patients are required to have several tests in one day. They may be injected with radio-isotopes in the morning, have other investigations during the absorption period and then return to nuclear medicine for imaging later in the day. Recently, the NSW Department of Health issued a circular concerning exposure to sonographers from ionizing radiation emitted from nuclear medicine patients. The object of this study is to establish a model of emissions from nuclear medicine patients and to measure the exposure to other health workers who may be in close contact with these patients. Dose rate measurements were acquired for patients injected with 99 Tc m and 67 Ga for the following studies: heart, thyroid, lung, bone, biliary and lymphoma. Measurements were taken at 10 cm increments to 1 m and at time intervals of 0,1,2 and 24 h post-injection. In addition, 5 sonographers were issued with TLDs to be worn on the waist and fingers for a period of 3 months. The dose limit for a non-radiation worker is 1000 μSv (ICRP 60). The external dose rate measurements indicate that, assuming a sonographer is seated approximately 30 cm from a patient injected with 800 MBq 99 Tc m -HDP for a bone scan, 1 h post-injection, the sonographer would receive a dose of 11 μSv for a 30 min ultrasound scan. In practice, only 4 nuclear medicine patients were scanned in the ultrasound department during the 5 week monitoring period and the sonographers' TLDs recorded no radiation dose. In conclusion, the average exposure to sonographers from nuclear medicine patients is well within the limits recommended by the ICRP. However, in accordance with the ALARA principle where practicable, any ultrasound examination should be performed prior to nuclear medicine studies

  11. Planning guide for radiologic installations. fascicle 1 -- radiation therapy installations

    International Nuclear Information System (INIS)

    Tuddenham, W.J.

    1976-01-01

    Five articles dealing with the development and operation of radiation therapy facilities present recommendations for the design of various types of radiation therapy facilities, including the university center, the free-standing private oncology center, and the community hospital radiation therapy department. Different concepts of department design are represented. In one article, the planning room is conceived to be the central feature of a facility; in another article, radiation therapy is designed around examination rooms. Shielding requirements are also discussed, as are the advantages and space and licensing requirements of various types of equipment. There is a need for planning appropriate computer facilities in conjunction with other equipment plans, and a critique of one radiation therapy unit is provided. The concept of a regional network for the delivery of radiation therapy services is then explored. The volume contains extensive illustrations in the form of floor plans, drawings, figures, and tables. Many of the articles include a bibliography. This is the first in a series of publications on radiation department design which will be useful to architects, engineers, and hospital planners

  12. A history of presatellite investigations of the earth's radiation budget

    Science.gov (United States)

    Hunt, G. E.; Kandel, R.; Mecherikunnel, A. T.

    1986-01-01

    The history of radiation budget studies from the early twentieth century to the advent of the space age is reviewed. By the beginning of the 1960's, accurate radiative models had been developed capable of estimating the global and zonally averaged components of the radiation budget, though great uncertainty in the derived parameters existed due to inaccuracy of the data describing the physical parameters used in the model, associated with clouds, the solar radiation, and the gaseous atmospheric absorbers. Over the century, the planetary albedo estimates had reduced from 89 to 30 percent.

  13. 'Radiation Fair' for 15 years in Osaka, Japan, and survey of the participants attitude toward radiation

    Energy Technology Data Exchange (ETDEWEB)

    Furuta, Masakazu; Asano, Takeyoshi; Hayashi, Toshio; Hosokawa, Yasushi [Research Institute for Advanced Science and Technology, Osaka Prefecture Univ., Sakai, Osaka (Japan); Kakefu, Tomohisa; Nishihara, Hideaki

    1999-09-01

    We have been successfully operating 'Radiation Fair--The relationship between daily life and radiation--' during summer vacation season in August every year for 15 years in Osaka, the largest city of western Japan. The purpose of this event is radiation education of public including school kids through efficient information transfer of radiation and radiation-related technology. Currently we set up the space of it on a floor of Kintetsu Department Store, one of the major department stores in downtown Osaka and display various irradiated products available in our daily life together with explanatory panels. We have been devising various attractions as efficient information transfer media so that even elementary-school kids understand the basic knowledge of radiation and irradiation technologies. The number of participants has increased year by year until more than 20,000 in recent years. We distributed questionnaires to the visitors for recent 3 years to inquire their status toward radiation and irradiated products as well as impression toward the displays. The survey results suggest that school education may contribute to establish the public image toward 'radiation' as well as mass media. (author)

  14. Numerical investigation of the inverse blackbody radiation problem

    International Nuclear Information System (INIS)

    Xin Tan, Guo-zhen Yang, Ben-yuan Gu

    1994-01-01

    A numerical algorithm for the inverse blackbody radiation problem, which is the determination of the temperature distribution of a thermal radiator (TDTR) from its total radiated power spectrum (TRPS), is presented, based on the general theory of amplitude-phase retrieval. With application of this new algorithm, the ill-posed nature of the Fredholm equation of the first kind can be largely overcome and a convergent solution to high accuracy can be obtained. By incorporation of the hybrid input-output algorithm into our algorithm, the convergent process can be substantially expedited and the stagnation problem of the solution can be averted. From model calculations it is found that the new algorithm can also provide a robust reconstruction of the TDTR from the noise-corrupted data of the TRPS. Therefore the new algorithm may offer a useful approach to solving the ill-posed inverse problem. 18 refs., 9 figs

  15. Does size matter? An investigation of how department size and other organizational variables influence on publication productivity and citation impact

    Energy Technology Data Exchange (ETDEWEB)

    Aksnes, D.W.; Rørstad, K.; Piro, F.N.

    2016-07-01

    In this study, we investigate whether university department size is important in determining publication productivity and citation impact. Drawing on a unique dataset containing a variety of different variables at department levels, we are able to provide a richer picture of the research performance than what typically has been the case in many previous studies. In addition to analyzing the basic question of how size relates to scientific performance, we address whether the funding profile of the departments plays a role, whether the scientific performance is influenced by the composition of the academic personnel (in terms of gender, academic positions, recruiting personnel and the share of doctoral degree holders). The study shows that virtually no size effect can be identified and highly productive and highly cited units are found among both small, medium and large departments. For none of the organizational variables we are able to identify statistically significant relationships in respect to research performance at an overall level. We conclude that the productivity and citation differences at the level of departments cannot generally be explained by the selected variables for department size, funding structure and the composition of scientific personnel. (Author)

  16. Investigation of the relationship between knowledge concerning radiation and the level of anxiety toward radiation in student nurses

    International Nuclear Information System (INIS)

    Kunugita, Naoki

    2008-01-01

    In the medical fields, the use of radiation is indispensable in diagnosis, radiotherapy, nuclear medicine and various other areas. On the other hand, great anxiety is often felt due to the misunderstanding of radiation, and this anxiety is seen in not only patients but also nurses. In this study, a questionnaire survey about knowledge of radiation and the level of anxiety was carried out in student nurses for three years from 2005 to 2007. The questionnaire included the level of anxiety about radiation and 12 basic question items concerning radiation. The results showed that the student with poor knowledge about radiation showed high anxiety. After a series of lectures concerning radiation, the acquisition of knowledge and a decrease in anxiety were observed in the students. However, it was still shown that people with scarce knowledge concerning radiation still had high anxiety at the end of the lectures. In conclusion, it was shown that education about radiation is necessary to decrease anxiety about radiation among nurses in medical care. (author)

  17. Department of Nuclear Safety Research and Nuclear Facilities annual report 1995

    Energy Technology Data Exchange (ETDEWEB)

    Majborn, B.; Brodersen, K.; Damkjaer, A.; Floto, H.; Jacobsen, U.; Oelgaard, P.L. [eds.

    1996-03-01

    The report presents a summary of the work of the Department of Nuclear Safety Research and Nuclear Facilities in 1995. The department`s research and development activities are organized in three research programmes: Radiation Protection, Reactor Safety, and Radioanalytical Chemistry. The nuclear facilities operated by the department include the Research Reactor DR3, the Isotope Laboratory, the Waste Treatment Plant, and the Educational Reactor DR1. Lists of staff and publications are included together with a summary of the staff`s participation in national and international committees. (au) 5 tabs., 21 ills.

  18. Practicing radiation oncology in the current health care environment - Part III: Information systems for radiation oncology practice

    International Nuclear Information System (INIS)

    Kijewski, Peter

    1996-01-01

    Purpose: This course will review topics to be considered when defining an information systems plan for a department of radiation oncology. A survey of available systems will be presented. Computer information systems can play an important role in the effective administration and operation of a department of radiation oncology. Tasks such as 1) scheduling for physicians, patients, and rooms, 2) charge collection and billing, 3) administrative reporting, and 4) treatment verification can be carried out efficiently with the assistance of computer systems. Operating a department without a state of art computer system will become increasingly difficult as hospitals and healthcare buyers increasingly rely on computer information technology. Communication of the radiation oncology system with outside systems will thus further enhance the utility of the computer system. The steps for the selection and installation of an information system will be discussed: 1) defining the objectives, 2) selecting a suitable system, 3) determining costs, 4) setting up maintenance contracts, and 5) planning for future upgrades

  19. Patterns of Recent National Institutes of Health (NIH) Funding to Diagnostic Radiology Departments: Analysis Using the NIH RePORTER System.

    Science.gov (United States)

    Franceschi, Ana M; Rosenkrantz, Andrew B

    2017-09-01

    This study aimed to characterize recent National Institutes of Health (NIH) funding for diagnostic radiology departments at US medical schools. This retrospective study did not use private identifiable information and thus did not constitute human subjects research. The public NIH Research Portfolio Online Reporting Tools Expenditure and Results system was used to extract information regarding 887 NIH awards in 2015 to departments of "Radiation-Diagnostic/Oncology." Internet searches were conducted to identify each primary investigator (PI)'s university web page, which was used to identify the PI's departmental affiliation, gender, degree, and academic rank. A total of 649 awards to diagnostic radiology departments, based on these web searches, were included; awards to radiation oncology departments were excluded. Characteristics were summarized descriptively. A total of 61 unique institutions received awards. The top five funded institutions represented 33.6% of all funding. The most common institutes administering these awards were the National Cancer Institute (29.0%) and the National Institute of Biomedical Imaging and Bioengineering (21.6%). Women received 15.9% of awards and 13.3% of funding, with average funding per award of $353,512 compared to $434,572 for men. PhDs received 77.7% of all awards, with average funding per award of $457,413 compared to $505,516 for MDs. Full professors received 51.2% of awards (average funding per award of $532,668), compared to assistant professors who received 18.4% of awards ($260,177). Average funding was $499,859 for multiple-PI awards vs. $397,932 for single-PI awards. Common spending categories included "neurosciences," "cancer," "prevention," and "aging." NIH funding for diagnostic radiology departments has largely been awarded to senior-ranking male PhD investigators, commonly at large major academic medical centers. Initiatives are warranted to address such disparities and promote greater diversity in NIH funding

  20. Report of investigation on the radiation leak of the atomic powered ship 'Mutsu'

    International Nuclear Information System (INIS)

    1975-01-01

    Radiation leak of the atomic powered ship Mutsu was investigated. The radiation leak from the reactor shield was caused at the time of the test run, and serious social and political problem was raised. The phenomena is the streaming of neutron and caused by the technical lack of designing. There were, however, many cause of this technical lack. The organization for construction of the ship Mutsu was politically incomplete, the system of the organization was changed frequently, and then it was very hard to call together qualified engineers. Check of the design and the mock-up test were incomplete, and improvements of design in the course of construction was not made. Responsibilities of the persons in charge were not clear. Contract concerning the shield was defective. This report proposes improvement on the above mentioned problem. (Kato, T.)

  1. Utilization of a photon transport code to investigate radiation therapy treatment planning quantities and techniques

    International Nuclear Information System (INIS)

    Palta, J.R.

    1981-01-01

    A versatile computer program MORSE, based on neutron and photon transport theory has been utilzed to investigate radiation therapy treatment planning quantities and techniques. A multi-energy group representation of transport equation provides a concise approach in utilizing Monte Carlo numerical techniques to multiple radiation therapy treatment planning problems. Central axis total and scattered dose distributions for homogeneous and inhomogeneous water phantoms are calculated and the correction factor for lung and bone inhomogeneities are also evaluated. Results show that Monte Carlo calculations based on multi-energy group tansport theory predict the depth dose distributions that are in good agreement with available experimental data. Central axis depth dose distributions for a bremsstrahlung spectrum from a linear accelerator is also calculated to exhibit the versatility of the computer program in handling multiple radiation therapy problems. A novel approach is undertaken to study the dosimetric properties of brachytherapy sources

  2. Pathological investigation of radiation necrosis

    International Nuclear Information System (INIS)

    Nakamura, Nishio; Yoshimura, Noriaki; Ikuta, Fusahiro

    1975-01-01

    The brain and spinal cord of an 18-year-old male, who suffered from cerebellar medulloblastoma with subarachnoid spread, had been irradiated by a large amount of Linac X-ray: 14,450 rads to the lower thoracic segments and 7,400 rads to the lumbar segments. The tumor at the roof of the 4th ventricle had disseminated along the ventricular system but was limited to the subarachnoid space of the cervical spinal cord. No remarkable changes were found in the volume or consistency of the thoracic and lumbar cord. Elasticity of the lower thoracic segment was greatly diminished and the cut surfaces were yellowish white and fragile. Microscopically extensive coagulation necrosis was observed with complete disintegration of myelin and axon. Vascular changes were most prominent in the smaller vessels, eg. hyalinous thickening, concentric cleavage, adventitial fibrosis and edema of small artery perivascular spaces, fibrin thrombi occulusion of arterioles and capillaries, and telangiectasia. In the lumbar spinal cord, moderate neuronal degeneration and protoplasmic astrocytosis were observed. Changes in the lumbar posterior white column were considered to be not only secondary degeneration but also a primary lesion caused by irradiation. Liquefactive necrosis in the gray matter of the cervical cord was thought to be a nonspecific circulatory disturbance because of the absence of vascular changes. Vascular changes were thought to be very important in the histological diagnosis of radiation myelopathy and it was supposed that increased permeability of the vessel walls was a factor in coagulation necrosis. They considered this case to have typical histology of radiation myelopathy. (Evans, J.)

  3. WIPP radiation dosimetry program

    International Nuclear Information System (INIS)

    Wu, C.F.

    1991-01-01

    Radiation dosimetry is the process by which various measurement results and procedures are applied to quantify the radiation exposure of an individual. Accurate and precise determination of radiation dose is a key factor to the success of a radiation protection program. The Waste Isolation Pilot Plant (WIPP), a Department of Energy (DOE) facility designed for permanent repository of transuranic wastes in a 2000-foot-thick salt bed 2150 feet underground, has established a dosimetry program developed to meet the requirements of DOE Order 5480.11, ''Radiation Protection for Occupational Workers''; ANSI/ASME NQA-1, ''Quality Assurance Program Requirements for Nuclear Facilities''; DOE Order 5484.1, ''Environmental Protection, Safety, and Health Protection Information Reporting Requirements''; and other applicable regulations

  4. Department of Cosmic Radiation Physics: Overview

    International Nuclear Information System (INIS)

    Gawin, J.

    1999-01-01

    Full text: The Department of Cosmic Ray Physics in Lodz is involved in basic research in the area of high energy physics and cosmic ray physics related to: - Studies of asymptotic properties of hadronic interactions based on the analysis of cosmic ray propagation in the atmosphere. - Experimental and phenomenological studies of Extensive Air Showers induced by cosmic ray particles. - Search for point sources of high energy cosmic rays. - Studies of cosmic ray propagation in the Galaxy and mechanisms of particle acceleration. - Studies of mass composition of cosmic rays in the energy range 10 15 - 10 17 eV. Theoretical and experimental studies of Extensive Air Shower properties are performed mostly based on the results obtained by the Lodz Extensive Air Shower Array. We analysed nearly 100,000 events of energies above 10 15 eV registered by the Lodz hodoscope. We have developed the method of data analysis which allows us to verify different models of cosmic ray mass composition. In our research in high energy cosmic rays we also used experimental data from other collaborating experiments in Karlsruhe, Baksan and THEMISTOCLE. The Lodz group collaborates with many foreign institutes and laboratories in construction and data interpretation of cosmic ray experiments. Our most important partners are: Forschungszentrum in Karlsruhe (Germany), College de France, Institute for Nuclear Studies of the Russian Academy of Science, University of Perpignan and Uppsala University (Sweden). (author)

  5. Department of Cosmic Radiation Physics - Overview

    International Nuclear Information System (INIS)

    Gawin, J.

    1997-01-01

    Full text: The Department of Cosmic Ray Physics in Lodz is involved in basic research in the area of high energy physics and cosmic ray physics related to: -Studies of the asymptotic properties of hadronic interactions from the analysis of cosmic ray propagation in the atmosphere. -Studies of structure and properties of Extensive Air Showers induced by cosmic ray particles. -Search for point sources of high energy cosmic rays. -Studies of cosmic ray propagation in the Galaxy and mechanisms of particle acceleration. -Studies of the mass composition of cosmic rays in the energy range 10 15 -10 17 eV. Theoretical and experimental studies of nuclear interactions for energies exceeding those obtained by modern particle accelerators are performed employing results obtained by the Lodz Extensive Air Shower Array. The Lodz hodoscope can register electromagnetic components of cosmic ray showers in the atmosphere as well as muons at two energy thresholds. Data collected by the Lodz array are also used to study mass composition of cosmic rays in the energy range 10 15 - 10 17 eV. The Lodz group collaborates with foreign institutes and laboratories on construction and data interpretation of cosmic ray experiments. Our most important partners are: Forschungszentrum Karlsruhe (Germany), College de France, the Institute for Nuclear Studies of the Russian Academy of Sciences, the University of Durham, and the University of Perpignan. (author)

  6. Radiation Protection: introduction

    International Nuclear Information System (INIS)

    Loos, M.

    2005-01-01

    The abstract gives an overview and introduction to the activities of SCK-CEN's Radiation Protection department. Main strategic developments and achievements in the field of life sciences, policy supports and medical applications are summarised

  7. Cytogenetic investigation in a population living in the high background radiation area in China

    Energy Technology Data Exchange (ETDEWEB)

    Deqing, C.

    1980-04-01

    On the basis of the previous investigation, 24,000 metaphases of the lymphocytes of 120 inhabitants from Tongyou region, where the highest individual cummulative exposure per year of 372 mR in weighted average was recorded in the high background radiation area selected, have been analysed with the method recommended by WHO in 1973, in order to determine the extent of human chromosome aberrations induced by the high background radiation of various levels. The results show that the difference between the total number of chromosome breakages in the individuals living in the high background radiation area and that in the control area (0.32x10/sup -2/ and 0.27x10/sup -2/ per cell respectively) is not significant whereas that between the numbers of two-hite aberrations (mainly dicentric) in the same two groups (0.042x10/sup -2/ and 0.0048x10/sup -2/ per cell) is significant (X/sup 2/ = 6.1475, P<0.05). In addition, the normal value of the chromosome aberrations of human lymphocytes was analyzed.

  8. Annual report of department of research reactor, 1992

    International Nuclear Information System (INIS)

    1993-12-01

    The department of research Reactor is responsible for the operation, maintenance, utilization and related R and D works of the research reactors including JRR-2, JRR-3M (new JRR-3) and JRR-4. This report describes the activities of our department in fiscal year of 1992 and it also includes some of the technical topics on the works mentioned above. As for the research reactors, we carried out the operation, maintenance, irradiation utilization, neutron beam experiments, technical management including fuels and water chemistry, radiation monitoring as well as related R and D works. The international cooperations between the developing countries and our department were also made concerning the operation, utilization and safety analysis for nuclear facilities. (author)

  9. Investigation and analysis of etiology of down's syndrome in children of high background radiation area

    International Nuclear Information System (INIS)

    Zha Yongru

    1985-01-01

    In order to find out what caused the differences in incidences of Down's syndrome between the children in high background radiation area and those in control area, investigation and analysis were carried ou in 5 aspects based on the original data and the information from the previous survey. These are: the incidences of congenital malformations in normal areas, the age distribution of children examined, the maternal age, the dates of birth of afflicted children, and the radiation exposure of mothers. The results suggested that the higher incidence of Down's syndrome in high background area might be related to the materal age. Further studies are needed to arrive at a conclusion

  10. Trends of the effective dose distribution of occupational exposures in medical and research departments for KIRAMS in Republic of Korea

    International Nuclear Information System (INIS)

    Park, M.; Kim, G. S.; Ji, Y. H.; Jung, M. S.; Kim, K. B.; Jung, H.

    2014-01-01

    This work proposes the basic reference data of occupational dose management and statistical dose distribution with the classification of radiation work groups though analysis of occupational dose distribution. Data on occupational radiation exposure from medical and scientific usage of radiation in Korea Institute of Radiological and Medical Sciences for the years 2002-11 are presented and evaluated with the characteristic tendency of radiation working groups. The results of occupational radiation exposure were measured by personal dosemeters. The monitored occupational exposure dose data were evaluated according to the average effective dose and collective dose. The most annual average effective dose for all occupational radiation workers was under 1 mSv. Considering the dose distribution of each department, most overexposure workers worked in radiopharmaceutical product facilities, nuclear medicine department and radiation oncology department. In addition, no monitored workers were found to have received an occupational exposure over 50 mSv in single year or 100 mSv in this period. Although the trend of occupational exposure was controlled <1 mSv after 2007 and the radiation protection status was sufficient, it was consistently necessary to optimise and reduce the occupational radiation exposure. (authors)

  11. Investigation of radiation exposure dosage in dental and panoramic radiography

    International Nuclear Information System (INIS)

    Ishii, Kenichi

    2005-01-01

    Dental radiography and a 10-sheet procedure were conducted at 10 sites in the maxillomandibular anterior teeth and at both sides of the premolar and molar teeth sections with and without a protective apron (total 22 patterns). Experiments, which included a total of five patterns, involving standard ortho-radiography were performed with and without a protective apron, positioning of an apron exclusively on the anterior or the posterior portion of the body and utility of an apron that covered the entire body. Results are as follows: In dental radiography, internal organs included in a bundle demonstrated high radiation exposure, whereas organs excluded from the bundle exhibited low radiation exposure. In organs situated below the thyroid gland, utilization of aprons resulted in lower radiation exposure. In ortho-radiography, radiation exposure was greatest in the parotid gland, followed by the mandibular, sublingual and thyroid glands, respectively. The protective apron resulted in lower radiation exposure at sites situated below the mammary glands; moreover, a protector covering the entire body led to lower radiation exposure in comparison to an apron worn exclusively on the anterior or the posterior aspect of the body. No significant difference was observed in terms of exposure between protective aprons worn on the anterior or the posterior aspect of the body. Furthermore, a protective collar resulted in nearly zero radiation exposure in the thyroid gland. However, a protective collar largely interferes with interpretation of the radiograph; thus, in order to produce interpretable radiographs, protection of the thyroid gland is not possible. In conclusion, radiation exposure dosage can be reduced via utilization of a protective apron positioned below the thyroid gland during dental radiography and below the mammary glands during ortho-radiography. We confirmed evidence indicating that application of a protective apron can reduce patient radiation exposure dosage

  12. New organizational framework of the radiation protection in the Czech Republic

    International Nuclear Information System (INIS)

    Klener, V.

    1996-01-01

    The first administrative acts concerning Radiation Protection were issued on the territory of today's Czech Republic already in the times when it was part of the then Austro-Hungarian Empire. They delt with the regulation of the medical application of radon waters and radioactive mud used in spas. Between the World War I and the World War II the activities related to Radiation Protection covered only some particular facets of the challenge. Two outstanding personalities contributing to the progress in this field are worth mentioning. Prof. Teisinger, founder of occupational medicine in Czechoslovakia with high reputation also in the then Yugoslavia, started to follow-up the health status in radiation workers and strongly supported the idea of personnel monitoring. Prof. Frantisek Behounek - physicist and well known participant of the general Nobile's expedition to the North Pole - performed investigations in dosimetric methods and started to study the radon problems in uranium mines. A systematic approach to Radiation Protection has been adopted from the early nineteen-fifties. In 1956 the Department of Radiation Hygiene was established within the Institute of Industrial Hygiene and Occupational Diseases, headed by Prof. Teisinger. The staff of this Department increased during years from 30 to almost a hundred, and finally, in 1965 an autonomous Research Institute of Radiation Hygiene was created. New tasks related to Radiation Protection arose also at the regional level and not all of them could be handled from this central establishment. Following the model of the Soviet Hygiene Service the Czechoslovak Ministry of Public Health set up in 1957 a network of Stations of Hygiene and Epidemiology in the country. At the level of Regions - the higher level of administrative areas that time - the groups for Radiation Protection were formed to conduct the daily work at workplaces and in their environment

  13. The advantages of digital radiography in department of radiology

    International Nuclear Information System (INIS)

    Mao Lijuan; Luo Xiaomei; Wu Tengfang

    2009-01-01

    Objective: To investigate the advantages of digital radiography in department of radiology by comparing digital radiography with common radiography. Methods: Test card was used for testing the spatial resolution of DR and common radiography. 1000 films of chest by DR and 1000 films of chest by common radiography were compared in image quality, dose of radiation, the rate of waste film, and the advantages of DR was analyzed. Results: Compared to common radiography, DR had a high sensitivity, high DQE (quantum detection efficiency), high spatial resolution and density resolution. The speed of acquisition and X-ray conversion efficiency were fast. The function of post-processing was strong and the rate of disease detection was high. Conclusion: DR is better than common radiography in all respects, it will be widely applied. (authors)

  14. Empirical investigation on modeling solar radiation series with ARMA–GARCH models

    International Nuclear Information System (INIS)

    Sun, Huaiwei; Yan, Dong; Zhao, Na; Zhou, Jianzhong

    2015-01-01

    Highlights: • Apply 6 ARMA–GARCH(-M) models to model and forecast solar radiation. • The ARMA–GARCH(-M) models produce more accurate radiation forecasting than conventional methods. • Show that ARMA–GARCH-M models are more effective for forecasting solar radiation mean and volatility. • The ARMA–EGARCH-M is robust and the ARMA–sGARCH-M is very competitive. - Abstract: Simulation of radiation is one of the most important issues in solar utilization. Time series models are useful tools in the estimation and forecasting of solar radiation series and their changes. In this paper, the effectiveness of autoregressive moving average (ARMA) models with various generalized autoregressive conditional heteroskedasticity (GARCH) processes, namely ARMA–GARCH models are evaluated for their effectiveness in radiation series. Six different GARCH approaches, which contain three different ARMA–GARCH models and corresponded GARCH in mean (ARMA–GARCH-M) models, are applied in radiation data sets from two representative climate stations in China. Multiple evaluation metrics of modeling sufficiency are used for evaluating the performances of models. The results show that the ARMA–GARCH(-M) models are effective in radiation series estimation. Both in fitting and prediction of radiation series, the ARMA–GARCH(-M) models show better modeling sufficiency than traditional models, while ARMA–EGARCH-M models are robustness in two sites and the ARMA–sGARCH-M models appear very competitive. Comparisons of statistical diagnostics and model performance clearly show that the ARMA–GARCH-M models make the mean radiation equations become more sufficient. It is recommended the ARMA–GARCH(-M) models to be the preferred method to use in the modeling of solar radiation series

  15. Progress report 1983-1984 Reactor Chemistry Department

    International Nuclear Information System (INIS)

    1985-11-01

    Description of the activity developed by the Reactor Chemistry Department of the National Atomic Energy Commission during the period 1983-1984 in its four divisions: Chemical Control; Moderator and Refrigerant Chemistry; Radiation Chemistry and Nuclear Power Plant's Service. A list of the publications made by the personnel during this period is also included. (M.E.L.) [es

  16. Radiation therapy facilities in the United States

    International Nuclear Information System (INIS)

    Ballas, Leslie K.; Elkin, Elena B.; Schrag, Deborah; Minsky, Bruce D.; Bach, Peter B.

    2006-01-01

    Purpose: About half of all cancer patients in the United States receive radiation therapy as a part of their cancer treatment. Little is known, however, about the facilities that currently deliver external beam radiation. Our goal was to construct a comprehensive database of all radiation therapy facilities in the United States that can be used for future health services research in radiation oncology. Methods and Materials: From each state's health department we obtained a list of all facilities that have a linear accelerator or provide radiation therapy. We merged these state lists with information from the American Hospital Association (AHA), as well as 2 organizations that audit the accuracy of radiation machines: the Radiologic Physics Center (RPC) and Radiation Dosimetry Services (RDS). The comprehensive database included all unique facilities listed in 1 or more of the 4 sources. Results: We identified 2,246 radiation therapy facilities operating in the United States as of 2004-2005. Of these, 448 (20%) facilities were identified through state health department records alone and were not listed in any other data source. Conclusions: Determining the location of the 2,246 radiation facilities in the United States is a first step in providing important information to radiation oncologists and policymakers concerned with access to radiation therapy services, the distribution of health care resources, and the quality of cancer care

  17. Department of Training and Consulting: Overview

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    2003-01-01

    Full text: The Department of Training and Consulting is a training centre for high-school students and their teachers, for students of physics and natural sciences in general, last but not least for society broadly understood, including professionals dealing with nuclear radiation. In 2002 the Department was visited by about 5000 high-school students who could listen to the lectures, and take part in experimental demonstrations on ionising radiation, its role in everyday life, technical and medical applications. In addition, the Department led the radiation protection course for the accelerators' operators employed by the Institute for Nuclear Studies. One-day courses on physics of radiation were also arranged for teachers. The Laboratory of Atomic and Nuclear Physics for Schools is still developing. The Laboratory permits high-school students to make simple experiments of qualitative and quantitative character. Its main purpose is to teach the elements of experimental work. In addition, university students of physics can conduct quite complicated experiments. Indeed, the Laboratory is also used for this purpose. The actual list of experiments available to students includes: the behaviour of charged particles in electric and magnetic fields, excitation and properties of photoluminescence, production and properties of X-rays, wave-particle duality, properties of alpha, beta and gamma radiation, elements of gamma spectroscopy including identification of elements by means of induced X-ray fluorescence. The first experience gathered recently is positive although there is still some work to do in order to make the Laboratory more educational. In particular, one of the conclusions drawn from our meetings at the instruments is that although high-school students can follow instructions and understand briefly the physical processes, they are not prepared for reporting the results of the observations or experiments. It is clear that we have to help them in overcoming this

  18. Information technologies for radiation oncology

    International Nuclear Information System (INIS)

    Chen, George T.Y.

    1996-01-01

    Electronic exchange of information is profoundly altering the ways in which we share clinical information on patients, our research mission, and the ways we teach. The three panelists each describe their experiences in information exchange. Dr. Michael Vannier is Professor of Radiology at the Mallinkrodt Institute of Radiology, and directs the image processing laboratory. He will provide insights into how radiologists have used the Internet in their specialty. Dr. Joel Goldwein, Associate Professor in the Department of Radiation Oncology at the University of Pennsylvania, will describe his experiences in using the World Wide Web in the practice of academic radiation oncology and the award winning Oncolink Web Site. Dr. Timothy Fox Assistant, Professor of Radiation Oncology at Emory University will discuss wide area networking of multi-site departments, to coordinate center wide clinical, research and teaching activities

  19. The pregnancy question: a survey regarding the establishment of whether females of childbearing age are or may be pregnant prior to radiation exposures in diagnostic radiology and nuclear medicine departments in the UK

    International Nuclear Information System (INIS)

    Lewis, C.; Arscott, T.

    2008-01-01

    Full text: In the UK, the Ionising Radiation (Medical Exposure) Regulations 2000 state that 'the written procedure for medical exposures shall include...procedures for making enquiries of females of childbearing age to establish whether the individual is or may be pregnant...'. Despite the importance of this question and the potential for causing great distress and anxiety if an examination involving ionising radiation is performed on a pregnant patient, the guidance available is vague and there is no universally accepted procedure on when and how to ask this difficult question. Anecdotal evidence suggests that the procedure for enquiring about possible pregnancy varies from department to department. To investigate this further, we devised a questionnaire to send out to diagnostic radiology and nuclear medicine departments across the UK. Questions asked related to the department's written procedure, the examinations for which the question would be asked, the age of women asked and the recording of whether the question was asked and the outcome. Responses were received from over 300 individuals from 66 different hospitals. The majority (73.5%) were from X-ray departments, 14.0% were from nuclear medicine and the remaining 12.5% included computed tomography, neuroradiology, angiography and cardiac catheter labs. 97.0% have a written procedure, 1.2% do not, 0.9% do not know and 0.9% gave no response. Of the responses from X-ray departments, 17% ask the question for all examinations, while 83% ask for examinations of specific body regions. Several body regions were stated and were divided into 9 categories with the main one being diaphragm to knees (45%). Nuclear medicine departments ask for all examinations. With regard to establishing the 'childbearing age', 5% state that for younger and older patients they ascertain whether the female has started/stopped menstruation before asking the pregnancy question (no age range given), and 95% state an age range of the females

  20. A systems approach to the management of radiation accidents

    International Nuclear Information System (INIS)

    Richter, L.L.; Berk, H.W.; Teates, C.D.; Larkham, N.E.; Friesen, E.J.; Edlich, R.F.

    1980-01-01

    Management of radiation accident patients should have a multidisciplinary approach that includes all health professionals as well as members of public safety agencies. Emergency plans for radiation accidents include detection of the ionizing radiation, patient evacuation, resuscitation, and decontamination. The resuscitated patient should be transported to a radiation control area located outside but adjacent to the emergency department. Ideally this area is accessed through an entrance separate from that used for the main flow of daily emergency department patients. The hospital staff, provided with protective clothing, dosimeters, and preprinted guidelines, continues the resuscitation and definitive care of the patient. This system approach to the management of radiation accidents may be tailored to meet the specific needs of other emergency medical systems

  1. Radiation dose during tomography of the petrous bone. Experimental investigations with film dosimetry on an Alderson phantom

    Energy Technology Data Exchange (ETDEWEB)

    Grehn, S.

    1988-06-01

    Using filmdosimetry and an Alderson skull phantom, the iso-dose distribution during tomography of the petrous bone was investigated. We were particularly concerned with the radiation dose to the lens of the eye, the critical organ in the skull, and to the inner ear, using different types of examination and various positions of the skull. The choice of suitable film material and standardisation against TLD measurements is crucial for the accuracy of film dosimetry, allowing for correction of film blackening in relation to varying energies. Tomography of the petrous bone in the prone position produced a reduction in radiation dose to the eye to only 1 to 4% of the dose incident on the occiput. In this way, and using high definition screen and grinds, it is possible to obtain optimal tomographic images despite drastic reduction of the scattered radiation to the eye. Radiation dose to the inner ear is greatly below any significant somatic dose, irrespective of projection or technique. Special measures to reduce radiation to the inner ear are neither effective nor sensible.

  2. Investigation of the effect of gamma radiation on lincomycin

    International Nuclear Information System (INIS)

    Al-Zier, A; Al- Kassiri, H.; Al Aji, Z.

    2001-01-01

    Sterilization of materials used in medical applications is necessary. Since the use of ethylene oxide will be forbidden in the next future and other sterilization methods as wet, and dry hot sterilization are not suitable for sterilization of drugs, further methods are needed which do not cause a significant decrease in the physical and chemical drug properties. Radiation sterilization can help in many cases. So Gamma or electron radiations were used for sterilization of antibiotics in the solid state as mentioned in the literature. Some antibiotics are already exposed to gamma or electron beam irradiation, and showed significant radiation resistance for low doses, but even small amounts of degradation products are not desirable

  3. Enhancement of Radiation Therapy in Prostate Cancer by DNA-PKcs Inhibitor

    Science.gov (United States)

    2015-09-01

    Center, Urology Habib , Amyn; UTSouthwestern Medical Center, Neurology & Neurotherapeutics Chen, Benjamin; UTSouthwestern Medical Center, Radiation...Tsong Hsieh 3,5,7 , Amyn A. Habib 4,5,6 , Benjamin Chen 1,4 and Debabrata Saha 1,4 1 Department of Radiation Oncology, 3 Department of Urology, 4

  4. Radiation therapy for digestive tumors

    International Nuclear Information System (INIS)

    Piedbois, P.; Levy, E.; Thirion, P.; Martin, L.; Calitchi, E.; Otmezguine, Y.; Le Bourgeois, J.P.

    1995-01-01

    This brief review of radiation therapy of digestive tumors in 1994 seeks to provide practical answers to the most commonly asked questions: What is the place of radiation therapy versus chemotherapy for the treatment of these patients ? What are the approved indications of radiation therapy and which avenues of research are being explored ? Radiation therapy is used in over two-thirds of patients referred to an oncology department for a gastrointestinal tract tumor. The main indications are reviewed: cancer of the rectum and anal canal and, to a lesser extent, cancer of the esophagus and pancreas. The main focuses of current research include radiation therapy-chemotherapy combinations, intraoperative radiation therapy, and radiation therapy of hepatobiliary tumors. (authors). 23 refs., 1 fig

  5. Department of Cosmic Radiation Physics: Overview

    International Nuclear Information System (INIS)

    Gawin, J.

    1998-01-01

    (full text) The Department of Cosmic Ray Physics in Lodz is involved in basic research in the area of high energy physics and cosmic ray physics related to: -Studies of asymptotic properties of hadronic interactions based on the analysis of cosmic ray propagation in the atmosphere. -Studies of the structure and properties of Extensive Air Showers induced by cosmic ray particles. - Search for point sources of high energy cosmic rays. - Studies of cosmic ray propagation in the Galaxy and mechanisms of particle acceleration. - Studies of mass composition of cosmic rays in the energy range l0 15 -10 17 eV. Theoretical and experimental studies of nuclear interactions for energies exceeding those obtained by modern particle accelerators are performed based on the results obtained by the Lodz Extensive Air Shower Array. The Lodz hodoscope can register the electromagnetic component of cosmic ray showers developing in the atmosphere as well as muons of two energy thresholds. Data collected by the Lodz array are also used to study the mass composition of cosmic rays in the energy range 10 15 -10 17 eV. The Lodz group collaborates with many foreign institutes and laboratories in construction and data interpretation of cosmic ray experiments. Our most important partners are: Forschungszentrum Karlsruhe (Germany), College de' France, the Institute for Nuclear Studies of the Russian Academy of Science, the University of Perpignan (France) and Uppsala University (Sweden). (author)

  6. Health regulations about radiation oncology in Spain: The legislative dilemma between radiation protection and treatment of cancer

    International Nuclear Information System (INIS)

    Esco, R.; Biete, A.; Pardo, J.; Carceller, J.A.; Veira, C.; Palacios, A.; Vazquez, M.G.

    2001-01-01

    The Royal Decree 1566/1998 of July 17th establishes the criteria on quality in radiation therapy and is a cornerstone in Spanish regulation of this medical field. The Royal Decree gives some rules that, from a medical point of view, are considered as a good practice. Radiation protection of patients is necessary to achieve a high quality radiation oncology treatments. That is the reason why Royal decree 1566/1998 is titled 'quality criteria in radiation therapy'. A quality control program must be tailored to every single radiation oncology department and, for this reason, its standardization is difficult. Nevertheless, some medical procedures are defined by the royal decree and such procedures are the minimum criteria that all the departments must follow in the development of its own quality control program. The authors make some reflections about health regulations about radiation oncology in Spain, pointing out that a legislative dilemma between radiation protection and treatment of cancer due to application of the legislative rules may occur. The social and medical cost of rigid bureaucratic procedures is pointed out. A large amount of equipment controls and measurements takes time that could be used in treating patients. This is more important in an environment of limited technical and human resources. (author)

  7. Investigation of the radiative efficiency and threshold in InGaN laser diodes under the influence of efficiency droop

    International Nuclear Information System (INIS)

    Ryu, Han-Youl

    2012-01-01

    Based on the rate equation model of semiconductor lasers, the radiative efficiency and threshold current density of InGaN-based blue laser diodes (LDs) are theoretically investigated, including the effect of efficiency droop in the InGaN quantum wells. The peak point of the radiative efficiency versus current density relation is used as the parameter of the rate equation analysis. The threshold current density of InGaN blue LDs is found to depend strongly on the maximum radiative efficiency at low current density, implying that improving the maximum efficiency is important to maintain a high radiative efficiency at a large current density and to achieve a low-threshold lasing action under the influence of efficiency droop.

  8. Radiodiagnostic measurements radiation load of children by chest

    International Nuclear Information System (INIS)

    Nikodemova, D.; Vladar, M.; Ranogajec, M.; Horvathova, M

    1998-01-01

    In the district of Slovak Republic we have tried to estimate the radiation load of children to 15 years by chest radiodiagnostic examinations. Our data were collected using measurements with TLD for 100 patients divided in 5 age categories at six radiodiagnostic departments. The analysis of obtained absorbed doses as a function of age for chest radiodiagnostic examinations has shown, that the investigated Slovak radiodiagnostic centres use rather lower voltage techniques and the entrance surface doses are much higher than the proposed value of European Communities. (authors)

  9. Surface Radiation Budget (SURFRAD) Network 1-Hour Observations

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Radiation measurements at SURFRAD stations cover the range of the electromagnetic spectrum that affects the earth/atmosphere system. Direct solar radiation is...

  10. Radiation safety handbook for ionizing and nonionizing radiation

    International Nuclear Information System (INIS)

    Kincaid, C.B.

    1976-10-01

    The Handbook is directed primarily to users of radiation sources throughout the Food and Drug Administration. Specific precautions regarding the possession and use of radiation sources in meeting the Agency's objectives are an inherent responsibility of all employees. In addition, the increased emphasis on occupational safety and health and the responsibilities placed on the Department by Public Law and Executive Order make it mandatory that all organizational levels and activities conform to the intent of this Handbook. The policies and procedures described in this document apply to all Agency operators and activities and are intended to protect employees and the general public

  11. Investigation of P(VDF-TrFE)/ZrO{sub 2}-MMA polymer composites applied to radiation shielding

    Energy Technology Data Exchange (ETDEWEB)

    Fontainha, C.C.P. [Depto. de Engenharia Nuclear - UFMG, Av. Antonio Carlos 6627, 31270-970 Belo Horizonte, MG (Brazil); Baptista Neto, A.T.; Santos, A.P.; Faria, L.O. [Centro de Desenvolvimento da Tecnologia Nuclear, Av. Antonio Carlos 6627, C.P. 941, 30270-901, Belo Horizonte, MG (Brazil)

    2015-07-01

    Exposure to high radiation dose in medical diagnostic imaging procedures can lead patients to suffer tissue damaging. However, there are several studies that identify significant dose reduction with the use of radiation protective attenuators, minimizing the delivered dose in the region that covers the main beam, while preserving the diagnostic quality of the generated image. Most radiation attenuator materials are produced from shielding metal containing composites, whose efficiency is the goal of investigations around the world. In this context, polymeric materials were chosen for this investigation in order to provide light-weighted and flexible protective composites, a must in personal protective shielding. Therefore, this work is concerned to the investigation of poly(vinylidene fluoride - try-fluor-ethylene) [P(VDF-TrFE)] copolymers mixed with zirconia nanoparticles. The resulting polymer composites, prepared with 1, 2, 3, 5 and 10 at.% of ZrO{sub 2} nanoparticles, were investigated for application as protective shielding in some interventional radiology procedures. Two variety of composites were produced, one using pure ZrO{sub 2} nanoparticles and the other using sol-gel route with zirconium butoxide as the precursor for zirconium oxide nano-clusters. The P(VDFTrFE)/ ZrO2-MMA polymer composites produced by sol-gel route have provided a much better dispersion of the pure ZrO{sub 2} material into the P(VDF-TrFE) host matrix. UV-Vis and FTIR spectrometry and differential scanning calorimetry (DSC) were used to characterize the composite samples. FTIR data reveal a possible link between the MMA monomers with the P(VDF-TrFE) chain through shared C=O bonds. The radiation shielding characterization was conducted by using a 70 kV x-rays beam which is applicable, for instances, in catheter angiography. The results demonstrate that composites with 10% of ZrO{sub 2}, and only 1.0 mm thick, can attenuate 60% of the x-rays beam. The composite density was evaluated to be

  12. Synchrotron-Radiation X-Ray Investigation of Li+/Na+ Intercalation into Prussian Blue Analogues

    Directory of Open Access Journals (Sweden)

    Yutaka Moritomo

    2013-01-01

    Full Text Available Prussian blue analogies (PBAs are promising cathode materials for lithium ion (LIB and sodium ion (SIB secondary batteries, reflecting their covalent and nanoporous host structure. With use of synchrotron-radiation (SR X-ray source, we investigated the structural and electronic responses of the host framework of PBAs against Li+ and Na+ intercalation by means of the X-ray powder diffraction (XRD and X-ray absorption spectroscopy (XAS. The structural investigation reveals a robust nature of the host framework against Li+ and Na+ intercalation, which is advantageous for the stability and lifetime of the batteries. The spectroscopic investigation identifies the redox processes in respective plateaus in the discharge curves. We further compare these characteristics with those of the conventional cathode materials, such as, LiCoO2, LiFePO4, and LiMn2O4.

  13. A Delphi study on research priorities in radiation therapy: The Norwegian perspective

    International Nuclear Information System (INIS)

    Egestad, H.; Halkett, G.K.B.

    2016-01-01

    Introduction: Although radiation therapists (RTs) need to engage more in research to establish an evidence base for their daily practice the majority conduct little research themselves. This project is the second stage of a Delphi process aimed at determining research priorities in radiation therapy in Norway. The aim of this article is to prioritize the research areas radiation therapists in Norway think are most important in their own profession. Methods: A questionnaire was administered using responses to a previous questionnaire, which identified the research interests of Norwegian RTs. The survey was sent to all Norwegian departments of radiation oncology, and RTs were asked to form interest groups to discuss and prioritize the research areas. Results: There was a 70% response rate, seven of 10 departments participated. The highest ranked research categories were imaging in radiation therapy and radiation therapist education. Seven of the top ten ranked research areas were in these categories. Conclusion: Prioritization of research areas and categories provides a useful list of future research for Norwegian RTs, which will enable them to decide whether their research ideas are a high priority, and spend less time deciding on a relevant research topic that needs investigation in their own workplaces. - Highlights: • Norwegian RTs prioritize research about performing their professional practice. • Main points of research interests are about new techniques and competence. • The top ten are about treatment plan, doses, safety and relationship with patients. • Prioritization of research areas provides a useful list of future research.

  14. Investigation on the acceptance level of radiation exposure. Comparison of Chinese and Japanese

    International Nuclear Information System (INIS)

    Wu, Jin; Katoh, Kazuaki

    1999-01-01

    Radiation has helped to develop our culture and civilization, both of material and of spiritual, and without doubt it is useful to develop our civilization further and to enrich our future life. On the other hand, we cannot help avoiding to live with some by-product radiation of 'advanced civilization' in addition. Thus we must associate with radiation even if we like it or not. To our understanding, safety standard or criteria of safety control is nothing but a contract of the body concerned with the society. In order to make this contract rigorously, it is required for both sides to have adequately enough knowledge and data on the methodology of treating the matter. In such societies, people's acceptable levels to radiation exposure would not be widely distributed. Unification of the wills of the society is absolutely necessary to establish such a contact or develop the philosophy on radiation safety. Hence, we have tried to investigate the acceptable levels of people to radiation exposure. Two kinds of levels, upper limit of the acceptable dose for instantaneous whole body exposure, Lu, and lowest of the dose caring in mind, Ll, were set for inquiry. In this presentation, some results of our survey to both Chinese and Japanese professionals in the fields of science-technology and medical science are reported. Similarly to the previous study by Katoh, in 1989 or so, the distribution of these two levels were very broad and the band widths between the two levels, Lu and Ll, were quite narrow. The former seems reveal the variety of individual's sense of value. Moreover, it was found that, two levels, Lu and Ll, were significantly higher (p<0.05, p<0.005) in Japanese to in Chinese in science/engineering group, while in medical group, the two levels were higher apparently in Japanese than in Chinese, but no statistically significant difference was observed. Moreover, in medical group, Lu and Ll showed higher values than those in science-technology group for the

  15. Qualitative Assessment of Academic Radiation Oncology Department Chairs' Insights on Diversity, Equity, and Inclusion: Progress, Challenges, and Future Aspirations.

    Science.gov (United States)

    Jones, Rochelle D; Chapman, Christina H; Holliday, Emma B; Lalani, Nafisha; Wilson, Emily; Bonner, James A; Movsas, Benjamin; Kalnicki, Shalom; Formenti, Silvia C; Thomas, Charles R; Hahn, Stephen M; Liu, Fei-Fei; Jagsi, Reshma

    2018-05-01

    A lack of diversity has been observed in radiation oncology (RO), with women and certain racial/ethnic groups underrepresented as trainees, faculty, and practicing physicians. We sought to gain a nuanced understanding of how to best promote diversity, equity, and inclusion (DEI) based on the insights of RO department chairs, with particular attention given to the experiences of the few women and underrepresented minorities (URMs) in these influential positions. From March to June 2016, we conducted telephone interviews with 24 RO department chairs (of 27 invited). Purposive sampling was used to invite all chairs who were women (n = 13) or URMs (n = 3) and 11 male chairs who were not URMs. Multiple analysts coded the verbatim transcripts. Five themes were identified: (1) commitment to DEI promotes quality health care and innovation; (2) gaps remain despite some progress with promoting diversity in RO; (3) women and URM faculty continue to experience challenges in various career domains; (4) solutions to DEI issues would be facilitated by acknowledging realities of gender and race; and (5) expansion of the career pipeline is needed. The chairs' insights had policy-relevant implications. Bias training should broach tokenism, blindness, and intersectionality. Efforts to recruit and support diverse talent should be deliberate and proactive. Bridge programs could engage students before their application to medical school. Copyright © 2018 Elsevier Inc. All rights reserved.

  16. Radiation physics, biophysics and radiation biology. Progress report, December 1, 1984-November 30, 1985

    International Nuclear Information System (INIS)

    Rossi, H.H.

    1985-07-01

    This is the annual progress report for the Radiological Research Laboratory, Department of Radiology, Columbia University. The report consists of 17 individual reports plus an overall summary. Reports survey research results in neutron dosimetry, microdosimetry of electron beams and x-radiation, development of theoretical models for biological radiation effects and induction of oncogenic transformations. Individual abstracts were also prepared for each paper

  17. FINAL REPORT FORMER RADIATION WORKER MEDICAL SURVEILLANCE PROGRAM AT ROCKY FLATS For Department of Energy Programs

    Energy Technology Data Exchange (ETDEWEB)

    Joe M. Aldrich

    2004-11-01

    The Former Radiation Worker Medical Surveillance Program at Rocky Flats was conducted in Arvada, CO, by Oak Ridge Associated Universities through the Oak Ridge Institute for Science and Education under DOE Contract DE-AC05-00OR22750. Objectives of the program were to obtain information on the value of medical surveillance among at-risk former radiation workers and to provide long-term internal radiation dosimetry information to the scientific community. This program provided the former radiation workers of the Rocky Flats Environmental Technology Site (formerly Rocky Flats Plant) an opportunity to receive follow-up medical monitoring and a re-evaluation of their internal radiation dose. The former Rocky Flats radiation worker population is distinctive because it was a reasonably stable work force that received occupational exposures, at times substantial, over several decades. This report reflects the summation of health outcomes, statistical analyses, and dose assessment information on former Rocky Flats radiation workers to the date of study termination as of March 2004.

  18. FINAL REPORT. FORMER RADIATION WORKER MEDICAL SURVEILLANCE PROGRAM AT ROCKY FLATS For Department of Energy Programs

    International Nuclear Information System (INIS)

    Aldrich, Joe M.

    2004-01-01

    The Former Radiation Worker Medical Surveillance Program at Rocky Flats was conducted in Arvada, CO, by Oak Ridge Associated Universities through the Oak Ridge Institute for Science and Education under DOE Contract DE-AC--05-00OR22750. Objectives of the program were to obtain information on the value of medical surveillance among at-risk former radiation workers and to provide long-term internal radiation dosimetry information to the scientific community. This program provided the former radiation workers of the Rocky Flats Environmental Technology Site (formerly Rocky Flats Plant) an opportunity to receive follow-up medical monitoring and a re-evaluation of their internal radiation dose. The former Rocky Flats radiation worker population is distinctive because it was a reasonably stable work force that received occupational exposures, at times substantial, over several decades. This report reflects the summation of health outcomes, statistical analyses, and dose assessment information on former Rocky Flats radiation workers to the date of study termination as of March 2004

  19. Low-level radiation: biological interactions, risks, and benefits. A bibliography

    International Nuclear Information System (INIS)

    1978-09-01

    The bibliography contains 3294 references that were selected from the Department of Energy's data base (EDB). The subjects covered are lower-level radiation effects on man, environmental radiation, and other biological interactions of radiation that appear to be applicable to the low-level radiation problem

  20. Microbiology of the surface water samples in the high background radiation areas of Ramsar, Iran

    International Nuclear Information System (INIS)

    Motamedifar, Mohammad; Zamani, Khosrow; Sedigh, Hadi; Mortazavi, Seyed Mohammad Javad; Taeb, Shahram; Haghani, M.; Mortazavi, Seyed Ali Reza; Soofi, Amir

    2014-01-01

    Residents of high background radiation areas of Ramsar have lived in these areas for many generations and received radiation doses much higher than the dose limit recommended by ICRP for radiation workers. The radioactivity of the high background radiation areas of Ramsar is reported to be due to 226 Ra and its decay products, which have been brought to the surface by the waters of hot springs. Over the past years the department has focused on different aspects of the health effects of the elevated levels of natural radiation in Ramsar. This study was aimed to perform a preliminary investigation on the bioeffects of exposure to elevated levels of natural radiation on the microbiology of surface water samples. Water samples were collected from surface water streams in Talesh Mahalleh district, Ramsar as well as a nearby area with normal levels of background radiation. Only two strains of bacteria, that is, Providencia stuartii and Shimwellia blattae, could be isolated from the water samples collected from high background radiation areas, while seven strains (Escherichia coli, Enterobacter asburiae, Klebsiella pneumoniae, Shigella dysenteriae, Buttiauxella agerstis, Tatumella punctuata and Raoultella ornithinolytica) were isolated from the water samples collected from normal background radiation areas. All the bacteria isolated from water samples of high and normal background radiation areas were sensitive to ultraviolet radiation, heat, betadine, alcohol, and deconex. Although other investigators have reported that bacteria isolated from hot springs show radioresistance, the results reported here do not reveal any adaptive response. (author)

  1. Diagnosis of 20 cases with chronic radiation syndrome

    International Nuclear Information System (INIS)

    Zhang, Hongshou; Shen, Zhezhong; Wen Zhigen; Xie, Xiaoping; Ni, Jinxian

    1984-01-01

    Twenty cases with chronic radiation syndrome were diagnosed in our department during 1957-1980. All except one were radiologists, and eight of them had worked in radiological departments for over 20 years. Owing to the use of out-dated x-ray machines as well as radium sources without adequate protection, all these cases were apparently overexposed to radiation. They presented following signs and symptoms of chronic radiation syndrome: excitability, palpitation, fatigue, general weakness, loss of weight, oversweating accompanied by tendency of lowered metabolism, peripheral blood cell changes, and chromosome aberrations. The diagnosis of this syndrome was based on definitive professional and over-exposure history, clinical picture and abnormal laboratory findings. (author)

  2. Potential GTCC LLW sealed radiation source recycle initiatives

    International Nuclear Information System (INIS)

    Fischer, D.

    1992-04-01

    This report suggests 11 actions that have the potential to facilitate the recycling (reuse or radionuclide) of surplus commercial sealed radiation sources that would otherwise be disposed of as greater-than-Class C low-level radioactive waste. The suggestions serve as a basis for further investigation and discussion between the Department of Energy, Nuclear Regulatory Commission, Agreement States, and the commercial sector. Information is also given that describes sealed sources, how they are used, and problems associated with recycling, including legal concerns. To illustrate the nationwide recycling potential, Appendix A gives the estimated quantity and application information for sealed sources that would qualify for disposal in commercial facilities if not recycle. The report recommends that the Department of Energy initiate the organization of a forum to explore the suggested actions and other recycling possibilities

  3. Low-level radiation: biological interactions, risks, and benefits. A bibliography

    Energy Technology Data Exchange (ETDEWEB)

    None

    1978-09-01

    The bibliography contains 3294 references that were selected from the Department of Energy's data base (EDB). The subjects covered are lower-level radiation effects on man, environmental radiation, and other biological interactions of radiation that appear to be applicable to the low-level radiation problem.

  4. Clinical investigation of predictors of radiation-induced bronchiolitis obliterans organizing pneumonia syndrome after breast-conserving therapy

    International Nuclear Information System (INIS)

    Matsuyama, Tomohiko; Furusawa, Mitsuhiro; Yasunaga, Tadamasa; Nishimura, Reiki; Ohya, Natsuo

    2011-01-01

    We investigated 710 patients with breast cancer who received radiotherapy after breast-conserving surgery at our institution to evaluate the incidence of radiation-induced bronchiolitis obliterans organizing pneumonia (BOOP) syndrome focusing on the interval from irradiation to onset and the clinical presentation. The predictive value of age (≤50 or >50), chemotherapy and hormone therapy was statistically analyzed to determine whether these are risk factors for BOOP syndrome. Radiation-induced BOOP syndrome was seen in 1.3% (9/710). In most cases, the symptoms were mild and none of the patients required hospitalization. Eight patients (88.9%) responded well to steroid administration, but 5 of these patients relapsed after or during tapering of steroids. Although we could not detect significant risk factors for BOOP syndrome, a higher patient age was associated with a higher incidence of radiation-induced BOOP syndrome after breast-conserving therapy. (author)

  5. Department of Nuclear Safety Research and Nuclear Facilities annual report 1995

    International Nuclear Information System (INIS)

    Majborn, B.; Brodersen, K.; Damkjaer, A.; Floto, H.; Jacobsen, U.; Oelgaard, P.L.

    1996-03-01

    The report presents a summary of the work of the Department of Nuclear Safety Research and Nuclear Facilities in 1995. The department's research and development activities are organized in three research programmes: Radiation Protection, Reactor Safety, and Radioanalytical Chemistry. The nuclear facilities operated by the department include the Research Reactor DR3, the Isotope Laboratory, the Waste Treatment Plant, and the Educational Reactor DR1. Lists of staff and publications are included together with a summary of the staff's participation in national and international committees. (au) 5 tabs., 21 ills

  6. Investigation of radiation defects in InSb formed by charged high energy nuclear particles

    International Nuclear Information System (INIS)

    Vikhlij, G.A.; Karpenko, A.Ya.; Litovchenko, P.G.; Tarabrova, L.I.; Groza, A.A.

    1990-01-01

    A possibility of creation of high concentrations of radiation defects in the bulk of InSb samples by 47 MeV protons and 80 MeV alpha particles is considered. Dose dependences of electroconductivity, optical absorption spectra as well as temperature and field relations of galvanomagnetic properties of samples with defects are investigated. Annealing stages and electrical properties of defects annealed at these stages are determined. 17 refs.; 7 figs

  7. Title Investigation of the influence of various factors on the power of heat exchange by radiation

    Directory of Open Access Journals (Sweden)

    Korolyov Alexander V.

    2017-04-01

    Full Text Available The issue of lack of knowledge of radiation heat transfer process has been repeatedly raised in various studies. Despite the fact that works on study of heat transfer by radiation covers a wide range of different industries, it should be noted the lack of materials on study of heat exchange processes by radiation in a core of a nuclear reactor. In this work, the fuel assemblies of the VVER-1000 reactor were used as the bodies under study. Aim: The aim of the research is to investigate the heat exchange process between heat transfer assemblies and to study of the effect of changing the distance between the fuel assemblies on their power taking into account the inter-radiating of assemblies. Materials and Methods: A general description of the process of heat transfer by radiation. A calculation study of the effect of geometric parameters on heat transfer in the close lattice of the reactor core is performed. The influence of heat transfer by radiation on the temperature change of the fuel assemblies surface of the VVER-1000 reactor at change in the cassette gap is studied. The change in the power of the fuel assemblies relative to the initial power with a change in the cassette gap was studied. Experimental measurements of the temperature at different distances from the radiation source were made with an obstacle in the path of radiation propagation in the form of glass and water of different levels. The heat radiation and convective heat transfer are calculated based on the obtained experimental data. The calculation of thermal radiation power and convective heat transfer based on the obtained experimental data is performed. Results: The calculation results show that in models that determine the temperature of the fuel assemblies in the core of the VVER-1000 reactor, the radiation heat transfer must be taken into account. In this case, the amount of transferred energy is the greater, the smaller the distance between objects. This is observed

  8. Safety practices, perceptions, and behaviors in radiation oncology: A national survey of radiation therapists.

    Science.gov (United States)

    Woodhouse, Kristina Demas; Hashemi, David; Betcher, Kathryn; Doucette, Abigail; Weaver, Allison; Monzon, Brian; Rosenthal, Seth A; Vapiwala, Neha

    Radiation therapy is complex and demands high vigilance and precise coordination. Radiation therapists (RTTs) directly deliver radiation and are often the first to discover an error. Yet, few studies have examined the practices of RTTs regarding patient safety. We conducted a national survey to explore the perspectives of RTTs related to quality and safety. In 2016, an electronic survey was sent to a random sample of 1500 RTTs in the United States. The survey assessed department safety, error reporting, safety knowledge, and culture. Questions were multiple choice or recorded on a Likert scale. Results were summarized using descriptive statistics and analyzed using multivariate logistic regression. A total of 702 RTTs from 49 states (47% response rate) completed the survey. Respondents represented a broad distribution across practice settings. Most RTTs rated department patient safety as excellent (61%) or very good (32%), especially if they had an incident learning system (ILS) (odds ratio, 2.0). Only 21% reported using an ILS despite 58% reporting an accessible ILS in their department. RTTs felt errors were most likely to occur with longer shifts and poor multidisciplinary communication; 40% reported that burnout and anxiety negatively affected their ability to deliver care. Workplace bullying was also reported among 17%. Overall, there was interest (62%) in improving knowledge in patient safety. Although most RTTs reported excellent safety cultures within their facilities, overall, there was limited access to and utilization of ILSs by RTTs. Workplace issues identified may also represent barriers to delivering quality care. RTTs were also interested in additional resources regarding quality and safety. These results will further enhance safety initiatives and inform future innovative educational efforts in radiation oncology. Copyright © 2017 American Society for Radiation Oncology. Published by Elsevier Inc. All rights reserved.

  9. Final report of the specific research. Investigations on the analysis of bio-protective factors against radiation. 1998-2000 FY (Research Group of NIRS)

    International Nuclear Information System (INIS)

    2002-03-01

    This report concerns investigations in the title conducted by 8 groups of National Institute of Radiological Sciences (NIRS) during the period of 1998-2000. The groups are for investigation of: Effects of p53 tumor suppressor gene in radiation-induced leukemia, Role of atm-gene in dose rate effect of ionizing radiation, Function of DNA-dependent protein kinase catalytic subunit (DNA-PK cs ), Functional complementation of radiation-sensitive mutant M10 cell line by human XRCC4 cDNA expression, Role of radiation-induced apoptosis in digital defects in embryonic mice, Functional analysis of S-phase specific novel nuclear protein NP95 by gene targeting, Role of chemokine in T cell development and lymphomagenesis, and establishment of production techniques of gene-modified mice using embryonic stem cells for genetic analysis of radiation-sensitive genes. The groups describe summaries of their studies and published original articles are also given. (N.I.)

  10. Final report of the specific research. Investigations on the analysis of bio-protective factors against radiation. 1998-2000 FY (Research Group of NIRS)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-03-01

    This report concerns investigations in the title conducted by 8 groups of National Institute of Radiological Sciences (NIRS) during the period of 1998-2000. The groups are for investigation of: Effects of p53 tumor suppressor gene in radiation-induced leukemia, Role of atm-gene in dose rate effect of ionizing radiation, Function of DNA-dependent protein kinase catalytic subunit (DNA-PK{sub cs}), Functional complementation of radiation-sensitive mutant M10 cell line by human XRCC4 cDNA expression, Role of radiation-induced apoptosis in digital defects in embryonic mice, Functional analysis of S-phase specific novel nuclear protein NP95 by gene targeting, Role of chemokine in T cell development and lymphomagenesis, and establishment of production techniques of gene-modified mice using embryonic stem cells for genetic analysis of radiation-sensitive genes. The groups describe summaries of their studies and published original articles are also given. (N.I.)

  11. Investigation of thermo-optical characteristics of the interaction processes of laser radiation with silver nanoparticles

    International Nuclear Information System (INIS)

    Pustovalov, V K; Astafyeva, L G

    2013-01-01

    Metallic nanoparticles have been actively investigated in recent years by different optical and laser methods with the purpose of their applications in optoelectronics and photonics, chemistry, laser nanobiomedicine, optical diagnostics, and other fields. A major role among metallic nanoparticles is played by nanoparticles from the noble metals (silver, gold, etc). These particles have unique plasmonic properties (resonances in the range of wavelength 400–540 nm), which can be used for the absorption, scattering and transformation of laser energy. Analysis of the thermo-optical characteristics of the interaction processes of laser radiation with silver nanoparticles is carried out, taking into account absorption, scattering and extinction of laser radiation by nanoparticles, as well as the thermo-optical and other properties of nanoparticles. Estimations are made of the influence of these nanoparticle properties on the possible results of laser radiation interaction with silver nanoparticles, including heating, heat exchange, possible melting and evaporation, and processes in the ambient media. These results can be used in laser processing of silver nanoparticles and their applications in laser nanomedicine. (paper)

  12. Investigation of advanced propulsion technologies: The RAM accelerator and the flowing gas radiation heater

    Science.gov (United States)

    Bruckner, A. P.; Knowlen, C.; Mattick, A. T.; Hertzberg, A.

    1992-01-01

    The two principal areas of advanced propulsion investigated are the ram accelerator and the flowing gas radiation heater. The concept of the ram accelerator is presented as a hypervelocity launcher for large-scale aeroballistic range applications in hypersonics and aerothermodynamics research. The ram accelerator is an in-bore ramjet device in which a projectile shaped like the centerbody of a supersonic ramjet is propelled in a stationary tube filled with a tailored combustible gas mixture. Combustion on and behind the projectile generates thrust which accelerates it to very high velocities. The acceleration can be tailored for the 'soft launch' of instrumented models. The distinctive reacting flow phenomena that have been observed in the ram accelerator are relevant to the aerothermodynamic processes in airbreathing hypersonic propulsion systems and are useful for validating sophisticated CFD codes. The recently demonstrated scalability of the device and the ability to control the rate of acceleration offer unique opportunities for the use of the ram accelerator as a large-scale hypersonic ground test facility. The flowing gas radiation receiver is a novel concept for using solar energy to heat a working fluid for space power or propulsion. Focused solar radiation is absorbed directly in a working gas, rather than by heat transfer through a solid surface. Previous theoretical analysis had demonstrated that radiation trapping reduces energy loss compared to that of blackbody receivers, and enables higher efficiencies and higher peak temperatures. An experiment was carried out to measure the temperature profile of an infrared-active gas and demonstrate the effect of radiation trapping. The success of this effort validates analytical models of heat transfer in this receiver, and confirms the potential of this approach for achieving high efficiency space power and propulsion.

  13. Investigating mechanical behavior and radiation resistant of fuel rods clad in nuclear power plant

    International Nuclear Information System (INIS)

    Sedgh Kerdar, A.

    1999-01-01

    interstitials in metal lattice under irradiation causes increased strength and hardness but decreases ductility in metals.The increase in strength and hardness depends on obstacles that prevent the motion of dislocations. The clustering of point defects are responsible for these changes. Irradiation also induces instabilities in phases due to enhancement of diffusion, solute segregation, precipitate formation, order- disorder transformation and resolution of small precipitates. From the microscopic point of view accumulation of vacancies accompanied by formation of He and H 2 gases under irradiation cause an increase in volume which results in swelling and eventually ends up with embrittlement of metals. This subject was described in chapter three Zirconium and its alloys are the best structural materials for fuel cladding of BWR and PWR reactors core. The working condition in the core of nuclear reactor are very serve, respect temperature and radiation dose. It should be realized that, if fuel cladding receive damage and get cracked, the first cooling cycle and the maine equipment will be contaminated with active materials which cause additional environmental problems. Furthermore, replacement of fuel rods are very costly. Therefore, for increasing life time of fuel cladding and minimizing damage, the effect of radiation and heat on Zirconium and its alloys must be investigated. This subject was described in chapter four.The mechanical behavior and radiation resistant of fuel cladding in PWR reactor (specifically WWER ) have been investigated which is described in chapter five. Result, discussion and final conclusion are summarized in last chapter and also several points for improvement have been offered

  14. Investigation of radiation effects in Hiroshima and Nagasaki using a general Monte Carlo-discrete ordinates coupling scheme

    International Nuclear Information System (INIS)

    Cramer, S.N.; Slater, C.O.

    1990-01-01

    A general adjoint Monte Carlo-forward discrete ordinates radiation transport calculational scheme has been created to study the effects of the radiation environment in Hiroshima and Nagasaki due to the bombing of these two cities. Various such studies for comparison with physical data have progressed since the end of World War II with advancements in computing machinery and computational methods. These efforts have intensified in the last several years with the U.S.-Japan joint reassessment of nuclear weapons dosimetry in Hiroshima and Nagasaki. Three principal areas of investigation are: (1) to determine by experiment and calculation the neutron and gamma-ray energy and angular spectra and total yield of the two weapons; (2) using these weapons descriptions as source terms, to compute radiation effects at several locations in the two cities for comparison with experimental data collected at various times after the bombings and thus validate the source terms; and (3) to compute radiation fields at the known locations of fatalities and surviving individuals at the time of the bombings and thus establish an absolute cause-and-effect relationship between the radiation received and the resulting injuries to these individuals and any of their descendants as indicated by their medical records. It is in connection with the second and third items, the determination of the radiation effects and the dose received by individuals, that the current study is concerned

  15. Investigation of radiative effects of the optically thick dust layer over the Indian tropical region

    Directory of Open Access Journals (Sweden)

    S. K. Das

    2013-04-01

    Full Text Available Optical and physical properties of aerosols derived from multi-satellite observations (MODIS-Aqua, OMI-Aura, MISR-Terra, CALIOP-CALIPSO have been used to estimate radiative effects of the dust layer over southern India. The vertical distribution of aerosol radiative forcing and heating rates are calculated with 100 m resolution in the lower atmosphere, using temperature and relative humidity data from balloon-borne radiosonde observations. The present study investigates the optically thick dust layer of optical thickness 0.18 ± 0.06 at an altitude of 2.5 ± 0.7 km over Gadanki, transported from the Thar Desert, producing radiative forcing and heating rate of 11.5 ± 3.3 W m−2 and 0.6 ± 0.26 K day−1, respectively, with a forcing efficiency of 43 W m−2 and an effective heating rate of 4 K day−1 per unit dust optical depth. Presence of the dust layer increases radiative forcing by 60% and heating rate by 60 times at that altitude compared to non-dusty cloud-free days. Calculation shows that the radiative effects of the dust layer strongly depend on the boundary layer aerosol type and mass loading. An increase of 25% of heating by the dust layer is found over relatively cleaner regions than urban regions in southern India and further 15% of heating increases over the marine region. Such heating differences in free troposphere may have significant consequences in the atmospheric circulation and hydrological cycle over the tropical Indian region.

  16. Induction linacs as radiation processors

    International Nuclear Information System (INIS)

    Birx, D.L.

    1986-01-01

    Experiments at the Lawrence Livermore National Laboratory (LLNL), University of California, in conjunction with the University of California at Davis have shown induction linear accelerators (linacs) to be suitable for radiation processing of food. Here we describe how it might be possible to optimize this technology developded for the Department of Defense to serve in radiation processing. The possible advantages of accelerator-produced radiation over the use of radioisotopes include a tailor-made energy spectrum that can provide much deeper penetration and thereby better dose uniformity

  17. Nevada Test Site Radiation Protection Program

    Energy Technology Data Exchange (ETDEWEB)

    Radiological Control Managers' Council, Nevada Test Site

    2007-08-09

    Title 10 Code of Federal Regulations (CFR) 835, 'Occupational Radiation Protection', establishes radiation protection standards, limits, and program requirements for protecting individuals from ionizing radiation resulting from the conduct of U.S. Department of Energy (DOE) activities. 10 CFR 835.101(a) mandates that DOE activities be conducted in compliance with a documented Radiation Protection Program (RPP) as approved by DOE. This document promulgates the RPP for the Nevada Test Site (NTS), related (onsite or offsite) DOE National Nuclear Security Administration Nevada Site Office (NNSA/NSO) operations, and environmental restoration offsite projects.

  18. Assuring radiation protection for the public

    International Nuclear Information System (INIS)

    Hardin, C.M.

    1975-01-01

    Some topics discussed are: accomplishments and activities of the Conference Task Forces; incorporation of the Conference in the state of Arkansas; state regulations for the control of radiation; role of U. S. Department of Labor in development of uniform radiation regulations; and meetings of the Executive Committee with Commissions of the NRC

  19. Antioxidant-Conjugated Onto Gamma-Generated Chitosan Nanoparticle for Radiation Sterilized Medical Plastic

    Energy Technology Data Exchange (ETDEWEB)

    Pasaphan, W. [Department of Applied Radiation and Isotopes, Faculty of Science Kasetsart University, Bangkok (Thailand)

    2009-07-01

    The Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Bangkok, Thailand, mainly gives the course of study in the field of radiation and nuclear science and technology. The research actitivies relevant to the department are about nuclear instrument and analytical technique by nuclear methodology, radiation chemistry and processing technology, and radiation biology and agriculture. My work going on in the department is separated into two main responsibilities, i.e. (i) teaching courses and (ii) research activity. For (i), in the present time, there are 5 courses (i.e., radiation detection technique, radiation health protection, nuclear method of analysis, radioistope tracer techniques in biology and seminar) for bachelor degree and 4 courses (radiation chemistry and processing, radiation detection and dosimetry, nuclear facilities and utilization, research method in applied radiation and isotope) for master degree. In the case of (ii), my research interests head on the radiation chemistry and processing applicable to material and nanomaterial development for industrial applications, e.g. nanofilter and metal absorbent material; for medical applications, e.g. bio-additive for medical material, nanoparticle for drug delivery system, radiosensitizer for radiotherapy; for agricultural applications, e.g. pest controlled compound and plastic. The researches are also attended to biopolymer especially chitin-chiosan including functional polymer. The material for radiation dosimeter based on EPR is furthermore interesting to look for.

  20. Antioxidant-Conjugated Onto Gamma-Generated Chitosan Nanoparticle for Radiation Sterilized Medical Plastic

    International Nuclear Information System (INIS)

    Pasaphan, W.

    2009-01-01

    The Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Bangkok, Thailand, mainly gives the course of study in the field of radiation and nuclear science and technology. The research actitivies relevant to the department are about nuclear instrument and analytical technique by nuclear methodology, radiation chemistry and processing technology, and radiation biology and agriculture. My work going on in the department is separated into two main responsibilities, i.e. (i) teaching courses and (ii) research activity. For (i), in the present time, there are 5 courses (i.e., radiation detection technique, radiation health protection, nuclear method of analysis, radioistope tracer techniques in biology and seminar) for bachelor degree and 4 courses (radiation chemistry and processing, radiation detection and dosimetry, nuclear facilities and utilization, research method in applied radiation and isotope) for master degree. In the case of (ii), my research interests head on the radiation chemistry and processing applicable to material and nanomaterial development for industrial applications, e.g. nanofilter and metal absorbent material; for medical applications, e.g. bio-additive for medical material, nanoparticle for drug delivery system, radiosensitizer for radiotherapy; for agricultural applications, e.g. pest controlled compound and plastic. The researches are also attended to biopolymer especially chitin-chiosan including functional polymer. The material for radiation dosimeter based on EPR is furthermore interesting to look for

  1. Performance investigation of an automotive car radiator operated with nanofluid-based coolants (nanofluid as a coolant in a radiator)

    International Nuclear Information System (INIS)

    Leong, K.Y.; Saidur, R.; Kazi, S.N.; Mamun, A.H.

    2010-01-01

    Water and ethylene glycol as conventional coolants have been widely used in an automotive car radiator for many years. These heat transfer fluids offer low thermal conductivity. With the advancement of nanotechnology, the new generation of heat transfer fluids called, 'nanofluids' have been developed and researchers found that these fluids offer higher thermal conductivity compared to that of conventional coolants. This study focused on the application of ethylene glycol based copper nanofluids in an automotive cooling system. Relevant input data, nanofluid properties and empirical correlations were obtained from literatures to investigate the heat transfer enhancement of an automotive car radiator operated with nanofluid-based coolants. It was observed that, overall heat transfer coefficient and heat transfer rate in engine cooling system increased with the usage of nanofluids (with ethylene glycol the basefluid) compared to ethylene glycol (i.e. basefluid) alone. It is observed that, about 3.8% of heat transfer enhancement could be achieved with the addition of 2% copper particles in a basefluid at the Reynolds number of 6000 and 5000 for air and coolant respectively. In addition, the reduction of air frontal area was estimated.

  2. Department of Training and Consulting: Overview

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    2002-01-01

    The main activity of the Department is centered on the education of pupils, students and social groups interested in ionizing radiation. The number of visitors to our Department is steadily growing. Whereas in the year 2000 we were visited by about 2100 students from various secondary schools, this number more than doubled in 2001, when it passed 5200. One day was dedicated to a meeting with a group of science teachers-methodologists. A collaboration with the National Center for Supporting Vocational Education, Warsaw, has started and will hopefully bring interesting results. In addition, the Department organized professional courses on radiation protection for employees (accelerator operators and management personnel) of the Institute. An important innovation in our activity is the opening of the Laboratory of Atomic and Nuclear Physics dedicated mainly to high-schools. However, the equipment gathered in the laboratory permits one to conduct experiments on the level of the university students lab. First groups of both, secondary school pupils as well as students of physics, have already worked in our laboratory. The Department also arranged one month training for pupils from one of the technical schools of environmental protection in Konstancin near Warsaw. In addition to the experimental setups already in the Laboratory, a solid-state AMPTEK detector was put into operation in conjunction with X-ray scattering facility. Because of this innovation, one can now study not only the production of X-rays, their wave properties and transmission through various materials, but also observe Compton scattering, thus seeing the dual nature of X-rays. Because a new set-up which shows diffraction of electrons was also put into operation, one can additionally learn about the wave-particle duality for the case of massive particles. Scientific activity was quite varied which is illustrated by the titles of papers published. However, one should stress that the main experiments were

  3. Radiation oncology: An Irish hospitals approach to supporting patients

    Energy Technology Data Exchange (ETDEWEB)

    Miller, Caragh [Cork University Hospital (Ireland)], E-mail: caragh.miller@tcd.ie

    2009-02-15

    Despite advances in medical technology, cancer is still one of the leading causes of death globally, leaving many patients to deal with the emotional and psychological aspects associated with cancer and its treatment [Department of Health and Children. A strategy for cancer control in Ireland. National Cancer Forum. Dublin; 2006]. The recognition and management of psychological conditions are an integral part of comprehensive cancer care. As a result, the Health Services Executive as part of the continuing expansion of Cork Radiation Oncology Department created the role of Information and Support Radiation Therapist. This post was specially created during June 2005 to facilitate the smooth entry into the treatment for patients and family members experiencing radiotherapy for the first time. Working alongside the oncology nurses and other health professionals the Information and Support Radiation Therapist aims to provide vital education/information and support to patients and their families. The provision of this new service for patients enables departments to adopt a holistic approach to treatment. This research identifies the cancer services and psychological support services in Ireland. Up-to-date audits of the new patient services established in the Cork Radiation Oncology Department and their psychological contribution towards cancer development and treatment are also discussed.

  4. Radiation oncology: An Irish hospitals approach to supporting patients

    International Nuclear Information System (INIS)

    Miller, Caragh

    2009-01-01

    Despite advances in medical technology, cancer is still one of the leading causes of death globally, leaving many patients to deal with the emotional and psychological aspects associated with cancer and its treatment [Department of Health and Children. A strategy for cancer control in Ireland. National Cancer Forum. Dublin; 2006]. The recognition and management of psychological conditions are an integral part of comprehensive cancer care. As a result, the Health Services Executive as part of the continuing expansion of Cork Radiation Oncology Department created the role of Information and Support Radiation Therapist. This post was specially created during June 2005 to facilitate the smooth entry into the treatment for patients and family members experiencing radiotherapy for the first time. Working alongside the oncology nurses and other health professionals the Information and Support Radiation Therapist aims to provide vital education/information and support to patients and their families. The provision of this new service for patients enables departments to adopt a holistic approach to treatment. This research identifies the cancer services and psychological support services in Ireland. Up-to-date audits of the new patient services established in the Cork Radiation Oncology Department and their psychological contribution towards cancer development and treatment are also discussed

  5. Bayesian versus frequentist statistical inference for investigating a one-off cancer cluster reported to a health department

    Directory of Open Access Journals (Sweden)

    Wills Rachael A

    2009-05-01

    Full Text Available Abstract Background The problem of silent multiple comparisons is one of the most difficult statistical problems faced by scientists. It is a particular problem for investigating a one-off cancer cluster reported to a health department because any one of hundreds, or possibly thousands, of neighbourhoods, schools, or workplaces could have reported a cluster, which could have been for any one of several types of cancer or any one of several time periods. Methods This paper contrasts the frequentist approach with a Bayesian approach for dealing with silent multiple comparisons in the context of a one-off cluster reported to a health department. Two published cluster investigations were re-analysed using the Dunn-Sidak method to adjust frequentist p-values and confidence intervals for silent multiple comparisons. Bayesian methods were based on the Gamma distribution. Results Bayesian analysis with non-informative priors produced results similar to the frequentist analysis, and suggested that both clusters represented a statistical excess. In the frequentist framework, the statistical significance of both clusters was extremely sensitive to the number of silent multiple comparisons, which can only ever be a subjective "guesstimate". The Bayesian approach is also subjective: whether there is an apparent statistical excess depends on the specified prior. Conclusion In cluster investigations, the frequentist approach is just as subjective as the Bayesian approach, but the Bayesian approach is less ambitious in that it treats the analysis as a synthesis of data and personal judgements (possibly poor ones, rather than objective reality. Bayesian analysis is (arguably a useful tool to support complicated decision-making, because it makes the uncertainty associated with silent multiple comparisons explicit.

  6. Investigation of the use of FXG gel dosimeter for UV radiation detection

    International Nuclear Information System (INIS)

    Bero, M.; Abu Kassem, I.

    2009-02-01

    The radio-chromic chemical radiation dosimeter is well known type of detectors that have been used in the measurement application of radiation dose resulting for ionizing radiation such as γ and X-rays. The detector materials consist of mainly water with added gelatin powder that gives the detector its solid shape. Other chemicals sensitive to radiation are also added to form the Ferrous-sulfate Xylenol-orange Gelatin gel detector (FXG). Ionizing radiation effects appears as an increase in the optical absorbance within a defined range of wavelengths located in the visible region of the light spectrum. These visible changes in the materials optical characteristic as a result of radiation exposure is proportional to the radiation absorbed dose at certain wave lengths. Ultraviolet radiation was found to produce similar effects in the FXG detector materials; hence we suggested studying the UV effects in details. It is known that UV radiation carry relatively high quantum energies big enough to enhance important chemical and biological reactions in some exposed medium. This study examines the most important properties required for the FXG detector to be used as a UV monitoring system that is capable of measuring the absorbed UV radiation dose. The study also works on finding chemical detector structure that is easy to be used for simulating the UV interactions with human body. It has been shown that the optical absorbance of standard size FXG samples increases linearly with the exposure time to UV radiation produced by a sun simulator source, when the beam is filtered to produces exposure similar to that found in nature. However, the UV effects are also influenced by the applied UV radiation spectrum used for irradiation as well as the thicknesses of the FXG materials.(authors)

  7. Investigation of damage mechanism by ionising radiation on biomolecules

    International Nuclear Information System (INIS)

    Lau How Mooi

    1996-01-01

    Occupational radiation hazard is a very controversial subject. Effects from high radiation doses are well known from past experiences. However, hazard from low doses is still a subject that is hotly debated upon until now. The occupational dosimetry used now is based on a macroscopic scale. Lately, microdosimetry is fast gaining recognition as a more superior way of measuring hazard. More importantly, scientists are researching the basic damage mechanism that leads to biological effects by ionising radiation. In this report, a simulation study of the basic damage mechanism is discussed . This simulation is based upon Monte Carlo calculations and using polyuridylic acid (Poly-U) as the DNA model This simulation tries to relate the physics and chemistry of interactions of ionising radiation with biomolecules. The computer codes used in this simulation, OREC and RADLYS were created by Hamm et al. (1983) in Oak Ridge National Laboratory. The biological endpoints in this simulation are the strand break and base release of the DNA, which is the precursor of all biological effects. These results are compared with model studies that had been done experimentally to check the validity of this simulation. The G-values of strand break and base release from this simulation were -2.35 and 2.75 and compared well with results from irradiation experiments by von Sonntag (I 98 7) from Max Plank's Institute, Germany

  8. Investigation of vesicle-capsular plague antigen complex formation by elastic laser radiation scattering

    Science.gov (United States)

    Guseva, N. P.; Maximova, Irina S.; Romanov, Sergey V.; Shubochkin, L. P.; Tatarintsev, Sergey N.

    1991-05-01

    Recently a great deal of attention has been given to the investigation artificial lipid liposomes, due to their application as "containers" for directed transport of biologically active compounds into particular cells, organs and tissues for prophylaxis and therapy of infectious diseases. The use of traditional methods of liposome investigation, such as sedimentation, electrophoresis and chromatography is impeded by low liposome resistivity to different deformations. In conjunction with this, optical methods of laser light scattering are promising as they allow nondisturbing, precise and quick investigations. This paper describes the investigation of vesicle systems prepared from egg lecithin of Serva Corporation and their complexes with the capsular antigen of the plague microbe. The capsular antigen Fl was obtained from EV plague microbe grown at 37° C on Huttinger agar. Fl was isolated by gel-filtration on ASA-22 followed by freeze drying of the preparation. Angular dependences of polarized radiation scattering were measured for several liposome suspension samples in a saline solution before and after the interaction with the plague microbe capsular antigen. The aim of the investigation was to analyze the nature of mutual antigen arrangement in a liposome and to develop methods for measuring its inclusion percentage.

  9. Radiation Therapy of Pituitary Tumors

    Energy Technology Data Exchange (ETDEWEB)

    Park, Moon Baik; Hong, Seong Eong [Kyunghee University College of Medicine, Seoul (Korea, Republic of)

    1989-12-15

    Radiation treatment results were analyzed in a retrospective analysis of 47 patients with pituitary adenoma treated with radiation alone or combined with surgery from 1974 through 1987 at the Department of Therapeutic Radiology of Kyung Hee University. The 5-year overall survival rates for all patients was 80.4%. Radiation therapy was effective for improving visual symptoms and headache, but could not normalize amenorrhea and galactorrhoea. There was no difference of survival rate between radiation alone and combination with surgery. Prognostic factors such as age, sex, disease type, visual field, headache and surgical treatment were statistically no significant in survival rates of these patients.

  10. Radiation Therapy of Pituitary Tumors

    International Nuclear Information System (INIS)

    Park, Moon Baik; Hong, Seong Eong

    1989-01-01

    Radiation treatment results were analyzed in a retrospective analysis of 47 patients with pituitary adenoma treated with radiation alone or combined with surgery from 1974 through 1987 at the Department of Therapeutic Radiology of Kyung Hee University. The 5-year overall survival rates for all patients was 80.4%. Radiation therapy was effective for improving visual symptoms and headache, but could not normalize amenorrhea and galactorrhoea. There was no difference of survival rate between radiation alone and combination with surgery. Prognostic factors such as age, sex, disease type, visual field, headache and surgical treatment were statistically no significant in survival rates of these patients

  11. Six sigma tools for a patient safety-oriented, quality-checklist driven radiation medicine department.

    Science.gov (United States)

    Kapur, Ajay; Potters, Louis

    2012-01-01

    The purpose of this work was to develop and implement six sigma practices toward the enhancement of patient safety in an electronic, quality checklist-driven, multicenter, paperless radiation medicine department. A quality checklist process map (QPM), stratified into consultation through treatment-completion stages was incorporated into an oncology information systems platform. A cross-functional quality management team conducted quality-function-deployment and define-measure-analyze-improve-control (DMAIC) six sigma exercises with a focus on patient safety. QPM procedures were Pareto-sorted in order of decreasing patient safety risk with failure mode and effects analysis (FMEA). Quantitative metrics for a grouped set of highest risk procedures were established. These included procedural delays, associated standard deviations and six sigma Z scores. Baseline performance of the QPM was established over the previous year of usage. Data-driven analysis led to simplification, standardization, and refinement of the QPM with standard deviation, slip-day reduction, and Z-score enhancement goals. A no-fly policy (NFP) for patient safety was introduced at the improve-control DMAIC phase, with a process map interlock imposed on treatment initiation in the event of FMEA-identified high-risk tasks being delayed or not completed. The NFP was introduced in a pilot phase with specific stopping rules and the same metrics used for performance assessments. A custom root-cause analysis database was deployed to monitor patient safety events. Relative to the baseline period, average slip days and standard deviations for the risk-enhanced QPM procedures improved by over threefold factors in the NFP period. The Z scores improved by approximately 20%. A trend for proactive delays instead of reactive hard stops was observed with no adverse effects of the NFP. The number of computed potential no-fly delays per month dropped from 60 to 20 over a total of 520 cases. The fraction of computed

  12. Observations of MeV electrons in Jupiter's innermost radiation belts and polar regions by the Juno radiation monitoring investigation: Perijoves 1 and 3

    DEFF Research Database (Denmark)

    Becker, Heidi N.; Santos-Costa, Daniel; Jørgensen, John Leif

    2017-01-01

    Juno's “Perijove 1” (27 August 2016) and “Perijove 3” (11 December 2016) flybys through the innermost region of Jupiter's magnetosphere (radial distances ... Investigation collected particle counts and noise signatures from penetrating high-energy particle impacts in images acquired by the Stellar Reference Unit and Advanced Stellar Compass star trackers, and the Jupiter Infrared Auroral Mapper infrared imager. This coordinated observation campaign sampled radiation...

  13. Radiated Emissions Test Approach

    Science.gov (United States)

    2015-10-02

    1. Draft Department of Transportation (DOT) Test Plan to Develop : Interference Tolerance Masks for GNSS Receivers in the L1 : Radiofrequency Band (1559 1610 MHz) provides high level : overview of radiated emissions test setup : 2. Presenta...

  14. Radiation-resistant control system

    International Nuclear Information System (INIS)

    Cable, T.C.; Jones, S.

    1995-01-01

    REMOTEC has developed a open-quotes radiation resistanceclose quotes control system under a U.S. Department of Energy Small Business Innovative Research (SBIR) contract with assistance from the University of Florida. The SBIR goal was to develop a radiation resistant mobile robot from the ANDROS family of hazardous duty mobile robots that REMOTEC manufactures. See Refs. 1 and 2 for additional SBIR results. The control system, as well as the entire ANDROS robot, was redesigned, where necessary, to withstand radiation doses in excess of 10 6 rad. Those components of the robot that could not be purchased as open-quotes radiation hardenedclose quotes were tested under standard operating conditions for determination of their open-quotes radiation resistance.close quotes The entire ANDROS robot was then assembled with these new components and tested to > 10 6 rad

  15. Characteristic Investigation of Unfolded Neutron Spectra with Different Priori Information and Gamma Radiation Interference

    International Nuclear Information System (INIS)

    Kim, Bong Hwan

    2006-01-01

    Neutron field spectrometry using multi spheres such as Bonner Spheres (BS) has been almost essential in radiation protection dosimetry for a long time at workplace in spite of poor energy resolution because it is not asking the fine energy resolution but requiring easy operation and measurement performance over a wide range of energy interested. KAERI has developed and used extended BS system based on a LiI(Eu) scintillator as the representative neutron spectrometry system for workplace monitoring as well as for the quantification of neutron calibration fields such as those recommended by ISO 8529. Major topics in using BS are how close the unfolded spectra is the real one and to minimize the interference of gamma radiation in neutron/gamma mixed fields in case of active instrument such as a BS with a LiI(Eu) scintillator. The former is related with choosing a priori information when unfolding the measured data and the latter is depend on how to discriminate it in intense gamma radiation fields. Influence of a priori information in unfolding and effect of counting loss due to pile-up of signals for the KAERI BS system were investigated analyzing the spectral measurement results of Scattered Neutron Calibration Fields (SNCF)

  16. Investigators find hundreds of intentional nuclear releases

    International Nuclear Information System (INIS)

    Lobsenz, G.

    1994-01-01

    Investigators with the federal Advisory Committee on Human Radiation Experiments have said that the category of intentional releases is now known to be larger, in variety and quantity, than the 13 releases identified prior to the committee's formation in January 1994 by President Clinton. The committee is now aware of hundreds of additional intentional releases. In addition to the intentional releases, the committee said it had compiled documents on 400 biomedical experiments involving radiation prior to 1975, and had at least fragmentary evidence of more than 1,000 more. The committee also discovered a top secret 1953 Defense Department policy statement on human experimentation that was based on the World War II-era Nuremberg Code. The committee said it was looking into how or whether the policy was implemented. The committee is expected to issue a final report, including recommendations on possible compensation for victims by April 1995

  17. System of laser pump and synchrotron radiation probe microdiffraction to investigate optical recording process

    International Nuclear Information System (INIS)

    Yasuda, Nobuhiro; Fukuyama, Yoshimitsu; Osawa, Hitoshi; Kimura, Shigeru; Ito, Kiminori; Tanaka, Yoshihito; Matsunaga, Toshiyuki; Kojima, Rie; Hisada, Kazuya; Tsuchino, Akio; Birukawa, Masahiro; Yamada, Noboru; Sekiguchi, Koji; Fujiie, Kazuhiko; Kawakubo, Osamu; Takata, Masaki

    2013-01-01

    We have developed a system of laser-pump and synchrotron radiation probe microdiffraction to investigate the phase-change process on a nanosecond time scale of Ge 2 Sb 2 Te 5 film embedded in multi-layer structures, which corresponds to real optical recording media. The measurements were achieved by combining (i) the pump-laser system with a pulse width of 300 ps, (ii) a highly brilliant focused microbeam with wide peak-energy width (ΔE/E ∼ 2%) made by focusing helical undulator radiation without monochromatization, and (iii) a precise sample rotation stage to make repetitive measurements. We successfully detected a very weak time-resolved diffraction signal by using this system from 100-nm-thick Ge 2 Sb 2 Te 5 phase-change layers. This enabled us to find the dependence of the crystal-amorphous phase change process of the Ge 2 Sb 2 Te 5 layers on laser power.

  18. A 10 TW pulsed energy complex PIRIT-2000 for investigation of short-wave radiation

    Energy Technology Data Exchange (ETDEWEB)

    Popkov, N F; Ryaslov, E A; Kargin, V I; Pikar` , A S; Vorontsov, V I; Kotel` nikov, D V; Melkozerov, A V [All-Russian Scientific Research Inst. of Experimental Physics, Sarov (Russian Federation)

    1997-12-31

    The results of investigation of a pulsed plasma x-ray source at the PIRIT-2000 fast operating capacitor bank are reported. The maximum energy stored in a primary 54-module capacitive storage at the output voltage of 500 kV reaches 2 MJ. The capacitor bank energizes a vacuum inductive storage, which is commutated by a plasma opening switch. The plasma diode consists of a tube cathode of diameter 15 cm and of a larger tube anode with six plasma injecting guns. The current amplitude and the current rise time at the plasma load amounts to 4 MA and 150 ns, respectively. The x-ray doses were measured by means of thermoluminescent dosemeters and the integral radiation output by means of a thermocouple calorimeter. The radiation output as high as 100 kJ was achieved at the stored energy of 1 MJ. (J.U.). 4 figs., 4 refs.

  19. A pilot investigation of natural radiation in Danish houses

    International Nuclear Information System (INIS)

    Soerensen, A.; Boetter-Jensen, L.; Majborn, B.; Nielsen, S.P.

    1985-04-01

    As a prelude to a nationwide survey a pilot study was carried out to establish techniques and procedures for the measurement of indoor radiation in Denmark. A passive cup dosemeter was designed containing CR39 track detectors and TLD's to measure radon and external radiation, respectively. The adequate performance of the dosemeter was verified in a radon intercalibration in 1984 carried out at the National Radiological Protection Board, UK. A total of 82 dwellings were selected covering most regions of the country. The dwellings were monitored in two three-month periods, one in winter and the other in summer. The average dose rate in air from external radiation was 0.09 μGy h -1 . In the winter the average radon concentrations were 88 Bq m -3 and 24 Bq m -3 for single-family houses and flats, respectively; and in the summer the corresponding values were 52 Bq m -3 and 19 Bq m -3 . (author)

  20. Investigation of radiation gamma-sterilization effect on sodium alginate hydrogels

    International Nuclear Information System (INIS)

    Valueva, M.I.; Oltarzhevskaya, N.D.; Maksimova, Yu.S.; Fenin, A.A.

    2012-01-01

    The effect of gamma-radiation in doses ensuring materials sterility (6-15 kGy) on alginate hydrogels is studied. For conservation of polymer solutions viscosity after sterilization it is necessary to introduce in polymer matrix different additives inhibiting the radiolysis process. Substances-antioxidants (aqueous extracts of sea-buckthorn and blueberry), polyvinylpyrrolidone, pectin, polyethylene oxides with molecular mass from 400 to 40000 have been studied as the additives. The additives selected have the positive effect on the result of alginate hydrogels sterilization. It is established, that the problem of human tissue radiation protection is closely connected with the problem of biopolymer hydrogels radiation protection [ru

  1. Radioprotection in nuclear medicine department of 'Porto Alegre Clinical Hospital'

    International Nuclear Information System (INIS)

    Dias, T.M.; Pinto, A.L.; Bacelar, A.L.; Dytz, A.S.; Bernasiuk, M.E.; Baptista, I.S.

    1996-01-01

    The use of ionizing radiation in medicine allows great benefits. Nuclear Medicine uses ionizing radiation for medical diagnostic, such as: tumor, cancer, and dysfunctions location. However the use of ionizing radiation must be controlled in order to avoid likely biological effects in human beings. In order to extremely minimize that these effects appear, the Medical Physics Department of the Porto Alegre Clinical Hospital has implemented some procedures to assure that handling and use of radioactive material are in a safe way. This preoccupation is considered in all the places of nuclear medicine sector since the moment when the radioactive material is brought into including its manipulation and retirement, the exam process being accompanied. (authors). 4 refs

  2. Radiation protection in nuclear medicine

    Energy Technology Data Exchange (ETDEWEB)

    Volodin, V; Hanson, G P

    1993-12-31

    The goal of this Chapter is to give a general outline of the essential principles and procedures for radiation protection in a nuclear medicine department where radionuclides are used for diagnosis and therapy. More detailed recommendations regarding radiation protection in nuclear medicine are given in the publications of the International Commission on Radiation Protection (ICRP, publications 25, 57, 60) and in ILO/IAEA/WHO Manual on Radiation Protection in Hospitals and General Practice (Volume 2: Unsealed Sources, WHO, Geneva, 1975), on which this Chapter is based. This chapter is not intended to replace the above-mentioned international recommendations on radiation protection, as well as existing national regulations on this subject, but intended only to provide guidance for implementing these recommendations in clinical practice

  3. Radiation protection in nuclear medicine

    International Nuclear Information System (INIS)

    Volodin, V.; Hanson, G.P.

    1992-01-01

    The goal of this Chapter is to give a general outline of the essential principles and procedures for radiation protection in a nuclear medicine department where radionuclides are used for diagnosis and therapy. More detailed recommendations regarding radiation protection in nuclear medicine are given in the publications of the International Commission on Radiation Protection (ICRP, publications 25, 57, 60) and in ILO/IAEA/WHO Manual on Radiation Protection in Hospitals and General Practice (Volume 2: Unsealed Sources, WHO, Geneva, 1975), on which this Chapter is based. This chapter is not intended to replace the above-mentioned international recommendations on radiation protection, as well as existing national regulations on this subject, but intended only to provide guidance for implementing these recommendations in clinical practice

  4. Radiation Detection for Homeland Security Applications

    Science.gov (United States)

    Ely, James

    2008-05-01

    In the past twenty years or so, there have been significant changes in the strategy and applications for homeland security. Recently there have been significant at deterring and interdicting terrorists and associated organizations. This is a shift in the normal paradigm of deterrence and surveillance of a nation and the `conventional' methods of warfare to the `unconventional' means that terrorist organizations resort to. With that shift comes the responsibility to monitor international borders for weapons of mass destruction, including radiological weapons. As a result, countries around the world are deploying radiation detection instrumentation to interdict the illegal shipment of radioactive material crossing international borders. These efforts include deployments at land, rail, air, and sea ports of entry in the US and in European and Asian countries. Radioactive signatures of concern include radiation dispersal devices (RDD), nuclear warheads, and special nuclear material (SNM). Radiation portal monitors (RPMs) are used as the main screening tool for vehicles and cargo at borders, supplemented by handheld detectors, personal radiation detectors, and x-ray imaging systems. This talk will present an overview of radiation detection equipment with emphasis on radiation portal monitors. In the US, the deployment of radiation detection equipment is being coordinated by the Domestic Nuclear Detection Office within the Department of Homeland Security, and a brief summary of the program will be covered. Challenges with current generation systems will be discussed as well as areas of investigation and opportunities for improvements. The next generation of radiation portal monitors is being produced under the Advanced Spectroscopic Portal program and will be available for deployment in the near future. Additional technologies, from commercially available to experimental, that provide additional information for radiation screening, such as density imaging equipment, will

  5. A Delphi study on research priorities in radiation therapy: The Australian perspective

    International Nuclear Information System (INIS)

    Cox, Jennifer; Halkett, Georgia; Anderson, Claudia; Heard, Robert

    2010-01-01

    Radiation therapists (RTs) need to engage more in research to establish an evidence base for their daily practice. However, RTs world-wide conduct little research themselves, although positive moves have been made in some countries. This project is the second stage of a Delphi process aimed at prioritising RT areas of research interest. A questionnaire was constructed using responses to a previous questionnaire which identified the research interests of Australian RTs. Fifty-three Research Areas were identified from these responses and grouped into 12 categories such as 'imaging in radiation therapy', 'symptom management', 'accuracy of patient positioning' and 'techniques/equipment'. The survey was sent to all Australian departments of radiation oncology, and RTs were asked to form interest groups to discuss and prioritise the Research Areas. There was a 50% response rate (18 of 36 departments surveyed). The highest ranked research Category was 'imaging in radiation therapy'. Six of the top 10 ranked Research Areas were within Central RT practice ('imaging in radiation therapy'; 'symptom management'; 'accuracy of patient positioning' and 'techniques/equipment') and the other four were within broader RT practice ('diversification, recognition and other professional issues'; and 'management and staff issues'). Patient Care was also considered to be an area requiring more research. This prioritization of Research Areas and categories provides a useful list of future research for RTs, which will enable them to decide whether their research ideas are a high priority, and spend less time deciding on a relevant research topic that needs investigation in their own workplaces.

  6. Radiation exposure analysis of female nuclear medicine radiation workers

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Ju Young [Dept. of Biomedical Engineering Graduate School, Chungbuk National University, Cheongju (Korea, Republic of); Park, Hoon Hee [Dept. of Radiological Technologist, Shingu College, Sungnam (Korea, Republic of)

    2016-06-15

    In this study, radiation workers who work in nuclear medicine department were analyzed to find the cause of differences of radiation exposure from General Characteristic, Knowledge, Recognition and Conduct, especially females working on nuclear medicine radiation, in order to pave the way for positive defense against radiation exposure. The subjects were 106 radiation workers who were divided into two groups of sixty-four males and forty-two females answered questions about their General Characteristic, Knowledge, Recognition, Conduct, and radiation exposure dose which was measured by TLD (Thermo Luminescence Dosimeter). The results of the analysis revealed that as the higher score of knowledge and conduct was shown, the radiation exposure decreased in female groups, and as the higher score of conduct was shown, the radiation exposure decreased in male groups. In the correlation analysis of female groups, the non-experienced in pregnancy showed decreasing amount of radiation exposure as the score of knowledge and conduct was higher and the experienced in pregnancy showed decreasing amount of radiation exposure as the score of recognition and conduct was higher. In the regression analysis on related factors of radiation exposure dose of nuclear medicine radiation workers, the gender caused the meaningful result and the amount of radiation exposure of female groups compared to male groups. In the regression analysis on related factors of radiation exposure dose of female groups, the factor of conduct showed a meaningful result and the amount of radiation exposure of the experienced in pregnancy was lower compared to the non-experienced. The conclusion of this study revealed that radiation exposure of female groups was lower than that of male groups. Therefore, male groups need to more actively defend themselves against radiation exposure. Among the female groups, the experienced in pregnancy who have an active defense tendency showed a lower radiation exposure. Thus

  7. Radiation exposure analysis of female nuclear medicine radiation workers

    International Nuclear Information System (INIS)

    Lee, Ju Young; Park, Hoon Hee

    2016-01-01

    In this study, radiation workers who work in nuclear medicine department were analyzed to find the cause of differences of radiation exposure from General Characteristic, Knowledge, Recognition and Conduct, especially females working on nuclear medicine radiation, in order to pave the way for positive defense against radiation exposure. The subjects were 106 radiation workers who were divided into two groups of sixty-four males and forty-two females answered questions about their General Characteristic, Knowledge, Recognition, Conduct, and radiation exposure dose which was measured by TLD (Thermo Luminescence Dosimeter). The results of the analysis revealed that as the higher score of knowledge and conduct was shown, the radiation exposure decreased in female groups, and as the higher score of conduct was shown, the radiation exposure decreased in male groups. In the correlation analysis of female groups, the non-experienced in pregnancy showed decreasing amount of radiation exposure as the score of knowledge and conduct was higher and the experienced in pregnancy showed decreasing amount of radiation exposure as the score of recognition and conduct was higher. In the regression analysis on related factors of radiation exposure dose of nuclear medicine radiation workers, the gender caused the meaningful result and the amount of radiation exposure of female groups compared to male groups. In the regression analysis on related factors of radiation exposure dose of female groups, the factor of conduct showed a meaningful result and the amount of radiation exposure of the experienced in pregnancy was lower compared to the non-experienced. The conclusion of this study revealed that radiation exposure of female groups was lower than that of male groups. Therefore, male groups need to more actively defend themselves against radiation exposure. Among the female groups, the experienced in pregnancy who have an active defense tendency showed a lower radiation exposure. Thus

  8. Investigation of innovative radiation imaging method and system for radiological environments

    Energy Technology Data Exchange (ETDEWEB)

    Nguyen, H. [School of Biomedical Engineering, Korea University, Seoul (Korea, Republic of); Joung, J., E-mail: jinhun.joung@nucaremed.com [School of Biomedical Engineering, Korea University, Seoul (Korea, Republic of); Nucare, Inc., Incheon (Korea, Republic of); Kim, Y. [School of Biomedical Engineering, Korea University, Seoul (Korea, Republic of); Nucare, Inc., Incheon (Korea, Republic of); Lee, K. [School of Biomedical Engineering, Korea University, Seoul (Korea, Republic of)

    2017-03-01

    We have developed a novel imaging method that can be applied to most applications in the field of radiological environment imaging. It resolves either two-dimensional (2D) or three-dimensional (3D) distributions of radioactive sources in applications for homeland security, environmental monitoring, radiation contamination monitoring, baggage inspection, nuclear power plant monitoring, and more. The proposed imaging method uses a simple detector configured as a radiation-counting detector with spectroscopic capabilities. The detector module consists of two components: a flat field-of-view (FOV) collimator with a 30° FOV opening and a typical single-channel radiation detector made of a 2 in.×2 in. NaI(Tl) scintillator coupled to a 2 in photomultiplier tube (PMT). This simple detector module makes it possible to develop a cost-effective imaging system and provide design freedom in extending the system configuration to include one-dimensional (1D) or 2D detector-array shapes to meet the needs of various applications. One of most distinctive features of the new imaging method is that it uses only a pair of 2D projections to obtain a 3D reconstruction. The projections are measured by the proposed detector module at two positions orthogonal to one another; the measured projections are manipulated to enhance the resolution of the reconstructed 3D image. The imaging method comprises several steps performed consecutively: projection measurement, energy re-binning, projection separation, resolution and attenuation recovery, image reconstruction, and image consolidation and quantitative analysis. The resolution and attenuation recovery step provides the most distinctive and important processing by which the poor quality of projection data is enhanced. Such poor quality is mainly due to the use of a simple detector with a wide-opening flat FOV collimator. Simulation and experimental studies have been conducted to validate the proposed method. In this investigation, we

  9. Radiation and Homeostasis

    International Nuclear Information System (INIS)

    Sugahara, T.; Nikaido, O.; Niwa, O.

    2002-01-01

    These proceedings aim to promote the understanding of the health hazard of radiation at low dose range and to construct a more solid basis for radiation safety policy. Radiation hazard has been the central issue of investigation in the field of radiation research. The two major approaches are mechanistic analysis by laboratory investigation and phenomenological analysis of radiation-exposed population as represented by epidemiology. In an increasingly safety-conscious society, the extremely low level risk associated with low dose of radiation has become an important issue. In this area, the phenomenological approach has a limit. DNA damage is the primary and direct cause of the risk. Tremendous progress has been made recently in the basic understanding of radiation effects on cells and tissues and the importance of damage response rather than damage itself. This challenges the classical linear non-threshold hypothesis

  10. Epidemiological investigation of radiological effects in high background radiation areas of Yangjiang, China

    International Nuclear Information System (INIS)

    Wei, Luxin; Zha, Yongru; Tao, Zufan; He, Weihui; Chen, Deqing; Yuan, Yongling

    1990-01-01

    The purpose of this investigation is to provide some information for providing whether any detrimental effects exist in a large population whose families have been continuously exposed to a low dose rate radiation. Two areas in Yangjiang Country, characterized by high background radiation (HBR) with environmental gamma exposure, large population size and long-term inhabitants, were selected for evaluation of late effects of HBR. The areas with normal radiation background close to the Yangjiang Country were selected as control areas. Up to 1986 approximately one million person-years in each area in both HBR and control areas have been observed. No increase of cancer mortality was found in the HBR areas; on the contrary, cancer mortality tended to be lower in the HBR areas than the control areas. The prevalence of hereditary diseases and congenital defects was similar in both HBR and control areas, but the frequency of Down's syndrome was higher in the HBR areas (through within the normal range) than the control areas. A possible explanation is the difference of age of maternity between the HBR and control areas, and the extremely low frequency in the control areas. Possible factors influencing the incidence of mutationbased diseases were comparable in the HBR and control groups. However, the cultural and educational levels were somewhat different, probably affecting health status and family planning. It is likely that there may be a dose threshold for cancer incidence, but this remains to be determined by further research. (N.K.)

  11. Percutaneous coronary interventions - an investigation of radiation protection in Swedish hospitals; Percutan coronar intervention PCI - en straalskyddsutredning av verksamheten paa landets sjukhus

    Energy Technology Data Exchange (ETDEWEB)

    Almen, Anja; Cederlund, Torsten; Zaar, Britta

    2005-05-01

    The Swedish Radiation Protection Authority has investigated the status of radiation protection in connection with percutaneous coronary interventions (PCI) in Swedish hospitals. A questionnaire was send to hospitals concerning basic radiation protection procedures stated in the Swedish regulations. A questionnaire was also sent out to radiologists and cardiologists and the answers from those who performed interventions were analysed. The study indicates a strong need for improving radiation protection, as an example many hospitals could not present any documents describing methods or radiation protection procedures in connection with these interventions. Moreover, the radiation dose to hands and eyes of the personnel is rarely measured and the fluoroscopic time used for the interventions is not properly analysed. SSI is convinced that many hospitals need to improve radiation protection to meet the demands of the regulations. This could be accomplished by more efficient organized radiation protection work in the hospitals.

  12. Statistical investigation on frequency, duration, number of X-ray investigations and radiation exposure to the patients of a district hospital on the outskirts of Munich

    Energy Technology Data Exchange (ETDEWEB)

    Nordmann, W

    1973-04-10

    Within the framework of a dissertation, X-ray examined patients were statistically surveyed during one month at the district hospital. The radiation exposure of the patients increased strongly particularly with men of the age of 21 to 30 and of 61 to 70. The causes are the multiply performed investigations after accidents as well as angiography at greater ages. The exposure is in the case of women particularly high between the ages of 66 and 70. In determining the gonadal exposure, the average values for the X-ray investigation at the time were referred to. The numbers give an approximate idea of to what extent single investigations with varying investigation or picture frequency can contribute to gonadal exposure.

  13. U.S. Department of Defense Multiple-Parameter Biodosimetry Network

    International Nuclear Information System (INIS)

    Blakely, William F.; Hoefer, Matthew H.; Huff, L. Andrew; Romanyukha, Alexander; Hayes, Selena M.; Williams, Anthony; Sharp, Thad; Reyes, Ricardo A.; Stewart, H. Michael Jr

    2016-01-01

    The U.S. Department of Defense (US-DOD) service members are at risk of exposure to ionizing radiation due to radiation accidents, terrorist attacks and national defense activities. The use of biodosimetry is a standard of care for the triage and treatment of radiation injuries. Resources and procedures need to be established to implement a multiple-parameter biodosimetry system coupled with expert medial guidance to provide an integrated radiation diagnostic system to meet US-DOD requirements. Current US-DOD biodosimetry capabilities were identified and recommendations to fill the identified gaps are provided. A US-DOD Multi-parametric Biodosimetry Network, based on the expertise that resides at the Armed Forces Radiobiology Research Institute and the Naval Dosimetry Center, was designed. This network based on the use of multiple biodosimetry modalities would provide diagnostic and triage capabilities needed to meet US-DOD requirements. These are not available with sufficient capacity elsewhere but could be needed urgently after a major radiological/nuclear event. (authors)

  14. Detailed Investigations of Interactions between Ionizing Radiation and Neutral Gases

    Energy Technology Data Exchange (ETDEWEB)

    Landers, Allen L

    2014-03-31

    We are investigating phenomena that stem from the many body dynamics associated with ionization of an atom or molecule by photon or charged particle. Our program is funded through the Department of Energy EPSCoR Laboratory Partnership Award in collaboration with Lawrence Berkeley National Laboratory. We are using variations on the well established COLTRIMS technique to measure ions and electrons ejected during these interactions. Photoionization measurements take place at the Advanced Light Source at LBNL as part of the ALS-COLTRIMS collaboration with the groups of Reinhard Dörner at Frankfurt and Ali Belkacem at LBNL. Additional experiments on charged particle impact are conducted locally at Auburn University where we are studying the dissociative molecular dynamics following interactions with either ions or electrons over a velocity range of 1 to 12 atomic units.

  15. Researches in radiation protection and safety at Moscow engineering physics institute

    International Nuclear Information System (INIS)

    Kramer-Ageev, E.A.; Lebedev, L.A.

    1994-01-01

    Department of Radiation Physics of Moscow Engineering Physics Institute is a research and teaching institution in the field of radiation protection, dosimetry, shielding and in radioecology. The scientific activity which has been doing at the department for many years includes the following directions: 1. Development of mathematical models and computational methods for an evaluation of external and internal exposure of people living on contaminated areas. Recently the computational model for forecast of internal irradiation via food chains was linked with computer geographical information systems. 2. Development of techniques and instruments for the measurements of radioactive contamination of soil, air, water and agricultural products. Department has special laboratory for this. 3. Application of computational methods to the problem of nuclear medicine. The whole body spectrometry and radiation 'coding' are used as an efficient methods of obtaining information on the radionuclides location in the human body. 4. Application of computational methods to the problem of radiation safety at nuclear power plants. It allows one to calculate radiation fields in shielding and the characteristics of nuclear wastes. (author)

  16. Investigation of the effect of radiation of DNA methylation patterns

    International Nuclear Information System (INIS)

    Kalinich, J.F.

    1986-01-01

    Four lines of cultured mammalian cells were used in this project: V79A03, a Chinese hamster lung fibroblast; HeLa S-3, an epithelial cell line from a human cervix carcinoma; CHO K-1, an epithelial cell line from a Chinese hamster ovary; and C-1300 N1E-115, a mouse neuroblastoma line. The 5-methylcytosine levels in DNA following exposure to cobalt-60 gamma radiation were measured. Induction of metallothionein in V79A03 cells and acetylcholinesterase in C-1300 N1E-115 cells after irradiation was determined and the effect of radiation on cytoplasmic and nuclear levels of DNA methyltransferase was studied and nuclear demethylase activity assayed. This study showed gamma radiation resulted in a decrease of 5-methylcytosine levels in the DNA of cultured mammalian cells. This radiation-induced hypomethylation resulted in the induction of acetylcholinesterase in mouse neuroblastoma cells and metallothionein in Chinese hamster lung fibroblasts and was caused by a decrease in DNA methyltransferase activity in the nucleus after irradiation and not by the presence of DNA demethylase

  17. Education of medical radiation physicists in the Czech Republic

    International Nuclear Information System (INIS)

    Cechak, T.; Dvorak, P.; Musilek, L.

    2005-01-01

    In this paper courses in new specialization in Medical Radiation Physics, now renamed as Dosimetry and Ionising Radiation Application realized on Czech Technical University in Prague (CTU) are described. The Department of Dosimetry and Application of Ionizing Radiation offers graduate study leading to the Ing. degree (M. S.) in Radiological Physics, bachelor study leading to the Bachelor in Radiological Technique. The Department offers furthermore graduate study leading to the Ing. degree (M. S.) in Dosimetry and Application of Ionizing Radiation and bachelor study leading to the Bachelor in Radiation Protection and Environment, traditionally . The curriculum of the Radiological Physics combines theoretical, experimental and applied radiological science courses. After graduation, students are prepared for employment as radiological physics in the departments of radiotherapy , radiodiagnostics and nuclear medicine or many continues studies leading to the PhD. In addition to pre-graduate education, CTU also intends to apply for Ministry ,of Health certification for special courses in medical physics aimed at graduates from other mathematics- and physics-based programs who wish to be employed as MPs in hospitals. This will be possible in the near future, when the new legislation becomes valid and the Institute for Postgraduate Education loses its monopoly on postgraduate education in health care. (authors)

  18. Use of dual-head gamma camera in radionuclide internal contamination monitoring on radiation workers from a nuclear medicine department

    International Nuclear Information System (INIS)

    Rodriguez-Laguna, A.; Brandan, M.E.

    2008-01-01

    As a part of an internal dosimetry program that is performed at the Mexican National Institute of Cancerology - Nuclear Medicine Department, in the present work we suggest a procedure for the routinely monitoring of internal contamination on radiation workers and nuclear medicine staff. The procedure is based on the identification and quantification of contaminating radionuclides in human body by using a dual-head whole-body gamma camera. The results have shown that the procedures described in this study can be used to implement a method to quantify minimal accumulated activity in the main human organs to evaluate internal contamination with radionuclides. The high sensitivity of the uncollimated gamma camera is advantageous for the routinely detection and identification of small activities of internal contamination. But, the null spatial resolution makes impossible the definition of contaminated region of interest. Then, the use of collimators is necessary to the quantification of incorporated radionuclides activities in the main human organs and for the internal doses assessment. (author)

  19. Investigation of the role of oncornavirus in radiation-induced osteosarcomas

    International Nuclear Information System (INIS)

    Frazier, M.E.; Park, J.F.; Jee, W.S.S.; Taylor, G.

    1975-01-01

    Viruses of the RNA tumor group are etiologic agents of spontaneously occurring neoplastic disease in a number of animal species. These oncornaviruses possess certain biochemical properties which permit them to be easily detected in infected cells, including RNA-instructed DNA polymerase (RIDP) and a closely associated 70S RNA genome in a cytoplasmic particulate fraction having a density of 1.15-1.20 g/ml. Tissues from three dogs with radiation-induced lung tumors and four dogs without tumors did not contain RIDP. However, RIDP was detected in materials prepared from five beagles with radiation-induced osteosarcomas. The presence of RIDP in these radiation-induced osteosarcomas can be considered indicative of retravirus or oncornavirus infection

  20. Radiation protection in pediatric radiology

    International Nuclear Information System (INIS)

    Fendel, H.; Stieve, F.E.

    1983-01-01

    Because of the high growth rate of cell systems in phases of radiation exposure radiological investigations on children should not be considered unless there is a strong indication. The National Council on Radiation Protection and Measurements has worked out recommendations on radiation protection which have been published as an NCRP report. This report is most important even outside the USA. The present translation is aimed to contribute to better understanding of the bases and aims of radiation protection during radiological investigations on children. It addresses not only those physicians who carry out radiological investigations on children themselves but also all physicians requiring such investigations. For these physicians, but also for parents who are worried about the radiation risk to their children the report should be a useful source of information and decision aid ensuring, on the one hand, that necessary radiological investigations are not shunned for unjustified fear of radiation and that, on the other hand, all unnecessary exposure of children to radiation is avoided. Thus, it is to be hoped, the quality of pediatric radiological diagnostics will be improved. (orig./MG) [de

  1. Experimental Investigation to Heat Transfer Augmentation in A Car Radiator Worked with (Water - Magnesium Oxide Nanofluid.

    Directory of Open Access Journals (Sweden)

    Hameed K. Hamzah

    2017-07-01

    Full Text Available In this work, effect of adding MgO nanoparticle to base fluid (water in car radiator has been implemented experimentally. In this investigation, an experimental test rig has been designed to study effect inlet temperature of nanofluid, the flow rate and nanoparticle volume fraction on heat transfer rates. Six different concentrations of nanofluid of 0.125%, 0.25%, 0.5%,1% ,1.5% and 2% have been prepared by mixed of MgO nanoparticles with water. Reynolds number of nanofluid was between 4500 and 19000.Thermal behavior of an automobile radiator worked with nanofluid has been compared with using pure water in it. So, the fluid circulating rate in radiator has been varied in the extent of the range of 1-8 L/min and fluid inlet temperature is also varied for all experimental. Results emphasized that Nusselt number increases with an increase of liquid inlet temperature, nanoparticle volume fraction and Reynolds number. As well as, the enhancement in heat transfer coefficient due to presence of nanoparticles is more than that without noanoparticles. These results can be achieved to optimize the dimension of an automobile radiator. A good agreement was seen with theoretical and experimental results with many authors

  2. DOE 2010 occupational radiation exposure

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2011-11-01

    The U.S. Department of Energy (DOE) Office of Analysis within the Office of Health, Safety and Security (HSS) publishes the annual DOE Occupational Radiation Exposure Report to provide an overview of the status of radiation protection practices at DOE.* The DOE 2010 Occupational Radiation Exposure Report provides an evaluation of DOE-wide performance regarding compliance with DOE Part 835 dose limits and as low as reasonably achievable (ALARA) process requirements. In addition, the report provides data to DOE organizations responsible for developing policies for protection of individuals from the effects of radiation. The report provides a summary and an analysis of occupational radiation exposure information from the monitoring of individuals involved in DOE activities. The occupational radiation exposure information is analyzed in terms of aggregate data, dose to individuals, and dose by site over the past 5 years.

  3. Investigation on diagnostic techniques of X-ray radiation characteristic from slit target

    International Nuclear Information System (INIS)

    Cheng Jinxiu; Miao Wenyong; Sun Kexu; Wang Hongbin; Cao Leifeng; Yang Jiamin; Chen Zhenglin

    2001-01-01

    On the Xingguang-II facility, X-ray transport process in a cavity target was simulated in a long cylindrical cavity with slits. High temporally and spatially resolved Microchannel Plate (MCP) gated X-ray picosecond frame camera and soft X-ray steak camera were used to investigate the temporal and spatial distribution of the soft X-ray emitted from the cavity wall through the slit. X-ray transport velocity, X-ray emission time and amount of intensity decay was obtained. X-ray CCD pinhole transmission grating spectrometer was used to investigate the spectrum change of the emitted X-ray versus its location. The change characteristic of the spectrum of X-ray absorbed and emitted again and again in transport was obtained. X-ray diodes and Dante spectrometer were used to measure X-ray flux and radiation temperature in the slit, the source and the transport end, respectively. The typical results in the experiment were given. A brief and essential analysis and discussion were made

  4. Synchrotron radiation

    International Nuclear Information System (INIS)

    Hallmeier, K.H.; Meisel, A.; Ranft, J.

    1982-01-01

    The physical background and the properties of synchrotron radiation are described. The radiation offers many useful applications in the fields of spectroscopy and structural investigations. Some examples are given

  5. Absorbed Doses to Embryo from Intravenous Urography at Selected Radiological Departments in Slovakia

    International Nuclear Information System (INIS)

    Karkus, R.; Nikodemova, D.; Horvathova, M.

    2003-01-01

    Actual legislation used in radiological protection requires quality assurance program for decreasing radiation load of patients from radiological examinations. The information about irradiation of pregnant women is very important, because the embryo is more radiosensitive as adult organism. On the basis of absence of unified calculations or measurements of absorbed doses to embryo from various radiological examinations in Slovakia we present in this study the values of absorbed doses to embryo from intravenous urography at selected radiological departments in Slovakia. Absorbed doses to embryo were obtained by measurement and calculation using the simulation of irradiation of pregnant woman by intravenous urography. The results of our study indicate, that absorbed doses to embryo were at various radiological departments considerably different, depending on type of X-ray machine and different settings of technical parameters of X-ray machine. In accordance with worldwide trend it is necessary to decrease radiation load of patients as low as possible level. Differences in radiation load between radiological departments indicate, that it is necessary to continue in solving of this problem and perform measurements and calculations of absorbed doses to embryo at different types of X-ray machines and at different examinations, where the embryo is in direct beam of X-ray. (author)

  6. Estimation of radiation dose received by the radiation worker during 18F FDG injection process

    International Nuclear Information System (INIS)

    Jha, Ashish Kumar; Zade, Anand; Rangarajan, Venkatesh

    2011-01-01

    The radiation dosimetric literature concerning the medical and non-medical personnel working in nuclear medicine departments are limited, particularly radiation doses received by radiation worker in nuclear medicine department during positron emission tomography (PET) radiopharmaceutical injection process. This is of interest and concern for the personnel. To measure the radiation dose received by the staff involved in injection process of Fluorine-18 Fluorodeoxyglucose (FDG). The effective whole body doses to the radiation workers involved in injections of 1511 patients over a period of 10 weeks were evaluated using pocket dosimeter. Each patient was injected with 5 MBq/kg of 18 F FDG. The 18 F-FDG injection protocol followed in our department is as follows. The technologist dispenses the dose to be injected and records the pre-injection activity. The nursing staff members then secure an intravenous catheter. The nuclear medicine physicians/residents inject the dose on a rotation basis in accordance with ALARA principle. After the injection of the tracer, the nursing staff members flush the intravenous catheter. The person who injected the tracer then measures the post-injection residual dose in the syringe. The mean effective whole body doses per injection for the staff were the following: Nurses received 1.44 ± 0.22 μSv/injection (3.71 ± 0.48 nSv/MBq), for doctors the dose values were 2.44 ± 0.25 μSv/injection (6.29 ± 0.49 nSv/MBq) and for technologists the doses were 0.61 ± 0.10 μSv/injection (1.58 ± 0.21 nSv/MBq). It was seen that the mean effective whole body dose per injection of our positron emission tomography/computed tomography (PET/CT) staff who were involved in the 18 F-FDG injection process was maximum for doctors (54.34% differential doses), followed by nurses (32.02% differential doses) and technologist (13.64% differential doses). This study confirms that low levels of radiation dose are received by staff during 18 F-FDG injection and

  7. A numerical investigation of the influence of radiation and moisture content on pyrolysis and ignition of a leaf-like fuel element

    Science.gov (United States)

    B.L. Yashwanth; B. Shotorban; S. Mahalingam; C.W. Lautenberger; David Weise

    2016-01-01

    The effects of thermal radiation and moisture content on the pyrolysis and gas phase ignition of a solid fuel element containing high moisture content were investigated using the coupled Gpyro3D/FDS models. The solid fuel has dimensions of a typical Arctostaphylos glandulosa leaf which is modeled as thin cellulose subjected to radiative heating on...

  8. An investigation of the interactions of low doses of ionising radiation and chemical pollutants on Artemia Salina

    International Nuclear Information System (INIS)

    Danova, D.; Benova, K.; Hromada, R.; Falis, M.; Dvorak, P.

    2004-01-01

    Nuclear reactor failures present a risk of global contamination which can be affected by other environmental factors, such as chemicals. The present study has investigated the effect of low doses of gamma radiation in relation to the presence of low doses of Cr and Cd. (authors)

  9. Department of Training and Consulting: Overview

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    2000-01-01

    Full text: The educational activities, started in 1998 were successfully continued. About 1000 pupils, age 15 - 20, from high schools and students of various universities from all over Poland visited our Centre of Education and Information (bldg. 67) where the exhibition ''Nuclear wastes: problems, solutions'' is displayed. In addition to the problems specific to nuclear wastes, the visits offer special chance to talk about more general questions connected with environmental radioactivity, radiation risks as well as very basis of the atomic and nuclear radiation. Our staff also helps the pupils (and their teachers as well) visit the most important experimental sites at SINS. In addition to our permanent interest in education on the level of secondary school, the Department organised series of courses which belonged to the continuous education of some professional groups. About 150 officers of the Boarder Guard from all over Poland were trained in the basis of radiological protection, dosimetry and rules which govern the transport of radioactive materials. Almost the same problems were of interest to a group from Polish airline company LOT-CARGO. Another course, which concerned the production of radiopharmaceuticals for nuclear medicine and problems of radiation field in which the mankind lives, was organised for about 70 technicians of nuclear medicine. Last but not least, a new educational program in the high schools caused an interest of the chemistry teachers in the physics and chemistry of radioactive materials. We had the pleasure to organise appropriate course for a group of about 26 teachers from one of Polish counties (siedleckie). One can also mention that a group of 60 students from the University of Warsaw (Interfaculty Study of Environmental Protection) finished training in ecoradiology, which started in 1998. Step by step, in spite of more or less permanent lack of appropriate funds, the Department completes some educational experimental units which

  10. System of laser pump and synchrotron radiation probe microdiffraction to investigate optical recording process

    Energy Technology Data Exchange (ETDEWEB)

    Yasuda, Nobuhiro; Fukuyama, Yoshimitsu; Osawa, Hitoshi [Research and Utilization Division, Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan); Kimura, Shigeru [Research and Utilization Division, Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan); Japan Science and Technology Agency, CREST, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075 (Japan); Ito, Kiminori; Tanaka, Yoshihito [RIKEN SPring-8 Center, RIKEN, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148 (Japan); Matsunaga, Toshiyuki; Kojima, Rie; Hisada, Kazuya; Tsuchino, Akio; Birukawa, Masahiro [R and D Division, Panasonic Corporation, 3-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0237 (Japan); Yamada, Noboru [Department of Materials Science and Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, Kyoto 606-8501 (Japan); Sekiguchi, Koji; Fujiie, Kazuhiko; Kawakubo, Osamu [Advanced Optical Storage Development Department, Advanced Device Technology Platform, Sony Corporation, 4-14-1 Asahi-cho, Atsugi, Kanagawa 243-0014 (Japan); Takata, Masaki [Research and Utilization Division, Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan); RIKEN SPring-8 Center, RIKEN, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148 (Japan); Department of Advanced Materials Science, School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561 (Japan)

    2013-06-15

    We have developed a system of laser-pump and synchrotron radiation probe microdiffraction to investigate the phase-change process on a nanosecond time scale of Ge{sub 2}Sb{sub 2}Te{sub 5} film embedded in multi-layer structures, which corresponds to real optical recording media. The measurements were achieved by combining (i) the pump-laser system with a pulse width of 300 ps, (ii) a highly brilliant focused microbeam with wide peak-energy width ({Delta}E/E {approx} 2%) made by focusing helical undulator radiation without monochromatization, and (iii) a precise sample rotation stage to make repetitive measurements. We successfully detected a very weak time-resolved diffraction signal by using this system from 100-nm-thick Ge{sub 2}Sb{sub 2}Te{sub 5} phase-change layers. This enabled us to find the dependence of the crystal-amorphous phase change process of the Ge{sub 2}Sb{sub 2}Te{sub 5} layers on laser power.

  11. Expanding the scope of practice for radiology managers: radiation safety duties.

    Science.gov (United States)

    Orders, Amy B; Wright, Donna

    2003-01-01

    In addition to financial responsibilities and patient care duties, many medical facilities also expect radiology department managers to wear "safety" hats and complete fundamental quality control/quality assurance, conduct routine safety surveillance in the department, and to meet regulatory demands in the workplace. All managers influence continuous quality improvement initiatives, from effective utilization of resource and staffing allocations, to efficacy of patient scheduling tactics. It is critically important to understand continuous quality improvement (CQI) and its relationship with the radiology manager, specifically quality assurance/quality control in routine work, as these are the fundamentals of institutional safety, including radiation safety. When an institution applies for a registration for radiation-producing devices or a license for the use of radioactive materials, the permit granting body has specific requirements, policies and procedures that must be satisfied in order to be granted a permit and to maintain it continuously. In the 32 U.S. Agreement states, which are states that have radiation safety programs equivalent to the Nuclear Regulatory Commission programs, individual facilities apply for permits through the local governing body of radiation protection. Other states are directly licensed by the Nuclear Regulatory Commission and associated regulatory entities. These regulatory agencies grant permits, set conditions for use in accordance with state and federal laws, monitor and enforce radiation safety activities, and audit facilities for compliance with their regulations. Every radiology department and associated areas of radiation use are subject to inspection and enforcement policies in order to ensure safety of equipment and personnel. In today's business practice, department managers or chief technologists may actively participate in the duties associated with institutional radiation safety, especially in smaller institutions, while

  12. Radiation-emitting Electronic Product Codes

    Data.gov (United States)

    U.S. Department of Health & Human Services — This database contains product names and associated information developed by the Center for all products, both medical and non-medical, which emit radiation. It...

  13. COOP Wind and Radiation Observations

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Wind and radiation data from stations in the National Weather Service Cooperative Observers Network. Some precipitation and pressure forms are mistakenly placed in...

  14. National pattern for the realization of the unit of the dose speed absorbed in air for beta radiation. (Method: Ionometer, cavity of Bragg-Gray implemented in an extrapolation chamber with electrodes of variable separation, exposed to a field of beta radiation of 90Sr/90Y)

    International Nuclear Information System (INIS)

    Alvarez R, M. T.; Morales P, J. R.

    2001-01-01

    From the year of 1987 the Department of Metrology of the ININ, in their Secondary Laboratory of Calibration Dosimetric, has a patron group of sources of radiation beta and an extrapolation chamber of electrodes of variable separation.Their objective is to carry out of the unit of the dose speed absorbed in air for radiation beta. It uses the ionometric method, cavity Bragg-Gray in the extrapolation chamber with which it counts. The services that offers are: i) it Calibration : Radioactive Fuentes of radiation beta, isotopes: 90 Sr/ 90 Y; Ophthalmic applicators 9 0 S r/ 90 Y; Instruments for detection of beta radiation with to the radiological protection: Ionization chambers, Geiger-Muller, etc.; Personal Dosemeters. ii) Irradiation with beta radiation of materials to the investigation. (Author)

  15. Monitoring System For Improving Radiation Safety Management

    International Nuclear Information System (INIS)

    Osovizky, A.; Paran, J.; Tal, N.; Ankry, N.; Ashkenazi, B.; Tirosh, D.; Marziano, R.; Chisin, R.

    1999-01-01

    Medi SMARTS (Medical Survey Mapping Automatic Radiation Tracing System), a gamma radiation monitoring system, was installed in a nuclear medicine department. In this paper the evaluation of the system's ability to improve radiation safety management is presented. The system is based on a state of the art software that continuously collects on line radiation measurements for display, analysis and logging. Radiation is measured by GM tubes; the signal is transferred to a data processing unit and then via an RS-485 communication line to a computer. The system automatically identifies the detector type and its calibration factor, thus providing compatibility, maintainability and versatility when changing detectors. Radiation levels are displayed on the nuclear medicine department map at six locations. The system has been operating continuously for more than one year, documenting abnormal events caused by routine operation or failure incidents. In cases where abnormal working conditions were encountered, an alarm message was sent automatically to the supervisor via his tele-pager. An interesting issue observed during the system evaluation, was the inability to distinguish between high radiation levels caused by proper routine operation and those caused by safety failure incidents. The solution included examination of two parameters, radiation levels as well as their duration period. A careful analysis of the historical data, applying the appropriated combined parameters determined for each location, verified that such a system can identify abnormal events, provide alarms to warn in case of incidents and improve standard operating procedures

  16. Department of Radiation and Environmental Biology - Overview

    International Nuclear Information System (INIS)

    Cebulska-Wasilewska, A.

    2000-01-01

    Full text:The year 1999 we devoted mainly to the activities concerning our basic research, and requirements and expectations of three research projects. The environmental project from the European Community was supporting our research in the issues of human monitoring of occupational exposure to pesticides. The two other radiobiology projects from the State Committee of Research were supporting our search on the biological efficiency and its enhancement of radio-therapeutic sources of various LET radiation. We succeeded fruitful co-operation with colleagues from Academy of Mining and Metallurgy that let us go faster with modernization of our laboratory by automation of our methods for