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Sample records for radiation laboratory accreitation

  1. Secondary calibration laboratory for ionizing radiation laboratory accreitation program National Institute of Standards and Technology National Voluntary Laboratory Accreditation Program

    Energy Technology Data Exchange (ETDEWEB)

    Martin, P.R.

    1993-12-31

    This paper presents an overview of the procedures and requirements for accreditation under the Secondary Calibration Laboratory for Ionizing Radiation Program (SCLIR LAP). The requirements for a quality system, proficiency testing and the onsite assessment are discussed. The purpose of the accreditation program is to establish a network of secondary calibration laboratories that can provide calibrations traceable to the primary national standards.

  2. Secondary calibration laboratory for ionizing radiation laboratory accreitation program National Institute of Standards and Technology National Voluntary Laboratory Accreditation Program

    International Nuclear Information System (INIS)

    Martin, P.R.

    1993-01-01

    This paper presents an overview of the procedures and requirements for accreditation under the Secondary Calibration Laboratory for Ionizing Radiation Program (SCLIR LAP). The requirements for a quality system, proficiency testing and the onsite assessment are discussed. The purpose of the accreditation program is to establish a network of secondary calibration laboratories that can provide calibrations traceable to the primary national standards

  3. NASA Space Radiation Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The NASA Space Radiation Laboratory (NSRL) at Brookhaven National Laboratory is a NASA funded facility, delivering heavy ion beams to a target area where scientists...

  4. Radiation detectors laboratory

    International Nuclear Information System (INIS)

    Ramirez J, F.J.

    1996-01-01

    The National Institute for Nuclear Research has established a Radiation detector laboratory that has the possibility of providing to the consultants on the handling and applications of the nuclear radiation detectors. It has special equipment to repair the radiation detectors used in spectroscopy as the hyper pure Germanium for gamma radiation and the Lithium-silica for X-rays. There are different facilities in the laboratory that can become useful for other institutions that use radiation detectors. This laboratory was created to satisfy consultant services, training and repairing of the radiation detectors both in national and regional levels for Latin America. The laboratory has the following sections: Nuclear Electronic Instrumentation; where there are all kind of instruments for the measurement and characterization of detectors like multichannel analyzers of pulse height, personal computers, amplifiers and nuclear pulse preamplifiers, nuclear pulses generator, aleatories, computer programs for radiation spectra analysis, etc. High vacuum; there is a vacuum escape measurer, two high vacuum pumps to restore the vacuum of detectors, so the corresponding measurers and the necessary tools. Detectors cleaning; there is an anaerobic chamber for the detectors handling at inert atmosphere, a smoke extraction bell for cleaning with the detector solvents. Cryogenic; there are vessels and tools for handling liquid nitrogen which is used for cooling the detectors when they required it. (Author)

  5. Radiation detectors laboratory

    International Nuclear Information System (INIS)

    Ramirez J, F.J.

    1997-01-01

    The Radiation detectors laboratory was established with the assistance of the International Atomic Energy Agency which gave this the responsibility to provide its services at National and regional level for Latin America and it is located at the ININ. The more expensive and delicate radiation detectors are those made of semiconductor, so it has been put emphasis in the use and repairing of these detectors type. The supplied services by this laboratory are: selection consultant, detectors installation and handling and associated systems. Installation training, preventive and corrective maintenance of detectors and detection systems calibration. (Author)

  6. Radiation carcinogenesis, laboratory studies

    International Nuclear Information System (INIS)

    Shellabarger, C.J.

    1974-01-01

    Laboratory studies on radioinduced carcinogenesis are reviewed. Some topics discussed are: radioinduced neoplasia in relation to life shortening; dose-response relationships; induction of skin tumors in rats by alpha particles and electrons; effects of hormones on tumor response; effects of low LET radiations delivered at low dose-rates; effects of fractionated neutron radiation; interaction of RBE and dose rate effects; and estimates of risks for humans from animal data. (U.S.)

  7. Virtual laboratory for radiation experiments

    International Nuclear Information System (INIS)

    Tiftikci, A.; Kocar, C.; Tombakoglu, M.

    2009-01-01

    Simulation of alpha, beta and gamma radiation detection and measurement experiments which are part of real nuclear physics laboratory courses was realized with Monte Carlo method and JAVA Programming Language. As being known, establishing this type of laboratories are very expensive. At the same time, highly radioactive sources used in some experiments carries risk for students and also for experimentalists. By taking into consideration of those problems, the aim of this study is to setup a virtual radiation laboratory with minimum cost and to speed up the training of radiation physics for students with no radiation risk. Software coded possesses the nature of radiation and radiation transport with the help of Monte Carlo method. In this software, experimental parameters can be changed manually by the user and experimental results can be followed synchronous in an MCA (Multi Channel Analyzer) or an SCA (Single Channel Analyzer). Results obtained in experiments can be analyzed by these MCA or SCA panels. Virtual radiation laboratory which is developed in this study with reliable results and unlimited experimentation capability seems as an useful educational material. Moreover, new type of experiments can be integrated to this software easily and as a result, virtual laboratory can be extended.

  8. Laboratory operation during radiation emergency

    International Nuclear Information System (INIS)

    Bunata, M.; Prouza, Z.; Tecl, J.

    2009-01-01

    During radiation emergency, a special operation mode of laboratories of the Radiation Monitoring Network (hereinafter RMN) is expected. The principal factors differing the emergency mode from the normal one are the following: - significantly higher amount of analyzed samples; - high activities of the majority of the samples; - higher risk of personal and equipment contamination; - higher working and psychological demands on laboratory staff. The assuring of the radiation protection requirements of laboratory staff has to be the primary objective, nevertheless the risk of equipment contamination and of samples cross- contamination of course have to be as well taken into consideration. The presentation describes the experience of the RMN Central Laboratory of the National Radiation Protection Institute in Prague (SURO) which was obtained during realization of field tests, in which a radioactive matter was released. These tests allow us to evaluate the source term or radioactivity dispersal balance based on various detection methods with the aim to estimate exposure of the afflicted persons. Tests provided to simulate emergency working conditions in Central Laboratory - high number of contaminated samples, which have to be analyzed in a short time (short half-time of used radionuclide 99m Tc) using sophisticated laboratory techniques (gamma spectrometers, aerosols collectors, etc.). The testing shows the availability of the SURO laboratory to work during the radiation emergency and to participate on its determination. The suitable settings and the ideal number of staff have been found. The average analysis time was approximately 1 minute per sample and the sample results were available just a few minutes after the counting. Moreover, the settings avoided any danger and kept both the crew and the samples safe and secure from contamination. (authors)

  9. Laboratory operation during radiation emergency

    International Nuclear Information System (INIS)

    Bunata, M.; Tecl, J.; Prouza, Z.

    2008-01-01

    During radiation emergency, a special operation mode of laboratories of the Radiation Monitoring Network (hereinafter RMN) is expected. The principal factors differing the emergency mode from the normal one are the following: - significantly higher amount of analyzed samples; - high activities of the majority of the samples; - higher risk of personal and equipment contamination; - higher working and psychological demands on laboratory staff. The assuring of the radiation protection requirements of laboratory staff has to be the primary objective, nevertheless the risk of equipment contamination and of samples cross- contamination of course have to be as well taken into consideration. The presentation describes the experience of the RMN Central Laboratory of the National Radiation Protection Institute in Prague (SURO) which was obtained during realization of field tests, in which a radioactive matter was released. These tests allow us to evaluate the source term or radioactivity dispersal balance based on various detection methods with the aim to estimate exposure of the afflicted persons. Tests provided to simulate emergency working conditions in Central Laboratory -high number of contaminated samples, which have to be analyzed in a short time (short half-time of used radionuclide 99m Tc) using sophisticated laboratory techniques (gamma spectrometers, aerosols collectors, etc.). The testing shows the availability of the SURO laboratory to work during the radiation emergency and to participate on its determination. The suitable settings and the ideal number of staff have been found. The average analysis time was approximately 1 minute per sample and the sample results were available just a few minutes after the counting. Moreover, the settings avoided any danger and kept both the crew and the samples safe and secure from contamination. (authors)

  10. LAWRENCE RADIATION LABORATORY COUNTING HANDBOOK

    Energy Technology Data Exchange (ETDEWEB)

    Group, Nuclear Instrumentation

    1966-10-01

    The Counting Handbook is a compilation of operational techniques and performance specifications on counting equipment in use at the Lawrence Radiation Laboratory, Berkeley. Counting notes have been written from the viewpoint of the user rather than that of the designer or maintenance man. The only maintenance instructions that have been included are those that can easily be performed by the experimenter to assure that the equipment is operating properly.

  11. Radiation safety requirements for radionuclide laboratories

    International Nuclear Information System (INIS)

    1993-01-01

    In accordance with the section 26 of the Finnish Radiation Act (592/91) the safety requirements to be taken into account in planning laboratories and other premises, which affect safety in the use of radioactive materials, are confirmed by the Finnish Centre for Radiation and Nuclear Safety. The guide specifies the requirements for laboratories and storage rooms in which radioactive materials are used or stored as unsealed sources. There are also some general instructions concerning work procedures in a radionuclide laboratory

  12. Conception of CTMSP ionizing radiation calibration laboratory

    International Nuclear Information System (INIS)

    Silva, Raimundo Dias da; Kibrit, Eduardo

    2009-01-01

    The present paper describes the implantation process of an ionizing radiation calibration laboratory in a preexistent installation in CTMSP (bunker) approved by CNEN to operate with gamma-ray for non destructive testing. This laboratory will extend and improve the current metrological capacity for the attendance to the increasing demand for services of calibration of ionizing radiation measuring instruments. Statutory and regulatory requirements for the licensing of the installation are presented and deeply reviewed. (author)

  13. National Laboratory of Synchrotron Radiation: technologic potential

    International Nuclear Information System (INIS)

    Silva, C.E.T.G. da; Rodrigues, A.R.D.

    1987-01-01

    The technological or industrial developments based on the accumulated experience by research group of condensed matter physics, in Brazil, are described. The potential of a National Laboratory of Synchrotron Radiation for personnel training, absorption and adaptation of economically important technologies for Brazil, is presented. Examples of cooperations between the Laboratory and some national interprises, and some industrial applications of the synchrotron radiation are done. (M.C.K.) [pt

  14. Radiation hydrodynamics in the laboratory

    International Nuclear Information System (INIS)

    1985-12-01

    This report contains a collection of five preprints devoted to the subject of laser induced phenomena of radiation hydrodynamics. These preprints cover approximately the contents of the presentations made by the MPQ experimental laser-plasma group at the 17th European Conference on Laser Interaction with Matter (ECLIM), Rome, November 18-22, 1985. (orig.)

  15. Code of practice for safety in laboratory - non ionising radiation

    International Nuclear Information System (INIS)

    Ramli Jaya; Mohd Yusof Mohd Ali; Khoo Boo Huat; Khatijah Hashim

    1995-01-01

    The code identifies the non-ionizing radiation encountered in laboratories and the associated hazards. The code is intended as a laboratory standard reference document for general information on safety requirements relating to the usage of non-ionizing radiations in laboratories. The nonionizing radiations cover in this code, namely, are ultraviolet radiation, visible light, radio-frequency radiation, lasers, sound waves and ultrasonic radiation. (author)

  16. Occupational radiation exposures in research laboratories

    International Nuclear Information System (INIS)

    Vaccari, S.; Papotti, E.; Pedrazzi, G.

    2006-01-01

    Radioactive sources are widely used in many research activities at University centers. In particular, the activities concerning use of sealed form ( 57 Co in Moessbauer application) and unsealed form ( 3 H, 14 C, 32 P in radioisotope laboratories) are analyzed. The radiological impact of these materials and potential effective doses to researchers and members of the public were evaluated to show compliance with regulatory limits. A review of the procedures performed by researchers and technicians in the research laboratories with the relative dose evaluations is presented in different situations, including normal operations and emergency situations, for example the fire. A study of the possible exposure to radiation by workers, restricted groups of people, and public in general, as well as environmental releases, is presented. (authors)

  17. Occupational radiation exposures in research laboratories

    Energy Technology Data Exchange (ETDEWEB)

    Vaccari, S.; Papotti, E. [Parma Univ., Health Physics (Italy); Pedrazzi, G. [Parma Univ., Dept. of Public Health (Italy)

    2006-07-01

    Radioactive sources are widely used in many research activities at University centers. In particular, the activities concerning use of sealed form ({sup 57}Co in Moessbauer application) and unsealed form ({sup 3}H, {sup 14}C, {sup 32}P in radioisotope laboratories) are analyzed. The radiological impact of these materials and potential effective doses to researchers and members of the public were evaluated to show compliance with regulatory limits. A review of the procedures performed by researchers and technicians in the research laboratories with the relative dose evaluations is presented in different situations, including normal operations and emergency situations, for example the fire. A study of the possible exposure to radiation by workers, restricted groups of people, and public in general, as well as environmental releases, is presented. (authors)

  18. Research Laboratory of Mixed Radiation Dosimetry

    International Nuclear Information System (INIS)

    2002-01-01

    Full text: Two main topics of the research work in the Laboratory of Mixed Radiation Dosimetry in 2001 were: development of recombination methods for dosimetry of mixed radiation fields and maintenance and development of unique in Poland reference neutron fields. Additionally research project on internal dosimetry were carried out in collaboration with Division of Radiation Protection Service. RECOMBINATION METHODS Recombination methods make use of the fact that the initial recombination of ions in the gas cavity of the ionization chamber depends on local ionization density. The later can be related to linear energy transfer (LET) and provides information on radiation quality of the investigated radiation fields. Another key feature of the initial recombination is that it does not depend of dose rate. Conditions of initial (local) recombination can be achieved in specially designed high pressure tissue-equivalent ionization chambers, called the recombination chambers. They are usually parallel-plate ionization chambers filled with a tissue-equivalent gas mixture under a pressure of order 1 MPa. The spacing between electrodes is of order of millimeters. At larger spacing, the volume recombination limits the maximum dose rate at which the chamber can be properly operated. The output of the chamber is the ionization current (or collected charge) as a function of collecting voltage. All the recombination methods require the measurement of the ionization current (or charge) at least at two values of the collecting voltage applied to the chamber. The highest voltage should provide the conditions close to saturation (but below discharge or multiplication). The ionization current measured at maximum applied voltage is proportional to the absorbed dose, D, (some small corrections for lack of saturation can be introduced when needed). Measurements at other voltages are needed for the determination of radiation quality. The total dose equivalent in a mixed radiation field is

  19. Review of radiation safety in the cardiac catheterization laboratory

    International Nuclear Information System (INIS)

    Johnson, L.W.; Moore, R.J.; Balter, S.

    1992-01-01

    With the increasing use of coronary arteriography and interventional procedures, radiation exposure to patients and personnel working in cardiac catheterization laboratories has increased. Proper technique to minimize both patient and operator exposure is necessary. A practical approach to radiation safety in the cardiac catheterization laboratory is presented. This discussion should be useful to facilities with well-established radiation safety programs as well as facilities that require restructuring to cope with the radiation environment in a modern cardiac catheterization laboratory

  20. Characteristics of the radiation prevention metrology laboratory 'Cajavec' - Banjaluka

    International Nuclear Information System (INIS)

    Tomljenovic, I.; Ninkovic, M.; Kolonic, Dz.

    2004-01-01

    Radiation metrology laboratory built in the factory 'Cajavec' in Banja Luka, planed for gauge the detectors of ionization radiation. Laboratory as part of the large factory building , thus projected and formed according to positive radiation principles. Walls are constructed of basic concrete, main entrance of lead, approaching the radiation bench from the back side. Sound and light signal system connected with dosemeter for showing mini dose of radiation creating conditions for safe work of the dosemeterists. (author) [sr

  1. Radiation protection in clinical chemical laboratories

    International Nuclear Information System (INIS)

    Jacob, K.

    1980-01-01

    In the clinical-chemical laboratory, the problems of the personal radiation protection can be handled relatively simply. Important conditions are certain requirements as far as the building is concerned and the keeping to protection measures to invoid ingestion, inhalation, and resorption of open radioactive substances. Very intensive attention must be paid to a clean working technique in order to be able to exclude the danger of contamination which is very disturbing during the extremely sensitive measurements. The higgest problem in the handling of open radioactive substances, however, is in our opinion the waste management because it requires which space and personnel this causing high costs. Furthermore, since 1 January 1979, the permission for the final storage of radioactive waste in the shut down mine ASSE was taken back from the county collection places and it cannot be said yet if and when this permission will be given again. (orig./HP) [de

  2. 1994 activity report: Stanford Synchrotron Radiation Laboratory

    International Nuclear Information System (INIS)

    Cantwell, K.; Dunn, L.

    1994-01-01

    The SSRL facility delivered 89% of the scheduled user beam to 25 experimental stations during 6.5 months of user running. Users from private industry were involved in 31% of these experiments. The SPEAR accelerator ran very well with no major component failures and an unscheduled down time of only 2.9%. In addition to this increased reliability, there was a significant improvement in the stability of the beam. The enhancements to the SPEAR orbit as part of a concerted three-year program were particularly noticeable to users. The standard deviation of beam movement (both planes) in the last part of the run was 80 microns, major progress toward the ultimate goal of 50-micron stability. This was a significant improvement from the previous year when the movement was 400 microns in the horizontal and 200 microns in the vertical. A new accelerator Personal Protection System (PPS), built with full redundancy and providing protection from both radiation exposure and electrical hazards, was installed in 1994. It is not possible to describe in this summary all of the scientific experimentation which was performed during the run. However, the flavor of current research projects and the many significant accomplishments can be realized by the following highlights: A multinational collaboration performed several experiments involving x-ray scattering from nuclear resonances; Studies related to nuclear waste remediation by groups from Los Alamos National Laboratory and Pacific Northwest Laboratories continued in 1994; Diffraction data sets for a number of important protein crystals were obtained; During the past two years a collaboration consisting of groups from Hewlett Packard, Intel, Fisons Instruments and SSRL has been exploring the utility of synchrotron radiation for total reflection x-ray fluorescence (TRXRF); and High-resolution angle-resolved photoemission experiments have continued to generate exciting new results from highly correlated and magnetic materials

  3. 1994 activity report: Stanford Synchrotron Radiation Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Cantwell, K.; Dunn, L. [eds.

    1994-01-01

    The SSRL facility delivered 89% of the scheduled user beam to 25 experimental stations during 6.5 months of user running. Users from private industry were involved in 31% of these experiments. The SPEAR accelerator ran very well with no major component failures and an unscheduled down time of only 2.9%. In addition to this increased reliability, there was a significant improvement in the stability of the beam. The enhancements to the SPEAR orbit as part of a concerted three-year program were particularly noticeable to users. The standard deviation of beam movement (both planes) in the last part of the run was 80 microns, major progress toward the ultimate goal of 50-micron stability. This was a significant improvement from the previous year when the movement was 400 microns in the horizontal and 200 microns in the vertical. A new accelerator Personal Protection System (PPS), built with full redundancy and providing protection from both radiation exposure and electrical hazards, was installed in 1994. It is not possible to describe in this summary all of the scientific experimentation which was performed during the run. However, the flavor of current research projects and the many significant accomplishments can be realized by the following highlights: A multinational collaboration performed several experiments involving x-ray scattering from nuclear resonances; Studies related to nuclear waste remediation by groups from Los Alamos National Laboratory and Pacific Northwest Laboratories continued in 1994; Diffraction data sets for a number of important protein crystals were obtained; During the past two years a collaboration consisting of groups from Hewlett Packard, Intel, Fisons Instruments and SSRL has been exploring the utility of synchrotron radiation for total reflection x-ray fluorescence (TRXRF); and High-resolution angle-resolved photoemission experiments have continued to generate exciting new results from highly correlated and magnetic materials.

  4. Solar Radiation Research Laboratory | Energy Systems Integration Facility |

    Science.gov (United States)

    Solar Radiation Research Laboratory (SRRL) has been collecting continuous measurements of basic solar continuous operation. More than 75 instruments contribute to the Baseline Measurement System by recording

  5. Activity report of Synchrotron Radiation Laboratory 2005

    International Nuclear Information System (INIS)

    2006-11-01

    Since 1980s, the Synchrotron Radiation Laboratory (SRL) has been promoting the 'Super-SOR' project, the new synchrotron radiation facility dedicated to sciences in vacuum ultraviolet and soft X-ray regions. The University of Tokyo considered the project as one of the most important future academic plans and strongly endorsed to construct the new facility with an electron storage ring of third generation type in the Kashiwa campus. During last year, the design of the accelerator system was slightly modified to obtain stronger support of the people in the field of bio-sciences, such as medicine, pharmacy, agriculture, etc. The energy of the storage ring was increased to 2.4 GeV, which is determined to obtain undulator radiation with sufficient brightness in X-ray region for the protein crystallography experiments. The value was also optimised to avoid considerable degradation of undulator radiation in the VUV and soft X-ray regions. However, in October last year, the president office of the University found out that the promotion of the project was very difficult for financial reasons. The budget for the new facility project is too big to be supported by a single university. The decision was intensively discussed by the International Review Committee on the Institute for Solid State Physics (ISSP), which was held at ISSP from November 14 to 16. The committee understood that the restructuring of the University system in Japan would overstrain the financial resources of the University of Tokyo and accepted the decision by the University. Presently, SRL has inclined to install beamlines using undulator radiation in other SR facilities instead of constructing a facility with a light source accelerator. At new beamlines, SRL will promote advanced materials sciences utilizing high brilliance and small emittance of synchrotron radiation which have been considered in the Super-SOR project. They are those such as microscopy and time-resolved experiments, which will only be

  6. Activity report of Synchrotron Radiation Laboratory 2001

    International Nuclear Information System (INIS)

    2002-11-01

    After moved from Tanashi to Kashiwa Campus in the spring of 2000, the Synchrotron Radiation Laboratory (SRL) has been promoting the High-brilliance Light Source project, Super SOR project, in cooperation with the nationwide user group as well as with the users of the University of Tokyo. In May of 2001, the project has met with a dramatic progress. The Ministry of Education, Science, Sports and Culture organized the Advisory Board and started to discuss the future synchrotron radiation facilities in EUV and SX regime in Japan. Based on extensive discussion, they proposed the new facility consisting of a 1.8 GeV storage ring of 3rd generation type. The University of Tokyo approved to construct the proposed facility in the Kashiwa campus. The plan is supported not only by researchers in academic institutions but also bio- and chemical-industries. We strongly hope the plan will be realized in near future. On the other hand, SRL maintains a branch laboratory in the Photon Factory (PF) High Energy Accelerator Research Organization (KEK) at Tsukuba with a Revolver undulator, two beamlines and three experimental stations (BL-18A, 19A and 19B), which are and fully opened to the outside users. In the fiscal year of 2001, the operation time of the beamlines was more than 5000 hours and the number of the users was about 200. The main scientific interests and activities in the SRL at KEK-PF are directed to the electronic structures of new materials with new transport, magnetic and optical properties. The electronic structures of solid surfaces and interfaces are also intensively studied by photoelectron spectroscopy and photoelectron microscopy. The accelerator group of SRL is carrying out research works of the accelerator physics and developing the accelerator-related technology, many parts of which will be directly applied to the new light source project. This report contains the activities of the staff members of SRL and users of the three beamlines in FY2001. The status of

  7. Radiation safety requirements for radionuclide laboratories

    International Nuclear Information System (INIS)

    2000-01-01

    The guide lays down the requirements for laboratories and storage rooms in which radioactive substances are used or stored as unsealed sources. In addition, some general instructions concerning work in radionuclide laboratories are set out

  8. Radiation safety requirements for radionuclide laboratories

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    The guide lays down the requirements for laboratories and storage rooms in which radioactive substances are used or stored as unsealed sources. In addition, some general instructions concerning work in radionuclide laboratories are set out.

  9. Radiation and Health Technology Laboratory Capabilities

    Energy Technology Data Exchange (ETDEWEB)

    Goles, Ronald W.; Johnson, Michelle Lynn; Piper, Roman K.; Peters, Jerry D.; Murphy, Mark K.; Mercado, Mike S.; Bihl, Donald E.; Lynch, Timothy P.

    2003-07-15

    The Radiological Standards and Calibrations Laboratory, a part of Pacific Northwest National Laboratory (PNNL)(a) performs calibrations and upholds reference standards necessary to maintain traceability to national standards. The facility supports U.S. Department of Energy (DOE) programs at the Hanford Site, programs sponsored by DOE Headquarters and other federal agencies, radiological protection programs at other DOE and commercial nuclear sites and research and characterization programs sponsored through the commercial sector. The laboratory is located in the 318 Building of the Hanford Site's 300 Area. The facility contains five major exposure rooms and several laboratories used for exposure work preparation, low-activity instrument calibrations, instrument performance evaluations, instrument maintenance, instrument design and fabrication work, thermoluminescent and radiochromic Dosimetry, and calibration of measurement and test equipment (M&TE). The major exposure facilities are a low-scatter room used for neutron and photon exposures, a source well room used for high-volume instrument calibration work, an x-ray facility used for energy response studies, a high-exposure facility used for high-rate photon calibration work, a beta standards laboratory used for beta energy response studies and beta reference calibrations and M&TE laboratories. Calibrations are routinely performed for personnel dosimeters, health physics instrumentation, photon and neutron transfer standards alpha, beta, and gamma field sources used throughout the Hanford Site, and a wide variety of M&TE. This report describes the standards and calibrations laboratory.

  10. Light source for synchrotron radiation x-ray topography study at Beijing Synchrotron Radiation Laboratory (BSRL)

    International Nuclear Information System (INIS)

    Zhao Jiyong; Jiang Jianhua; Tian Yulian

    1992-01-01

    Characteristics of the synchrotron radiation source for X-ray topography study at Beijing Synchrotron Radiation Laboratory (BSRL) is described, local geometrical resolution of topographies is discussed, and the diffracting intensities of white beam topography is given

  11. Radiation monitoring programme in a university hot laboratory

    International Nuclear Information System (INIS)

    Tillander, M.; Heinonen, O.J.

    1979-01-01

    The Department of Radiochemistry in the University of Helsinki is the only institute teaching radiochemistry at the university level in Finland. The research programme of the Deparment must therefore include the uses of radiation and radionuclides in many branches of science. The students must receive adequate instruction in radiation protection for safe work in laboratories. This also has the educational benefit that the radiochemists will subsequently be able to observe the necessary safety precautions when employing ionizing radiation professionally. The Department of Radiochemistry consists of the following laboratories: a radiotracer laboratory, a neutron/electron and a gamma irradiation laboratory, an environmental low activity level laboratory, a whole-body counting laboratory, a reactor chemistry laboratory and a waste-treatment facility. The radiation protection organization of the Department is presented. Various methods of monitoring, including advantages and disadvantages are discussed. Emphasis is placed on the reactor chemistry laboratory where transuranic elements are utilized. These elements are highly radiotoxic and their monitoring in most cases requires destructive analysis. Different methods of determining external and internal doses are evaluated with regard to sensitivity and accuracy. Detection limits for radionuclides utilized in the laboratory are presented for different measurement systems, including non-destructive monitoring, spectrometry after chemical analysis, liquid scintillation counting and low-energy gamma spectrometry using a CsI-NaI scintillation detector. The guidelines laid down in the IAEA Safety Series Manuals are discussed in the light of practical experience. (author)

  12. Waste water management in radiation medicine laboratories

    International Nuclear Information System (INIS)

    Song Miaofa

    1990-01-01

    A new building has been used since 1983 in the department of radiation medicine of Suzhou Medical College. Management, processing facilities, monitoring, discharge and treatment of 147 Pm contaminated waste water are reported

  13. Standards in radiation protection at the IAEA Dosimetry Laboratory

    International Nuclear Information System (INIS)

    Czap, L.; Pernicka, F.; Matscheko, G.; Andreo, P.

    1999-01-01

    Approximately 90% of the Secondary Standard Dosimetry Laboratories (SSDLs) provide users with calibrations of radiation protection instruments, and the Agency is making every necessary effort to insure that SSDLs measurements in radiation protection are traceable to Primary Standards. The IAEA provides traceable calibrations of ionization chambers in terms of air kerma at radiation protection levels and ambient dose equivalent calibrations. SSDLs are encouraged to use the calibrations available from the Agency to provide traceability for their radiation protection measurements. Measurements on diagnostic X ray generators have become increasingly important in radiation protection and some SSDLs are involved in such measurements. The IAEA has proper radiation sources available to provide traceable calibrations to the SSDLs in this field, including an X ray unit specifically for mammography dedicated to standardization procedures. The different photon beam qualities and calibration procedures available in the Agency's Dosimetry Laboratory will be described. (author)

  14. National Laboratory of Ionizing Radiation Metrology - Brazilian CNEN

    International Nuclear Information System (INIS)

    1992-01-01

    The activities of the Brazilian National Laboratory of Ionizing Radiations Metrology are described. They include research and development of metrological techniques and procedures, the calibration of area radiation monitors, clinical dosemeters and other instruments and the preparation and standardization of reference radioactive sources. 4 figs., 13 tabs

  15. Accreditation of laboratories in the field of radiation protection

    International Nuclear Information System (INIS)

    Galjanic, S.; Franic, Z.

    2005-01-01

    This paper gives a review of requirements and procedures for the accreditation of test and calibration laboratories in the field of radiation protection, paying particular attention to Croatia. General requirements to be met by a testing or calibration laboratory to be accredited are described in the standard HRN EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories. The quality of a radiation protection programme can only be as good as the quality of the measurements made to support it. Measurement quality can be assured by participation in measurement assurance programmes that evaluate the appropriateness of procedures, facilities, and equipment and include periodic checks to assure adequate performance. These also include internal consistency checks, proficiency tests, intercomparisons and site visits by technical experts to review operations. In Croatia, laboratories are yet to be accredited in the field of radiation protection. However, harmonisation of technical legislation with the EU legal system will require some changes in laws and regulations in the field of radiation protection, including the ones dealing with the notification of testing laboratories and connected procedures. Regarding the notification procedures for testing laboratories in Croatia, in the regulated area, the existing accreditation infrastructure, i.e. Croatian Accreditation Agency is ready for its implementation, as it has already established and further developed a consistent accreditation system, compatible with international requirements and procedures.(author)

  16. Ambient environmental radiation monitoring at the Lawrence Livermore Laboratory

    International Nuclear Information System (INIS)

    Lindeken, C.L.; White, J.H.; Toy, A.J.; Sundbeck, C.W.

    1975-01-01

    Thermoluminescence dosimetry is the principal means of measuring ambient γ radiation at the Lawrence Livermore Laboratory. These dosimeters are used at 12 perimeter locations and 41 locations in the off-site vicinity of the Laboratory, and are exchanged quarterly. Control dosimeters are stored in a 75-mm-thick lead shield located out-of-doors to duplicate temperature cycling of field dosimeters. Effect of dosimeter response to radiation in the shield is determined each quarter. Calibration irradiations are made midway through the exposure cycle to compensate for signal fading. Terrestrial exposure rates calculated from the activities of naturally occurring uranium, thorium, and potassium in Livermore Valley soils vary from 3 to 7 μR/hr. Local inferred exposure rates from cosmic radiation are approximately 4 μR/hr. TLD measurements are in good agreement with these data. Off-site and site perimeter data are compared, and differences related to Laboratory operations are discussed

  17. Role of secondary standard dosimetry laboratory in radiation protection program

    International Nuclear Information System (INIS)

    Rahman, Sohaila; Ali, Noriah Mohd.

    2008-01-01

    Full text: The radiation dosimetry program is an important element of operational radiation protection. Dosimetry data enable workers and radiation protection professionals to evaluate and control work practices to eliminate unnecessary exposure to ionizing radiation. The usefulness of the data produced however depends on its quality and traceability. The emphasis of the global dosimetry program is focused through the IAEA/WHO network of secondary standard dosimetry laboratories (SSDLs), which aims for the determination of SI quantities through proper traceable calibration of radiation protection equipment. The responsibility of SSDL-NUCLEAR MALAYSIA to guarantee a reliable dosimetry service, which is traceable to international standards, is elucidated. It acts as the basis for harmonized occupational radiation monitoring in Malaysia.

  18. Galactic cosmic ray simulation at the NASA Space Radiation Laboratory

    Science.gov (United States)

    Norbury, John W.; Schimmerling, Walter; Slaba, Tony C.; Azzam, Edouard I.; Badavi, Francis F.; Baiocco, Giorgio; Benton, Eric; Bindi, Veronica; Blakely, Eleanor A.; Blattnig, Steve R.; Boothman, David A.; Borak, Thomas B.; Britten, Richard A.; Curtis, Stan; Dingfelder, Michael; Durante, Marco; Dynan, William S.; Eisch, Amelia J.; Elgart, S. Robin; Goodhead, Dudley T.; Guida, Peter M.; Heilbronn, Lawrence H.; Hellweg, Christine E.; Huff, Janice L.; Kronenberg, Amy; La Tessa, Chiara; Lowenstein, Derek I.; Miller, Jack; Morita, Takashi; Narici, Livio; Nelson, Gregory A.; Norman, Ryan B.; Ottolenghi, Andrea; Patel, Zarana S.; Reitz, Guenther; Rusek, Adam; Schreurs, Ann-Sofie; Scott-Carnell, Lisa A.; Semones, Edward; Shay, Jerry W.; Shurshakov, Vyacheslav A.; Sihver, Lembit; Simonsen, Lisa C.; Story, Michael D.; Turker, Mitchell S.; Uchihori, Yukio; Williams, Jacqueline; Zeitlin, Cary J.

    2017-01-01

    Most accelerator-based space radiation experiments have been performed with single ion beams at fixed energies. However, the space radiation environment consists of a wide variety of ion species with a continuous range of energies. Due to recent developments in beam switching technology implemented at the NASA Space Radiation Laboratory (NSRL) at Brookhaven National Laboratory (BNL), it is now possible to rapidly switch ion species and energies, allowing for the possibility to more realistically simulate the actual radiation environment found in space. The present paper discusses a variety of issues related to implementation of galactic cosmic ray (GCR) simulation at NSRL, especially for experiments in radiobiology. Advantages and disadvantages of different approaches to developing a GCR simulator are presented. In addition, issues common to both GCR simulation and single beam experiments are compared to issues unique to GCR simulation studies. A set of conclusions is presented as well as a discussion of the technical implementation of GCR simulation. PMID:26948012

  19. Radiation detectors laboratory; Laboratorio de detectores de radiacion

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez J, F.J. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    1997-07-01

    The Radiation detectors laboratory was established with the assistance of the International Atomic Energy Agency which gave this the responsibility to provide its services at National and regional level for Latin America and it is located at the ININ. The more expensive and delicate radiation detectors are those made of semiconductor, so it has been put emphasis in the use and repairing of these detectors type. The supplied services by this laboratory are: selection consultant, detectors installation and handling and associated systems. Installation training, preventive and corrective maintenance of detectors and detection systems calibration. (Author)

  20. Stanford Synchrotron Radiation Laboratory 1992 activity report

    International Nuclear Information System (INIS)

    Cantwell, K.

    1993-01-01

    Under SLAC's supervision, the SPEAR ring and injector system were operated for the first time in a truly dedicated mode for user experimentation. In October, SSRL became a division of SLAC. With that organizational change, SSRL became fully responsible for the operation, maintenance and improvement of SPEAR and its injection accelerators. At the same time, other radiation sources were studied. Free electron lasers providing enormous peak brightnesses and time average brightnesses about two orders of magnitude greater than the machines presently being constructed or commissioned were the object of one line of analysis. Ultra-short pulse beams at lower photons energies were also studied. These, as well, are described in Chapter 2. Significant gains were also made on the beam lines. Perhaps the most dramatic was the introduction of YB 66 crystals into the Jumbo monochromator, as described in Chapter 3. Looking to the future, SSRL held a workshop on Fourth Generation Light Sources in February and two workshops in conjunction with the Users Meeting. The impact of the high quality running is demonstrated by the many high quality experimental programs performed on SPEAR during the year. These are described in Chapter 6

  1. Astrophysical radiative shocks: From modeling to laboratory experiments

    Czech Academy of Sciences Publication Activity Database

    Gonzales, N.; Stehlé, C.; Audit, E.; Busquet, M.; Rus, Bedřich; Thais, F.; Acef, O.; Barroso, P.; Bar-Shalom, A.; Bauduin, D.; Kozlová, Michaela; Lery, T.; Madouri, A.; Mocek, Tomáš; Polan, Jiří

    2006-01-01

    Roč. 24, - (2006), s. 535-540 ISSN 0263-0346 EU Projects: European Commission(XE) 506350 - LASERLAB-EUROPE; European Commission(XE) 5592 - JETSET Grant - others:CNRS(FR) PNPS Institutional research plan: CEZ:AV0Z10100523 Keywords : laboratory astrophysics * laser plasmas * radiative shock waves * radiative transfer Subject RIV: BH - Optics, Masers, Lasers Impact factor: 3.958, year: 2006

  2. Laboratory investigation of fire radiative energy and smoke aerosol emissions

    Science.gov (United States)

    Charles Ichoku; J. Vanderlei Martins; Yoram J. Kaufman; Martin J. Wooster; Patrick H. Freeborn; Wei Min Hao; Stephen Baker; Cecily A. Ryan; Bryce L. Nordgren

    2008-01-01

    Fuel biomass samples from southern Africa and the United States were burned in a laboratory combustion chamber while measuring the biomass consumption rate, the fire radiative energy (FRE) release rate (Rfre), and the smoke concentrations of carbon monoxide (CO), carbon dioxide (CO2), and particulate matter (PM). The PM mass emission rate (RPM) was quantified from...

  3. Radiation safety. Handbook for laboratory workers in the USA

    International Nuclear Information System (INIS)

    Hotte, E.D.; Krueger, D.J.; Connor, K.

    2000-01-01

    The aim of the Handbook is to provide a source of information on radiation safety for those who are involved in the use of ionizing radiation in the laboratory. The potential reader may be a laboratory worker in the university or biomedical setting or the safety professional who desires a basic understanding of radiation protection within the research environment. The Handbook may be used as a reference by the radiation protection specialist or Radiation Safety Officer. To this end, liberal use is made of Appendices to make the Handbook a source of reference for a wide spectrum of readership while avoiding complicating the main body of the text. Each chapter or appendix is designed to stand alone. A complete reading of the Handbook will show that topics may be covered more than once. For example, one may read about the hazards and protective measures on handling radioiodine in Chapter 5 on Practical Radiation Protection as well as in Appendix 19 on Safe Handling of 125 I. Extensive use of figures, rather than tables has been made to present data, in the belief that these produce a good visual representation to a level of precision which is sufficient for most purposes of radiation protection in laboratories. The reader must remember that this Handbook should be taken as a guide only to the applicable regulations. You must consult the appropriate state or federal regulation directly or receive advice of a qualified radiation safety professional. Also, some information in the Appendices, such as commercially available training institutions or radioactive waste brokers, may change with time. Telephone numbers are given for the reader to call directly and check the services provided

  4. Design and implementation of a virtual laboratory of radiation measurement

    International Nuclear Information System (INIS)

    Alvarez T, J. R.; Morales S, J. B.

    2009-10-01

    The work involves the implementation of a virtual laboratory, this project is conducted in the Faculty of Engineering of National Autonomous University of Mexico with the name of LANUVI. It is intended that the laboratory can be used by students who have interest in the nuclear radiation knowledge as well as in its detection and attenuation, in addition serve as and introduction to nuclear systems. In the first part of project will conduct a source that can simulate the particle radiation of Alfa, beta, neutrons and gamma rays. The project will take sources used in class laboratories and elements that are dangerous but are used in different practical applications. After taking the source analyzing the particles behaviour in different media like air, animal tissue, aluminium, lead, etc. The analysis is done in different ways in order to know with which material can stop or mitigate the different types of radiation. Finally shall be measure radioactivity with different types of detectors. At this point, has the behaviour of ionization chamber but in the future is expected to make the simulation of some other radiation detectors. The mathematical models we represent the behaviour of these cases were implemented in free software. The program will be used to implement the virtual laboratory with radiation sources, detectors and different types of shields will be Blender which is a free software that is used by many users for the embodiment of games but try to use as a tool to help visualize the different equipment that is widely used in a radioactive materials laboratory. (Author)

  5. Savannah River Plant/Savannah River Laboratory radiation exposure report

    International Nuclear Information System (INIS)

    Rogers, C.D.; Hyman, S.D.; Keisler, L.L.; Reeder, D.F.; Jolly, L.; Spoerner, M.T.; Schramm, G.R.

    1989-01-01

    The protection of worker health and safety is of paramount concern at the Savannah River Site. Since the site is one of the largest nuclear sites in the nation, radiation safety is a key element in the protection program. This report is a compendium of the results in 1988 of the programs at the Savannah River Plant and the Savannah River Laboratory to protect the radiological health of employees. By any measure, the radiation protection performance at this site in 1988 was the best since the beginning of operations. This accomplishment was made possible by the commitment and support at all levels of the organizations to reduce radiation exposures to ALARA (As Low As Reasonably Achievable). The report provides detailed information about the radiation doses received by departments and work groups within these organizations. It also includes exposure data for recent years to allow Plant and Laboratory units to track the effectiveness of their ALARA efforts. Many of the successful practices and methods that reduced radiation exposure are described. A new goal for personnel contamination cases has been established for 1989. Only through continual and innovative efforts to minimize exposures can the goals be met. The radiation protection goals for 1989 and previous years are included in the report. 27 figs., 58 tabs

  6. A Radiation Laboratory Curriculum Development at Western Kentucky University

    International Nuclear Information System (INIS)

    Barzilov, Alexander P.; Novikov, Ivan S.; Womble, Phil C.

    2009-01-01

    We present the latest developments for the radiation laboratory curriculum at the Department of Physics and Astronomy of Western Kentucky University. During the last decade, the Applied Physics Institute (API) at WKU accumulated various equipment for radiation experimentation. This includes various neutron sources (computer controlled d-t and d-d neutron generators, and isotopic 252 Cf and PuBe sources), the set of gamma sources with various intensities, gamma detectors with various energy resolutions (NaI, BGO, GSO, LaBr and HPGe) and the 2.5-MeV Van de Graaff particle accelerator. XRF and XRD apparatuses are also available for students and members at the API. This equipment is currently used in numerous scientific and teaching activities. Members of the API also developed a set of laboratory activities for undergraduate students taking classes from the physics curriculum (Nuclear Physics, Atomic Physics, and Radiation Biophysics). Our goal is to develop a set of radiation laboratories, which will strengthen the curriculum of physics, chemistry, geology, biology, and environmental science at WKU. The teaching and research activities are integrated into real-world projects and hands-on activities to engage students. The proposed experiments and their relevance to the modern status of physical science are discussed.

  7. Standardization of irradiation values at the Radiation Calibration Laboratory

    International Nuclear Information System (INIS)

    Pham Van Dung; Hoang Van Nguyen; Phan Van Toan; Phan Dinh Sinh; Tran Thi Tuyet; Do Thi Phuong

    2007-01-01

    The objective of the theme is to determine dose rates around radiation facilities and sources in the NRI Radiation Calibration Laboratory. By improving equipment, calibrating a main dosemeter and carrying out experiments, the theme team received the following results: 1. The controller of a X-rays generator PY(-200 was improved. It permits to increase accuracy of radiation dose calibration up to 2-4 times; 2. The FAMER DOSEMETER 2570/1B with the ionization chamber NE 2575 C of the NRI Radiation Calibration Laboratory was calibrated at SSDL (Hanoi); 3. Dose rates at 4 positions around a high activity Co-60 source were determined; 4. Dose rates at 3 positions around a low activity Co-60 source were determined; 5. Dose rates at 3 positions around a low activity Cs-137 source were determined; 6. Dose rate at 1 position of a X-rays beam (Eaverage = 48 keV) was determined; 7. Dose rate at 1 position of a X-rays beam (Eaverage = 65 keV) was determined. (author)

  8. Calibration of radioprotection equipment gamma radiation at the Laboratory of Ionizing Radiation Metrology - DEN/UFPE

    International Nuclear Information System (INIS)

    Nazario, Macilene; Khoury, Helen; Hazin, Clovis

    2003-01-01

    This work presents aspects of the radioprotection equipment calibration service of the Laboratory for Metrology of Ionizing Radiations (LMRI) of the DEN/UFPE related to the calibration procedures, characteristics of the radiation beam and the evaluation of equipment calibrated in the period of 2001-2002. The LMRI-DEN/UFPE is one of the four laboratories in Brazil licensed by the Brazilian Nuclear Energy Commission for the execution of calibration services on area, surface contamination and personal monitors used by industries, hospitals, universities and research institutes using radioactive sources

  9. Radiation dosimetry and standards at the austrian dosimetry laboratory

    International Nuclear Information System (INIS)

    Leitner, A.

    1984-10-01

    The Austrian Dosimetry Laboratory, established and operated in cooperation between the Austrian Research Center Seibersdorf and the Federal Office of Metrology and Surveying (Bundesamt and Eich- und Vermessungswesen) maintains the national primary standards for radiation dosimetry. Furthermore its tasks include routine calibration of dosemeters and dosimetric research. The irradiation facilities of the laboratory comprise three X-ray machines covering the voltage range from 5 kV to 420 kV constant potential, a 60 Co teletherapy unit, a circular exposure system for routine batch calibration of personnel dosemeters with four gamma ray sources ( 60 Co and 137 Cs) and a reference source system with six gamma ray sources ( 60 Co and 137 Cs). In addition a set of calibrated beta ray sources are provided ( 147 Pm, 204 Tl and 90 Sr). The dosimetric equipment consists of three free-air parallelplate ionization chambers serving as primary standards of exposure for the X-ray energy region, graphite cavity chambers with measured volume as primary standards for the gamma radiation of 137 Cs and 60 Co as well as different secondary standard ionization chambers covering the dose rate range from the natural background level up to the level of modern therapy accelerators. In addition for high energy photon and electron radiation a graphite calorimeter is provided as primary standard of absorbed dose. The principle experimental set-ups for the practical use of the standards are presented and the procedures for the calibration of the different types of dosemeters are described. (Author)

  10. Radiation protection calibration facilities at the National Radiation Laboratory, New Zealand

    International Nuclear Information System (INIS)

    Foote, B.J.

    1995-01-01

    The National Radiation Laboratory (NRL), serving under the Ministry of Health, provides radiation protection services to the whole of New Zealand. Consequently it performs many functions that are otherwise spread amongst several organizations in larger countries. It is the national regulatory body for radiation protection. It writes and enforces codes of safe practice, and conducts safety inspections of all workplaces using radiation. It provides a personal monitoring service for radiation workers. It also maintains the national primary standards for x-ray exposure and 60 Co air kerma. These standards are transferred to hospitals through a calibration service. The purpose of this report is to outline the primary standards facilities at NRL, and to discuss the calibration of dosemeters using these facilities. (J.P.N.)

  11. HESYRL: a dedicated synchrotron radiation laboratory in China

    International Nuclear Information System (INIS)

    Qiu, L.J.

    1985-01-01

    The HESYRL national synchrotron radiation laboratory was first proposed in 1977 as a conclusion of a general planning meeting on nationwide development of natural science and technology at which a topic was the application of synchrotron radiation. A study group was formed in 1978 to carry out preliminary research and prototype development work. The final approval of the project was given in April 1983 and the lab was soon founded. Designs of the main facilities and building completed in Oct 1984. The ground breaking was in Nov 1984. Manufacturing and purchasing of all the equipment and components are now in progress. The overall layout of HESYRL project is shown. the main facilities are an 800 MeV electron storage ring, a 88 meter transport line and a 240 MeV linac as the injector. Some basic considerations in the selecting of major machine parameters are discussed

  12. Radiation and detection of gravitational waves in laboratory conditions

    International Nuclear Information System (INIS)

    Bogolyubov, P.N.; Pisarev, A.F.; Shavokhina, N.S.

    1981-01-01

    Two variants are proposed and analyzed for an experiment on radiation and detection of gravitational waves in laboratory conditions in the optical and superhigh frequency range (band). In the first variant the laser light is parametrically transformed to the gravitational wave in the optical-inhomogeneous medium. The gravitational flux produced is registered by the inverse parametric transformation of the gravitational to light wave. In the second variant the radiation of gravitational waves is realized through hypersonic oscillations in piezocrystals, and the reception of waves is made by the superconducting coaxial resonator in which the gravitational wave resonantly transforms into the electromag= . netic wave. The analysis performed testifies to the possibility of an experiment of this type at the present time [ru

  13. Development of Remote Control Laboratory for Radiation Detection via Internet

    International Nuclear Information System (INIS)

    Park, Sang Tae; Lee, Hee Bok; Yuk, Keun Chul

    2002-01-01

    The role of experiments in science education is essential for understanding the natural phenomena and principle related to a subject. Therefore, the remote control experiment via Internet is one of key solution for distance learners in science education. The remote experiments are also necessary for the time-consuming experiment which takes several days, collaborative experiment between distance learners, expensive laboratory equipment which is not usually available to students, experimental procedure which is dangerous, etc. In this study, we have developed a general method for a remote control laboratory system using internet and interface techniques. It is possible for students to learn the nuclear physics to control the real instruments and conduct physics experimentation with internet techniques. We proposed the remote control radiation measurement system as a sample application. This system could be useful for the monitoring near a nuclear power plants in order to improve the environment data credibility to the public

  14. Laboratory contamination in the early period of radiation research

    International Nuclear Information System (INIS)

    Rona, E.

    1979-01-01

    Meagre records exist of the levels of contamination and human exposure encountered by those who took part in the early research on radioactive materials. In order to throw some light on the nature and extent of the problem the author presents some recollections of the conditions of the laboratories in which she worked from 1924-1940. These include the Kaiser Wilhelm Institute, the Radium Institute of Vienna and the Curie Institute. The health, radiation injuries and causes of death of some early workers are discussed. Although the effects of acute exposure were recognised early on, there was less awareness of the possible effects of chronic exposure, and lack of prompt clinical signs of injury encouraged complacency. Laboratory contamination was often seen more as a problem affecting experimental results than as a health hazard. (author)

  15. Radiation chemistry in the Jovian stratosphere - Laboratory simulations

    Science.gov (United States)

    Mcdonald, Gene D.; Thompson, W. R.; Sagan, Carl

    1992-01-01

    The results of the present low-pressure/continuous-flow laboratory simulations of H2/He/CH4/NH3 atmospheres' plasma-induced chemistry indicate radiation yields of both hydrocarbon and N2-containing organic compounds which increase with decreasing pressure. On the basis of these findings, upper limits of 1 million-1 billion molecules/sq cm/sec are established for production rates of major auroral-chemistry species in the Jovian stratosphere. It is noted that auroral processes may account for 10-100 percent of the total abundances of most of the observed polar-region organic species.

  16. Optimization of radiation safety conditions in radon laboratories

    International Nuclear Information System (INIS)

    Kibal'nik, S.P.; Koroleva, T.M.

    1990-01-01

    The study was aimed at studying working conditions of personnel, engaged in production and supply of radon solution in medical and prophylactic institutions of the Kaliningrad region for the period 1962-1988. Data on examinations carried out at radon laboratories during this period by radiological group of the Kaliningrad sanitary epidemiological station were used as a basis for the study. Positive dynamics of indicators of radiation safety of the persons working at these objects is indicated, concrete measures and ways for improving working conditions of the personnel and role of sanitary epidemiological service in solving these problems are shown. 2 refs.; 1 tab

  17. Radiation protection in a multi-disciplinary research laboratory

    International Nuclear Information System (INIS)

    O'Donovan, E.J.B.; Jenks, G.J.; Brighton, D.R.

    1993-01-01

    This paper describes the measures for the protection of personnel against the hazards of ionising and non-ionising radiation at the Materials Research Laboratory (MRL) in Victoria. The paper describes MRL safety and protection policy and management, and gives brief details of procedures and problems at the working level. A comparison of MRL average annual photon doses with all Governmental Research Institutions and industry is given. The good safety record of MRL is evident and shows that the radioactive protection issues are well handled. 4 figs

  18. The Stanford Synchrotron Radiation Laboratory, 20 years of synchrotron light

    International Nuclear Information System (INIS)

    Cantwell, K.

    1993-08-01

    The Stanford Synchrotron Radiation Laboratory (SSRL) is now operating as a fully dedicated light source with low emittance electron optics, delivering high brightness photon beams to 25 experimental stations six to seven months per year. On October 1, 1993 SSRL became a Division of the Stanford Linear Accelerator Center, rather than an Independent Laboratory of Stanford University, so that high energy physics and synchrotron radiation now function under a single DOE contract. The SSRL division of SLAC has responsibility for operating, maintaining and improving the SPEAR accelerator complex, which includes the storage ring and a 3 GeV injector. SSRL has thirteen x-ray stations and twelve VUV/Soft x-ray stations serving its 600 users. Recently opened to users is a new spherical grating monochromator (SGM) and a multiundulator beam line. Circularly polarized capabilities are being exploited on a second SGM line. New YB 66 crystals installed in a vacuum double-crystal monochromator line have sparked new interest for Al and Mg edge studies. One of the most heavily subscribed stations is the rotation camera, which has been recently enhanced with a MAR imaging plate detector system for protein crystallography on a multipole wiggler. Under construction is a new wiggler-based structural molecular biology beam line with experimental stations for crystallography, small angle scattering and x-ray absorption spectroscopy. Plans for new developments include wiggler beam lines and associated facilities specialized for environmental research and materials processing

  19. Stanford Synchrotron Radiation Laboratory activity report for 1987

    Energy Technology Data Exchange (ETDEWEB)

    Robinson, S.; Cantwell, K. [eds.

    1988-12-31

    During 1987, SSRL achieved many significant advances and reached several major milestones utilizing both SPEAR and PEP as synchrotron radiation sources as described in this report. Perhaps the following two are worthy of particular mention: (1) SPEAR reached an all time high of 4,190 delivered user-shifts during calendar year 1987, highlights of the many scientific results are given; (2) during a 12 day run in December of 1987, PEP was operated in a low emittance mode (calculated emittance 6.4 nanometer-radians) at 7.1 GeV with currents up to 33 mA. A second undulator beam line on PEP was commissioned during this run and used to record many spectra showing the extremely high brightness of the radiation. PEP is now by far the highest brightness synchrotron radiation source in the world. The report is divided into the following sections: (1) laboratory operations; (2) accelerator physics programs; (3) experimental facilities; (4) engineering division; (5) conferences and workshops; (6) SSRL organization; (7) experimental progress reports; (8) active proposals; (9) SSRL experiments and proposals by institution; and (10) SSRL publications.

  20. Radiation safety and quality control in the cyclotron laboratory

    International Nuclear Information System (INIS)

    Sharma, S.; Krause, G.; Ebadi, M.

    2006-01-01

    Radiation safety was determined to maintain quality control in the cyclotron laboratory. Based on the results of 438 runs in the Faraday cup (20 μA for 10 min), 20 runs on 18 O-water target (40 μA for 2 h) and 10 runs on 18 O-gas targets (30 μA for 45 min), we have established that occupationally exposed workers remain 10 ± 5 times below federal regulatory limits (FRLs) in the cyclotron vault, 30 ± 8 times below FRL in the radiochemistry laboratory and 200 ± 10 times below the FRL outside the cyclotron laboratory during beam operation. (The FRL for unrestricted area are <20 μSv in 1 h.) The non-occupationally exposed workers serving in offices in the vicinity of the cyclotron vault within 100 m distance remained 200 times below the FRL irrespective of beam being on or off, suggesting that routine beam operation of 40 μA for 2 h once a day during office hours is safe provided quality control and system performance measures as discussed in this report are strictly maintained. (authors)

  1. Radiative Transfer Theory Verified by Controlled Laboratory Experiments

    Science.gov (United States)

    Mishchenko, Michael I.; Goldstein, Dennis H.; Chowdhary, Jacek; Lompado, Arthur

    2013-01-01

    We report the results of high-accuracy controlled laboratory measurements of the Stokes reflection matrix for suspensions of submicrometer-sized latex particles in water and compare them with the results of a numerically exact computer solution of the vector radiative transfer equation (VRTE). The quantitative performance of the VRTE is monitored by increasing the volume packing density of the latex particles from 2 to 10. Our results indicate that the VRTE can be applied safely to random particulate media with packing densities up to 2. VRTE results for packing densities of the order of 5 should be taken with caution, whereas the polarized bidirectional reflectivity of suspensions with larger packing densities cannot be accurately predicted. We demonstrate that a simple modification of the phase matrix entering the VRTE based on the so-called static structure factor can be a promising remedy that deserves further examination.

  2. PREFACE: Acceleration and radiation generation in space and laboratory plasmas

    Science.gov (United States)

    Bingham, R.; Katsouleas, T.; Dawson, J. M.; Stenflo, L.

    1994-01-01

    Sixty-six leading researchers from ten nations gathered in the Homeric village of Kardamyli, on the southern coast of mainland Greece, from August 29-September 4, 1993 for the International Workshop on Acceleration and Radiation Generation in Space and Laboratory Plasmas. This Special Issue represents a cross-section of the presentations made at and the research stimulated by that meeting. According to the Iliad, King Agamemnon used Kardamyli as a dowry offering in order to draw a sulking Achilles into the Trojan War. 3000 years later, Kardamyli is no less seductive. Its remoteness and tranquility made it an ideal venue for promoting the free exchange of ideas between various disciplines that do not normally interact. Through invited presen tations, informal poster discussions and working group sessions, the Workshop brought together leaders from the laboratory and space/astrophysics communities working on common problems of acceleration and radiation generation in plasmas. It was clear from the presentation and discussion sessions that there is a great deal of common ground between these disciplines which is not at first obvious due to the differing terminologies and types of observations available to each community. All of the papers in this Special Issue highlight the role collective plasma processes play in accelerating particles or generating radiation. Some are state-of-the-art presentations of the latest research in a single discipline, while others investi gate the applicability of known laboratory mechanisms to explain observations in natural plasmas. Notable among the latter are the papers by Marshall et al. on kHz radiation in the magnetosphere ; Barletta et al. on collective acceleration in solar flares; and by Dendy et al. on ion cyclotron emission. The papers in this Issue are organized as follows: In Section 1 are four general papers by Dawson, Galeev, Bingham et al. and Mon which serves as an introduction to the physical mechanisms of acceleration

  3. Data survey about radiation protection and safety of radiation sources in research laboratories

    International Nuclear Information System (INIS)

    Paura, Clayton L.; Dantas, Ana Leticia A.; Dantas, Bernardo M.

    2005-01-01

    In Brazil, different types of research using unsealed sources are developed with a variety of radioisotopes. In such activities, professionals and students involved are potentially exposed to internal contamination by 14 C, 45 Ca, 51 Cr, 3 H, 125 I, 32 P, 33 P, 35 S, 90 Sr and 99m Tc. The general objective of this work is to evaluate radiological risks associated to these practices in order to supply information for planning actions aimed to improve radiation protection conditions in research laboratories. The criteria for risk evaluation and the safety aspects adopted in this work were based on CNEN Regulation 6.02 and in IAEA and NRPB publications. The survey of data was carried out during visits to laboratories in public Universities located in the city of Rio de Janeiro where unsealed radioactive sources are used in biochemistry, biophysics and genetic studies. According to the criteria adopted in this work, some practices developed in the laboratories require evaluation of risk of internal contamination depending on the conditions of source manipulation. It was verified the need for training of users of radioactive materials in this type of laboratory. This can be facilitated by the use of basic guides for the classification of areas, radiation protection, safety and source security in research laboratories. It was also observed the need for optimization of such practices in order to minimize the contact with sources. It is recommended to implement more effective source and access controls as a way to reduce risks of individual radiation exposure and loss of radioactive materials (author)

  4. SSPM based radiation sensing: Preliminary laboratory and clinical results

    International Nuclear Information System (INIS)

    Konnoff, Daniel C.; Plant, Thomas K.; Shiner, Elizabeth

    2011-01-01

    Recent Solid State Photomultiplier (SSPM) technology has matured, reaching a performance level that is suitable for replacement of the ubiquitous photomultiplier tube in selected applications for environmental radiation monitoring, clinical dosimetry, and medical imaging purposes. The objective of this work is low signal level laboratory and high signal level clinical testing of the Hamamatsu MPPC (S10362-11-050C), Photonique SSPM (0810G1), and Voxtel SiPM (SQBF-EKAA/SQBF-EIOA) SSPMs coupled to different inorganic scintillator crystals (Prelude 420, BGO), inorganic doped glass scintillator material SiO 2 :Cu 2+ and organic BCF-12 plastic scintillating fibers, used as detector elements. Plastic Optical Fibers (POFs) and Glass Optical Fibers (GOFs) are used as signal conduits for laboratory and clinical testing. Further, reduction of electron-beam-generated Cerenkov light in optical fibers is facilitated by the inclusion of metalized air-core capillary tubing between the BCF-12 plastic scintillating fiber and the POF. In a clinical setting dose linearity, percent depth dose, and angular measurements for 6 MV/18 MV photon beams and 9 MeV electron beams are compared with and without the use of the air-core capillary tubing for BCF-12 plastic scintillating fiber. These same measurements are repeated for SiO 2 :Cu 2+ scintillator material without air-core capillary tubing.

  5. Participation of the radiation hygiene laboratories to the WHO/UNEP global environmental radiation network

    International Nuclear Information System (INIS)

    Milu, C.; Gheorghe, R.

    2003-01-01

    In December 1987, a WHO-UNEP meeting held at SCPRI (Service Central de protection canter Les Rayonnements Ionisantes - Le Vesinet, France) set up the basis of the international network GERMON (Global Environmental Radiation Monitoring Network) as an extension of existing network 'Global Environment Monitoring Systems' (GEMS). The accident from Chernobyl certainly was the important nuclear event influencing this decision. The aim of the GERMON network is to initiate programmes for the routine monitoring of the environmental radioactivity and to ensure a quick interchange of credible data in case of major accidental radioactive releases, as well as the development of intervention devices in the member states running such programmes. The responsibility of the Co-ordinating Collaborating Centre (CCC) has been given to the French Service Central de Protection Centre les Rayonnements Ionisants (SCPRI). In 1994, this Service became the Office de Protection Centre les Rayonnements Ionisants (OPRI). The Ministry of Health has a national network consisting of 23 radiation hygiene laboratories; 19 of these are included in the framework of county divisions of public health , and the other 4 are compartments of the regional institutes of public health. WHO designated the Institute of Public Health from Bucharest as National Contact Centre, in charge with communicating the results obtained by the national laboratories on the indicators of environmental radioactivity, according to the established methodologies. The main indicators considered are: ambient gamma dose, radioactivity of the air, of the precipitation, and of the milk. Following the measurement and transmission protocols of the CCC, the Radiation Hygiene Laboratory from the Institute of Public Health has established a methodology to be followed by the laboratories of the national network. (authors)

  6. Instructor qualification for radiation safety training at a national laboratory

    International Nuclear Information System (INIS)

    Trinoskey, P.A.

    1994-10-01

    Prior to 1993, Health Physics Training (HPT) was conducted by the Lawrence Livermore National Laboratory (LLNL) health physics group. The job requirements specified a Masters Degree and experience. In fact, the majority of Health Physicists in the group were certified by the American Board of Health Physics. Under those circumstances, it was assumed that individuals in the group were technically qualified and the HPT instructor qualification stated that. In late 1993, the Health Physics Group at the LLNL was restructured and the training function was assigned to the training group. Additional requirements for training were mandated by the Department of Energy (DOE), which would necessitate increasing the existing training staff. With the need to hire, and the policy of reassignment of employees during downsizing, it was imperative that formal qualification standards be developed for technical knowledge. Qualification standards were in place for instructional capability. In drafting the new training qualifications for instructors, the requirements of a Certified Health Physicists had to be modified due to supply and demand. Additionally, for many of the performance-based training courses, registration by the National Registry of Radiation Protection Technologists is more desirable. Flexibility in qualification requirements has been incorporated to meet the reality of ongoing training and the compensation for desirable skills of individuals who may not meet all the criteria. The qualification requirements for an instructor rely on entry-level requirements and emphasis on goals (preferred) and continuing development of technical and instructional capabilities

  7. Determination of the scattered radiation at the Neutron Calibration Laboratory of IPEN, SP, Brazil

    International Nuclear Information System (INIS)

    Alvarenga, Tallyson; Valeriano, Caio C.S.; Caldas, Linda V.E.; Federico, Claudio A.

    2016-01-01

    With the increased use of techniques using neutron radiation, there has been a considerable growth in the number of detectors for this kind of radiation. A neutron calibration laboratory with neutron radiation ("2"4"1AmBe) was designed. In practical situations of this type of laboratory, one of the main problems is related to the knowledge of scattered radiation. In order to evaluate this scattered radiation, simulations were carried out without the presence of structural elements and with the complete room. Fourteen measuring points were evaluated in different directions at various distances. (author)

  8. Environmental Remediation Sciences Program at the Stanford Synchrotron Radiation Laboratory

    International Nuclear Information System (INIS)

    Bargar, John R.

    2006-01-01

    Synchrotron radiation (SR)-based techniques provide unique capabilities to address scientific issues underpinning environmental remediation science and have emerged as major research tools in this field. The high intensity of SR sources and x-ray photon-in/photon-out detection allow noninvasive in-situ analysis of dilute, hydrated, and chemically/structurally complex natural samples. SR x-rays can be focused to beams of micron and sub-micron dimension, which allows the study of microstructures, chemical microgradients, and microenvironments such as in biofilms, pore spaces, and around plant roots, that may control the transformation of contaminants in the environment. The utilization of SR techniques in environmental remediation sciences is often frustrated, however, by an ''activation energy barrier'', which is associated with the need to become familiar with an array of data acquisition and analysis techniques, a new technical vocabulary, beam lines, experimental instrumentation, and user facility administrative procedures. Many investigators find it challenging to become sufficiently expert in all of these areas or to maintain their training as techniques evolve. Another challenge is the dearth of facilities for hard x-ray micro-spectroscopy, particularly in the 15 to 23 KeV range, which includes x-ray absorption edges of the priority DOE contaminants Sr, U, Np, Pu, and Tc. Prior to the current program, there were only two (heavily oversubscribed) microprobe facilities in the U.S. that could fully address this energy range (one at each of APS and NSLS); none existed in the Western U.S., in spite of the relatively large number of DOE laboratories in this region

  9. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, 21

    International Nuclear Information System (INIS)

    1990-03-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1987 through March 31, 1988. Detailed descriptions of the activities are presented in the following subjects: (i) studies on surface phenomena under electron and ion irradiations and (ii) studies on radiation chemistry of high polymers and radiation dosimetry. (J.P.N.)

  10. Secondary standards laboratories for ionizing radiation calibrations: the national laboratory interests

    International Nuclear Information System (INIS)

    Roberson, P.L.; Campbell, G.W.

    1984-11-01

    The national laboratories are probable candidates to serve as secondary standards laboratories for the federal sector. Representatives of the major Department of Energy laboratories were polled concerning attitudes toward a secondary laboratory structure. Generally, the need for secondary laboratories was recognized and the development of such a program was encouraged. The secondary laboratories should be reviewed and inspected by the National Bureau of Standards. They should offer all of the essential, and preferably additional, calibration services in the field of radiological health protection. The selection of secondary laboratories should be based on economic and geographic criteria and/or be voluntary. 1 ref., 2 tabs

  11. Practice for characterization and performance of a high-dose radiation dosimetry calibration laboratory

    International Nuclear Information System (INIS)

    2003-01-01

    This practice addresses the specific requirements for laboratories engaged in dosimetry calibrations involving ionizing radiation, namely, gamma-radiation, electron beams or X-radiation (bremsstrahlung) beams. It specifically describes the requirements for the characterization and performance criteria to be met by a high-dose radiation dosimetry calibration laboratory. The absorbed-dose range is typically between 10 and 10 5 Gy. This practice addresses criteria for laboratories seeking accreditation for performing high-dose dosimetry calibrations, and is a supplement to the general requirements described in ISO/IEC 17025. By meeting these criteria and those in ISO/IEC 17025, the laboratory may be accredited by a recognized accreditation organization. Adherence to these criteria will help to ensure high standards of performance and instill confidence regarding the competency of the accredited laboratory with respect to the services it offers

  12. An overview of the facilities of the Ionizing Radiation Laboratory, South Africa

    International Nuclear Information System (INIS)

    Mostert, J.C.

    2002-01-01

    The Ionising Radiation Laboratory (IRL) of the CSIR-National Metrology Laboratory (NML) in South Africa was recently accepted as a member of the IAEA SSDL network. This article gives a very brief overview of the services and facilities provided by this laboratory. The NML has the responsibility to realize and maintain the national measuring standards in South Africa. In the field of ionizing radiation, this function is performed by the IRL. The IRL provides traceability through its calibration and measurement services for regulatory authorities, institutions providing radiation therapy services such as hospitals and other oncology centres, radiation protection service providers such as the South African Bureau of Standards (SABS), the radiation protection industry in general and to companies providing industrial quality assurance services. These services also extend to a number of countries in the Southern African Development Community (SADC) which do not currently have metrology facilities of their own

  13. Radiation chemistry at the Metallurgical Laboratory, Manhattan Project, University of Chicago (1942-1947) and the Argonne National Laboratory, Argonne, IL (1947-1984)

    International Nuclear Information System (INIS)

    Gordon, S.

    1989-01-01

    The events in radiation chemistry which occurred in the Manhattan Project Laboratory and Argonne National Laboratory during World War II are reviewed. Research programmes from then until the present day are presented, with emphasis on pulse radiolysis studies. (UK)

  14. National Laboratory of Ionizing Radiation Metrology - Brazilian CNEN; Laboratorio Nacional de Metrologia das Radiacoes Ionizantes

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1993-12-31

    The activities of the Brazilian National Laboratory of Ionizing Radiations Metrology are described. They include research and development of metrological techniques and procedures, the calibration of area radiation monitors, clinical dosemeters and other instruments and the preparation and standardization of reference radioactive sources. 4 figs., 13 tabs.

  15. Laboratory Training Manual on the Use of Isotopes and Radiation in Entomology.

    Science.gov (United States)

    International Atomic Energy Agency, Vienna (Austria).

    This publication should be useful for those who are interested in the theory and application of isotopes and radiation in agriculture and entomology. There are two main parts in the publication. Part I, entitled Basic Part, includes topics which an individual should know about radioisotopes and radiation. There are laboratory exercises included in…

  16. Pacific Northwest Laboratory plan to maintain radiation exposure as low as reasonably achievable (ALARA)

    International Nuclear Information System (INIS)

    Higby, D.P.; Denovan, J.T.

    1982-12-01

    This document describes the radiation safety program at the Pacific Northwest Laboratory (PNL). The practices and administrative policies of this program support the principles of ALARA (to maintain radiation exposure as low as reasonably achievable). This document also describes a program to establish safety goals at PNL to help ensure that operations are conducted according to ALARA principles

  17. National Laboratory of Ionizing Radiation Metrology - Brazilian CNEN; Laboratorio Nacional de Metrologia das Radiacoes Ionizantes

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1992-12-31

    The activities of the Brazilian National Laboratory of Ionizing Radiations Metrology are described. They include research and development of metrological techniques and procedures, the calibration of area radiation monitors, clinical dosemeters and other instruments and the preparation and standardization of reference radioactive sources. 4 figs., 13 tabs.

  18. How to prepare a calibration laboratory for ionizing radiation using X rays

    International Nuclear Information System (INIS)

    Bossio, Francisco; Cardoso, Ricardo de Souza; Quaresma, Daniel da Silva; Batista Filha, Luzianete do Amaral; Peixoto, Jose Guilherme Pereira

    2013-01-01

    This work shows the main features of a system for calibration and testing of radiation detectors used in low and medium energy. It is based on pre-assembly System Laboratory of Metrology Division (DIMET) Institute of Radiation Protection and Dosimetry (IRD) of the National Commission of Nuclear Energy (CNEN). (author)

  19. Conception of the Instrument Calibration Laboratory of Ionizing Radiation Measurement (LACIMRI) of CTMSP - Sao Paulo, SP

    International Nuclear Information System (INIS)

    Silva, Raimundo Dias da; Kibrit, Eduardo

    2009-01-01

    The present work describes the phases of implantation of calibration laboratory of ionizing radiation measurement instruments at the CTMSP, Sao Paulo, in a priory approved by CNEN, Brazil. That laboratory will allow and enhance the present metrological capacity for the attendance to the growing demand for calibration services of the instruments

  20. University Physics Students' Ideas of Thermal Radiation Expressed in Open Laboratory Activities Using Infrared Cameras

    Science.gov (United States)

    Haglund, Jesper; Melander, Emil; Weiszflog, Matthias; Andersson, Staffan

    2017-01-01

    Background: University physics students were engaged in open-ended thermodynamics laboratory activities with a focus on understanding a chosen phenomenon or the principle of laboratory apparatus, such as thermal radiation and a heat pump. Students had access to handheld infrared (IR) cameras for their investigations. Purpose: The purpose of the…

  1. Evaluation of Radiometers Deployed at the National Renewable Energy Laboratory's Solar Radiation Research Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Habte, Aron; Wilcox, Stephen; Stoffel, Thomas

    2015-12-23

    This study analyzes the performance of various commercially available radiometers used for measuring global horizontal irradiances and direct normal irradiances. These include pyranometers, pyrheliometers, rotating shadowband radiometers, and a pyranometer with fixed internal shading and are all deployed at the National Renewable Energy Laboratory's Solar Radiation Research Laboratory. Data from 32 global horizontal irradiance and 19 direct normal irradiance radiometers are presented. The radiometers in this study were deployed for one year (from April 1, 2011, through March 31, 2012) and compared to measurements from radiometers with the lowest values of estimated measurement uncertainties for producing reference global horizontal irradiances and direct normal irradiances.

  2. Strengthening of an advanced automated radiation laboratory. Hungary. Terminal report project findings and recommendations

    International Nuclear Information System (INIS)

    1992-01-01

    An Advanced Automated Radiation Laboratory was completed; the hardware and software bases are now suitable for up-to-date kinetical measurements in radiation chemistry and technology both for Hungarian experts and for specialists from abroad. It would be possible and useful e.g. to organize further training courses in the field of radiation chemistry and technology by the IAEA and/or the UNDP, as well as to send fellows from developing countries for practical research work or other purposes (TCDC)

  3. Contribution of the radiation hygiene laboratories network in physical protection of radiation materials in Romania

    International Nuclear Information System (INIS)

    Milu, C.

    2002-01-01

    Full text: The Ministry of Health and Family from Romania has its own radiation protection network, including 23 radiation hygiene laboratories (RHLs), within the Institutes of Public Health-Bucharest, Iassy, Cluj-Napoca and Timisoara and the Directions of Public Health from Arges county, Bihor, Brasov, Mures, Maramures, Cluj, Sibiu, Harghita, Suceava, lassy, Bacau, Neamt, Galati, Constanta, Prahova, Dolj, Caras-Severin, Timis and Bucharest City. The RHLs network has 170 persons (physicians, physicists, engineers, chemists, biologists and technicians) and it is technically co-ordinated by the RHL in the Institute of Public Health-Bucharest. Within the local or national activities for physical protection of radioactive materials, the RHLs network closely co-operates with the Ministry of Internal Affairs (MAI) and with the nuclear regulatory authority, named the National Commission for Nuclear Activities Control (CNCAN). In the particular case of theft, sabotage or illicit traffic of radioactive materials, usually the MAI has the main role in the co-ordination of intervention actions of the three authorities. The RHLs network contributes by the expertise of its staff and by using its intervention facilities. The specific tasks for the RHLs network are: identification of the type and size of the radioactive material (by direct dosimetry and/or by gamma spectroscopy); dose reconstructions for the involved persons, the intervention personnel and the population; health management for overexposed persons and the medical response, including biological dosimetry and epidemiological studies. Recent special situations in this field, were: theft of some fuel (defect) tablets of natural uranium, from a production factory; the illicit traffic of radioactive materials, in transition to Western European Countries; an unauthorized decommissioning of a furnace, determining the uncontrolled dispersion of about 30 cobalt-60 sealed sources and the radiation exposure of nearly 20

  4. Line radiation effects in laboratory and astrophysical plasmas

    Czech Academy of Sciences Publication Activity Database

    Kerr, F.M.; Gouveia, A.; Renner, Oldřich; Rose, S. J.; Scott, H.A.; Wark, J. S.

    2006-01-01

    Roč. 99, - (2006), s. 363-369 ISSN 0022-4073 R&D Projects: GA MŠk(CZ) LC528 Institutional research plan: CEZ:AV0Z10100523 Keywords : radiation transport * plasmas * opacity effects Subject RIV: BH - Optics, Masers, Lasers Impact factor: 1.599, year: 2006

  5. Building the basis for a comprehensive radiation protection program for a multi-program laboratory

    International Nuclear Information System (INIS)

    Copenhaver, E.D.

    1987-01-01

    An explicit, workplace-specific training has been developed, implemented, and documented for all radiation workers. In addition to the radiation worker personnel located at reactors, accelerators, radiochemical laboratories, and waste treatment areas, we have trained other personnel who work in areas where a lesser potential for radiological/chemical exposure exists. These workforces include construction crews, site restoration crews, contracted special services such as scoping and site characterization teams, and short-term visitors. We are developing a comprehensive, integrated approach to radiation protection training suited for a multi-purpose research laboratory. 9 refs., 1 fig., 1 tab

  6. Note: Measurement system for the radiative forcing of greenhouse gases in a laboratory scale

    Energy Technology Data Exchange (ETDEWEB)

    Kawamura, Yoshiyuki [Department of Intelligent Mechanical Engineering, Fukuoka Institute of Technology, 3-30-1 Wajirohigashi, Higashiku, Fukuoka 811-0295 (Japan)

    2016-01-15

    The radiative forcing of the greenhouse gases has been studied being based on computational simulations or the observation of the real atmosphere meteorologically. In order to know the greenhouse effect more deeply and to study it from various viewpoints, the study on it in a laboratory scale is important. We have developed a direct measurement system for the infrared back radiation from the carbon dioxide (CO{sub 2}) gas. The system configuration is similar with that of the practical earth-atmosphere-space system. Using this system, the back radiation from the CO{sub 2} gas was directly measured in a laboratory scale, which roughly coincides with meteorologically predicted value.

  7. Note: Measurement system for the radiative forcing of greenhouse gases in a laboratory scale.

    Science.gov (United States)

    Kawamura, Yoshiyuki

    2016-01-01

    The radiative forcing of the greenhouse gases has been studied being based on computational simulations or the observation of the real atmosphere meteorologically. In order to know the greenhouse effect more deeply and to study it from various viewpoints, the study on it in a laboratory scale is important. We have developed a direct measurement system for the infrared back radiation from the carbon dioxide (CO2) gas. The system configuration is similar with that of the practical earth-atmosphere-space system. Using this system, the back radiation from the CO2 gas was directly measured in a laboratory scale, which roughly coincides with meteorologically predicted value.

  8. Radiation Induced Chemistry of Icy Surfaces: Laboratory Simulations

    Science.gov (United States)

    Gudipati, Murthy S.; Lignell, Antti; Li, Irene; Yang, Rui; Jacovi, Ronen

    2011-01-01

    We will discuss laboratory experiments designed to enhance our understanding the chemical processes on icy solar system bodies, enable interpretation of in-situ and remote-sensing data, and help future missions to icy solar system bodies, such as comets, Europa, Ganymede, Enceladus etc.

  9. Experiences in Accreditation of Laboratories in the Field of Radiation Science

    International Nuclear Information System (INIS)

    Franic, Z.; Galjanic, S.; Krizanec, D.

    2011-01-01

    Efficient interaction of technical legislation, metrology, standardization and accreditation within the system of quality infrastructure is precondition for assurance of safety of goods and services as well as protection of humans and environment. In the paper importance of quality infrastructure on national and international levels is presented while special interest is paid to accreditation. Current situation regarding the accreditation of laboratories in the field of radiation science is presented. Regarding this field, in Croatia three laboratories are accredited by Croatian Accreditation Agency: 1. Laboratory for Radioecology, Rudjer Boskovic Institute (Scope: Measurement of radionuclide content in environmental samples and commodities - Including foodstuffs and drinking water) 2. EKOTEH Dozimetrija Ltd., Department for Radiation Protection (Scope: Testing in the scope of ionizing and nonionizing radiation) 3. Radiation Protection Unit, Institute for Medical Research and Occupational Health (Scope: Determination of radioactivity). (author)

  10. Laboratory of research for environmental radiation and its dosimetry in the ININ

    International Nuclear Information System (INIS)

    Chavez S, B.M.

    2003-01-01

    The objectives of this work are to learn on the methodology that should be continued for the investigation of such a specialized topic as it is a radiation laboratory and to develop the executive project of a building that contains laboratories focused to the investigation of the radiation levels in the environment and their dosimetry. The National Institute of Nuclear Research (ININ), is the place where are carried out many of the investigations related to the field of the physics and chemistry in Mexico besides being the center of nuclear research more important of Latin America and it is for that reason that here is proposed the Laboratory of Low Radiation and its Dosimetry, since the Institute accounts with the whole infrastructure and necessary safety for this type of laboratories. (Author)

  11. Simulations of radiative shocks and jet formation in laboratory plasmas

    Energy Technology Data Exchange (ETDEWEB)

    Velarde, P; Gonzalez, M; GarcIa-Fernandez, C; Oliva, E [Instituto de Fusion Nuclear, Universidad Politcnica de Madrid, Madrid (Spain) (Spain); Kasperczuk, A; Pisarczyk, T [Institute of Plasma Physics and Laser Microfusion, Warsaw (Poland) (Poland); Ullschmied, J [Institute of Plasma Physics AS CR, Prague (Czech Republic) (Czech Republic); Stehle, C [LERMA, Observatoire de Paris, Meudon (France) (France); Rus, B [Institute of Physics, PALS Center, Prague (Czech Republic) (Czech Republic); GarcIa-Senz, D; Bravo, E; Relano, A [Departament de Fisica i Enginyeria Nuclear. Universitat Politecnica de Catalunya. Barcelona (Spain) (Spain)], E-mail: velarde@din.upm.es

    2008-05-01

    We present the simulations of two relevant hydrodynamical problems related to astrophysical phenomena performed by three different codes. The numerical results from these codes will be compared in order to test both the numerical method implemented inside them and the influence of the physical phenomena simulated by the codes. Under some conditions laser produced plasmas could be scaled to the typical conditions prevailing in astrophysical plasmas. Therefore, such similarity allows to use existing laser facilities and numerical codes suitable to a laser plasma regime, for studying astrophysical proccesses. The codes are the radiation fluid dynamic 2D ARWEN code and the 3D HERACLES, and, without radiation energy transport, a Smoothed-Particle Hydrodynamics (SPH) code. These codes use different numerical techniques and have overlapping range of application, from laser produced plasmas to astrophysical plasmas. We also present the first laser experiments obtaining cumulative jets with a velocity higher than 100 km/s.

  12. Construction and operation of an improved radiation calibration facility at Brookhaven National Laboratory. Environmental assessment

    International Nuclear Information System (INIS)

    1994-10-01

    Calibration of instruments used to detect and measure ionizing radiation has been conducted over the last 20 years at Brookhaven National Laboratory's (BNL) Radiation Calibration Facility, Building 348. Growth of research facilities, projects in progress, and more stringent Department of Energy (DOE) orders which involve exposure to nuclear radiation have placed substantial burdens on the existing radiation calibration facility. The facility currently does not meet the requirements of DOE Order 5480.4 or American National Standards Institute (ANSI) N323-1978, which establish calibration methods for portable radiation protection instruments used in the detection and measurement of levels of ionizing radiation fields or levels of radioactive surface contaminations. Failure to comply with this standard could mean instrumentation is not being calibrated to necessary levels of sensitivity. The Laboratory has also recently obtained a new neutron source and gamma beam irradiator which can not be made operational at existing facilities because of geometry and shielding inadequacies. These sources are needed to perform routine periodic calibrations of radiation detecting instruments used by scientific and technical personnel and to meet BNL's substantial increase in demand for radiation monitoring capabilities. To place these new sources into operation, it is proposed to construct an addition to the existing radiation calibration facility that would house all calibration sources and bring BNL calibration activities into compliance with DOE and ANSI standards. The purpose of this assessment is to identify potential significant environmental impacts associated with the construction and operation of an improved radiation calibration facility at BNL

  13. Standards for radiation protection and diagnostic radiology at the IAEA Dosimetry Laboratory

    International Nuclear Information System (INIS)

    Pernicka, F.; Andreo, P.; Meghzifene, A.; Czap, L.; Girzikowsky, R.

    1999-01-01

    International standardization in dosimetry is essential for the successful exploitation of radiation technology. The IAEA dosimetry programme is focused into services provided to Member States through the IAEA/WHO Network of Secondary Standard Dosimetry Laboratories (SSDLs), to radiotherapy centres and radiation processing facilities. Radiation protection quantities defined by ICRU and ICRP are used to relate the risk due to exposure to ionizing radiation to a single quantity, irrespective of the type of radiation, which takes into account the human body as a receptor. Two types of quantities, limiting and operational, can be related to basic physical quantities which are defined without need for considering specific aspects of radiation protection, e.g. air kerma for photons and fluence for neutrons. The use of a dosimeter for measurements in radiation protection requires a calibration in terms of a physical quantity together with a conversion from physical into protection quantities by means of a factor or a coefficient

  14. Measurements of energetic particle radiation in transit to Mars on the Mars Science Laboratory.

    Science.gov (United States)

    Zeitlin, C; Hassler, D M; Cucinotta, F A; Ehresmann, B; Wimmer-Schweingruber, R F; Brinza, D E; Kang, S; Weigle, G; Böttcher, S; Böhm, E; Burmeister, S; Guo, J; Köhler, J; Martin, C; Posner, A; Rafkin, S; Reitz, G

    2013-05-31

    The Mars Science Laboratory spacecraft, containing the Curiosity rover, was launched to Mars on 26 November 2011, and for most of the 253-day, 560-million-kilometer cruise to Mars, the Radiation Assessment Detector made detailed measurements of the energetic particle radiation environment inside the spacecraft. These data provide insights into the radiation hazards that would be associated with a human mission to Mars. We report measurements of the radiation dose, dose equivalent, and linear energy transfer spectra. The dose equivalent for even the shortest round-trip with current propulsion systems and comparable shielding is found to be 0.66 ± 0.12 sievert.

  15. The LBL [Lawrence Berkeley Laboratory] 1-2 GeV synchrotron radiation source

    International Nuclear Information System (INIS)

    Cornacchia, M.

    1987-03-01

    A description is presented of the conceptual design of the 1 to 2 GeV Synchrotron Radiation Source proposed for construction at Lawrence Berkeley Laboratory. This facility is designed to produce ultraviolet and soft x-ray radiation. The accelerator complex consists of an injection system (linac plus booster synchrotron) and a low-emittance storage ring optimized for insertion devices. Eleven straight sections are available for undulators and wigglers, and up to 48 photon beam lines may ultimately emanate from bending magnets. Design features of the radiation source are the high brightness of the photon beams, the very short pulses (tens of picoseconds), and the tunability of the radiation

  16. Synchrotron radiation applications in medical research at Brookhaven National Laboratory

    International Nuclear Information System (INIS)

    Thomlinson, W.

    1997-08-01

    In the relatively short time that synchrotrons have been available to the scientific community, their characteristic beams of UV and X-ray radiation have been applied to virtually all areas of medical science which use ionizing radiation. The ability to tune intense monochromatic beams over wide energy ranges clearly differentiates these sources from standard clinical and research tools. The tunable spectrum, high intrinsic collimation of the beams, polarization and intensity of the beams make possible in-vitro and in-vivo research and therapeutic programs not otherwise possible. From the beginning of research operation at the National Synchrotron Light Source (NSLS), many programs have been carrying out basic biomedical research. At first, the research was limited to in-vitro programs such as the x-ray microscope, circular dichroism, XAFS, protein crystallography, micro-tomography and fluorescence analysis. Later, as the coronary angiography program made plans to move its experimental phase from SSRL to the NSLS, it became clear that other in-vivo projects could also be carried out at the synchrotron. The development of SMERF (Synchrotron Medical Research Facility) on beamline X17 became the home not only for angiography but also for the MECT (Multiple Energy Computed Tomography) project for cerebral and vascular imaging. The high energy spectrum on X17 is necessary for the MRT (Microplanar Radiation Therapy) experiments. Experience with these programs and the existence of the Medical Programs Group at the NSLS led to the development of a program in synchrotron based mammography. A recent adaptation of the angiography hardware has made it possible to image human lungs (bronchography). Fig. 1 schematically depicts the broad range of active programs at the NSLS

  17. Construction of a synchrotron radiation research laboratory in Thailand

    International Nuclear Information System (INIS)

    Ishii, Takehiko

    2005-01-01

    Various obstacles encountered during the course of the construction of the synchrotron radiation facilities in Thailand are described. First background information such as the brief history, the purpose of the project, and the human resources development are mentioned. Then difficulty in promoting the new project is described. Some serious problems having emerged and been overcome in the accelerator construction are mentioned. They are non-uniform floor subsidence, the broken injection timing system, the breaking of newly built vacuum chambers, the unstable operation of the linac, and electrical shortage between layers of coils of quadrupole magnets. (author)

  18. Radiation degradation of biological residues (Aflatoxins) produced in food laboratory

    International Nuclear Information System (INIS)

    Rogovschi, Vladimir D.; Aquino, Simone; Nunes, Thaise C.F.; Trindade, Reginaldo A.; Villavicencio, Anna L.C.H.; Zorzete, Patricia; Correa, Benedito

    2007-01-01

    Some molds have the capacity to produce substances that are toxic and generally cancer-causing agents, such as aflatoxins, that stand between the most important carcinogenic substances (class one of the agents which are certainly carcinogenous for human people according to the International Agency for Research on Cancer). Aspergillus spp. is present in world-wide distribution, with predominance in tropical and subtropical regions growing in any substratum. The aim of this work is establish a minimum dose of radiation that degrades aflatoxins produced by fungi Aspergillus spp. The Aspergillus spp. colonies will be cultivated in coconut agar medium and the samples will be conditioned in appropriate bags for irradiation treatment of contaminated material and processed in the Gammacell 220 with dose of 20 kGy. (author)

  19. Radiation degradation of biological residues (Aflatoxins) produced in food laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Rogovschi, Vladimir D.; Aquino, Simone; Nunes, Thaise C.F.; Trindade, Reginaldo A.; Villavicencio, Anna L.C.H. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (brazil)]. E-mails: vladrogo@yahoo.com.br; villavic@ipen.br; Zorzete, Patricia; Correa, Benedito [Universidade de Sao Paulo, SP (Brazil). Inst. de Ciencias Biomedicas]. E-mail: correabe@usp.br

    2007-07-01

    Some molds have the capacity to produce substances that are toxic and generally cancer-causing agents, such as aflatoxins, that stand between the most important carcinogenic substances (class one of the agents which are certainly carcinogenous for human people according to the International Agency for Research on Cancer). Aspergillus spp. is present in world-wide distribution, with predominance in tropical and subtropical regions growing in any substratum. The aim of this work is establish a minimum dose of radiation that degrades aflatoxins produced by fungi Aspergillus spp. The Aspergillus spp. colonies will be cultivated in coconut agar medium and the samples will be conditioned in appropriate bags for irradiation treatment of contaminated material and processed in the Gammacell 220 with dose of 20 kGy. (author)

  20. Stanford Synchrotron Radiation Laboratory. Activity report for 1989

    International Nuclear Information System (INIS)

    1996-01-01

    The April, 1990 SPEAR synchrotron radiation run was one of the two or three best in SSRL's history. High currents were accumulated, ramping went easily, lifetimes were long, beam dumps were infrequent and the average current was 42.9 milliamps. In the one month of operation, 63 different experiments involving 208 scientists from 50 institutions received beam. The end-of-run summary forms completed by the experimenters indicated high levels of user satisfaction with the beam quality and with the outstanding support received from the SSRL technical and scientific staffs. These fine experimental conditions result largely from the SPEAR repairs and improvements performed during the past year and described in Section I. Also quite significant was Max Cornacchia's leadership of the SLAG staff. SPEAR's performance this past April stands in marked contrast to that of the January-March, 1989 run which is also described in Section I. It is, we hope, a harbinger of the operation which will be provided in FY '91, when the SPEAR injector project is completed and SPEAR is fully dedicated to synchrotron radiation research. Over the coming years, SSRL intends to give highest priority to increasing the effectiveness of SPEAR and its various beam lines. The beam line and facility improvements performed during 1989 are described in Section III. In order to concentrate effort on SSRL's three highest priorities prior to the March-April run: (1) to have a successful run, (2) to complete and commission the injector, and (3) to prepare to operate, maintain and improve the SPEAR/injector system, SSRL was reorganized. In the new organization, all the technical staff is contained in three groups: Accelerator Research and Operations Division, Injector Project and Photon Research and Operations Division, as described in Section IV. In spite of the limited effectiveness of the January-March, 1989 run, SSRL's users made significant scientific progress, as described in Section V of this report

  1. Radiation degradation of biological waste (aflatoxins) produced in food laboratory

    International Nuclear Information System (INIS)

    Rogovschi, Vladimir Dias

    2009-01-01

    Many filamentous fungi can produce secondary metabolites, called mycotoxins, which can be found in food and agricultural products. One of the main genera of myco toxigenic fungi related to the food chain is the Aspergillus spp. There are over 400 mycotoxins described in the literature, the most common the aflatoxins B1, B2, G1 and G2. The mycotoxins are commonly found in foods and are considered one of the most dangerous contaminants. The aflatoxin B1 is classified in group one by the International Agency of Research on Cancer. Aflatoxins resisting for more than one hour in autoclave making it necessary to other means of degradation of these toxins. This work aimed to observe the effects of gamma radiation of 60 Co and electron beams in the degradation of aflatoxins and compare the damage caused on the morphology of the Aspergillus flavus. The fungus was grown on potato dextrose agar (PDA) for 10 days and was subsequently transferred to coconut agar medium, and maintained for 14 days at 25 degree C. After this step the coconut agar was ground to become a homogeneous pasty and was irradiated with doses of 2.5, 5.0, 10 and 20 kGy. The samples used in scanning electron microscopy were irradiated with doses of 0, 2.5, 5.0, 10 and 20 kGy with sources of 60 Co and electron beams. Irradiation with electron accelerator showed a slightly higher degradation to gamma radiation, reducing 29.93 %, 34.50 %, 52.63 % and 72.30 % for doses of 2.5, 5.0, 10 and 20 kGy, respectively. The Scanning Electron Microscopy showed that doses of 2.5 to 10 kGy did not cause damage to the fungus, but with a dose of 20 kGy it can be observed fungal damage to structures. (author)

  2. Stanford Synchrotron Radiation Laboratory. Activity report for 1988

    Energy Technology Data Exchange (ETDEWEB)

    Cantwell, K. [ed.

    1996-01-01

    For SSRL operations, 1988 was a year of stark contrasts. The first extended PEP parasitic running since the construction of our two beam lines on that storage ring took place in November and December. Four experiments discussed below, were performed and detailed operational procedures which allowed synchrotron radiation an high energy users to coexist were established. SSRL anticipates that there will be significant amounts of beam time when PEP is run again for high energy physics. On the other hand, activity on SPEAR consisted of brief parasitic running on the VUV lines in December when the ring was operated at 1.85 GeV for colliding beam experiments. There was no dedicated SPEAR running throughout the entire calendar year. This is the first time since dedicated SPEAR operation was initiated in 1980 that there was no such running. The decision was motivated by both cost and performance factors, as discussed in Section 1 of this report. Fortunately, SLAC and SSRL have reached an agreement on SPEAR and PEP dedicated time charges which eliminates the cost volatility which was so important in the cancellation of the June-July dedicated SPEAR run. As discussed in Section 2, the 3 GeV SPEAR injector construction is proceeding on budget and on schedule. The injector will overcome the difficulties associated with the SLC-era constraint of only two injections per day. SSR and SLAC have also embarked on a program to upgrade SPEAR to achieve high reliability and performance. As a consequence, SSRL`s users may anticipate a highly effective SPEAR by 1991, at the latest. At that time, SPEAR is expected to be fully dedicated to synchrotron radiation research and operated by SSRL. Also contained in this report is a discussion of the improvements to SSRL`s experimental facilities and highlights of the experiments of the past year.

  3. Stanford Synchrotron Radiation Laboratory activity report for 1986

    Energy Technology Data Exchange (ETDEWEB)

    Cantwell, K. [ed.

    1987-12-31

    1986 was another year of major advances for SSRL as the ultimate capabilities of PEP as a synchrotron radiation source became more apparent and a second PEP beam line was initiated, while effective development and utilization of SPEAR proceeded. Given these various PEP developments, SSRL abandoned its plans for a separate diffraction limited ring, as they abandoned their plans for a 6--7 GeV ring of the APS type last year. It has become increasingly apparent that SSRL should concentrate on developing SPEAR and PEP as synchrotron radiation sources. Consequently, initial planning for a 3 GeV booster synchrotron injector for SPEAR was performed in 1986, with a proposal to the Department of Energy resulting. As described in Chapter 2, the New Rings Group and the Machine Physics Group were combined into one Accelerator Physics Group. This group is focusing mainly on the improvement of SPEAR`s operating conditions and on planning for the conversion of PEP into a fourth generation x-ray source. Considerable emphasis is also being given to the training of accelerator physics graduate students. At the same time, several improvements of SSRL`s existing facilities were made. These are described in Chapter 3. Chapter 4 describes new SSRL beam lines being commissioned. Chapter 5 discusses SSRL`s present construction projects. Chapter 6 discusses a number of projects presently underway in the engineering division. Chapter 7 describes SSRL`s advisory panels while Chapter 8 discusses SSRL`s overall organization. Chapter 9 describes the experimental progress reports.

  4. Stanford Synchrotron Radiation Laboratory. Activity report for 1988

    International Nuclear Information System (INIS)

    Cantwell, K.

    1996-01-01

    For SSRL operations, 1988 was a year of stark contrasts. The first extended PEP parasitic running since the construction of our two beam lines on that storage ring took place in November and December. Four experiments discussed below, were performed and detailed operational procedures which allowed synchrotron radiation an high energy users to coexist were established. SSRL anticipates that there will be significant amounts of beam time when PEP is run again for high energy physics. On the other hand, activity on SPEAR consisted of brief parasitic running on the VUV lines in December when the ring was operated at 1.85 GeV for colliding beam experiments. There was no dedicated SPEAR running throughout the entire calendar year. This is the first time since dedicated SPEAR operation was initiated in 1980 that there was no such running. The decision was motivated by both cost and performance factors, as discussed in Section 1 of this report. Fortunately, SLAC and SSRL have reached an agreement on SPEAR and PEP dedicated time charges which eliminates the cost volatility which was so important in the cancellation of the June-July dedicated SPEAR run. As discussed in Section 2, the 3 GeV SPEAR injector construction is proceeding on budget and on schedule. The injector will overcome the difficulties associated with the SLC-era constraint of only two injections per day. SSR and SLAC have also embarked on a program to upgrade SPEAR to achieve high reliability and performance. As a consequence, SSRL's users may anticipate a highly effective SPEAR by 1991, at the latest. At that time, SPEAR is expected to be fully dedicated to synchrotron radiation research and operated by SSRL. Also contained in this report is a discussion of the improvements to SSRL's experimental facilities and highlights of the experiments of the past year

  5. Stanford Synchrotron Radiation Laboratory. Activity report for 1989

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-01-01

    The April, 1990 SPEAR synchrotron radiation run was one of the two or three best in SSRL`s history. High currents were accumulated, ramping went easily, lifetimes were long, beam dumps were infrequent and the average current was 42.9 milliamps. In the one month of operation, 63 different experiments involving 208 scientists from 50 institutions received beam. The end-of-run summary forms completed by the experimenters indicated high levels of user satisfaction with the beam quality and with the outstanding support received from the SSRL technical and scientific staffs. These fine experimental conditions result largely from the SPEAR repairs and improvements performed during the past year and described in Section I. Also quite significant was Max Cornacchia`s leadership of the SLAG staff. SPEAR`s performance this past April stands in marked contrast to that of the January-March, 1989 run which is also described in Section I. It is, we hope, a harbinger of the operation which will be provided in FY `91, when the SPEAR injector project is completed and SPEAR is fully dedicated to synchrotron radiation research. Over the coming years, SSRL intends to give highest priority to increasing the effectiveness of SPEAR and its various beam lines. The beam line and facility improvements performed during 1989 are described in Section III. In order to concentrate effort on SSRL`s three highest priorities prior to the March-April run: (1) to have a successful run, (2) to complete and commission the injector, and (3) to prepare to operate, maintain and improve the SPEAR/injector system, SSRL was reorganized. In the new organization, all the technical staff is contained in three groups: Accelerator Research and Operations Division, Injector Project and Photon Research and Operations Division, as described in Section IV. In spite of the limited effectiveness of the January-March, 1989 run, SSRL`s users made significant scientific progress, as described in Section V of this report.

  6. The spectra of the standard x-ray qualities used in STUK's Radiation Metrology Laboratory

    International Nuclear Information System (INIS)

    Tapiovaara, T.; Tapiovaara, M.; Siiskonen, T.; Hakanen, A.

    2008-02-01

    This report presents the fluence spectra of the standard x-radiation qualities used in the Radiation Dosimetry Laboratory of Radiation and Nuclear Safety Authority (STUK). The spectra were measured in August 2007. The radiation qualities characterised in the report are the ISO Narrow spectrum series (ISO N10-N200, ISO 4037-1:1996) and both of the RQR-spectrum series specified by the IEC (IEC 1267:1994 and IEC 61267:2005). The measurements were made using a high purity Ge-detector and the measured pulse height spectra were corrected to fluence spectra. Spectral characteristics were computed from the spectral data and compared to the requirements in the standards and to the values given in the quality manual of the laboratory. (orig.)

  7. Guidelines for Member States concerning radiation measurement standards and Secondary Standard Dosimetry Laboratories

    International Nuclear Information System (INIS)

    1986-01-01

    In the early nineteen-sixties an acute need developed for higher dosimetric accuracy in radiation therapy, particularly in developing countries. This need led to the establishment of a number of dosimetry laboratories around the world, specializing in the calibration of radiation therapy dosimeters. In order to co-ordinate the provision of guidance and assistance to such laboratories, the International Atomic Energy Agency (IAEA) and the World Health Organization (WHO) set up a Network of Secondary Standard Dosimetry Laboratories (SSDLs) under their joint aegis, as described in the IAEA booklet 'SSDLs: Development and Trends' (1985). This publication includes detailed criteria for the establishment of these laboratories. The present guidelines deal with the functions and status of SSDLs, in particular with the need for recognition and support by the competent national authorities. (author)

  8. Technical qualification requirements and training programs for radiation protection personnel at Oak Ridge National Laboratory

    International Nuclear Information System (INIS)

    Copenhaver, E.D.; Houser, B.S.; Butler, H.M. Jr.; Bogard, J.S.; Fair, M.F.; Haynes, C.E.; Parzyck, D.C.

    1986-04-01

    This document deals with the policies and practices of the Environmental and Occupational Safety Division (EOSD) at the Oak Ridge National Laboratory (ORNL) in regard to the selection, training, qualification, and requalification of radiation protection staff assigned to reactor and nonreactor nuclear facilities. Included are personnel at facilities that: (1) operate reactors or particle accelerators; (2) produce, process, or store radioactive liquid or solid waste; (3) conduct separations operations; (4) engage in research with radioactive materials and radiation sources; and (5) conduct irradiated materials inspection, fuel fabrication, deconamination, or recovery operations. The EOSD personnel also have environmental surveillance and operational and industrial safety responsibilities related to the total Laboratory

  9. The role of the IAEA Dosimetry Laboratory in the dissemination of standards for radiation protection

    International Nuclear Information System (INIS)

    Czap, L.; Andreo, P.; Matscheko, G.

    1998-01-01

    Approximately 90% of the Secondary Standard Dosimetry Laboratories (SSDLs) provide users with calibrations of radiation protection instruments, and the IAEA is taking every necessary effort to insure that SSDLs measurements are traceable to Primary Standards. The Agency has proper radiation sources available to provide traceable calibrations to the SSDLs involved in measurements on diagnostic x-ray generators, including an x-ray unit specifically for mammography dedicated to standardization procedures. The different photon beam qualities and calibration procedures available in the Agency's Dosimetry Laboratory are described

  10. Ambient radiation levels in a microPET/CT research laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Sarmento, D.M.; Rodrigues, D.L.; Sanches, M.P.; Carneiro, J.C.G.G., E-mail: janetegc@ipen.br [Instituto de Pesquisas Energeticas e Nucleres (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2015-07-01

    This study focuses on initial radiological evaluation and the exposure situation related to the worker task in a micro-positron emission tomography/computed tomography laboratory (microPET/CT). Selected and calibrated thermoluminescent dosimeters, TLD, of CaSO{sub 4}:Dy were used to measure room radiation levels. The detectors were placed in several selected points inside the microPET/CT laboratory and adjacent rooms. In addition, the occupationally exposed workers were monthly evaluated for external and internal exposures. In none of the selected points the dose values exceeded the radiation dose limit established for supervised area, as well as the values obtained in individual monitoring. (author)

  11. Ambient radiation levels in a microPET/CT research laboratory

    International Nuclear Information System (INIS)

    Sarmento, D.M.; Rodrigues, D.L.; Sanches, M.P.; Carneiro, J.C.G.G.

    2015-01-01

    This study focuses on initial radiological evaluation and the exposure situation related to the worker task in a micro-positron emission tomography/computed tomography laboratory (microPET/CT). Selected and calibrated thermoluminescent dosimeters, TLD, of CaSO 4 :Dy were used to measure room radiation levels. The detectors were placed in several selected points inside the microPET/CT laboratory and adjacent rooms. In addition, the occupationally exposed workers were monthly evaluated for external and internal exposures. In none of the selected points the dose values exceeded the radiation dose limit established for supervised area, as well as the values obtained in individual monitoring. (author)

  12. Radiation Laboratory quarterly report, January 1, 1977--March 31, 1977

    Energy Technology Data Exchange (ETDEWEB)

    1978-08-12

    Some of the studies in progress are: distribution of deposited energy around heavy-ion tracks; effect of trapping on the thermalization of electrons in hydrocarbon liquids; effect of field-dependent mobility on escape probability; kinetics of electron scavenging reactions; second-order optical properties of solvated electrons; model molecular orbital studies of the chemisorption of atomic hydrogen and oxygen on aluminum surfaces; calculation of sum rule moments for H/sub 2/O; early events in pulse-irradiated polar liquids; radiation chemical studies of reactions of SO/sub 4//sup -/ radicals with organic compounds; reactions of the phosphate and sulfate radicals with inorganic compounds; pulse radiolysis studies of antioxidants in fatty acid soap aggregates; spectrophotometric pulse radiolytic study of the radicals produced by reduction of cis- and trans-azobenzene; correlation of singlet energies of aromatic hydrocarbons with the rates of protonation of their anion radicals; the association rate of sodium laurylsulfate micelle-monomer equilibrium; transfer of an organic molecule between micelles in an aqueous environment; in-situ photolysis ESR study of some reactions of phosphate radicals; photochemistry of sydnones; differentiation of triplet state and biradical reactions; photoenolization of aromatic ketones; and studies of Ni(III) macrocyclic ligand complexes. (LK)

  13. Effect of ultraviolet radiation on laboratory cultures of green algae and cyanobacteria

    International Nuclear Information System (INIS)

    Palffy, K.; Ordog, V.; Voros, L.

    2004-01-01

    Since the discovery of the ozone hole, an increasing amount of work has been devoted to measuring the impact of the UV-radiation on living organisms. In this point of view, algae as the primer producers of aquatic ecosystems, get to the central part of the interest. The aim of the study was to study the effect of ultraviolet radiation on laboratory cultures of green algae and cyanobacteria

  14. Trends in instrumentation for environmental radiation measurements at Los Alamos Scientific Laboratory

    International Nuclear Information System (INIS)

    Hiebert, R.D.; Wolf, M.A.

    1980-01-01

    Recent instruments developed to fulfill radiation monitoring needs at Los Alamos Scientific Laboratory are described. Laboratory instruments that measure tritium gas effluents alone, or in the presence of activated air from D-T fusion reactors are discussed. Fully portable systems for gamma, x-ray, and alpha analyses in the field are described. Also included are descriptions of survey instruments that measure low levels of transuranic contaminants and that measure pulsed-neutron dose rates

  15. Exercise for laboratory comparison of calibration coefficient in 137Cs beam, radiation protection - 2013/2014

    International Nuclear Information System (INIS)

    Cabral, T.S.; Potiens, M.P.A.; Soares, C.M.A.; Silveira, R.R.; Khoury, H.; Borges, J.C.

    2015-01-01

    This work deals with the preliminary results of the second exercise of comparing the radiation monitors calibration laboratories in Brazil. The exercise involved eight laboratories and the measured quantity is the air kerma in a beam of 137 Cs for radioprotection. The exercise was conducted by the LNMRI/IRD, in a star shaped arrangement from October 2013 to July 2015. The largest deviation was 2% of the calibration coefficient that is acceptable for applications in radioprotection. (author)

  16. Image noise reduction technology reduces radiation in a radial-first cardiac catheterization laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Gunja, Ateka; Pandey, Yagya [Department of Veterans Affairs, Jesse Brown VA Medical Center, Chicago, IL (United States); Division of Cardiology, Department of Medicine, University of Illinois at Chicago, Chicago, IL (United States); Xie, Hui [Division of Epidemiology and Biostatistics, University of Illinois at Chicago, Chicago, IL (United States); Faculty of Health Sciences, Simon Fraser University, Burnaby, BC (Canada); Wolska, Beata M. [Department of Physiology and Biophysics, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL (United States); Shroff, Adhir R.; Ardati, Amer K. [Department of Veterans Affairs, Jesse Brown VA Medical Center, Chicago, IL (United States); Division of Cardiology, Department of Medicine, University of Illinois at Chicago, Chicago, IL (United States); Vidovich, Mladen I., E-mail: miv@uic.edu [Department of Veterans Affairs, Jesse Brown VA Medical Center, Chicago, IL (United States); Division of Cardiology, Department of Medicine, University of Illinois at Chicago, Chicago, IL (United States)

    2017-04-15

    Background: Transradial coronary angiography (TRA) has been associated with increased radiation doses. We hypothesized that contemporary image noise reduction technology would reduce radiation doses in the cardiac catheterization laboratory in a typical clinical setting. Methods and results: We performed a single-center, retrospective analysis of 400 consecutive patients who underwent diagnostic and interventional cardiac catheterizations in a predominantly TRA laboratory with traditional fluoroscopy (N = 200) and a new image noise reduction fluoroscopy system (N = 200). The primary endpoint was radiation dose (mGy cm{sup 2}). Secondary endpoints were contrast dose, fluoroscopy times, number of cineangiograms, and radiation dose by operator between the two study periods. Radiation was reduced by 44.7% between the old and new cardiac catheterization laboratory (75.8 mGy cm{sup 2} ± 74.0 vs. 41.9 mGy cm{sup 2} ± 40.7, p < 0.0001). Radiation was reduced for both diagnostic procedures (45.9%, p < 0.0001) and interventional procedures (37.7%, p < 0.0001). There was no statistically significant difference in radiation dose between individual operators (p = 0.84). In multivariate analysis, radiation dose remained significantly decreased with the use of the new system (p < 0.0001) and was associated with weight (p < 0.0001), previous coronary artery bypass grafting (p < 0.0007) and greater than 3 stents used (p < 0.0004). TRA was used in 90% of all cases in both periods. Compared with a transfemoral approach (TFA), TRA was not associated with higher radiation doses (p = 0.20). Conclusions: Image noise reduction technology significantly reduces radiation dose in a contemporary radial-first cardiac catheterization clinical practice. - Highlights: • Radial arterial access has been associated with higher doses compared to femoral access. • In a radial-first cardiac catheterization laboratory (90% radial) we examined radiation doses reduction with a contemporary image

  17. Image noise reduction technology reduces radiation in a radial-first cardiac catheterization laboratory

    International Nuclear Information System (INIS)

    Gunja, Ateka; Pandey, Yagya; Xie, Hui; Wolska, Beata M.; Shroff, Adhir R.; Ardati, Amer K.; Vidovich, Mladen I.

    2017-01-01

    Background: Transradial coronary angiography (TRA) has been associated with increased radiation doses. We hypothesized that contemporary image noise reduction technology would reduce radiation doses in the cardiac catheterization laboratory in a typical clinical setting. Methods and results: We performed a single-center, retrospective analysis of 400 consecutive patients who underwent diagnostic and interventional cardiac catheterizations in a predominantly TRA laboratory with traditional fluoroscopy (N = 200) and a new image noise reduction fluoroscopy system (N = 200). The primary endpoint was radiation dose (mGy cm"2). Secondary endpoints were contrast dose, fluoroscopy times, number of cineangiograms, and radiation dose by operator between the two study periods. Radiation was reduced by 44.7% between the old and new cardiac catheterization laboratory (75.8 mGy cm"2 ± 74.0 vs. 41.9 mGy cm"2 ± 40.7, p < 0.0001). Radiation was reduced for both diagnostic procedures (45.9%, p < 0.0001) and interventional procedures (37.7%, p < 0.0001). There was no statistically significant difference in radiation dose between individual operators (p = 0.84). In multivariate analysis, radiation dose remained significantly decreased with the use of the new system (p < 0.0001) and was associated with weight (p < 0.0001), previous coronary artery bypass grafting (p < 0.0007) and greater than 3 stents used (p < 0.0004). TRA was used in 90% of all cases in both periods. Compared with a transfemoral approach (TFA), TRA was not associated with higher radiation doses (p = 0.20). Conclusions: Image noise reduction technology significantly reduces radiation dose in a contemporary radial-first cardiac catheterization clinical practice. - Highlights: • Radial arterial access has been associated with higher doses compared to femoral access. • In a radial-first cardiac catheterization laboratory (90% radial) we examined radiation doses reduction with a contemporary image-noise compared to

  18. Note on the preliminar proposal of the feasibility study for the implantation of a national laboratory of synchrotron radiation

    International Nuclear Information System (INIS)

    Lobo, R.; Muniz, R.P.A.

    1983-01-01

    Some socio-economic and political aspects on the implantation of a National Laboratory of Synchrotron Radiation in Brazil are discussed. Some applications of such a radiation, including technological ones, are presented. (L.C.) [pt

  19. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, (No. 26)

    International Nuclear Information System (INIS)

    1994-03-01

    The annual research activities of Osaka Laboratory for Radiation Chemistry, JAERI during the fiscal year of 1992 (April 1, 1992 - March 31, 1993) are described. The research activities were conducted under the two research programs: the study on laser-induced organic chemical reactions and the study on basic radiation technology for functional materials. Detailed descriptions of the activities are presented in the following subjects: laser-induced organic synthesis, modification of polymer surface by laser irradiation, radiation-induced polymerization, preparation of fine particles by gamma ray irradiation, and electron beam dosimetry. The operation report of the irradiation facilities is also included. (author)

  20. Laboratory and Feasibility Study for Industrial Wastewater Effluents Treatment by Radiation

    Energy Technology Data Exchange (ETDEWEB)

    Zimek, Z.; Głuszewski, W. [Centre for Radiation Research and Technology, Institute of Nuclear Chemistry and Technology, Warsaw (Poland)

    2012-07-01

    The study of wastewater treatment by radiation regarding chemical processes contribution and physical-chemical separation of highly concentrated non-organic pollutants deposited in specific industrial waste are proposed. Laboratory stand should be build and the study should be performed to confirm possible mechanism of the sedimentation process of nonorganic pollutants during separation initiated by ionizing radiation. Evaluation from technical and economical point of view of this specific radiation technology and feasibility study preparation for industrial facility will be the main output at the final stage of the project. (author)

  1. Laboratory and Feasibility Study for Industrial Wastewater Effluents Treatment by Radiation

    International Nuclear Information System (INIS)

    Zimek, Z.; Głuszewski, W.

    2012-01-01

    The study of wastewater treatment by radiation regarding chemical processes contribution and physical-chemical separation of highly concentrated non-organic pollutants deposited in specific industrial waste are proposed. Laboratory stand should be build and the study should be performed to confirm possible mechanism of the sedimentation process of nonorganic pollutants during separation initiated by ionizing radiation. Evaluation from technical and economical point of view of this specific radiation technology and feasibility study preparation for industrial facility will be the main output at the final stage of the project. (author)

  2. Sample tracking in an automated cytogenetic biodosimetry laboratory for radiation mass casualties

    International Nuclear Information System (INIS)

    Martin, P.R.; Berdychevski, R.E.; Subramanian, U.; Blakely, W.F.; Prasanna, P.G.S.

    2007-01-01

    Chromosome-aberration-based dicentric assay is expected to be used after mass-casualty life-threatening radiation exposures to assess radiation dose to individuals. This will require processing of a large number of samples for individual dose assessment and clinical triage to aid treatment decisions. We have established an automated, high-throughput, cytogenetic biodosimetry laboratory to process a large number of samples for conducting the dicentric assay using peripheral blood from exposed individuals according to internationally accepted laboratory protocols (i.e., within days following radiation exposures). The components of an automated cytogenetic biodosimetry laboratory include blood collection kits for sample shipment, a cell viability analyzer, a robotic liquid handler, an automated metaphase harvester, a metaphase spreader, high-throughput slide stainer and coverslipper, a high-throughput metaphase finder, multiple satellite chromosome-aberration analysis systems, and a computerized sample-tracking system. Laboratory automation using commercially available, off-the-shelf technologies, customized technology integration, and implementation of a laboratory information management system (LIMS) for cytogenetic analysis will significantly increase throughput. This paper focuses on our efforts to eliminate data-transcription errors, increase efficiency, and maintain samples' positive chain-of-custody by sample tracking during sample processing and data analysis. This sample-tracking system represents a 'beta' version, which can be modeled elsewhere in a cytogenetic biodosimetry laboratory, and includes a customized LIMS with a central server, personal computer workstations, barcode printers, fixed station and wireless hand-held devices to scan barcodes at various critical steps, and data transmission over a private intra-laboratory computer network. Our studies will improve diagnostic biodosimetry response, aid confirmation of clinical triage, and medical

  3. Sample tracking in an automated cytogenetic biodosimetry laboratory for radiation mass casualties

    Energy Technology Data Exchange (ETDEWEB)

    Martin, P.R.; Berdychevski, R.E.; Subramanian, U.; Blakely, W.F. [Armed Forces Radiobiology Research Institute, Uniformed Services University of Health Sciences, 8901 Wisconsin Avenue, Bethesda, MD 20889-5603 (United States); Prasanna, P.G.S. [Armed Forces Radiobiology Research Institute, Uniformed Services University of Health Sciences, 8901 Wisconsin Avenue, Bethesda, MD 20889-5603 (United States)], E-mail: prasanna@afrri.usuhs.mil

    2007-07-15

    Chromosome-aberration-based dicentric assay is expected to be used after mass-casualty life-threatening radiation exposures to assess radiation dose to individuals. This will require processing of a large number of samples for individual dose assessment and clinical triage to aid treatment decisions. We have established an automated, high-throughput, cytogenetic biodosimetry laboratory to process a large number of samples for conducting the dicentric assay using peripheral blood from exposed individuals according to internationally accepted laboratory protocols (i.e., within days following radiation exposures). The components of an automated cytogenetic biodosimetry laboratory include blood collection kits for sample shipment, a cell viability analyzer, a robotic liquid handler, an automated metaphase harvester, a metaphase spreader, high-throughput slide stainer and coverslipper, a high-throughput metaphase finder, multiple satellite chromosome-aberration analysis systems, and a computerized sample-tracking system. Laboratory automation using commercially available, off-the-shelf technologies, customized technology integration, and implementation of a laboratory information management system (LIMS) for cytogenetic analysis will significantly increase throughput. This paper focuses on our efforts to eliminate data-transcription errors, increase efficiency, and maintain samples' positive chain-of-custody by sample tracking during sample processing and data analysis. This sample-tracking system represents a 'beta' version, which can be modeled elsewhere in a cytogenetic biodosimetry laboratory, and includes a customized LIMS with a central server, personal computer workstations, barcode printers, fixed station and wireless hand-held devices to scan barcodes at various critical steps, and data transmission over a private intra-laboratory computer network. Our studies will improve diagnostic biodosimetry response, aid confirmation of clinical triage, and

  4. 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.)

  5. Radiation chemistry in the nuclear power reactor environment: from laboratory study to practical application

    International Nuclear Information System (INIS)

    Stuart, C.R.

    1999-01-01

    This paper discusses the work carried out at the Chalk River Nuclear Laboratories in underlying and applied radiation chemical research performed to optimise the processes occurring in the four aqueous systems in and around the core. The aqueous systems subject to radiolysis in CANDU reactors are Heat Transport System, Moderator, Liquid Zone Controls and End Shields.

  6. 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.)

  7. Real-time dosimetry system in catheterisation laboratory: utility as a learning tool in radiation protection

    International Nuclear Information System (INIS)

    Pinto Monedero, M.; Rodriguez Cobo, C.; Pifarre Martinez, X.; Ruiz Martin, J.; Barros Candelero, J.M.; Goicolea Ruigomez, J.; Diaz Blaires, G.; Garcia Lunar, I.

    2015-01-01

    Document available in abstract form only. Full text of publication follows: Workers at the catheter laboratory are among the most exposed to ionising radiation in hospitals. However, it is difficult to be certain of the radiation doses received by the staff, as personal dosemeters are often misused, and thus, the dose history is not reliable. Moreover, the information provided by personal dosemeters corresponds to the monthly accumulated dose, so corrective actions tends to be delayed. The purpose of this work is, on the one hand, to use a real-time dosimetry system to establish the occupational doses per procedure of workers at the catheter laboratories and, on the other hand, to evaluate its utility as a learning tool for radiation protection purposes with the simultaneous video recording of the interventions. (authors)

  8. Synchrotron radiation laboratories at the Bonn electron accelerators. a status report

    Science.gov (United States)

    Hormes, J.

    1987-07-01

    At the Physikalisches Institut of the University in Bonn experiments with synchrotron radiation were carried out ever since 1962. At the moment (June 1986) all work takes place in the SR-laboratory at the 2.5 GeV synchrotron. A 3.5 GeV stretcher ring (ELSA) is under construction and will come into operation at the end of 1986. This accelerator will also run as a storage ring for synchrotron radiation experiments and a laboratory to be used at this machine is also under consideration. The SR experiments which are carried out in Bonn try to take advantage of the fact that we are still using a high energy synchrotron for our work. Besides basic research also applied work is done using synchrotron radiation even as a production tool for X-ray lithography.

  9. Mars' Surface Radiation Environment Measured with the Mars Science Laboratory's Curiosity Rover

    Science.gov (United States)

    Hassler, Donald M.; Zeitlin, Cary; Wimmer-Schweingruber, Robert F.; Ehresmann, Bent; Rafkin, Scot; Eigenbrode, Jennifer L.; Brinza, David E.; Weigle, Gerald; Böttcher, Stephan; Böhm, Eckart; Burmeister, Soenke; Guo, Jingnan; Köhler, Jan; Martin, Cesar; Reitz, Guenther; Cucinotta, Francis A.; Kim, Myung-Hee; Grinspoon, David; Bullock, Mark A.; Posner, Arik; Gómez-Elvira, Javier; Vasavada, Ashwin; Grotzinger, John P.; MSL Science Team; Kemppinen, Osku; Cremers, David; Bell, James F.; Edgar, Lauren; Farmer, Jack; Godber, Austin; Wadhwa, Meenakshi; Wellington, Danika; McEwan, Ian; Newman, Claire; Richardson, Mark; Charpentier, Antoine; Peret, Laurent; King, Penelope; Blank, Jennifer; Schmidt, Mariek; Li, Shuai; Milliken, Ralph; Robertson, Kevin; Sun, Vivian; Baker, Michael; Edwards, Christopher; Ehlmann, Bethany; Farley, Kenneth; Griffes, Jennifer; Miller, Hayden; Newcombe, Megan; Pilorget, Cedric; Rice, Melissa; Siebach, Kirsten; Stack, Katie; Stolper, Edward; Brunet, Claude; Hipkin, Victoria; Léveillé, Richard; Marchand, Geneviève; Sánchez, Pablo Sobrón; Favot, Laurent; Cody, George; Steele, Andrew; Flückiger, Lorenzo; Lees, David; Nefian, Ara; Martin, Mildred; Gailhanou, Marc; Westall, Frances; Israël, Guy; Agard, Christophe; Baroukh, Julien; Donny, Christophe; Gaboriaud, Alain; Guillemot, Philippe; Lafaille, Vivian; Lorigny, Eric; Paillet, Alexis; Pérez, René; Saccoccio, Muriel; Yana, Charles; Armiens-Aparicio, Carlos; Rodríguez, Javier Caride; Blázquez, Isaías Carrasco; Gómez, Felipe Gómez; Hettrich, Sebastian; Malvitte, Alain Lepinette; Jiménez, Mercedes Marín; Martínez-Frías, Jesús; Martín-Soler, Javier; Martín-Torres, F. Javier; Jurado, Antonio Molina; Mora-Sotomayor, Luis; Caro, Guillermo Muñoz; López, Sara Navarro; Peinado-González, Verónica; Pla-García, Jorge; Manfredi, José Antonio Rodriguez; Romeral-Planelló, Julio José; Fuentes, Sara Alejandra Sans; Martinez, Eduardo Sebastian; Redondo, Josefina Torres; Urqui-O'Callaghan, Roser; Mier, María-Paz Zorzano; Chipera, Steve; Lacour, Jean-Luc; Mauchien, Patrick; Sirven, Jean-Baptiste; Manning, Heidi; Fairén, Alberto; Hayes, Alexander; Joseph, Jonathan; Squyres, Steven; Sullivan, Robert; Thomas, Peter; Dupont, Audrey; Lundberg, Angela; Melikechi, Noureddine; Mezzacappa, Alissa; Berger, Thomas; Matthia, Daniel; Prats, Benito; Atlaskin, Evgeny; Genzer, Maria; Harri, Ari-Matti; Haukka, Harri; Kahanpää, Henrik; Kauhanen, Janne; Kemppinen, Osku; Paton, Mark; Polkko, Jouni; Schmidt, Walter; Siili, Tero; Fabre, Cécile; Wray, James; Wilhelm, Mary Beth; Poitrasson, Franck; Patel, Kiran; Gorevan, Stephen; Indyk, Stephen; Paulsen, Gale; Gupta, Sanjeev; Bish, David; Schieber, Juergen; Gondet, Brigitte; Langevin, Yves; Geffroy, Claude; Baratoux, David; Berger, Gilles; Cros, Alain; d'Uston, Claude; Forni, Olivier; Gasnault, Olivier; Lasue, Jérémie; Lee, Qiu-Mei; Maurice, Sylvestre; Meslin, Pierre-Yves; Pallier, Etienne; Parot, Yann; Pinet, Patrick; Schröder, Susanne; Toplis, Mike; Lewin, Éric; Brunner, Will; Heydari, Ezat; Achilles, Cherie; Oehler, Dorothy; Sutter, Brad; Cabane, Michel; Coscia, David; Israël, Guy; Szopa, Cyril; Dromart, Gilles; Robert, François; Sautter, Violaine; Le Mouélic, Stéphane; Mangold, Nicolas; Nachon, Marion; Buch, Arnaud; Stalport, Fabien; Coll, Patrice; François, Pascaline; Raulin, François; Teinturier, Samuel; Cameron, James; Clegg, Sam; Cousin, Agnès; DeLapp, Dorothea; Dingler, Robert; Jackson, Ryan Steele; Johnstone, Stephen; Lanza, Nina; Little, Cynthia; Nelson, Tony; Wiens, Roger C.; Williams, Richard B.; Jones, Andrea; Kirkland, Laurel; Treiman, Allan; Baker, Burt; Cantor, Bruce; Caplinger, Michael; Davis, Scott; Duston, Brian; Edgett, Kenneth; Fay, Donald; Hardgrove, Craig; Harker, David; Herrera, Paul; Jensen, Elsa; Kennedy, Megan R.; Krezoski, Gillian; Krysak, Daniel; Lipkaman, Leslie; Malin, Michael; McCartney, Elaina; McNair, Sean; Nixon, Brian; Posiolova, Liliya; Ravine, Michael; Salamon, Andrew; Saper, Lee; Stoiber, Kevin; Supulver, Kimberley; Van Beek, Jason; Van Beek, Tessa; Zimdar, Robert; French, Katherine Louise; Iagnemma, Karl; Miller, Kristen; Summons, Roger; Goesmann, Fred; Goetz, Walter; Hviid, Stubbe; Johnson, Micah; Lefavor, Matthew; Lyness, Eric; Breves, Elly; Dyar, M. Darby; Fassett, Caleb; Blake, David F.; Bristow, Thomas; DesMarais, David; Edwards, Laurence; Haberle, Robert; Hoehler, Tori; Hollingsworth, Jeff; Kahre, Melinda; Keely, Leslie; McKay, Christopher; Wilhelm, Mary Beth; Bleacher, Lora; Brinckerhoff, William; Choi, David; Conrad, Pamela; Dworkin, Jason P.; Floyd, Melissa; Freissinet, Caroline; Garvin, James; Glavin, Daniel; Harpold, Daniel; Jones, Andrea; Mahaffy, Paul; Martin, David K.; McAdam, Amy; Pavlov, Alexander; Raaen, Eric; Smith, Michael D.; Stern, Jennifer; Tan, Florence; Trainer, Melissa; Meyer, Michael; Voytek, Mary; Anderson, Robert C.; Aubrey, Andrew; Beegle, Luther W.; Behar, Alberto; Blaney, Diana; Calef, Fred; Christensen, Lance; Crisp, Joy A.; DeFlores, Lauren; Ehlmann, Bethany; Feldman, Jason; Feldman, Sabrina; Flesch, Gregory; Hurowitz, Joel; Jun, Insoo; Keymeulen, Didier; Maki, Justin; Mischna, Michael; Morookian, John Michael; Parker, Timothy; Pavri, Betina; Schoppers, Marcel; Sengstacken, Aaron; Simmonds, John J.; Spanovich, Nicole; Juarez, Manuel de la Torre; Webster, Christopher R.; Yen, Albert; Archer, Paul Douglas; Jones, John H.; Ming, Douglas; Morris, Richard V.; Niles, Paul; Rampe, Elizabeth; Nolan, Thomas; Fisk, Martin; Radziemski, Leon; Barraclough, Bruce; Bender, Steve; Berman, Daniel; Dobrea, Eldar Noe; Tokar, Robert; Vaniman, David; Williams, Rebecca M. E.; Yingst, Aileen; Lewis, Kevin; Leshin, Laurie; Cleghorn, Timothy; Huntress, Wesley; Manhès, Gérard; Hudgins, Judy; Olson, Timothy; Stewart, Noel; Sarrazin, Philippe; Grant, John; Vicenzi, Edward; Wilson, Sharon A.; Hamilton, Victoria; Peterson, Joseph; Fedosov, Fedor; Golovin, Dmitry; Karpushkina, Natalya; Kozyrev, Alexander; Litvak, Maxim; Malakhov, Alexey; Mitrofanov, Igor; Mokrousov, Maxim; Nikiforov, Sergey; Prokhorov, Vasily; Sanin, Anton; Tretyakov, Vladislav; Varenikov, Alexey; Vostrukhin, Andrey; Kuzmin, Ruslan; Clark, Benton; Wolff, Michael; McLennan, Scott; Botta, Oliver; Drake, Darrell; Bean, Keri; Lemmon, Mark; Schwenzer, Susanne P.; Anderson, Ryan B.; Herkenhoff, Kenneth; Lee, Ella Mae; Sucharski, Robert; Hernández, Miguel Ángel de Pablo; Ávalos, Juan José Blanco; Ramos, Miguel; Malespin, Charles; Plante, Ianik; Muller, Jan-Peter; Navarro-González, Rafael; Ewing, Ryan; Boynton, William; Downs, Robert; Fitzgibbon, Mike; Harshman, Karl; Morrison, Shaunna; Dietrich, William; Kortmann, Onno; Palucis, Marisa; Sumner, Dawn Y.; Williams, Amy; Lugmair, Günter; Wilson, Michael A.; Rubin, David; Jakosky, Bruce; Balic-Zunic, Tonci; Frydenvang, Jens; Jensen, Jaqueline Kløvgaard; Kinch, Kjartan; Koefoed, Asmus; Madsen, Morten Bo; Stipp, Susan Louise Svane; Boyd, Nick; Campbell, John L.; Gellert, Ralf; Perrett, Glynis; Pradler, Irina; VanBommel, Scott; Jacob, Samantha; Owen, Tobias; Rowland, Scott; Atlaskin, Evgeny; Savijärvi, Hannu; García, César Martín; Mueller-Mellin, Reinhold; Bridges, John C.; McConnochie, Timothy; Benna, Mehdi; Franz, Heather; Bower, Hannah; Brunner, Anna; Blau, Hannah; Boucher, Thomas; Carmosino, Marco; Atreya, Sushil; Elliott, Harvey; Halleaux, Douglas; Rennó, Nilton; Wong, Michael; Pepin, Robert; Elliott, Beverley; Spray, John; Thompson, Lucy; Gordon, Suzanne; Newsom, Horton; Ollila, Ann; Williams, Joshua; Vasconcelos, Paulo; Bentz, Jennifer; Nealson, Kenneth; Popa, Radu; Kah, Linda C.; Moersch, Jeffrey; Tate, Christopher; Day, Mackenzie; Kocurek, Gary; Hallet, Bernard; Sletten, Ronald; Francis, Raymond; McCullough, Emily; Cloutis, Ed; ten Kate, Inge Loes; Kuzmin, Ruslan; Arvidson, Raymond; Fraeman, Abigail; Scholes, Daniel; Slavney, Susan; Stein, Thomas; Ward, Jennifer; Berger, Jeffrey; Moores, John E.

    2014-01-01

    The Radiation Assessment Detector (RAD) on the Mars Science Laboratory's Curiosity rover began making detailed measurements of the cosmic ray and energetic particle radiation environment on the surface of Mars on 7 August 2012. We report and discuss measurements of the absorbed dose and dose equivalent from galactic cosmic rays and solar energetic particles on the martian surface for ~300 days of observations during the current solar maximum. These measurements provide insight into the radiation hazards associated with a human mission to the surface of Mars and provide an anchor point with which to model the subsurface radiation environment, with implications for microbial survival times of any possible extant or past life, as well as for the preservation of potential organic biosignatures of the ancient martian environment.

  10. X radiation qualities characterization following the standard IEC 61267 recommendations at the calibration laboratory of IPEN

    International Nuclear Information System (INIS)

    Franciscatto, Priscila Cerutti

    2009-01-01

    This work presents a methodology for the X radiation qualities characterization following the new recommendations of the standard 61267 of the International Electrotechnical Commission (IEC) to establish a new procedure for calibration of dosimetric systems used in the field of diagnostic radiology. The reference qualities radiation of IEC 61267: RQR 2 to RQR 10, RQA 2 to RQA 10, RQB 2 to RQB 10 and RQN 2 to RQN 10 were implanted at the calibration laboratory of IPEN (LCI). Their characteristics were analyzed through measurements of beam parameters such as: Practical peak voltage (PPV), specific additional filtrations for each qualities (high purity aluminum of about 99.9%), 1st and 2nd Half Value Layers, homogeneity coefficient. The inherent filtration of the X ray tube was also determined. With the establishment of these radiation qualities, the LCI will be ready to calibrate the measuring instruments of radiation in the new qualities, allowing an improvement in radiological services offered by IPEN. (author)

  11. Experiences and Management of Pregnant Radiation Workers at the Pacific Northwest National Laboratory

    International Nuclear Information System (INIS)

    Bliss, Mary; Bowyer, Sonya M.; Bryant, Janet L.; Lipton, Mary S.; Wahl, Karen L.

    2001-01-01

    Radiation workers at the Pacific Northwest National Laboratory are divided into two classes based on whether or not they can encounter radioactive contamination in the normal course of their work. Level I workers primarily handle sealed radioactive materials such as those used to calibrate detectors. Level II workers perform benchtop chemistry. The U.S. Department of Energy has strict guidelines on the management of pregnant radiation workers. Staff members may voluntarily notify their line managers of a pregnancy and be subjected to stringent radiation exposure limits for the developing fetus. The staff member and manager develop a plan to limit and monitor radiation dose for the remainder of the pregnancy. Several examples of dose management plans and case examples of the impact of pregnancy on staff member's technical work and projects will be presented

  12. Mars' surface radiation environment measured with the Mars Science Laboratory's Curiosity rover.

    Science.gov (United States)

    Hassler, Donald M; Zeitlin, Cary; Wimmer-Schweingruber, Robert F; Ehresmann, Bent; Rafkin, Scot; Eigenbrode, Jennifer L; Brinza, David E; Weigle, Gerald; Böttcher, Stephan; Böhm, Eckart; Burmeister, Soenke; Guo, Jingnan; Köhler, Jan; Martin, Cesar; Reitz, Guenther; Cucinotta, Francis A; Kim, Myung-Hee; Grinspoon, David; Bullock, Mark A; Posner, Arik; Gómez-Elvira, Javier; Vasavada, Ashwin; Grotzinger, John P

    2014-01-24

    The Radiation Assessment Detector (RAD) on the Mars Science Laboratory's Curiosity rover began making detailed measurements of the cosmic ray and energetic particle radiation environment on the surface of Mars on 7 August 2012. We report and discuss measurements of the absorbed dose and dose equivalent from galactic cosmic rays and solar energetic particles on the martian surface for ~300 days of observations during the current solar maximum. These measurements provide insight into the radiation hazards associated with a human mission to the surface of Mars and provide an anchor point with which to model the subsurface radiation environment, with implications for microbial survival times of any possible extant or past life, as well as for the preservation of potential organic biosignatures of the ancient martian environment.

  13. A locally designed mobile laboratory for radiation analysis and monitoring in qatar. Vol. 4

    International Nuclear Information System (INIS)

    Abou-Leila, H.; El-Samman, H.; Mahmoud, H.

    1996-01-01

    A description of a mobile laboratory for radiation analysis and monitoring, completely designed in qatar and equipped at qatar university, is given. It consists of a van equipped with three scintillation detectors mounted on the front bumper. The detectors can monitor gamma radiations along the path of the laboratory over an angle range 120 degree. One Eberline radiation monitoring station is mounted on the roof. The laboratory is also equipped with several, and neutron survey meters in addition to some sampling equipment. All equipment used are powered with solar panels. The characteristics and performance of solar power/stabilized A C conversion is given. Data acquisition from the three scintillation detectors is performed by adding the outputs of the three detectors and storing the total as a function of time in a computer based multi-channel analyzer (MCA) operated in the MSC mode. The acquisition can be switched easily to the PHA mode to analyze gamma spectra from any possible contamination source. The laboratory was used in several environmental and possible contamination missions. Some results obtained during some of these missions are given. 4 figs

  14. A locally designed mobile laboratory for radiation analysis and monitoring in qatar. Vol. 4

    Energy Technology Data Exchange (ETDEWEB)

    Abou-Leila, H; El-Samman, H; Mahmoud, H [Physics Department, University of qatar, Doha (Qatar)

    1996-03-01

    A description of a mobile laboratory for radiation analysis and monitoring, completely designed in qatar and equipped at qatar university, is given. It consists of a van equipped with three scintillation detectors mounted on the front bumper. The detectors can monitor gamma radiations along the path of the laboratory over an angle range 120 degree. One Eberline radiation monitoring station is mounted on the roof. The laboratory is also equipped with several, and neutron survey meters in addition to some sampling equipment. All equipment used are powered with solar panels. The characteristics and performance of solar power/stabilized A C conversion is given. Data acquisition from the three scintillation detectors is performed by adding the outputs of the three detectors and storing the total as a function of time in a computer based multi-channel analyzer (MCA) operated in the MSC mode. The acquisition can be switched easily to the PHA mode to analyze gamma spectra from any possible contamination source. The laboratory was used in several environmental and possible contamination missions. Some results obtained during some of these missions are given. 4 figs.

  15. Active Radiation Level Measurement on New Laboratory Instrument for Evaluating the Antibacterial Activity of Radioisotope

    International Nuclear Information System (INIS)

    Joh, Eunha; Park, Jang Guen

    2014-01-01

    A disc method has been widely used to measure the antibacterial effect of chemical agents. However, it is difficult to measure the antibacterial effect of radioisotopes using a disc method. A disc method is a method for diffusing a drug by placing the drug containing disc on the medium. In this method, radioisotopes are diffused on the medium and it is difficult to measure the exact effect by radiation. Thus, new laboratory equipment needs to evaluate the antibacterial activity by the radioisotopes. In this study, we measured the radiation level of radioisotopes on a new laboratory instrument using a MCNP. A disc method has been widely used to measure the antibacterial effect of chemical agents. This method uses a drug diffusion system for the measurement of anti-bacterial antibiotics. To measure the antimicrobial activity of a radioisotope, a new type of laboratory instrument is necessary to prevent the drug from spreading. The radioisotopes are used to diagnose and treat cancer. However, studies for anti-biotical use have not progressed. The radiation of radioisotopes has the effect of killing bacteria. Before this study proceeds further, it is necessary to be able to measure the antimicrobial activity of the radioisotope easily in the laboratory. However, in this study, it was possible to measure the antimicrobial activity of the radioisotope in the laboratory using a new laboratory instrument. We intend to start evaluation studies of the antibacterial activity of specific radioisotopes. In addition, it will be possible to develop research to overcome diseases caused by bacteria in the future

  16. Active Radiation Level Measurement on New Laboratory Instrument for Evaluating the Antibacterial Activity of Radioisotope

    Energy Technology Data Exchange (ETDEWEB)

    Joh, Eunha; Park, Jang Guen [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2014-05-15

    A disc method has been widely used to measure the antibacterial effect of chemical agents. However, it is difficult to measure the antibacterial effect of radioisotopes using a disc method. A disc method is a method for diffusing a drug by placing the drug containing disc on the medium. In this method, radioisotopes are diffused on the medium and it is difficult to measure the exact effect by radiation. Thus, new laboratory equipment needs to evaluate the antibacterial activity by the radioisotopes. In this study, we measured the radiation level of radioisotopes on a new laboratory instrument using a MCNP. A disc method has been widely used to measure the antibacterial effect of chemical agents. This method uses a drug diffusion system for the measurement of anti-bacterial antibiotics. To measure the antimicrobial activity of a radioisotope, a new type of laboratory instrument is necessary to prevent the drug from spreading. The radioisotopes are used to diagnose and treat cancer. However, studies for anti-biotical use have not progressed. The radiation of radioisotopes has the effect of killing bacteria. Before this study proceeds further, it is necessary to be able to measure the antimicrobial activity of the radioisotope easily in the laboratory. However, in this study, it was possible to measure the antimicrobial activity of the radioisotope in the laboratory using a new laboratory instrument. We intend to start evaluation studies of the antibacterial activity of specific radioisotopes. In addition, it will be possible to develop research to overcome diseases caused by bacteria in the future.

  17. Characterization of the radiation field of a 137Cs source in a calibration laboratory

    International Nuclear Information System (INIS)

    Barbosa, E.F.; Freitas, C.; Freire, D.; Almeida, C.E.

    2001-01-01

    Due to the broad range of radiation levels found in practice, the calibration of radiation detector requires that the laboratory have a large range of values of air kerma rates for a reference distance to the source, in order to allow the calibration of all scales. The dosimetry performed for open beam and with the different attenuators has shown deviations smaller than 5% in relation to the data supplied by the manufacturer that is acceptable. These results are in accordance with the recommendations of the ISO/DIS 4037-2

  18. The central gamma spectrometry laboratory of the GSF Institute of Radiation Protection

    International Nuclear Information System (INIS)

    Ruckerbauer, F.; Dietl, F.; Winkler, R.

    1997-01-01

    Since the middle of 1995 the WG Radioecology is operating the central gamma spectrometry laboratory of the GSF-Institute of Radiation Protection. The main scope of the laboratory is the gamma spectrometric analysis of samples within the research program of the institute and within joint programs with other institutes of the GSF research center. In the present report set-up and technical data of the measuring equipment, the central operating and data evaluation system and measures for quality assurance are described. At that time 18 semiconductor detectors are available for gamma spectrometric sample analysis which is standardized with respect to operation, evaluation algorithms, nuclide data, data safety and documentation. (orig.) [de

  19. Collimation system for a laboratory of primary and secondary ionizing radiation calibration

    International Nuclear Information System (INIS)

    Oliveira, S.R.; David, M.G.

    2003-01-01

    This work is part of a cooperation plan between the LNMRI/IRD and the LCR/UERJ, for the a primary calibration at the IRD and a secondary laboratory at the LCR, both calibrated for mammographic beams which will be part a Calibration National Network. For the mounting of the primary laboratory, the first step was to install two additional collimators in order to guarantee that the beam area over the ionization chamber to satisfy the calibration international standards. So, the collimators were constructed obeying the geometric rules, the first being of conic format and the second of the cylindrical format, therefore avoiding the effects of the scattering radiation on the edges. By using this collimation system it was possible to verify the uniformity of the radiation field incident the ionization chamber to be over 98% of the total area, guaranteeing better precision of the measurement

  20. Report on a Workshop on mobile laboratories for monitoring environmental radiation

    International Nuclear Information System (INIS)

    Andrasi, A,; Nemeth, I.; Zombori, P.; Urban, J.

    1992-01-01

    The international Workshop organized by the Health Physics Department of the Central Research Institute for Physics and by the Radiation Protection Department of the Paks Nuclear Power Plant was presented in this paper. The aims of the Workshop were the introduction of the mobile laboratories and the demonstration of the applied methods for monitoring environmental radiation in accidental situation. The intercomparison measurements showed that the results given by different participating laboratories (9 institutions from the middle and east European region) agreed well within an acceptable error margin. The demonstration, measurements and discussions were very useful for the participants and this could be a good basis for further developments and cooperations among the participating institutions. (author) 7 figs.; 2 tabs

  1. Laboratory astrophysics with high energy and high power lasers: from radiative shocks to young star jets

    International Nuclear Information System (INIS)

    Diziere, A.

    2012-01-01

    Laboratory astrophysics are a rapidly developing domain of the High Energy Density Physics. It aims to recreate at smaller scales physical processes that astronomical telescopes have difficulties observing. We shall approach, in this thesis, three major subjects: 1) Jets ejected from young stars, characterized by an important collimation degree and ending with a bow shock; 2) Radiative shocks in which radiation emitted by the shock front itself plays a dominant role in its structure and 3) Accretion shocks in magnetic cataclysmic variables whose important cooling factor allows them to reach stationarity. From the conception to experimental realization, we shall attempt to reproduce in laboratory each of these processes by respecting the scaling laws linking both situations (experimental and astrophysical) established beforehand. The implementation of a large array of visible and X-ray diagnostics will finally allow to completely characterize them and calculate the dimensionless numbers that validate the astrophysical relevance. (author) [fr

  2. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute (no.19)

    International Nuclear Information System (INIS)

    1987-03-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1985 through March 31, 1986. The latest report, for 1984, is JAERI-M 86-051. Detailed descriptions of the activities are presented in the following subjects: studies on surface phenomena under electron and ion irradiations; polymerization under the irradiation of electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  3. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute, (no. 20)

    International Nuclear Information System (INIS)

    1989-01-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1986 through March 31, 1987. The latest report, for 1985, is JAERI-M 87-046. Detailed descriptions of the activities are presented in the following subjects: studies on surface phenomena under electron and ion irradiations; polymerization under the irradiation of electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  4. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute, 14

    International Nuclear Information System (INIS)

    1981-12-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1980 through March 31, 1981. The latest report, for 1980, is JAERI-M 9214. Detailed descriptions of the activities are presented in the following subjects: studies on reactions of carbon monoxide, hydrogen and methane; polymerization under the irradiation of high dose rate electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  5. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute

    International Nuclear Information System (INIS)

    1982-12-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1981 through March 31, 1982. The latest report, for 1981, is JAERI-M 9856. Detailed descriptions of the activities are presented in the following subjects: studies on reactions of carbon monoxide, hydrogen and methane; polymerization under the irradiation of high dose rate electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  6. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute, No. 12

    International Nuclear Information System (INIS)

    1979-11-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1978 through March 31, 1979. The latest report, for 1978, is JAERI-M 7949. Detailed descriptions of the activities are presented in the following subjects: studies on reactions of carbon monoxide, hydrogen and methane; polymerization under the irradiation of high dose rate electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  7. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, (17)

    International Nuclear Information System (INIS)

    1985-01-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1983 through March 31, 1984. The latest report, for 1983, is JAERI-M 83-199. Detailed descriptions of the activities are presented in the following subjects: studies on surface phenomena under electron and ion irradiations; polymerization under the irradiation of electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  8. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, (13)

    International Nuclear Information System (INIS)

    1980-11-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1979 through March 31, 1980. The latest report, for 1979, is JAERI-M 8569. Detailed descriptions of the activities are presented in the following subjects: studies on reactions of carbon monoxide, hydrogen and methane; polymerization under the irradiation of high dose rate electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  9. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute, (9)

    International Nuclear Information System (INIS)

    1976-09-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1975 through March 31, 1976. The latest report, for 1975, is JAERI-M 6260. Detailed descriptions of the activities are presented in the following subjects: studies on reactions of carbon monoxide and hydrogen; polymerization under the irradiation of high dose rate electron beams; modification of polymers, degradation, cross-linking, and drafting. (auth.)

  10. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute (no. 18)

    International Nuclear Information System (INIS)

    1986-03-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1984 through March 31, 1985. The latest report, for 1984, is JAERI-M 84-239. Detailed descriptions of the activities are presented in the following subjects: studies on surface phenomena under electron and ion irradiations; polymerization under the irradiation of electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  11. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, No. 10

    International Nuclear Information System (INIS)

    1977-10-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1976 through March 31, 1977. The latest report, for 1976, is JAERI-M 6702. Detailed descriptions of the activities are presented in the following subjects: studies on reactions of carbon monoxide and hydrogen; polymerization under the irradiation of high dose rate electron beams; modification of polymers, degradation, cross-linking, and grafting. (auth.)

  12. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute (no. 16)

    International Nuclear Information System (INIS)

    1983-11-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1982 through March 31, 1983. The latest report, for 1982, is JAERI-M 82-192. Detailed descriptions of the activities are presented in the following subjects: studies on reactions of carbon monoxide, water and methane; polymerization under the irradiation of high dose rate electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  13. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute, (no. 11)

    International Nuclear Information System (INIS)

    1978-10-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1977 through March 31, 1978. The latest report, for 1977, is JAERI-M 7355. Detailed descriptions of the activities are presented in the following subjects: studies on reactions of carbon monoxide and hydrogen; polymerization under the irradiation of high dose rate electron beams; modification of polymers, degradation, cross-linking, and grafting. (author)

  14. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute (No. 8)

    International Nuclear Information System (INIS)

    1975-10-01

    This report describes research activities in Osaka Laboratory for Radiation Chemistry, JAERI during the one year period from April 1, 1974 through March 31, 1975. The major research field covers the following subjects: studies related to reactions of carbon monoxide and hydrogen; polymerization studies under the irradiation of high dose rate electron beams; modification of polymers; fundamental studies on polymerization, degradation, crosslinking, and grafting. (auth.)

  15. Calibrations and evaluation of the quality assurance during 1999 at the National Laboratory for ionising radiation

    International Nuclear Information System (INIS)

    Grindborg, Jan-Erik; Israelsson, Karl-Erik; Kylloenen, Jan-Erik; Samuelson, Goeran

    2000-06-01

    The Swedish Radiation Protection Institute is the National Laboratory for the dosimetric quantities kerma, absorbed dose and dose equivalent. The activity is based on established calibration procedures and a quality assurance program for the used standards. This report gives a brief summary of the calibrations performed during 1999 and a more detailed description and analysis of the quality assurance during this year. The report makes it easier to draw conclusions about the long-term stability and possible malfunctions

  16. Laboratory training manual on the use of isotopes and radiation in soil-plant relations research

    International Nuclear Information System (INIS)

    1964-01-01

    The International Atomic Energy Agency (IAEA) and the Food and Agriculture Organization of the United Nations (FAO) in co-operation with local authorities in various countries have jointly sponsored international laboratory training courses on the use of isotopes and radiation in specialized fields of agriculture. Outstanding scientists from various countries have given lectures and devised and conducted the laboratory exercises; research workers from all over the world have attended these courses. In addition, under the United Nations Expanded Programme of Technical Assistance the IAEA in co-operation with host governments has conducted similar regional courses. This laboratory manual is a natural outgrowth of these activities. The contents represents the efforts not only of the IAEA and FAO Secretariats but also of the various instructors who have participated in the courses, a Special Consultant, Victor Middelboe, and a panel of scientists who met in Vienna from 3 to 7 September 1962 and revised the initial version assembled by Hans Broeshart and Chai Moo Cho of the IAEA Secretariat. The present manual consists of two parts: a basic part which contains general information and laboratory exercises on the properties of radiation and the principles of use of radioactive tracers, and a second part which contains a series of detailed laboratory exercises in the field of soil-plant relationships. It is intended to publish at least four additional parts on the subjects of the use of isotopes and radiation in animal science, agricultural biochemistry, entomology and plant pathology. This manual, dealing with an important aspect of the peaceful application and use of atomic energy, should prove helpful not only to those working with the IAEA and FAO training programmes but to other research scientists dealing with the development and use of new information in agricultural science all over the world

  17. Safety Study of the X-Ray Reference Laboratory for Radiation Protection Levels (IR-14D)

    International Nuclear Information System (INIS)

    Garcia, G.

    1999-01-01

    This report is a study about the safety of the X-ray reference laboratory that has been recently constructed in the building 2 of the CIEMAT. After a brief description of the apparatus, we present the method used to calculate the exposure and absorbed dose rates in the most characteristic points of the laboratory. This method takes into account the spectral distribution of the radiation beams as a function of the accelerating voltage. The built-up factors of the absorbent materials have been considered to calculate the transmission of the radiation beams through the filters and shielding. Scattered radiations has been introduced in the calculations by means of a semiempirical method. This model supposes that multiple scattering processes give an isotropic contribution to the reflected beams and the single scattered can be described in terms of the differential cross section of Klein-Nishina. The results of this study have been applied to determine the maximum dose equivalent that the personnel of the laboratory could receive in normal operation conditions. (Author) 5 refs

  18. Potential for improved radiation thermometry measurement uncertainty through implementing a primary scale in an industrial laboratory

    Science.gov (United States)

    Willmott, Jon R.; Lowe, David; Broughton, Mick; White, Ben S.; Machin, Graham

    2016-09-01

    A primary temperature scale requires realising a unit in terms of its definition. For high temperature radiation thermometry in terms of the International Temperature Scale of 1990 this means extrapolating from the signal measured at the freezing temperature of gold, silver or copper using Planck’s radiation law. The difficulty in doing this means that primary scales above 1000 °C require specialist equipment and careful characterisation in order to achieve the extrapolation with sufficient accuracy. As such, maintenance of the scale at high temperatures is usually only practicable for National Metrology Institutes, and calibration laboratories have to rely on a scale calibrated against transfer standards. At lower temperatures it is practicable for an industrial calibration laboratory to have its own primary temperature scale, which reduces the number of steps between the primary scale and end user. Proposed changes to the SI that will introduce internationally accepted high temperature reference standards might make it practicable to have a primary high temperature scale in a calibration laboratory. In this study such a scale was established by calibrating radiation thermometers directly to high temperature reference standards. The possible reduction in uncertainty to an end user as a result of the reduced calibration chain was evaluated.

  19. Radiation Testing at Sandia National Laboratories: Sandia – JPL Collaboration for Europa Lander

    Energy Technology Data Exchange (ETDEWEB)

    Hattar, Khalid Mikhiel [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Ion Beam Lab.; Olszewska-Wasiolek, Maryla Aleksandra [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Gamma Irradiation Facility

    2017-01-01

    Sandia National Laboratories (SNL) is assisting Jet Propulsion Laboratory in undertaking feasibility studies and performance assessments for the Planetary Protection aspect of the Europa Lander mission. The specific areas of interest for this project are described by task number. This white paper presents the evaluation results for Task 2, Radiation Testing, which was stated as follows: Survey SNL facilities and capabilities for simulating the Europan radiation environment and assess suitability for: A. Testing batteries, electronics, and other component and subsystems B. Exposing biological organisms to assess their survivability metrics. The radiation environment the Europa Lander will encounter on route and in orbit upon arrival at its destination consists primarily of charged particles, energetic protons and electrons with the energies up to 1 GeV. The charged particle environments can be simulated using the accelerators at the Ion Beam Laboratory. The Gamma Irradiation Facility and its annex, the Low Dose Rate Irradiation Facility, offer irradiations using Co-60 gamma sources (1.17 and 1.33 MeV), as well as Cs-137 gamma (0.661 MeV) AmBe neutron (0-10 MeV) sources.

  20. Dosimeter calibration facilities and methods at the Radiation Measurement Laboratory of the Centre d'etudes nucleaires, Grenoble

    International Nuclear Information System (INIS)

    Choudens, H. de; Herbaut, Y.; Haddad, A.; Giroux, J.; Rouillon, J.; CEA Centre d'Etudes Nucleaires de Grenoble, 38

    1975-01-01

    At the Centre d'etudes nucleaires, Grenoble, the Radiation Measurement Laboratory, which forms part of the Environmental Protection and Research Department, serves the entire Centre for purposes of dosimetry and the calibration of dose meters. The needs of radiation protection are such that one must have facilities for checking periodically the calibration of radiation-monitoring instruments and developing special dosimetry techniques. It was thought a good idea to arrange for the dosimetry and radiation protection team to assist other groups working at the Centre - in particular, the staff of the biology and radiobiology laboratories - and also bodies outside the framework of the French Commissariat a l'energie atomique. Thus, technical collaboration has been established with, for example, Grenoble's Centre hospitalier universitaire (university clinic), which makes use of the facilities and skills available at the Radiation Measurement Laboratory for solving special dosimetry problems. With the Laboratory's facilities it is possible to calibrate dose meters for gamma, beta and neutron measurements

  1. Laboratory simulation of interplanetary ultraviolet radiation (broad spectrum) and its effects on Deinococcus radiodurans

    Science.gov (United States)

    Paulino-Lima, Ivan Gláucio; Pilling, Sérgio; Janot-Pacheco, Eduardo; de Brito, Arnaldo Naves; Barbosa, João Alexandre Ribeiro Gonçalves; Leitão, Alvaro Costa; Lage, Claudia de Alencar Santos

    2010-08-01

    The radiation-resistant bacterium Deinococcus radiodurans was exposed to a simulated interplanetary UV radiation at the Brazilian Synchrotron Light Laboratory (LNLS). Bacterial samples were irradiated on different substrates to investigate the influence of surface relief on cell survival. The effects of cell multi-layers were also investigated. The ratio of viable microorganisms remained virtually the same (average 2%) for integrated doses from 1.2 to 12 kJ m -2, corresponding to 16 h of irradiation at most. The asymptotic profiles of the curves, clearly connected to a shielding effect provided by multi-layering cells on a cavitary substrate (carbon tape), means that the inactivation rate may not change significantly along extended periods of exposure to radiation. Such high survival rates reinforce the possibility of an interplanetary transfer of viable microbes.

  2. Laboratory training manual on the use of isotopes and radiation in entomology. 2. ed.

    International Nuclear Information System (INIS)

    1977-01-01

    The revised manual, which incorporates changes particularly regarding applied aspects, consists of 7 parts. Part 1 is divided into separate chapters on the properties of radionuclides and radiations; radiation detection and assay of radioactivity; radiation protection; tracer methodology; 15 N determination; and neutron moderation and γ-ray attentuation techniques. Part 2 is concerned with radiobiology. References and a bibliography are supplied with each part. Part 3 contains 17 mental exercises, part 4 laboratory exercises on a GM counter; a scintillation counter; contamination and decontamination; and exercises on basic utilization principles. Part 5 considers radioisotope uptake and excretion paths through the insect organism; principles of internal and external tagging; with emphasis on insect physiology and ecology; various experiments on insects, and insect sterilization using 60 Co and chemosterilants. Eight Appendices and a Glossary of some basic terms and concepts constitute parts 6 and 7, respectively

  3. Establishment of exposure dose assessment laboratory in National Radiation Emergency Medical Center (NREMC)

    Energy Technology Data Exchange (ETDEWEB)

    Yoo, Jae Ryong; Ha, Wi Ho; Yoon, Seok Won; Han, Eun Ae; Lee, Seung Sook [Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of)

    2011-10-15

    As unclear industry grown, 432 of the nuclear power plants are operating and 52 of NPPs are under construction currently. Increasing use of radiation or radioisotopes in the field of industry, medical purpose and research such as non-destructive examination, computed tomography and x-ray, etc. constantly. With use of nuclear or radiation has incidence possibility for example the Fukushima NPP incident, the Goiania accident and the Chernobyl Nuclear accident. Also the risk of terror by radioactive material such as Radiological Dispersal Device(RDD) etc. In Korea, since the 'Law on protection of nuclear facilities and countermeasure for radioactive preparedness was enacted in 2003, the Korean institute of Radiological and Medical Sciences(KIRAMS) was established for the radiation emergency medical response in radiological disaster due to nuclear accident, radioactive terror and so on. Especially National Radiation Emergency Medical Center(NREMC) has the duty that is protect citizens from nuclear, radiological accidents or radiological terrors through the emergency medical preparedness. The NREMC was established by the 39-article law on physical protection of nuclear material and facilities and measures for radiological emergencies. Dose assessment or contamination survey should be performed which provide the radiological information for medical response. For this reason, the NREMC establish and re-organized dose assessment system based on the existing dose assessment system of the NREMC recently. The exposure dose could be measured by physical and biological method. With these two methods, we can have conservative dose assessment result. Therefore the NREMC established the exposure dose assessment laboratory which was re-organized laboratory space and introduced specialized equipment for dose assessment. This paper will report the establishment and operation of exposure dose assessment laboratory for radiological emergency response and discuss how to enhance

  4. The effect of sucralfate on the reduction of radiation esophagitis: clinical and laboratory data

    International Nuclear Information System (INIS)

    Chun, Mison; Kim, Juree; Hahm, Kibaik; Kim, Jinhong

    1996-01-01

    Purpose/Objective: Sucralfate is a common ulcer healing drug. This study was conducted between June 1995 and February 1996, to verify the sucralfate effect on the reduction of esophagitis, radiation induced mucosal damage. Materials and Methods: Initially, a total of 39 patients (31 lung cancer, 8 esophageal cancer) received either sucralfate or a placebo before each meal (TID) starting the 1st day of the radiation treatment and continuing during the treatment without interruption. Patients were evaluated weekly by the same personnel using a pain scale. Subsequently, sucralfate was given 4 times daily (QID), with each meal and right before treatment, to 14 patients. Esophageal biopsies were taken from 14 patients (9 from the sucralfate group and 5 from the placebo group) on the third week of radiation treatment, when the patients usually received 2000 to 2500 cGy to the thoracic esophagus. We evaluated the change of reactive oxygen metabolites and reactive nitrogen metabolites such as NOS(constitutive and inducible form of nitric oxide synthetase) generated by irradiation. Myeloperoxidase(MPO) activities were measured spectroscopically. Thiobarbituric acid reactive substance (TBA-RS) and chemiluminescence (CL) as an index of lipid peroxidation were also measured. Results: There was a considerable reduction of severe esophagitis (≥ 4 pain scale) in patients with regular sucralfate medication compared to patients with the placebo ((6(20))(30%) vs(14(19)) (74%)). Sucralfate QID group patients showed more improvement than the TID group, with only 2 out of 14 (14%) suffering severe esophagitis. The laboratory results are shown below : Conclusion: This data confirmed that sucralfate significantly reduced severe esophagitis symptoms during the radiation therapy course, and made it easier for patients to tolerate the thoracic radiation treatment. Moreover, the laboratory data showed a significant reduction in the level of all reactive oxygen metabolites generated by the

  5. Computerization aspects of the Health Physics' Radiation Control Program at Argonne National Laboratory

    International Nuclear Information System (INIS)

    Dolecek, Elwyn H.

    1978-01-01

    Greater public awareness of the potential hazards of ionizing radiation and the more stringent governmental compliance programs have made accountability of radioactive materials an item of increasingly major concern for all radionuclide users. For low-volume (radioisotopically) organizations, manual record keeping techniques may suffice without requiring significant work-hour allocations. When considering high-volume users, the workload contingent with manual inventory is usually excessive from an employee time-allocation standpoint. Therefore, various automation systems are employed, usually with the aid of an in-house or time-purchase computer system. The computer programs developed for these systems often do not allow for future modification without major rewriting. Therefore, to facilitate in program concept, modification, and implementation the Health Physics Section at Argonne National Laboratory chose to design and code its computer program(s) and has instituted a Radiation Administrative Program (RAP) as a major component of the Section's laboratory-wide radiation control program. Coded in ANSI PL/I, RAP provides both flexibility in present concept and allowance for future growth. It requires less than 300K words of computer memory and can be easily incorporated at other organizations with minimal modifications. The modular design provides run cost benefits and versatility of report generation and modification. Through the use of this type of information processing and retrieval system, one can manipulate large amounts of radionuclide data, providing control and identification, while still maintaining commitment of computer costs and employee time at a reasonable level. (author)

  6. Personnel radiation dosimetry laboratory accreditation programme for thermoluminescent dosimeters : a proposal

    International Nuclear Information System (INIS)

    Bhatt, B.C.; Srivastava, J.K.; Iyer, P.S.; Venkatraman, G.

    1993-01-01

    Accreditation for thermoluminescent dosimeters is the process of evaluating a programme intending to use TL personnel dosimeters to measure, report and record dose equivalents received by radiation workers. In order to test the technical competence for conducting personnel dosimetry service as well as to decentralize personnel monitoring service, it has been proposed by Radiological Physics Division (RPhD) to accredit some of the laboratories, in the country. The objectives of this accreditation programme are: (i) to give recognition to competent dosimetry processors, and (ii) to provide periodic evaluation of dosimetry processors, including review of internal quality assurance programme to improve the quality of personnel dosimetry processing. The scientific support for the accreditation programme will be provided by the scientific staff from Radiological Physics Division (RPhD) and Radiation Protection Services Division (RPSD). This paper describes operational and technical requirements for the Personnel Radiation Dosimetry Laboratory Accreditation Programme for Thermoluminescent Dosimeters for Personnel Dosimetry Processors. Besides, many technical documents dealing with the TL Personnel Dosimeter System have been prepared. (author). 5 refs., 2 figs

  7. Monte Carlo simulation of muon radiation environment in China Jinping Underground Laboratory

    International Nuclear Information System (INIS)

    Su Jian; Zeng Zhi; Liu Yue; Yue Qian; Ma Hao; Cheng Jianping

    2012-01-01

    Muon radiation background of China Jinping Underground Laboratory (CJPL) was simulated by Monte Carlo method. According to the Gaisser formula and the MUSIC soft, the model of cosmic ray muons was established. Then the yield and the average energy of muon-induced photons and muon-induced neutrons were simulated by FLUKA. With the single-energy approximation, the contribution to the radiation background of shielding structure by secondary photons and neutrons was evaluated. The estimation results show that the average energy of residual muons is 369 GeV and the flux is 3.17 × 10 -6 m -2 · s -1 . The fluence rate of secondary photons is about 1.57 × 10 -4 m -2 · s -1 , and the fluence rate of secondary neutrons is about 8.37 × 10 -7 m -2 · s -1 . The muon radiation background of CJPL is lower than those of most other underground laboratories in the world. (authors)

  8. Quality assurance for radon exposure chambers at the National Air and Radiation Environmental Laboratory, Montgomery, Alabama

    Energy Technology Data Exchange (ETDEWEB)

    Semler, M.O.; Sensintaffar, E.L. [National Air and Radiation Environmental Laboratory, Montgomery, AL (United States)

    1993-12-31

    The Office of Radiation and Indoor Air, U.S. Environmental Protection Agency (EPA), operates six radon exposure chambers in its two laboratories, the National Air and Radiation Environmental Laboratory (NAREL) in Montgomery, Alabama, and the Las Vegas Facility, Las Vegas, Nevada. These radon exposure chambers are used to calibrate and test portable radon measuring instruments, test commercial suppliers of radon measurement services through the Radon Measurement Proficiency Program, and expose passive measurement devices to known radon concentrations as part of a quality assurance plan for federal and state studies measuring indoor radon concentrations. Both laboratories participate in national and international intercomparisons for the measurement of radon and are presently working with the National Institute of Standards and Technology (NIST) to receive a certificate of traceability for radon measurements. NAREL has developed an estimate of the total error in its calibration of each chamber`s continuous monitors as part of an internal quality assurance program. This paper discusses the continuous monitors and their calibration for the three chambers located in Montgomery, Alabama, as well as the results of the authors intercomparisons and total error analysis.

  9. Second meeting of the Scientific Societies for the feasibility study of implantation of a synchrotron radiation national laboratory

    International Nuclear Information System (INIS)

    1984-01-01

    Feasibility study for the implantation of a national laboratory of synchrotron radiation in Brazil is discussed by several Brazilian Scientific Societies. Problems related with cost, personnel training and machine uses are presented. (L.C.) [pt

  10. EVENT DRIVEN AUTOMATIC STATE MODIFICATION OF BNL'S BOOSTER FOR NASA SPACE RADIATION LABORATORY SOLAR PARTICLE SIMULATOR

    International Nuclear Information System (INIS)

    BROWN, D.; BINELLO, S.; HARVEY, M.; MORRIS, J.; RUSEK, A.; TSOUPAS, N.

    2005-01-01

    The NASA Space Radiation Laboratory (NSRL) was constructed in collaboration with NASA for the purpose of performing radiation effect studies for the NASA space program. The NSRL makes use of heavy ions in the range of 0.05 to 3 GeV/n slow extracted from BNL's AGS Booster. NASA is interested in reproducing the energy spectrum from a solar flare in the space environment for a single ion species. To do this we have built and tested a set of software tools which allow the state of the Booster and the NSRL beam line to be changed automatically. In this report we will describe the system and present results of beam tests

  11. Assessment of internal and external exposure to ionizing radiation in laboratories of nuclear medicine and radiotherapy

    International Nuclear Information System (INIS)

    Adamiak-Ziemba, J.; Doniec, J.; Kocznow, W.; Hawrynski, M.

    1985-01-01

    The investigations with determination of radioisotopes in urine led to detection of contamination with 99m Tc and radioactive iodine. The measurements and dosimetry of external radiation demonstrated that workers in laboratories of radioisotope diagnosis received a mean annual equivalent doses amounted less than 5% of the permissible dose for persons with occupational exposure. It was also established that external exposure was mainly responsible for this. The data about the levels of internal exposure in laboratories of nuclear medicine and radiotherapy demonstrated that introduction of a permanent central system of control of internal contamination of workers would be useless since the observation of the already accepted principles of radiological protection is sufficient for avoiding contamination. (author)

  12. Application of gamma radiation for the treatment of laboratory animal diets

    International Nuclear Information System (INIS)

    Ley, F.J.

    1979-01-01

    The use of gamma radiation for the treatment of laboratory animal diets has proved particularly successful. The effective inactivation of microorganisms, insects and parasites etc. is well demonstrated and the absence of adverse effects on the dietary components is inferred from many years of practical use. Adequate packaging of the pelleted diets is essential to avoid recontamination after irradiation; this aspect needs particular attention. The economics of the process are such that it would not be warranted to invest in a 60 Co plant specifically for the treatment of laboratory diets. However, a throughput in the order of 1000 to 1500 tonnes per annum, as estimated to meet UK current demand, can be catered for adequately and economically in a large-scale general service facility. (author)

  13. Mars science laboratory radiation assessment detector (MSL/RAD) modeling workshop proceedings

    Science.gov (United States)

    Hassler, Donald M.; Norbury, John W.; Reitz, Günther

    2017-08-01

    The Radiation Assessment Detector (RAD) (Hassler et al., 2012; Zeitlin et al., 2016) onboard the Mars Science Laboratory (MSL) Curiosity rover (Grotzinger et al., 2012) is a sophisticated charged and neutral particle radiation analyzer developed by an international team of scientists and engineers from Southwest Research Institute in Boulder, Colorado as the leading institution, the University of Kiel and the German Aerospace Center in Cologne, Germany. RAD is a compact, powerful instrument capable of distinguishing between ionizing particles and neutral particles and providing neutron, gamma, and charged particle spectra from protons to iron as well as absorbed dose measurements in tissue-equivalent material. During the 6 month cruise to Mars, inside the MSL spacecraft, RAD served as a proxy to validate models of the radiation levels expected inside a spacecraft that future astronauts might experience (Zeitlin et al., 2013). RAD was turned on one day after the landing on August 7, 2012, exactly 100 years to the day after the discovery of cosmic rays on Earth by Victor Hess. These measurements are the first of their kind on the surface of another planet (Hassler et al., 2014), and the radiation data collected by RAD on the surface of Mars will inform projections of crew health risks and the design of protective surface habitats and other countermeasures for future human missions in the coming decades.

  14. 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.)

  15. [Experience of the development special medical technical laboratory for studies of effects caused by potent electromagnetic radiation in biologic objects].

    Science.gov (United States)

    Gorodetsky, B N; Kalyada, T V; Petrov, S V

    2015-01-01

    This article covers topics of creating special medical technical laboratory for medial and biologic studies concerning influence of potent high-frequency elecromagnetic radiation on various biologic objects. The authors gave example of such laboratory, described its construction features, purpose and main characteristics of the included devices.

  16. Radiation-induced DNA damage and repair: Argonne National Laboratory symposium, Argonne, Illinois 60439, 15 April, 1988. Symposium report

    Energy Technology Data Exchange (ETDEWEB)

    Peak, M J; Peak, J G; Blazek, E R

    1988-10-01

    The Argonne National Laboratory Symposium brought together 109 scientists from five countries to discuss the molecular effects of radiation on DNA and the responses of cells to radiation exposure. Six speakers covered three general areas: (1) DNA damages caused by radiations; (2) repair of these damages in prokaryotes and eukaryotes; and (3) aminothiols as radioprotectors. In addition, a round table discussion chaired by J. Ward dealt with alkaline and neutral elution methodology.

  17. Oak Ridge National Laboratory Radiation Control Program - Partners in Site Restoration

    International Nuclear Information System (INIS)

    Jones, S. L.; Stafford, M. W.

    2002-01-01

    In 1998, the U.S. Department of Energy (DOE) awarded the Management and Integration (M and I) contract for all five of the Oak Ridge Operations (ORO) facilities to Bechtel Jacobs Company LLC (BJC). At Oak Ridge National Laboratory (ORNL), a world renowned national laboratory and research and development facility, the BJC mission involves executing the DOE Environmental Management (EM) program. In addition to BJC's M and I contract, UT-Battelle, LLC, a not-for-profit company, is the Management and Operating (M and O) contractor for DOE on the ORNL site. As part of ORNL's EM program, legacy inactive facilities (i.e., reactors, nuclear material research facilities, burial grounds, and underground storage tanks) are transferred to BJC and are designated as remediation, decontamination and decommissioning (D and D), or long-term surveillance and maintenance (S and M) facilities. Facilities operated by both UT-Battelle and BJC are interspersed throughout the site and are usually in close proximity. Both UT-Battelle and BJC have DOE-approved Radiation Protection Programs established in accordance with 10 CFR 835. The BJC Radiological Control (RADCON) Program adapts to the M and I framework and is comprised of a combination of subcontracted program responsibilities with BJC oversight. This paper focuses on the successes and challenges of executing the BJC RADCON Program for BJC's ORNL Project through a joint M and I contractor relationship, while maintaining a positive working relationship and partnership with UT-Battelle's Radiation Protection organization

  18. Efficacy and safety of far infrared radiation in lymphedema treatment: clinical evaluation and laboratory analysis.

    Science.gov (United States)

    Li, Ke; Zhang, Zheng; Liu, Ning Fei; Feng, Shao Qing; Tong, Yun; Zhang, Ju Fang; Constantinides, Joannis; Lazzeri, Davide; Grassetti, Luca; Nicoli, Fabio; Zhang, Yi Xin

    2017-04-01

    Swelling is the most common symptom of extremities lymphedema. Clinical evaluation and laboratory analysis were conducted after far infrared radiation (FIR) treatment on the main four components of lymphedema: fluid, fat, protein, and hyaluronan. Far infrared radiation is a kind of hyperthermia therapy with several and additional benefits as well as promoting microcirculation flow and improving collateral lymph circumfluence. Although FIR therapy has been applied for several years on thousands of lymphedema patients, there are still few studies that have reported the biological effects of FIR on lymphatic tissue. In this research, we investigate the effects of far infrared rays on the major components of lymphatic tissue. Then, we explore the effectiveness and safety of FIR as a promising treatment modality of lymphedema. A total of 32 patients affected by lymphedema in stage II and III were treated between January 2015 and January 2016 at our department. After therapy, a significant decrease of limb circumference measurements was noted and improving of quality of life was registered. Laboratory examination showed the treatment can also decrease the deposition of fluid, fat, hyaluronan, and protein, improving the swelling condition. We believe FIR treatment could be considered as both an alternative monotherapy and a useful adjunctive to the conservative or surgical lymphedema procedures. Furthermore, the real and significant biological effects of FIR represent possible future applications in wide range of the medical field.

  19. Influence of ambient meteorology on the accuracy of radiation measurements: insights from field and laboratory experiments

    Science.gov (United States)

    Oswald, Sandro M.; Pietsch, Helga; Baumgartner, Dietmar J.; Rieder, Harald E.

    2016-04-01

    A precise knowledge of the surface energy budget, which includes the solar and terrestrial radiation fluxes, is needed to accurately characterize the global energy balance which is largely determining Earth's climate. To this aim national and global monitoring networks for surface radiative fluxes have been established in recent decades. The most prominent among these networks is the so-called Baseline Surface Radiation Network (BSRN) operating under the auspices of the World Climate Research Programme (WCRP) (Ohmura et al., 1998). National monitoring networks such as the Austrian RADiation Monitoring Network (ARAD), which has been established in 2010 by a consortium of the Central Agency of Meteorology and Geodynamics (ZAMG), the University of Graz, the University of Innsbruck, and the University of Natural Resources and Applied Sciences, Vienna (BOKU), orient themselves on BSRN standards (McArthur, 2005). ARAD comprises to date five sites (Wien Hohe Warte, Graz/University, Innsbruck/University, Kanzelhöhe Observatory and Sonnblick (which is also a BSRN site)) and aims to provide long-term monitoring of radiation budget components at highest accuracy and to capture the spatial patterns of radiation climate in Austria (Olefs et al., 2015). Given the accuracy requirement for the local monitoring of radiative fluxes instrument offsets, triggered by meteorological factors and/or instrumentation, pose a major challenge in radiation monitoring. Within this study we investigate effects of ambient meteorology on the accuracy of radiation measurements performed with pyranometers contained in various heating/ventilation systems (HV-systems), all of which used in regular operation within the ARAD network. We focus particularly on instrument offsets observed following precipitation events. To quantify pyranometer responses to precipitation we performed a series of controlled laboratory experiments as well as targeted field campaigns in 2015 and 2016. Our results indicate

  20. A mobile radiological laboratory for rapid response to off-site radiation emergencies

    Energy Technology Data Exchange (ETDEWEB)

    Katoch, D. S.; Sharma, R. C.; Mehta, D. J.; Raj, V. Venkat [Bhabha Atomic Research Centre, Mumbai (India)

    2002-07-01

    A mobile radiological laboratory (MRL) has been designed and developed primarily for providing a rapid response to radiation emergencies arising as a consequence of nuclear and/or radiological accidents. It is equipped specifically to monitor the environment and provide quick assessment of radiological hazards to the population living within a radius of 30 km around a nuclear facility. In this paper, various design features of an Indian MRL together with the details of installed equipment are presented. The MRL has been designed for a continuous outdoor operation of about two weeks. It is built on a 10.70 m long air suspension Bus Chassis and has four sections : Driver's Cabin, Main Counting Laboratory, Whole Body Monitor and Rear section housing general utilities. The electric power is provided by two diesel generators during field operation and by 230 V AC mains supply at headquarters and wherever possible. The equipment installed in the MRL includes : Alpha, beta and gamma counting systems and low and high volume air samplers for the assessment of radioactive contents in the samples of air, water, soil and vegetation; environment dose rate meters and a variety of survey meters for evaluating any potential increase in radiation levels; personal dosimeters to control external radiation exposure; personal protective equipment for avoiding skin and clothing contamination; a chair type of whole body monitor for the assessment of internal radioactive contamination of the human body, in particular, thyroidal uptake of radioiodine; an automatic weather station for recording continuously the meteorological parameters and a satellite based global positioning system to continuously track and display the geographical location of the MRL. The calibrations of the installed equipment are presently in progress. Preliminary results obtained for the methods needed for rapid detection of gamma emitters in the environment and human body, namely, in situ gamma spectrometry and

  1. Audit of high energy therapy beams in hospital oncology departments by the National Radiation Laboratory

    International Nuclear Information System (INIS)

    Smyth, V.G.

    1994-02-01

    In 1993 the output of every high energy radiotherapy beam used clinically in New Zealand was measured by National Radiation Laboratory (NRL) staff using independent dosimetry equipment. The purpose of this was to audit the dosimetry that is used by hospital physicists for the basis of patient treatments, and to uncover any errors that may be clinically significant. This report analyses the uncertainties involved in comparing the NRL and hospital measurements, and presents the results of the 1993 audit. The overall uncertainty turns out to be about 1.5%. The results for linear accelerator photon beams are consistent with a purely random variation within this uncertainty. Electron beams show some small errors beyond the expected uncertainty. Gamma beams have the potential to be the most accurately measured, but in practice are less accurately measured than linear accelerator beams. None of the disagreements indicated an error of clinical significance. 8 refs., 3 figs., 2 tabs

  2. Upgrade of a radiation measurement laboratory course at the University of Florida

    International Nuclear Information System (INIS)

    Thomsen, L.M.; Bolch, W.E.; Wagner, T.H.

    1996-01-01

    The open-quotes Nuclear Radiation Detection and Instrumentation Laboratoryclose quotes course at the University of Florida provides health physics students with virtually their only hands-on exposure to the radiation measurement equipment used in professional practice. To better prepare students for employment, the course is currently under revision, with implementation of the revised course scheduled for fall semester 1996. The primary goal is to improve student understanding of the inherent strengths and limitations of various gas-filled, scintillation, and semiconductor detectors. A secondary goal is to improve student writing skills. To devise lab exercises that meet these goals, a six-step method for systematic laboratory course improvement was developed and used to guide the revision process. First, course objectives were delineated. Second, obstacles to achieving these course objectives were candidly assessed. Third, the course objectives were prioritized to ensure that the most important ones were met within the given time and equipment constraints. Fourth, performance-based learning objectives were written for each exercise. Fifth, exercises were developed that enable students to achieve the learning objectives specified. Sixth, when the revised course is implemented, its teaching effectiveness will be measured and steps will be taken to improve further. Course revision is nearly complete, and the new exercises promise to significantly improve both student technical knowledge and communication skill

  3. RESULTS OF THE FIRST RUN OF THE NASA SPACE RADIATION LABORATORY AT BNL

    International Nuclear Information System (INIS)

    BROWN, K.A.; AHRENS, L.; BRENNAN, J.M.

    2004-01-01

    The NASA Space Radiation Laboratory (NSRL) was constructed in collaboration with NASA for the purpose of performing radiation effect studies for the NASA space program. The results of commissioning of this new facility were reported in [l]. In this report we will describe the results of the first run. The NSRL is capable of making use of heavy ions in the range of 0.05 to 3 GeV/n slow extracted from BNL's AGS Booster. Many modes of operation were explored during the first run, demonstrating all the capabilities designed into the system. Heavy ion intensities from 100 particles per pulse up to 12 x 10 9 particles per pulse were delivered to a large variety of experiments, providing a dose range up to 70 Gy/min over a 5 x 5 cm 2 area. Results presented will include those related to the production of beams that are highly uniform in both the transverse and longitudinal planes of motion [2

  4. 1-2 GeV synchrotron radiation facility at Lawrence Berkeley Laboratory

    International Nuclear Information System (INIS)

    Berkner, K.H.

    1985-10-01

    The Advanced Light Source (ALS), a dedicated synchrotron radiation facility optimized to generate soft x-ray and vacuum ultraviole (XUV) light using magnetic insertion devices, was proposed by the Lawrence Berkeley Laboratory in 1982. It consists of a 1.3-GeV injection system, an electron storage ring optimized at 1.3 GeV (with the capability of 1.9-GeV operation), and a number of photon beamlines emanating from twelve 6-meter-long straight sections, as shown in Fig. 1. In addition, 24 bending-magnet ports will be avialable for development. The ALS was conceived as a research tool whose range and power would stimulate fundamentally new research in fields from biology to materials science (1-4). The conceptual design and associated cost estimate for the ALS have been completed and reviewed by the US Department of Energy (DOE), but preliminary design activities have not yet begun. The focus in this paper is on the history of the ALS as an example of how a technical construction project was conceived, designed, proposed, and validated within the framwork of a national laboratory funded largely by the DOE

  5. Determination of the scattered radiation at the Neutron Calibration Laboratory of IPEN using the shadow cone method

    Energy Technology Data Exchange (ETDEWEB)

    Alvarenga, Tallyson S.; Caldas, Linda V.E. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), São Paulo, SP (Brazil); Freitas, Bruno M. [Coordenacao de Pos-Graduacao e Pesquisa de Engenharia (PEN/COPPE/UFRJ), Rio de Janeiro, RJ (Brazil). Programa de Engenharia Nuclear; Fonseca, Evaldo S.; Pereira, Walsan W., E-mail: talvarenga@ipen.br, E-mail: lcaldas@ipen.br, E-mail: bfreitas@con.ufrj.br, E-mail: walsan@ird.gov.br, E-mail: evaldo@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2017-07-01

    Because of the increase in the demand for the calibration of neutron detectors, there is a need for new calibration services. In this context, the Calibration Laboratory of Instituto de Pesquisas Energéticas e Nucleares (IPEN), São Paulo, which already offers calibration services of radiation detectors with standard X, gamma, beta and alpha beams, has recently projected a new test laboratory for neutron detectors. This work evaluated the contribution of dispersed neutron radiation in this laboratory, using the cone shadow method and a Bonner sphere spectrometer to take the measurements at a distance of 100 cm from the neutron source. The dosimetric quantities H⁎(10) and H⁎(10) were obtained at the laboratory, allowing the calibration of detectors. (author)

  6. Determination of the scattered radiation at the Neutron Calibration Laboratory of IPEN using the shadow cone method

    International Nuclear Information System (INIS)

    Alvarenga, Tallyson S.; Caldas, Linda V.E.; Freitas, Bruno M.

    2017-01-01

    Because of the increase in the demand for the calibration of neutron detectors, there is a need for new calibration services. In this context, the Calibration Laboratory of Instituto de Pesquisas Energéticas e Nucleares (IPEN), São Paulo, which already offers calibration services of radiation detectors with standard X, gamma, beta and alpha beams, has recently projected a new test laboratory for neutron detectors. This work evaluated the contribution of dispersed neutron radiation in this laboratory, using the cone shadow method and a Bonner sphere spectrometer to take the measurements at a distance of 100 cm from the neutron source. The dosimetric quantities H⁎(10) and H⁎(10) were obtained at the laboratory, allowing the calibration of detectors. (author)

  7. Rock Formation and Cosmic Radiation Exposure Ages in Gale Crater Mudstones from the Mars Science Laboratory

    Science.gov (United States)

    Mahaffy, Paul; Farley, Ken; Malespin, Charles; Gellert, Ralph; Grotzinger, John

    2014-05-01

    The quadrupole mass spectrometer (QMS) in the Sample Analysis at Mars (SAM) suite of the Mars Science Laboratory (MSL) has been utilized to secure abundances of 3He, 21Ne, 36Ar, and 40Ar thermally evolved from the mudstone in the stratified Yellowknife Bay formation in Gale Crater. As reported by Farley et al. [1] these measurements of cosmogenic and radiogenic noble gases together with Cl and K abundances measured by MSL's alpha particle X-ray spectrometer enable a K-Ar rock formation age of 4.21+0.35 Ga to be established as well as a surface exposure age to cosmic radiation of 78+30 Ma. Understanding surface exposures to cosmic radiation is relevant to the MSL search for organic compounds since even the limited set of studies carried out, to date, indicate that even 10's to 100's of millions of years of near surface (1-3 meter) exposure may transform a significant fraction of the organic compounds exposed to this radiation [2,3,4]. Transformation of potential biosignatures and even loss of molecular structural information in compounds that could point to exogenous or endogenous sources suggests a new paradigm in the search for near surface organics that incorporates a search for the most recently exposed outcrops through erosional processes. The K-Ar rock formation age determination shows promise for more precise in situ measurements that may help calibrate the martian cratering record that currently relies on extrapolation from the lunar record with its ground truth chronology with returned samples. We will discuss the protocol for the in situ noble gas measurements secured with SAM and ongoing studies to optimize these measurements using the SAM testbed. References: [1] Farley, K.A.M Science Magazine, 342, (2013). [2] G. Kminek et al., Earth Planet Sc Lett 245, 1 (2006). [3] Dartnell, L.R., Biogeosciences 4, 545 (2007). [4] Pavlov, A. A., et al. Geophys Res Lett 39, 13202 (2012).

  8. Experience of radiation treatment of laboratory and farm animal feeds in Hungary

    International Nuclear Information System (INIS)

    Nadudvari, I.

    1979-01-01

    The testing of methods suitable for the disinfection and sterilization of farm and laboratory animal feeds, and research into the effects of the methods on feeds and animals, started in Hungary within the last decade. Altogether, 871 tonnes of feeds sterilized and disinfected by various methods were used in 1976 for the feeding of farm and laboratory animals. Gamma radiation was used for sterilization of approx. 90 tonnes. Feeds for SPF animals were sterilized mainly at 1.5 Mrad, but 2.0-2.5 Mrad levels were also used. Feeds for germ-free animals were sterilized at a level of 4.5 Mrad. Experience gained over the past ten years has shown that irradiation at levels between 1.5 and 2.5 Mrad is excellent for the sterilization of mouse, rat, guinea pig and poultry feeds. Quality deterioration of the feeds remained slight and only slight decomposition of vitamins A and E and among the essential amino acids of lysine was observed. The irradiated feeds were readily consumed by the animals. In some cases, e.g. mice and rats, it was observed that weight gain in groups receiving irradiated diets exceeded that in groups fed on untreated or autoclaved diets, and at the same time the daily feed consumption in the groups receiving irradiated feed also increased. No adverse effect on reproduction and health of the farm and laboratory animals fed on irradiated feeds was observed. In Hungary the widespread use of feeds sterilized by irradiation is hindered, in spite of several advantages over feeds sterilized by conventional methods, mainly by the high cost of the irradiation and the supplemental costs associated with special packing and delivery. Therefore only a modest increase in the utilization of irradiated feeds can be expected in the next few years. (author)

  9. Effectiveness of the implementation of a simple radiation reduction protocol in the catheterization laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Jurado-Román, Alfonso, E-mail: alfonsojuradoroman@gmail.com [Unidad de Hemodinámica, Servicio de Cardiología, Hospital General Universitario de Ciudad Real (Spain); Sánchez-Pérez, Ignacio; Lozano Ruíz-Poveda, Fernando; López-Lluva, María T.; Pinilla-Echeverri, Natalia; Moreno Arciniegas, Andrea [Unidad de Hemodinámica, Servicio de Cardiología, Hospital General Universitario de Ciudad Real (Spain); Agudo-Quilez, Pilar [Servicio de Cardiología, Hospital Universitario de La Princesa, Madrid (Spain); Gil Agudo, Antonio [Servicio de Radiofísica y Protección Radiológica, Hospital General Universitario de Ciudad Real (Spain)

    2016-07-15

    Background and purpose: A reduction in radiation doses at the catheterization laboratory, maintaining the quality of procedures is essential. Our objective was to analyze the results of a simple radiation reduction protocol at a high-volume interventional cardiology unit. Methods: We analyzed 1160 consecutive procedures: 580 performed before the implementation of the protocol and 580 after it. The protocol consisted in: the reduction of the number of ventriculographies and aortographies, the optimization of the collimation and the geometry of the X ray tube-patient-receptor, the use of low dose-rate fluoroscopy and the reduction of the number of cine sequences using the software “last fluoroscopy hold”. Results: There were no significant differences in clinical baseline features or in the procedural characteristics with the exception of a higher percentage of radial approach (30.7% vs 69.6%; p < 0.001) and of percutaneous coronary interventions of chronic total occlusions after the implementation of the protocol (2.1% vs 6.7%; p = 0,001). Angiographic success was similar during both periods (98.3% vs 99.2%; p = 0.2). There were no significant differences between both periods regarding the overall duration of the procedures (26.9 vs 29.6 min; p = 0.14), or the fluoroscopy time (13.3 vs 13.2 min; p = 0.8). We observed a reduction in the percentage of procedures with ventriculography (80.9% vs 7.1%; p < 0.0001) or aortography (15.4% vs 4.4%; p < 0.0001), the cine runs (21.8 vs 6.9; p < 0.0001) and the dose–area product (165 vs 71 Gyxcm{sup 2}; p < 0.0001). Conclusions: With the implementation of a simple radiation reduction protocol, a 57% reduction of dose–area product was observed without a reduction in the quality or the complexity of procedures. - Highlights: • This simple protocol can achieve a reduction in dose–area product of 57%. • It does not interfere with the quality or complexity of the procedures. • Full advantage of “Last Fluoroscopy

  10. Evaluation of radiation protection and technical procedures in Wad Madani Heart Diseases and Surgery Center (WHDSC) (cardiac catheterization laboratory)

    International Nuclear Information System (INIS)

    Gesmallah, A. H. A.

    2013-07-01

    The purpose of this study is conducted in order to evaluate the application of radiation protection program, evaluate the design of cardiac catheterization laboratory, evaluate the effectiveness of radiation protection devices, evaluate personal monitoring, usage of G-Arm x-ray machine, to evaluate the responsibilities of radiation protection officer (RPO), to assess monitoring devices if available, and to assess patient patient dose in Wad Madani hear disease and surgery center in a period from march 2013 to june 2013. The most data in this study was obtained from the results of the team of quality assurance and control of radiation safety institute when they visited hospital on 14/2/2011 for inspection and calibration for issue of registration and licenses, except the data of patients dose which obtained from exposure parameters and dosimetric information's in the archive of G-arm x-ray fluoroscopic machine (which were 110 of cardiac catheterization diagnostic and therapeutic cases, 60 of adult patients and 50 of children. The patient data included age, weight, kv, mAs, DAP, air kerma, and fluoro time. The results of this study show that there is radiation protection program need correction and partially applied, the design of cardiac catheterization laboratory is accepted according to radiation safety institute team of quality control. Also the study shows that the radiation protection program devices are available and good condition and enough in number. The study shows that there are no personal monitoring devices and services and the radiological technologist are well trained to dial with the G-arm x-ray machine and to apply the radiation protection program effectively. Also the study states that the radiation protection officer could apply his responsibilities partially. Finally the study shows that there is a direct linear relationship between the patient's weight and (DAP, air kerma, kv, and mAs) concludes that there is excessive radiation dose in cardiac

  11. Quality control of calibration system for area monitors at National Laboratory of Metrology from Ionizing Radiations (LNMRI)

    International Nuclear Information System (INIS)

    Ramos, M.M.O.; Freitas, L.C. de

    1992-01-01

    The quality control of equipment used in calibration from the National Laboratory of Metrology on Ionizing Radiations is presented, with results of standard measure systems and irradiation system. Tables and graphics with the quality of systems are also shown. (C.G.C.)

  12. Direct Penetrating Radiation Monitoring Systems: Technical Evaluation for Use at Area G, Los Alamos National Laboratory

    International Nuclear Information System (INIS)

    D. Kraig; W. A. Treadaway; R. J. Wechsler

    1999-01-01

    Recent advances and commercialization of electret-ion-chamber (EIC) technology for photon measurements prompted us to consider EKs as a replacement for our TLD system. After laboratory tests indicated that both systems gave adequate results for controlled exposures, throughout 1998 we conducted field tests with paired TLDs and EICS, in LANL technical areas and in public areas. We had approximately 30 paired sampling sites at Area G. At each sampling site, we deployed three TLDs and three EICS. The EICS were contained in air-tight jars, each of which was placed in a Tyvek envelope and hung about 1 m above the ground. The dosimeters were read (and, if necessary, replaced) every three months. At the sites outside Area G, the TLD readings for the first two quarters were statistically significantly higher than those of the EICS: group average exposures were 38 and 36, compared with 33 mR (both quarters) for the EICS; during quarter 3, the EIC average (40 mR) was higher than the TLD average (34 mR); and during quarter 4, the two systems were statistically the same: EIC = 42, TLD = 41 with a p-value of 0.61. We are still evaluating these differences and performing additional laboratory studies to determine causes. At the Area G sites,we noticed that several of the TLDs gave much higher readings than their co-located EICS; we believe that the TLDs were over-responding by ∼50% to the low-energy (60-keV) gamma radiation associated with 241 Am, whereas the EICS were responding accurately. We conclude that EICS are more accurate at a wide range of gamma energies and are preferable to TLDs in environments where a significant fraction of the photons are low energy

  13. Immediate Dose Assessment for Radiation Accident in Laboratory Containing Gamma Source and/or Neutron Source

    International Nuclear Information System (INIS)

    Ahmed, E.M.

    2012-01-01

    One of the most important safety requirements for any place containing radiation sources is an accurate and fast way to assess the dose rate in both normal and accidental case. In normal case, the source is completely protected inside its surrounded shields in case of non use. In some cases this source may stuck outside its shield. In this case the walls of the place act as a shield. Many studies were carried for obtaining the most appropriate materials that may be used as shielding depending on their efficiency and also their cost. As concrete- with different densities- is the most available constructive material, this study presented a theoretical model using MCNP-4B code, based on Monte Carlo method to estimate the dose rate distribution in a laboratory with concrete walls in case of source stuck accident. The study dealt with Cs-137 as gamma source and Am-Be-241 as neutron source. Two different densities of concrete and also different thicknesses of walls were studied. The used model was verified by comparing the results with a practical study concerning with the effect of adding carbon powder to the concrete. The results showed good agreement

  14. Laboratory Experiments on Rotation and Alignment of the Analogs of Interstellar Dust Grains by Radiation

    Science.gov (United States)

    Abbas, M. M.; Craven, P. D.; Spann, J. F.; Tankosic, D.; LeClair, A.; Gallagher, D. L.; West, E. A.; Weingartner, J. C.; Witherow, W. K.; Tielens, A. G. G. M.

    2004-01-01

    The processes and mechanisms involved in the rotation and alignment of interstellar dust grains have been of great interest in astrophysics ever since the surprising discovery of the polarization of starlight more than half a century ago. Numerous theories, detailed mathematical models, and numerical studies of grain rotation and alignment with respect to the Galactic magnetic field have been presented in the literature. In particular, the subject of grain rotation and alignment by radiative torques has been shown to be of particular interest in recent years. However, despite many investigations, a satisfactory theoretical understanding of the processes involved in subject, we have carried out some unique experiments to illuminate the processes involved in the rotation of dust grains in the interstellar medium. In this paper we present the results of some preliminary laboratory experiments on the rotation of individual micron/submicron-sized, nonspherical dust grains levitated in an electrodynamic balance evacuated to pressures of approximately 10(exp -3) to 10(exp -5) torr. The particles are illuminated by laser light at 5320 A, and the grain rotation rates are obtained by analyzing the low-frequency (approximately 0 - 100 kHz) signal of the scattered light detected by a photodiode detector. The rotation rates are compared with simple theoretical models to retrieve some basic rotational parameters. The results are examined in light of the current theories of alignment.

  15. Laboratory Experiments on Rotation of Micron Size Cosmic Dust Grains with Radiation

    Science.gov (United States)

    Abbas, M. M.; Craven, P. D.; Spann, J. F.; Tankosic, D.; LeClair, A.; Gallagher, D. L.; West, E.; Weingartner, J.; Witherow, W. K.

    2004-01-01

    The processes and mechanisms involved in the rotation and alignment of interstellar dust grains have been of great interest in astrophysics ever since the surprising discovery of the polarization of starlight more than half a century ago. Numerous theories, detailed mathematical models and numerical studies of grain rotation and alignment along the Galactic magnetic field have been presented in the literature. In particular, the subject of grain rotation and alignment by radiative torques has been shown to be of particular interest in recent years. However, despite many investigations, a satisfactory theoretical understanding of the processes involved in grain rotation and alignment has not been achieved. As there appears to be no experimental data available on this subject, we have carried out some unique experiments to illuminate the processes involved in rotation of dust grains in the interstellar medium. In this paper we present the results of some preliminary laboratory experiments on the rotation of individual micron/submicron size nonspherical dust grains levitated in an electrodynamic balance evacuated to pressures of approx. 10(exp -3) to 10(exp -5) torr. The particles are illuminated by laser light at 5320 A, and the grain rotation rates are obtained by analyzing the low frequency (approx. 0-100 kHz) signal of the scattered light detected by a photodiode detector. The rotation rates are compared with simple theoretical models to retrieve some basic rotational parameters. The results are examined in the light of the current theories of alignment.

  16. DOE life-span radiation effects studies at Pacific Northwest Laboratory

    International Nuclear Information System (INIS)

    Thompson, R.C.; Cross, F.T.; Dagle, G.E.; Park, J.F.; Sanders, C.L.

    1986-01-01

    Major life-span radiation effects studies at Pacific Northwest Laboratory fall into three categories: (1) studies with beagle dogs exposed to plutonium compounds via a single inhalation; (2) studies with dogs and rats exposed chronically via inhalation to various combinations and concentrations of radon, radon daughters, and other components of uranium mine atmospheres; and (3) a study in which rats are exposed via single inhalation, in very large numbers, to very low concentrations of 239 PuO 2 . Exposure of beagles currently on study was initiated in 1970 with 239 PuO 2 , in 1973 with 238 PuO 2 , and in 1976 with 239 Pu(NO 3 ) 4 . These experiments involve more than 500 animals, many of them still alive. Experiments seeking to explain the increased incidence of lung cancer in uranium miners have been in progress since 1966. Present emphasis is on studies with rats, in an attempt to define dose-effect relationships at the lowest feasible radon-daughter exposure levels. Our very-low-level experiment with inhaled 239 PuO 2 in rats, with exposures still under way, includes 1000 rats in the control group and 1000 rats in the lowest-exposure group, where life-span lung doses of <5 rads are anticipated

  17. A laboratory experimental setup for photo-absorption studies using synchrotron radiation

    CERN Document Server

    Shastri, A; Saraswati, P; Sunanda, K

    2002-01-01

    The photophysics beamline, which is being installed at the 450 MeV Synchrotron Radiation Source (SRS), Indus-l, is a medium resolution beamline useful for a variety of experiments in the VUV region viz. 500-2000 A. One of the major applications of this beamline is gas-phase photo-absorption studies. An experimental set up to be used for these experiments was designed, developed and tested in our laboratory. The setup consists of a high vacuum absorption cell, 1/4 m monochromator and detection system. For the purpose of testing, xenon and tungsten continuum sources were used and absorption spectra were recorded in the UV region. This setup was used to record the absorption spectrum of a few molecules like acetone, ammonia, benzene, formaldehyde and acetaldehyde in order to evaluate the performance of the experimental system which will subsequently be used with the photophysics beamline. Details of the design, fabrication and testing of the absorption cell and experimental procedures are presented in this repor...

  18. Organisation in the Harwell Radiochemistry Laboratories for Dealing with Radiation Accidents

    Energy Technology Data Exchange (ETDEWEB)

    Hudswell, F. [Atomic Energy Research Establishment, Harwell, Didcot, Berks. (United Kingdom)

    1969-10-15

    The radiochemistry laboratories contain extensive facilities for the handling of large quantities of alpha emitters and beta/gamma active materials. Safety in this area is surveyed by a local safety committee, which has been responsible for the development of both the working rules for the avoidance of radiation accidents and the organisation for dealing with them should they occur. The emergency control organisation within the high activity area is linked with and approved by the site organisation. Local control within the building can be undertaken by any one of a number of senior staff, who is advised by a health physicist, engineer and other scientists, and who delegates executive responsibility for emergency stations to a number of scientific and engineering staff. An incident in the area which affects other areas in the establishment is controlled by the establishment emergency organisation but will also involve the local control post as a source of action and information. Reciprocally, local control may be required to receive evacuees from a remote incident area. Safety manuals and emergency plans are revised periodically. Exercises are mounted several times a year and are followed by discussions of the weaknesses found. Attempts are made to remedy the weaknesses in subsequent exercises. (author)

  19. Radiation tolerance in the fruit fly, Drosophila Melanogaster - effects of laboratory culturing and stages in life cycle

    International Nuclear Information System (INIS)

    Vas, Iril Prima; Naik, Pramila; Kumar, Vineeth; Naik, Prathima; Patil, Rajashekar K.

    2013-01-01

    Radiation induced damages are due to direct effect of radiation energy or through free radical generation. Recent studies suggest Drosophila to be a good animal model to study radiation tolerance. The present study on female Drosophila melanogaster was conducted to observe 1. Variations in larval and adult radiation tolerance 2. Variations in laboratory culture and field populations of Drosophila. Third instar larvae were exposed to gamma radiation of 6, 10, 20, 30, 40 and 50 Gy in gamma chamber GC 5000 (BRT, India). Larvae of flies collected from the field were reared for two generations in the lab before irradiation. The laboratory cultured files were from stocks that were maintained for more than 1000 generations. The larvae of field populations had higher survival rate at 51% as compared to 43% in case of cultured flies and thus more resistant. The III instar larval stage (lab culture) had a LD50 of 26 Gy as compared to LD 50 of 928 Gy in case of adult flies have ∼ 160 times higher tolerance compared to humans. Prolonged rearing comparable to 'domestication' might have induced reduction in tolerance. Larval stages have a lower tolerance than adults possibly due to higher metabolic rate. Adults are post-mitotic in nature with very low rate of cell division. This may contribute to higher tolerance. This however is in contradiction to studies of midge (Chironomous) where larvae also have higher tolerance. (author)

  20. Laboratory for Calibration of Gamma Radiation Measurement Instruments (LabCal) of Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN) from Brazilian Army Technology Center (CTEx)

    International Nuclear Information System (INIS)

    Amorim, Aneuri de; Balthar, Mario Cesar V.; Santos, Avelino; Vilela, Paulo Ricardo T. de; Oliveira, Luciano Santa Rita; Penha, Paulo Eduardo C. de Oliveira; Gonzaga, Roberto Neves; Andrade, Edson Ramos de; Oliveira, Celio Jorge Vasques de; Fagundes, Luiz Cesar S.

    2016-01-01

    This paper describes the calibration laboratory deployment steps (LABCAL) gamma ionizing radiation measuring instruments in the Army Technology Center, CTEx. Initially the calibration of radiation monitors will be held in the dosimetric quantity air kerma and operational quantity ambient dose equivalent H*(d). The LABCAL / CTEx has not yet authorized by CASEC / CNEN. This laboratory aims to calibrate the ionizing radiation instruments used by the Brazilian Army. (author)

  1. Implementation of quality assurance and quality control in the Nuclear Analytical Laboratory of the Estonian Radiation Protection Centre

    International Nuclear Information System (INIS)

    Koeoep, T.; Jakobson, E.

    2002-01-01

    The Analytical Laboratory of the Estonian Radiation Protection Centre is in the process of implementing the system of Quality Assurance (QA) and Quality Control (QC) in the framework of the IAEA TC Project RER/2/004/ 'QA/QC of Nuclear Analytical Techniques'. The draft Quality Manual with annexes has been prepared accordingly to the ISO 17025 Guide, documents and other printed material delivered on the seminars of the project. The laboratory supply has been supplemented with necessary equipment for guaranteeing of quality. Proficiency testing included in the project has been performed successfully. (author)

  2. Annual reports of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, (No. 23, 24, 25)

    International Nuclear Information System (INIS)

    1992-09-01

    Research activities of Osaka Laboratory for Radiation Chemistry, JAERI during three year period from April 1, 1989 through March 31, 1992 are described. The latest report. for 1988, is JAERI-M 91-054. Detailed descriptions of the activities are presented in the following subjects: laser-induced organic synthesis, modification of polymer surface by laser irradiation, polymerization and modification of polymers by electron beam, and electron beam dosimetry. (author) 77 refs

  3. Elementary computation of radiation doses and shieldings for radiochemical laboratories; Calculo Elemental de dosis y blindajes para laboratorios radioquimicos

    Energy Technology Data Exchange (ETDEWEB)

    Jimeno de Osso, F

    1971-07-01

    Simple procedures for the calculation of radiation exposition, half thickness, shield thickness, etc. are described and equations and graphs are included for those gamma-emitting radionuclides, that are more often used in radiochemical laboratories. Application is made of these procedures to three radionuclides, bromine-82, sodium-24 and cobalt-60 which cover a rather wl.de energy range; theoretical results are compared with those obtained from experimental measurements. (Author) 23 refs.

  4. National laboratories

    International Nuclear Information System (INIS)

    Moscati, G.

    1983-01-01

    The foundation of a 'National Laboratory' which would support a Research center in synchrotron radiation applications is proposed. The essential features of such a laboratory differing of others centers in Brazil are presented. (L.C.) [pt

  5. A review of the probabilistic safety assessment of the Radiation Monitor Calibration Laboratory of the Almirante Alvaro Alberto Power Plant

    International Nuclear Information System (INIS)

    Gomes, Erica Cupertino

    2005-03-01

    The main purpose of this work is to update the PSA study of the Radiation Monitor Calibration Laboratory of the Almirante Alvaro Alberto Power Station taking into account new information. It is considered in this study an evaluation of the human reliability analysis in the calibration procedure of the radiation monitors, and for such the THERP modeling is used, as well as the use of the Bayesian approach for the calculation of the equipment failure probabilities used by the operators. Some accident scenarios of external origin were incorporated for evaluating their importance for an accident that might expose a worker to gamma radiation. A catastrophic failure is analyzed in the diesel generators 3 and 4, whose building is nearby the laboratory, as well as the route of change and the transportation of the steam generator of the nuclear power plant since the laboratory is located in the plant controlled area. Although more accidents scenarios are considered in this work, a conservative approach was not used and thus a smaller radiological risk was obtained. (author)

  6. The GSF secondary standard dosimetry laboratory for photon and beta radiation

    International Nuclear Information System (INIS)

    Eckerl, H.; Nahrstedt, U.

    1986-03-01

    A brief outline of the laboratory's tasks and a detailed description of its layout and equipment is given. The laboratory contains a Co-60 irradiation unit, a Cs-137 irradiation unit, a panoramic irradiation unit for different nuclide sources, a 160- and 420 kV X-ray unit, a beta-irradiation unit and a measuring and control room. The calibration laboratory is equipped with reference and field dosemeters. (DG)

  7. Mars' surface radiation environment measured with the Mars science laboratory's curiosity rover

    NARCIS (Netherlands)

    Hassler, D.M.; Zeitlin, C.; Wimmer-Schweingruber, R.F.; Ehresmann, B.; Rafkin, S.; Eigenbrode, J.L.; Brinza, D.E.; Weigle, G.; Böttcher, S.; Böhm, E.; Burmeister, S.; Guo, J.; Köhler, J.; Martin, C.; Reitz, G.; Cucinotta, F.A.; Kim, M.-H.; Grinspoon, D.; Bullock, M.A.; Posner, A.; Gómez-Elvira, J.; Vasavada, A.; Grotzinger, J.P.; MSL Science Team, the|info:eu-repo/dai/nl/292012217

    2014-01-01

    The Radiation Assessment Detector (RAD) on the Mars Science Laboratory’s Curiosity rover began making detailed measurements of the cosmic ray and energetic particle radiation environment on the surface of Mars on 7 August 2012. We report and discuss measurements of the absorbed dose and dose

  8. Evaluation of ambient radiation levels in positron emission tomography/computed tomography in microPET/CT laboratory

    International Nuclear Information System (INIS)

    Sarmento, Daniele Martins

    2016-01-01

    Micro PET/CT scanner is an essential tool generally used for small animal molecular imaging. Fluorine-18-labeled fluorodeoxyglucose is the most widely used radioisotope in this technique. The present study aimed to evaluate the radiation levels in a micro PET/CT research laboratory of the Radiopharmacy Center at IPEN-CNEN / SP, in order to accomplish both national standards and international recommendations. The radioprotection team has classified the laboratory as supervised area; even this laboratory does not require the adoption of specific measures for protection and safety, should be done regular re-evaluation of the conditions of occupational exposures. Workplace monitoring and individual control assessment were carried out to ensure the radiological protection of all workers directly involved in handling the scanner. Initially, there was conducted a radiometric survey, as well as measurements of the external radiation level in the workplace and its surroundings. To achieve this goal, there were placed nine thermoluminescent dosimeters of CaSO 4 :Dy in preselected locations. Monthly evaluations of the occupationally exposed individuals were carried out through the use of TL dosimeters, ported in the workers' chest. Moreover, whole body measurements were performed every six months. The study period was about two-years which started in April 2014. All tests to evaluate micro PET/CT performance were based on the standard protocol of the equipment in accordance with the standard developed by the Animal PET Standard Task Force. Present study's results demonstrated that the ambient radiation levels (ambient and effective estimated radiation dose), as well as the effective shielding equipment are both adequate. This study emphasizes that it is essential to strictly follow the principles of radioprotection in workplace, whenever researches involve radioactive unsealed sources. (author)

  9. Fruit Flies Provide New Insights in Low-Radiation Background Biology at the INFN Underground Gran Sasso National Laboratory (LNGS).

    Science.gov (United States)

    Morciano, Patrizia; Cipressa, Francesca; Porrazzo, Antonella; Esposito, Giuseppe; Tabocchini, Maria Antonella; Cenci, Giovanni

    2018-06-04

    Deep underground laboratories (DULs) were originally created to host particle, astroparticle or nuclear physics experiments requiring a low-background environment with vastly reduced levels of cosmic-ray particle interference. More recently, the range of science projects requiring an underground experiment site has greatly expanded, thus leading to the recognition of DULs as truly multidisciplinary science sites that host important studies in several fields, including geology, geophysics, climate and environmental sciences, technology/instrumentation development and biology. So far, underground biology experiments are ongoing or planned in a few of the currently operating DULs. Among these DULs is the Gran Sasso National Laboratory (LNGS), where the majority of radiobiological data have been collected. Here we provide a summary of the current scenario of DULs around the world, as well as the specific features of the LNGS and a summary of the results we obtained so far, together with other findings collected in different underground laboratories. In particular, we focus on the recent results from our studies of Drosophila melanogaster, which provide the first evidence of the influence of the radiation environment on life span, fertility and response to genotoxic stress at the organism level. Given the increasing interest in this field and the establishment of new projects, it is possible that in the near future more DULs will serve as sites of radiobiology experiments, thus providing further relevant biological information at extremely low-dose-rate radiation. Underground experiments can be nicely complemented with above-ground studies at increasing dose rate. A systematic study performed in different exposure scenarios provides a potential opportunity to address important radiation protection questions, such as the dose/dose-rate relationship for cancer and non-cancer risk, the possible existence of dose/dose-rate threshold(s) for different biological systems and

  10. Radiological risk assessment of isotope laboratories according to the requirements of the radiation protection ordinance and the protective labour legislation

    International Nuclear Information System (INIS)

    Stuerm, R.P.; Kuster, M.; Traub, K.

    2001-01-01

    According to the Swiss Radiation Safety Ordinance the supervising authority may require a safety report from the operator of a radioactive laboratory (Art.95) and establish the methodology of the risk analysis. Isotope laboratories of the chemical industry are supervised by Swiss accident insurance agency (SUVA). In that respect SUVA safeguards both radiation protection issues and general protection of the workers and established guide lines in order to assess conventional risks in industrial premises. In these conventional analysis the working process is analysed according to its possible detriment (death, severe invalidity, slight invalidity, injury with absence, injury without absence) and the probability of occurrence (frequent, seldom, rare, improbable, virtually impossible). According to this the risks are categorised in a matrix as 'high', 'medium' and 'low'. SUVA requested such a risk analysis for two isotope laboratories of B type in Basel in which on the one hand the hazard to the workers on the other hand to the public should be analysed and radiologically assessed. It was proposed to use a methodology established in workers safety and the insurance section. This required a comparison of risks of radiation doses in mSv to the consequences of conventional working accidents (death, invalidity) and the risk perception of the public and politicians. In this paper this risk matrix derived in discussions among the supervising body, the company management, the laboratory head and workers is described. In the opinion of the authors such a comparison between radiological and conventional risks has not been performed up to now and the results obtained here are open to discussion. (orig.) [de

  11. Development of a quality assurance program for ionizing radiation secondary calibration laboratories

    International Nuclear Information System (INIS)

    Heaton, H.T. II; Taylor, A.R. Jr.

    1993-01-01

    For calibration laboratories, routine calibrations of instruments meeting stated accuracy goals are important. One method of achieving the accuracy goals is to establish and follow a quality assurance program designed to monitor all aspects of the calibration program and to provide the appropriate feedback mechanism if adjustments are needed. In the United States there are a number of organizations with laboratory accreditation programs. All existing accreditation programs require that the laboratory implement a quality assurance program with essentially the same elements in all of these programs. Collectively, these elements have been designated as a Measurement Quality Assurance (MQA) program. This paper will briefly discuss the interrelationship of the elements of an MQA program. Using the Center for Devices and Radiological Health (CDRH) X-ray Calibration Laboratory (XCL) as an example, it will focus on setting up a quality control program for the equipment in a Secondary Calibration Laboratory

  12. Development of a quality assurance program for ionizing radiation secondary calibration laboratories

    Energy Technology Data Exchange (ETDEWEB)

    Heaton, H.T. II; Taylor, A.R. Jr. [Center for Devices and Radiological Health, Rockville, MD (United States)

    1993-12-31

    For calibration laboratories, routine calibrations of instruments meeting stated accuracy goals are important. One method of achieving the accuracy goals is to establish and follow a quality assurance program designed to monitor all aspects of the calibration program and to provide the appropriate feedback mechanism if adjustments are needed. In the United States there are a number of organizations with laboratory accreditation programs. All existing accreditation programs require that the laboratory implement a quality assurance program with essentially the same elements in all of these programs. Collectively, these elements have been designated as a Measurement Quality Assurance (MQA) program. This paper will briefly discuss the interrelationship of the elements of an MQA program. Using the Center for Devices and Radiological Health (CDRH) X-ray Calibration Laboratory (XCL) as an example, it will focus on setting up a quality control program for the equipment in a Secondary Calibration Laboratory.

  13. Hazards analysis for the E.O. Lawrence Berkeley National Laboratory x-ray absorption experiments to be performed at Stanford Synchrotron Radiation Laboratory

    International Nuclear Information System (INIS)

    Edelstein, N.M.; Shuh, D.K.; Bucher, J.B.

    1995-04-01

    The objective of this experiment is to determine the oxidation state(s) of neptunium (Np) in mouse skeleton and in soft tissue by X-ray Absorption Near Edge Structure (XANES). If Np is present in sufficient concentration, X-ray Absorption Fine Structure (XAFS) data will be obtained in order to further identify the Np species present. These data will be crucial in understanding the metabolic pathway of Np in mammals which will help in the design of reagents which can eliminate Np from mammals in the event of accidental exposure. It is proposed to run these experiments at the Standard Synchrotron Radiation Laboratory (SSRL). This laboratory is a DOE national user facility located at the Stanford Linear Accelerator Center (SLAC). The 237 Np nucleus decays by the emission of an alpha particle and this particle emission is the principal hazard in handling Np samples. This hazard is mitigated by physical containment of the sample which stops the alpha particles within the containment. The total amount of Np material that will be shipped to and be at SSRL at any one time will be less than 1 gram. This limit on the amount of Np will ensure that SLAC remains a low hazard, non-nuclear facility. The Np samples will be solids or Np ions in aqueous solution. The Np samples will be shipped to SSRL/SLAC OHP. SLAC OHP will inventory the samples and swipe the containers holding the triply contained samples, and then bring them to the SSRL Actinide trailer located outside building 131. The QA counting records from the samples, as measured at LBNL, will be provided to SSRL and SLAC OHP prior to the arrival of the samples at SLAC OHP. In addition, strict monitoring of the storage and experimental areas will be performed in accordance with SLAC/OHP radiation protection procedures to ensure against the release of contamination

  14. Upgrading the Medical Physics Calibration Laboratory Towards ISO/IEC 17025: Radiation Standards and Calibration in Diagnostic Radiology

    International Nuclear Information System (INIS)

    Asmaliza Hashim; Muhammad Jamal Md Isa; Abd Aziz Mhd Ramli; Wan Hazlinda Ismail; Norhayati Abdullah; Shahrul Azlan Azizan; Siti Sara Deraman; Nor Azlin Azraai; Md Khairusalih Md Zin

    2010-01-01

    Calibration of quality control (QC) test tools used in diagnostic radiology is legally required under the Ministry of Health (MOH) requirement. The Medical Physics Calibration Laboratory of the Malaysian Nuclear Agency is the national focal point for the calibration of quality control test tools used in diagnostic radiology. The Medical Physics Calibration Laboratory has measurement traceability to primary standard dosimetry laboratory (Physikalisch-Technische Bundesanstalt (PTB)), thus providing an interface between the primary standard dosimetry laboratory and Malaysian hospitals, clinics and license class H holder. The Medical Physics Calibration Laboratory facility is comprised of a constant potential x-ray system with a capability of 160 kV tube and a series of reference and working standard ion chambers. The stability of reference and working standard ion chambers was measured using strontium-90. Dosimetric instruments used in diagnostic radiology is calibrated in terms of air kerma to comply with an International Code of Practices of dosimetry for example IAEA's Technical Report Series number 457. The new series of standard radiation qualities was established based on ISO/IEC 61267. The measurement of beam homogeneity was measured using film and ion chamber to define the field size at certain distance and kV output was measured using the spectrometer and non-invasive kVp meter. The uncertainties measurement was determined with expended uncertainties to a level of confidence of approximately 95% (coverage factor k=2). This paper describes the available facility and the effort of the Medical Physics Calibration Laboratory to upgrade the laboratory towards ISO/IEC 17025. (author)

  15. Use of the NASA Space Radiation Laboratory at Brookhaven National Laboratory to Conduct Charged Particle Radiobiology Studies Relevant to Ion Therapy.

    Science.gov (United States)

    Held, Kathryn D; Blakely, Eleanor A; Story, Michael D; Lowenstein, Derek I

    2016-06-01

    Although clinical studies with carbon ions have been conducted successfully in Japan and Europe, the limited radiobiological information about charged particles that are heavier than protons remains a significant impediment to exploiting the full potential of particle therapy. There is growing interest in the U.S. to build a cancer treatment facility that utilizes charged particles heavier than protons. Therefore, it is essential that additional radiobiological knowledge be obtained using state-of-the-art technologies and biological models and end points relevant to clinical outcome. Currently, most such ion radiotherapy-related research is being conducted outside the U.S. This article addresses the substantial contributions to that research that are possible at the NASA Space Radiation Laboratory (NSRL) at Brookhaven National Laboratory (BNL), which is the only facility in the U.S. at this time where heavy-ion radiobiology research with the ion species and energies of interest for therapy can be done. Here, we briefly discuss the relevant facilities at NSRL and how selected charged particle biology research gaps could be addressed using those facilities.

  16. Computer-based nuclear radiation detection and instrumentation teaching laboratory system

    International Nuclear Information System (INIS)

    Ellis, W.H.; He, Q.

    1993-01-01

    The integration of computers into the University of Florida's Nuclear Engineering Sciences teaching laboratories is based on the innovative use of MacIntosh 2 microcomputers, IEEE-488 (GPIB) communication and control bus system and protocol, compatible modular nuclear instrumentation (NIM) and test equipment, LabVIEW graphics and applications software, with locally prepared, interactive, menu-driven, HyperCard based multi-exercise laboratory instruction sets and procedures. Results thus far have been highly successful with the majority of the laboratory exercises having been implemented

  17. Radiation Effects and Component Hardening testing program at the Oak Ridge National Laboratory

    International Nuclear Information System (INIS)

    Draper, J.V.; Weil, B.S.; Chesser, J.B.

    1993-01-01

    This paper describes Phase II of the Radiation Effects and Component Hardening (REACH) testing program, performed as part of the joint collaborative agreement between the United States Department of Energy (USDOE) and the Power Reactor and Nuclear Fuel Development Corporation (PNC) of Japan, Components and materials were submitted to 10 5 R/hr gamma radiation fields for 10,000 hr, producing accumulated doses of 10 9 R; most performed as expected

  18. The LLNL Multiuser Tandem Laboratory computer-controlled radiation monitoring system

    International Nuclear Information System (INIS)

    Homann, S.G.

    1992-01-01

    The Physics Department of the Lawrence Livermore National Laboratory (LLNL) recently constructed a Multiuser Tandem Laboratory (MTL) to perform a variety of basic and applied measurement programs. The laboratory and its research equipment were constructed with support from a consortium of LLNL Divisions, Sandia National Laboratories Livermore, and the University of California. Primary design goals for the facility were inexpensive construction and operation, high beam quality at a large number of experimental stations, and versatility in adapting to new experimental needs. To accomplish these goals, our main design decisions were to place the accelerator in an unshielded structure, to make use of reconfigured cyclotrons as effective switching magnets, and to rely on computer control systems for both radiological protection and highly reproducible and well-characterized accelerator operation. This paper addresses the radiological control computer system

  19. Mortality among workers at Oak Ridge National Laboratory. Evidence of radiation effects in follow-up through 1984

    International Nuclear Information System (INIS)

    Wing, S.; Shy, C.M.; Wood, J.L.; Wolf, S.; Cragle, D.L.; Frome, E.L.

    1991-01-01

    White men hired at the Oak Ridge (Tenn) National Laboratory between 1943 and 1972 were followed up for vital status through 1984 (N = 8318, 1524 deaths). Relatively low mortality compared with that in US white men was observed for most causes of death, but leukemia mortality was elevated in the total cohort (63% higher, 28 deaths) and in workers who had at some time been monitored for internal radionuclide contamination (123% higher, 16 deaths). Median cumulative dose of external penetrating radiation was 1.4 mSv; 638 workers had cumulative doses above 50 mSv (5 rem). After accounting for age, birth cohort, a measure of socioeconomic status, and active worker status, external radiation with a 20-year exposure lag was related to all causes of death (2.68% increase per 10 mSv) primarily due to an association with cancer mortality (4.94% per 10 mSv). Studies of this population through 1977 did not find radiation-cancer mortality associations, and identical analyses using the shorter follow-up showed that associations with radiation did not appear until after 1977. The radiation-cancer dose response is 10 times higher than estimates from the follow-up of survivors of the bombings of Hiroshima and Nagasaki, Japan, but similar to one previous occupational study. Dose-response estimates are subject to uncertainties due to potential problems, including measurement of radiation doses and cancer outcomes. Longer-term follow-up of this and other populations with good measurement of protracted low-level exposures will be critical to evaluating the generalizability of the results reported herein

  20. Electron/positron measurements obtained with the Mars Science Laboratory Radiation Assessment Detector on the surface of Mars

    Energy Technology Data Exchange (ETDEWEB)

    Koehler, J.; Wimmer-Schweingruber, R.F.; Appel, J. [Kiel Univ. (Germany). Inst. of Experimental and Applied Physics; and others

    2016-04-01

    The Radiation Assessment Detector (RAD), on board the Mars Science Laboratory (MSL) rover Curiosity, measures the energetic charged and neutral particles and the radiation dose rate on the surface of Mars. Although charged and neutral particle spectra have been investigated in detail, the electron and positron spectra have not been investigated yet. The reason for that is that they are difficult to separate from each other and because of the technical challenges involved in extracting energy spectra from the raw data. We use GEANT4 to model the behavior of the RAD instrument for electron/positron measurements.We compare Planetocosmics predictions for different atmospheric pressures and different modulation parameters Φ with the obtained RAD electron/positron measurements.We find that the RAD electron/positron measurements agree well with the spectra predicted by Planetocosmics. Both RAD measurements and Planetocosmics simulation show a dependence of the electron/positron fluxes on both atmospheric pressure and solar modulation potential.

  1. A large area transition radiation detector to measure the energy of muons in the Gran Sasso underground laboratory

    International Nuclear Information System (INIS)

    Barbarito, E.; Bellotti, R.; Cafagna, F.; Castellano, M.; De Cataldo, G.; De Marzo, C.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Guarnaccia, P.; Mazziotta, M.N.; Mongelli, M.; Montaruli, T.; Perchiazzi, M.; Raino, A.; Sacchetti, A.; Spinelli, P.

    1995-01-01

    We have designed and built a transition radiation detector of 36 m 2 area in order to measure the residual energy of muons penetrating in the Gran Sasso cosmic ray underground laboratory up to the TeV region. It consists of three adjacent modules, each of 2x6 m 2 area. Polystyrene square tubes, filled with a argon-carbon dioxide gas mixture, and polyethylene foam layers are used as proportional detectors and radiators respectively. We cover such a large surface with only 960 channels that provide adequate energy resolution and particle tracking for the astroparticle physics items to investigate. The detector has been calibrated using a reduced size prototype in a test beam. Results from one module exposed to cosmic rays at sea level are shown. (orig.)

  2. The Advanced Light Source: A new 1.5 GeV synchrotron radiation facility at the Lawrence Berkeley Laboratory

    International Nuclear Information System (INIS)

    Schlachter, A.S.

    1989-01-01

    The Advanced Light Source (ALS), now under construction at the Lawrence Berkeley Laboratory, is being planned as a national user facility for the production of high-brightness and partially coherent x-ray and ultraviolet synchrotron radiation. The ALS is based on a low-emittance electron storage ring optimized for operation at 1.5 GeV with insertion devices in 11 long straight sections and up to 48 bend-magnet ports. High-brightness photon beams, from less than 10 eV to more than 1 keV, will be produced by undulators, thereby providing many research opportunities in materials and surface science, biology, atomic physics and chemistry. Wigglers and bend magnets will provide high-flux, broad-band radiation at energies to 10 keV. 6 refs., 10 figs., 2 tabs

  3. Polarization-based enhancement of ocean color signal for estimating suspended particulate matter: radiative transfer simulations and laboratory measurements.

    Science.gov (United States)

    Liu, Jia; He, Xianqiang; Liu, Jiahang; Bai, Yan; Wang, Difeng; Chen, Tieqiao; Wang, Yihao; Zhu, Feng

    2017-04-17

    Absorption and scattering by molecules, aerosols and hydrosols, and the reflection and transmission over the sea surface can modify the original polarization state of sunlight. However, water-leaving radiance polarization, containing embedded water constituent information, has largely been neglected. Here, the efficiency of the parallel polarization radiance (PPR) for enhancing ocean color signal of suspended particulate matter is examined via vector radiative transfer simulations and laboratory experiments. The simulation results demonstrate that the PPR has a slightly higher ocean color signal at the top-of-atmosphere as compared with that of the total radiance. Moreover, both the simulations and laboratory measurements reveal that, compared with total radiance, PPR can effectively enhance the normalized ocean color signal for a large range of observation geometries, wavelengths, and suspended particle concentrations. Thus, PPR has great potential for improving the ocean color signal detection from satellite.

  4. Retrospective radiation dosimetry using OSL of electronic components: Results of an inter-laboratory comparison

    International Nuclear Information System (INIS)

    Bassinet, C.; Woda, C.; Bortolin, E.; Della Monaca, S.; Fattibene, P.; Quattrini, M.C.; Bulanek, B.; Ekendahl, D.; Burbidge, C.I.; Cauwels, V.; Kouroukla, E.; Geber-Bergstrand, T.; Mrozik, A.; Marczewska, B.; Bilski, P.; Sholom, S.; McKeever, S.W.S.; Smith, R.W.; Veronese, I.

    2014-01-01

    In the framework of the EU-FP7 MULTIBIODOSE project, two protocols using OSL of resistors removed from the circuit board of mobile phones were developed with the aim to use the resistors as fortuitous dosimeters in the event of a large scale radiological accident. This paper presents the results of an inter-laboratory comparison carried out under the umbrella of EURADOS. The two aims of this exercise were the validation of the MULTIBIODOSE protocols by a large number of laboratories and the dissemination of the method with the objective of preparing the basis for a network that could increase Europe's response capacity in the case of a mass casualty radiological emergency. Twelve institutes from eleven European countries and one institute from the USA, with various degrees of expertise in OSL dosimetry, took part in the OSL inter-laboratory comparison. Generally, a good agreement within uncertainties was observed between estimated and nominal doses. - Highlights: • Resistors in mobile phones could function as reliable fortuitous dosimeters in case of a large scale radiological accident. • Two OSL protocols were validated by an inter-laboratory comparison. • It is feasible to set up a network of laboratories so as to increase the measurement capacity

  5. Stanford Synchrotron Radiation Laboratory 1991 activity report. Facility developments January 1991--March 1992

    International Nuclear Information System (INIS)

    Cantwell, K.; St. Pierre, M.

    1992-01-01

    SSRL is a national facility supported primarily by the Department of Energy for the utilization of synchrotron radiation for basic and applied research in the natural sciences and engineering. It is a user-oriented facility which welcomes proposals for experiments from all researchers. The synchrotron radiation is produced by the 3.5 GeV storage ring, SPEAR, located at the Stanford Linear Accelerator Center (SLAC). SPEAR is a fully dedicated synchrotron radiation facility which operates for user experiments 7 to 9 months per year. SSRL currently has 24 experimental stations on the SPEAR storage ring. There are 145 active proposals for experimental work from 81 institutions involving approximately 500 scientists. There is normally no charge for use of beam time by experimenters. This report summarizes the activity at SSRL for the period January 1, 1991 to December 31, 1991 for research. Facility development through March 1992 is included

  6. Stanford Synchrotron Radiation Laboratory 1991 activity report. Facility developments January 1991--March 1992

    Energy Technology Data Exchange (ETDEWEB)

    Cantwell, K.; St. Pierre, M. [eds.

    1992-12-31

    SSRL is a national facility supported primarily by the Department of Energy for the utilization of synchrotron radiation for basic and applied research in the natural sciences and engineering. It is a user-oriented facility which welcomes proposals for experiments from all researchers. The synchrotron radiation is produced by the 3.5 GeV storage ring, SPEAR, located at the Stanford Linear Accelerator Center (SLAC). SPEAR is a fully dedicated synchrotron radiation facility which operates for user experiments 7 to 9 months per year. SSRL currently has 24 experimental stations on the SPEAR storage ring. There are 145 active proposals for experimental work from 81 institutions involving approximately 500 scientists. There is normally no charge for use of beam time by experimenters. This report summarizes the activity at SSRL for the period January 1, 1991 to December 31, 1991 for research. Facility development through March 1992 is included.

  7. Non-ionizing radiation protection training manual for radiation control. Lectures, demonstrations, laboratories and tours on the course on non-ionizing radiations. Final report

    International Nuclear Information System (INIS)

    Morgan, K.Z.; Burkhart, R.L.

    1976-03-01

    In late 1974, consultation with the National Training Coordination Committee of the Conference of Radiation Control Program Directors determined that State personnel needed training in order to fulfill their responsibility with respect to the growing number of non-ionizing radiation sources. A contract was awarded to the Georgia Institute of Technology to develop materials for a training program on non-ionizing radiation protection, pilot test these materials in a two-week presentation for Federal, State, and local government health personnel, and revise the materials as needed to produce a self-contained training manual. The materials were pilot-tested in March 1976, and then revised to provide the final manual. The course consists of three parts (1) general discussions of basic principles, properties, propagation and behavior of all types of non-ionizing radiations (2) an indepth study of all types and applications of coherent (laser) radiations, and (3) a study of ultraviolet, infrared, microwave, r.f., longwave and mechanical radiations as they may be used to have applications in hospitals and other medical institutions

  8. Radiation protection - Performance criteria for service laboratories performing biological dosimetry by cytogenetics

    International Nuclear Information System (INIS)

    2004-01-01

    This International Standard provides criteria for quality assurance and quality control, evaluation of the performance and the accreditation of biological dosimetry by cytogenetic service laboratories. This International Standard addresses: a) the confidentiality of personal information, for the customer and the service laboratory, b) the laboratory safety requirements, c) the calibration sources and calibration dose ranges useful for establishing the reference dose-effect curves allowing the dose estimation from chromosome aberration frequency, and the minimum detection levels, d) the scoring procedure for unstable chromosome aberrations used for biological dosimetry, e) the criteria for converting a measured aberration frequency into an estimate of absorbed dose, f) the reporting of results, g) the quality assurance and quality control, h) informative annexes containing examples of a questionnaire, instructions for customers, a data sheet for recording aberrations and a sample report

  9. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, 22. April 1, 1988 - March 31, 1989

    International Nuclear Information System (INIS)

    1991-03-01

    This report describes research activities of Osaka Laboratory for Radiation Chemistry, JAERI during one year period from April 1, 1988 through March 31, 1989. The latest report, for 1987, is JAERI-M 90-054. Detailed descriptions of the activities are presented in the following subjects : (i) studies on laser-induced organic chemical reactions and (ii) studies on radiation chemistry of high polymers and radiation dosimetry. (J.P.N.)

  10. Laboratory studies of radiation-induced sterility on the onion maggot, delia antiqua (diptera: anthomyiidae)

    International Nuclear Information System (INIS)

    McEwen, F.L.; Ritchey, G.; Liu, H.J.

    1984-01-01

    A dose of 4 krad was the most appropriate for sterilizing pupae of Delia antiqua (Meigen) for field release: adult emergence was not reduced, emerging female flies were sterile, and the eggs produced by normal females which had mated with males irradiated as pupae had a lower hatch than those resulting from matings with normal males. Males irradiated as 6- to 8-day-old pupae were fully competitive under laboratory conditions. Continuous scrutiny of laboratory cultures to detect reduction in adult emergence or reduced competitiveness of males is stressed

  11. NREL's Solar Radiation Research Laboratory Offers a Mesa-Top Home for

    Science.gov (United States)

    bad, it makes no sense at all." Several dozen people work outside with solar radiation interest in finding ways to measure solar irradiance, so too has climate science taken on urgency. Climate their visit because Boulder is so close to Golden, there was a sense of purpose based on experience

  12. 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)

  13. Laboratory methods used for testing the effect of radiation sterilization and preservation procedures on bone allografts

    International Nuclear Information System (INIS)

    Dziedzic-Goclawska, A.

    1999-01-01

    Sterilization of tissue allografts with ionizing radiation introduced in the mid of 1950s is more and more frequently used in tissue banking practice. The dose of 25 kGy is currently recommended and commonly used by many tissue banks in the world with the exception of the Central Tissue Bank in Warsaw where the dose of 33 kGy + 10 % has been routinely used since 1963, and from 1997 the dose of 35 kGy + 10 % has been introduced. To study the effect of radiation-sterilization on bone allografts the interdisciplinary investigations have been undertaken and several techniques have been implemented in our tissue bank. The electron paramagnetic resonance (EPR) spectroscopy has been applied to investigate the amount, origin and stability of free radicals and other paramagnetic entities induced in radiation-sterilized bone allografts. This technique has been also utilized for quantitative evaluation of remodeling process of radiation-sterilized bone allografts and for estimation of the absorbed dose of ionizing radiation using bone tissue as a dosimeter. A model of heterotopically induced osteogenesis after transplantation of devitalized bone matrix into the muscle (described by Urist in 1965) is very useful in tissue banking practice. It allows one to determine the contribution the graft itself makes to osteogenesis. This model is routinely used in our tissue bank to evaluate the effect of various sterilization and preservation procedures on osteoinductive properties of bone allografts. The solubility in vitro of collagen - a carrier for bone morphogenetic proteins (BMPS) and a major constituent of bone and the other connective tissue grafts, has been studied by measuring the amount of extracted neutral, acid and total soluble collagen from bone grafts preserved by different methods at irradiated at vanous experimental conditions. A positive correlation between collagen solubility in vitro and the rate of graft resorption in vivo has been observed. The high doses of

  14. (Re)implantation of quality system of LCR (Laboratory for Radiation Sciences) for accreditation in the standard ABNT NBR ISO/IEC 17025:2005

    International Nuclear Information System (INIS)

    Leite, Sandro P.; Fernandes, Elisabeth O.; David, Mariano G.; Pires, Evandro J.; Alves, Carlos F.E.; Almeida, Carlos E.

    2014-01-01

    This paper presents preparing procedure of the metrology laboratory (LABMETRO), which belongs Laboratorio de Ciencias Radiologicas of Rio de Janeiro , for postulating accreditation of its services metrology to INMETRO. This process, supported by the Technological Services Network SIBRATEC/FINEP for Radiation Protection and Dosimetry Technological Services, had as one of its aims to avoid possible technical barriers to the purchase services in the area of ionizing radiation laboratories. Accreditation will also enable the integration of services such laboratories in Brazilian Calibration Network (RBC). (author)

  15. Annual report of the Osaka Laboratory for Radiation Chemistry, Japan Atomic Energy Research Institute, No. 29. April 1, 1995 - March 31, 1996

    International Nuclear Information System (INIS)

    1997-03-01

    The annual research activities of the Osaka Laboratory for Radiation Chemistry, JAERI, during the fiscal year 1995, are reported. The research activities were conducted under two research programs: the study on laser-induced organic chemical reactions and the study on basic radiation technology for functional materials. Detailed description of the activities are presented as reviews on the following subjects: laser-induced chemical transformation, laser-induced reaction of polymer surface, photochemical separation of stable isotopes, microprocessing by radiation-induced polymerization, preparation of fine metal particles by gamma-ray irradiation, and electron beam dosimetry. The operation report of the irradiation facility is also included. In October 1995, the Osaka Laboratory was dissolved into the Kansai Research Establishment which was newly inaugurated to promote advanced photon research. Therefore, this is the final issue of the annual report of the Osaka Laboratory for Radiation Chemistry. (author)

  16. Radiation protection in an interventional laboratory: a comparative study of Australian and Saudi Arabian hospitals

    International Nuclear Information System (INIS)

    Alahmari, Mohammed Ali S.; Sun, Zhonghua; Bartlett, Andrew

    2016-01-01

    This study aimed to investigate whether the use of protection devices and attitudes of interventional professionals (including radiologists, cardiologists, vascular surgeons, medical imaging technicians and nurses) towards radiation protection will differ between Saudi Arabian and Australian hospitals. Hard copies of an anonymous survey were distributed to 10 and 6 clinical departments in the Eastern province of Saudi Arabia and metropolitan hospitals in Western Australia, respectively. The overall response rate was 43 % comprising 110 Australian participants and 63 % comprising 147 Saudi participants. Analysis showed that Australian respondents differed significantly from Saudi respondents with respect to their usages of leaded glasses (p < 0.001), ceiling-suspended lead screen (p < 0.001) and lead drape suspended from the table (p < 0.001). This study indicates that the trained interventional professionals in Australia tend to adhere to benefit from having an array of tools for personal radiation protection than the corresponding group in Saudi Arabia. (authors)

  17. Radiation protection in cyclotron and radioisotope production laboratories of IEN - (Instituto de Engenharia Nuclear - CNEN)

    International Nuclear Information System (INIS)

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

    1988-01-01

    The Cyclotron at Instituto de Engenharia Nuclear is used for the radioisotope production, neutron production and irradiation damages analysis, etc. The risks associated with the operation and maintenance of cyclotron and the neutron radiation of wide energy spectrum, external and internal contamination. A summary of the radioprotection program for these areas are show and the results obtained from the air and surface analysis, liquid efluents and equivalentes doses of workers of the several activities are given. (Author) [pt

  18. The creation of radiation dominated plasmas using laboratory extreme ultra-violet lasers

    Science.gov (United States)

    Tallents, G. J.; Wilson, S.; West, A.; Aslanyan, V.; Lolley, J.; Rossall, A. K.

    2017-06-01

    Ionization in experiments where solid targets are irradiated by high irradiance extreme ultra-violet (EUV) lasers is examined. Free electron degeneracy effects on ionization in the presence of a high EUV flux of radiation is shown to be important. Overlap of the physics of such plasmas with plasma material under compression in indirect inertial fusion is explored. The design of the focusing optics needed to achieve high irradiance (up to 1014 Wcm-2) using an EUV capillary laser is presented.

  19. Advances in absorbed dose measurement standards at the australian radiation laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Boas, J.F.; Hargrave, N.J.; Huntley, R.B.; Kotler, L.H.; Webb, D.V.; Wise, K.N. [Australian Radiation Laboratory, Yallambie, VIC (Australia)

    1996-12-31

    The applications of ionising radiation in the medical and industrial fields require both an accurate knowledge of the amount of ionising radiation absorbed by the medium in question and the capability of relating this to National and International standards. The most useful measure of the amount of radiation is the absorbed dose which is defined as the energy absorbed per unit mass. For radiotherapy, the reference medium is water, even though the measurement of the absorbed dose to water is not straightforward. Two methods are commonly used to provide calibrations in absorbed dose to water. The first is the calibration of the chamber in terms of exposure in a Cobalt-60 beam, followed by the conversion by a protocol into dose to water in this and higher energy beams. The other route is via the use of a graphite calorimeter as a primary standard device, where the conversion from absorbed dose to graphite to absorbed dose in water is performed either by theoretical means making use of cavity ionisation theory, or by experiment where the graphite calorimeter and secondary standard ionisation chamber are placed at scaled distances from the source of the radiation beam (known as the Dose-Ratio method). Extensive measurements have been made at Cobalt-60 at ARL using both the exposure and absorbed dose to graphite routes. Agreement between the ARL measurements and those based on standards maintained by ANSTO and NPL is within {+-} 0.3%. Absorbed dose measurements have also been performed at ARL with photon beams of nominal energy 16 and 19 MeV obtained from the ARL linac. The validity of the protocols at high photon energies, the validity of the methods used to convert from absorbed dose in graphite to absorbed dose in water and the validity of the indices used to specify the beams are discussed. Brief mention will also be made of the establishment of a calibration facility for neutron monitors at ARL and of progress in the development of ERP dosimetry.

  20. The effect of X-radiation on a laboratory population of Drosophila melanogaster

    International Nuclear Information System (INIS)

    Sushzhenko, O.V.; Evdokimov, E.V.; Plekhanov, G.F.

    1985-01-01

    A study was made of the effect of X radiation in doses of 13 to 416 mC/kg on a Dr. melanogaster population heterogenous in fertility. In the case of weak effects (13 and 26 mC/kg) the responses were diverse which was attributed to genetic differences between individuals of a population. With strong effects, the response of the population was identical

  1. RADIATION PROTECTION FOR THE RELATIVISTIC HEAVY ION-COLLIDER AT THE BROOKHAVEN NATIONAL LABORATORY

    International Nuclear Information System (INIS)

    Musolino, S.V.; Stevens, A.J.

    1999-01-01

    The Relativistic Heavy Ion Collider (RHIC) is a high energy particle accelerator built to study basic nuclear physics. It consists of two counter-rotating beams of fully stripped gold ions that are accelerated in two rings to an energy of 100 GeV/nucleon. The rings consist of a circular lattice of superconducting magnets 3.8 km in circumference. The beams can be stored for a period of five to ten hours and brought into collision for experiments during that time. The first major physics objective when the facility goes into operation is to recreate a state of matter, the quark-gluon plasma, that has been predicted to have existed at a short time after the creation of the universe. There are only a few other high energy particle accelerators like RHIC in the world. The rules promulgated in the Code of Federal Regulations under the Atomic Energy Act do not cover prompt radiation from accelerators, nor are there any State regulations that govern the design and operation of a superconducting collider. Special design criteria for prompt radiation were developed to provide guidance for the design of radiation shielding

  2. The laboratory-type data input and processing subsystem of the country-wide environmental radiation monitoring system in Hungary

    International Nuclear Information System (INIS)

    Kanyar, B.; Fulop, N.; Glavatszkih, N.; Nemeth, A.

    1996-01-01

    The countrywide radiation monitoring activity in Hungary is shared among the national networks as agriculture, environmental protection and public health ones. They are mostly involved in the environmental sampling and laboratory type determinations of the radioactive pollution, meanwhile the organisations mainly from the Army and Civil Defence are responsible to the early warning system. A moderately effective collaboration is established only around the Nuclear Power Plant Paks. Based on more than 10 years experience in collaboration around the NPP the Hungarian Atomic Energy Commission initiated some centralism in the countrywide monitoring activity as well. As the first step the National Research Institute for Radiobiology and Radiohygiene has been charged to establish an Information Center for laboratory-type data collection, processing, analysis and informing regularly the proper organizations on the results. The Information Centre is equipped with a computer type of SUN SPARCserver-20 and the laboratories are planned to be linked on line by PC stations. The main user programs for data collection, control and restricted processing are written in INGRES data manager software. The semiprocessed results can be transformed in a readable form for general statistical etc. packages

  3. Exercise for laboratory comparison of calibration coefficient in {sup 137}Cs beam, radiation protection - 2013/2014; Exercicio de comparacao laboratorial do coeficiente de calibracao em feixe de Cesio-137, radioprotecao - 2013/2014

    Energy Technology Data Exchange (ETDEWEB)

    Cabral, T.S. [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Potiens, M.P.A., E-mail: tschirn@ird.gov.br [Instituto de Pesquisas Energeticas e Nucleres (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Soares, C.M.A. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil); Silveira, R.R. [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil); Khoury, H. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Departamento de Energia Nuclear; Fernandes, E. [Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ (Brazil). Laboratorio de Ciencias Radiologicas; Cardoso, W.F. [Eletrobras Termonuclear S.A. (Eletronuclear), Rio de Janeiro, RJ (Brazil); Borges, J.C. [MRA Comercio de Instrumentos Eletronicos Ltda., Ribeirao Preto, SP (Brazil)

    2015-07-01

    This work deals with the preliminary results of the second exercise of comparing the radiation monitors calibration laboratories in Brazil. The exercise involved eight laboratories and the measured quantity is the air kerma in a beam of {sup 137}Cs for radioprotection. The exercise was conducted by the LNMRI/IRD, in a star shaped arrangement from October 2013 to July 2015. The largest deviation was 2% of the calibration coefficient that is acceptable for applications in radioprotection. (author)

  4. DOSIS & DOSIS 3D: radiation measurements with the DOSTEL instruments onboard the Columbus Laboratory of the ISS in the years 2009–2016

    Directory of Open Access Journals (Sweden)

    Berger Thomas

    2017-01-01

    Full Text Available The natural radiation environment in Low Earth Orbit (LEO differs significantly in composition and energy from that found on Earth. The space radiation field consists of high energetic protons and heavier ions from Galactic Cosmic Radiation (GCR, as well as of protons and electrons trapped in the Earth’s radiation belts (Van Allen belts. Protons and some heavier particles ejected in occasional Solar Particle Events (SPEs might in addition contribute to the radiation exposure in LEO. All sources of radiation are modulated by the solar cycle. During solar maximum conditions SPEs occur more frequently with higher particle intensities. Since the radiation exposure in LEO exceeds exposure limits for radiation workers on Earth, the radiation exposure in space has been recognized as a main health concern for humans in space missions from the beginning of the space age on. Monitoring of the radiation environment is therefore an inevitable task in human spaceflight. Since mission profiles are always different and each spacecraft provides different shielding distributions, modifying the radiation environment measurements needs to be done for each mission. The experiments “Dose Distribution within the ISS (DOSIS” (2009–2011 and “Dose Distribution within the ISS 3D (DOSIS 3D” (2012–onwards onboard the Columbus Laboratory of the International Space Station (ISS use a detector suite consisting of two silicon detector telescopes (DOSimetry TELescope = DOSTEL and passive radiation detector packages (PDP and are designed for the determination of the temporal and spatial variation of the radiation environment. With the DOSTEL instruments’ changes of the radiation composition and the related exposure levels in dependence of the solar cycle, the altitude of the ISS and the influence of attitude changes of the ISS during Space Shuttle dockings inside the Columbus Laboratory have been monitored. The absorbed doses measured at the end of May 2016

  5. DOSIS & DOSIS 3D: radiation measurements with the DOSTEL instruments onboard the Columbus Laboratory of the ISS in the years 2009-2016

    Science.gov (United States)

    Berger, Thomas; Burmeister, Sönke; Matthiä, Daniel; Przybyla, Bartos; Reitz, Günther; Bilski, Pawel; Hajek, Michael; Sihver, Lembit; Szabo, Julianna; Ambrozova, Iva; Vanhavere, Filip; Gaza, Ramona; Semones, Edward; Yukihara, Eduardo G.; Benton, Eric R.; Uchihori, Yukio; Kodaira, Satoshi; Kitamura, Hisashi; Boehme, Matthias

    2017-03-01

    The natural radiation environment in Low Earth Orbit (LEO) differs significantly in composition and energy from that found on Earth. The space radiation field consists of high energetic protons and heavier ions from Galactic Cosmic Radiation (GCR), as well as of protons and electrons trapped in the Earth's radiation belts (Van Allen belts). Protons and some heavier particles ejected in occasional Solar Particle Events (SPEs) might in addition contribute to the radiation exposure in LEO. All sources of radiation are modulated by the solar cycle. During solar maximum conditions SPEs occur more frequently with higher particle intensities. Since the radiation exposure in LEO exceeds exposure limits for radiation workers on Earth, the radiation exposure in space has been recognized as a main health concern for humans in space missions from the beginning of the space age on. Monitoring of the radiation environment is therefore an inevitable task in human spaceflight. Since mission profiles are always different and each spacecraft provides different shielding distributions, modifying the radiation environment measurements needs to be done for each mission. The experiments "Dose Distribution within the ISS (DOSIS)" (2009-2011) and "Dose Distribution within the ISS 3D (DOSIS 3D)" (2012-onwards) onboard the Columbus Laboratory of the International Space Station (ISS) use a detector suite consisting of two silicon detector telescopes (DOSimetry TELescope = DOSTEL) and passive radiation detector packages (PDP) and are designed for the determination of the temporal and spatial variation of the radiation environment. With the DOSTEL instruments' changes of the radiation composition and the related exposure levels in dependence of the solar cycle, the altitude of the ISS and the influence of attitude changes of the ISS during Space Shuttle dockings inside the Columbus Laboratory have been monitored. The absorbed doses measured at the end of May 2016 reached up to 286

  6. Beta-Carotene production enhancement by UV-A radiation in Dunaliella bardawil cultivated in laboratory reactors

    International Nuclear Information System (INIS)

    Mogedas, B.; Casal, C.; Forjan, E.; Vilchez, C.

    2009-01-01

    beta-Carotene is an antioxidant molecule of commercial value that can be naturally produced by certain microalgae that mostly belong to the genus Dunaliella. So far, nitrogen starvation has been the most efficient condition for enhancing beta-carotene accumulation in Dunaliella. However, while nitrogen starvation promotes beta-carotene accumulation, the cells become non-viable; consequently under such conditions, continuous beta-carotene production is limited to less than 1 week. In this study, the use of UV-A radiation as a tool to enhance long-term beta-carotene production in Dunaliella bardawil cultures was investigated. The effect of UV-A radiation (320-400 nm) added to photosynthetically active radiation (PAR, 400-700 nm) on growth and carotenoid accumulation of D. bardawil in a laboratory air-fluidized bed photobioreactor was studied. The results were compared with those from D. bardawil control cultures incubated with PAR only. The addition of 8.7 W/square m UV-A radiation to 250 W/square m PAR stimulated long-term growth of D. bardawil. Throughout the exponential growth period the UV-A irradiated cultures showed enhanced carotenoid accumulation, mostly as beta-carotene. After 24 days, the concentration of beta-carotene in UV-A irradiated cultures was approximately two times that of control cultures. Analysis revealed that UV-A clearly induced major accumulation of all-trans beta-carotene. In N-starved culture media, beta-carotene biosynthesis in UV-A irradiated cultures was stimulated. We conclude that the addition of UV-A to PAR enhances carotenoid production processes, specifically all-trans beta-carotene, in D. bardawil cells without negative effects on cell growth

  7. Advances in absorbed dose measurement standards at the australian radiation laboratory

    International Nuclear Information System (INIS)

    Boas, J.F.; Hargrave, N.J.; Huntley, R.B.; Kotler, L.H.; Webb, D.V.; Wise, K.N.

    1996-01-01

    The applications of ionising radiation in the medical and industrial fields require both an accurate knowledge of the amount of ionising radiation absorbed by the medium in question and the capability of relating this to National and International standards. The most useful measure of the amount of radiation is the absorbed dose which is defined as the energy absorbed per unit mass. For radiotherapy, the reference medium is water, even though the measurement of the absorbed dose to water is not straightforward. Two methods are commonly used to provide calibrations in absorbed dose to water. The first is the calibration of the chamber in terms of exposure in a Cobalt-60 beam, followed by the conversion by a protocol into dose to water in this and higher energy beams. The other route is via the use of a graphite calorimeter as a primary standard device, where the conversion from absorbed dose to graphite to absorbed dose in water is performed either by theoretical means making use of cavity ionisation theory, or by experiment where the graphite calorimeter and secondary standard ionisation chamber are placed at scaled distances from the source of the radiation beam (known as the Dose-Ratio method). Extensive measurements have been made at Cobalt-60 at ARL using both the exposure and absorbed dose to graphite routes. Agreement between the ARL measurements and those based on standards maintained by ANSTO and NPL is within ± 0.3%. Absorbed dose measurements have also been performed at ARL with photon beams of nominal energy 16 and 19 MeV obtained from the ARL linac. The validity of the protocols at high photon energies, the validity of the methods used to convert from absorbed dose in graphite to absorbed dose in water and the validity of the indices used to specify the beams are discussed. Brief mention will also be made of the establishment of a calibration facility for neutron monitors at ARL and of progress in the development of ERP dosimetry

  8. The whole body counting laboratory of the Swedish Radiation Safety Authority; Straalsaekerhetsmyndighetens helkroppslaboratorium

    Energy Technology Data Exchange (ETDEWEB)

    del Risco Norrlid, Lilian; Oestergren, Inger

    2010-03-15

    One of the first whole body counting (WBC) facilities in the world sensitive enough for in vivo measurements was started by Rolf Sievert 1950 at the Radio-Physics Department at Karolinska Institute in Stockholm. During many years this was the WBC facility of the national regulatory authority and went through different modernisations along the years. During 2004-2007 the facility was rebuilt in its new location in Solna strand and the laboratory thus moved. The latter detectors, sodium iodide (NaI) scintillation detectors from the late 80's and most electronic were kept. The measurement geometry and the background conditions have changed. This report describes the new facility's characteristics and presents the results for a first round of measurements on a non-contaminated group of persons for control of Cs-137 and K-40. The background in the new facility was monitored during 2007-2009 and is stable but higher than in the former location. The cause for the higher background is related to the presence of Radon progeny in the laboratory environment due to a different ventilation system. The limits of detection are 22 Bq for Cs-137 and 300 Bq for K-40, this for a half an hour measurement of a person of 75 kg weight. Measurements were run on a control group of persons to determine the activity concentrations of Cs-137 and K-40. The control group was populated with persons who had taken part in previous control groups at the former location. The purpose was to compare the activity concentrations of K-40 at the new laboratory in Solna strand and the former laboratory at Karolinska, since it is well known that the concentration of K-40 doesn't change significantly for the same person. The comparison revealed an underestimation of K-40 for most of the cases. A correction to the activities of Cs-137 and K-40 was applied for each member of the group. The correction factor is based on the theoretical estimation of K-40, which depends on the particular length

  9. Radiation hormesis in potatoes (Solanum tuberosum L.) part 1: Laboratory research

    International Nuclear Information System (INIS)

    Wiendl, F.M.; Arthur, V.; Wiendl, J.A.

    1995-01-01

    This paper describes the results of irradiation of potato (Solanum tuberosum L.) tubers of two varieties. Bintje and Baraka, with gamma radiations of Cobalt-60 at a dose of: 0.0. 2.5. 5.0 and 7.5 Gy, at the dose rate of 150 Gy per hour. Twenty eight potatoes of each variety were irradiated with each dose. Half of these potatoes were planted individually into aluminium cages of about 15 X 10 X 3 cm, using circa 120 ml of vermiculite in each cage, immediately after radiation. After seven days the rest of the potatoes was planted under the same conditions. The whole experiment was conducted into a chamber under dark conditions and temperature between 23 and 27 centigrade. Almost every two or three days each potato received circa 50 ml of plain water. After 143 to 154 days of irradiation the experiment was finished, and the following parameter were determined. Weight of potatoes without sprouts or roots; number of the eyes on which occurred sprouting; length of the longest sprout of its respective eye; humid weight of the sprouts; dry weight of the sprouts; humid weight of the roots; dry weight of the roots. (author). 19 refs, 2 tabs

  10. The Advanced Photon Source: A national synchrotron radiation research facility at Argonne National Laboratory

    International Nuclear Information System (INIS)

    1995-10-01

    The vision of the APS sprang from prospective users, whose unflagging support the project has enjoyed throughout the decade it has taken to make this facility a reality. Perhaps the most extraordinary aspect of synchrotron radiation research, is the extensive and diverse scientific makeup of the user community. From this primordial soup of scientists exchanging ideas and information, come the collaborative and interdisciplinary accomplishments that no individual alone could produce. So, unlike the solitary Roentgen, scientists are engaged in a collective and dynamic enterprise with the potential to see and understand the structures of the most complex materials that nature or man can produce--and which underlie virtually all modern technologies. This booklet provides scientists and laymen alike with a sense of both the extraordinary history of x-rays and the knowledge they have produced, as well as the potential for future discovery contained in the APS--a source a million million times brighter than the Roentgen tube

  11. The Advanced Photon Source: A national synchrotron radiation research facility at Argonne National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-10-01

    The vision of the APS sprang from prospective users, whose unflagging support the project has enjoyed throughout the decade it has taken to make this facility a reality. Perhaps the most extraordinary aspect of synchrotron radiation research, is the extensive and diverse scientific makeup of the user community. From this primordial soup of scientists exchanging ideas and information, come the collaborative and interdisciplinary accomplishments that no individual alone could produce. So, unlike the solitary Roentgen, scientists are engaged in a collective and dynamic enterprise with the potential to see and understand the structures of the most complex materials that nature or man can produce--and which underlie virtually all modern technologies. This booklet provides scientists and laymen alike with a sense of both the extraordinary history of x-rays and the knowledge they have produced, as well as the potential for future discovery contained in the APS--a source a million million times brighter than the Roentgen tube.

  12. Hydrogel wound dressing preparation at the laboratory scale by using electron beam and gamma radiation

    International Nuclear Information System (INIS)

    Rapado Raneque, Manuel; Rodriguez Rodriguez, Alejandro; Peniche Covas, Carlos

    2013-01-01

    The present work describes the preparation of hydrogel based on cross-linked networks of poly (N-vinylpirrolidone), PVP, with polyethyleneglicol and agar with 90% water and PVP nancomposites with a synthetic nanoclay, Laponite XLG, for use as burn dressings. These systems were obtained in two ways: using gamma Co-60 and electron beam radiation. The gelation obtained dose was D g = 1.72 kGy. The elastic modulus of hydrogel was independent of the method of irradiation. It was 0.39 MPa for the hydrogel irradiated with gamma Co-60 and 0.38 MPa for electron beam irradiation. The elastic modulus of the nanocomposite membrane was 1.25 MPa, three times higher. These results indicate that the PVP/Laponite XLG nanocomposite hydrogel membrane is the best choice for wound dressing applications due to its high water sorption capacity and its superior mechanical properties.

  13. A survey of the radiation exposures received by the staff at two cardiac catheterization laboratories

    Energy Technology Data Exchange (ETDEWEB)

    McParland, B J [Cancer Control Agency of British Columbia, Victoria Cancer Clinic (Canada); Nosil, J; Burry, B [Victoria General Hospital (Canada)

    1990-11-01

    A study was made of exposures received by cardiologists and nurses working in two catheterization laboratories (Royal Jubilee Hospital, Victoria B.C. and the Victoria General Hospital), at various anatomical locations. One lab. performed primarily diagnostic procedures, the other international procedures. Results were used to assess the efficacy of personal shielding and to identify procedures followed by staff which elevated exposures. Data were also used to calculate estimates of upper limits of annual effective whole-body dose equivalent, H{sub E}, ranging from 13-19 mSv/yr for staff at both labs. Although these values are lower than the maximum of 50 mSv/yr, they are still significant and procedural modifications were made. Only nurses' eyes were estimated to receive annual dose equivalents approaching maximum and nurses now wear eye protection. (author).

  14. Radiation

    International Nuclear Information System (INIS)

    2013-01-01

    The chapter one presents the composition of matter and atomic theory; matter structure; transitions; origin of radiation; radioactivity; nuclear radiation; interactions in decay processes; radiation produced by the interaction of radiation with matter

  15. Laboratory Tests

    Science.gov (United States)

    ... Medical Devices Radiation-Emitting Products Vaccines, Blood & Biologics Animal & ... What are lab tests? Laboratory tests are medical devices that are intended for use on samples of blood, urine, or other tissues ...

  16. Electron/positron measurements obtained with the Mars Science Laboratory Radiation Assessment Detector on the surface of Mars

    Directory of Open Access Journals (Sweden)

    J. Köhler

    2016-01-01

    Full Text Available The Radiation Assessment Detector (RAD, on board the Mars Science Laboratory (MSL rover Curiosity, measures the energetic charged and neutral particles and the radiation dose rate on the surface of Mars. Although charged and neutral particle spectra have been investigated in detail, the electron and positron spectra have not been investigated yet. The reason for that is that they are difficult to separate from each other and because of the technical challenges involved in extracting energy spectra from the raw data. We use GEANT4 to model the behavior of the RAD instrument for electron/positron measurements. We compare Planetocosmics predictions for different atmospheric pressures and different modulation parameters Φ with the obtained RAD electron/positron measurements. We find that the RAD electron/positron measurements agree well with the spectra predicted by Planetocosmics. Both RAD measurements and Planetocosmics simulation show a dependence of the electron/positron fluxes on both atmospheric pressure and solar modulation potential.

  17. Laboratory simulation of Euclid-like sky images to study the impact of CCD radiation damage on weak gravitational lensing

    Science.gov (United States)

    Prod'homme, T.; Verhoeve, P.; Oosterbroek, T.; Boudin, N.; Short, A.; Kohley, R.

    2014-07-01

    Euclid is the ESA mission to map the geometry of the dark universe. It uses weak gravitational lensing, which requires the accurate measurement of galaxy shapes over a large area in the sky. Radiation damage in the 36 Charge-Coupled Devices (CCDs) composing the Euclid visible imager focal plane has already been identified as a major contributor to the weak-lensing error budget; radiation-induced charge transfer inefficiency (CTI) distorts the galaxy images and introduces a bias in the galaxy shape measurement. We designed a laboratory experiment to project Euclid-like sky images onto an irradiated Euclid CCD. In this way - and for the first time - we are able to directly assess the effect of CTI on the Euclid weak-lensing measurement free of modelling uncertainties. We present here the experiment concept, setup, and first results. The results of such an experiment provide test data critical to refine models, design and test the Euclid data processing CTI mitigation scheme, and further optimize the Euclid CCD operation.

  18. [The opportunity to use combined stem cells transplantation for haemopoesis activation in the old and mature laboratory animals under the conditions of ionizing radiation].

    Science.gov (United States)

    Grebnev, D Iu; Maklakova, I Iu; Iastrebov, A P

    2014-01-01

    The objective of this work was to study the influence of combined transplantation of stem cells (multypotent mesenchimal stromal and haemopoetic stem cells) on the haemopoesis of old and mature laboratory animals under the condition of ionizing radiation. The result of the experiment shows that under physiological conditions the combined transplantation brings the erithropoesis activation, under the ionizing radiation conditions it brings the erythroid and granulocytopoesis activation. Moreover the combined MMSC and HSC transplantation gives cytoprotective action on the myeloid tissue due to decrease of cyto genically changed cells in the mature animals under the condition of ionizing radiation, but in the old animals this effect can be seen even under physiological condition. Combined transplantation of MMSC and GSC can be used in the mature and old laboratory animals under the conditions of ionising radiation for the haemopoesis activation.

  19. The Advanced Light Source: A new 1.5 GeV synchrotron radiation facility at the Lawrence Berkeley Laboratory

    International Nuclear Information System (INIS)

    Schlachter, F.

    1990-01-01

    The Advanced Light Source (ALS), presently under construction at the Lawrence Berkeley Laboratory, will be the world's brightest synchrotron-radiation source of ultraviolet and soft x-ray photons when it opens its doors to users in April 1993. The ALS is a third-generation source that is based on a low-emittance electron storage ring, optimized for operation at 1.5 GeV, with long straight sections for insertion devices. Its naturally short pulses are ideal for time-resolved measurements. Undulators will produce high-brightness beams from below 10 eV to above 2 keV; wigglers will produce high fluxes of harder x-rays to energies above 10 keV. The ALS will support an extensive research program in a broad spectrum of scientific and technological areas. The high brightness will open new areas of research in the materials sciences, such as spatially resolved spectroscopy (spectromicroscopy). Biological applications will include x-ray microscopy with element-specific sensitivity in the water window of the spectrum where water is much more transparent than protein. The ALS will be an excellent research tool for atomic physics and chemistry because the high flux will allow measurements to be made with tenuous gas-phase targets. Undulator radiation can excite the K shell of elements up to silicon and the L shell of elements up to krypton, and wiggler radiation can excite the L shell of nearly every element. The ALS will operate as a national user facility; interested scientists are encouraged to contact the ALS Scientific Program Coordinator to explore their scientific and technological research interests

  20. New developments and applications of intense pulsed radiation sources at Sandia National Laboratories

    Energy Technology Data Exchange (ETDEWEB)

    Cook, D.

    1998-02-01

    In the past thirty-six months, tremendous strides have been made in x-ray production using high-current z-pinches. Today, the x-ray energy (1.9 MJ) and power (200 TW) output of the Z accelerator (formerly PBFA-II) is the largest available in the laboratory. These z-pinch x-ray sources are being developed for research into the physics of high energy density plasmas of interest in weapon behavior and in inertial confinement fusion. Beyond the Z accelerator current of 20 MA, an extrapolation to the X-1 accelerator level of 60 MA may have the potential to drive high-yield ICF reactions at affordable cost if several challenging technical problems can be overcome. New developments have also taken place at Sandia in the area of high current, mm-diameter electron beams for advanced hydrodynamic radiography. On SABRE, x-ray spot diameters were less than 2 mm with a dose of 100 R at 1 meter in a 40 ns pulse.

  1. Automatization of the Calibration Laboratory for Radiation Monitors of the IRD

    International Nuclear Information System (INIS)

    Cabral, Tania S.; Ramos, Manoel M.O.; Quaresma, Daniel S.

    2007-01-01

    This work will present the concluded stages and also the ones that are still in process to reach the full automation of the calibration system. Little by little the laboratory included in its installations the automatization of some of its operations, aiming the safety of the staff and their equipment. The automation makes the installation almost ideal for the radioprotection, that is, makes its exposure as low as possible and the routines more accurate, minimizing attributed the uncertainties and the doses received by the professionals who operated the system manually. Currently, on the operation table there is a control of the position car exists and its speed, the internal TV circuit (of the room, the position of the car and equipment that is going to be calibrated), the control of the registration is done by the Autolab program and the Irradiator Buchler OB85 control with the sources of 137Cs and 60Co.A next stage will be the implantation of the automation project of the positioning of the three used attenuators. (author)

  2. Exposure levels to radiation in a nuclear medicine laboratory: measurements with thermoluminescence dosemeters

    International Nuclear Information System (INIS)

    Ruiz J, A.

    2000-01-01

    Since 1996 in the Nuclear medicine Department and another routine and research departments of the National Institute of Medical and Nutrition Sciences (INCMNSZ) are working at least with 12 radioactive sources opened and sealed. However, it was unknown if with the Tl personal dosemeters with lithium fluoride crystals (LiF), could be possible to receive information about the equivalent dose for each radionuclide or if there was some radionuclide that by being low energy emissor or beta energy emissor, it did not represent an ionization power sufficient to excite the crystals of the thermoluminescent dosemeters (DTL). In this work the obtained results with control dosemeters of diverse source opened or sealed are shown, which were put at 1 cm of the LiF crystals during a time exposure 18 hours. Therefore the objective of this work is to verify which sources excite or not to DTL crystals and taking the pertinent safety measures for each radionuclide. The conclusion is that the majority of dosemeters were excited by beta or gamma radiation of the radionuclides and that LiF crystals are able to receive equivalent doses until 1200 mSv, being this a guarantee for the staff, that in an any moment could be exposed to high dose in his working day. Also it was corroborated that the radionuclides more energizer are: iodine-131, iodine-125 and sodium-22 while the phosphorus-32 must be managed with careful, since the exposure to hands can result significant, just like the technetium-99m ( 99m Tc). (Author)

  3. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, (No. 28). April 1, 1994 - March 31, 1995

    International Nuclear Information System (INIS)

    1995-10-01

    The annual research activities of Osaka Laboratory for Radiation Chemistry, JAERI during the fiscal year of 1994 (April 1, 1994 - March 31, 1995) are described. The research activities were conducted under two research programs: the study on laser-induced organic chemical reactions and the study on basic radiation technology for functional materials. Detailed descriptions of the activities are presented as reviews on the following subjects: laser-induced chemical transformation, laser-induced reaction of polymer surface, microprocessing by radiation-induced polymerization, preparation of fine metal particles by gamma ray irradiation, and electron beam dosimetry. The operation report of the irradiation facilities is also included. (author)

  4. Annual report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute, (No. 28). April 1, 1994 - March 31, 1995

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-10-01

    The annual research activities of Osaka Laboratory for Radiation Chemistry, JAERI during the fiscal year of 1994 (April 1, 1994 - March 31, 1995) are described. The research activities were conducted under two research programs: the study on laser-induced organic chemical reactions and the study on basic radiation technology for functional materials. Detailed descriptions of the activities are presented as reviews on the following subjects: laser-induced chemical transformation, laser-induced reaction of polymer surface, microprocessing by radiation-induced polymerization, preparation of fine metal particles by gamma ray irradiation, and electron beam dosimetry. The operation report of the irradiation facilities is also included. (author).

  5. Review of Hybrid (Deterministic/Monte Carlo) Radiation Transport Methods, Codes, and Applications at Oak Ridge National Laboratory

    International Nuclear Information System (INIS)

    Wagner, John C.; Peplow, Douglas E.; Mosher, Scott W.; Evans, Thomas M.

    2010-01-01

    This paper provides a review of the hybrid (Monte Carlo/deterministic) radiation transport methods and codes used at the Oak Ridge National Laboratory and examples of their application for increasing the efficiency of real-world, fixed-source Monte Carlo analyses. The two principal hybrid methods are (1) Consistent Adjoint Driven Importance Sampling (CADIS) for optimization of a localized detector (tally) region (e.g., flux, dose, or reaction rate at a particular location) and (2) Forward Weighted CADIS (FW-CADIS) for optimizing distributions (e.g., mesh tallies over all or part of the problem space) or multiple localized detector regions (e.g., simultaneous optimization of two or more localized tally regions). The two methods have been implemented and automated in both the MAVRIC sequence of SCALE 6 and ADVANTG, a code that works with the MCNP code. As implemented, the methods utilize the results of approximate, fast-running 3-D discrete ordinates transport calculations (with the Denovo code) to generate consistent space- and energy-dependent source and transport (weight windows) biasing parameters. These methods and codes have been applied to many relevant and challenging problems, including calculations of PWR ex-core thermal detector response, dose rates throughout an entire PWR facility, site boundary dose from arrays of commercial spent fuel storage casks, radiation fields for criticality accident alarm system placement, and detector response for special nuclear material detection scenarios and nuclear well-logging tools. Substantial computational speed-ups, generally O(10 2-4 ), have been realized for all applications to date. This paper provides a brief review of the methods, their implementation, results of their application, and current development activities, as well as a considerable list of references for readers seeking more information about the methods and/or their applications.

  6. Review of Hybrid (Deterministic/Monte Carlo) Radiation Transport Methods, Codes, and Applications at Oak Ridge National Laboratory

    International Nuclear Information System (INIS)

    Wagner, John C.; Peplow, Douglas E.; Mosher, Scott W.; Evans, Thomas M.

    2010-01-01

    This paper provides a review of the hybrid (Monte Carlo/deterministic) radiation transport methods and codes used at the Oak Ridge National Laboratory and examples of their application for increasing the efficiency of real-world, fixed-source Monte Carlo analyses. The two principal hybrid methods are (1) Consistent Adjoint Driven Importance Sampling (CADIS) for optimization of a localized detector (tally) region (e.g., flux, dose, or reaction rate at a particular location) and (2) Forward Weighted CADIS (FW-CADIS) for optimizing distributions (e.g., mesh tallies over all or part of the problem space) or multiple localized detector regions (e.g., simultaneous optimization of two or more localized tally regions). The two methods have been implemented and automated in both the MAVRIC sequence of SCALE 6 and ADVANTG, a code that works with the MCNP code. As implemented, the methods utilize the results of approximate, fast-running 3-D discrete ordinates transport calculations (with the Denovo code) to generate consistent space- and energy-dependent source and transport (weight windows) biasing parameters. These methods and codes have been applied to many relevant and challenging problems, including calculations of PWR ex-core thermal detector response, dose rates throughout an entire PWR facility, site boundary dose from arrays of commercial spent fuel storage casks, radiation fields for criticality accident alarm system placement, and detector response for special nuclear material detection scenarios and nuclear well-logging tools. Substantial computational speed-ups, generally O(102-4), have been realized for all applications to date. This paper provides a brief review of the methods, their implementation, results of their application, and current development activities, as well as a considerable list of references for readers seeking more information about the methods and/or their applications.

  7. Review of hybrid (deterministic/Monte Carlo) radiation transport methods, codes, and applications at Oak Ridge National Laboratory

    International Nuclear Information System (INIS)

    Wagner, J.C.; Peplow, D.E.; Mosher, S.W.; Evans, T.M.

    2010-01-01

    This paper provides a review of the hybrid (Monte Carlo/deterministic) radiation transport methods and codes used at the Oak Ridge National Laboratory and examples of their application for increasing the efficiency of real-world, fixed-source Monte Carlo analyses. The two principal hybrid methods are (1) Consistent Adjoint Driven Importance Sampling (CADIS) for optimization of a localized detector (tally) region (e.g., flux, dose, or reaction rate at a particular location) and (2) Forward Weighted CADIS (FW-CADIS) for optimizing distributions (e.g., mesh tallies over all or part of the problem space) or multiple localized detector regions (e.g., simultaneous optimization of two or more localized tally regions). The two methods have been implemented and automated in both the MAVRIC sequence of SCALE 6 and ADVANTG, a code that works with the MCNP code. As implemented, the methods utilize the results of approximate, fast-running 3-D discrete ordinates transport calculations (with the Denovo code) to generate consistent space- and energy-dependent source and transport (weight windows) biasing parameters. These methods and codes have been applied to many relevant and challenging problems, including calculations of PWR ex-core thermal detector response, dose rates throughout an entire PWR facility, site boundary dose from arrays of commercial spent fuel storage casks, radiation fields for criticality accident alarm system placement, and detector response for special nuclear material detection scenarios and nuclear well-logging tools. Substantial computational speed-ups, generally O(10 2-4 ), have been realized for all applications to date. This paper provides a brief review of the methods, their implementation, results of their application, and current development activities, as well as a considerable list of references for readers seeking more information about the methods and/or their applications. (author)

  8. Design and implementation of a virtual laboratory of radiation measurement; Diseno e implementacion de un laboratorio virtual de medicion de radiaciones

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez T, J. R.; Morales S, J. B. [Facultad de Ingenieria, UNAM, Ciudad Universitaria, 04510 Mexico, D. F. (Mexico)], e-mail: jms0620@yahoo.com.mx

    2009-10-15

    The work involves the implementation of a virtual laboratory, this project is conducted in the Faculty of Engineering of National Autonomous University of Mexico with the name of LANUVI. It is intended that the laboratory can be used by students who have interest in the nuclear radiation knowledge as well as in its detection and attenuation, in addition serve as and introduction to nuclear systems. In the first part of project will conduct a source that can simulate the particle radiation of Alfa, beta, neutrons and gamma rays. The project will take sources used in class laboratories and elements that are dangerous but are used in different practical applications. After taking the source analyzing the particles behaviour in different media like air, animal tissue, aluminium, lead, etc. The analysis is done in different ways in order to know with which material can stop or mitigate the different types of radiation. Finally shall be measure radioactivity with different types of detectors. At this point, has the behaviour of ionization chamber but in the future is expected to make the simulation of some other radiation detectors. The mathematical models we represent the behaviour of these cases were implemented in free software. The program will be used to implement the virtual laboratory with radiation sources, detectors and different types of shields will be Blender which is a free software that is used by many users for the embodiment of games but try to use as a tool to help visualize the different equipment that is widely used in a radioactive materials laboratory. (Author)

  9. Evaluation of uncertainties in X radiation metrologic chain in the Secondary Standard Dosimetry Laboratory/IRD-Brazilian CNEN

    International Nuclear Information System (INIS)

    Fonseca Coelho, B.C. da.

    1987-01-01

    The equipment to measure ionizing radiation used in medicine needs appropriate technical qualifications to comply with their purposes and regular calibrations to assure the correct evaluation of associated quantities. By legal requirements, the annual calibration of users' dosemeters is to be done in a Secondary Standard Dosimetry Laboratory (SSDL), andthe SSDL'S standard dosemeters are refered to a Primary Standard Dosimetry (PSDL), establishing a rigourous metrological network. The SSDL network. The SSDL needs to maintain, regularly, a quality control program for short and Long term stability of standard dosemeters. The purpose of the work was to determine the uncertainties associated to technical procedures of X-rays calibration at the SSDL/IRD/IRD. To evaluate the influence of the nine main parameters that can give origin to uncertainties, specific procedures and methods are established, according to international requirements and recomendations. The methods are based on the comparison of the behaviour of the users' dosemeters, with a standard dosemeter in the many measuring conditions set up for the secondary standard used as a reference. The total uncertainty obtained was 1,81% usig a conservative procedure, to protect the users and patients. When needed to transfer the calibration factor and their uncertainty, the procedure used was to determine the uncertainty under the worsst possible operating conditions of the equipment, to obtain a superestimated value. This represents an excellent result for an SDDL of IAEA Network. (autor) [pt

  10. Radiative transfer modeling of dust-coated Pancam calibration target materials: Laboratory visible/near-infrared spectrogoniometry

    Science.gov (United States)

    Johnson, J. R.; Sohl-Dickstein, J.; Grundy, W.M.; Arvidson, R. E.; Bell, J.F.; Christensen, P.R.; Graff, T.; Guinness, E.A.; Kinch, K.; Morris, Robert; Shepard, M.K.

    2006-01-01

    Laboratory visible/near-infrared multispectral observations of Mars Exploration Rover Pancam calibration target materials coated with different thicknesses of Mars spectral analog dust were acquired under variable illumination geometries using the Bloomsburg University Goniometer. The data were fit with a two-layer radiative transfer model that combines a Hapke formulation for the dust with measured values of the substrate interpolated using a He-Torrance approach. We first determined the single-scattering albedo, phase function, opposition effect width, and amplitude for the dust using the entire data set (six coating thicknesses, three substrates, four wavelengths, and phase angles 3??-117??). The dust exhibited single-scattering albedo values similar to other Mars analog soils and to Mars Pathfinder dust and a dominantly forward scattering behavior whose scattering lobe became narrower at longer wavelengths. Opacity values for each dust thickness corresponded well to those predicted from the particles sizes of the Mars analog dust. We then restricted the number of substrates, dust thicknesses, and incidence angles input to the model. The results suggest that the dust properties are best characterized when using substrates whose reflectances are brighter and darker than those of the deposited dust and data that span a wide range of dust thicknesses. The model also determined the dust photometric properties relatively well despite limitations placed on the range of incidence angles. The model presented here will help determine the photometric properties of dust deposited on the MER rovers and to track the multiple episodes of dust deposition and erosion that have occurred at both landing sites. Copyright 2006 by the American Geophysical Union.

  11. Calibrations and evaluation of the quality assurance during 1999 at the National Laboratory for ionising radiation; Kalibrerings- och normalieverksamheten vid Riksmaetplats 06 under 1999

    Energy Technology Data Exchange (ETDEWEB)

    Grindborg, Jan-Erik; Israelsson, Karl-Erik; Kylloenen, Jan-Erik; Samuelson, Goeran

    2000-06-01

    The Swedish Radiation Protection Institute is the National Laboratory for the dosimetric quantities kerma, absorbed dose and dose equivalent. The activity is based on established calibration procedures and a quality assurance program for the used standards. This report gives a brief summary of the calibrations performed during 1999 and a more detailed description and analysis of the quality assurance during this year. The report makes it easier to draw conclusions about the long-term stability and possible malfunctions.

  12. A reappraisal of the reported dose equivalents at the boundary of the University of California Radiation Laboratory during the early days of Bevatron operation

    International Nuclear Information System (INIS)

    Thomas, Ralph H.; Smith, Alan R.; Zeman, Gary H.

    2000-01-01

    Accelerator-produced radiation levels at the perimeter of the Ernest Orlando Lawrence Berkeley National Laboratory (the Berkeley Laboratory) reached a maximum in 1959. Neutrons produced by the Bevatron were the dominant component of the radiation field. Radiation levels were estimated from measurements of total neutron fluence and reported in units of dose equivalent (rem). Accurate conversion from total fluence to dose equivalent demands knowledge of both the energy spectrum of accelerator-produced neutrons and the appropriate conversion coefficient functions for different irradiation geometries. At that time (circa 1960), such information was limited, and it was necessary to use judgment in the interpretation of measured data. The Health Physics Group of the Berkeley Laboratory used the best data then available and, as a matter of policy, reported the most conservative (largest) values of dose equivalent supported by their data. Since the early sixties, significant improvements in the information required to compute dose equivalent, particularly in the case of conversion coefficients, have been reported in the scientific literature. This paper reinterprets the older neutron measurements using the best conversion coefficient data available today. It is concluded that the dose equivalents reported in the early sixties would be reduced by at least a factor of two using current methods of analysis

  13. Genetically uniform strains of fish as laboratory models for experimental studies of the effects of ionizing radiation

    International Nuclear Information System (INIS)

    Woodhead, A.D.; Setlow, R.B.; Hart, R.W.

    1979-01-01

    The advantages are discussed of using a genetically uniform test animal such as the amazon molly, Poecilia formosa, to reduce the biotic variability in experimental determination of the effects of ionizing radiation on aquatic ecosystems. Besides a cost reduction from using less organisms for these radiation-effect studies, another significant advantage of the higher precision responses due to homozygous genetic material is the assessment of radiation effects at the molecular and cellular levels. (author)

  14. The role of the EPA radiation quality assurance program in the measurement quality assurance accreditation program for radioassay laboratories

    Energy Technology Data Exchange (ETDEWEB)

    Grady, T.M. [Environmental Monitoring Systems Laboratory, Las Vegas, NV (United States)

    1993-12-31

    As the nature and extent of radiological contamination becomes better documented and more public, radioanalytical laboratories are faced with a constantly expanding variety of new and difficult analytical requirements. Concurrent with those requirements is the responsibility to provide customers, regulatory officials, or the public with defensible data produced in an environment of verifiable, controlled quality. To meet that need, a quality assurance accreditation program for radioassay laboratories has been proposed by the American National Standards Institute (ANSI). The standard will provide the organizational framework and functional requirements needed to assure the quality of laboratory outputs. Under the proposed program, the U.S. Environmental Protection Agency`s (EPA`s) Laboratory Intercomparison Program plays a key role as a reference laboratory. The current and proposed roles of the EPA Intercomparison Program are discussed, as are the functional relationships between EPA, the accreditating organization, and the service and monitoring laboratories.

  15. DEVELOPMENT HISTORY OF NATURAL SOURCES DOSIMETRY LABORATORY AT THE RESEARCH INSTITUTE OF RADIATION HYGIENE AFTER PROFESSOR P.V. RAMZAEV: 1970–1986

    Directory of Open Access Journals (Sweden)

    E. P. Lisachenko

    2016-01-01

    Full Text Available At the initial development stage of the Leningrad Research Institute of Radiation Hygiene natural sources dosimetry laboratory the experts focused at establishment of equipment and methodology. The following period of the lab activity was rather related to theoretical and experimental research which finally led to creation of a new in radiation hygiene field of work on standard protection of population irradiation caused by natural sources of ionizing radiation. The article describes the main results of the laboratory research of construction materials natural radioactivity and the subsequent substantiation of specifications on natural radionuclides content in them. There was parallel research of natural radionuclides transfer in the system “fertilizers→soil→plants” and further along the nutrition chain into the human body. In these works there were first obtained the quantitative data on coefficients of natural radionuclides transfer from fertilizers into agricultural plants, data on the natural radionuclides content in phosphate fertilizers of the main manufacturers, and the reference data on the natural radioactivity of arable soils. This research provided substantiation of a standard of natural radionuclides content in phosphate fertilizers. Important results were also received in a large-scale research of natural environment radioactivity and of technological processes of production, processing and use of mineral raw materials. During this research for the first time there were obtained the tool data on irradiation levels and structure of doses of non-uranium industries enterprises’ employees and on natural radionuclides balance parameters in different technologies.For the last two years of the considered period the laboratory was practically not engaged in its primary activity – the efforts of all laboratory and the Institute experts were focused at analysis of Chernobyl NPP accident consequences, research of man

  16. Detector Characterization Report, Response Related to Linear Movement and Radiation Levels for an Oak Ridge National Laboratory (ORNL)-Developed Ion Chamber and a Commercial Ion Chamber

    International Nuclear Information System (INIS)

    Chiaro, P.J.

    2001-01-01

    Recent activities regarding the safeguarding of radioactive material have indicated there is a need to use radiation sensors to monitor intentional or unintentional material movement. Existing radiation detection systems were not typically designed for this type of operation since most of their use accounted for monitoring material while the material is stationary. To ensure that a radiation monitoring system is capable of detecting the movement of radioactive material, a series of tests were needed. These tests would need to be performed in known radiological conditions, under controlled environmental conditions, and at known movement speeds. The Radiation Effects Facility (REF), located at the Radiation Calibration Laboratory, provided the necessary capabilities to perform these tests. This report provides a compilation of the results from a characterization of two different sensors--a simple, air ionization chamber-based sensor developed at ORNL that consists of an ion chamber connected to a separate amplifier, and an Eberline model RO-7-LD. The RO-7-LD is also an air ionization chamber-based sensor, but the electronics are in the same physical package

  17. Laboratory for Structural Acoustics

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Supports experimental research where acoustic radiation, scattering, and surface vibration measurements of fluid-loaded and non-fluid-loaded structures are...

  18. New data on the effect of ionizing radiation on the growth of the aquatic plant Elodea canadensis in the laboratory.

    Science.gov (United States)

    Bolsunovsky, A Ya; Dementyev, D V; Trofimova, E A; Zotina, T A

    2017-07-01

    Toxicological experiments with radioactive bottom sediments and extrinsic γ-irradiation have demonstrated that the growth of common elodea roots is suppressed by irradiation at doses several times lower than the established threshold dose. The effect of γ-irradiation on the growth of elodea stems has not been observed at any dose used. The data obtained show that elodea could be recommended for use as an indicator of biological effects of radiation in the range of low radiation doses.

  19. Bilogical effects of ionizing radiation: epidemiological surveys and laboratory animal experiments. Implications for risk evaluation and decision processes

    International Nuclear Information System (INIS)

    Fabrikant, J.I.

    1981-04-01

    General background is given for an understanding of the potential health effects in populations exposed to low-level ionizing radiations. The discussion is within the framework of the scientific deliberations and controversies that arose during preparation of the current report of the committee on the biological effects of ionizing radiation of the National Academy of Science - National Research Council (1980 Beir-III Report)

  20. Radiations

    International Nuclear Information System (INIS)

    Pujol Mora, J.

    1999-01-01

    The exposition to ionizing radiations is a constant fact in the life of the human being and its utilization as diagnostic and therapeutic method is generalized. However, it is notorious how as years go on, the fear to the ionizing radiation seems to persist too, and this fact is not limited to the common individual, but to the technical personnel and professional personnel that labors with them same. (S. Grainger) [es

  1. Radiation

    International Nuclear Information System (INIS)

    Davidson, J.H.

    1986-01-01

    The basic facts about radiation are explained, along with some simple and natural ways of combating its ill-effects, based on ancient healing wisdom as well as the latest biochemical and technological research. Details are also given of the diet that saved thousands of lives in Nagasaki after the Atomic bomb attack. Special comment is made on the use of radiation for food processing. (U.K.)

  2. Efficacy of the RADPAD Protection Drape in Reducing Operators' Radiation Exposure in the Catheterization Laboratory: A Sham-Controlled Randomized Trial.

    Science.gov (United States)

    Vlastra, Wieneke; Delewi, Ronak; Sjauw, Krischan D; Beijk, Marcel A; Claessen, Bimmer E; Streekstra, Geert J; Bekker, Robbert J; van Hattum, Juliette C; Wykrzykowska, Joanna J; Vis, Marije M; Koch, Karel T; de Winter, Robbert J; Piek, Jan J; Henriques, José P S

    2017-11-01

    Interventional cardiologists are increasingly exposed to radiation-induced diseases like cataract and the stochastic risk of left-sided brain tumors. The RADPAD is a sterile, disposable, lead-free shield placed on the patient with the aim to minimize operator-received scatter radiation. The objective of the trial was to examine the RADPAD's efficacy in a real-world situation. In the current, double-blind, sham-controlled, all-comer trial, patients undergoing diagnostic catheterization or percutaneous coronary interventions were randomized in a 1:1:1 ratio to a radiation absorbing shield (RADPAD), standard treatment (NOPAD), or a sham shield (SHAMPAD). The sham shield allowed testing for shield-induced radiation behavior. The primary outcome was the difference in relative exposure of the primary operator between the RADPAD and NOPAD arms and was defined as the ratio between operator's exposure (E in µSv) and patient exposure (dose area product in mGy·cm 2 ), measured per procedure. A total of 766 consecutive coronary procedures were randomized to the use of RADPAD (N=255), NOPAD (N=255), or SHAMPAD (N=256). The use of RADPAD was associated with a 20% reduction in relative operator exposure compared with that of NOPAD ( P =0.01) and a 44% relative exposure reduction compared with the use of a SHAMPAD ( P RADPAD radiation shield reduced operator radiation exposure compared with procedures with NOPAD or SHAMPAD. This study supports the routine use of RADPAD in the catheterization laboratory. URL: https://www.clinicaltrials.gov. Unique identifier: NCT03139968. © 2017 American Heart Association, Inc.

  3. Radiation

    International Nuclear Information System (INIS)

    Winther, J.F.; Ulbak, K.; Dreyer, L.; Pukkala, E.; Oesterlind, A.

    1997-01-01

    Exposure to solar and ionizing radiation increases the risk for cancer in humans. Some 5% of solar radiation is within the ultraviolet spectrum and may cause both malignant melanoma and non-melanocytic skin cancer; the latter is regarded as a benign disease and is accordingly not included in our estimation of avoidable cancers. Under the assumption that the rate of occurrence of malignant melanoma of the buttocks of both men and women and of the scalp of women would apply to all parts of the body in people completely unexposed to solar radiation, it was estimated that approximately 95% of all malignant melanomas arising in the Nordic populations around the year 2000 will be due to exposure to natural ultraviolet radiation, equivalent to an annual number of about 4700 cases, with 2100 in men and 2600 in women, or some 4% of all cancers notified. Exposure to ionizing radiation in the Nordic countries occurs at an average effective dose per capita per year of about 3 mSv (Iceland, 1.1 mSv) from natural sources, and about 1 mSv from man-made sources. While the natural sources are primarily radon in indoor air, natural radionuclides in food, cosmic radiation and gamma radiation from soil and building materials, the man-made sources are dominated by the diagnostic and therapeutic use of ionizing radiation. On the basis of measured levels of radon in Nordic dwellings and associated risk estimates for lung cancer derived from well-conducted epidemiological studies, we estimated that about 180 cases of lung cancer (1% of all lung cancer cases) per year could be avoided in the Nordic countries around the year 2000 if indoor exposure to radon were eliminated, and that an additional 720 cases (6%) could be avoided annually if either radon or tobacco smoking were eliminated. Similarly, it was estimated that the exposure of the Nordic populations to natural sources of ionizing radiation other than radon and to medical sources will each give rise to an annual total of 2120

  4. Synchrotron radiation

    International Nuclear Information System (INIS)

    Helliwell, J.R.; Walker, R.P.

    1985-01-01

    A detailed account of the research work associated with the Synchrotron Radiation Source at Daresbury Laboratory, United Kingdom, in 1984/85, is presented in the Appendix to the Laboratory's Annual Report. (U.K.)

  5. Conception of the Instrument Calibration Laboratory of Ionizing Radiation Measurement (LACIMRI) of CTMSP - Sao Paulo, SP; Concepcao do Laboratorio de Calibracao de Instrumentos de Medicao de Radiacao Ionizante (LACIMRI) do CTMSP, Sao Paulo, SP

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Raimundo Dias da; Kibrit, Eduardo, E-mail: raimundo@ctmsp.mar.mil.b, E-mail: kibrit@ctmsp.mar.mil.b [Centro Tecnologico da Marinha em Sao Paulo (CTMSP), Sao Paulo, SP (Brazil)

    2009-07-01

    The present work describes the phases of implantation of calibration laboratory of ionizing radiation measurement instruments at the CTMSP, Sao Paulo, in a priory approved by CNEN, Brazil. That laboratory will allow and enhance the present metrological capacity for the attendance to the growing demand for calibration services of the instruments

  6. Effect of gamma-radiation on demographic and morphometric parameters of laboratory population of duckweed Lemna minor

    International Nuclear Information System (INIS)

    Rasskazova, M.M.; Berestina, A.V.

    2015-01-01

    After effect of chronic gamma-exposition on Lemna minor plants, significantly decreases the specific rate of population growth, increases the process of frond's dying-off. The chronic exposition with radiation intensity 5,0 Gy/hour induces roots growth and significantly increased percent of damaged fronds. (authors)

  7. The radiation stability of glycine in solid CO2 - In situ laboratory measurements with applications to Mars

    Science.gov (United States)

    Gerakines, Perry A.; Hudson, Reggie L.

    2015-05-01

    The detection of biologically important, organic molecules on Mars is an important goal that may soon be reached. However, the current small number of organic detections at the martian surface may be due to the harsh UV and radiation conditions there. It seems likely that a successful search will require probing the subsurface of Mars, where penetrating cosmic rays and solar energetic particles dominate the radiation environment, with an influence that weakens with depth. Toward the goal of understanding the survival of organic molecules in cold radiation-rich environments on Mars, we present new kinetics data on the radiolytic destruction of glycine diluted in frozen carbon dioxide. Rate constants were measured in situ with infrared spectroscopy, without additional sample manipulation, for irradiations at 25, 50, and 75 K with 0.8-MeV protons. The resulting half-lives for glycine in CO2-ice are compared to previous results for glycine in H2O-ice and show that glycine in CO2-ice is much less stable in a radiation environment, with destruction rate constants ∼20-40 times higher than glycine in H2O-ice. Extrapolation of these results to conditions in the martian subsurface results in half-lives estimated to be less than 100-200 Myr even at depths of a few meters.

  8. Food chain effects of sublethal ultraviolet radiation on subarctic .i.Daphnia pulex./i. - a field and laboratory study

    Czech Academy of Sciences Publication Activity Database

    Zellmer, I.D.; Arts, M.T.; Šustr, Vladimír

    2006-01-01

    Roč. 167, 1-4 (2006), s. 515-531 ISSN 0003-9136 Institutional research plan: CEZ:AV0Z6066911 Keywords : UV radiation * Daphnia * enzymes Subject RIV: EH - Ecology, Behaviour Impact factor: 1.362, year: 2006

  9. Design of a synchrotron radiation detector for the test beam lines at the Superconducting Super Collider Laboratory

    International Nuclear Information System (INIS)

    Hutton, R.D.

    1994-01-01

    As part of the particle- and momentum-tagging instrumentation required for the test beam lines of the Superconducting Super Collider (SSC), the synchrotron radiation detector (SRD) was designed to provide electron tagging at momentum above 75 GeV. In a parallel effort to the three test beam lines at the SSC, schedule demands required testing and calibration operations to be initiated at Fermilab. Synchrotron radiation detectors also were to be installed in the NM and MW beam lines at Femilab before the test beam lines at the SSC would become operational. The SRD is the last instrument in a series of three used in the SSC test beam fines. It follows a 20-m drift section of beam tube downstream of the last silicon strip detector. A bending dipole just in of the last silicon strip detector produces the synchrotron radiation that is detected in a 50-mm-square cross section NaI crystal. A secondary scintillator made of Bicron BC-400 plastic is used to discriminate whether it is synchrotron radiation or a stray particle that causes the triggering of the NaI crystal's photo multiplier tube (PMT)

  10. Inter-laboratory comparison to validate the dicentric assay as a cytogenetic triage tool for medical management of radiation accidents

    Energy Technology Data Exchange (ETDEWEB)

    Beinke, Christina, E-mail: christinabeinke@bundeswehr.org [Bundeswehr Institute of Radiobiology Affiliated to the University of Ulm, Neuherbergstrasse 11, 80937 Munich (Germany); Oestreicher, Ursula [Federal Office for Radiation Protection, Neuherberg (Germany); Riecke, Armin [Department for Internal Medicine, Federal Armed Forces Hospital, Ulm (Germany); Kulka, Ulrike [Federal Office for Radiation Protection, Neuherberg (Germany); Meineke, Viktor [Bundeswehr Institute of Radiobiology Affiliated to the University of Ulm, Neuherbergstrasse 11, 80937 Munich (Germany); Romm, Horst [Federal Office for Radiation Protection, Neuherberg (Germany)

    2011-09-15

    Radiation accidents with exposure of human beings can assume huge dimensions concerning occurring health impairments and essential medical resources such as personnel, patient care management and appropriate medical facilities. Particularly in mass-casualty events, a rapid sorting and allocation of victims to treatment is needed and their classification in medical treatment groups has to be conducted as fast as possible. For triage purposes several approaches can be considered. Clinical signs and symptoms are extremely helpful in estimating radiation effects on an organ-based level, whereas the assessment of radiation effects based on cytogenetic biodosimetry tools is the alternative approach. For both systems there are pros and cons with respect to the usefulness for specific applications, such as individual cases versus mass-casualty screening or whole- versus partial-body exposures. Among the biodosimetry tools the dicentric chromosome assay (DCA) is considered as the 'gold standard' for biodosimetry after an acute radiation exposure. Recently, steady progress in standardization and harmonization of the DCA has occurred, in order to enable the validated performance of the DCA in the frame of cooperative response of biodosimetry networks during a large scale radiological scenario. Using the DCA in triage mode which allows the stratification of radiation exposed victims into broad 1.0 Gy categories only 20-50 metaphase cells per subject are scored instead of the 500-1000 scored for routine analysis. Our data show that there are significant differences between the dicentric yields after 1.0 Gy and 3.0 Gy {gamma}-ray ex vivo exposure of blood suggesting this assay as suitable for the distinction between high and low dosed exposed individuals. These preliminary findings indicate the usefulness of the DCA also for therapeutic decision making.

  11. Effects of the Gamma radiation on laboratory and field attractiveness of virgin females of the carob moth Ectomyelois ceratoniae Zeller (Lepidoptera: Pyralidae)

    International Nuclear Information System (INIS)

    Jouda Mediouni, B.

    2007-01-01

    In this paper, we studied the effects of Gamma radiation on the attractiveness of the virgin females of the carob moth, Ectomyelois ceratoniae Zeller, under laboratory and field conditions. Four Gamma radiation doses (200, 300, 400, 500 Gy) in addition to the control were studied. We examined also the effects of the age of irradiated females on their attractiveness; in particular, females 24, 48 and 72 hours old were studied. Laboratory studies showed that females' attractiveness decreased with increasing irradiation dose. At 500 Gray, 32 males were caught per week per trap against 97 males per week/trap for the control. For the doses 200, 300 and 400 Gray, the mean number of males per trap per week was 52, 51 and 50 respectively. On the other hand, for 24 hours old virgin females, the weekly mean number of caught males per trap was 63 while for 48 and 72 old females, the mean number of caught males per trap per week was 54 and 50 respectively. For field studies, results showed that irradiated females were able to attract wild males. Moreover, their attractiveness was better than the synthetic lure.

  12. Effect of low dose of ionizing radiation and psycho emotional stress on the behaviour of laboratory rats

    International Nuclear Information System (INIS)

    Rudnev, M.I.; Varetskij, V.V.; Snezhko, V.V.

    1992-01-01

    Central nervous system activation, accompanied by decline of short-term memory was observed in the radial maze in rats exposed to ionizing radiation at dose of 0.5 Gy. Irradiated animals as compared to those exposed to stress, showed inhibition of exploratory activity. This resulted in some automation in the performance. Exposure to psycho emotional stress after irradiation significantly modified the animal behaviour causing inhibition of central nervous system accompanied by decline of long-term memory. (author)

  13. Lifetime radiation effects research in animals: An overview of the status and philosophy of studies at University of California-Davis Laboratory for Energy-Related Health Research

    International Nuclear Information System (INIS)

    Goldman, M.; Rosenblatt, L.S.; Book, S.A.

    1986-01-01

    Studies on the life-shortening and carcinogenic effects of internal emitters and external irradiation have been conducted at the Laboratory for Energy-Related Health Research for over three decades. Our principal animal model has been the beagle dog. The beagle's tissue sensitivity, metabolic and dosimetric characteristics, pathologic responses, and aging changes give it relevance for the assessment of radiation risks in humans. Although our results confirm the existence of an amelioration of effects at low doses and low dose rates (the dose-rate effectiveness factor), the manifestation of the amelioration may vary. For example, with x-irradiation higher exposures appeared to decrease latency but did not alter the incidence of mammary cancer, whereas with the bone-seeking radionuclides, 90 Sr and 226 Ra, higher doses decreased the latency and increased the incidence of osteosarcomas. Radiation-induced leukemias were seen only with high doses at high dose rates but only from 90 Sr and from chronic exposures to 60 Co, mainly in dogs exposed beginning in utero. Most of the radiation-induced life shortening in dogs exposed to internal emitters appears attributable to an increased cancer risk, but this is not necessarily the case for x-irradiated dogs

  14. Mortality through 1990 among white male workers at the Los Alamos National Laboratory: Considering exposures to plutonium and external ionizing radiation

    International Nuclear Information System (INIS)

    Wiggs, L.D.; Johnson, E.R.; Cox-DeVore, C.A.; Voelz, G.L.

    1994-01-01

    A cohort mortality study was conducted of 15,727 white men employed by the Los Alamos National Laboratory, a nuclear research and development facility. Some of the workers at this facility have been exposed to various forms of ionizing radiation and other potentially hazardous materials. These analyses focused on whole-body ionizing radiation exposures and internal depositions of plutonium. The results indicated that overall mortality among this cohort is quite low, even after nearly 30 y of follow-up. No cause of death was significantly elevated among plutonium-exposed workers when compared with their unexposed coworkers; however, a rate ratio for lung cancer of 1.78 (95% CI = 0.79-3.99) was observed. A case of osteogenic sarcoma, a type of cancer related to plutonium exposure in animal studies, was also observed. Dose-response relationships for whole-body dose from external ionizing radiation and tritium were observed for cancers of the brain/central nervous system, the esophagus, and Hodgkin's disease. 34 refs., 1 fig., 7 tabs

  15. Effects of varying doses of gamma radiation on locally adapted Tradescantia clone 02 (BNL) (Brookhaven National Laboratory)

    International Nuclear Information System (INIS)

    Dimaano, Maritess M.; Imperial V, Maria Angelica Liza

    1999-03-01

    This study determined the effects of gamma radiation on the meiotic cells of Tradescantia bracteata clone 02 (BNL). The flower buds collected were exposed through dosages ranging from 1 Gy to 5 Gy using gamma cell 220 machine (AECL) in a central axis position (c/a) and grown in Peralta's solution for three days. Out of the twenty buds designated for each dosages, ten buds were treated with 0.05% colchicine solution. The occurrence of micronuclei among the irradiated pollen mother cells suggested a linear relation with the quantity of radiation dose. The occurrence of MN among cells increased linearly from 1 Gy until it reached 3 Gy and 4 Gy. Beyond this maximum dose, cells were less responsive to the dose caused by inhibition of cell division, as demonstrated in the buds exposed to 5 Gy. This result was validated through the kruskal-Wallis test, where the computed h value was 3.44 (critical region of X 2 0 . 05 = 9.49) Experimental results also showed chromosomal breaks, sticky chromosomes, and anaphase bridges in the pollen mother cells of irradiated buds. A significant numbers of cells were also found to have micronuclei, which may vary from 1 to 6 per pollen mother cell, and this showed no relationship with radiation dose. (Author)

  16. Analysis of stray radiation produced by the advanced light source (1.9 GeV synchrotron radiation source) at Lawrence Berkeley Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Ajemian, Robert C. [Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Environmental Sciences and Engineering

    1995-01-01

    The yearly environmental dose equivalent likely to result at the closest site boundary from the Advanced Light Source was determined by generating multiple linear regressions. The independent variables comprised quantified accelerator operating parameters and measurements from synchronized, in-close (outside shielding prior to significant atmospheric scattering), state-of-the-art neutron remmeters and photon G-M tubes. Neutron regression models were more successful than photon models due to lower relative background radiation and redundant detectors at the site boundary. As expected, Storage Ring Beam Fill and Beam Crashes produced radiation at a higher rate than gradual Beam Decay; however, only the latter did not include zero in its 95% confidence interval. By summing for all three accelerator operating modes, a combined yearly DE of 4.3 mRem/yr with a 90% CI of (0.04-8.63) was obtained. These results fall below the DOE reporting level of 10 mRem/yr and suggest repeating the study with improved experimental conditions.

  17. Analysis of stray radiation produced by the advanced light source (1.9 GeV synchrotron radiation source) at Lawrence Berkeley Laboratory

    International Nuclear Information System (INIS)

    Ajemian, R.C.

    1995-01-01

    The yearly environmental dose equivalent likely to result at the closest site boundary from the Advanced Light Source was determined by generating multiple linear regressions. The independent variables comprised quantified accelerator operating parameters and measurements from synchronized, in-close (outside shielding prior to significant atmospheric scattering), state-of-the-art neutron remmeters and photon G-M tubes. Neutron regression models were more successful than photon models due to lower relative background radiation and redundant detectors at the site boundary. As expected, Storage Ring Beam Fill and Beam Crashes produced radiation at a higher rate than gradual Beam Decay; however, only the latter did not include zero in its 95% confidence interval. By summing for all three accelerator operating modes, a combined yearly DE of 4.3 mRem/yr with a 90% CI of (0.04-8.63) was obtained. These results fall below the DOE reporting level of 10 mRem/yr and suggest repeating the study with improved experimental conditions

  18. Liquid scintillation systems and apparatus for measuring high-energy radiation emitted by samples in standard laboratory test tubes

    International Nuclear Information System (INIS)

    Benvenutti, R.A.

    1976-01-01

    Liquid scintillation detection system employs improved sample holders in which the cap of a glass vial is provided with a well for receiving a standard laboratory test tube containing a radioactive sample. The well is immersed in a liquid scintillator in the vial, the scintillator containing lead acetate solution to enhance its efficiency. A commercially available beta-counting liquid scintillation apparatus is modified to provide gamma-counting with the improved sample holders

  19. Viability study of a construction of invasive high voltage meter for the National Reference Laboratory of the Brazilian Net Calibration in Diagnostic Radiology, the National Laboratory of Metrology of the Ionizing Radiation - LNMRI

    International Nuclear Information System (INIS)

    Quaresma, D.S.; Peixoto, J.G.P.; Pereira, M.A.G.

    2007-01-01

    This work has studied the parameters for the construction of an invasive high voltage meter for the National Reference Laboratory of the Brazilian Net Calibration in Diagnostic Radiology, the National Laboratory of Metrology of the Ionizing Radiation - LNMRI. This study took into consideration the necessity of quality control of the of X-rays equipment required by Ministry of Health - MS, through the regulation N.453. To satisfy the demands of the MS, the recommendation of the norm IEC 61676 was analyzed by using the quantity of Practical Peak Voltage (PPV) in the measurements of the voltage discharge applied to the X-rays tubes, the infra structures of metrology available in the country to offer tracking the components of the high voltage meter through INMETRO and the difficulty of adaptation of the high voltage meter analyser III U in relation to the Pan tak HF160 equipment in which respect the connection of the high voltage cable and the voltage limitations due to the electric configuration of the high voltage generator of the constant potential Pantak HF160 equipment. (author)

  20. Quality control of secondary standards and calibration systems, therapy level, of National Laboratory of Metrology from Ionizing Radiations (LNMRI)

    International Nuclear Information System (INIS)

    Cecatti, E.R.; Freitas, L.C. de

    1992-01-01

    The results of quality control program of secondary standards, therapy level, and the calibration system of clinical dosemeters were analysed from 1984, when a change in the laboratory installation occurred and new standards were obtained. The national and the international intercomparisons were emphasised. The results for graphite wall chambers were compared, observing a maximum variation of about 0,6%. In the case of Delrin (TK01) wall chambers, the maximum variation was 1,7%. The results of post intercomparisons with thermoluminescent dosemeters have presented derivations lesser than 1%, securing the standards consistence at LNMRI with the international metrological system. (C.G.C.)

  1. Intercomparison exercise on external gamma dose rate under field conditions at the laboratory of natural radiation (Saelices el Chico, Spain)

    International Nuclear Information System (INIS)

    Gutierrez-Villanueva, J. L.; Sainz-Fernandez, C.; Fuente-Merino, I.; Saez-Vergara, J. C.; Correa-Garce, E.; Quindos-Poncela, L. S.

    2013-01-01

    The last nuclear accident in Fukushima nuclear power plant has increased the necessity for measuring radiation in the environment. Therefore, radiation monitors providing results traceable throughout the country become essential and it is very important to test them under the same environmental conditions. The first intercomparison of natural radioactivity under field conditions was held in Saelices el Chico (Salamanca, Spain) in May 2011, including an exercise on environmental dose rate. This article presents the results achieved by 19 instruments belonging to 12 institutions from 7 different countries. The tested detectors are proportional counters, ionisation chambers, Geiger-Mueller and scintillators measuring dose rate in three stations with reference values from 110 to 1800 nGy h -1 All the results were given in terms of air kerma (nGy h -1 ) and the measurements show agreement within 25 % in all the sites. Evaluation criteria based on accuracy and statistical uncertainty were also carried out and 25 % of participants passed the test in all sites. (authors)

  2. Effects of gamma radiation from Cobalt 60 on eggs and adults of Sitotroga cerealella (Oliver, 1819) (Lepidoptera, Gelechiidae) in laboratory

    International Nuclear Information System (INIS)

    Rodrigues, Z.A.; Rego, A.M.; Oliveira, M.L. de; Ferreira, D.

    1983-01-01

    Lethal and sterilizing dosages from Cobalt-60 radiations were determined for Sitotroga cerealella (Oliver, 1819) eggs and adults. Eggs at the age of 0 to 24 hours were irradiated with dosages of 0,1,2; 4,6,8,10 and 12 krad; it was observed that 10 krad killed all embryos although this was not observed in 96 hours old eggs. A new group was irradiated with dosages of 0,60,80,100,120 and 140 krad, and complete lethal dosage was determined as 140 krad. Mating of irradiated with non irradiated insects resulted in 100% infertile eggs when either the males or females had received the dosage of 100 krad. Imediate lethality of S. cerealella adults was not observed with the dosages of 300 to 320 krad but all insects died after two days (L sup(D) 100/ 2 ). (Author) [pt

  3. Radiation tumorigenesis in inbred laboratory animals and cancer risks in irradiated human populations. Two widely different problems

    International Nuclear Information System (INIS)

    Walinder, G.

    1978-01-01

    The mammal has efficient defence mechanisms against the development of tumours. These mechanisms are successively deteriorated by ionizing radiation when the dose increases beyond certain 'borderline levels'. Consequently, most animal strains demonstrate a bi-phasic dose-tumour relationship with a low-dose limb, the slope of which cannot be distinguished from zero, and a high-dose limb that increases with increasing doses. There are four or five exceptions to this 'rule' but in most of these cases the probable reasons for the deviations are known. Some human tumours as observed in epidemiological investigations do not demonstrate a similar clearly bi-phasic dose response. In all probability, this discrepancy does not reflect a higher susceptibility to radiation-induced tumours in man compared with other mammals. It is rather a consequence of a greater statistical variation in radiosensitivity in heterogeneous human populations than among inbred animals living standardized conditions. Accordingly, when maximum permissible dose levels are to be determined one should extrapolate from epidemiological data. Furthermore, these extrapolations should be linear if the data do not clearly deviate from a straight line, and if there are no scientific reasons to assume that a threshold exists. This formal method would not produce a biological description of what may happen in the low-dose area but rather an upper risk limit for the population studied. The real low-dose risk cannot be known. For the same pragmatic reason other radiological or non-radiological risks should be determined in the same manner, particularly when risks are to be compared. (author)

  4. Chronic radiation injury with mice and dogs exposed to external whole-body irradiation at the Argonne National Laboratory

    International Nuclear Information System (INIS)

    Grahn, D.; Fritz, T.E.

    1986-01-01

    This document describes studies on chronic radiation injury in experimental animals and the extrapolation of derived injury parameters to man. Most of the large studies have used mice given single, weekly, or continuous exposure to cobalt-60 gamma rays, or, more recently, single or weekly exposure to fission neutrons from the JANUS reactor. Primary measures of injury have been life shortening and the associated major pathological changes, particularly neoplastic diseases. Recent and ongoing studies compare the effects of extremely low neutron exposures with gamma irradiations delivered as a single dose or in 60 equal weekly increments. Total neutron doses range from 1 to 40 rads; gamma-ray doses range from 22.5 to 600 rads. Selected genetic studies are performed concurrently to provide a nearly complete matrix of somatic and genetic effects of these low exposures. Studies with the beagle have complemented those with mice and have shown a strong parallelism in the responses of the two species. Present exposures are at 0.3, 0.75, and 1.88 rads per day of continuous gamma irradiation to test a model for the prediction of life shortening in man which has evolved from Argonne's long-term studies. The dog offers the opportunity for longitudinal clinical evaluations that are not possible in the mouse, to develop a broader view of the neoplastic disease spectrum, and to study the mechanisms of radiation induction of leukemia. Diverse statistical approaches have been used to measure excess risk, dose-response functions, and rates of injury and repair. Actuarial statistical methods have been favored since they permit a more direct means of extrapolation to man. 50 refs., 4 figs

  5. Measurement of organ doses from external γ-radiation in the environment of a nuclear research laboratory

    International Nuclear Information System (INIS)

    Jones, A.R.

    1978-06-01

    Thermoluminescent dosimeters (TLD) are used to monitor the γ-ray exposure in the environment at the Chalk River Nuclear Laboratories. To relate the exposure to the doses absorbed by humans in this environment a set of measurements has been made of the doses at various sites within a phantom, placed out-of-doors, while measuring the exposure simultaneously. The measurements have been made with sensitized LiF-TLD's for exposures lasting several months in order to obtain adequate accuracy at the low exposure rates (5 - 50 μR/h) encountered. The exposure was measured with TLD's placed one metre from the ground and on four sides of the phantom and two metres away. Measurements made of the internal radioactivity of the phantom showed that this contributed less than 0.2 μR/h to the TLD's lodged within the phantom

  6. Thirty-sixth Lauriston S. Taylor Lecture on radiation protection and measurements--from the field to the laboratory and back: the what ifs, wows, and who cares of radiation biology.

    Science.gov (United States)

    Brooks, Antone L

    2013-11-01

    My scientific journey started at the University of Utah chasing fallout. It was on everything, in everything, and was distributed throughout the ecosystem. This resulted in radiation doses to humans and caused me great concern. From this concern I asked the question, "Are there health effects from these radiation doses and levels of radioactive contamination?" I have invested my scientific career trying to address this basic question. While conducting research, I got acquainted with many of the What ifs of radiation biology. The major What if in my research was, "What if we have underestimated the radiation risk for internally-deposited radioactive material?" While conducting research to address this important question, many other What ifs came up related to dose, dose rate, and dose distribution. I also encountered a large number of Wows. One of the first was when I went from conducting environmental fallout studies to research in a controlled laboratory. The activity in fallout was expressed as pCi L⁻¹, whereas it was necessary to inject laboratory animals with μCi g⁻¹ body weight to induce measurable biological changes, chromosome aberrations, and cancer. Wow! That is seven to nine orders of magnitude above the activity levels found in the environment. Other Wows have made it necessary for the field of radiation biology to make important paradigm shifts. For example, one shift involved changing from "hit theory" to total tissue responses as the result of bystander effects. Finally, Who cares? While working at U.S. Department of Energy headquarters and serving on many scientific committees, I found that science does not drive regulatory and funding decisions. Public perception and politics seem to be major driving forces. If scientific data suggested that risk had been underestimated, everyone cared. When science suggested that risk had been overestimated, no one cared. This result-dependent Who cares? was demonstrated as we tried to generate interactions

  7. Collaborative Radiological Health Laboratory annual report 1986: health effects of prenatal and postnatal whole-body exposure to ionizing radiation in the beagle dog

    International Nuclear Information System (INIS)

    1987-08-01

    The Collaborative Radiological Health Laboratory was established in 1962 by the U.S. Public Health Service and Colorado State University for the purpose of determining in a carefully controlled animal experiment the life-time hazards associated with prenatal and early postnatal exposure to ionizing radiation. The CRHL study is designed to provide information that will facilitate the evaluation of risks to human beings from medical exposure during early development. This is a long-term (lifespan) study of a moderately large and long-lived mammal exposed at one of several times during development to a relatively small and discrete dose of external radiation. Ages-at-irradiation selected for comparison reflect the primary concern with medical exposures during the development period. The basis experiment under this contract contains 1,680 beagles that will be maintained and evaluated for most of their natural lives. Commitment of animals began in December 1967 and was completed in October 1972. The annual report summarizes the current status of the study for the reporting period of November 21, 1985 through November 20, 1986

  8. Collaborative Radiological Health Laboratory annual report 1987: health effects of prenatal and postnatal whole-body exposure to ionizing radiation in the beagle dog. Annual report

    International Nuclear Information System (INIS)

    1988-09-01

    The Collaborative Radiological Health Laboratory (CRHL) was established in 1962 by the U.S. Public Health Service and Colorado State University for the purpose of determining in a carefully controlled animal experiment the lifetime hazards associated with prenatal and early postnatal exposure to ionizing radiation. The CRHL study is designed to provide information that will facilitate the evaluation of risks to human beings from medical exposure during early development. It is a long-term (life span) study of a moderately large and long-lived mammal exposed at one of several times during development to a relatively small and discrete dose of external radiation. Ages-at-irradiation selected for comparison reflect the primary concern with medical exposures during the developmental period. The basic experiment under the contract contains 1,680 beagles that will be maintained and evaluated for most of their natural lives. The annual report summarizes the current status of the study for the reporting period of November 21, 1986 through November 20, 1987

  9. Collaborative Radiological Health Laboratory annual report, 1988: Health effects of prenatal and postnatal whole-body exposure to ionizing radiation in the beagle dog

    International Nuclear Information System (INIS)

    1989-09-01

    The Collaborative Radiological Health Laboratory was established in 1962 by the U.S. Public Health Service and Colorado State University for the purpose of determining, in a carefully controlled animal experiment, the life-time hazards associated with prenatal and early postnatal exposure to ionizing radiation. The CRHL study is designed to provide information that will facilitate the evaluation of risks to human beings from medical exposure during early development. This is a long-term (life span) study of a moderately large and long-lived mammal exposed at one of several times during development to a relatively small and discrete dose of external radiation. Ages-at-irradiation selected for comparison reflect the primary concern with medical exposures during the developmental period. The basic experiment under the contract contains 1,680 beagles that will be maintained and evaluated for most of their natural lives. Commitment of animals began in December 1967 and was completed in February 1973. The annual report summarizes the current status of the study for the reporting period of November 21, 1987 through November 20, 1988

  10. Collaborative Radiological Health Laboratory annual report 1985: health effects of prenatal and postnatal whole-body exposure to ionizing radiation in the beagle dog

    International Nuclear Information System (INIS)

    1986-07-01

    The Collaborative Radiological Health Laboratory was established in 1962 by the U.S. Public Health Service and Colorado State University for the purpose of determining in a carefully controlled animal experiment the life-time hazards associated with prenatal and early postnatal exposure to ionizing radiation. The CRHL study is designed to provide information that will facilitate the evaluation of risks to human beings from medical exposure during early development. This is a long-term (lifespan) study of a moderately large and long-lived mammal exposed at one of several times during development to a relatively small and discrete dose of external radiation. Ages-at-irradiation selected for comparison reflect the primary concern with medical exposures during the development period. The basic experiment under the contract contains 1,680 beagles that will be maintained and evaluated for most of their natural lives. Commitment of animals began in December 1967 and was completed in October 1972. The annual report summarizes the current status of the study for the reporting period of November 21, 1984 through November 20, 1985

  11. Performance of the undulator based ultraviolet and soft x-ray beamline for catalysis and surface science at National Synchrotron Radiation Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Du, Liangliang [University of Science and Technology of China, Department of Precision Machinery and Precision Instrumentation, Hefei, Anhui 230029 (China); University of Science and Technology of China, National Synchrotron Radiation Laboratory, Hefei, Anhui 230029 (China); Du, Xuewei, E-mail: xwdu@ustc.edu.cn [University of Science and Technology of China, National Synchrotron Radiation Laboratory, Hefei, Anhui 230029 (China); Wei, Shen [University of Science and Technology of China, National Synchrotron Radiation Laboratory, Hefei, Anhui 230029 (China); Li, Chaoyang [China Academy of Engineering Physics, Mianyang, Sichuan 621900 (China); Pan, Congyuan; Ju, Huanxin [University of Science and Technology of China, National Synchrotron Radiation Laboratory, Hefei, Anhui 230029 (China); Wang, Qiuping, E-mail: qiuping@ustc.edu.cn [University of Science and Technology of China, National Synchrotron Radiation Laboratory, Hefei, Anhui 230029 (China); Zhu, Junfa [University of Science and Technology of China, National Synchrotron Radiation Laboratory, Hefei, Anhui 230029 (China)

    2016-12-01

    The undulator based ultraviolet and soft x-ray beamline BL11U for catalysis and surface science at National Synchrotron Radiation Laboratory (NSRL) has been under opteration for months and the present performance is described. This beamline utilizes radiation from an in-vacuum undulator, which has 30 magnetic periods with the period length of 40 mm. A varied-line-spacing plane grating monochromator is employed tto cover the photon energy region of 20–600 eV by two gratings with nominal groove densities of 400 llmm and 1200 l/mm respectively. The energy resolution power E/ΔE is measured with a gas ionization chamber and the photon flux is measured by a photodiode. Results show that the resolution power is better than 10,000 at a photon energy of 29.2 eV. And the flux is higher than 1×10{sup 10} phs/s under 300 mA ring beam current for most of the covered photon energy.

  12. Comet 67P/Churyumov-Gerasimenko Surface Composition as a Playground for Radiative Transfer Modeling and Laboratory Measurements: an international ISSI team

    Science.gov (United States)

    Stephan, K.; Ciarniello, M.; Beck, P.; Filacchione, G.; Moroz, L.; Pilorget, C.; Pommerol, A.; Quirico, E.; Raponi, A.; Schröder, S.; Kappel, D.; Vinogradoff, V.; Istiqomah, I.; Rousseau, B.

    2017-12-01

    Remote sensing observations at visible-infrared (VIS-IR) wavelengths of the nucleus of comet 67P/Churyumov-Gerasimenko performed by VIRTIS (Coradini et al., 2007) aboard the Rosetta mission have revealed a surface ubiquitously covered by low-albedo material (Capaccioni et al., 2015; Ciarniello et al., 2015), characterized by the presence of refractory and semi-volatile organics and dark opaque phases (Capaccioni et al., 2015; Quirico et al., 2016). However, a quantitative determination of the physical properties (grain size, porosity) and chemical composition of the surface regolith, from spectrophotometric analysis, is still missing. This subject will be investigated within an international team hosted by ISSI (International Space Science Institute), taking advantage of available and dedicated laboratory reflectance measurements on cometary analogue samples and radiative transfer models (Hapke, 2012; Shkuratov et al., 1999; Monte Carlo ray-tracing), applied to Rosetta spectrophotometric observations of the nucleus. The convergence between models and measurements will allow us to provide a thorough characterization of 67P/Churyumov-Gerasimenko surface. At the same time, the comparison of theoretical predictions with results from laboratory reflectance spectroscopy on powders of analog materials give us the possibility to constrain the capability of the models to characterize their composition (endmember abundances and mixing modalities) and physical properties. We report about the state of the art of laboratory reflectance spectroscopy and spectral modeling applied to 67P/Churyumov-Gerasimenko VIS-IR spectrum as well as preliminary results of the team activity and planned future work. Acknowledgements: the team thanks ISSI-Switzerland for the logistic and financial support.

  13. THE HISTORY OF ESTABLISHMENT OF THE NATURAL SOURCES DOSIMETRY LABORATORY IN THE INSTITUTE OF RADIATION HYGIENE AFTER PROFESSOR P.V. RAMZAEV, 1987–2005

    Directory of Open Access Journals (Sweden)

    I. P. Stamat

    2016-01-01

    Full Text Available The first 5–7 years of the period under review in the history of the Natural Sources Dosimetry Laboratory happened to be in very hard period, which had a time the entire country. A severe funding reduction of the Institute in the 90-s created a threat of loss of the most active and highly professional middle-aged specialists. In these conditions, the only and the most efficient way to maintain Institute as a scientific establishment was to organize the Federal Radiological Center under the guidance of Dr. A.N. Barkovskiy. The Federal Radiological Center consisted of the all physical laboratories, including the Natural Sources Dosimetry Laboratory, without government funding. Nevertheless, as it is shown below, this period was the most fruitful for theoretical and experimental researches, and for development of legal documents and instructional guidance documents. Over these years, more than 10 sanitary regulations and hygienic standards, and more than 20 guidance documents were developed and implemented. Doses of the population due to the natural exposure data-collecting system on the base of federal statistical observation №4-DOZ form were designed. At this period, the first Federal Target Program «Radon» and the System of radiation and hygienic passportization of organizations and territories were developed and authorized. Dr. E.M. Krisiuk was fully engaged in these activities. In these years a great number of non-nuclear companies were examined. Large-scale studies of levels of exposure of the population on specific territories were conducted. The paper examines a summary of the main results, which were obtained in the most important areas of research and practical studies in the period under review.

  14. ITRAP - International laboratory and field test site exercise for radiation detection instruments and monitoring systems at border crossings

    International Nuclear Information System (INIS)

    Beck, P.; Schmitzer, C.; Duftschmid, K.E.; Arlt, R.

    2001-01-01

    Illicit trafficking in nuclear materials has become more and more a problem, due to the circulation of a high number of radioactive sources and the big amount of nuclear material. The IAEA database counts at present more than 300 verified cases. The endangering cased thereby ranges from possible health defect for the publication to terrorists activities and production of nuclear weapons. In addition to the primary criminal reasons the illegal disposal of radioactive sources as salvage, scrap and others show a further problem, which has lead to severe accidents and lethal effects in the past (e.g. Goiana, Mexico). Some countries have already under taken countermeasures (e.g. Monitoring at the Finnish-Russian and German- Polish border, border monitoring in Italy). The International Atomic Energy Agency (IAEA) has reacted on this actual problem by setting up a new program to fight against nuclear criminality and has suggested a pilot study for the practical test of border monitoring systems. Co-ordinated by the Federal Ministry of Economy and Labour the Austrian Government financed the pilot study ITRAP (Illicit Trafficking Radiation Detection Assessment Program) carried out by the Austrian Research Centers Seibersdorf (ARCS). Aim of the study was to work out the technical requirements and the practicability of an useful monitoring system at border crossings. The results of the study will be offered by the IAEA to the member states as international recommendations for border monitoring systems

  15. Auditable safety analysis: High Radiation Level Chemical Development Facility (Buildings 4507 and 4556), Oak Ridge National Laboratory, Oak Ridge, Tennessee

    International Nuclear Information System (INIS)

    Platfoot, J.H.

    1998-07-01

    The High-Radiation-Level Chemical Development Facility includes Buildings 4507 and 4556. Building 4507, located immediately to the west of Building 4500N and to the south of Building 4505, is a doubly contained three-level structure constructed in 1957. The most recent use of the facility was for recovery of multi-gram quantities of 244 Cm during the early 1970s and for Liquid Metal Fast Breeder Reactor (LMFBR) fuel studies in the late 1970s. It has remained in safe standby since 1980. Building 4556 is a below-grade filter pit located to the southwest of Building 4507 and was constructed in 1972. Ventilation from the cells in Building 4507 is passed through high-efficiency particulate air (HEPA) filtration in this building prior to being exhausted to the Building 3039 stack system. This building remains in operation to support ventilation requirements for Building 4507. This Auditable Safety Analysis (ASA) was developed in accordance with the requirements in Energy Systems Program Description FS-103PD, Safety Documentation, Revision 1. This ASA identifies and screens all hazards associated with Buildings 4507 and 4556. The only hazard not screened out and requiring further analysis following the initial screening process is radioactive material in the form of surface contamination. The results of this ASA indicate that the hazards associated with Buildings 4507 and 4556 do not pose a significant threat to workers, the public, or the environment

  16. Operational radiation protection in the PET/MRI Installation of Research Laboratory of Human Cardiovascular imaging of the CNIC; Proteccion radiologica operacional en la instalacion PET/RM del laboratorio de investigacion de imagen cardiovascular humana del CNIC

    Energy Technology Data Exchange (ETDEWEB)

    Escudero Toro, R.; Delgado Alberquilla, R.; Moreno Lopez, J.; Lopez, G.

    2013-07-01

    The objective of this study is to describe the implications in the design of facilities, shielding calculation and design of radioactive sources of calibration encapsulated compatible with RM and, on the other hand, specify, after the start-up of the laboratory, the operational monitoring of the installation, the use of monitors pollution and radiation within the room and its compatibility with the RM, dosimetry control area and exposed personnel and occupational radiation protection and the patient. (Author)

  17. X-ray diffraction studies of Pompeian wall paintings using synchrotron radiation and dedicated laboratory made systems

    International Nuclear Information System (INIS)

    Duran, A.; Castaing, J.; Walter, P.

    2010-01-01

    The full identification of artwork materials requires not only elemental analysis but also structural information of the compounds as provided by X-ray diffraction (XRD). This is easily done when taking samples (or micro-samples) from artworks. However, there is an increasing interest in performing non-destructive studies that require adapted XRD systems. Comparative study of synchrotron high-resolution X-ray powder diffraction (SR-HRPD) and laboratory non-destructive systems (portable XRD and micro-XRD) is the main objective of this work. There are no qualitative differences among the three systems as for detected phases in the Pompeian wall paintings that were studied, except in the case of minority phases which only were detected by SR-HRPD. The identified pigments were goethite, hematite, cinnabar, glauconite, Pompeian blue, together with calcite, dolomite and aragonite. Synchrotron XRD diagrams show better resolution than the others. In general, the peak widths in the diagrams obtained with the portable XRD system are similar to those obtained by micro-diffraction equipment. Factors such as residual divergence of X-ray sources, incidence angle and slit or collimator size are discussed in relation with the quality of XRD diagrams. (orig.)

  18. Radiation protection - Performance criteria for laboratories performing cytogenetic triage for assessment of mass casualties in radiological or nuclear emergencies - General principles and application to dicentric assay

    International Nuclear Information System (INIS)

    2008-01-01

    The potential for nuclear and radiological emergencies involving mass casualties from accidental or malicious acts or terrorism requires generic procedures for emergency dose assessment to help the development of medical response capabilities. A mass-casualties incident is defined here as an event that exceeds the local medical resources. Biological dosimetry, based on cytogenetic analysis using the dicentric assay, typically applied for accidental dose assessment, has been defined in ISO 19238. Cytogenetic triage is the use of chromosome damage to evaluate and assess approximately and rapidly radiation doses received by individuals in order to supplement the clinical categorization of casualties. This International Standard focuses on the use of the dicentric assay for rapid cytogenetic triage involving mass-casualty incidents. The primary purpose of this International Standard is to provide a guideline to all laboratories in order to perform the dicentric-bioassay - cytogenetic triage for dose assessment using documented and validated procedures. Secondly, it can facilitate the application of cytogenetic biodosimetry networks to permit comparison of results obtained in different laboratories. Finally, it is expected that laboratories newly commissioned to carry out the cytogenetic triage conform to this International Standard in order to perform the triage reproducibly and accurately. This International Standard is written in the form of procedures to adopt for dicentric-bioassay - cytogenetic triage biological dosimetry for overexposures involving mass radiological casualties. The criteria required for such measurements usually depend on the application of the results: medical management when appropriate, radiation-protection management, record keeping and medical/legal requirements. For example, selected cases can be analysed to produce a more accurate evaluation of high partial-body exposure; secondly, doses can be estimated for persons exposed below the

  19. Effect of Solar Radiation on the Optical Properties and Molecular Composition of Laboratory Proxies of Atmospheric Brown Carbon

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Hyun Ji; Aiona, Paige K.; Laskin, Alexander; Laskin, Julia; Nizkorodov, Sergey

    2014-09-02

    Sources, optical properties, and chemical composition of atmospheric brown carbon (BrC) aerosol are uncertain, making it challenging to estimate its contribution to radiative forcing. Furthermore, optical properties of BrC may change significantly during its atmospheric aging. We examined the effect of solar photolysis on the molecular composition, mass absorption coefficient, and fluorescence of secondary organic aerosol prepared by high-NOx photooxidation of naphthalene (NAP SOA). The aqueous solutions of NAP SOA was observed to photobleach with an effective half-time of ~15 hours (with sun in its zenith) for the loss of the near-UV (300 -400 nm) absorbance. The molecular composition of NAP SOA was significantly modified by photolysis, with the average SOA formula changing from C14.1H14.5O5.1N0.08 to C11.8H14.9O4.5N0.02 after 4 hours of irradiation. The average O/C ratio did not change significantly, however, suggesting that it is not a good metric for assessing the extent of photolysis-driven aging in NAP SOA (and in BrC in general). In contrast to NAP SOA, the photolysis of BrC material produced by aqueous reaction of limonene+O3 SOA (LIM/O3 SOA) with ammonium sulfate was much faster, but it did not result in a significant change in the molecular level composition. The characteristic absorbance of the aged LIM/O3 SOA in the 450-600 nm range decayed with an effective half-time of <0.5 hour. This result emphasizes the highly variable and dynamic nature of different types of atmospheric BrC.

  20. Lawrence and his laboratory

    International Nuclear Information System (INIS)

    Hellbron, J.L.; Seidel, R.W.

    1989-01-01

    The birthplace of nuclear chemistry and nuclear medicine is the subject of this study of the Radiation Laboratory in Berkeley, California, where Ernest Lawrence used local and national technological, economic, and manpower resources to build the cyclotron

  1. Health Physics Laboratory - Overview

    International Nuclear Information System (INIS)

    Olko, P.

    2000-01-01

    Full text: The activities of the Health Physics Laboratory at the Institute of Nuclear Physics in Cracow are principally research in the general area of radiation physics, and radiation protection of the employees of the Institute of Nuclear Physics. Theoretical research concerns modelling of radiation effects in radiation detectors and studies of concepts in radiation protection. Experimental research, in the general area of solid state dosimetry, is primarily concerned with thermoluminescence (TL) dosimetry, and more specifically: development of LiF:Mg, Ti and CVD diamond detectors for medical applications in conventional and hadron radiotherapy and of LiF:Mg, Cu, P for low-level natural external ionising radiation. Environmental radiation measurements (cosmic-rays on aircraft and radon in dwellings and soil) are also performed using track CR-39 and TLD detectors. The Laboratory provides expert advice on radiation protection regulations at national and international levels. Routine work of the Health Physics Laboratory involves design and maintenance of an in-house developed TL-based personnel dosimetry system for over 200 radiation workers at the INP, supervision of radiation safety on INP premises, and advising other INP laboratories on all matters pertaining to radiation safety. We provide personal and environmental TLD dosimetry service for several customers outside the INP, mainly in hospitals and nuclear research institutes in Poland. We also calibrate radiation protection instruments for customers in southern Poland. The year 2000 was another eventful year for the Health Physics Laboratory. We started three new research projects granted by the Polish State Committee of Scientific Research. Mr P. Bilski co-ordinates the project on the measurements of radiation doses on board of commercial aircraft of Polish LOT Airlines. Dr B. Marczewska and I worked on the application of artificial diamonds for dosimetry of ionising radiation. We also participate in a

  2. Use of the EC quality criteria as a common method of inspecting CT laboratories - A pilot project by the Nordic radiation protection authorities

    International Nuclear Information System (INIS)

    Torp, C.G.; Olerud, H.M.; Einarsson, G.; Groen, P.; Leitz, W.; Servomaa, A.

    2001-01-01

    In the frame of Nordic radiation protection co-operation, quality criteria for computed tomography (CT) as published by the European Commission were used for the evaluation of selected CT laboratories in each of the Nordic countries. The mean values for all five countries of the weighted CT dose index (CTDI w ) and dose length product (DLP) were 60 mGy and 740 mGy · cm for CT of the brain, 11 mGy and 420 mGy · cm for CT of the chest, and 40 mGy and 420 mGy · cm for CT of the lumbar spine, respectively. A comparison with the reference levels set in the above mentioned publication gives a diversified result: compliance for the DLP-values is generally achieved with good margins whereas the CTDI w -values were frequently larger for brain and lumbar spine examinations. The radiographic technique was generally also within the recommendations from the EC. Generally most of the image quality criteria were fulfilled, but it must be borne in mind that the study was biased in the way that two local radiologists in consensus evaluated their own images. Image material from only three patients was selected for each of the clinical indications, that means the project was not designed for ranking laboratories, but it is a way of making the departments aware of the need for optimisation regarding image quality and patient dose, and also of the problems associated with this task. During the study suggestions were brought forward concerning amendments of the quality criteria: some need a better definition, some are not relevant for the diagnostic task in question, some could be added. Instead of 'yes' and 'no', a range of maybe 5 levels of visualisation should be introduced in order to better characterize the level of diagnostic performance. (author)

  3. Final deactivation project report on the High Radiation Level Analytical Facility, Building 3019B at Oak Ridge National Laboratory, Oak Ridge, Tennessee

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-09-01

    The purpose of this report is to document the condition of the High Radiation Level Analytical Facility (Building 3019B) at Oak Ridge National Laboratory (ORNL) after completion of deactivation activities. This report identifies the activities conducted to place the facility in a safe and environmentally sound condition prior to transfer to the Environmental Restoration EM-40 Program. This document provides a history and description of the facility prior to the commencement of deactivation activities and documents the condition of the building after completion of all deactivation activities. Turnover items, such as the Post-Deactivation Surveillance and Maintenance (S&M) Plan, remaining hazardous materials inventory, radiological controls, safeguards and security, quality assurance, facility operations, and supporting documentation provided in the Nuclear Material and Facility Stabilization (EM-60) Turnover package are discussed. Building 3019B will require access to perform required S&M activities to maintain the building safety envelope. Building 3019B was stabilized during deactivation so that when transferred to the EM-40 Program, only a minimal S&M effort would be required to maintain the building safety envelope. Other than the minimal S&M activities the building will be unoccupied and the exterior doors locked to prevent unauthorized access. The building will be entered only to perform the required S&M until decommissioning activities begin.

  4. Clay pigment structure characterisation as a guide for provenance determination--a comparison between laboratory powder micro-XRD and synchrotron radiation XRD.

    Science.gov (United States)

    Švarcová, Silvie; Bezdička, Petr; Hradil, David; Hradilová, Janka; Žižak, Ivo

    2011-01-01

    Application of X-ray diffraction (XRD)-based techniques in the analysis of painted artworks is not only beneficial for indisputable identification of crystal constituents in colour layers, but it can also bring insight in material crystal structure, which can be affected by their geological formation, manufacturing procedure or secondary changes. This knowledge might be helpful for art historic evaluation of an artwork as well as for its conservation. By way of example of kaolinite, we show that classification of its crystal structure order based on XRD data is useful for estimation of its provenance. We found kaolinite in the preparation layer of a Gothic wall painting in a Czech church situated near Karlovy Vary, where there are important kaolin deposits. Comparing reference kaolin materials from eight various Czech deposits, we found that these can be differentiated just according to the kaolinite crystallinity. Within this study, we compared laboratory powder X-ray micro-diffraction (micro-XRD) with synchrotron radiation X-ray diffraction analysing the same real sample. We found that both techniques led to the same results.

  5. Final deactivation project report on the High Radiation Level Analytical Facility, Building 3019B at Oak Ridge National Laboratory, Oak Ridge, Tennessee

    International Nuclear Information System (INIS)

    1997-09-01

    The purpose of this report is to document the condition of the High Radiation Level Analytical Facility (Building 3019B) at Oak Ridge National Laboratory (ORNL) after completion of deactivation activities. This report identifies the activities conducted to place the facility in a safe and environmentally sound condition prior to transfer to the Environmental Restoration EM-40 Program. This document provides a history and description of the facility prior to the commencement of deactivation activities and documents the condition of the building after completion of all deactivation activities. Turnover items, such as the Post-Deactivation Surveillance and Maintenance (S ampersand M) Plan, remaining hazardous materials inventory, radiological controls, safeguards and security, quality assurance, facility operations, and supporting documentation provided in the Nuclear Material and Facility Stabilization (EM-60) Turnover package are discussed. Building 3019B will require access to perform required S ampersand M activities to maintain the building safety envelope. Building 3019B was stabilized during deactivation so that when transferred to the EM-40 Program, only a minimal S ampersand M effort would be required to maintain the building safety envelope. Other than the minimal S ampersand M activities the building will be unoccupied and the exterior doors locked to prevent unauthorized access. The building will be entered only to perform the required S ampersand M until decommissioning activities begin

  6. Bioassay Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Bioassay Laboratory is an accredited laboratory capable of conducting standardized and innovative environmental testing in the area of aquatic ecotoxicology. The...

  7. HYDROMECHANICS LABORATORY

    Data.gov (United States)

    Federal Laboratory Consortium — Naval Academy Hydromechanics LaboratoryThe Naval Academy Hydromechanics Laboratory (NAHL) began operations in Rickover Hall in September 1976. The primary purpose of...

  8. Report on a workshop to examine methods to arrive at risk estimates for radiation-induced cancer in the human based on laboratory data. Jointly sponsored by the Office of Health and Energy Research, Department of Energy, and Columbia University.

    Science.gov (United States)

    1993-09-01

    This summary is a record of discussions and the general consensus reached by the participants. The views expressed are those of the attending scientists and do not necessarily represent the policy or opinion of the Department of Energy. An urgent need is recognized for better estimates of the risk of cancer from low levels of radiation. This need arises because of the ongoing nuclear energy option, the hazard of naturally occurring radon, and the possibility of an increasing number of lawsuits by individuals exposed to radiation in the past. The most recent estimates of risk evaluated by UN-SCEAR and BEIR V rely heavily on epidemiological studies of the A-bomb survivors which have recognized limitations and cannot provide direct risk information for chronic low-dose-rate exposure such as that experienced in occupational and medical settings. It was the consensus view that an effort to obtain information relative to risk estimates for radiation-induced cancer in humans, based on laboratory data, would be both important and timely: important, because of the opportunity to extend existing epidemiological data and overcome existing limitations; and timely, because of advances in cellular and molecular biology. In the short term, such an effort could supplement epidemiological data by providing information on the variation of cancer risk estimates with radiation dose rate and radiation quality and by providing guidance on the extrapolation of data measured at high doses to low dose regions where direct measurements are not feasible. In the long term, it may be possible to use new information about the genome from cellular and molecular studies to refine epidemiological data, i.e., to integrate classical epidemiological approaches with cell and animal biology as well as molecular genetics. Laboratory-based studies may be able to supplement epidemiological studies by: (1) identifying the molecular lesions involved in radiation-induced cancer and resolving dose, dose

  9. Precautions against radiations

    International Nuclear Information System (INIS)

    Osborn, S.B.

    1986-01-01

    In this chapter the characteristics of ionizing and non-ionizing radiations likely to cause hazards in a chemical laboratory are considered. Quantities and units of radiation are described. The general principles of radiation protection, precautions against radiation hazards, ICRP standards and recommendations and the legislation relating to the control of radiation hazards in the UK are discussed. (U.K.)

  10. Complete Biological Evaluation of Therapeutical Radiopharmaceuticals in Rodents, Laboratory Beagles and Veterinary Patients - Preclinical Distribution-, Kinetic-, Excretion-, Internal Dosimetry-, Radiotoxicological-, Radiation Safety- and Efficacy Data

    International Nuclear Information System (INIS)

    Balogh, L.; Domokos, M.; Polyak, A.; Thuroczy, J.; Janoki, G.

    2009-01-01

    The research and development of various novel therapeutical radiopharmaceuticals is a huge demand in many laboratories world-wide. Beside of multiple bone metastases pain-palliation and radiosynovectomy agents a number of specific radiopharmaceutical applicants mainly for oncological applications are in the pipeline. Numerous in vitro methods are available in the first line to test the radiolabelling efficiency, the possible radioactive and non-labelled impurities, the stability of the label at different conditions and mediums, and some specific characteristics of radiopharmaceutical applicants eg.: receptor binding assays, antigen-antibody assays. But, still before human clinical trials there are several questions to be solved in regards of toxicology, radiotoxicology, radiation safety and maybe most importantly the efficacy tasks. All these issues cannot be answered without animal tests. Several decades back animal tests in radiopharmacy meant only standard bioassays in a large number of healthy rodents. Later on pathological models eg.: human tumor xenografts in immunodeficient animals came-out and through them radiopharmaceutical tumor-uptake by the targets were available to evaluate in vivo as well. Xenografts are still popular and widely used models in the field but instead of wide-scaled bioassays nowadays repeated scintiscans or hybrid images (SPECT/CT, PET/CT) are more and more often used to answer kinetic-, excretion-, tumor uptake, internal dosimetry (Minimum Effective Dose, Maximum Tolerable Dose, critical organ doses, tumor doses) questions. Greater animals like laboratory Beagles are more closely in size, clinical and metabolic parameters to the human objects so playing a more perfect role of human medical doctor and especially veterinary patients. Easy to understand that many of the spontaneously occurring companion animal diseases are a good model of human pathological diseases. The need of a better diagnosis and treatment of that animals meets with

  11. Use of UV-C radiation to disinfect non-critical patient care items: a laboratory assessment of the Nanoclave Cabinet

    Directory of Open Access Journals (Sweden)

    Moore Ginny

    2012-08-01

    Full Text Available Abstract Background The near-patient environment is often heavily contaminated, yet the decontamination of near-patient surfaces and equipment is often poor. The Nanoclave Cabinet produces large amounts of ultraviolet-C (UV-C radiation (53 W/m2 and is designed to rapidly disinfect individual items of clinical equipment. Controlled laboratory studies were conducted to assess its ability to eradicate a range of potential pathogens including Clostridium difficile spores and Adenovirus from different types of surface. Methods Each test surface was inoculated with known levels of vegetative bacteria (106 cfu/cm2, C. difficile spores (102-106 cfu/cm2 or Adenovirus (109 viral genomes, placed in the Nanoclave Cabinet and exposed for up to 6 minutes to the UV-C light source. Survival of bacterial contaminants was determined via conventional cultivation techniques. Degradation of viral DNA was determined via PCR. Results were compared to the number of colonies or level of DNA recovered from non-exposed control surfaces. Experiments were repeated to incorporate organic soils and to compare the efficacy of the Nanoclave Cabinet to that of antimicrobial wipes. Results After exposing 8 common non-critical patient care items to two 30-second UV-C irradiation cycles, bacterial numbers on 40 of 51 target sites were consistently reduced to below detectable levels (≥ 4.7 log10 reduction. Bacterial load was reduced but still persisted on other sites. Objects that proved difficult to disinfect using the Nanoclave Cabinet (e.g. blood pressure cuff were also difficult to disinfect using antimicrobial wipes. The efficacy of the Nanoclave Cabinet was not affected by the presence of organic soils. Clostridium difficile spores were more resistant to UV-C irradiation than vegetative bacteria. However, two 60-second irradiation cycles were sufficient to reduce the number of surface-associated spores from 103 cfu/cm2 to below detectable levels. A 3 log10 reduction in

  12. Laboratory for Calibration of Gamma Radiation Measurement Instruments (LabCal) of Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN) from Brazilian Army Technology Center (CTEx); Laboratorio de Calibracao de Instrumentode Medicao de Radiacao Gama (LabCal) do IDQBRN do CTEx

    Energy Technology Data Exchange (ETDEWEB)

    Amorim, Aneuri de; Balthar, Mario Cesar V.; Santos, Avelino; Vilela, Paulo Ricardo T. de; Oliveira, Luciano Santa Rita; Penha, Paulo Eduardo C. de Oliveira; Gonzaga, Roberto Neves; Andrade, Edson Ramos de; Oliveira, Celio Jorge Vasques de; Fagundes, Luiz Cesar S., E-mail: aneurideamorim@gmail.com [Centro Tecnologico do Exercito (DQBRN/CTEx), Rio de Janeiro, RJ (Brazil). Instituto de Defesa Quimica, Biologica, Radiologica e Nuclear

    2016-07-01

    This paper describes the calibration laboratory deployment steps (LABCAL) gamma ionizing radiation measuring instruments in the Army Technology Center, CTEx. Initially the calibration of radiation monitors will be held in the dosimetric quantity air kerma and operational quantity ambient dose equivalent H*(d). The LABCAL / CTEx has not yet authorized by CASEC / CNEN. This laboratory aims to calibrate the ionizing radiation instruments used by the Brazilian Army. (author)

  13. Progress in z-pinch driven dynamic-hohlraums for high-temperature radiation-flow and ICF experiments at Sandia National Laboratories

    International Nuclear Information System (INIS)

    Sanford, T W L; Nash, T J; Olson, R E; Bliss, D E; Lemke, R W; Olson, C L; Ruiz, C L; Mock, R C; Bailey, J E; Chandler, G A; Cuneo, M E; Leeper, R J; Matzen, M K; Mehlhorn, T A; Slutz, S A; Stygar, W A; Peterson, D L; Chrien, R E; Watt, R G; Roderick, N F; Cooper, G W; Apruzese, J P; Sarkisov, G S; Chittenden, J P; Haines, M G

    2004-01-01

    Progress in understanding the physics of dynamic-hohlraums is reviewed for a system capable of generating 13 TW of axial radiation for high temperature (>200 eV) radiation-flow experiments and ICF capsule implosions

  14. Laboratory Calibration of X-ray Velocimeters for Radiation Driven Winds and Outflows Surrounding X-ray Binaries and Active Galactic Nuclei

    Science.gov (United States)

    Brown, Gregory V.; Beiersdorfer, P.; Graf, A.; Hell, N.; Liedahl, D.; Magee, E. W.; Träbert, E.; Beilmann, C.; Bernitt, S.; Crespo-Lopez-Urritiua, J.; Eberle, S.; Kubicek, K.; Mäckel, V.; Rudolph, J.; Steinbrügge, R.; Ullrich, J.; Kelley, R. L.; Kilbourne, C. A.; Leutenegger, M.; Porter, F. S.; Rasmussen, A.; Simon, M.; Epp, S.

    2011-09-01

    High resolution measurements of X-ray absorption and fluorescence by radiation driven winds and outflows surrounding X-ray binaries and AGN provide a powerful means for measuring wind velocities. The accuracy of these X-ray velocimeters is limited by the accuracy of atomic data. For example, in the case of the high mass X-ray binary Vela X-1 the uncertainty in the calculated transition wavelengths of the K alpha lines produced by photoionization and photoexcitation of Si L-shell ions is comparable to the likely Doppler shifts, making it impossible to determine a reliable velocity. Similar problems also exist in the case of absorption of X-rays by M-shell Fe ions, which produces in some AGN the so-called unresolved transition array across the 15-17 angstrom band. In this case, there is a 15-45 milliangstrom variation among different wavelength calculations. The uncertainty in the calculations makes it impossible to reliably determine the true velocity structure of the outflow, and in turn, prevents a reliable determination of the mass-loss rate of the AGN. We present results of a recent series of laboratory experiments conducted using an electron beam ion trap coupled with the LCLS X-ray free electron laser and the BESSY-II synchrotron and designed to calibrate the velocimeters provided by high resolution instruments on Chandra and XMM-Newton. We also present results of resonant photoexcitation measurements of the transition wavelength of an Fe XVI satellite line 'coincident' with the 2p-3d Fe XVII line 3D at 15.26 angstroms. This line has never been resolved using emission spectroscopy and its measurement confirms the intensity of line 3D is sensitive to the relative abundance of Fe XVI and XVII and thus temperature. Work at LLNL was performed under the auspices of DOE under contract DE-AC53-07NA27344 and supported by NASA's APRA program.

  15. Development of groundwater treatment method using radiation-induced graft polymerization adsorbent at the Mizunami Underground Research Laboratory. Annual report on 2007 fiscal year (Joint research)

    International Nuclear Information System (INIS)

    Iyatomi, Yosuke; Shimada, Akiomi; Ogata, Nobuhisa; Sugihara, Kozo; Seko, Noriaki; Kasai, Noboru; Hoshina, Hiroyuki; Ueki, Yuji; Tamada, Masao

    2009-11-01

    The concentrations of fluorine (7.2-10mg/L) and boron (0.8-1.5mg/L) dissolved in groundwater pumped from shafts during excavation at the Mizunami Underground Research Laboratory (MIU), Tono Geoscience Centre, must be reduced to the levels below the environmental standards (fluorine:0.8mg/L, boron:1mg/L). Coagulation treatment and ion exchange treatment are applied for fluorine and boron at a current water treatment facility in MIU, respectively. A collaborative research on groundwater treatment for fluorine and boron was started by the Environment and Industrial Materials Research Division, Quantum Beam Science Directorate and the Tono Geoscientific Research Unit, Geological Isolation Research and Development Directorate in 2006. This is because the Quantum Beam Science Directorate has synthesized fibrous adsorbents with radiation-induced graft polymerization and applied them to collect rare metals dissolved in hot springs and sea water. Boron adsorbent synthesized by grafting showed higher removal rate than that of the ion-exchange resin. Additionally, the durability and the repetitive use of the boron adsorbent were evaluated to estimate the capacity of the boron adsorption. Therefore we produced a test equipment to do scale-up test of the adsorbent. Effects of flow rate and the repetitive use on the adsorption capacity of boron were investigated. As a result, it concluded that the adsorption capacity of the boron adsorbent did not change even when the flow rate increased from SV 50h -1 to 100h -1 . In addition, enough durability was confirmed for the repetitive use of the adsorbent. The adsorption capacity of the adsorbent was affected by pH of the groundwater especially in high alkaline range above a pH of 10. (author)

  16. Studies of acute and chronic radiation injury at the Biological and Medical Research Division, Argonne National Laboratory, 1970-1992: The JANUS Program Survival and Pathology Data

    International Nuclear Information System (INIS)

    Grahn, D.; Wright, B.J.; Carnes, B.A.; Williamson, F.S.; Fox, C.

    1995-02-01

    A research reactor for exclusive use in experimental radiobiology was designed and built at Argonne National Laboratory in the 1960's. It was located in a special addition to Building 202, which housed the Division of Biological and Medical Research. Its location assured easy access for all users to the animal facilities, and it was also near the existing gamma-irradiation facilities. The water-cooled, heterogeneous 200-kW(th) reactor, named JANUS, became the focal point for a range of radiobiological studies gathered under the rubic of open-quotes the JANUS programclose quotes. The program ran from about 1969 to 1992 and included research at all levels of biological organization, from subcellular to organism. More than a dozen moderate- to large-scale studies with the B6CF 1 mouse were carried out; these focused on the late effects of whole-body exposure to gamma rays or fission neutrons, in matching exposure regimes. In broad terms, these studies collected data on survival and on the pathology observed at death. A deliberate effort was made to establish the cause of death. This archieve describes these late-effects studies and their general findings. The database includes exposure parameters, time of death, and the gross pathology and histopathology in codified form. A series of appendices describes all pathology procedures and codes, treatment or irradiation codes, and the manner in which the data can be accessed in the ORACLE database management system. A series of tables also presents summaries of the individual experiments in terms of radiation quality, sample sizes at entry, mean survival times by sex, and number of gross pathology and histopathology records

  17. Studies of acute and chronic radiation injury at the Biological and Medical Research Division, Argonne National Laboratory, 1970-1992: The JANUS Program Survival and Pathology Data

    Energy Technology Data Exchange (ETDEWEB)

    Grahn, D.; Wright, B.J.; Carnes, B.A.; Williamson, F.S.; Fox, C.

    1995-02-01

    A research reactor for exclusive use in experimental radiobiology was designed and built at Argonne National Laboratory in the 1960`s. It was located in a special addition to Building 202, which housed the Division of Biological and Medical Research. Its location assured easy access for all users to the animal facilities, and it was also near the existing gamma-irradiation facilities. The water-cooled, heterogeneous 200-kW(th) reactor, named JANUS, became the focal point for a range of radiobiological studies gathered under the rubic of {open_quotes}the JANUS program{close_quotes}. The program ran from about 1969 to 1992 and included research at all levels of biological organization, from subcellular to organism. More than a dozen moderate- to large-scale studies with the B6CF{sub 1} mouse were carried out; these focused on the late effects of whole-body exposure to gamma rays or fission neutrons, in matching exposure regimes. In broad terms, these studies collected data on survival and on the pathology observed at death. A deliberate effort was made to establish the cause of death. This archieve describes these late-effects studies and their general findings. The database includes exposure parameters, time of death, and the gross pathology and histopathology in codified form. A series of appendices describes all pathology procedures and codes, treatment or irradiation codes, and the manner in which the data can be accessed in the ORACLE database management system. A series of tables also presents summaries of the individual experiments in terms of radiation quality, sample sizes at entry, mean survival times by sex, and number of gross pathology and histopathology records.

  18. Ionizing radiation

    International Nuclear Information System (INIS)

    Passchier, W.F.

    1988-01-01

    This report is part two from the series 'Future explorations' of the Dutch Counsil for Public Health. It contains contributions on biological effects of radiation in which information is presented on research into the occurrence of cancer in patients treated with radiotherapy and irradiated laboratory animals, on the effects of prenatal irradiation, and on the possibile, only in laboratory-animal research demonstrated, effects of irradiation in offspring of irradiated parents. In other contributions, which put the 'link' between the radiology and the practical radiation hygienics, it appears that the increased scientific knowledge does not make it easier to design radiation-hygienic standards and rules. (H.W.). refs.; figs.; tabs

  19. Experiences of a secondary laboratory of dosimetric calibration from the radiation protection and hygiene center CPHR in its first year of work and the procedures for quality assessment used in the calibration and quality control service

    International Nuclear Information System (INIS)

    Morales, J.A.; Campa, R.; Jova Sed, L.

    1996-01-01

    Experiences of a secondary laboratory of dosimetric calibration from the Radiation Protection and Hygiene Center (CPHR) in first year of work and the procedures for quality assessment used in the calibration and quality control service of radiotherapeutic equipment. For the yield calibration of the calibrated sources an ionometric method was used using ionizing chambers coupled to electrometers. Those determination were based on dosimetric American Association of Physicists in Medicine (AAPM)

  20. Establishment of qualities mammography according to the standard IEC-61267 in the laboratory of metrology of ionizing radiation of the National Center of Dosimetry and enlargement of the accreditation by ENAC

    International Nuclear Information System (INIS)

    Roig Petit, F.; Mestre de Juan, V.; Alabau Albors, J.; Palma Copete, J.; Ruiz Rodriguez, J. C.; Pons Mocholi, S.

    2013-01-01

    The extension of the accreditation of the laboratory of the National Center Dosimetry (No. 58/LC10.036) by the national accreditation entity (ENAC), according to the ISO 17025 standard [2], for the standard qualities of mammography by the IEC 61267 comes to meet part of the needs that demand our health care environment in terms of radiation measuring instruments calibration. This work intends to publicize this enlargement commenting on the different phases of the process to get the accreditation. (Author)

  1. Secondary standard dosimetry laboratory (SSDL)

    International Nuclear Information System (INIS)

    Md Saion bin Salikin.

    1983-01-01

    A secondary Standard Dosimetry Laboratory has been established in the Tun Ismail Research Centre, Malaysia as a national laboratory for reference and standardization purposes in the field of radiation dosimetry. This article gives brief accounts on the general information, development of the facility, programmes to be carried out as well as other information on the relevant aspects of the secondary standard dosimetry laboratory. (author)

  2. Health Physics Laboratory - Overview

    International Nuclear Information System (INIS)

    Olko, P.

    1999-01-01

    The activities of the Health Physics Laboratory at the Institute of Nuclear Physics in Cracow are principally research in the general area of radiation physics, and radiation protection of the employees of the Institute of Nuclear Physics. Theoretical research concerns modelling of radiation effects in radiation detectors and studies of concepts in radiation protection. Experimental research, in the general area of solid state dosimetry, is primarily concerned with thermoluminescence (TL) dosimetry, and more specifically: development of LiF:Mg, Ti for medical applications in conventional and hadron radiotherapy, and of LiF:Mg, Cu, P for low-level natural external ionising radiation. Environmental radiation measurements (radon in dwellings and in soil air) are also performed using track detectors. The Laboratory provides expert advice on radiation protection regulations at national and international levels. Routine work of the Health Physics Laboratory involves design and maintenance of an in-house developed TL-based personnel dosimetry system for over 200 radiation workers at the INP, monitoring and supervision of radiation safety on INP premises, and advising other INP laboratories on all matters pertaining to radiation safety. The year 1998 was another eventful year for the Health Physics Laboratory. In retrospective, the main effort in 1998 has been directed towards preparation and participation in the 12th International Conference on Solid State Dosimetry in Burgos, Spain. One of the research projects is aimed at developing novel miniature TLD detectors with improved LET and dose characteristics for precise phantom measurements in eye cancer radiotherapy with proton beams. The second project concerns the application of ultra-sensitive LiF:Mg, Cu, P (MCP-N) TLD detectors in environmental monitoring of gamma ionising radiation. The main objective of this last project is to develop and to test a system for rapid, short-term monitoring of environmental radiation

  3. Development of groundwater treatment methods using radiation-induced graft polymerization adsorbent at the Mizunami Underground Research Laboratory. Annual report for 2008 fiscal year (Joint research)

    International Nuclear Information System (INIS)

    Iyatomi, Yosuke; Shimada, Akiomi; Ogata, Nobuhisa; Sugihara, Kozo; Hoshina, Hiroyuki; Seko, Noriaki; Kasai, Noboru; Ueki, Yuji; Tamada, Masao

    2011-02-01

    The concentrations of fluorine (7.2-10mg/L) and boron (0.8-1.5mg/L) dissolved in groundwater pumped from the shafts during excavation of the Mizunami Underground Research Laboratory (MIU), Tono Geoscience Center, shall be reduced to levels below the environmental standards for fluorine: 0.8mg/L and boron: 1mg/L. Coagulation and ion exchange methods are being applied for fluorine and boron, respectively, at the operating water treatment facility at the MIU. As well, collaborative research on groundwater treatment started in 2006 between the Environmental and Industrial Materials Research Division, Quantum Beam Science Directorate and the Tono Geoscientific Research Unit, Geological Isolation Research and Development Directorate on a novel method to remove the fluorine and boron. The Quantum Beam Directorate has synthesized fibrous adsorbents with radiation-induced graft polymerization and applied the adsorbents to collect rare metals dissolved in hot springs and sea water. The results of previous testing indicated that the adsorbent was able to remove more than 95% of the boron and fluorine and that performance of adsorbent for boron removal was better than the performance using ion-exchange resin. It was also apparent that the pH of groundwater had an influence on the performance of the adsorbent with respect to boron removal. Therefore we reran the recycling tests using groundwater from the neutralization tank at the groundwater treatment facility were repeated. The results indicated that the performance of the adsorbent using neutral groundwater for boron removal was higher than using uncontrolled groundwater. However the bed volume (BV) with recycled adsorbent decreased compared to first use. It is thought that sulfur added at the groundwater treatment facility was retained by the adsorbent despite elution, and affected the performance such that repeat usage resulted in decreased efficiency. In addition, it is considered that the goals established in the first

  4. Photometrics Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — Purpose:The Photometrics Laboratory provides the capability to measure, analyze and characterize radiometric and photometric properties of light sources and filters,...

  5. Blackroom Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Enables evaluation and characterization of materials ranging from the ultraviolet to the longwave infrared (LWIR).DESCRIPTION: The Blackroom Laboratory is...

  6. Experimental comparison among the laboratories accredited within the framework of the European Co-operation for Accreditation on the calibration of a radiation protection dosimeters in the terms of the quantity air Kerma

    International Nuclear Information System (INIS)

    Bovi, M.; Toni, M.P.; Tricomi, G.

    2002-01-01

    The European co-operation for Accreditation (EA) formalises the collaboration of the Accreditation Bodies of the Member States of the European Union and the European Free Trade Association covering all conformity assessment activities. This collaboration is based on a Memorandum of Understanding dated the 27 November 1997 and aims at developing and maintain Multilateral Agreements (MLAs) within EA and with non-members accreditation bodies. MLAs Signatories guarantee uniformity of accreditation by continuous and rigorous evaluation. Based on mutual confidence, the MLAs recognise the equivalence of the accreditation systems administered by EA Members and of certificates and reports issued by bodies accredited under these systems. A basic element of the program to establish and maintain mutual confidence among calibration services is the participation of the accredited laboratories in experimental interlaboratory comparisons (ILC) organised by EA members or other international organisations. The aim of these ILC is to verify the technical equivalence of calibration services within the EA. The ILC which it is dealt with in the present work was recently carried out over a period of two years, ending in May 2002. It interested the laboratories accredited in the ionising radiation field for calibration of dosimeters at radiation protection levels in terms of the quantity air kerma (K air ) due to 6 0C o and 1 37C s gamma radiation. The ILC was planned by the EA expert group on Ionising radiation and radioactivity and approved by the EA General Assembly in December 1999 with the title Calibration of a Radiation Protection Dosimeter under the code IR3. The need of this comparison also resulted from an inquiry carried out in 1998 by the expert group among the different Accreditation Bodies members of EA and associated to EA. The organization of the ILC was carried out according to the EA rules by the Italian Accreditation Body in the ionising radiation field, the SIT

  7. Efficacy of the RADPAD Protection Drape in Reducing Operators' Radiation Exposure in the Catheterization Laboratory: A Sham-Controlled Randomized Trial

    NARCIS (Netherlands)

    Vlastra, Wieneke; Delewi, Ronak; Sjauw, Krischan D.; Beijk, Marcel A.; Claessen, Bimmer E.; Streekstra, Geert J.; Bekker, Robbert J.; van Hattum, Juliette C.; Wykrzykowska, Joanna J.; Vis, Marije M.; Koch, Karel T.; de Winter, Robbert J.; Piek, Jan J.; Henriques, José P. S.

    2017-01-01

    Background Interventional cardiologists are increasingly exposed to radiation-induced diseases like cataract and the stochastic risk of left-sided brain tumors. The RADPAD is a sterile, disposable, lead-free shield placed on the patient with the aim to minimize operator-received scatter radiation.

  8. Evaluation of ambient radiation levels in positron emission tomography/computed tomography in microPET/CT laboratory; Avaliacao dos niveis de radiacao ambiental no laboratorio de tomografia por emissao de positrons acoplada a tomografia computadorizada, microPET/CT

    Energy Technology Data Exchange (ETDEWEB)

    Sarmento, Daniele Martins

    2016-11-01

    Micro PET/CT scanner is an essential tool generally used for small animal molecular imaging. Fluorine-18-labeled fluorodeoxyglucose is the most widely used radioisotope in this technique. The present study aimed to evaluate the radiation levels in a micro PET/CT research laboratory of the Radiopharmacy Center at IPEN-CNEN / SP, in order to accomplish both national standards and international recommendations. The radioprotection team has classified the laboratory as supervised area; even this laboratory does not require the adoption of specific measures for protection and safety, should be done regular re-evaluation of the conditions of occupational exposures. Workplace monitoring and individual control assessment were carried out to ensure the radiological protection of all workers directly involved in handling the scanner. Initially, there was conducted a radiometric survey, as well as measurements of the external radiation level in the workplace and its surroundings. To achieve this goal, there were placed nine thermoluminescent dosimeters of CaSO{sub 4}:Dy in preselected locations. Monthly evaluations of the occupationally exposed individuals were carried out through the use of TL dosimeters, ported in the workers' chest. Moreover, whole body measurements were performed every six months. The study period was about two-years which started in April 2014. All tests to evaluate micro PET/CT performance were based on the standard protocol of the equipment in accordance with the standard developed by the Animal PET Standard Task Force. Present study's results demonstrated that the ambient radiation levels (ambient and effective estimated radiation dose), as well as the effective shielding equipment are both adequate. This study emphasizes that it is essential to strictly follow the principles of radioprotection in workplace, whenever researches involve radioactive unsealed sources. (author)

  9. Practical radiation protection for radiography

    International Nuclear Information System (INIS)

    Hubbard, S.K.; Proudfoot, E.A.

    1978-01-01

    Nondestructive Testing Applications and Radiological Engineering at the Hanford Engineering Development Laboratory have developed radiation protection procedures, radiation work procedures, and safe practice procedures to assure safe operation for all radiographic work. The following topics are discussed: training in radiation safety; radiation exposure due to operations at Hanford; safeguards employed in laboratory radiography; field radiographic operations; and problems

  10. Health Physics Laboratory - Overview

    International Nuclear Information System (INIS)

    Olko, P.

    2002-01-01

    Full text: The activities of the Health Physics Laboratory at the Institute of Nuclear Physics (IFJ) in Cracow are principally research in the general area of radiation physics, dosimetry and radiation protection of the employees of the Institute. Theoretical research concerns modelling of radiation effects in radiation detectors and studies of concepts in radiation protection. Experimental research, in the general area of solid state dosimetry, is primarily concerned with thermoluminescence (TL) dosimetry, and more specifically: development of LiF:Mg, Ti, CaF 2 :Tm and CVD diamond detectors for medical applications in conventional and hadron radiotherapy and of LiF:Mg, Cu, P and LiF:Mg, Cu, Si, Na for low-level natural external ionising radiation. Environmental radiation measurements (cosmic-rays on aircraft and radon in dwellings and soil) are also performed using track CR-39 and TLD detectors. The Laboratory provides expert advice on radiation protection regulations at national and international levels. Routine work of the Health Physics Laboratory involves design and maintenance of an in-house developed TL-based personnel dosimetry system for over 200 radiation workers at the INP, supervision of radiation safety on IFJ premises, and advising other INP laboratories on all matters pertaining to radiation safety. We provide personal and environmental TLD dosimetry services for several customers outside the IFJ, mainly in hospitals and nuclear research institutes in Poland. We also calibrate radiation protection instruments (400 per year) for customers in the southern region of Poland. The year 2001 was another eventful year for the Health Physics Laboratory. M. Waligorski has received his Professor of Physics state nomination from A. Kwasniewski, the President of Poland. P. Bilski and M. Budzanowski were granted their Ph.D. degrees by the Scientific Council of the Institute of Nuclear Physics. We continued several national and international research projects. Dr

  11. Studies on assessment of health effects of radiation processed foods: Part 1. genetic toxicological evaluation in somatic and germ cells of laboratory animals

    Energy Technology Data Exchange (ETDEWEB)

    Chaubey, R C; Aravindakshan, M; Chauhan, P S [Genetic Toxicology and Chromosome Studies Section, Cell Biology Div., Bhabha Atomic Research Centre, Mumbai (India)

    1999-09-01

    The studies summarized in this report form a part of the program on the safety evaluation of radiation-processed foods, an important component of the development of radiation technology for food preservation from the public health point of view. These studies contributed significantly and critically to the acceptance of safety of radiation processed foods by regulatory agencies both at the national and international levels. This report contains only genetic studies, one aspect of this program, while the remaining studies will be summarized in a separate report.

  12. Studies on assessment of health effects of radiation processed foods: Part 1. genetic toxicological evaluation in somatic and germ cells of laboratory animals

    International Nuclear Information System (INIS)

    Chaubey, R.C.; Aravindakshan, M.; Chauhan, P.S.

    1999-09-01

    The studies summarized in this report form a part of the program on the safety evaluation of radiation-processed foods, an important component of the development of radiation technology for food preservation from the public health point of view. These studies contributed significantly and critically to the acceptance of safety of radiation processed foods by regulatory agencies both at the national and international levels. This report contains only genetic studies, one aspect of this program, while the remaining studies will be summarized in a separate report

  13. Radiation safety at CERN

    Energy Technology Data Exchange (ETDEWEB)

    Hoefert, M [CERN, Geneva (Switzerland)

    1995-09-01

    CERN, the European Laboratory for Particle Physics, operates proton accelerators up to an energy of 450 GeV and an electron-positron storage ring in the 50 GeV energy range for fundamental high-energy particle physics. A strong radiation protection group assures the radiation safety of these machines both during their operation and in periods of maintenance and repair. Particular radiation problems in an accelerator laboratory are presented and recent developments in radiation protection at CERN discussed. (author)

  14. Cytogenetic, cellular, and developmental responses in antarctic sea urchins (Sterechinus neumayeri) following laboratory ultraviolet-B and ambient solar radiation exposures

    International Nuclear Information System (INIS)

    Anderson, S.; Hoffman, J.; Wild, G.; Bosch, I.; Karentz, D.

    1993-01-01

    Increasing ultraviolet-B radiation as a consequence of springtime ozone depletion, could harm antarctic ecosystems. This study uses several techniques for studying genotoxic effects to evaluate UV-B effects in sea urchins from Antarctica. 6 refs., 2 figs

  15. The influence of background radiation in the Chernobyl exclusion zone on morphofunctional state and antitumor resistance of laboratory animals and their descendants

    International Nuclear Information System (INIS)

    Savin, A. O.; Sushko, S. N.; Kadukova, E. M.

    2012-01-01

    The purpose of the work is defined the consequences of prolonged exposure of laboratory mice Af their exposure in the Chernobyl exclusion zone on the spontaneous and chemically induced mutagenesis and changes in the blood cells. (authors)

  16. Synchrotron radiation

    International Nuclear Information System (INIS)

    Poole, M.W.; Lea, K.R.

    1982-01-01

    A report is given on the work involving the Synchrotron Radiation Division of the Daresbury Laboratory during the period January 1981 - March 1982. Development of the source, beamlines and experimental stations is described. Progress reports from individual investigators are presented which reveal the general diversity and interdisciplinary nature of the research which benefits from access to synchrotron radiation and the associated facilities. Information is given on the organisation of the Division and publications written by the staff are listed. (U.K.)

  17. Early days in the Lawrence Laboratory

    International Nuclear Information System (INIS)

    McMillan, E.M.

    1976-10-01

    Events at the Lawrence Radiation Laboratory at Berkeley to the end of 1940 are recalled. Radiation detection, discovery of new isotopes and elements, and accelerators are among the subjects included. 29 photographs

  18. CSU-FDA (Colorado State Univ.-Food and Drug Administration) Collaborative Radiological Health Laboratory. Annual report - 1982: health effects of prenatal and postnatal whole-body exposure to ionizing radiation in the beagle dog

    International Nuclear Information System (INIS)

    Benjamin, S.A.

    1984-09-01

    The Collaborative Radiological Health Laboratory was established in 1962 by the U.S. Public Health Service and Colorado State University for the purpose of determining in a carefully controlled animal experiment the life-time hazards associated with prenatal and early postnatal exposure to ionizing radiation. The CRHL study is designed to provide information that will facilitate the evaluation of risks to human beings from medical exposure during early development. The study is a long-term (lifespan) study of a moderately large and long-lived mammal exposed at one of several times during development to a relatively small and discrete dose of external radiation. Ages at irradiation selected for comparison reflect the primary concern with medical exposures during the development period. This annual report summarizes the current status of the study for the reporting period of January 1 through December 31, 1982

  19. Remaining Sites Verification Package for the 100-F-36, 108-F Biological Laboratory, and for the 116-F-15, 108-F Radiation Crib. Attachment to Waste Site Reclassification Form 2007-002 and 2007-003

    International Nuclear Information System (INIS)

    Dittmer, L.M.

    2007-01-01

    The 116-F-15 waste site is the former location of the 108-F Radiation Crib that was located in the first floor of the 108-F Biological Laboratory. In accordance with this evaluation, the verification sampling results support a reclassification of this site to Interim Closed Out. The current site conditions achieve the remedial action objectives and the corresponding remedial action goals established in the Remaining Sites ROD. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River

  20. Computational Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — This laboratory contains a number of commercial off-the-shelf and in-house software packages allowing for both statistical analysis as well as mathematical modeling...

  1. Geomechanics Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Geomechanics Laboratory allows its users to measure rock properties under a wide range of simulated service conditions up to very high pressures and complex load...

  2. Instruments for radiation measurement in life sciences (5). 'Development of imaging Technology in life sciences'. 5. X-ray CT for laboratory animals

    International Nuclear Information System (INIS)

    Tamegai, Toshiaki

    2007-01-01

    X-ray computed tomography, commercialized by EMI Co., UK, in 1973 and now used world-widely, is used not only for medical use but also for laboratory animals such as rats and mice to measure bone density and to obtain fine structures of bones. This paper introduces X-ray CT apparatus specifically designed for laboratory animals. Besides general explanations about the method, followed by emphasis on important performance of the measuring system, the paper explains technical aspects for obtaining the CT imaging scan procedure thus showing several photographs as example and introducing some clinical applications. (S. Ohno)

  3. Synchrotron radiation

    CERN Document Server

    Kunz, C

    1974-01-01

    The production of synchrotron radiation as a by-product of circular high-energy electron (positron) accelerators or storage rings is briefly discussed. A listing of existing or planned synchrotron radiation laboratories is included. The following properties are discussed: spectrum, collimation, polarization, and intensity; a short comparison with other sources (lasers and X-ray tubes) is also given. The remainder of the paper describes the experimental installations at the Deutsches Elektronen-Synchrotron (DESY) and DORIS storage rings, presents a few typical examples out of the fields of atomic, molecular, and solid-state spectroscopy, and finishes with an outlook on the use of synchrotron radiation in molecular biology. (21 refs).

  4. Preparative radiation chemistry

    International Nuclear Information System (INIS)

    Drawe, H.

    1978-01-01

    Preparative synthesis of compounds with the aid of radiation chemistry is increasingly used in laboratories as well as on a technical scale. A large number of new compounds has been produced with the methods of radiation chemistry. With the increasing number of available radiation sources, also the number of synthesis metods in radiation chemistry has increased. This paper can only briefly mention the many possible ways of synthesis in radiation chemistry. (orig./HK) [de

  5. Itinerant radiometric laboratory (IRL-76)

    International Nuclear Information System (INIS)

    Dolgirev, E.I.; Domaratskij, V.P.; Kostikov, Yu.I.

    1978-01-01

    A mobile radiometric laboratory for routine radiation monitoring of the environment, personnel, and population is described. As compared to the previous models, this one incorporates a number of new features and is more informative and versatile. The design and main technical and operating characteristics of the laboratory are detailed

  6. (Re)implantation of quality system of LCR (Laboratory for Radiation Sciences) for accreditation in the standard ABNT NBR ISO/IEC 17025:2005; (Re)implantacao do sistema da qualidade do LCR para acreditacao na ABNT NBR ISO/IEC 17025:2005

    Energy Technology Data Exchange (ETDEWEB)

    Leite, Sandro P., E-mail: leite_sp@ig.com.br [Rede Sibratec, Sao Paulo, SP (Brazil); Fernandes, Elisabeth O.; David, Mariano G.; Pires, Evandro J.; Alves, Carlos F.E.; Almeida, Carlos E. [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil)

    2014-07-01

    This paper presents preparing procedure of the metrology laboratory (LABMETRO), which belongs Laboratorio de Ciencias Radiologicas of Rio de Janeiro , for postulating accreditation of its services metrology to INMETRO. This process, supported by the Technological Services Network SIBRATEC/FINEP for Radiation Protection and Dosimetry Technological Services, had as one of its aims to avoid possible technical barriers to the purchase services in the area of ionizing radiation laboratories. Accreditation will also enable the integration of services such laboratories in Brazilian Calibration Network (RBC). (author)

  7. Radiological design of hot laboratories

    International Nuclear Information System (INIS)

    Unruh, C.M.

    1976-04-01

    The fundamental design objectives for a laboratory where work with highly radioactive and highly toxic materials, such as plutonium and transplutonium nuclides, is performed are (1) to accomplish the purpose of the laboratory; (2) to protect the environment, (3) to provide safe working conditions; and (4) to keep radiation exposure to staff as low as practicable. The major planning and design features of a well engineered plutonium or transplutonium laboratory are given

  8. Radiological design of hot laboratories

    International Nuclear Information System (INIS)

    Unruh, C.M.

    1976-01-01

    The fundamental design objectives for a laboratory where work with highly radioactive and highly toxic materials, such as plutonium and transplutonium nuclides, is performed, are (1) to accomplish the purpose of the laboratory, (2) to protect the environment, (3) to provide safe working conditions, and (4) to keep radiation exposure to staff as low as practicable. The major planning and design features of well-engineered plutonium or transplutonium laboratory are given. (author)

  9. DOSIS & DOSIS 3D: radiation measurements with the DOSTEL instruments onboard the Columbus Laboratory of the ISS in the years 2009-2016

    Czech Academy of Sciences Publication Activity Database

    Berger, T.; Burmeister, S.; Matthiae, D.; Przybyla, B.; Reitz, G.; Bilski, P.; Hajek, M.; Sihver, L.; Szabó, J.; Ambrožová, Iva; Vanhavere, F.; Gaza, R.; Semones, E.; Yukihara, E. G.; Benton, E.; Uchihori, Y.; Kodaira, S.; Kitamura, H.; Böhme, M.

    2017-01-01

    Roč. 7, MAR (2017), č. článku A8. ISSN 2115-7251 R&D Projects: GA ČR GJ15-16622Y Institutional support: RVO:61389005 Keywords : International Space Station * Columbus * space radiation * DOSTEL * DOSIS 3D Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics OBOR OECD: Astronomy (including astrophysics, space science) Impact factor: 2.446, year: 2016

  10. Accident with radioactive substances in laboratory. An exercise during the education of persons in radiation protection, who are working with open radioactive sources

    International Nuclear Information System (INIS)

    Stolze, B.

    2003-01-01

    In spite of carefulness it is possible,that contamination occur by handling unscaled radioactive sources or in case of an accident. It is demonstrated in an exercise managing an accident with unscaled radioactive sources. The persons, who are educated in radiation protection for handling unsealed radioactive sources, must have knowledge of theoretical regulations of the radiation protection law and of the limits in radiation protection. Also they have to know the handling to reduce possible contamination. They have to be able to calculate the dose of skin contamination. In my lecture I give some information on regulations of accidents with radioactive sources in Germany and a scenario of an accident and I explain, what is to do to manage this event. A person opened an ampoule. The activity splashed and contaminated the person's hand, arm and face. Also in the room there was a contamination. The desk and the floor were contaminated. There were 50 MBq P-32 as NaH 2 P''32O 3 in water solution, I give a report on practices in our courses, which the participants have to do. The radiological experts have to decontaminate the skin and they have to calculate the skin-dose and to give the information to the authorities. (Author) 4 refs

  11. Physics laboratory 2

    International Nuclear Information System (INIS)

    1980-01-01

    The report covers the research activities of the Physics laboratory of H.C. Oersted Institute, University of Copenhagen in the period January 1, 1976 - January 1, 1979. It gives also an idea about the teaching carried out by yhe laboratory. The research - broadly speaking - deals mainly with the interaction of particles (ions, electrons and neutrons) and electromagnetic radiation (X-rays) with matter. Use is made in studies of: atomic physics, radiation effects, surface physics, the electronic and crystallographic structure of matter and some biological problems. The research is carried out partly in the laboratory itself and partly at and in collaboration with other institutes in this country (H.C. Oersted Institute, Chemical Laboratories, Denmark's Technical University, Aarhus University, Institute of Physics and Risoe National Laboratory) and abroad (Federal Republic of Germany, France, India, Sweden, U.K., U.S.A. and U.S.S.R.). All these institutes are listed in the abstract titles. Bibliography comprehends 94 publications. A substantial part of the research is supported by the Danish Natural Sciences Research Council. (author)

  12. Laboratory Building

    Energy Technology Data Exchange (ETDEWEB)

    Herrera, Joshua M. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-03-01

    This report is an analysis of the means of egress and life safety requirements for the laboratory building. The building is located at Sandia National Laboratories (SNL) in Albuquerque, NM. The report includes a prescriptive-based analysis as well as a performance-based analysis. Following the analysis are appendices which contain maps of the laboratory building used throughout the analysis. The top of all the maps is assumed to be north.

  13. Chemistry Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — Purpose: To conduct fundamental studies of highway materials aimed at understanding both failure mechanisms and superior performance. New standard test methods are...

  14. Montlake Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The NWFSC conducts critical fisheries science research at its headquarters in Seattle, WA and at five research stations throughout Washington and Oregon. The unique...

  15. Dynamics Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Dynamics Lab replicates vibration environments for every Navy platform. Testing performed includes: Flight Clearance, Component Improvement, Qualification, Life...

  16. Psychology Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — This facility provides testing stations for computer-based assessment of cognitive and behavioral Warfighter performance. This 500 square foot configurable space can...

  17. Visualization Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Evaluates and improves the operational effectiveness of existing and emerging electronic warfare systems. By analyzing and visualizing simulation results...

  18. Analytical Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Analytical Labspecializes in Oil and Hydraulic Fluid Analysis, Identification of Unknown Materials, Engineering Investigations, Qualification Testing (to support...

  19. Propulsion Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Propulsion Lab simulates field test conditions in a controlled environment, using standardized or customized test procedures. The Propulsion Lab's 11 cells can...

  20. Radiation protection seminar

    International Nuclear Information System (INIS)

    2012-01-01

    The Radiation Protection Seminar, was organized by the Argentina Association of Biology and Nuclear Medicine, and Bacon Laboratory, the 20 june 2012, in the Buenos Aires city of Argentina. In this event were presented some papers on the following topics: methods of decontamination, radiation protection of patients; concepts of radiation protection and dosimetry.

  1. Tour of the Standards and Calibrations Laboratory

    International Nuclear Information System (INIS)

    Elliott, J.H.

    1978-01-01

    This tour of Lawrence Livermore Laboratory's Standards and Calibrations Laboratory is intended as a guide to the capabilities of and services offered by this unique laboratory. Described are the Laboratory's ability to provide radiation fields and measurements for dosimeters, survey instruments, spectrometers, and sources and its available equipment and facilities. The tour also includes a survey of some Health Physics and interdepartmental programs supported by the Standards and Calibrations Laboratory and a listing of applicable publications

  2. A 2D MWPC area detector for use with synchrotron X-radiation at the Daresbury Laboratory for small angle diffraction and scattering

    International Nuclear Information System (INIS)

    Helliwell, J.R.; Hughes, G.; Przybylski, M.M.; Ridley, P.A.; Sumner, I.; Bateman, J.E.; Connolly, J.F.; Stephenson, R.

    1982-01-01

    A 2D multiwire proportional chamber area detector is being developed to provide a real time data acquisition system for small angle scattering and diffraction experiments with synchrotron X-radiation at the Daresbury synchrotron radiation source (SRS). The chamber has a circular aperture, 200 mm diameter with an anode and cathode wire pitch of 1 mm; a front cathode-anode spacing of 6 mm and a 6 mm spacing between anode and rear cathode. A 1 mm thick front beryllium window and a rear aluminium cover plate with indium seals provide a gas-tight system. Previous experiments with a similar chamber design allowed continual use of the chamber for up to 2 years without refill. A digitising time of 2 μs is expected based on a 260 mm delay line and Lecroy TDC linked to a mass semiconductor memory of 512 x 256 elements. The experiment will be controlled by a PDP 11/04 computer with 28 K memory interfaced to a CAMAC create with 64 K fast access CAMAC memory. The system should be relatively easy to use with good order to order resolution and reasonable rate for small angle diffraction and scattering experiments on biological systems. Evaluation of the set-up for protein crystallography is planned though a TV based image intensifier (Enraf-Nonius) is preferred for this application at the SRS. (orig.)

  3. Mean frequency and relative fluorescence intensity measurement of γ-H2AX foci dose response in PBL exposed to γ-irradiation: An inter- and intra-laboratory comparison and its relevance for radiation triage.

    Science.gov (United States)

    Venkateswarlu, Raavi; Tamizh, Selvan G; Bhavani, Manivannan; Kumar, Arun; Alok, Amit; Karthik, Kanagaraj; Kalra, Namita; Vijayalakshmi, J; Paul, Solomon F D; Chaudhury, N K; Venkatachalam, Perumal

    2015-12-01

    Measurement of γ-H2AX protein changes in the peripheral blood lymphocytes (PBL) of individuals exposed to ionizing radiation is a simple, sensitive, and rapid assay for radiation triage and early marker of dose estimation. The qualitative and quantitative measurements of the protein changes were examined using flow cytometry and microscopy. Whole blood and isolated lymphocytes were exposed in vitro between 0.1 and 5 Gy doses of (60) Co γ-radiation at a dose rate of 1 Gy/min. Radiation induced γ-H2AX foci frequency (n = 3) and relative fluorescence intensity (n = 7) in PBL was measured at 0.5 and 2 hrs postexposure. The observed dose response for γ-H2AX foci frequency at both time points, for whole blood and isolated lymphocytes did not show any significant (P > 0.05) differences. However, when compared with γ-H2AX foci frequency scored manually (microscopy), the semiautomated analysis (captured images) showed a better correlation (r(2) = 0.918) than that obtained with automated (Metafer) scoring (r(2) = 0.690). It is noteworthy to mention that, the γ-H2AX foci frequency quantified using microscopy showed a dose dependent increase up to 2 Gy and the relative fluorescence intensity (RFI) measured with flow cytometry revealed an increase up to 5 Gy in the PBL exposed in vitro. Moreover, a better correlation was observed between the γ-H2AX foci frequency obtained by manual scoring and RFI (r(2) = 0.910). Kinetic studies showed that the γ-H2AX foci remain more or less unchanged up to 4 hrs and reduces gradually over 48 hrs of postexposure at 37°C. Further, inter and intra-laboratory comparisons showed consistency in the scoring of γ-H2AX foci frequency by manual and semiautomated scoring. The overall results suggest that measurement of γ-H2AX (microscopy and flow cytometry) should be employed within 4 to 6 hrs for a reliable dosimetry either by sharing the work load between the laboratories or investing more manpower; however, triage can be possible even up

  4. Linear Accelerator Laboratory

    International Nuclear Information System (INIS)

    1976-01-01

    This report covers the activity of the Linear Accelerator Laboratory during the period June 1974-June 1976. The activity of the Laboratory is essentially centered on high energy physics. The main activities were: experiments performed with the colliding rings (ACO), construction of the new colliding rings and beginning of the work at higher energy (DCI), bubble chamber experiments with the CERN PS neutrino beam, counter experiments with CERN's PS and setting-up of equipment for new experiments with CERN's SPS. During this period a project has also been prepared for an experiment with the new PETRA colliding ring at Hamburg. On the other hand, intense collaboration with the LURE Laboratory, using the electron synchrotron radiation emitted by ACO and DCI, has been developed [fr

  5. Calculation of collective effects and beam lifetimes for the LBL [Lawrence Berkeley Laboratory] 1-2 GeV synchrotron radiation source

    International Nuclear Information System (INIS)

    Chattopadhyay, S.; Zisman, M.S.

    1987-03-01

    In designing a third-generation high brightness synchrotron radiation source, attention must be paid to the various collective effects that can influence beam performance. We report on calculations, performed with the code ZAP, of the bunch length, the transverse emittance and the beam lifetime (from both Touschek and gas scattering) for our 1-2 GeV storage ring. In addition, we estimate the growth times for both longitudinal and transverse coupled bunch instabilities. Bunch lengths of about 20 ps should be obtainable and intrabeam scattering emittance growth is small. For a limiting undulator gap of 1 cm and residual gas pressure of 1n Torr, the beam lifetime is about 5 hours in the single-bunch mode; in the multibunch mode, lifetimes in excess of 6 hours are expected. These results indicate that all performance goals for the facility should be achievable

  6. Radiation degradation of biological waste (aflatoxins) produced in food laboratory; Degradacao por radiacao de residuos biologicos (aflatoxinas) produzidos em laboratorio de alimentos

    Energy Technology Data Exchange (ETDEWEB)

    Rogovschi, Vladimir Dias

    2009-07-01

    Many filamentous fungi can produce secondary metabolites, called mycotoxins, which can be found in food and agricultural products. One of the main genera of myco toxigenic fungi related to the food chain is the Aspergillus spp. There are over 400 mycotoxins described in the literature, the most common the aflatoxins B1, B2, G1 and G2. The mycotoxins are commonly found in foods and are considered one of the most dangerous contaminants. The aflatoxin B1 is classified in group one by the International Agency of Research on Cancer. Aflatoxins resisting for more than one hour in autoclave making it necessary to other means of degradation of these toxins. This work aimed to observe the effects of gamma radiation of {sup 60}Co and electron beams in the degradation of aflatoxins and compare the damage caused on the morphology of the Aspergillus flavus. The fungus was grown on potato dextrose agar (PDA) for 10 days and was subsequently transferred to coconut agar medium, and maintained for 14 days at 25 degree C. After this step the coconut agar was ground to become a homogeneous pasty and was irradiated with doses of 2.5, 5.0, 10 and 20 kGy. The samples used in scanning electron microscopy were irradiated with doses of 0, 2.5, 5.0, 10 and 20 kGy with sources of {sup 60}Co and electron beams. Irradiation with electron accelerator showed a slightly higher degradation to gamma radiation, reducing 29.93 %, 34.50 %, 52.63 % and 72.30 % for doses of 2.5, 5.0, 10 and 20 kGy, respectively. The Scanning Electron Microscopy showed that doses of 2.5 to 10 kGy did not cause damage to the fungus, but with a dose of 20 kGy it can be observed fungal damage to structures. (author)

  7. Optimization of shadow cone length and mass for determination the amount of scattered radiation dose in the calibration laboratory of Am/Be neutron source

    International Nuclear Information System (INIS)

    Raisali, G.; Hamidi, S.; Hallajfard, E.; Shahvar, A.; Hajiloo, N.

    2007-01-01

    The shadow cone technique is one of the methods which is used for determining the contribution of scattered particles on the response of neutron detectors. This technique is used for neutron field calibration in Agriculture, Medicine and Industry Research School. In this investigation, we have designed and constructed an optimized shadow cone. According to the calculated neutron dose equivalent attenuation factors, a cone with 20 cm of iron and 30 cm of polyethylene has been found as optimum. For this cone, the neutron dose equivalent attenuation factor for 241 Am/Be neutron source, is 0.00035 for which the contribution of scattered neutrons in Agriculture, Medicine and Industry Research School neutron calibration laboratory according to the calculation and measurement results, can be evaluated with less than 0.5% of error

  8. Radiation safety

    International Nuclear Information System (INIS)

    Auxier, J.A.

    1977-01-01

    Data available on the biological effects of radiation on man are reviewed, with emphasis on dose response to low LET and high LET radiation sources, and the effects of dose rate. Existing guides for radiation protection were formulated largely on the basis of tumor induction in the bone of radium dial painters, but the ICRP/NCRP annual dose guides of 5 rem/yr are of the same general magnitude as the doses received in several parts of the world from the natural radiation environment. Because of the greater sensitivity of rapidly dividing cells and the assumption that radiation occupations would not begin before the age of eighteen, maximum exposure levels were set as 5 (N-18) rem/yr, where N is the exposed worker's age in years. However, in the case of the natural radiation environment, exposure commences, in a sense, with the exposure of the ovum of the individual's mother; and the ovum is formed during the fetal development of the mother. In occupational exposures, the professional health physicist has always practiced the as low as practical philosophy, and exposures have generally averaged far below the guidelines. The average annual exposure of the radiation worker in modern plants and laboratories is approximately equal to the average natural radiation environment exposure rate and far lower than the natural radiation environment in many parts of the world. There are numerous complications and uncertainties in quantifying radiation effects on humans, however, the greatest is that due to having to extrapolate from high dose levels at which effects have been measured and quantified, to low levels at which most exposures occur but at which no effects have been observed

  9. Radiation safety

    International Nuclear Information System (INIS)

    Van Riessen, A.

    2002-01-01

    Full text: Experience has shown that modem, fully enclosed, XRF and XRD units are generally safe. This experience may lead to complacency and ultimately a lowering of standards which may lead to accidents. Maintaining awareness of radiation safety issues is thus an important role for all radiation safety officers. With the ongoing progress in technology, a greater number of radiation workers are more likely to use a range of instruments/techniques - eg portable XRF, neutron beam analysis, and synchrotron radiation analysis. The source for each of these types of analyses is different and necessitates an understanding of the associated dangers as well as use of specific radiation badges. The trend of 'suitcase science' is resulting in scientists receiving doses from a range of instruments and facilities with no coordinated approach to obtain an integrated dose reading for an individual. This aspect of radiation safety needs urgent attention. Within Australia a divide is springing up between those who work on Commonwealth property and those who work on State property. For example a university staff member may operate irradiating equipment on a University campus and then go to a CSIRO laboratory to operate similar equipment. While at the University State regulations apply and while at CSIRO Commonwealth regulations apply. Does this individual require two badges? Is there a need to obtain two licences? The application of two sets of regulations causes unnecessary confusion and increases the workload of radiation safety officers. Radiation safety officers need to introduce risk management strategies to ensure that both existing and new procedures result in risk minimisation. A component of this strategy includes ongoing education and revising of regulations. AXAA may choose to contribute to both of these activities as a service to its members as well as raising the level of radiation safety for all radiation workers. Copyright (2002) Australian X-ray Analytical

  10. CRCPD`S laboratory accrediation program

    Energy Technology Data Exchange (ETDEWEB)

    Dukes, P.M. [South Carolina Department of Health and Environmental Control, Columbia, SC (United States)

    1993-12-31

    The Conference of Radiation Control Program Directors, or CRCPD, first became involved in a calibration laboratory accreditation program about 17 years ago. Since that time, the CRCPD has formed a Committee on Ionizing Measurements which writes criteria for the accreditation of laboratories, and performs the accreditation review process. To become accredited, a laboratory must agree to an administrative review, and an onsite review, and participate in measurement quality assurance (MQA) testing with the National Institute of Standards and Technology (NIST). The CRCPD currently has four accredited laboratories. All the laboratories are working with the Conference in promoting the improvement of MQA in radiation control programs.

  11. Synchrotron-radiation research

    International Nuclear Information System (INIS)

    Cunningham, J.E.

    1982-01-01

    The use of radiation from synchrotron sources has started a renaissance in materials, physics, chemistry, and biology. Synchrotron radiation has advantages over conventional x rays in that its source brightness is a thousand times greater throughout a continuous energy spectrum, and resonances are produced with specific electron energy levels. Two major synchrotron radiation sources are operated by DOE: the Stanford Synchrotron Radiation Laboratory at SLAC, and the National Synchrotron Light Source at Brookhaven

  12. Radiation epidemiology

    International Nuclear Information System (INIS)

    Fabrikant, J.I.; Lyman, J.T.; Alpen, E.L.

    1983-01-01

    The effect of latency periods on cancer risk estimation is under study in our laboratory. Insofar as cancer incidences and radiation doses are concerned, effort is made to ascertain these with the greatest reliability, although problems arise, particularly in attempts to reconstruct the events of exposure many years prevously. The matter of the long latent periods begs the important issue of how to project into the future the risk of cancer induced in individuals exposed at the present time, or depriving a projection model appropriate for predicting how induced cancers will express themselves in time following exposure. Two risk-projection models which are generally used by radiation epidemiologists are discussed

  13. Audio Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Provides an environment and facilities for auditory display research. A primary focus is the performance use of binaurally rendered 3D sound in conjunction...

  14. Target laboratory

    International Nuclear Information System (INIS)

    Ephraim, D.C.; Pednekar, A.R.

    1993-01-01

    A target laboratory to make stripper foils for the accelerator and various targets for use in the experiments is set up in the pelletron accelerator facility. The facilities available in the laboratory are: (1) D.C. glow discharge setup, (2) carbon arc set up, and (3) vacuum evaporation set up (resistance heating), electron beam source, rolling mill - all for target preparation. They are described. Centrifugal deposition technique is used for target preparation. (author). 3 figs

  15. Semiconductor Electrical Measurements Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Semiconductor Electrical Measurements Laboratory is a research laboratory which complements the Optical Measurements Laboratory. The laboratory provides for Hall...

  16. Radiation treatment of foodstuffs

    International Nuclear Information System (INIS)

    Luther, T.; Huebner, G.

    1990-10-01

    In addition to fundamental demands on radiation and safety engineering of irradiation facilities, the necessity arises to optimize irradiation conditions by using facilities to capacity and thus reducing irradiation costs. The following subjects are dealt with in detail: rehabilitation of a pilot plant for radiation treatment of onions; examination of radiation resistance of components and equipment parts of food irradiation facilities; chemical dosimetry; relative measurement of the intensity of radioactive sources; thermo- and chemiluminescence to prove irradiation of foodstuffs; radiation induced sprout inhibition of potatoes; laboratory tests of delayed maturation of tomatoes; radiation treatment of strawberries; radiation treatment of forage; radiation induced sprout inhibition of acid-treated onions; radiation treatment of starch and potatoe products; radiation treatment of cosmetics; the universal radiation source UNI 88/26 for gamma irradiation facilities; microbiological aspects of food irradiation, and introduction of chicken irradiation on an industrial scale. (BBR) [de

  17. Clinical and laboratory assessment of a combination of drugs with radiation. Coordinated programme on improvement in radiotherapy of cancer using modifiers of radiosensitivity of cells

    International Nuclear Information System (INIS)

    Bleehen, N.

    1982-01-01

    Applications were clinically studied of misonidazole (MISO) as a hypoxic cell radiosensitizer with pharmacokinetic studies. Work with desmethylmisonidazole was focused on its penetration into the CNS because its low lipophilicity would predict poorer access than MISO. Laboratory work was focused on the interaction of hyperthermia with drugs. Cytotoxicity of MISO induced by hyperthermia was studied. Heat response following hypoxic pretreatment with MISO of EMT6 spheroids showed marked enhancement of subsequent heat killing dependent on the duration of the hypoxic pretreatment. The effect was studied in vitro of preheat temperature at modest temperatures (39 to 43 0 C) on thermal tolerance and subsequent hyperthermic (43 to 44 0 C) interaction with bleomycin, adriamycin and BCNU. Interaction between several cytotoxic drugs and two potentially critical normal tissues, skin and bone marrow was studied in the mouse. No increase in the heat reaction in the skin of the mouse foot was observed following single injections of adriamycin, bleomycin or 5 daily doses of bleomycin together with a single heat treatment. Single doses of BCNU and CTX increased the heat reaction. The radioprotector WR2721 failed to protect against either the heat or heat drug reactions from CTX and BCNU

  18. Radiological risk assessment of isotope laboratories according to the requirements of the radiation protection ordinance and the protective labour legislation; Beurteilung des radiologischen Risikos von Isotopenlaboratorien nach den Vorgaben der Strahlenschutzverordnung und den Richtlinien fuer Arbeitssicherheit

    Energy Technology Data Exchange (ETDEWEB)

    Stuerm, R.P. [SafPro AG, Ausbildung und Beratung in Strahlenschutz, Basel (Switzerland); Kuster, M. [Novartis International AG, Corporate Health, Safety and Environment, Basel (Switzerland); Traub, K. [Novartis Pharma AG, Zentralstelle fuer Strahlenschutz, Basel (Switzerland)

    2001-07-01

    According to the Swiss Radiation Safety Ordinance the supervising authority may require a safety report from the operator of a radioactive laboratory (Art.95) and establish the methodology of the risk analysis. Isotope laboratories of the chemical industry are supervised by Swiss accident insurance agency (SUVA). In that respect SUVA safeguards both radiation protection issues and general protection of the workers and established guide lines in order to assess conventional risks in industrial premises. In these conventional analysis the working process is analysed according to its possible detriment (death, severe invalidity, slight invalidity, injury with absence, injury without absence) and the probability of occurrence (frequent, seldom, rare, improbable, virtually impossible). According to this the risks are categorised in a matrix as 'high', 'medium' and 'low'. SUVA requested such a risk analysis for two isotope laboratories of B type in Basel in which on the one hand the hazard to the workers on the other hand to the public should be analysed and radiologically assessed. It was proposed to use a methodology established in workers safety and the insurance section. This required a comparison of risks of radiation doses in mSv to the consequences of conventional working accidents (death, invalidity) and the risk perception of the public and politicians. In this paper this risk matrix derived in discussions among the supervising body, the company management, the laboratory head and workers is described. In the opinion of the authors such a comparison between radiological and conventional risks has not been performed up to now and the results obtained here are open to discussion. (orig.) [German] Gemaess schweizerischer Strahlenschutzverordnung kann die Aufsichtsbehoerde vom Inhaber einer Bewilligung zum Umgang mit radioaktiven Stoffen einen Sicherheitsbericht verlangen (Art. 95) und die Methodik der Stoerfallanalyse festlegen (Art

  19. Laboratory safety handbook

    Science.gov (United States)

    Skinner, E.L.; Watterson, C.A.; Chemerys, J.C.

    1983-01-01

    Safety, defined as 'freedom from danger, risk, or injury,' is difficult to achieve in a laboratory environment. Inherent dangers, associated with water analysis and research laboratories where hazardous samples, materials, and equipment are used, must be minimized to protect workers, buildings, and equipment. Managers, supervisors, analysts, and laboratory support personnel each have specific responsibilities to reduce hazards by maintaining a safe work environment. General rules of conduct and safety practices that involve personal protection, laboratory practices, chemical handling, compressed gases handling, use of equipment, and overall security must be practiced by everyone at all levels. Routine and extensive inspections of all laboratories must be made regularly by qualified people. Personnel should be trained thoroughly and repetitively. Special hazards that may involve exposure to carcinogens, cryogenics, or radiation must be given special attention, and specific rules and operational procedures must be established to deal with them. Safety data, reference materials, and texts must be kept available if prudent safety is to be practiced and accidents prevented or minimized.

  20. Isotope laboratories

    International Nuclear Information System (INIS)

    1978-01-01

    This report from the Dutch Ministry of Health is an advisory document concerned with isotope laboratories in hospitals, in connection with the Dutch laws for hospitals. It discusses which hospitals should have isotope laboratories and concludes that as many hospitals as possible should have small laboratories so that emergency cases can be dealt with. It divides the Netherlands into regions and suggests which hospitals should have these facilities. The questions of how big each lab. is to be, what equipment each has, how each lab. is organised, what therapeutic and diagnostic work should be carried out by each, etc. are discussed. The answers are provided by reports from working groups for in vivo diagnostics, in vitro diagnostics, therapy, and safety and their results form the criteria for the licences of isotope labs. The results of a questionnaire for isotope labs. already in the Netherlands are presented, and their activities outlined. (C.F.)

  1. The NRPB Chilton Calibration Laboratory for radiological protection measurements

    International Nuclear Information System (INIS)

    Iles, W.J.

    1982-01-01

    The Calibration Laboratory in NRPB Headquarters is intended as an authoritative reference laboratory for all aspects of radiation protection level instrument calibrations for X-, gamma and beta radiations and to be complementary to the national primary standards of the National Physical Laboratory. The gamma ray, filtered X-ray, fluorescence X-ray and beta ray facilities are described. (U.K.)

  2. Kingsbury Laboratories

    International Nuclear Information System (INIS)

    Hughes, S.B.

    1986-01-01

    The paper concerns the work of the Kingsbury Laboratories of Fairey Engineering Company, for the nuclear industry. The services provided include: monitoring of nuclear graphite machining, specialist welding, non-destructive testing, and metallurgy testing; and all are briefly described. (U.K.)

  3. Synchrotron Radiation Facility

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Studies the effects of UV radiation and X rays on solids, and calibrates X-ray optics, detectors, and instruments.DESCRIPTION: Research focuses on applying...

  4. Cosmic microwave background radiation

    International Nuclear Information System (INIS)

    Wilson, R.W.

    1979-01-01

    The 20-ft horn-reflector antenna at Bell Laboratories is discussed in detail with emphasis on the 7.35 cm radiometer. The circumstances leading to the detection of the cosmic microwave background radiation are explored

  5. Enhancing radiation biodosimetry capability

    International Nuclear Information System (INIS)

    Alok, A.; Kumar, A.; Kulshrestra, S.; Choudhary, S.; Bhagi, S.; Adhikari, J.S.; Chaudhury, N.K.

    2016-01-01

    Biodosimetry laboratories are necessary for quick and accurate assessment of absorbed radiation dose in suspected individuals for their medical management. The method is based on dicentric chromosomal assay (Gold standard). This assay is completely manual and time consuming, require skill and competency of laboratory staff. There is a necessity of more biodosimetry labs within country and networking within and at international level for enhancing medical preparedness for management of radiation emergency

  6. NSLS source development laboratory

    International Nuclear Information System (INIS)

    Ben-Zvi, I.; Blum, E.; Johnson, E.D.

    1995-01-01

    The National Synchrotron Light Source (NSLS) has initiated an ambitious project to develop fourth generation radiation sources. To achieve this goal, the Source Development Laboratory (SDL) builds on the experience gained at the NSLS, and at the highly successful BNL Accelerator Test Facility. The SDL accelerator system will consist of a high brightness short pulse linac, a station for coherent synchrotron and transition radiation experiments, a short bunch storage ring, and an ultra-violet free electron laser utilizing the NISUS wiggler. The electrons will be provided by a laser photocathode gun feeding a 210 MeV S-band electron linac, with magnetic bunch compression at 80 MeV. Electron bunches as short as 100 μm with 1 nC charge will be used for pump-probe experiments utilizing coherent transition radiation. Beam will also be injected into a compact storage ring which will be a source of millimeter wave coherent synchrotron radiation. The linac will also serve as the driver for an FEL designed to allow the study of various aspects of single pass amplifiers. The first FEL configuration will be as a self-amplified spontaneous emission (SASE) FEL at 900 nm. Seeded beam and sub-harmonic seeded beam operations will push the output wavelength below 200 nm. Chirped pulse amplification (CPA) operation will also be possible, and a planned energy upgrade (by powering a fifth linac section) to 310 MeV will extend the wavelength range of the FEL to below 100 nm

  7. Saxton Transportation Operations Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Saxton Transportation Operations Laboratory (Saxton Laboratory) is a state-of-the-art facility for conducting transportation operations research. The laboratory...

  8. Laboratory investigations

    International Nuclear Information System (INIS)

    Handin, J.

    1980-01-01

    Our task is to design mined-repository systems that will adequately secure high-level nuclear waste for at least 10,000 yr and that will be mechanically stable for 50 to 100-yr periods of retrievability during which mistakes could be corrected and a valuable source of energy could be reclaimed, should national policy on the reprocessing of spent fuel ever change. The only credible path for the escape of radionuclides from the repository to the biosphere is through ground-water, and in hard rock, bulk permeability is largely governed by natural and artificial fracture systems. Catastrophic failure of an excavation in hard rock is likely to occur at the weakest links - the discontinuities in the rock mass that is perturbed first by mining and then by radiogenic heating. The laboratory can contribute precise measurements of the pertinent thermomechanical, hydrological and chemical properties and improve our understanding of the fundamental processes through careful experiments under well controlled conditions that simulate the prototype environment. Thus laboratory investigations are necessary, but they are not sufficient, for conventional sample sizes are small relative to natural defects like joints - i.e., the rock mass is not a continuum - and test durations are short compared to those that predictive modeling must take into account. Laboratory investigators can contribute substantially more useful data if they are provided facilities for testing large specimens(say one cubic meter) and for creep testing of all candidate host rocks. Even so, extrapolations of laboratory data to the field in neither space nor time are valid without the firm theoretical foundations yet to be built. Meanwhile in-situ measurements of structure-sensitive physical properties and access to direct observations of rock-mass character will be absolutely necessary

  9. Culham Laboratory

    International Nuclear Information System (INIS)

    1980-06-01

    The report contains summaries of work carried out under the following headings: fusion research experiments; U.K. contribution to the JET project; supporting studies; theoretical plasma physics, computational physics and computing; fusion reactor studies; engineering and technology; contract research; external relations; staff, finance and services. Appendices cover main characteristics of Culham fusion experiments, staff, extra-mural projects supported by Culham Laboratory, and a list of papers written by Culham staff. (U.K.)

  10. Plating laboratory

    International Nuclear Information System (INIS)

    Seamster, A.G.; Weitkamp, W.G.

    1984-01-01

    The lead plating of the prototype resonator has been conducted entirely in the plating laboratory at SUNY Stony Brook. Because of the considerable cost and inconvenience in transporting personnel and materials to and from Stony Brook, it is clearly impractical to plate all the resonators there. Furthermore, the high-beta resonator cannot be accommodated at Stony Brook without modifying the set up there. Consequently the authors are constructing a plating lab in-house

  11. Underground laboratories

    Energy Technology Data Exchange (ETDEWEB)

    Bettini, A., E-mail: Bettini@pd.infn.i [Padua University and INFN Section, Dipartimento di Fisca G. Galilei, Via Marzolo 8, 35131 Padova (Italy); Laboratorio Subterraneo de Canfranc, Plaza Ayuntamiento n1 2piso, Canfranc (Huesca) (Spain)

    2011-01-21

    Underground laboratories provide the low radioactive background environment necessary to frontier experiments in particle and nuclear astrophysics and other disciplines, geology and biology, that can profit of their unique characteristics. The cosmic silence allows to explore the highest energy scales that cannot be reached with accelerators by searching for extremely rare phenomena. I will briefly review the facilities that are operational or in an advanced status of approval around the world.

  12. Practical radiation protection

    International Nuclear Information System (INIS)

    Brouwer, G.; Van den Eijnde, J.H.G.M.

    1997-01-01

    This textbook aims at providing sufficient knowledge and insight to carry out correctly radiation protection activities and operations. The subjects are appropriate for the training of radiation protection experts for the levels 5A (encapsulated sources, X rays) and 5B (open sources, laboratory activities)

  13. Hanford Laboratories monthly activities report, March 1963

    Energy Technology Data Exchange (ETDEWEB)

    1963-04-15

    This is the monthly report for the Hanford Laboratories Operation March 1963. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, physics and instrumentation research, operations research and synthesis, programming, and radiation protection operation are discussed.

  14. Hanford Laboratories monthly activities report, January 1964

    Energy Technology Data Exchange (ETDEWEB)

    1964-02-14

    This is the monthly report for the Hanford Laboratories Operation, January 1964. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, physics and instrumentation research, applied mathematics, programming operation, and radiation protection are discussed.

  15. Hanford Laboratories monthly activities report, May 1964

    Energy Technology Data Exchange (ETDEWEB)

    1964-06-15

    This is the monthly report for the Hanford Laboratories Operation, May 1964. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, physics and instrumentation research, applied mathematics, programming operation, and radiation protection are discussed.

  16. Hanford Laboratories monthly activities report, January 1963

    Energy Technology Data Exchange (ETDEWEB)

    1963-02-15

    This is the monthly report for the Hanford Laboratories Operation January 1963. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, physics and instrumentation research, operations research and synthesis, programming, and radiation protection operation are discussed.

  17. Hanford Laboratories monthly activities report, February 1964

    Energy Technology Data Exchange (ETDEWEB)

    1964-03-16

    This is the monthly report for the Hanford Laboratories Operation, February, 1964. Reactor fuels, chemistry, dosimetry, separation process, reactor technology financial activities, biology operation, physics and instrumentation research, employee relations, applied mathematics, programming, and radiation protection are discussed.

  18. Hanford Laboratories monthly activities report, April 1964

    Energy Technology Data Exchange (ETDEWEB)

    1964-05-15

    This is the monthly report for the Hanford Laboratories Operation, April 1964. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, physics and instrumentation research, applied mathematics, programming operation, and radiation protection are discussed.

  19. Hanford Laboratories monthly activities report, July 1964

    Energy Technology Data Exchange (ETDEWEB)

    1964-08-14

    This is the monthly report for the Hanford Laboratories Operation, July 1964. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, physics and instrumentation research, applied mathematics, programming operation, and radiation protection are discussed.

  20. Hanford Laboratories monthly activities report, April, 1963

    Energy Technology Data Exchange (ETDEWEB)

    1963-05-15

    This is the monthly report for the Hanford Laboratories Operation, April, 1963. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology financial activities, biology operation, physics and instrumentation research, employee relations, applied mathematics operation, programming, and radiation protection operation discussed.

  1. High Energy Density Laboratory Astrophysics

    CERN Document Server

    Lebedev, Sergey V

    2007-01-01

    During the past decade, research teams around the world have developed astrophysics-relevant research utilizing high energy-density facilities such as intense lasers and z-pinches. Every two years, at the International conference on High Energy Density Laboratory Astrophysics, scientists interested in this emerging field discuss the progress in topics covering: - Stellar evolution, stellar envelopes, opacities, radiation transport - Planetary Interiors, high-pressure EOS, dense plasma atomic physics - Supernovae, gamma-ray bursts, exploding systems, strong shocks, turbulent mixing - Supernova remnants, shock processing, radiative shocks - Astrophysical jets, high-Mach-number flows, magnetized radiative jets, magnetic reconnection - Compact object accretion disks, x-ray photoionized plasmas - Ultrastrong fields, particle acceleration, collisionless shocks. These proceedings cover many of the invited and contributed papers presented at the 6th International Conference on High Energy Density Laboratory Astrophys...

  2. RHOBOT: Radiation hardened robotics

    Energy Technology Data Exchange (ETDEWEB)

    Bennett, P.C.; Posey, L.D. [Sandia National Labs., Albuquerque, NM (United States)

    1997-10-01

    A survey of robotic applications in radioactive environments has been conducted, and analysis of robotic system components and their response to the varying types and strengths of radiation has been completed. Two specific robotic systems for accident recovery and nuclear fuel movement have been analyzed in detail for radiation hardness. Finally, a general design approach for radiation-hardened robotics systems has been developed and is presented. This report completes this project which was funded under the Laboratory Directed Research and Development program.

  3. RHOBOT: Radiation hardened robotics

    International Nuclear Information System (INIS)

    Bennett, P.C.; Posey, L.D.

    1997-10-01

    A survey of robotic applications in radioactive environments has been conducted, and analysis of robotic system components and their response to the varying types and strengths of radiation has been completed. Two specific robotic systems for accident recovery and nuclear fuel movement have been analyzed in detail for radiation hardness. Finally, a general design approach for radiation-hardened robotics systems has been developed and is presented. This report completes this project which was funded under the Laboratory Directed Research and Development program

  4. Safety guide for protection in nuclear medicine laboratories

    International Nuclear Information System (INIS)

    1995-01-01

    The regulations that must be taken into account during constructing the nuclear medicine laboratories to meet the requirements of radiation protection and the specifications of equipment in the laboratory, quality control, radioactive monitoring, protective procedures, personnel qualifications are given

  5. Synchrotron radiation

    International Nuclear Information System (INIS)

    Pattison, P.; Quinn, P.

    1990-01-01

    This report details the activities in synchrotron radiation and related areas at Daresbury Laboratory during 1989/90. The number and scope of the scientific reports submitted by external users and in-house staff is a reflection of the large amount of scheduled beamtime and high operating efficiency achieved at the Synchrotron Radiation Source (SRS) during the past year. Over 4000 hours of user beam were available, equivalent to about 80% of the total scheduled time. Many of the reports collected here illustrate the increasing technical complexity of the experiments now being carried out at Daresbury. Provision of the appropriate technical and scientific infrastructure and support is a continuing challenge. The development of the Materials Science Laboratory together with the existing Biological Support Laboratory will extend the range of experiments which can be carried out on the SRS. This will particularly facilitate work in which the sample must be prepared or characterised immediately before or during an experiment. The year 1989/90 has also seen a substantial upgrade of several stations, especially in the area of x-ray optics. Many of the advantages of the High Brightness Lattice can only be exploited effectively with the use of focusing optics. As the performance of these stations improves, the range of experiments which are feasible on the SRS will be extended significantly. (author)

  6. Radiation physics, biophysics, and radiation biology

    International Nuclear Information System (INIS)

    Hall, E.J.; Zaider, M.

    1991-05-01

    Research at the Radiological Research Laboratory is a blend of physics, chemistry, and biology, involving research at the basic level with the admixture of a small proportion of pragmatic or applied research in support of radiation protection and/or radiotherapy. Current research topics include: oncogenic transformation assays, mutation studies involving interactions between radiation and environmental contaminants, isolation, characterization and sequencing of a human repair gene, characterization of a dominant transforming gene found in C3H 10T1/2 cells, characterize ab initio the interaction of DNA and radiation, refine estimates of the radiation quality factor Q, a new mechanistic model of oncogenesis showing the role of long-term low dose medium LET radiation, and time dependent modeling of radiation induced chromosome damage and subsequent repair or misrepair

  7. The design of hot laboratories

    International Nuclear Information System (INIS)

    1976-01-01

    The need for specialized laboratories to handle radioactive substances of high activity has increased greatly due to the expansion of the nuclear power industry and the widespread use of radioisotopes in scientific research and technology. Such laboratories, which are called hot laboratories, are specially designed and equipped to handle radioactive materials of high activity, including plutonium and transplutonium elements. The handling of plutonium and transplutonium elements presents special radiation-protection and safety problems because of their high specific activity and high radiotoxicity. Therefore, the planning, design, construction and operation of hot laboratories must meet the stringent safety, containment, ventilation, shielding, criticality control and fire-protection requirements. The IAEA has published two manuals in its Safety Series, one on the safety aspects of design and equipment of hot laboratories (SS No.30) and the other on the safe handling of plutonium (SS No.39). The purpose of the symposium in Otaniemi was to collect information on recent developments in the safety features of hot laboratories and to review the present state of knowledge. A number of new developments have taken place as the result of growing sophistication in the philosophy of radiation protection as given in the ICRP recommendations (Report No.22) and in the Agency's basic safety standards (No.9). The topics discussed were safety features of planning and design, air cleaning, transfer and transport systems, criticality control, fire protection, radiological protection, waste management, administrative arrangements and operating experience

  8. Design/installation and structural integrity assessment under the Federal Facility Agreement for Bethel Valley Low-Level Waste Collection and Transfer System upgrade for Building 2026 (High Radiation Level Analytical Laboratory) and Building 2099 (Monitoring and Control Station) at Oak Ridge National Laboratory

    International Nuclear Information System (INIS)

    1994-10-01

    This document presents a Design/Installation and Structural Integrity Assessment for a replacement tank system for portions of the Bethel Valley Low Level Waste (LLW) System, located at the Oak Ridge Reservation, Oak Ridge, Tennessee. This issue of the assessment covers the design aspects of the replacement tank system, and certifies that the design has sufficient structural integrity and is acceptable for the storing or treating of hazardous and/or radioactive substances. The present issue identifies specific activities that must be completed during the fabrication, installation, and testing of the replacement tank system in order to provide assurance that the final installation complies with governing requirements. Portions of the LLW system are several decades old, or older, and do not comply with current environmental protection regulations. Several subsystems of the LLW system have been designated to receive a state-of-the-art replacement and refurbishment. One such subsystem serves Building 2026, the High Radiation Level Analytical Laboratory. This assessment focuses on the scope of work for the Building 2026 replacement LLW Collection and Transfer System, including the provision of a new Monitoring and Control Station (Building 2099) to receive, store, and treat (adjust pH) low level radioactive waste

  9. Going bananas in the radiation laboratory

    Science.gov (United States)

    Hoeling, Barbara; Reed, Douglas; Siegel, P. B.

    1999-05-01

    A simple setup for measuring the amount of potassium in foods is described. A 3-in. NaI detector is used to measure samples that are 3000 cm3 in size. With moderate shielding, the potassium content can be measured down to a detection limit of a few parts per 10 000.

  10. Overview. Health Physics Laboratory. Section 10

    International Nuclear Information System (INIS)

    Waligorski, M.P.R.

    1995-01-01

    The activities of the Health Physics Laboratory at the Niewodniczanski Institute of Nuclear Physics are presented and namely: research in the area of radiation physics and radiation protection of the employees of the Institute of Nuclear Physics, theoretical research concerns radiation detectors, radiation protection and studies of concepts of radiation protection and experimental research concerns solid state dosimetry. In this report, apart of the detail descriptions of mentioned activities, the information about personnel employed in the Department, papers and reports published in 1994, contribution to conferences and grants are also given

  11. Overview. Health Physics Laboratory. Section 10

    Energy Technology Data Exchange (ETDEWEB)

    Waligorski, M.P.R. [Institute of Nuclear Physics, Cracow (Poland)

    1995-12-31

    The activities of the Health Physics Laboratory at the Niewodniczanski Institute of Nuclear Physics are presented and namely: research in the area of radiation physics and radiation protection of the employees of the Institute of Nuclear Physics, theoretical research concerns radiation detectors, radiation protection and studies of concepts of radiation protection and experimental research concerns solid state dosimetry. In this report, apart of the detail descriptions of mentioned activities, the information about personnel employed in the Department, papers and reports published in 1994, contribution to conferences and grants are also given.

  12. Radiation chemistry

    International Nuclear Information System (INIS)

    Rodgers, F.; Rodgers, M.A.

    1987-01-01

    The contents of this book include: Interaction of ionizing radiation with matter; Primary products in radiation chemistry; Theoretical aspects of radiation chemistry; Theories of the solvated electron; The radiation chemistry of gases; Radiation chemistry of colloidal aggregates; Radiation chemistry of the alkali halides; Radiation chemistry of polymers; Radiation chemistry of biopolymers; Radiation processing and sterilization; and Compound index

  13. Sandia Laboratories technical capabilities: auxiliary capabilities

    International Nuclear Information System (INIS)

    1978-09-01

    The primary responsibility of the environmental health function is the evaluation and control of hazardous materials and conditions. The evaluation and control of toxic materials, nonionizing radiation such as laser beams and microwaves, and ionizing radiation such as from radiation machines and radioactive sources, are examples of the activities of environmental health programs. A chemical laboratory is operated for the analysis of toxic and radioactive substances and for the bioassay program to provide an index of internal exposure of personnel to toxic and radioactive materials. Instrumentation support and development is provided for environmental health activities. A dosimetry program is maintained to measure personnel exposure to external ionizing radiation. A radiation counting laboratory is maintained. Reentry safety control and effluent documentation support are provided for underground nuclear tests at the Nevada Test Site. A radiation training program is provided for laboratory personnel which covers all areas of radiation protection, from working with radioactive materials to radiation-producing machines. The information science activity functions within the framework of Sandia Laboratories' technical libraries. Information science is oriented toward the efficient dissemination of information to technical and administrative personnel. Computerized systems are used to collect, process and circulate books, reports, and other literature. Current-awareness, reference, translation, and literature-search services are also provided

  14. Radiation dosage

    Energy Technology Data Exchange (ETDEWEB)

    Finston, Roland [Health Physics, Stanford University, Stanford, CA (United States)

    1986-07-01

    Radiation dosage at Bikini Atoll is the result of current soil contamination, a relic of the nuclear weapons testing program of some 30 years ago. The principal contaminants today and some of their physical properties are listed: cesium-137, strontium-90, plutonium -239, 240 and americium-241. Cobalt-60 contributes less than 1 to the dose and is not considered significant. A resident of the atoll would accumulate radiation dose (rem) in two ways -- by exposure to radiation emanating from the ground and vegetation, and by exposure to radiation released in the spontaneous decay of radionuclides that have entered his body during the ingestion of locally grown foods. The latter process would account for some 90% of the dose; cesium-137 would be responsible for 0 90% of it. Since BARC's method of estimating dosage differs in some respects from that employed by the Lawrence Livermore National Laboratory (LLNL), (Ref.1, LLNL 1982) we are presenting our method in detail. The differences have two sources. First, the numbers used by BARC for the daily ingestion of radionuclides via the diet are higher than LLNL's. Second, BARC's calculation of dose from radionuclide intake utilizes the ICRP system. The net result is that BARC doses are consistently higher than LLNL doses, and in this respect are more conservative.

  15. Radiation dosage

    International Nuclear Information System (INIS)

    Finston, Roland

    1986-01-01

    Radiation dosage at Bikini Atoll is the result of current soil contamination, a relic of the nuclear weapons testing program of some 30 years ago. The principal contaminants today and some of their physical properties are listed: cesium-137, strontium-90, plutonium -239, 240 and americium-241. Cobalt-60 contributes less than 1 to the dose and is not considered significant. A resident of the atoll would accumulate radiation dose (rem) in two ways -- by exposure to radiation emanating from the ground and vegetation, and by exposure to radiation released in the spontaneous decay of radionuclides that have entered his body during the ingestion of locally grown foods. The latter process would account for some 90% of the dose; cesium-137 would be responsible for 0 90% of it. Since BARC's method of estimating dosage differs in some respects from that employed by the Lawrence Livermore National Laboratory (LLNL), (Ref.1, LLNL 1982) we are presenting our method in detail. The differences have two sources. First, the numbers used by BARC for the daily ingestion of radionuclides via the diet are higher than LLNL's. Second, BARC's calculation of dose from radionuclide intake utilizes the ICRP system. The net result is that BARC doses are consistently higher than LLNL doses, and in this respect are more conservative

  16. Radiation microbiology relevant to radiation processing

    International Nuclear Information System (INIS)

    Tallentire, A.

    1979-01-01

    The subject is discussed under the following headings: typical background studies involving laboratory models (measurement of radiation responses of different organisms, alone or on or in products; isolation of radiation resistant organisms from products and product environments; measurement of levels of preirradiation microbial contamination ('bioburden')); supplementary studies involving naturally occurring microbial contaminants (unit medical products; microbiological quality assurance; products in bulk; animal diet study). (U.K.)

  17. Handbook of laboratory health and safety measures

    International Nuclear Information System (INIS)

    Pal, S.B.

    1985-01-01

    The application of radioactive isotopes and various scientific instruments based on different ionizing and non-ionizing radiation have brought new safety problems to laboratory workers today. Therefore, there is a need to revise present knowledge of safety measures to deal with new hazards, thus broadening the outlook towards health and safety measures for contemporary laboratory staff. This handbook presents a series of articles on current knowledge regarding laboratory safety

  18. Environmental radiation data, 7

    International Nuclear Information System (INIS)

    Nagaoka, Toshi; Sakamoto, Ryuichi; Saito, Kimiaki; Tsutsumi, Masahiro; Moriuchi, Shigeru

    1989-10-01

    The Environmental Radiation Physics Laboratory has conducted a large number of background radiation surveys in these years, aiming at the analysis of characteristics and behaviour of environmental radiation, the development of measurement techniques and instruments of environmental radiation, and the evaluation of environmental radiation dose. The environmental radiation data obtained by these surveys are useful for broad purposes as actual survey data. Therefore, it is desirable to make the recording media and the FORMAT of these data available for usual computers. In the light of this circumstance, these data were rearranged and recompiled systematically to meet the demand. This report mentions about the data obtained by the background radiation surveys in and around Tokyo performed during 1982 - 1988 using portable instruments, as well as the information necessary for the data handling. (author)

  19. 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

  20. Studies of acute and chronic radiation injury at the Biological and Medical Research Division, Argonne National Laboratory, 1953-1970: Description of individual studies, data files, codes, and summaries of significant findings

    Energy Technology Data Exchange (ETDEWEB)

    Grahn, D.; Fox, C.; Wright, B.J.; Carnes, B.A.

    1994-05-01

    Between 1953 and 1970, studies on the long-term effects of external x-ray and {gamma} irradiation on inbred and hybrid mouse stocks were carried out at the Biological and Medical Research Division, Argonne National Laboratory. The results of these studies, plus the mating, litter, and pre-experimental stock records, were routinely coded on IBM cards for statistical analysis and record maintenance. Also retained were the survival data from studies performed in the period 1943-1953 at the National Cancer Institute, National Institutes of Health, Bethesda, Maryland. The card-image data files have been corrected where necessary and refiled on hard disks for long-term storage and ease of accessibility. In this report, the individual studies and data files are described, and pertinent factors regarding caging, husbandry, radiation procedures, choice of animals, and other logistical details are summarized. Some of the findings are also presented. Descriptions of the different mouse stocks and hybrids are included in an appendix; more than three dozen stocks were involved in these studies. Two other appendices detail the data files in their original card-image format and the numerical codes used to describe the animal`s exit from an experiment and, for some studies, any associated pathologic findings. Tabular summaries of sample sizes, dose levels, and other variables are also given to assist investigators in their selection of data for analysis. The archive is open to any investigator with legitimate interests and a willingness to collaborate and acknowledge the source of the data and to recognize appropriate conditions or caveats.

  1. Studies of acute and chronic radiation injury at the Biological and Medical Research Division, Argonne National Laboratory, 1953-1970: Description of individual studies, data files, codes, and summaries of significant findings

    International Nuclear Information System (INIS)

    Grahn, D.; Fox, C.; Wright, B.J.; Carnes, B.A.

    1994-05-01

    Between 1953 and 1970, studies on the long-term effects of external x-ray and γ irradiation on inbred and hybrid mouse stocks were carried out at the Biological and Medical Research Division, Argonne National Laboratory. The results of these studies, plus the mating, litter, and pre-experimental stock records, were routinely coded on IBM cards for statistical analysis and record maintenance. Also retained were the survival data from studies performed in the period 1943-1953 at the National Cancer Institute, National Institutes of Health, Bethesda, Maryland. The card-image data files have been corrected where necessary and refiled on hard disks for long-term storage and ease of accessibility. In this report, the individual studies and data files are described, and pertinent factors regarding caging, husbandry, radiation procedures, choice of animals, and other logistical details are summarized. Some of the findings are also presented. Descriptions of the different mouse stocks and hybrids are included in an appendix; more than three dozen stocks were involved in these studies. Two other appendices detail the data files in their original card-image format and the numerical codes used to describe the animal's exit from an experiment and, for some studies, any associated pathologic findings. Tabular summaries of sample sizes, dose levels, and other variables are also given to assist investigators in their selection of data for analysis. The archive is open to any investigator with legitimate interests and a willingness to collaborate and acknowledge the source of the data and to recognize appropriate conditions or caveats

  2. Sandia National Laboratories/New Mexico 1994 site environmental report. Summary pamphlet

    International Nuclear Information System (INIS)

    1995-01-01

    This document presents details of the environmental activities that occurred during 1994 at Sandia National Laboratories. Topics include: Background about Sandia; radiation facts; sources of radiation; environmental monitoring; discussion of radiation detectors; radioactive waste management; environmental restoration; and quality assurance

  3. Sandia National Laboratories/New Mexico 1994 site environmental report. Summary pamphlet

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-31

    This document presents details of the environmental activities that occurred during 1994 at Sandia National Laboratories. Topics include: Background about Sandia; radiation facts; sources of radiation; environmental monitoring; discussion of radiation detectors; radioactive waste management; environmental restoration; and quality assurance.

  4. Radiation Calibration Measurements

    International Nuclear Information System (INIS)

    Omondi, C.

    2017-01-01

    KEBS Radiation Dosimetry mandate are: Custodian of Kenya Standards on Ionizing radiation, Ensure traceability to International System (SI ) and Calibration radiation equipment. RAF 8/040 on Radioisotope applications for troubleshooting and optimizing industrial process established Radiotracer Laboratory objective is to introduce and implement radiotracer technique for problem solving of industrial challenges. Gamma ray scanning technique applied is to Locate blockages, Locate liquid in vapor lines, Locate areas of lost refractory or lining in a pipe and Measure flowing densities. Equipment used for diagnostic and radiation protection must be calibrated to ensure Accuracy and Traceability

  5. Advances in radiation epidemiology

    International Nuclear Information System (INIS)

    Boice, J.

    1997-01-01

    The 1994 UNSCEAR report provides an informative review of radiation epidemiology. During the past 2 years there have been several major advances in our understanding of radiation effects based on new studies of atomic bomb survivors in Japan, of patients given diagnostic and therapeutic radiation (including iodine-131), of workers occupationally exposed, and of general populations exposed to residential radon. Laboratory approaches are also being incorporated into epidemiological investigations to learn more about the biological mechanism by which radiation causes cancer in man. (author)

  6. measurement of indoor background ionizing radiation in some

    African Journals Online (AJOL)

    Administrator

    Measurement of the background ionizing radiation profile within the. Chemistry Research Laboratory and Physics Laboratory III all of the. University of Jos and their immediate neighbourhood were carried out. These science laboratories also harbour a number of active radiation sources. The radiation levels were measured ...

  7. Bio Engineering Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — Description/History: Chemistry and biology laboratoriesThe Bio Engineering Laboratory (BeL) is theonly full spectrum biotechnology capability within the Department...

  8. FOOTWEAR PERFORMANCE LABORATORY

    Data.gov (United States)

    Federal Laboratory Consortium — This laboratory provides biomechanical and physical analyses for both military and commercial footwear. The laboratory contains equipment that is integral to the us...

  9. Nanotechnology Characterization Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Nanotechnology Characterization Laboratory (NCL) at the Frederick National Laboratory for Cancer Research performs preclinical characterization of nanomaterials...

  10. Physical Sciences Laboratory (PSL)

    Data.gov (United States)

    Federal Laboratory Consortium — PNNL's Physical Sciences Laboratory (PSL) houses 22 research laboratories for conducting a wide-range of research including catalyst formulation, chemical analysis,...

  11. Distributed Energy Technology Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Distributed Energy Technologies Laboratory (DETL) is an extension of the power electronics testing capabilities of the Photovoltaic System Evaluation Laboratory...

  12. Radiation and radiation protection

    International Nuclear Information System (INIS)

    Landfermann, H.H.; Solbach, C.

    1992-11-01

    The brochure explains the major types of radiation, the radiation sources, effects, uses, and risks, as well as the regulatory system adopted by the government in order to keep the risks as low as possible. (orig./DG) [de

  13. Intercomparison of Environmental Nuclear Radiation Measuring

    Institute of Scientific and Technical Information of China (English)

    GAO; Fei; NI; Ning; HOU; Jin-bing; SONG; Ming-zhe

    2015-01-01

    In 2015,Radiation Metrology Division of China Institute of Atomic Energy organized an environmental monitoring of nuclear radiation measuring intercomparison,and 9laboratories attended.The intercomparison included environmental level dosemeters and protection level

  14. Radiation measurement

    International Nuclear Information System (INIS)

    Go, Sung Jin; Kim, Seung Guk; No, Gyeong Seok; Park, Myeong Hwan; Ann, Bong Seon

    1998-03-01

    This book explains technical terms about radiation measurement, which are radiation, radiation quantity and unit such as prefix of international unit, unit for defence purposes of radiation, coefficient of radiation and interaction, kinds and principles of radiation detector, ionization chamber, G-M counter, G-M tube, proportional counter, scintillation detector, semiconductor radiation detector, thermoluminescence dosimeter, PLD, others detector, radiation monitor, neutron detector, calibration of radiation detector, statistics of counting value, activation analysis and electronics circuit of radiation detector.

  15. Laboratory Impact Experiments

    Science.gov (United States)

    Horanyi, M.; Munsat, T.

    2017-12-01

    The experimental and theoretical programs at the SSERVI Institute for Modeling Plasmas, Atmospheres, and Cosmic Dust (IMPACT) address the effects of hypervelocity dust impacts and the nature of the space environment of granular surfaces interacting with solar wind plasma and ultraviolet radiation. These are recognized as fundamental planetary processes due their role in shaping the surfaces of airless planetary objects, their plasma environments, maintaining dust haloes, and sustaining surface bound exospheres. Dust impacts are critically important for all airless bodies considered for possible human missions in the next decade: the Moon, Near Earth Asteroids (NEAs), Phobos, and Deimos, with direct relevance to crew and mission safety and our ability to explore these objects. This talk will describe our newly developed laboratory capabilities to assess the effects of hypervelocity dust impacts on: 1) the gardening and redistribution of dust particles; and 2) the generation of ionized and neutral gasses on the surfaces of airless planetary bodies.

  16. Brookhaven National Laboratory site environmental report for calendar year 1994

    Energy Technology Data Exchange (ETDEWEB)

    Naidu, J.R.; Royce, B.A. [eds.

    1995-05-01

    This report documents the results of the Environmental Monitoring Program at Brookhaven National Laboratory and presents summary information about environmental compliance for 1994. To evaluate the effect of Brookhaven National Laboratory`s operations on the local environment, measurements of direct radiation, and a variety of radionuclides and chemical compounds in ambient air, soil, sewage effluent, surface water, groundwater, fauna and vegetation were made at the Brookhaven National Laboratory site and at sites adjacent to the Laboratory.

  17. Risk control in the laboratory

    International Nuclear Information System (INIS)

    Vermeeren, H.P.W.; Zwaard, A.W.

    1986-01-01

    This volume contains the knowledge which is needed for safely working in a laboratory. With the help of the contents it is possible to come, after an evaluation of the risks, to practical measures (risk control). Not only exposure to chemicals but also to other burdening factors (radiation, sound, radioactive materials, micro-organisms) are discussed. A general strategy for risk control forms the central point in this book. 51 refs.; 67 figs.; 29 tabs

  18. Environmental radiation data, 9

    International Nuclear Information System (INIS)

    Nagaoka, Toshi; Sakamoto, Ryuichi; Saito, Kimiaki; Tsutsumi, Masahiro; Moriuchi, Shigeru

    1993-06-01

    The Environmental Physics Laboratory has conducted a large number of background radiation surveys in these years, aiming at the analysis of characteristics and behaviour of environmental radiation, the development of measurement techniques and instruments of environmental radiation, and the evaluation of environmental radiation dose. As the environmental radiation data obtained by these surveys are useful for broad purposes as actual survey data, it is desirable to arrange these data systematically and to open them to the other scientist. For that, it is necessary to make the recording media and the FORMAT of these data available for usual computers. In the light of this circumstance, these data were rearranged and recompiled systematically to meet the demand. This report mentions about the data obtained by the background radiation surveys in and around Tokyo performed during 1991 - 1993 using portable instruments, as well as the information necessary for the data handling. (author)

  19. Environmental surveillance program of the Lawrence Berkeley Laboratory

    International Nuclear Information System (INIS)

    Thomas, R.H.

    1976-04-01

    The major radiological environmental impact of the Lawrence Berkeley Laboratory is due to the operation of four particle accelerators. Potential sources of population exposure at the Laboratory are discussed. The major source of population exposure due to accelerator operation arises from the prompt radiation field which consists principally of neutrons and photons. Release of small quantities of radionuclides is also a potential source of population exposure but is usually an order of magnitude less significant. Accelerator produced radiation levels at the Laboratory boundary are comparable with the magnitudes of the fluctuations found in the natural background radiation. Environmental monitoring of accelerator-produced radiation and of radionuclides is carried on throughout the Laboratory, at the Laboratory perimeter, and in the regions surrounding the Laboratory. The techniques used are described. The models used to calculate population exposure are described and discussed

  20. Space Radiation Research at NASA

    Science.gov (United States)

    Norbury, John

    2016-01-01

    The harmful effects of space radiation on astronauts is one of the most important limiting factors for human exploration of space beyond low Earth orbit, including a journey to Mars. This talk will present an overview of space radiation issues that arise throughout the solar system and will describe research efforts at NASA aimed at studying space radiation effects on astronauts, including the experimental program at the NASA Space Radiation Laboratory at Brookhaven National Laboratory. Recent work on galactic cosmic ray simulation at ground based accelerators will also be presented. The three major sources of space radiation, namely geomagnetically trapped particles, solar particle events and galactic cosmic rays will be discussed as well as recent discoveries of the harmful effects of space radiation on the human body. Some suggestions will also be given for developing a space radiation program in the Republic of Korea.

  1. The laboratory activities of the IAEA Laboratories, Vienna. Annual report 1979

    International Nuclear Information System (INIS)

    Cook, G.B.

    1981-03-01

    The report gives a fairly comprehensive view of the activities and results of the IAEA Laboratories in Seibersdorf, during the year 1979. These activities are presented under the following main categories: Metrology of the radiations; Dosimetry; Chemistry; Safeguards analytical laboratory; Isotope hydrology; Medical applications; Agriculture: soils; Entomology; Plant breeding; Electronics

  2. Radiation protection

    International Nuclear Information System (INIS)

    Koelzer, W.

    1975-01-01

    Physical and radiological terms, quantities, and units. Basic principles of radiation protection (ICRP, IAEA, EURATOM, FRG). Biological effects of ionizing radiation. Objectives of practical radiation protection. (HP) [de

  3. Current trends in radiation physics

    Energy Technology Data Exchange (ETDEWEB)

    Gomaa, M A; Elbehay, A Z; Hassib, G M; Elnaggar, A M [eds.

    1994-12-31

    This conference details 11 papers, explain radiation physics. It discuss subjects of axial and spherical symmetry,accelerators,cyclotron laboratory and radon monitoring. contains figures,tables and data.

  4. Current trends in radiation physics

    International Nuclear Information System (INIS)

    Gomaa, M.A.; Elbehay, A.Z.; Hassib, G.M.; Elnaggar, A.M.

    1993-01-01

    This conference details 11 papers, explain radiation physics. It discuss subjects of axial and spherical symmetry,accelerators,cyclotron laboratory and radon monitoring. contains figures,tables and data

  5. Principles of radiation therapy

    International Nuclear Information System (INIS)

    Richter, M.P.; Share, F.S.; Goodman, R.L.

    1985-01-01

    Radiation oncology now represents the integration of knowledge obtained over an 80-year period from the physics and biology laboratories and the medical clinic. Such integration is recent; until the supervoltage era following World War II, the chief developments in these three areas for the most part were realized independently. The physics and engineering laboratories have now developed a dependable family of sources of ionizing radiations that can be precisely directed at tumor volumes at various depths within the body. The biology laboratory has provided the basic scientific support underlying the intensive clinical experience and currently is suggesting ways of using ionizing radiations more effectively, such as modified fractionation schedules relating to cell cycle kinetics and the use of drugs and chemicals as modifiers of radiation response and normal tissue reaction. The radiation therapy clinic has provided the patient stratum on which the acute and chronic effects of irradiation have been assessed, and the patterns of treatment success and failure identified. The radiation therapist has shared with the surgeon and medical oncologist the responsibility for clarifying the natural history of a large number of human neoplasms, and through such clarifications, has developed more effective treatment strategies. Several examples of this include the improved results in the treatment of Hodgkin's disease, squamous cell carcinoma of the cervix, seminoma, and epithelial neoplasms of the upper aerodigestive tract

  6. Radiation environment in space

    International Nuclear Information System (INIS)

    Goka, Tateo; Koga, Kiyokazu; Matsumoto, Haruhisa; Komiyama, Tatsuo; Yasuda, Hiroshi

    2011-01-01

    Japanese Experiment Module (Kibo) had been build into the International Space Station (ISS), which is a multipurpose manned facility and laboratory and is operated in orbit at about 400 km in altitude. Two Japanese astronauts stayed in the ISS for long time (4.5 and 5.5 months) for the first time. Space radiation exposure is one of the biggest safety issues for astronauts to stay for such a long duration in space. This special paper is presenting commentary on space radiation environment in ISS, neutrons measurements and light particles (protons and electrons) measurements, the instruments, radiation exposure management for Japanese astronauts and some comments in view of health physics. (author)

  7. Dosimetry for radiation processing

    International Nuclear Information System (INIS)

    Miller, Arne

    1986-01-01

    During the past few years significant advances have taken place in the different areas of dosimetry for radiation processing, mainly stimulated by the increased interest in radiation for food preservation, plastic processing and sterilization of medical products. Reference services both by international organizations (IAEA) and national laboratories have helped to improve the reliability of dose measurements. In this paper the special features of radiation processing dosimetry are discussed, several commonly used dosimeters are reviewed, and factors leading to traceable and reliable dosimetry are discussed. (author)

  8. HPS instrument calibration laboratory accreditation program

    Energy Technology Data Exchange (ETDEWEB)

    Masse, F.X; Eisenhower, E.H.; Swinth, K.L.

    1993-12-31

    The purpose of this paper is to provide an accurate overview of the development and structure of the program established by the Health Physics Society (HPS) for accrediting instrument calibration laboratories relative to their ability to accurately calibrate portable health physics instrumentation. The purpose of the program is to provide radiation protection professionals more meaningful direct and indirect access to the National Institute of Standards and Technology (NIST) national standards, thus introducing a means for improving the uniformity, accuracy, and quality of ionizing radiation field measurements. The process is designed to recognize and document the continuing capability of each accredited laboratory to accurately perform instrument calibration. There is no intent to monitor the laboratory to the extent that each calibration can be guaranteed by the program; this responsibility rests solely with the accredited laboratory.

  9. Compound Semiconductor Radiation Detectors

    CERN Document Server

    Owens, Alan

    2012-01-01

    Although elemental semiconductors such as silicon and germanium are standard for energy dispersive spectroscopy in the laboratory, their use for an increasing range of applications is becoming marginalized by their physical limitations, namely the need for ancillary cooling, their modest stopping powers, and radiation intolerance. Compound semiconductors, on the other hand, encompass such a wide range of physical and electronic properties that they have become viable competitors in a number of applications. Compound Semiconductor Radiation Detectors is a consolidated source of information on all aspects of the use of compound semiconductors for radiation detection and measurement. Serious Competitors to Germanium and Silicon Radiation Detectors Wide-gap compound semiconductors offer the ability to operate in a range of hostile thermal and radiation environments while still maintaining sub-keV spectral resolution at X-ray wavelengths. Narrow-gap materials offer the potential of exceeding the spectral resolutio...

  10. Advanced Chemistry Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — Description/History: Chemistry laboratoryThe Advanced Chemistry Laboratory (ACL) is a unique facility designed for working with the most super toxic compounds known...

  11. Lincoln Laboratory Grid

    Data.gov (United States)

    Federal Laboratory Consortium — The Lincoln Laboratory Grid (LLGrid) is an interactive, on-demand parallel computing system that uses a large computing cluster to enable Laboratory researchers to...

  12. Gun Dynamics Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Gun Dynamics Laboratory is a research multi-task facility, which includes two firing bays, a high bay area and a second floor laboratory space. The high bay area...

  13. Denver District Laboratory (DEN)

    Data.gov (United States)

    Federal Laboratory Consortium — Program CapabilitiesDEN-DO Laboratory is a multi-functional laboratory capable of analyzing most chemical analytes and pathogenic/non-pathogenic microorganisms found...

  14. Secondary standard dosimetry laboratory at INFLPR

    Energy Technology Data Exchange (ETDEWEB)

    Scarlat, F.; Minea, R.; Scarisoreanu, A.; Badita, E.; Sima, E.; Dumitrascu, M.; Stancu, E.; Vancea, C., E-mail: scarlat.f@gmail.com [National Institute for Laser, Plasma and Radiation Physics - INFLPR, Bucharest (Romania)

    2011-07-01

    National Institute for Laser, Plasma and Radiation Physics (INFLPR) has constructed a High Energy Secondary Standard Dosimetry Laboratory SSDL-STARDOOR - for performing dosimetric calibrations according to ISO IEC SR/EN 17025:2005 standards. This is outfitted with UNIDOS Secondary Standard Dosimeter from PTW (Freiburg Physikalisch-Technische Werksttaten) calibrated at the PTB-Braunschweig (German Federal Institute of Physics and Metrology). A radiation beam of the quality of Q used by our laboratory as calibration source are provided by INFLPR 7 MeV electron beam linear accelerator mounted in our facility. (author)

  15. Development of mobile radiological assessment laboratory

    International Nuclear Information System (INIS)

    Pujari, R.N.; Saindane, Shashank S.; Jain, Amit; Parmar, Jayesh; Narsaiah, M.V.R.; Pote, M.B.; Murali, S.; Chaudhury, Probal

    2018-01-01

    During any emergency situations real-time radiation measurements and the fast analysis of the measured radiological data are of crucial importance. The newly developed mobile vehicle based laboratory known as 'Radiological Assessment Laboratory' (RAL) can be used for real time measurements in different radiation emergency scenarios, such as the release of radioactive materials from a radiological/nuclear incident, during search of an orphan source or during radioisotope transportation. RAL is equipped with several high sensitive detectors/systems such as NaI(Tl) gamma spectrometers, large size plastic scintillators and air-sampler, along with GPS and data transfer capability through GSM modem

  16. Calibration Laboratory of the Paul Scherrer Institute

    International Nuclear Information System (INIS)

    Gmuer, K.; Wernli, C.

    1994-01-01

    Calibration and working checks of radiation protection instruments are carried out at the Calibration Laboratory of the Paul Scherrer Institute. In view of the new radiation protection regulation, the calibration laboratory received an official federal status. The accreditation procedure in cooperation with the Federal Office of Metrology enabled a critical review of the techniques and methods applied. Specifically, personal responsibilities, time intervals for recalibration of standard instruments, maximum permissible errors of verification, traceability and accuracy of the standard instruments, form and content of the certificates were defined, and the traceability of the standards and quality assurance were reconsidered. (orig.) [de

  17. Research laboratories annual report. 1973 and 1974

    International Nuclear Information System (INIS)

    1975-02-01

    This report presents brief summaries of the research carried out at the Israel A.E.C. laboratories during the two years 1973 and 1974 in the following fields: theoretical physics and chemistry, neutron and reactor physics, solid state physics and metallurgy, laser-induced plasma research, nuclear physics and chemistry, radiation chemistry and applications of radiation and radioisotopes, physical and inorganic chemistry, analytical chemistry, health physics, environmental studies, instrumentation and techniques. (B.G.)

  18. Laboratory-acquired brucellosis

    DEFF Research Database (Denmark)

    Fabiansen, C.; Knudsen, J.D.; Lebech, A.M.

    2008-01-01

    Brucellosis is a rare disease in Denmark. We describe one case of laboratory-acquired brucellosis from an index patient to a laboratory technician following exposure to an infected blood culture in a clinical microbiology laboratory Udgivelsesdato: 2008/6/9......Brucellosis is a rare disease in Denmark. We describe one case of laboratory-acquired brucellosis from an index patient to a laboratory technician following exposure to an infected blood culture in a clinical microbiology laboratory Udgivelsesdato: 2008/6/9...

  19. Safe handling of plutonium in research laboratories

    International Nuclear Information System (INIS)

    1976-01-01

    The training film illustrates the main basic requirements for the safe handling of small amounts of plutonium. The film is intended not only for people setting up plutonium research laboratories but also for all those who work in existing plutonium research laboratories. It was awarded the first prize in the category ''Protection of Workers'' at the international film festival organized by the 4th World Congress of the International Radiation Protection Association (IRPA) in Paris in April 1977

  20. Quality assurance programme for isotope diagnostic laboratories

    International Nuclear Information System (INIS)

    Krasznai, Istvan

    1987-01-01

    Quality assurance systems are suggested to be introduced in laboratories, in accordance with the recommendations of IAEA and WHO, taking local circumstances into consideration. It is emphasized that a quantitative enhancement of work must not endanger its quality; diagnostic information must be undistorted, reproducible, and gathered with the minimum of radiation burden. National authorities are requested to strengthen their supervision. Recommendations for quality assurance methods are given for medical isotope diagnostic laboratories. (author)

  1. Safe handling of plutonium in research laboratories

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1977-12-31

    The training film illustrates the main basic requirements for the safe handling of small amounts of plutonium. The film is intended not only for people setting up plutonium research laboratories but also for all those who work in existing plutonium research laboratories. It was awarded the first prize in the category ``Protection of Workers`` at the international film festival organized by the 4th World Congress of the International Radiation Protection Association (IRPA) in Paris in April 1977

  2. Basic Radiation Detectors. Chapter 6

    Energy Technology Data Exchange (ETDEWEB)

    Van Eijk, C. W.E. [Faculty of Applied Sciences, Delft University of Technology, Delft (Netherlands)

    2014-12-15

    Radiation detectors are of paramount importance in nuclear medicine. The detectors provide a wide range of information including the radiation dose of a laboratory worker and the positron emission tomography (PET) image of a patient. Consequently, detectors with strongly differing specifications are used. In this chapter, general aspects of detectors are discussed.

  3. A relativistic radiation transfer benchmark

    International Nuclear Information System (INIS)

    Munier, A.

    1988-01-01

    We use the integral form of the radiation transfer equation in an one dimensional slab to determine the time-dependent propagation of the radiation energy, flux and pressure in a collisionless homogeneous medium. First order v/c relativistic terms are included and the solution is given in the fluid frame and the laboratory frame

  4. Beta emitters and radiation protection

    DEFF Research Database (Denmark)

    Jødal, Lars

    2009-01-01

    preparing 90Y-Zevalin were measured. CONCLUSIONS. Good laboratory practice is important to keep radiation doses low. To reduce bremsstrahlung, 90Y should not be shielded by lead but instead perspex (10 mm) or aluminium (5 mm). Bremsstrahlung radiation can be further reduced by adding a millimetre of lead...

  5. Characterization of reactor neutron environments at Sandia National Laboratories

    International Nuclear Information System (INIS)

    Kelly, J.G.; Luera, T.F.; Griffin, P.J.; Vehar, D.W.

    1994-01-01

    To assure quality in the testing of electronic parts in neutron radiation environments, Sandia National Laboratories (SNL) has incorporated modern techniques and procedures, developed in the last two decades by the radiation effects community, into all of its experimental programs. Attention to the application of all of these methodologies, experiment designs, nuclear data, procedures and controls to the SNL radiation services has led to the much more accurate and reliable environment characterizations required to correlate the effects observed with the radiation delivered

  6. Photovoltaic Characterization Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — NIST's PV characterization laboratory is used to measure the electrical performance and opto-electronic properties of solar cells and modules. This facility consists...

  7. Rapid Prototyping Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The ARDEC Rapid Prototyping (RP) Laboratory was established in December 1992 to provide low cost RP capabilities to the ARDEC engineering community. The Stratasys,...

  8. Central Laboratories Services

    Data.gov (United States)

    Federal Laboratory Consortium — The TVA Central Laboratories Services is a comprehensive technical support center, offering you a complete range of scientific, engineering, and technical services....

  9. Sandia National Laboratories

    Data.gov (United States)

    Federal Laboratory Consortium — For more than 60 years, Sandia has delivered essential science and technology to resolve the nation's most challenging security issues.Sandia National Laboratories...

  10. Wireless Emulation Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Wireless Emulation Laboratory (WEL) is a researchtest bed used to investigate fundamental issues in networkscience. It is a research infrastructure that emulates...

  11. FOOD SAFETY TESTING LABORATORY

    Data.gov (United States)

    Federal Laboratory Consortium — This laboratory develops screening assays, tests and modifies biosensor equipment, and optimizes food safety testing protocols for the military and civilian sector...

  12. Embedded Processor Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Embedded Processor Laboratory provides the means to design, develop, fabricate, and test embedded computers for missile guidance electronics systems in support...

  13. Vehicle Development Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Supports the development of prototype deployment platform vehicles for offboard countermeasure systems.DESCRIPTION: The Vehicle Development Laboratory is...

  14. Acoustic Technology Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — This laboratory contains an electro-magnetic worldwide data collection and field measurement capability in the area of acoustic technology. Outfitted by NASA Langley...

  15. COGNITIVE PERFORMANCE LABORATORY

    Data.gov (United States)

    Federal Laboratory Consortium — This laboratory conducts basic and applied human research studies to characterize cognitive performance as influenced by militarily-relevant contextual and physical...

  16. Space Weather Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Space Weather Computational Laboratory is a Unix and PC based modeling and simulation facility devoted to research analysis of naturally occurring electrically...

  17. Atmospheric Measurements Laboratory (AML)

    Data.gov (United States)

    Federal Laboratory Consortium — The Atmospheric Measurements Laboratory (AML) is one of the nation's leading research facilities for understanding aerosols, clouds, and their interactions. The AML...

  18. Composites Characterization Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The purpose of the Composites Characterization Laboratory is to investigate new and/or modified matrix materials and fibers for advanced composite applications both...

  19. Microgravity Emissions Laboratory (MEL)

    Data.gov (United States)

    Federal Laboratory Consortium — The Microgravity Emissions Laboratory (MEL) utilizes a low-frequency acceleration measurement system for the characterization of rigid body inertial forces generated...

  20. Semiconductor Laser Measurements Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Semiconductor Laser Measurements Laboratory is equipped to investigate and characterize the lasing properties of semiconductor diode lasers. Lasing features such...