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Sample records for astra reactor

  1. Utilization of the Research Reactor ASTRA

    International Nuclear Information System (INIS)

    A short history and an overview over present research activities at the 10 MW Pool Type Reactor ASTRA of the Austrian Research Centre Seibersdorf are given. The projects comprise: medical and industrial isotope production, material irradiations (e.g. silicon doping), neutron activation analysis, geological dating and radiation induced mutation techniques for agricultural research. (author)

  2. Spent fuel situation at the ASTRA Seibersdorf and the TRIGA Vienna research reactors

    International Nuclear Information System (INIS)

    In the past decades Austria operated three research reactors, the 10 MW ASTRA reactor at Seibersdorf, the 250 kW TRIGA reactor at the Atomic Institut Vienna and the 1 kW Argonaut reactor at the Technical University in Graz. Since the shut down on July 31st, 1999 and decommissioning of the ASTRA reactor and the shut down of the ARGONAUT reactor Graz on July 31, 2004 only the TRIGA reactor remains operational. The MTR fuel elements of the ASTRA reactor have been shipped in spring 2001 to Savannah River and the fuel plates from the ARGONAUT reactor Graz in December 2005 under the DOE fuel return programme. (author)

  3. Decommissioning of the ASTRA research reactor: Planning, executing and summarizing the project

    Directory of Open Access Journals (Sweden)

    Meyer Franz

    2010-01-01

    Full Text Available The decommissioning of the ASTRA research reactor at the Austrian Research Centres Seibersdorf was described within three technical papers already released in Nuclear Technology & Radiation Protection throughout the years 2003, 2006, and 2008. Following a suggestion from IAEA the project was investigated well after the files were closed regarding rather administrative than technical matters starting with the project mission, explaining the project structure and identifying the key factors and the key performance indicators. The continuous documentary and reporting system as implemented to fulfil the informational needs of stake-holders, management, and project staff alike is described. Finally the project is summarized in relationship to the performance indicators.

  4. Release from control of inactive material from decommissioning the ASTRA research reactor

    International Nuclear Information System (INIS)

    The Austrian Research Centers Seibersdorf have been operating a 10 MW ASTRA research reactor from 1960 until 1999. After that date, a submission of the intention to decommission the reactor has been provided to the Competent Authorities. After completion of an Environmental Impact Study by the Competent Authorities and modification of the Permissions for Site Use, the reactor finally entered the decommissioning phase in 2003. Inactive materials from the decommissioning site are expected to be released from control. The procedure for such a release from control agreed upon between the Competent Authorities and ARC Seibersdorf involves a four-step measurement, verification, and certification process detailed in this paper. By September 2003, this four-step procedure has been completed for 16500 kg of steel re-enforced concrete and for 5500 kg of other materials; the release from control of 3000 kg of paraffin and 10000 kg of graphite from the thermal column are planned for the near future. (author)

  5. Decommissioning of the ASTRA research reactor: Dismantling of the biological shield

    Directory of Open Access Journals (Sweden)

    Meyer Franz

    2006-01-01

    Full Text Available The paper describes the dismantling of the inactive and activated areas of the biological shield of the ASTRA research reactor at the Austrian Research Center in Seibersdorf. The calculation of the parameters determining the activated areas at the shield (reference nuclide, nuclide vector in the barite concrete and horizontal and vertical reduction behaviors of activity concentration and the activation profiles within the biological shield for unrestricted release, release restricted to permanent deposit and radioactive waste are presented. Considerations of located activation anomalies in the shield, e.g. in the vicinities of the beam-tubes, were made according to the reactor's operational history. Finally, an overview of the materials removed from the biological shield is given.

  6. Decommissioning of the ASTRA research reactor - dismantling of the biological shield

    International Nuclear Information System (INIS)

    The paper describes the dismantling of the inactive and activated areas of the biological shield of the ASTRA research reactor at the Austrian Research Center in Seibersdorf. The calculation of the parameters determining the activated areas at the shield (reference nuclide, nuclide vector in the barite concrete and horizontal and vertical reduction behaviors of activity concentration) and the activation profiles within the biological shield for unrestricted release, release restricted to permanent deposit and radioactive waste are presented. Considerations of located activation anomalies in the shield, e. g. in the vicinities of the beam-tubes, were made according to the reactor's operational history. Finally, an overview of the materials removed from the biological shield is given. (author)

  7. Status report on the core conversion of the ASTRA-reactor

    International Nuclear Information System (INIS)

    The core conversion from HEU-fuel to LEU-fuel of the ASTRA-Reactor, a pool type research reactor with a thermal power of 10 MW, was started in 1982. In the beginning of the conversion MEU-fuel elements with UAlx-Al fuel and LEU-fuel elements with U3O8-Al fuel were successfully tested. Since 1985 only LEU-fuel elements with U3Si2-Al fuel were used. The HEU-fuel elements in the core were successively replaced by LEU-fuel elements. At the present time there are still 5 HEU-fuel elements in the core. The conversion will be finished in 1990. (orig.)

  8. Decommissioning of the ASTRA research reactor: Dismantling the auxiliary systems and clearance and reuse of the buildings

    Directory of Open Access Journals (Sweden)

    Meyer Franz

    2008-01-01

    Full Text Available The paper presents work performed in the last phase of the decommissioning of the ASTRA research reactor at the Austrian Research Centers Seibersdorf. Dismantling the pump room installations and the ventilation system, as well as the clearance of the buildings is described. Some conclusions and summary data regarding the timetable, material management, and the cost of the entire project are also presented.

  9. Robalzotan AstraZeneca.

    Science.gov (United States)

    Mucke, H A

    2000-10-01

    AstraZeneca (formerly Astra) is developing robalzotan, a 5-HT1A antagonist, for the potential treatment of depression and anxiety. The compound has entered phase II trials, and NDA and MAA filings are expected after 2003 [352095,377656]. In August 2000, Lehman Brothers predicted that the compound had a 20% probability of reaching the market, with a predicted launch date of 2005 [384880]. PMID:11249580

  10. Decommissioning of the research reactor ASTRA in Seibersdorf, Austria: Determination of exemption limits at the Barite-concrete of the neutron activated biological shield to minimize radioactive waste

    International Nuclear Information System (INIS)

    The 10 MW multipurpose M.T.R. research reactor ASTRA at Arcs was in successful operation for 39 years (1960 to 1999) and after the decision of the government to shut it down it was necessary to decommission and dismantle the reactor. A team consisting of former reactor crew staff members was set up to perform the decommissioning. Working instructions for handling and operating sequences and radiation protection were developed. An extensive documentation describes the project. The planning took into account that all the work and operations for decommissioning could be performed inside the existing buildings (confinement or pump room) with the ventilation and radiological monitoring systems in operation. Hence, virtually no possibility for a release of activity to the environment during the whole decommissioning process would exist. In immediate succession and still under the operating license, all experimental facilities and components of the reactor within the vicinity of the core or in intermediate storage within the building (e.g. old beam-tube-inserts) were removed and treated in a first stage of dismantling from 2001 to 2003. In 2002 an environmental impact statement was prepared, the public hearing was held on December 19, 2002 to be followed by a license to decommission, which was granted on April 08, 2003 and was legalized in May 2003. It was intended to take down the structures of the biological shield by cutting blocks of between 7 and 9 tons (limited by the 10-ton-capacity of the crane) from the inactive zones in multiple section planes using wire-cutting techniques, and to get clearance for the material by referencing the surfaces and by additional internal probing.Actual work on the second state of dismantling could only be started after May 2003. It comprised the dismantling of the primary and secondary cooling facilities and the removal of he upper, inactive part of the biological shield (roughly 1600 tons).A building directly attached to the reactor

  11. Ximelagatran (AstraZeneca).

    Science.gov (United States)

    Hopfner, Rob

    2002-02-01

    AstraZeneca (formerly Astra) is developing ximelagatran, an orally active thrombin inhibitor and prodrug of melagatran, for the potential prevention and treatment of venous thromboembolism (VTE) in hip and knee replacement, for prevention of stroke in atrialfibrillation (AF) and for post acute coronary syndrome. As of December 1999, the compound was undergoing phase III trials for the prevention of VTE [349551]; these were ongoing in December 2001. By December 2000, ximelagatran had entered phase III trials for the prevention of stroke in atrial fibrillation [395212]. In September 2000, the company expected global NDA filing for this indication to take place in the middle of 2001 [383469]; however, in December 2000 this was revised to the second half of 2002 [395212], and in March 2001, to the second quarter of 2003 [402040], [416882], [431673]. By December 2000, a phase II trial was underway of ximelagatran as a potential treatment following myocardial infarction [395237]. In December 2001, early phase clinical trials were ongoing for post acute coronary syndrome [431673]. By December 2001, EU and US filings for VTE prevention were anticipated in the third quarter of 2002 and the second quarter of 2003, respectively [3144721, [350050], [431673]. Exanta is the trade name for both melagatran and ximelagatran. In 1998, marketing of ximelagatran in the US was to be assigned to the Astra/Merek joint marketing venture, prior to the merger [276577]. In April 1999, ABN predicted sales of 4 pounds million in 2003 [328676], [394606]. In December 2000, Lehman Brothers estimated peak sales to be $1.4 billion [394606]. At the same time, ABN-AMRO predicted peak sales of more than $1 billion [395237]. In June 2000, Deutsche Bank predicted sales of $70 million in 2002, rising to $245 million in 2003 [374500]. In September 2000, Merrill Lynch predicted sales of 125 pounds million in 2002, rising to 625 pounds million in 2004 [383742]. In February 2001, Merrill Lynch estimated that

  12. Fulvestrant (AstraZeneca).

    Science.gov (United States)

    Johnston, Stephen R D

    2002-02-01

    Fulvestrant (Faslodex) is an estrogen receptor (ER) downregulator under development by AstraZeneca for the potential treatment of breast cancer [172191], [237518], [314472], [349551]. In March 2001, an NDA was filed in the US for the second-line treatment of advanced breast cancer in postmenopausal women who have progressed on prior hormonal therapy [403574], [434825]; in December 2001, AstraZeneca was expecting to launch the compound in the US in thefirst half of 2002 [431887]. In August 2001, late-stage clinical trials were ongoing in Japan for breast cancer [422343]. Fulvestrant also has potential in the treatment of other estrogen-responsive tumors, such as uterine tumors [178081]. By 1997, fulvestrant was in phase II trials for uterine fibroids [272162], and by February 1999, it was reported that phase II trials for endometriosis were ongoing [314472], [336599]. However, no development has been reported for these indications since that time. In October 2001, Morgan Stanley expected launch in 2002, with estimated sales of $80 million in 2002 rising to $208 million in 2007 [429700]. Analysts at Lehman Brothers predicted in December 2001, that the product has a 90% chance of making it to market in 2002, with peak sales potential in this year of $800 million [434768]. PMID:12020064

  13. Cangrelor AstraZeneca.

    Science.gov (United States)

    Chattaraj, S C

    2001-02-01

    AstraZeneca is developing the P2T (P2YADP) purinoceptor antagonist and platelet aggregation inhibitor, cangrelor, for the potential treatment of unstable angina and as an ultrafast-acting intravenous antithrombotic agent. It is in phase IIb clinical trials [315723]. NDA and MAA applications are planned for after 2003 [275466], [314472]. It superseded the earlier compound, ARL-67085, which also reached phase II trials [328760]. In ex vivo samples of angina patients' blood, cangrelor inhibits platelet/monocyte conjugate development, which indicate the drug has some degree of disease-modifying activity [377418]. AstraZeneca is also developing derivatives of cangrelor. Removal of the triphosphate side chain, modification of the ribose to a carbocycle and the purine to a triazolopyridine resulted in a potent (IC50 = 4 nM) orally-active P2T/P2Y12 receptor antagonist. A lead compound was scheduled to enter trials as an antithrombotic agent in July 2000 [377666]. In March 1999, Lehman Brothers predicted a 30% probability that the drug would reach world markets and would be launched in 2002 [336599]. PMID:11816839

  14. Neutronic computational modeling of the ASTRA critical facility using MCNPX

    International Nuclear Information System (INIS)

    The Pebble Bed Very High Temperature Reactor is considered as a prominent candidate among Generation IV nuclear energy systems. Nevertheless the Pebble Bed Very High Temperature Reactor faces an important challenge due to the insufficient validation of computer codes currently available for use in its design and safety analysis. In this paper a detailed IAEA computational benchmark announced by IAEA-TECDOC-1694 in the framework of the Coordinated Research Project 'Evaluation of High Temperature Gas Cooled Reactor (HTGR) Performance' was solved in support of the Generation IV computer codes validation effort using MCNPX ver. 2.6e computational code. In the IAEA-TECDOC-1694 were summarized a set of four calculational benchmark problems performed at the ASTRA critical facility. Benchmark problems include criticality experiments, control rod worth measurements and reactivity measurements. The ASTRA Critical Facility at the Kurchatov Institute in Moscow was used to simulate the neutronic behavior of nuclear pebble bed reactors. (Author)

  15. The Opel Astra convertible; Das Opel Astra Cabrio

    Energy Technology Data Exchange (ETDEWEB)

    Kroehle, F.; Kroll, A. [Internationales Technisches Entwicklungszentrum (ITEZ), Opel, Ruesselsheim (Germany)

    2001-06-01

    With its new Astra Convertible, Opel is continuing the cooperation with the Bertone company that began in 1985. Like its two forerunners, this elegant convertible will be built in Italy. The new model is notable for its torsionally rigid body and the three-layer soft top with electro-hydraulic mechanism that is fitted to all versions, and includes a heated glass rear window. The Astra Convertible has been conceived as a model for all-year-round use: It seats four, has a 330 l trunk and can be powered by one of three smooth-running Ecotec engines developing up to 108 horsepower. (orig.) [German] Mit dem neuen Astra Cabrio fuehrt Opel die bereits 1985 begonnene erfolgreiche Zusammenarbeit mit Bertone fort: Das elegante Cabriolet wird - wie seine beiden Vorgaenger - in Italien gefertigt. Es zeichnet sich durch eine verwindungssteife Karosserie und ein in allen Varianten elektrohydraulisch betaetigtes, dreilagiges Verdeck mit heizbarer Glasheckscheibe aus. Das Astra Cabrio ist als Ganzjahres-Modell konzipiert: Es bietet Platz fuer vier Personen und hat einen 330 l grossen Gepaeckraum. Drei laufruhige Ecotec-Triebwerke mit bis zu 108 kW stehen zur Verfuegung. (orig.)

  16. ZD-0473 AstraZeneca.

    Science.gov (United States)

    Hay, M P

    2000-10-01

    ZD-0473 (formerly JM-473 and AMD-473) is a sterically hindered platinum (II) complex designed and synthesized by Johnson Matthey Technology and the Cancer Research Campaign (CRC) and under development as a potential treatment for cisplatin-resistant cancer. AstraZeneca is developing both an i.v. and an oral formulation of ZD-0473. In December 1999 the i.v. formulation entered phase II clinical trials for the potential treatment of solid tumors; the oral formulation is undergoing preclinical development [351298,349551]. AstraZeneca expects to file for registration of the drug in the fourth quarter of 2002 [377656]. Phase I clinical trials for the potential treatment of a range of solid tumors, including colorectal cancer were carried out jointly by AnorMED (a subsidiary of Johnson Matthey) and the CRC at the Royal Marsden Hospital, UK [301848,315489,337657]. AstraZeneca has licensed ZD-0473 from AnorMED and is responsible for the worldwide development of the drug beyond phase I trials [337540]. Phase I trials to determine the maximum tolerated dose in patients, the nature of the dose-limiting toxicity and the pharmacokinetics of the drug commenced in the US in November 1999 [347964]. In June 2000, Deutsche Bank predicted sales of US $15 million in 2003 [374500]. In March 1999, Lehman Brothers predicted a 15% probability that the drug would reach worldwide markets, and be launched onto the market in 2003 [336599]. PMID:11249584

  17. Evaluation of High Temperature Gas Cooled Reactor Performance: Benchmark Analysis Related to the PBMR-400, PBMM, GT-MHR, HTR-10 and the ASTRA Critical Facility

    International Nuclear Information System (INIS)

    The IAEA has facilitated an extensive programme that addresses the technical development of advanced gas cooled reactor technology. Included in this programme is the coordinated research project (CRP) on Evaluation of High Temperature Gas Cooled Reactor (HTGR) Performance, which is the focus of this TECDOC. This CRP was established to foster the sharing of research and associated technical information among participating Member States in the ongoing development of the HTGR as a future source of nuclear energy. Within it, computer codes and models were verified through actual test results from operating reactor facilities. The work carried out in the CRP involved both computational and experimental analysis at various facilities in IAEA Member States with a view to verifying computer codes and methods in particular, and to evaluating the performance of HTGRs in general. The IAEA is grateful to China, the Russian Federation and South Africa for providing their facilities and benchmark programmes in support of this CRP.

  18. Transport with Astra in TJ-II

    International Nuclear Information System (INIS)

    This report describes the adaptation of the numerical transport shell ASTRA for performing plasma calculations in the TJ-II stellarator device. Firstly, an approximation to the TJ-II geometry is made and a simple transport model is shared with two other codes in order to compare these codes (PROCTR, PRETOR-Stellarator) with ASTRA as calculation tool for TJ-II plasmas are provided: interpretative and predictive transport. The first consists in estimating the transport coefficients from real experimental data, thes being taken from three TJ-II discharges. The predictive facet is illustrated using a model that is able to includes self-consistently the dynamics of transport barriers. The report includes this model, written in the ASTRA programming language, to illustrate the use of ASTRA. (Author) 26 refs

  19. Evaluation of the analysis models in the ASTRA nuclear design code system

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Nam Jin; Park, Chang Jea; Kim, Do Sam; Lee, Kyeong Taek; Kim, Jong Woon [Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)

    2000-11-15

    In the field of nuclear reactor design, main practice was the application of the improved design code systems. During the process, a lot of basis and knowledge were accumulated in processing input data, nuclear fuel reload design, production and analysis of design data, et al. However less efforts were done in the analysis of the methodology and in the development or improvement of those code systems. Recently, KEPO Nuclear Fuel Company (KNFC) developed the ASTRA (Advanced Static and Transient Reactor Analyzer) code system for the purpose of nuclear reactor design and analysis. In the code system, two group constants were generated from the CASMO-3 code system. The objective of this research is to analyze the analysis models used in the ASTRA/CASMO-3 code system. This evaluation requires indepth comprehension of the models, which is important so much as the development of the code system itself. Currently, most of the code systems used in domestic Nuclear Power Plant were imported, so it is very difficult to maintain and treat the change of the situation in the system. Therefore, the evaluation of analysis models in the ASTRA nuclear reactor design code system in very important.

  20. Science with the Keck Interferometer ASTRA Program

    CERN Document Server

    Eisner, J A; Colavita, M; Ghez, A; Graham, J; Hillenbrand, L; Millan-Gabet, R; Monnier, J D; Pott, J -U; Ragland, S; Wizinowich, P; Woillez, J

    2010-01-01

    The ASTrometric and phase-Referenced Astronomy (ASTRA) project will provide phase referencing and astrometric observations at the Keck Interferometer, leading to enhanced sensitivity and the ability to monitor orbits at an accuracy level of 30-100 microarcseconds. Here we discuss recent scientific results from ASTRA, and describe new scientific programs that will begin in 2010-2011. We begin with results from the "self phase referencing" (SPR) mode of ASTRA, which uses continuum light to correct atmospheric phase variations and produce a phase-stabilized channel for spectroscopy. We have observed a number of protoplanetary disks using SPR and a grism providing a spectral dispersion of ~2000. In our data we spatially resolve emission from dust as well as gas. Hydrogen line emission is spectrally resolved, allowing differential phase measurements across the emission line that constrain the relative centroids of different velocity components at the 10 microarcsecond level. In the upcoming year, we will begin dua...

  1. Transport with Astra in TJ-II; Transporte con Astra en TJ-II

    Energy Technology Data Exchange (ETDEWEB)

    Lopez-Bruna, D.; Castejon, F.; Fontdecaba, J. M.

    2004-07-01

    This report describes the adaptation of the numerical transport shell ASTRA for performing plasma calculations in the TJ-II stellarator device. Firstly, an approximation to the TJ-II geometry is made and a simple transport model is shared with two other codes in order to compare these codes (PROCTR, PRETOR-Stellarator) with ASTRA as calculation tool for TJ-II plasmas are provided: interpretative and predictive transport. The first consists in estimating the transport coefficients from real experimental data, thes being taken from three TJ-II discharges. The predictive facet is illustrated using a model that is able to includes self-consistently thedynamics of transport barriers. The report includes this model, written in the ASTRA programming language, to illustrate the use of ASTRA. (Author) 26 refs.

  2. Control-oriented Automatic System for Transport Analysis (ASTRA)-Matlab integration for Tokamaks

    International Nuclear Information System (INIS)

    The exponential growth in energy consumption has led to a renewed interest in the development of alternatives to fossil fuels. Between the unconventional resources that may help to meet this energy demand, nuclear fusion has arisen as a promising source, which has given way to an unprecedented interest in solving the different control problems existing in nuclear fusion reactors such as Tokamaks. The aim of this manuscript is to show how one of the most popular codes used to simulate the performance of Tokamaks, the Automatic System For Transport Analysis (ASTRA) code, can be integrated into the Matlab-Simulink tool in order to make easier and more comfortable the development of suitable controllers for Tokamaks. As a demonstrative case study to show the feasibility and the goodness of the proposed ASTRA-Matlab integration, a modified anti-windup Proportional Integral Derivative (PID)-based controller for the loop voltage of a Tokamak has been implemented. The integration achieved represents an original and innovative work in the Tokamak control area and it provides new possibilities for the development and application of advanced control schemes to the standardized and widely extended ASTRA transport code for Tokamaks. -- Highlights: → The paper presents a useful tool for rapid prototyping of different solutions to deal with the control problems arising in Tokamaks. → The proposed tool embeds the standardized Automatic System For Transport Analysis (ASTRA) code for Tokamaks within the well-known Matlab-Simulink software. → This allows testing and combining diverse control schemes in a unified way considering the ASTRA as the plant of the system. → A demonstrative Proportional Integral Derivative (PID)-based case study is provided to show the feasibility and capabilities of the proposed integration.

  3. ZD-1839 (AstraZeneca).

    Science.gov (United States)

    Norman, P

    2001-03-01

    AstraZeneca is developing ZD-1839, an inhibitor of epidermal growth factor receptor 1 (EGFR1) tyrosine kinase, for potential treatment of cancers which overexpress EGF receptors, including non-small cell lung cancer (NSCLC) and pancreatic cancer [196279], [270898]. Phase III studies had started by August 2000 [349551], [350295], [353050], [377656], with first results being expected at the 2001 meetings of the American Association for Cancer Research (AACR) and the American Society for Clinical Oncology (ASCO). The US FDA has issued ZD-1839 with Fast Track status [350295], [353050]. In September 2000, the company expected global NDA filing to take place at the end of 2001, with launch in the next four to five years [383469]. In January 1999, ABN Amro predicted sales of US $25 million in 2004 rising to $82 million in 2005 [316250]. In March 1999, Lehman Brothers predicted a 30% probability that the drug would reach worldwide markets and be launched onto the market in 2004 [336599]. In June 2000, Deutsche Bank predicted sales of US $8 million in 2002, rising to $100 million in 2003 [374500]. In September 2000, analysts Merrill Lynch predicted a launch in 2002 with sales estimated at UK 50 million pounds, rising to 360 million pounds in 2004, while in December 2000, the analysts predicted a filing date in the fourth quarter of 2001 [383742], [396280]. Also in December 2000, Lehman Brothers predicted a filing date late in 2001, and a possible Fast Track review. They also estimated peak sales of US $1 billion [394606]. PMID:11575718

  4. Cumulative survival rate of Astra Tech implants: a retrospective analysis

    OpenAIRE

    Kim, Jung-Soo; Sohn, Joo-Yeon; Park, Jung-Chul; Jung, Ui-Won; Kim, Chang-Sung; Lee, Jae-Hoon; Shim, June-Sung; Lee, Keun-Woo; Choi, Seong-Ho

    2011-01-01

    Purpose The aim of this study was to analyze the short-term predictability and reliability of Astra Tech implants according to the demographical distribution of patients and condition of implant sites and location of implants. Methods Among patients treated with Astra Tech implant (Astra Tech AB) in the Department of Periodontology at the Dental Hospital of Yonsei University of College of Dentisry and K Dental Clinic from May 2004 to March 2009, 195 implants in 98 patients which had been rest...

  5. ZD-9331 AstraZeneca.

    Science.gov (United States)

    Niculescu-Duvaz, I

    2000-09-01

    AstraZeneca (formerly Zeneca) is developing ZD-9331, a non-polyglutamatable thymidylate synthase inhibitor, as a potential treatment for solid tumors and other neoplasia, including colorectal tumors [216476,179954,179955]. ZD-9331 is being developed as both an oral and an i.v. formulation, both of which are in phase II trials as of December 1999 [349551,352095]. As of June 1998, ZD-9331 was in phase II trials for advanced colorectal and other solid tumors [315489], with drug filings not expected until 2002 [349551]. A clinical study presented at the 36th Annual Meeting of the American Society of Clinical Oncology (ASCO) demonstrated that treatment with ZD-9331 resulted in a period of intracellular 2'-deoxyuridine (dUrd) elevation, a surrogate marker of thymidylate synthase inhibition, with observed myelosuppression being no greater than that seen with raltitrexed and less than with bolus 5-FU [369475]. Results from a 56-patient phase I study were presented at the 1999 ASCO meeting. Dose escalation followed a two-stage procedure. As in previous studies myelosuppression was the dose-limiting toxicity, occurring at 4.8 and 7.5 mg/m2/day, with one patient at each of these two doses experiencing a DLT. The MTD was not achieved until 12 to 16 mg/m2/day, based on which a fixed dose of 25 mg/day was being evaluated [326935]. A number of other studies are ongoing, comparing once to twice daily dosages as well as the pharmacokinetics of the compound. Encouraging phase I data have been seen in melanoma, ovarian, colon and breast cancer; myelosuppression is the dose limiting toxicity in the majority of these studies [326938,326943,326945,327399]. A phase I dose-escalation trial was conducted to evaluate the feasibility of a once 3-weekly 30-min i.v. infusion of ZD-9331, with doses ranging from 4.8 to 370 mg/m2. The regimen was overall well tolerated up to 370 mg/m2, with grade IV myelosuppression and grade IV diarrhea being observed in a small number of patients [288959

  6. Research reactors in Austria - Present situation

    International Nuclear Information System (INIS)

    In the past decades Austria operated three research reactors, the 10 MW ASTRA reactor at Seibersdorf, the 250 kW TRIGA reactor at the Atominstitut and the 1 kW Argonaut reactor at the Technical University in Graz. Since the shut down of the ASTRA on July 31th, 1999 and its immediate decommissioning reactor and the shut down of the Argonaut reactor in Graz on August 31st, 2004 only one reactor remains operational for keeping nuclear competence in Austria which is the 250 kW TRIGA Mark II reactor. (author)

  7. Benchmark verification of the KARMA/ASTRA code with OECD/NEA and U.S.NRC PWR MOX/UO2 transient problem

    International Nuclear Information System (INIS)

    We have developed ASTRA (Advanced Static and Transient Reactor Analyzer) for designing commercial reactor core. ASTRA is a multi-group nodal code for analyzing steady-state characteristics and transient core behaviors in a three dimensional Cartesian geometry based on the multigroup diffusion theory. For the purpose of verifying the function of multi-group transient analysis in KARMA/ASTRA code system, the benchmark analysis has been performed with the PWR MOX/UO2 control rod ejection problem provided by OECD/NEA and U.S. NRC. The results calculated from the reference cross section data showed that ASTRA has a good performance in the two-group and the multi-group transient problems despite the difference of nodal method and thermal hydraulic feedback model. When using the cross section generated by KARMA from heterogeneous model, the rod worth and the reactivity were considerably different to the reference values, because of the significant difference of the cross sections. This discrepancy led to the lower peak power comparing with the reference solution. Except the differences based on the different cross section data, it is concluded that ASTRA has reasonable performance from this benchmark analysis. (authors)

  8. Peripheral Codes in ASTRA for the TJ-II

    International Nuclear Information System (INIS)

    The study of data from the TJ-II device is often done with transport calculations based on the ASTRA transport system. However, complicated independent codes are used to obtain fundamental ingredients in these calculations, such as the particle and/or energy sources. These codes are accessible from ASTRA through the procedures explained in this report. (Author) 37 refs.

  9. Peripheral Codes in ASTRA for the TJ-II; Programas Perifericos de ASTRA para el TJ-II

    Energy Technology Data Exchange (ETDEWEB)

    Lopez-Bruna, D.; Reynolds, J. M.; Cappa, A.; Martinell, J.; Garcia, J.; Gutierrez-Tapia, C.

    2010-05-01

    The study of data from the TJ-II device is often done with transport calculations based on the ASTRA transport system. However, complicated independent codes are used to obtain fundamental ingredients in these calculations, such as the particle and/or energy sources. These codes are accessible from ASTRA through the procedures explained in this report. (Author) 37 refs.

  10. Parallel algorithms on the ASTRA SIMD machine

    International Nuclear Information System (INIS)

    In view of the tremendous computing power jump of modern RISC processors the interest in parallel computing seems to be thinning out. Why use a complicated system of parallel processors, if the problem can be solved by a single powerful micro-chip. It is a general law, however, that exponential growth will always end by some kind of a saturation, and then parallelism will again become a hot topic. We try to prepare ourselves for this eventuality. The MPPC project started in 1990 in the keydeys of parallelism and produced four ASTRA machines (presented at CHEP's 92) with 4k processors (which are expandable to 16k) based on yesterday's chip-technology (chip presented at CHEP'91). These machines now provide excellent test-beds for algorithmic developments in a complete, real environment. We are developing for example fast-pattern recognition algorithms which could be used in high-energy physics experiments at the LHC (planned to be operational after 2004 at CERN) for triggering and data reduction. The basic feature of our ASP (Associate String Processor) approach is to use extremely simple (thus very cheap) processor elements but in huge quantities (up to millions of processors) connected together by a very simple string-like communication chain. In this paper we present powerful algorithms based on this architecture indicating the performance perspectives if the hardware quality reaches present or even future technology levels. (author)

  11. Pengaruh Kualitas Pelayanan Dan Kepuasan Konsumen Terhadap Loyalitas Konsumen PT. Toyota Astra Financial Service Medan

    OpenAIRE

    Purba, Nona Erika

    2012-01-01

    Formulation of the problem in this study is to what extent the influence of service quality: reliability, responsiveness, assurance, empathy and physical evidence of customer satisfaction PT. Toyota Astra Financial Service Field, the influence of customer satisfaction on consumer loyalty PT. Toyota Astra Financial Service Field and the influence of service quality and customer satisfaction to customer loyalty PT. Toyota Astra Financial Service Field. The purpose of this study is to investigat...

  12. 77 FR 24723 - AstraZeneca Pharmaceuticals LP; Withdrawal of Approval of a New Drug Application for IRESSA

    Science.gov (United States)

    2012-04-25

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration AstraZeneca Pharmaceuticals LP; Withdrawal of Approval of a... IRESSA (gefitinib) Tablets held by AstraZeneca Pharmaceuticals LP (AstraZeneca), 1800 Concord Pike,...

  13. Osta Rootsist Ericssoni, Sandviki, AstraZeneca ja H&Mi aktsiaid / Annika Matson

    Index Scriptorium Estoniae

    Matson, Annika, 1976-

    2004-01-01

    Rootsi, Soome ja Eesti analüütikute soovitusi Rootsi ettevõtetesse investeerimiseks. Tabel ja diagrammid: Enim soovitusi said Ericsson, Hennes & Mauritz, AstraZenec ja Sandvik. Vt. samas: Sirje Rank. Naftasheigid ostavad Rootsi aktsiaid

  14. Interruption Management in ubiquitous collaborative environments : developing suitable interaction mechanisms for ASTRA

    OpenAIRE

    Subedi, Tara Nath

    2009-01-01

    ASTRA is a project that aims at studying awareness systems that help people to feel in touch with family and friends even when they are away from their computers and the existing widespread tools of today (IM, skype, twitter,...) are not enough. In this context, this thesis aims at addressing the problem of Interruption management. The focus will be on the design and development of different interaction mechanisms to support the definition of interruption rules as needed in ASTRA. This will ...

  15. Siklus Daur Hidup Mobil Toyota Avanza dan Strategi Pemasaran pada PT Toyota Astra Motor

    OpenAIRE

    Alvi, Zahra Waini

    2013-01-01

    The title of this research is "Life Cycle of Toyota Avanza and Strategic Marketing at PT Toyota Astra Motor". In determining marketing strategy, a company must know step of a product in product life cycle with a purpose to that company can take policy to product in every step, in this case is Toyota Avanza product at PT Toyota Astra Motor. At this research, applied marketing strategy based on product life cycle developed with marketing mix ( product, price, place, and promotion). This stud...

  16. Limited streamer chamber testing and quality evaluation in ASTRA

    International Nuclear Information System (INIS)

    Limited streamer chambers are extensively used for high-energy and nuclear physics experiments in accelerator and underground laboratories. The tracking system of LVD, an underground experiment to study muons and nutrino astronomy, will use roughly 15000 limited streamer chambers and 100000 external pickup strips with digital readout electronics. In the article the different aspects of chamber operation that serve to establish a testing procedure and to define acceptance criteria for selecting reliable and long-life devices, are discussed. The procedures and the results obtained from a long-term test to evaluate streamer chamber quality, based upon a sample of 2900 items, are described. The selection tests and the long-term observations have been performed in the ASTRA laboratory, established at the Laboratori Nazionali di Frascati to carry out quality control procedures for streamer chambers on a large scale and in a controlled environment

  17. Geometry of the TJ-II in Astra 6.0; Geometria del TJ-II en Astra 6.0

    Energy Technology Data Exchange (ETDEWEB)

    Lopez-Bruna, D.; Romero, J.A.; Castejon, F.

    2006-07-01

    One of the most exploited features of the TJ-II Heliac, a facility in the Laboratorio Nacional de Fusion (CIEMAT, Madrid), is its ability to explore plasmas in different magnetic configurations. For this reason, there are available libraries that provide the metrics and associated magnitudes for many among all possible configurations. On the other hand, the transport codes that can normally be used to perform transport calculations cannot dea properly with these geometries, which is especially delicate when there are induced plasma currents. In the present work we adopt ASTRA, a transport analysis shell, to study the approximations performed when calculations that impose axi-symmetry (as ASTRA does) are performed on magnetic configurations that are not really axi-symmetric. After describing how we obtain those TJ-II metric averages that must be set in ASTRA, we perform two comparisons: (i) we obtain the vacuum rotational transform as deduced from the metric coefficients but imposing axisymmetry, and compare the results with the rotational transform yielded by the existing libraries; and (ii) we build a ID transport code with TJ-II metrics so its results can be compared with those of ASTRA. In both cases, the differences found indicate that evaluating the evolution of the rotational transform under ohmic induction and transport evolution is acceptable assuming that the geometry itself does not evolve. (Author) 11 refs.

  18. The ASTRA Toolbox: A platform for advanced algorithm development in electron tomography

    Energy Technology Data Exchange (ETDEWEB)

    Aarle, Wim van, E-mail: wim.vanaarle@uantwerpen.be [iMinds-Vision Lab, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk (Belgium); Palenstijn, Willem Jan, E-mail: willemjan.palenstijn@uantwerpen.be [iMinds-Vision Lab, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk (Belgium); Centrum Wiskunde & Informatica, Science Park 123, NL-1098 XG Amsterdam (Netherlands); De Beenhouwer, Jan, E-mail: jan.debeenhouwer@uantwerpen.be [iMinds-Vision Lab, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk (Belgium); Altantzis, Thomas, E-mail: thomas.altantzis@uantwerpen.be [Electron Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan 171, B-2020 Wilrijk (Belgium); Bals, Sara, E-mail: sara.bals@uantwerpen.be [Electron Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan 171, B-2020 Wilrijk (Belgium); Batenburg, K. Joost, E-mail: joost.batenburg@cwi.nl [iMinds-Vision Lab, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk (Belgium); Centrum Wiskunde & Informatica, Science Park 123, NL-1098 XG Amsterdam (Netherlands); Mathematical Institute, Leiden University, P.O. Box 9512, NL-2300 RA Leiden (Netherlands); Sijbers, Jan, E-mail: jan.sijbers@uantwerpen.be [iMinds-Vision Lab, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk (Belgium)

    2015-10-15

    We present the ASTRA Toolbox as an open platform for 3D image reconstruction in tomography. Most of the software tools that are currently used in electron tomography offer limited flexibility with respect to the geometrical parameters of the acquisition model and the algorithms used for reconstruction. The ASTRA Toolbox provides an extensive set of fast and flexible building blocks that can be used to develop advanced reconstruction algorithms, effectively removing these limitations. We demonstrate this flexibility, the resulting reconstruction quality, and the computational efficiency of this toolbox by a series of experiments, based on experimental dual-axis tilt series. - Highlights: • The ASTRA Toolbox is an open platform for 3D image reconstruction in tomography. • Advanced reconstruction algorithms can be prototyped using the fast and flexible building blocks. • This flexibility is demonstrated on a common use case: dual-axis tilt series reconstruction with prior knowledge. • The computational efficiency is validated on an experimentally measured tilt series.

  19. The ASTRA Toolbox: A platform for advanced algorithm development in electron tomography

    International Nuclear Information System (INIS)

    We present the ASTRA Toolbox as an open platform for 3D image reconstruction in tomography. Most of the software tools that are currently used in electron tomography offer limited flexibility with respect to the geometrical parameters of the acquisition model and the algorithms used for reconstruction. The ASTRA Toolbox provides an extensive set of fast and flexible building blocks that can be used to develop advanced reconstruction algorithms, effectively removing these limitations. We demonstrate this flexibility, the resulting reconstruction quality, and the computational efficiency of this toolbox by a series of experiments, based on experimental dual-axis tilt series. - Highlights: • The ASTRA Toolbox is an open platform for 3D image reconstruction in tomography. • Advanced reconstruction algorithms can be prototyped using the fast and flexible building blocks. • This flexibility is demonstrated on a common use case: dual-axis tilt series reconstruction with prior knowledge. • The computational efficiency is validated on an experimentally measured tilt series

  20. Dyson Dots & Geoengineering: The Killer App Ad Astra

    Science.gov (United States)

    Kennedy, R. G.; Hughes, Eric; Roy, Kenneth I.; Fields, David E.

    No study of coping with climate change is complete without considering geoengineering. A "Dyson Dot" is one or more large (area ~700 K km2, >200 megatonne) lightsail(s) in a radiation-levitated non-Keplerian orbit(s) just sunward of the Sun-Earth Lagrange-1 point. The purpose of this syncretic concept is twofold: (I) As a parasol, it would reduce insolation on Earth by at least one-quarter of a percent (-3.4 W m-2), same as what caused 1.5°C drop during the "Little Ice Age" (~1550-1850) and same as the IPCC Third Report's mid-range value for global warming by 2050. The parasol transforms the "solar constant" to a controlled solar variable. (II) Hosting a ~50K km2 photovoltaic power station on its sunny side and relaying beamed power via maser to rectennas on a circumpolar Dymaxion grid, the system could displace over 300 EJ/a (~100 trillion kWh/yr) of fossil-fired power (total global demand for electricity forecast by 2050), while providing USD trillions in revenue from cheap clean energy sales (@1-3¢/kWh) to amortize the scheme. Total system efficiency compares favorably to automobiles; total system power density is comparable to nuclear power. This approach -- self-funding, "pay-as-you-go", minimally intrusive, scalable, complementary with a portfolio of other measures and above all reversible is not precluded by international treaty. Indeed geoengineering may be the best "killer app" to bootstrap orbital industry and humanity ad astra, because the terawattscale product is comparable to the power required for interstellar travel. If Tellurian spacefaring civilization bootstraps its exponential growth with multi-terawatt maser beams from such lightsails, there might eventually be enough of them to have a detectable effect on Sol's apparent luminosity at certain wavelengths, as seen from far away, similar to the eponymous Dyson Sphere, hence the moniker.

  1. Marginal tissue response adjacent to Astra Dental Implants supporting overdentures in the mandible

    DEFF Research Database (Denmark)

    Gotfredsen, K; Holm, B; Sewerin, I;

    1993-01-01

    The aim of this study was to evaluate the marginal tissue response adjacent to implant supported overdentures. Twenty edentulous patients had 2 Astra Dental Implants placed in the canine region of the lower jaw. New overdentures were retained by individual ball attachments in 11 patients and by a...

  2. Geometry of the TJ-II in Astra 6.0

    International Nuclear Information System (INIS)

    One of the most exploited features of the TJ-II Heliac, a facility in the Laboratorio Nacional de Fusion (CIEMAT, Madrid), is its ability to explore plasmas in different magnetic configurations. For this reason, there are available libraries that provide the metrics and associated magnitudes for many among all possible configurations. On the other hand, the transport codes that can normally be used to perform transport calculations cannot dea properly with these geometries, which is especially delicate when there are induced plasma currents. In the present work we adopt ASTRA, a transport analysis shell, to study the approximations performed when calculations that impose axi-symmetry (as ASTRA does) are performed on magnetic configurations that are not really axi-symmetric. After describing how we obtain those TJ-II metric averages that must be set in ASTRA, we perform two comparisons: (i) we obtain the vacuum rotational transform as deduced from the metric coefficients but imposing axisymmetry, and compare the results with the rotational transform yielded by the existing libraries; and (ii) we build a ID transport code with TJ-II metrics so its results can be compared with those of ASTRA. In both cases, the differences found indicate that evaluating the evolution of the rotational transform under ohmic induction and transport evolution is acceptable assuming that the geometry itself does not evolve. (Author) 11 refs

  3. Analisis Model Peramalan Status Kredit Kendaraan Bermotor pada Astra Credit Companies (ACC Cabang X Periode 2011

    Directory of Open Access Journals (Sweden)

    Tomy Gurtama Soemapradja

    2012-04-01

    variable that significantly to the car loan status at Astra Credit Companies (ACC, and further continue to arrange prediction model of loan status and measure its accuracy level.. The statistic test shows there are 2 independent variables affect to dependent variable significantly, where models accuracy level achieves 100%.

  4. Single-tooth replacement by osseointegrated Astra Tech dental implants: a 2-year report

    DEFF Research Database (Denmark)

    Karlsson, U; Gotfredsen, K; Olsson, C

    1998-01-01

    This study presents the outcome of single-tooth restorations supported by Astra Tech single-tooth implants followed for 2 years. Forty-seven implants were placed in the same number of patients. Forty-three patients attended the second recall visit, and none of the evaluated implants have been...

  5. Bauran Pemasaran sebagai Strategi untuk Mempertahankan Pelanggan pada PT Astra Internasional Tbk (AUTO 2000) Gatot Subroto Medan

    OpenAIRE

    Silaen, Devi Yanti

    2012-01-01

    One key to success in the relationship between the company and its customers is through the marketing mix. PT Astra International Tbk (Auto 2000) Gatot Subroto Medan is one of the companies using the marketing mix as a strategy to retain customers. Based on the above researchers interested in conducting research with the title "Marketing Mix as a strategy to maintain the Customer at PT Astra International Tbk (Auto 2000) Gatot Subroto Medan". Purpose of this study was to determine the extent ...

  6. Analisis Persediaan Mesin Fotokopi Merek Xerox Dalam Kaitannya Dengan Sistem Pengendalian Manajemen Pada PT Astra Graphia, Tbk

    OpenAIRE

    Surbakti, Erika Ameliani

    2011-01-01

    Erika Ameliani Surbakti, 2011, Inventory Analysis Xerox Copier Brand in Relation to Management Control Systems in PT Astra Graphia, Tbk, under the Guidance of Prof. Dr. Ir. A. Rahim Matondang, MSIE., (Chairman), and Dr. Arlina Nurbaity Lubis, MBA., (Member). The increasing of business competition and products quality of competitors urge PT Astra Graphia Tbk to enhance other aspects of business to remain a leader in current business. Errors in determining the amount of inventory will result...

  7. Reactors

    International Nuclear Information System (INIS)

    Purpose: To provide a spray cooling structure wherein the steam phase in a bwr reactor vessel can sufficiently be cooled and the upper cap and flanges in the vessel can be cooled rapidly which kept from direct contaction with cold water. Constitution: An apertured shielding is provided in parallel spaced apart from the inner wall surface at the upper portion of a reactor vessel equipped with a spray nozzle, and the lower end of the shielding and the inner wall of the vessel are closed to each other so as to store the cooling water. Upon spray cooling, cooling water jetting out from the nozzle cools the vapor phase in the vessel and then hits against the shielding. Then the cooling water mostly falls as it is, while partially enters through the apertures to the back of the shielding plate, abuts against stoppers and falls down. The stoppers are formed in an inverted L shape so that the spray water may not in direct contaction with the inner wall of the vessel. (Horiuchi, T.)

  8. Integration of TomoPy and the ASTRA toolbox for advanced processing and reconstruction of tomographic synchrotron data.

    Science.gov (United States)

    Pelt, Daniël M; Gürsoy, Dogˇa; Palenstijn, Willem Jan; Sijbers, Jan; De Carlo, Francesco; Batenburg, Kees Joost

    2016-05-01

    The processing of tomographic synchrotron data requires advanced and efficient software to be able to produce accurate results in reasonable time. In this paper, the integration of two software toolboxes, TomoPy and the ASTRA toolbox, which, together, provide a powerful framework for processing tomographic data, is presented. The integration combines the advantages of both toolboxes, such as the user-friendliness and CPU-efficient methods of TomoPy and the flexibility and optimized GPU-based reconstruction methods of the ASTRA toolbox. It is shown that both toolboxes can be easily installed and used together, requiring only minor changes to existing TomoPy scripts. Furthermore, it is shown that the efficient GPU-based reconstruction methods of the ASTRA toolbox can significantly decrease the time needed to reconstruct large datasets, and that advanced reconstruction methods can improve reconstruction quality compared with TomoPy's standard reconstruction method. PMID:27140167

  9. 日本烟草与英国Astra Zeneca共建合资企业

    Institute of Scientific and Technical Information of China (English)

    孙雷心

    2000-01-01

    @@ Nature Biotechnology 1999年17卷5期第411页报道:日本烟草公司(东京)与英国的生命科学巨人Astra Zeneca(London)讨论设立一家合资企业,在日本开发GM农产品.日本烟草公司将借助Astra Zeneca的农业生物技术专家开发新的水稻品种.首先是食用的超级口味品种,其次是饲料用产品,有合资企业向全球经销.公司目前正在开发用来制作sake酒(清酒)的低蛋白含量GM水稻.该公司还参与了水稻基因组项目,到2010年完成水稻基因组测序国际项目.据日本烟草公司称,预计在年底成立新的合资企业.未透露财政详情.

  10. Characterisation of close visual binaries from the AstraLux Large M Dwarf Survey

    CERN Document Server

    Bergfors, C; Bonnefoy, M; Schlieder, J; Janson, M; Henning, Th; Chauvin, G

    2015-01-01

    We present VLT/SINFONI J, H+K spectra of seven close visual pairs in M dwarf binary/triple systems, discovered or observed by the AstraLux M dwarf survey. We determine the spectral types to within 1.0 subclasses from comparison to template spectra and the strength of K-band water absorption, and derive effective temperatures. The results are compared to optical spectral types of the unresolved binary/multiple systems, and we confirm that our photometric method to derive spectral types in the AstraLux M dwarf survey is accurate. We look for signs of youth such as chromospheric activity and low surface gravity, and find an age in the range 0.25-1 Gyr for the GJ 852 system. Strong Li absorption is detected in optical spectra of the triple system J024902 obtained with FEROS at the ESO-MPG 2.2m telescope. The equivalent width of the absorption suggests an age consistent with the beta Pic moving group. However, further observations are needed to establish group membership. Ongoing orbital monitoring will provide dy...

  11. Characterization of close visual binaries from the AstraLux Large M Dwarf Survey

    Science.gov (United States)

    Bergfors, C.; Brandner, W.; Bonnefoy, M.; Schlieder, J.; Janson, M.; Henning, Th.; Chauvin, G.

    2016-03-01

    We present Very Large Telescope/Spectrograph for INtegral Field Observations in the Near Infrared (VLT/SINFONI) J, H + K spectra of seven close visual pairs in M dwarf binary/triple systems, discovered or observed by the AstraLux M dwarf survey. We determine the spectral types to within ±1.0 subclasses from comparison to template spectra and the strength of K-band water absorption, and derive effective temperatures. The results are compared to optical spectral types of the unresolved binary/multiple systems, and we confirm that our photometric method to derive spectral types in the AstraLux M dwarf survey is accurate. We look for signs of youth such as chromospheric activity and low surface gravity, and find an age in the range 0.25-1 Gyr for the GJ 852 system. Strong Li absorption is detected in optical spectra of the triple system J024902 obtained with the Fiberfed Extended Range Optical Spectrograph (FEROS) at the European Southern Observatory (ESO)-Max-Planck-Gesellschaft (MPG) 2.2 m telescope. The equivalent width of the absorption suggests an age consistent with the β Pic moving group. However, further observations are needed to establish group membership. Ongoing orbital monitoring will provide dynamical masses and thus calibration of evolutionary models for low mass stars.

  12. EVALUASI DAN RENCANA PENGEMBANGAN PENERAPAN APLIKASI ENTERPRISE RESOURCE PLANNING (ERP: STUDI KASUS PADA PT ASTRA GRAPHIA

    Directory of Open Access Journals (Sweden)

    Santo F. Wijaya

    2011-11-01

    Full Text Available A firms success in bussiness competition can be supported by integrated information systems. A program application based on Enterprise Resource Planning (ERP like SAP is an integrated program that is able to provide business transaction management solutions. This study aims to on the ERP system running at PT Astra Graphia, particularly at relevant departments dealing with income derived at a period of time and costs associated with implementation and application maintenance of SAP (Systems, Applications and Products in Data Processing program. Furthermore, this study aims to give suggestions based on information systems development evaluation results, in terms of business processes, performance, and financial. Analyses were performed using the IT Balanced Scorecard, and the development of information systems used the Accelerated SAP (ASAP in which the results are able to provide suggestions of system development with the first phase of ASAP method namely preparation and the second phase namely blueprint.

  13. An improved model for fragment-based lead generation at AstraZeneca.

    Science.gov (United States)

    Fuller, Nathan; Spadola, Loredana; Cowen, Scott; Patel, Joe; Schönherr, Heike; Cao, Qing; McKenzie, Andrew; Edfeldt, Fredrik; Rabow, Al; Goodnow, Robert

    2016-08-01

    Modest success rates in fragment-based lead generation (FBLG) projects at AstraZeneca (AZ) prompted operational changes to improve performance. In this review, we summarize these changes, emphasizing the construction and composition of the AZ fragment library, screening practices and working model. We describe the profiles of the screening method for specific fragment subsets and statistically assess our ability to follow up on fragment hits through near-neighbor selection. Performance analysis of our second-generation fragment library (FL2) in screening campaigns illustrates the complementary nature of flat and 3D fragments in exploring protein-binding pockets and highlights our ability to deliver fragment hits using multiple screening techniques for various target classes. The new model has had profound impact on the successful delivery of lead series to drug discovery projects. PMID:27179986

  14. The ASTRA (Ancient instruments Sound/Timbre Reconstruction Application) Project brings history to life!

    Science.gov (United States)

    Avanzo, Salvatore; Barbera, Roberto; de Mattia, Francesco; Rocca, Giuseppe La; Sorrentino, Mariapaola; Vicinanza, Domenico

    ASTRA (Ancient instruments Sound/Timbre Reconstruction Application) is a project coordinated at Conservatory of Music of Parma which aims to bring history to life. Ancient musical instruments can now be heard for the first time in hundreds of years, thanks to the successful synergy between art/humanities and science. The Epigonion, an instrument of the past, has been digitally recreated using gLite, an advanced middleware developed in the context of the EGEE project and research networks such as GÉANT2 in Europe and EUMEDCONNECT2 in the Mediterranean region. GÉANT2 and EUMEDCONNECT2, by connecting enormous and heterogeneous computing resources, provided the needed infrastructures to speed up the overall computation time and enable the computer-intensive modeling of musical sounds. This paper summarizes the most recent outcomes of the project underlining how the Grid aspect of the computation can support the Cultural Heritage community.

  15. The Reproduction of Efficiency Theory: The Construction of the AstraZeneca Merger in the Public Discourse

    OpenAIRE

    Bo Hellgren; Jan Löwstedt; Andreas Werr

    2011-01-01

    Mergers have become a generally accepted solution to a broad set of managerial problems in practice. However,research on mergers and acquisitions provides a rather sceptical view as to the success of mergers in solvingbusiness problems. The current paper aims at investigating the public discourse on mergers and acquisitions andits relation to the scientific discourse. The public discourse is studied by an analysis of Swedish media reports onthe Astra Zeneca merger. More specifically we study ...

  16. ANALISIS KEAKURATAN INDIKATOR BOLLINGER BANDS TERHADAP PERGERAKAN HARGA SAHAM (STUDI KASUS PADA SAHAM PT ASTRA AGRO LESTARI TBK)

    OpenAIRE

    Frankandinata; Yoyo Cahyadi

    2014-01-01

    Technical analysis is an analytical tool to analyze price movement of an investment instrument like stock. Practically, there are a lot of indicators that can be used in technical analysis. One of them is Bolinger Bands. Bolinger Bands has 3 moving averages lines, which are Upper Band, Middle Band, and Lower Band. Study used library research and software review by analyzing the candlestick chart of stock price with ChartNexus software. The stock for this study was Astra Agro Lestari (AALI) an...

  17. PENERAPAN METODE AHP UNTUK SUBSISTEM PENDUKUNG PEMILIHAN SUPPLIER PADA OUTHOUSE COSTING INTEGRATED SYSTEM (OCIS) DI PT ASTRA DAIHATSU MOTOR

    OpenAIRE

    Surjandy; Melva

    2014-01-01

    In general automotive development, especially car, PT Astra Daihatsu Motor (ADM) continuously improves quality and service to supply vehicles in Indonesia. To support the improvement of quality and service, PT ADM continues to improve technology-based system to assist in providing vehicle parts of production process requirements. Therefore Purchasing division is very important in this process. Besides, supplier is a very important role in making and supplying parts for the company...

  18. Vanemad mäletavad / Lain, Janet; Usin, Vello; Usin, Astra; Tiit, Birgit; Kuusk, Eneli; Kuusk, Vilja

    Index Scriptorium Estoniae

    2005-01-01

    Mõisaküla Keskkooli õpilased kogusid 2004. a. sügisel projekti "Mulgi murde päevad Mõisaküla koolis" raames vanemate inimeste mälestusi nende noorpõlvest ja kooliajast. Janet Lain pani kirja vanaisa Vello Usina ja vanaema Astra Usina mälestusi; Birgit Tiit ema Milvi Tiidu mälestusi ja Eneli Kuusk ema Vilja Kuuse mälestusi

  19. Pengaruh Gaya Kepemimpinan Kreatif Untuk Meningkatkan Kinerja Bisnis Pada PT. Astra International Tbk - Toyota Sales Operation Auto (2000)Cabang Medan

    OpenAIRE

    Siallagan, Wawi Jelita

    2013-01-01

    This study aimed to identify an analyze influence of Leadership Creative Style To Increase Business Activity in PT. Astra International, Tbk branch Medan. This type of research is using explanatory associative, this research aims to connects two or more variables. Type of data consist of primary data is data obtained directly from survey respondents though questionnaires in the field an secondary data, the data obtained in the form of ready-made are collected an procesed by the other party. U...

  20. Self-optimisation of the final stage in the synthesis of EGFR kinase inhibitor AZD9291 using an automated flow reactor

    OpenAIRE

    Holmes, N.; Akien, GR; Blacker, AJ; Woodward, RL; Meadows, RE; Bourne, RA

    2016-01-01

    Self-optimising flow reactors combine online analysis with evolutionary feedback algorithms to rapidly achieve optimum conditions. This technique has been applied to the final bond-forming step in the synthesis of AZD9291, an irreversible epidermal growth factor receptor kinase inhibitor developed by AstraZeneca. A four parameter optimisation of a telescoped amide coupling followed by an elimination reaction was achieved using at-line high performance liquid chromatography. Optimisations were...

  1. ANALISIS KEAKURATAN INDIKATOR BOLLINGER BANDS TERHADAP PERGERAKAN HARGA SAHAM (STUDI KASUS PADA SAHAM PT ASTRA AGRO LESTARI TBK

    Directory of Open Access Journals (Sweden)

    Frankandinata

    2014-07-01

    Full Text Available Technical analysis is an analytical tool to analyze price movement of an investment instrument like stock. Practically, there are a lot of indicators that can be used in technical analysis. One of them is Bolinger Bands. Bolinger Bands has 3 moving averages lines, which are Upper Band, Middle Band, and Lower Band. Study used library research and software review by analyzing the candlestick chart of stock price with ChartNexus software. The stock for this study was Astra Agro Lestari (AALI and the period was 1 July 2010 until 31 May 2013. Results showed that Bolinger Bands gave 45 signals in the period with 75.56% accuracy.

  2. A 2-year report on maxillary and mandibular fixed partial dentures supported by Astra Tech dental implants. A comparison of 2 implants with different surface textures

    DEFF Research Database (Denmark)

    Karlsson, U; Gotfredsen, K; Olsson, C

    1998-01-01

    In 50 partially edentulous patients, 133 (48 maxillary; 85 mandibular) Astra Tech dental implants of 2 different surface textures (machined; TiO-blasted) were alternately installed, supporting 52 fixed partial dentures (FPDs). Before abutment connection 2 machined implants (1 mandibular; 1...

  3. Analysis of power excursions in fast reactors with a simple computer routine

    International Nuclear Information System (INIS)

    The energy release during prompt critical power excursions in fast reactors is estimated using a simple method. Reactivity ramps in the operating reactor are postulated. The only feedback mechanisms considered are due to the Doppler coefficient, and due to vapor-pressure driven core disassembly. The core is assumed to be spherical. This very simple model allows inexpensive parameter studies. First, results obtained with the still simpler analytic model by Froehlich and Johnson are duplicated. In the frame of the parameter studies, the reactivity ramp is varied. Cases with different Doppler constants and neutron lifetimes are investigated. The main point, however, is studying excursions for reactors of different sizes, where the ASTRA-Core designs suggested by Siemens are used. One finds that the model predicts high energy release for fast ramps in a large reactor. For the medium-size ASTRA Core (1200 MWth) energy releases are of a magnitude which can probably be contained, if very high ramp rates can be excluded. Furthermore, by admixture of beryllium oxide, the Doppler constant is enhanced and the predicted energy release reduced. It must be emphasized that only scooping results were obtained. For more reliable results, accident analyses with the Codes SAS4A and SIMMER are needed. These codes allow to simulate a number of different phenomena during the complex accident path. However, analyses with these codes are very expensive. (orig.)

  4. The Reproduction of Efficiency Theory: The Construction of the AstraZeneca Merger in the Public Discourse

    Directory of Open Access Journals (Sweden)

    Bo Hellgren

    2011-05-01

    Full Text Available Mergers have become a generally accepted solution to a broad set of managerial problems in practice. However,research on mergers and acquisitions provides a rather sceptical view as to the success of mergers in solvingbusiness problems. The current paper aims at investigating the public discourse on mergers and acquisitions andits relation to the scientific discourse. The public discourse is studied by an analysis of Swedish media reports onthe Astra Zeneca merger. More specifically we study the actors given voice in the discourse, the temporalevolution of the discourse and the arguments voiced. We conclude that the discourse is dominated by journalists,managers and financial analysts who all generate arguments based on a rather narrow “efficiency theoretical”basis. This is in conflict with current insights in research on mergers and acquisitions that has proposed morevalid and complex models for understanding mergers. The reasons and consequences of this discrepancybetween the public and the scientific discourses are discussed.

  5. Nuclear Reactors

    Energy Technology Data Exchange (ETDEWEB)

    Hogerton, John

    1964-01-01

    This pamphlet describes how reactors work; discusses reactor design; describes research, teaching, and materials testing reactors; production reactors; reactors for electric power generation; reactors for supply heat; reactors for propulsion; reactors for space; reactor safety; and reactors of tomorrow. The appendix discusses characteristics of U.S. civilian power reactor concepts and lists some of the U.S. reactor power projects, with location, type, capacity, owner, and startup date.

  6. Urethral duplication II-A Y type with rectal urethra: ASTRA approach and tunica vaginalis flap for first stage repair

    Directory of Open Access Journals (Sweden)

    Antonio Macedo Jr

    2012-10-01

    Full Text Available INTRODUCTION: Urethral duplication is a rare congenital anomaly affecting mainly boys. Generally, the duplication develops on the sagittal plane; the accessory urethra may run dorsally or ventrally to the orthotopic one. We present a patient with urethral duplication in which the orthotopic urethra was patent in the penile segment but atresic in the bulbar and prostatic segment. The patient had urinary flow from the rectum and the ectopic urethra could be well identified by anal examination. MATERIALS AND METHODS: Age at surgery was 13 months. The procedure consisted of an ASTRA (anterior sagittal trans-ano-rectal approach for dividing the urethra and rectum and was successful to move the urethra up to the perineal area. The rectum was reconstructed and the patient placed into a lithotomy position. A urethral catheter inserted in the penile urethra oriented us were the atresic urethra in bulbar area started. The scrotum was opened in the middle and the distance between the two urethral stumps proximal and distal defined the extension of no urethral tissue that consisted of 5 cm. We opened the right scrotal space and a tunica vaginalis flap was obtained and attached to the bulbar tissue for a two-stage urethroplasty strategy. RESULTS: Patient had a nice healing and the tunica vaginalis was nicely incorporated to the adjacent tissue, having the two urethral stumps well delineated. CONCLUSIONS: ASTRA approach in combination with a two-stage urethroplasty with tunica vaginalis dorsal flap proved to be an excellent combination for a rare case of urethral Y duplication having the main urethra into the rectum.

  7. On the optimization of a steady-state bootstrap-reactor

    International Nuclear Information System (INIS)

    A commercial fusion tokamak-reactor may be economically acceptable only for low recirculating power fraction r0 ≡ PCD/Pα BS≡IBS/I > 0.9 to sustain the steady-state operation mode for high plasma densities > 1.5 1020 m-3, fulfilled the divertor conditions. This paper presents the approximate expressions for the optimal set of reactor parameters for rBS/I∼1, based on the self-consistent plasma simulations by 1.5D ASTRA code. The linear MHD stability analysis for ideal n=1 kink and ballooning modes has been carried out to determine the conditions of stabilization for bootstrap steady state tokamak reactor BSSTR configurations. (author) 10 refs., 1 tab

  8. MEMBANGUN KEUNGGULAN KOMPETITIF CPO MELALUI SUPPLY CHAIN MANAGEMENT: STUDI KASUS DI PT. EKA DURA INDONESIA, ASTRA AGRO LESTARI, RIAU

    Directory of Open Access Journals (Sweden)

    Setiadi Djohar

    2011-08-01

    Full Text Available Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Todays, Supply Chain Management (SCM becomes one icon of strategic factors to achieve a competitive advantage. This is a SCM case study in agroindustry especially crude palm oil (CPO at PT. Eka Dura Indonesia (PT EDI, Astra Agro Lestari, Riau. The objectives of study is mapping of SCM problems of PT EDI, especially about value advantage and productivity advantage. Beside that, the objectives is building a SCM simulation model as strategic tool for developing strategy to achieve a competitive advantage. A system approach and modeling is used to analyze SCM problems. This study is successfully to build SCM Model that consist of SCM Strategic Model and SCM Tactic Model. SCM Model is used for simulating some scenarios about site management, supply schedulling, and tank management to CPO forecasting. From this model, the study also develops strategy chain for SCM to achieve a competitive advantage

  9. A 5-year prospective study of single-tooth replacements supported by the Astra Tech implant: a pilot study

    DEFF Research Database (Denmark)

    Gotfredsen, Klaus

    2004-01-01

    BACKGROUND: Implant-supported single-tooth replacements are an increasingly used method to replace teeth, especially in young patients. Therefore, long-term validation of different treatment modalities with different implant systems is of great importance. PURPOSE: The aim of the present study wa......: Implant-supported single-tooth replacement with the Astra Tech system is a reliable treatment resulting in a good 5-year prognosis and only few complications.......BACKGROUND: Implant-supported single-tooth replacements are an increasingly used method to replace teeth, especially in young patients. Therefore, long-term validation of different treatment modalities with different implant systems is of great importance. PURPOSE: The aim of the present study was...... bone adjacent to implants and neighboring teeth was less than 0.5 mm during the 5-year period, and there was no significant difference after crown placement between the treatment modality for group A and that for B. There were fewer clinical complications and repairs in group B than in group A. Soft...

  10. The complete spectrum of yeast chromosome instability genes identifies candidate CIN cancer genes and functional roles for ASTRA complex components.

    Directory of Open Access Journals (Sweden)

    Peter C Stirling

    2011-04-01

    Full Text Available Chromosome instability (CIN is observed in most solid tumors and is linked to somatic mutations in genome integrity maintenance genes. The spectrum of mutations that cause CIN is only partly known and it is not possible to predict a priori all pathways whose disruption might lead to CIN. To address this issue, we generated a catalogue of CIN genes and pathways by screening ∼ 2,000 reduction-of-function alleles for 90% of essential genes in Saccharomyces cerevisiae. Integrating this with published CIN phenotypes for other yeast genes generated a systematic CIN gene dataset comprised of 692 genes. Enriched gene ontology terms defined cellular CIN pathways that, together with sequence orthologs, created a list of human CIN candidate genes, which we cross-referenced to published somatic mutation databases revealing hundreds of mutated CIN candidate genes. Characterization of some poorly characterized CIN genes revealed short telomeres in mutants of the ASTRA/TTT components TTI1 and ASA1. High-throughput phenotypic profiling links ASA1 to TTT (Tel2-Tti1-Tti2 complex function and to TORC1 signaling via Tor1p stability, consistent with the role of TTT in PI3-kinase related kinase biogenesis. The comprehensive CIN gene list presented here in principle comprises all conserved eukaryotic genome integrity pathways. Deriving human CIN candidate genes from the list allows direct cross-referencing with tumor mutational data and thus candidate mutations potentially driving CIN in tumors. Overall, the CIN gene spectrum reveals new chromosome biology and will help us to understand CIN phenotypes in human disease.

  11. Modeling of realistic pebble bed reactor geometries using the Serpent Monte Carlo code

    International Nuclear Information System (INIS)

    Highlights: • The explicit stochastic geometry model in Serpent is documented. • A pebble bed criticality benchmark was calculated demonstrating the geometry model. • Stochastic pebble configurations were obtained from discrete element simulations. • Results deviate from experiments but are in line with example calculations. - Abstract: This paper documents the models available in Serpent for high temperature reactor (HTR) calculations. It is supplemented by a calculation example of ASTRA critical pebble bed experiments. In the pebble bed reactor modeling, different methods have been used to model the double heterogeneity problem occurring in pebble bed reactor calculations. A solution was sought to avoid unphysical simplifications in the pebble bed modeling and the stochastic geometry modeling features available in the Monte Carlo code Serpent were applied for exact placement of pebbles and fuel particles. Randomly packed pebble beds were produced in discrete element method (DEM) simulations and fuel particles were positioned randomly inside the pebbles. Pebbles and particles are located using a Cartesian search mesh, which provides necessary computational efficiency. Serpent uses Woodcock delta-tracking which provides efficient neutron tracking in the complicated geometries. This detailed pebble bed modeling approach was tested by calculating the ASTRA criticality benchmark experiment done at the Kurchatov Institute in 2004. The calculation results are in line with the sample calculations provided with the benchmark documentation. The material library selected for the calculations has a major effect on the results. The difference in graphite absorption cross section is considered the cause of this result. The model added in Serpent is very efficient with a calculation time slightly higher than with a regular lattice approximation. It is demonstrated that Serpent can be used for pebble bed reactor calculations with minimal geometric approximations as it

  12. N Reactor

    Data.gov (United States)

    Federal Laboratory Consortium — The last of Hanfordqaodmasdkwaspemas7ajkqlsmdqpakldnzsdflss nine plutonium production reactors to be built was the N Reactor.This reactor was called a dual purpose...

  13. Métodos de coloração de Roeser (1972: modificado - e Kropp (1972 visando a substituição do azul de astra por azul de alcião 8GS ou 8GX Staining methods of modified Roeser (1972 and Kropp (1972, aiming at substituing the astra blue by alcian blue 8GS or 8GX

    Directory of Open Access Journals (Sweden)

    Rebeca Luque

    1996-12-01

    Full Text Available Em folhas de Lychnophora ericoides, Coffea arabica e Nymphaea mexicana foram testados métodos de coloração baseados em Roeser (1972 modificado e Kropp (1972, visando a substituição do corante azul de astra por azul de alcião 8GS ou 8GX. As amostras foram fixadas em FAA, desidratadas em série butílica terciária e incluídas em parafina. Os cortes histológicos transversais foram corados segundo diferentes baterias de coloração, modificadas quanto ao tipo de corante usado, diferenciador e série de desidratação. As lâminas permanentes foram preparadas com bálsamo-do-canadá sintético. Os resultados obtidos evidenciaram que o método de Roeser (1972 modificado é melhor que o de Kropp (1972, nas condições deste experimento. O azul de astra pode ser substituído por azul de alcião 8GX e a desidratação pode ser em série isopropílica ou etílica, sem grande diferença entre elas. São discutidos os resultados provenientes das diferentes colorações.Staining methods based on modified Roeser (1972 as well as that of Kropp (1972 were done with leaves of Lychnophora ericoides, Coffea arabica and Nymphaea mexicana aiming at substituing the astra blue stain by alcian blue 8GS or 8GX. Samples were fixed in FAA, dehydrated in teit-butyl alcohol series and embedded in paraffin. The histological transversal sections were stained in different staining batteries, modified according to the type of stains and differentiators, and the series of dehydration. Permanent slides were prepared with synthetic Canada balsam. The results obtained indicate that the modified Roeser method (1972 is better than that of Kropp (1972 under present experimental conditions. The astra blue can be substituted by alcian blue 8GX and dehydration can be isopropylic or ethylic, with little difference between them. The results obtained with the different staining techniques used are discussed.

  14. An evaluation of the control rod modelling approach used in VSOP by comparing its results to the experiments performed in the ASTRA critical facility

    International Nuclear Information System (INIS)

    The modelling of strong absorber regions in diffusion theory is a well-known problem and many methods have been developed to accommodate the transport effects in diffusion theory. In this work the method of equivalent cross sections is evaluated for the ASTRA critical facility at the Russian Research Centre - Kurchatov Institute in Moscow. The measured reactivity worths of the control rods situated in the side reflector, are compared with the calculated values making use of equivalent diffusion parameters in VSOP. Favourable results were obtained for the control rods positioned within the first ring of reflector blocks with larger errors obtained for control rods positioned further from the core. Furthermore, the use of an equivalent boron concentration to represent the absorber regions was also investigated and shown to be useful if applied correctly and with care. However, the practical difficulties and restrictions imposed by the two approaches make the investigation of an alternative method, which should remove these shortcomings, attractive. (author)

  15. Reactor Physics

    International Nuclear Information System (INIS)

    The Reactor Physics and MYRRHA Department of SCK-CEN offers expertise in various areas of reactor physics, in particular in neutronics calculations, reactor dosimetry, reactor operation, reactor safety and control and non-destructive analysis of reactor fuel. This expertise is applied in the Department's own research projects in the VENUS critical facility, in the BR1 reactor and in the MYRRHA project (this project aims at designing a prototype Accelerator Driven System). Available expertise is also used in programmes external to the Department such as the reactor pressure steel vessel programme, the BR2 reactor dosimetry, and the preparation and interpretation of irradiation experiments by means of neutron and gamma calculations. The activities of the Fuzzy Logic and Intelligent Technologies in Nuclear Science programme cover several domains outside the department. Progress and achievements in these topical areas in 2000 are summarised

  16. Reactor Physics

    International Nuclear Information System (INIS)

    SCK-CEN's Reactor Physics and MYRRHA Department offers expertise in various areas of reactor physics, in particular in neutron and gamma calculations, reactor dosimetry, reactor operation and control, reactor code benchmarking and reactor safety calculations. This expertise is applied in the Department's own research projects in the VENUS critical facility, in the BR1 reactor and in the MYRRHA project (this project aims at designing a prototype Accelerator Driven System). Available expertise is also used in programmes external to the Department such as the reactor pressure steel vessel programme, the BR2 materials testing reactor dosimetry, and the preparation and interpretation of irradiation experiments by means of neutron and gamma calculations. The activities of the Fuzzy Logic and Intelligent Technologies in Nuclear Science programme cover several domains outside the department. Progress and achievements in these topical areas in 2001 are summarised

  17. Reactor Physics

    Energy Technology Data Exchange (ETDEWEB)

    Ait Abderrahim, A

    2001-04-01

    The Reactor Physics and MYRRHA Department of SCK-CEN offers expertise in various areas of reactor physics, in particular in neutronics calculations, reactor dosimetry, reactor operation, reactor safety and control and non-destructive analysis of reactor fuel. This expertise is applied in the Department's own research projects in the VENUS critical facility, in the BR1 reactor and in the MYRRHA project (this project aims at designing a prototype Accelerator Driven System). Available expertise is also used in programmes external to the Department such as the reactor pressure steel vessel programme, the BR2 reactor dosimetry, and the preparation and interpretation of irradiation experiments by means of neutron and gamma calculations. The activities of the Fuzzy Logic and Intelligent Technologies in Nuclear Science programme cover several domains outside the department. Progress and achievements in these topical areas in 2000 are summarised.

  18. Reactor operation

    CERN Document Server

    Shaw, J

    2013-01-01

    Reactor Operation covers the theoretical aspects and design information of nuclear reactors. This book is composed of nine chapters that also consider their control, calibration, and experimentation.The opening chapters present the general problems of reactor operation and the principles of reactor control and operation. The succeeding chapters deal with the instrumentation, start-up, pre-commissioning, and physical experiments of nuclear reactors. The remaining chapters are devoted to the control rod calibrations and temperature coefficient measurements in the reactor. These chapters also exp

  19. Reactor safeguards

    CERN Document Server

    Russell, Charles R

    2013-01-01

    Reactor Safeguards provides information for all who are interested in the subject of reactor safeguards. Much of the material is descriptive although some sections are written for the engineer or physicist directly concerned with hazards analysis or site selection problems. The book opens with an introductory chapter on radiation hazards, the construction of nuclear reactors, safety issues, and the operation of nuclear reactors. This is followed by separate chapters that discuss radioactive materials, reactor kinetics, control and safety systems, containment, safety features for water reactor

  20. Research Reactors

    Energy Technology Data Exchange (ETDEWEB)

    Martens, Frederick H. [Argonne National Laboratory; Jacobson, Norman H.

    1968-09-01

    This booklet discusses research reactors - reactors designed to provide a source of neutrons and/or gamma radiation for research, or to aid in the investigation of the effects of radiation on any type of material.

  1. Transient cycle fuel management optimization of a pressurized water reactor

    International Nuclear Information System (INIS)

    This paper concerns with how to optimally determine enrichments of fuel assembly (FA) batches of beginning-of-life (BOL) and reload cycle cores of a pressurized water reactor (PWR) plant which runs on a multi-batch, multi-cycle fuel management scheme. As a way to determine the optimum FA enrichments, a multi-cycle, multi-objective FA loading pattern (LP) optimization problem for the transient cycle cores involving the BOL and the reload cycle cores of the PWR plant is solved by the adaptively constrained discontinuous penalty function-based (ACDPF-based) multi-objective simulated annealing (MOSA) algorithm in combination with the commercial core neutronics design code ASTRA (Advanced Static and Transient Reactor Analyzer). The applicability and the effectiveness of the ACDPF-based MOSA algorithm is examined in terms of its solution to the first three transient cycle FA LP optimization problem of Yonggwang Nuclear Unit 4 (YGN4) a PWR plant in Korea. The practicality and usefulness of the ACDPF-based MOSA algorithm as an optimizer to determine optimum enrichments of BOL and reload cycle cores are discussed. (author)

  2. Research reactors

    International Nuclear Information System (INIS)

    This article proposes an overview of research reactors, i.e. nuclear reactors of less than 100 MW. Generally, these reactors are used as neutron generators for basic research in matter sciences and for technological research as a support to power reactors. The author proposes an overview of the general design of research reactors in terms of core size, of number of fissions, of neutron flow, of neutron space distribution. He outlines that this design is a compromise between a compact enough core, a sufficient experiment volume, and high enough power densities without affecting neutron performance or its experimental use. The author evokes the safety framework (same regulations as for power reactors, more constraining measures after Fukushima, international bodies). He presents the main characteristics and operation of the two families which represent almost all research reactors; firstly, heavy water reactors (photos, drawings and figures illustrate different examples); and secondly light water moderated and cooled reactors with a distinction between open core pool reactors like Melusine and Triton, pool reactors with containment, experimental fast breeder reactors (Rapsodie, the Russian BOR 60, the Chinese CEFR). The author describes the main uses of research reactors: basic research, applied and technological research, safety tests, production of radio-isotopes for medicine and industry, analysis of elements present under the form of traces at very low concentrations, non destructive testing, doping of silicon mono-crystalline ingots. The author then discusses the relationship between research reactors and non proliferation, and finally evokes perspectives (decrease of the number of research reactors in the world, the Jules Horowitz project)

  3. Reactor physics and reactor computations

    International Nuclear Information System (INIS)

    Mathematical methods and computer calculations for nuclear and thermonuclear reactor kinetics, reactor physics, neutron transport theory, core lattice parameters, waste treatment by transmutation, breeding, nuclear and thermonuclear fuels are the main interests of the conference

  4. Research reactors

    International Nuclear Information System (INIS)

    There are currently 284 research reactors in operation, and 12 under construction around the world. Of the operating reactors, nearly two-thirds are used exclusively for research, and the rest for a variety of purposes, including training, testing, and critical assembly. For more than 50 years, research reactor programs have contributed greatly to the scientific and educational communities. Today, six of the world's research reactors are being shut down, three of which are in the USA. With government budget constraints and the growing proliferation concerns surrounding the use of highly enriched uranium in some of these reactors, the future of nuclear research could be impacted

  5. Reactor container

    International Nuclear Information System (INIS)

    Object: To provide a jet and missile protective wall of a configuration being inflated toward the center of a reactor container on the inside of a body of the reactor container disposed within a biological shield wall to thereby increase safety of the reactor container. Structure: A jet and missile protective wall comprised of curved surfaces internally formed with a plurality of arch inflations filled with concrete between inner and outer iron plates and shape steel beam is provided between a reactor container surrounded by a biological shield wall and a thermal shield wall surrounding the reactor pressure vessel, and an adiabatic heat insulating material is filled in space therebetween. (Yoshino, Y.)

  6. Reactor building

    International Nuclear Information System (INIS)

    The whole reactor building is accommodated in a shaft and is sealed level with the earth's surface by a building ceiling, which provides protection against penetration due to external effects. The building ceiling is supported on walls of the reactor building, which line the shaft and transfer the vertical components of forces to the foundations. The thickness of the walls is designed to withstand horizontal pressure waves in the floor. The building ceiling has an opening above the reactor, which must be closed by cover plates. Operating equipment for the reactor can be situated above the building ceiling. (orig./HP)

  7. Heterogeneous reactors

    International Nuclear Information System (INIS)

    The microscopic study of a cell is meant for the determination of the infinite multiplication factor of the cell, which is given by the four factor formula: K(infinite) = n(epsilon)pf. The analysis of an homogeneous reactor is similar to that of an heterogeneous reactor, but each factor of the four factor formula can not be calculated by the formulas developed in the case of an homogeneous reactor. A great number of methods was developed for the calculation of heterogeneous reactors and some of them are discussed. (Author)

  8. Plasma reactor

    OpenAIRE

    Molina Mansilla, Ricardo; Erra Serrabasa, Pilar; Bertrán Serra, Enric

    2008-01-01

    [EN] A plasma reactor that can operate in a wide pressure range, from vacuum and low pressures to atmospheric pressure and higher pressures. The plasma reactor is also able to regulate other important settings and can be used for processing a wide range of different samples, such as relatively large samples or samples with rough surfaces.

  9. Reactor physics

    International Nuclear Information System (INIS)

    Progress in research on reactor physics in 1997 at the Belgian Nuclear Research Centre SCK/CEN is described. Activities in the following four domains are discussed: core physics, ex-core neutron transport, experiments in Materials Testing Reactors, international benchmarks

  10. Compact Reactor

    International Nuclear Information System (INIS)

    Weyl's Gauge Principle of 1929 has been used to establish Weyl's Quantum Principle (WQP) that requires that the Weyl scale factor should be unity. It has been shown that the WQP requires the following: quantum mechanics must be used to determine system states; the electrostatic potential must be non-singular and quantified; interactions between particles with different electric charges (i.e. electron and proton) do not obey Newton's Third Law at sub-nuclear separations, and nuclear particles may be much different than expected using the standard model. The above WQP requirements lead to a potential fusion reactor wherein deuterium nuclei are preferentially fused into helium nuclei. Because the deuterium nuclei are preferentially fused into helium nuclei at temperatures and energies lower than specified by the standard model there is no harmful radiation as a byproduct of this fusion process. Therefore, a reactor using this reaction does not need any shielding to contain such radiation. The energy released from each reaction and the absence of shielding makes the deuterium-plus-deuterium-to-helium (DDH) reactor very compact when compared to other reactors, both fission and fusion types. Moreover, the potential energy output per reactor weight and the absence of harmful radiation makes the DDH reactor an ideal candidate for space power. The logic is summarized by which the WQP requires the above conditions that make the prediction of DDH possible. The details of the DDH reaction will be presented along with the specifics of why the DDH reactor may be made to cause two deuterium nuclei to preferentially fuse to a helium nucleus. The presentation will also indicate the calculations needed to predict the reactor temperature as a function of fuel loading, reactor size, and desired output and will include the progress achieved to date

  11. Safe use of the Institute of Nuclear Physics reactor with low enriched fuel

    International Nuclear Information System (INIS)

    Full text: The requirements for safe exploitation of reactor do not accept boiling of water on the surface of fuel elements. At determination of safe thermal regime of reactor (permissible level of power) the regime of the most heat-stressed fuel assembly (FA) in the active core was analyzed. By using ASTRA code [1] the heat-stressed sector is determined by most heat-stressed FA. In calculations the power of reactor was selected so that stock factor prior to the water boiling on the FA surface was not less than 1.45. Besides, in calculations the value of maximal energy density in examined FA is decreased by 10 %. As the part of the energy generated in the FA cores will be lost in constructional materials of the active zone and on the reflector. The stocks of safety before occurrence of instability of flow in gaps between of FA and before crisis of heat exchange are also analyzed. Further, by using the MCNP-4C code [2], densities of fast (E > 0,821 MeV) and thermal flows (E < 0,625 eV) of neutrons were calculated for those experimental channels where the irradiation of samples would be carried out. (author)

  12. Operation experience operation experience with the TRIGA Reactor Wien

    International Nuclear Information System (INIS)

    The TRIGA Reactor Wien is the Closest Nuclear Facility to the IAEA. It is involved in: development of safeguards instrumentation, prevention of illicit trafficking, calibration of nuclear instrumentation, irradiation and test of safeguards instrumentation, storage of special nuclear material, training courses for junior inspectors (more than 120 trained and since 1992 more than 100 IAEA fellows from developing countries). The TRIGA Mark II Reactor Vienna is the only operating research reactor and the only nuclear facility in Austria, uniquely used for training and education of students and junior professionals in the fields of: nuclear technology, neutron and solid state physics, radiochemistry, radiation protection and dosimetry, low temperature physics, nuclear- and nuclear astrophysics, electron- and x-ray physics. The main technical data of the TRIGA Mark-II Reactor are reviewed as well as the operation experience during the 2004-2008 period: Visual inspection of beam tubes A (piercing) and D (radial), MCNP core calculations, investigation of shielding concrete for trace elements, estimation of radiation exposure during dismantling, replacement of both monitors at the console, problems with the NM-1000 wide range channel, Noise pick-up by nm-1000 due to grounding problems, Change of core configuration: 6 FLIP fuel elements transferred from C-ring into B-ring. The concrete studies at the TRIGA Vienna include: the determination of long-lived radionuclides in heavy concrete (mainly Ba-133, Eu 133, Eu-152, Eu-154, Co 154, Co-60), the measurement of the composition of heavy concrete, the estimation of the neutron attenuation in heavy concrete: aim is to establish a model and to predict the mass and activity of activated concrete in the Vienna TRIGA shield in view of future dismantling, the validation of model using the data from the dismantled 10 MW ASTRA reactor at Seibersdorf. In conclusions: after 50 years of successful TRIGA reactor operation (May 3, 1958) there

  13. NEUTRONIC REACTOR

    Science.gov (United States)

    Anderson, H.L.

    1960-09-20

    A nuclear reactor is described comprising fissionable material dispersed in graphite blocks, helium filling the voids of the blocks and the spaces therebetween, and means other than the helium in thermal conductive contact with the graphite for removing heat.

  14. NUCLEAR REACTOR

    Science.gov (United States)

    Miller, H.I.; Smith, R.C.

    1958-01-21

    This patent relates to nuclear reactors of the type which use a liquid fuel, such as a solution of uranyl sulfate in ordinary water which acts as the moderator. The reactor is comprised of a spherical vessel having a diameter of about 12 inches substantially surrounded by a reflector of beryllium oxide. Conventionnl control rods and safety rods are operated in slots in the reflector outside the vessel to control the operation of the reactor. An additional means for increasing the safety factor of the reactor by raising the ratio of delayed neutrons to prompt neutrons, is provided and consists of a soluble sulfate salt of beryllium dissolved in the liquid fuel in the proper proportion to obtain the result desired.

  15. Nuclear reactors

    International Nuclear Information System (INIS)

    This draft chart contains graphical symbols from which the type of (nuclear) reactor can be seen. They will serve as illustrations for graphical sketches. Important features of the individual reactor types are marked out graphically. The user can combine these symbols to characterize a specific reactor type. The basic graphical symbol is a square with a point in the centre. Functional groups can be depicted for closer specification. If two functional groups are not clearly separated, this is symbolized by a dotted line or a channel. Supply and discharge lines for coolant, moderator and fuel are specified in accordance with DIN 2481 and can be further specified by additional symbols if necessary. The examples in the paper show several different reactor types. (orig./AK)

  16. Multifunctional reactors

    OpenAIRE

    Westerterp, K.R.

    1992-01-01

    Multifunctional reactors are single pieces of equipment in which, besides the reaction, other functions are carried out simultaneously. The other functions can be a heat, mass or momentum transfer operation and even another reaction. Multifunctional reactors are not new, but they have received much emphasis in research in the last decade. A survey is given of modern developments and the first successful applications on a large scale. It is explained why their application in many instances is ...

  17. NUCLEAR REACTOR

    Science.gov (United States)

    Anderson, C.R.

    1962-07-24

    A fluidized bed nuclear reactor and a method of operating such a reactor are described. In the design means are provided for flowing a liquid moderator upwardly through the center of a bed of pellets of a nentron-fissionable material at such a rate as to obtain particulate fluidization while constraining the lower pontion of the bed into a conical shape. A smooth circulation of particles rising in the center and falling at the outside of the bed is thereby established. (AEC)

  18. Nuclear reactor

    International Nuclear Information System (INIS)

    In order to reduce neutron embrittlement of the pressue vessel of an LWR, blanked off elements are fitted at the edge of the reactor core, with the same dimensions as the fuel elements. They are parallel to each other, and to the edge of the reactor taking the place of fuel rods, and are plates of neutron-absorbing material (stainless steel, boron steel, borated Al). (HP)

  19. Breeder reactors

    International Nuclear Information System (INIS)

    The reasons for the development of fast reactors are briefly reviewed (a propitious neutron balance oriented towards a maximum uranium burnup) and its special requirements (cooling, fissile material density and reprocessing) discussed. The three stages in the French program of fast reactor development are outlined with Rapsodie at Cadarache, Phenix at Marcoule, and Super Phenix at Creys-Malville. The more specific features of the program of research and development are emphasized: kinetics and the core, the fuel and the components

  20. Research reactors - an overview

    Energy Technology Data Exchange (ETDEWEB)

    West, C.D.

    1997-03-01

    A broad overview of different types of research and type reactors is provided in this paper. Reactor designs and operating conditions are briefly described for four reactors. The reactor types described include swimming pool reactors, the High Flux Isotope Reactor, the Mark I TRIGA reactor, and the Advanced Neutron Source reactor. Emphasis in the descriptions is placed on safety-related features of the reactors. 7 refs., 7 figs., 2 tabs.

  1. Reactor utilization

    International Nuclear Information System (INIS)

    In 1962, the RA reactor was operated almost three times more than in 1961, producing total of 25 555 MWh. Diagram containing comparative data about reactor operation for 1960, 1961, and 1962, percent of fuel used and U-235 burnup shows increase in reactor operation. Number of samples irradiated was 659, number of experiments done was 16. mean powered level was 5.93 MW. Fuel was added into the core twice during the reporting year. In fact the core was increased from 56 to 68 fuel channels and later to 84 fuel channels. Fuel was added to the core when the reactivity worth decreased to the minimum operation level due to burnup. In addition to this 5 central fuel channels were exchanged with fresh fuel in february for the purpose of irradiation in the VISA-2 channel

  2. Reactor Neutrinos

    CERN Document Server

    Lasserre, T; Lasserre, Thierry; Sobel, Henry W.

    2005-01-01

    We review the status and the results of reactor neutrino experiments, that toe the cutting edge of neutrino research. Short baseline experiments have provided the measurement of the reactor neutrino spectrum, and are still searching for important phenomena such as the neutrino magnetic moment. They could open the door to the measurement of coherent neutrino scattering in a near future. Middle and long baseline oscillation experiments at Chooz and KamLAND have played a relevant role in neutrino oscillation physics in the last years. It is now widely accepted that a new middle baseline disappearance reactor neutrino experiment with multiple detectors could provide a clean measurement of the last undetermined neutrino mixing angle theta13. We conclude by opening on possible use of neutrinos for Society: NonProliferation of Nuclear materials and Geophysics.

  3. Nuclear reactors

    International Nuclear Information System (INIS)

    A nuclear reactor has a large prompt negative temperature coefficient of reactivity. A reactor core assembly of a plurality of fluid-tight fuel elements is located within a water-filled tank. Each fuel element contains a solid homogeneous mixture of 50-79 w/o zirconium hydride, 20-50 w/o uranium and 0.5-1.5 W erbium. The uranium is not more than 20 percent enriched, and the ratio of hydrogen atoms to zirconium atoms is between 1.5:1 and 7:1. The core has a long lifetime, E.G., at least about 1200 days

  4. Nuclear reactors

    International Nuclear Information System (INIS)

    In a liquid cooled nuclear reactor, the combination is described for a single-walled vessel containing liquid coolant in which the reactor core is submerged, and a containment structure, primarily of material for shielding against radioactivity, surrounding at least the liquid-containing part of the vessel with clearance therebetween and having that surface thereof which faces the vessel make compatible with the liquid, thereby providing a leak jacket for the vessel. The structure is preferably a metal-lined concrete vault, and cooling means are provided for protecting the concrete against reaching a temperature at which damage would occur. (U.S.)

  5. Nuclear reactor

    International Nuclear Information System (INIS)

    In an improved reactor core for a high conversion BWR reactor, Pu-breeding type BWR type reactor, Pu-breeding type BWR type rector, FEBR type reactor, etc., two types of fuel assemblies are loaded such that fuel assemblies using a channel box of a smaller irradiation deformation ratio are loaded in a high conversion region, while other fuel assemblies are loaded in a burner region. This enables to suppress the irradiation deformation within an allowable limit in the high conversion region where the fast neutron flux is high and the load weight from the inside of the channel box due to the pressure loss is large. At the same time, the irradiation deformation can be restricted within an allowable limit without deteriorating the neutron economy in the burner region in which fast neutron flux is low and the load weight from the inside of the channel box is small since a channel box with smaller neutron absorption cross section or reduced wall thickness is charged. As a result, it is possible to prevent structural deformations such as swelling of the channel box, bending of the entire assemblies, bending of fuel rods, etc. (K.M.)

  6. Reactor container

    International Nuclear Information System (INIS)

    A reactor container has a suppression chamber partitioned by concrete side walls, a reactor pedestal and a diaphragm floor. A plurality of partitioning walls are disposed in circumferential direction each at an interval inside the suppression chamber, so that independent chambers in a state being divided into plurality are formed inside the suppression chamber. The partition walls are formed from the bottom portion of the suppression chamber up to the diaphragm floor to isolate pool water in a divided state. Operation platforms are formed above the suppression chamber and connected to an access port. Upon conducting maintenance, inspection or repairing, a pump is disposed in the independent chamber to transfer pool water therein to one or a plurality of other independent chambers to make it vacant. (I.N.)

  7. Reactor building

    International Nuclear Information System (INIS)

    The present invention concerns a structure of ABWR-type reactor buildings, which can increase the capacity of a spent fuel storage area at a low cost and improved earthquake proofness. In the reactor building, the floor of a spent fuel pool is made flat, and a depth of the pool water satisfying requirement for shielding is ensured. In addition, a depth of pool water is also maintained for a equipment provisionally storing pool for storing spent fuels, and a capacity for a spent fuel storage area is increased by utilizing surplus space of the equipment provisionally storing pool. Since the flattened floor of the spent fuel pool is flushed with the floor of the equipment provisionally storing pool, transfer of horizontal loads applied to the building upon occurrence of earthquakes is made smooth, to improve earthquake proofness of the building. (T.M.)

  8. Nuclear reactors

    International Nuclear Information System (INIS)

    Disclosed is a nuclear reactor cooled by a freezable liquid has a vessel for containing said liquid and comprising a structure shaped as a container, and cooling means in the region of the surface of said structure for effecting freezing of said liquid coolant at and for a finite distance from said surface for providing a layer of frozen coolant on and supported by said surface for containing said liquid coolant. In a specific example, where the reactor is sodium-cooled, the said structure is a metal-lined concrete vault, cooling is effected by closed cooling loops containing NaK, the loops extending over the lined surface of the concrete vault with outward and reverse pipe runs of each loop separated by thermal insulation, and air is flowed through cooling pipes embedded in the concrete behind the metal lining. 7 claims, 3 figures

  9. NEUTRONIC REACTORS

    Science.gov (United States)

    Anderson, J.B.

    1960-01-01

    A reactor is described which comprises a tank, a plurality of coaxial steel sleeves in the tank, a mass of water in the tank, and wire grids in abutting relationship within a plurality of elongated parallel channels within the steel sleeves, the wire being provided with a plurality of bends in the same plane forming adjacent parallel sections between bends, and the sections of adjacent grids being normally disposed relative to each other.

  10. Nuclear reactor

    International Nuclear Information System (INIS)

    The liquid metal (sodium) cooled fast breeder reactor has got fuel subassemblies which are bundled and enclosed by a common can. In order to reduce bending of the sides of the can because of the load caused by the coolant pressure the can has got a dodecagon-shaped crosssection. The surfaces of the can may be of equal width. One out of two surfaces may also be convex towards the center. (RW)

  11. Nuclear reactor

    International Nuclear Information System (INIS)

    A detector having high sensitivity to fast neutrons and having low sensitivity to thermal neutrons is disposed for reducing influences of neutron detector signals on detection values of neutron fluxes when the upper end of control rod pass in the vicinity of the neutron flux detector. Namely, the change of the neutron fluxes is greater in the thermal neutron energy region while it is smaller in the fast neutron energy region. This is because the neutron absorbing cross section of B-10 used as neutron absorbers of control rods is greater in the thermal neutron region and it is smaller in the fast neutron region. As a result, increase of the neutron detection signals along with the local neutron flux change can be reduced, and detection signals corresponding to the reactor power can be obtained. Even when gang withdrawal of operating a plurality of control rods at the same time is performed, the reactor operation cycle can be measured accurately, thereby enabling to shorten the reactor startup time. (N.H.)

  12. Reactor core of nuclear reactor

    International Nuclear Information System (INIS)

    In a BWR type nuclear reactor, the number of first fuel assemblies (uranium) loaded in a reactor core is smaller than that of second fuel assemblies (mixed oxide), the average burnup degree upon take-out of the first fuel assemblies is reduced to less than that of the second fuel assemblies, and the number of the kinds of the fuel rods constituting the first fuel assemblies is made smaller than that of the fuel rods constituting the second fuel assemblies. As a result, the variety of the plutonium enrichment degree is reduced to make the distribution of the axial enrichment degree uniform, thereby enabling to simplify the distribution of the enrichment degree. Then the number of molding fabrication steps for MOX fuel assemblies can be reduced, thereby enabling to reduce the cost for molding and fabrication. (N.H.)

  13. Types of Nuclear Reactors

    International Nuclear Information System (INIS)

    The presentation is based on the following areas: Types of Nuclear Reactors, coolant, moderator, neutron spectrum, fuel type, pressurized water reactor (PWR), boiling water reactor (BWR) reactor pressurized heavy water (PHWR), gas-cooled reactor, RBMK , Nuclear Electricity Generation,Challenges in Nuclear Technology Deployment,EPR, APR1400, A P 1000, A PWR, ATMEA 1, VVER-1000, A PWR, VVER 1200, Boiling Water Reactor, A BWR, A BWR -II, ESBUR, Ke ren, AREVA, Heavy Water Reactor, Candu 6, Acr-1000, HWR, Bw, Iris, CAREM NuCcale, Smart, KLT-HOS, Westinghouse small modular Reactor, Gas Cooled Reactors, PBMR.

  14. Nuclear reactor

    International Nuclear Information System (INIS)

    A nuclear reactor is described in which the core components, including fuel-rod assemblies, control-rod assemblies, fertile rod-assemblies, and removable shielding assemblies, are supported by a plurality of separate inlet modular units. These units are referred to as inlet module units to distinguish them from the modules of the upper internals of the reactor. The modular units are supported, each removable independently of the others, in liners in the supporting structure for the lower internals of the reactor. The core assemblies are removably supported in integral receptacles or sockets of the modular units. The liners, units, sockets and assemblies have inlet openings for entry of the fluid. The modular units are each removably mounted in the liners with fluid seals interposed between the opening in the liner and inlet module into which the fluid enters in the upper and lower portion of the liner. Each assembly is similarly mounted in a corresponding receptacle with fluid seals interposed between the openings where the fluid enters in the lower portion of the receptacle or fitting closely in these regions. As fluid flows along each core assembly a pressure drop is produced along the fluid so that the fluid which emerges from each core assembly is at a lower pressure than the fluid which enters the core assembly. However because of the seals interposed in the mountings of the units and assemblies the pressures above and below the units and assemblies are balanced and the units are held in the liners and the assemblies are held in the receptacles by their weights as they have a higher specific gravity than the fluid. The low-pressure spaces between each module and its liner and between each core assembly and its module is vented to the low-pressure regions of the vessel to assure that fluid which leaks through the seals does not accumulate and destroy the hydraulic balance

  15. Nuclear research reactors

    International Nuclear Information System (INIS)

    It's presented data about nuclear research reactors in the world, retrieved from the Sien (Nuclear and Energetic Information System) data bank. The information are organized in table forms as follows: research reactors by countries; research reactors by type; research reactors by fuel and research reactors by purpose. (E.G.)

  16. Nuclear reactor physics course for reactor operators

    International Nuclear Information System (INIS)

    The education and training of nuclear reactor operators is important to guarantee the safe operation of present and future nuclear reactors. Therefore, a course on basic 'Nuclear reactor physics' in the initial and continuous training of reactor operators has proven to be indispensable. In most countries, such training also results from the direct request from the safety authorities to assure the high level of competence of the staff in nuclear reactors. The aim of the basic course on 'Nuclear Reactor Physics for reactor operators' is to provide the reactor operators with a basic understanding of the main concepts relevant to nuclear reactors. Seen the education level of the participants, mathematical derivations are simplified and reduced to a minimum, but not completely eliminated

  17. La desaparición de los grupos económicos nacionales de la cúpula empresarial argentina durante la década de 1990 Los casos de Gatic, Astra y Soldati

    Directory of Open Access Journals (Sweden)

    ALEJANDRO GAGGERO

    2013-10-01

    Full Text Available Durante la década de 1990 se produjo un inédito proceso de “extranjerización” en la cúpula empresarial argentina, que implicó la desaparición de muchos de los más importantes grupos económicos nacionales y el avance de las corporaciones transnacionales. Lejos de ser homogénea, la retirada fue consecuencia de diferentes estrategias llevadas adelante por los empresarios locales para enfrentar las reformas económicas e institucionales que se llevaron adelante en esos años. El artículo tiene por objetivo reconstruir las trayectorias de tres grandes grupos económicos que desaparecieron de la cúpula en ese período -Gatic, Astra y Soldati-, y que dan cuenta de dicha heterogeneidad. En cada caso se expone una breve reseña de los orígenes del grupo y la estrategia seguida para enfrentar las reformas estructurales, analizando especialmente las causas que llevaron a su venta o quiebra. Abstract During the 1990s there was an unprecedented denationalization of the business leaders in Argentina. This process involved the disappearance of many of the most important national economic groups and the advance of transnational corporations. Withdrawal resulted from different strategies carried out by local entrepreneurs to address economic and institutional reforms that were conducted in those years. The article aims to reconstruct the trajectories of three major economic groups disappeared in that period –Gatic, Astra y Soldati- which account for this heterogeneity. In each one of the cases a brief summary of the origins of the group and the followed strategy to cope with structural reforms is exposed, giving especial attention to the factors that caused the sales or the bankruptcies.

  18. Nuclear reactor

    International Nuclear Information System (INIS)

    Cover gas spaces for primary coolant vessel, such as a reactor container, a pump vessel and an intermediate heat exchanger vessel are in communication with each other by an inverted U-shaped pressure conduit. A transmitter and a receiver are disposed to the pressure conduit at appropriate positions. If vibration frequencies (pressure vibration) from low frequency to high frequency are generated continuously from the transmitter to the inside of the communication pipe, a resonance phenomenon (air-column resonance oscillation) is caused by the inherent frequency or the like of the communication pipe. The frequency of the air-column resonance oscillation is changed by the inner diameter and the clogged state of the pipelines. Accordingly, by detecting the change of the air-column oscillation characteristics by the receiver, the clogged state of the flow channels in the pipelines can be detected even during the reactor operation. With such procedures, steams of coolants flowing entrained by the cover gases can be prevented from condensation and coagulation at a low temperature portion of the pipelines, otherwise it would lead clogging in the pipelines. (I.N.)

  19. Hybrid adsorptive membrane reactor

    Science.gov (United States)

    Tsotsis, Theodore T. (Inventor); Sahimi, Muhammad (Inventor); Fayyaz-Najafi, Babak (Inventor); Harale, Aadesh (Inventor); Park, Byoung-Gi (Inventor); Liu, Paul K. T. (Inventor)

    2011-01-01

    A hybrid adsorbent-membrane reactor in which the chemical reaction, membrane separation, and product adsorption are coupled. Also disclosed are a dual-reactor apparatus and a process using the reactor or the apparatus.

  20. Hybrid adsorptive membrane reactor

    Science.gov (United States)

    Tsotsis, Theodore T.; Sahimi, Muhammad; Fayyaz-Najafi, Babak; Harale, Aadesh; Park, Byoung-Gi; Liu, Paul K. T.

    2011-03-01

    A hybrid adsorbent-membrane reactor in which the chemical reaction, membrane separation, and product adsorption are coupled. Also disclosed are a dual-reactor apparatus and a process using the reactor or the apparatus.

  1. Socio-economic factors and virological suppression among people diagnosed with HIV in the United Kingdom: results from the ASTRA study

    Directory of Open Access Journals (Sweden)

    Lisa Burch

    2014-11-01

    Full Text Available Introduction: In the United Kingdom, rates of virological suppression on antiretroviral therapy (ART are very high, but there remain a small but significant number of people on ART with detectable viraemia. The impact of socio-economic factors on virological suppression has been little studied. Materials and Methods: We used data from ASTRA, a cross-sectional, questionnaire study of >3000 individuals from 8 clinics in the United Kingdom in 2011–2012, linked to clinical records to address this question. Included participants had received ART for >6 months with a recorded current viral load (VL (latest at the time of questionnaire. Participants provided data on demographic factors: gender, sexual orientation, ethnicity and age; and socio-economic factors: UK birth/English reading ability, employment, housing, education and financial hardship. To assess non-adherence, participants were asked if in the past 3 months, they had missed ART for ≥2 days at a time. Virological suppression was defined as VL≤50 cps/mL. For each socio-economic factor, we calculated prevalence ratios using modified Poisson regression, first adjusting for demographic factors, then also for non-adherence. Results: A total of 2445 people fulfilled the inclusion criteria (80% male, 69% MSM, median age: 46 years, median CD4 count: 556 cells/mm3; 10% (234/2445 had VL>50 cps/mL. After adjusting for demographic factors, non-fluent English, not being employed, not home owning, education below university level and increasing financial hardship were each associated with higher prevalence of VL>50 cps/mL. Additional adjustment for non-adherence largely attenuated each association, but did not fully explain them (see Table 1. After adjustment for non-adherence and demographic factors, younger age was also associated with VL>50 cps/mL: for each additional 10 years an individual was 0.80 (95% CI 0.70–0.92 times as likely to have VL>50 cps/mL (p=0.0019. Adjusted prevalence ratios for

  2. Účetnictví a financování neziskových organizací v konkrétních podmínkách spolku TANEČNÍHO KLUBU ASTRA PRAHA

    OpenAIRE

    Havel, Jiří

    2015-01-01

    This batchelor thesis is focused on financial, accounting, legal and tax implications of the non-governmental, non-profit-making organizations in the Czech Republic in the particular conditions of the association TANEČNÍ KLUB ASTRA PRAHA. This thesis is divided into two parts - the theoretical and the practical one. The first part deals with the non-profit organizations, their development, diversification and legislation. The study in the first part also deals with the legal regulations, acco...

  3. Reactor container

    International Nuclear Information System (INIS)

    Purpose: To prevent shocks exerted on a vent head due to pool-swell caused within a pressure suppression chamber (disposed in a torus configuration around the dry well) upon loss of coolant accident in BWR type reactors. Constitution: The following relationship is established between the volume V (m3) of a dry well and the ruptured opening area A (m2) at the boundary expected upon loss of coolant accident: V >= 30340 (m) x A Then, the volume of the dry well is made larger than the ruptured open area, that is, the steam flow rate of leaking coolants upon loss of coolant accident to decrease the pressure rise in the dry well at the initial state where loss of coolant accident is resulted. Accordingly, the pressure of non-compressive gases jetted out from the lower end of the downcomer to the pool water is decreased to suppress the pool-swell. (Ikeda, J.)

  4. Locus: 6966 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.204765 M. musculus + S: gi|38079769|ref|NT_039303.2|Mm5_39343_32 NT_039303 Mus musculus otope ... 1 (Otop1), transcript variant b, mRNA detection of gravity ... | inner ear morphogenesis | membrane 5'end: 2 ...

  5. Locus: 8445 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.265917 M. musculus + S: gi|38092106|ref|NT_039521.2|Mm11_39561_32 NT_039521 Mus musculus thyroid ... NA-dependent | steroid hormone receptor activity | thyroid ... hormone receptor activity | transcription | transc ...

  6. Locus: 609 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.71304 H. sapiens + S: gi|29824573|ref|NC_000002.5|NC_000002 NC_000002 Homo sapiens thyroid ... pe ... eductase activity | response to oxidative stress | thyroid ... hormone generation Alt. poly(A) 2: 1 | 5'end: 2 | ...

  7. Locus: 8797 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.173847 M. musculus + S: gi|38073640|ref|NT_039552.2|Mm12_39592_32 NT_039552 Mus musculus thyroid ... of locomotion | rhodopsin-like receptor activity | thyroid -stimulating hormone receptor activity Alt. poly(A) ...

  8. Locus: 4401 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.724 H. sapiens + S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens thyroid ... horm ... NA-dependent | steroid hormone receptor activity | thyroid ... hormone receptor activity | transcription factor a ...

  9. Locus: 6467 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.295263 M. musculus + S: gi|38076561|ref|NT_039230.2|Mm3_39270_32 NT_039230 Mus musculus doubl ... ntracellular signaling cascade | kinase activity | neurogenesis ... | protein amino acid phosphorylation | protein kin ...

  10. Locus: 6622 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.39262 M. musculus - S: gi|38076983|ref|NT_039239.2|Mm3_39279_32 NT_039239 Mus musculus mRNA f ... (sensu Metazoa) | extracellular space | membrane | neurogenesis ... | plasma membrane | structural molecule activity A ...

  11. Locus: 11528 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.1131 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG31332 ... biogenesis | development | ectoderm development | neurogenesis ... | structural constituent of cytoskeleton Cassette: ...

  12. Locus: 10241 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.5857 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster RH08715 ... full insert cDNA neurogenesis ... | snRNA-nucleus export Retained Intron: 1 ...

  13. Locus: 3180 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.321576 H. sapiens - S: gi|29824582|ref|NC_000011.4|NC_000011 NC_000011 Homo sapiens tripartit ... 3 (TRIM3), transcript variant 1, mRNA cytoplasm | neurogenesis ... | nucleic acid binding | protein C-terminus bindin ...

  14. Locus: 834 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.258563 H. sapiens - S: gi|29824573|ref|NC_000002.5|NC_000002 NC_000002 Homo sapiens FEZ2 gene ... known | hemopoiesis | molecular_function unknown | neurogenesis ... | signal transduction Cassette: 1 ...

  15. Locus: 10400 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.1858 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG7449- ... dhesion | ectoderm development | myoblast fusion | neurogenesis ... | plasma membrane | regulation of myogenesis | sig ...

  16. Locus: 5331 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.27311 H. sapiens + S: gi|29824592|ref|NC_000021.3|NC_000021 NC_000021 Human transcription fac ... or SIM2 long form mRNA, complete cds development | neurogenesis ... | nucleus | regulation of transcription, DNA-depen ...

  17. Locus: 3200 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.439027 H. sapiens - S: gi|29824582|ref|NC_000011.4|NC_000011 NC_000011 Homo sapiens brain-der ... ds, alternatively spliced growth factor activity | neurogenesis ... Alt. Donor site: 1 | 5'end: 33 ...

  18. Locus: 486 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.26047 H. sapiens - S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens trinucleot ... ining 4 (TNRC4), mRNA RNA binding | mRNA binding | neurogenesis ... | nuclear mRNA splicing, via spliceosome | nucleus ...

  19. Locus: 11920 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.1673 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster rhomboi ... female gamete generation | integral to membrane | neurogenesis ... | plasma membrane | receptor binding | receptor si ...

  20. Locus: 5374 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.49002 H. sapiens - S: gi|29824592|ref|NC_000021.3|NC_000021 NC_000021 Homo sapiens Down syndr ... integral to plasma membrane | membrane fraction | neurogenesis ... | protein binding Alt. Acceptor site: 1 ...

  1. Locus: 12059 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.4631 D. melanogaster - S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster CG3208- ... actor activity | intracellular signaling cascade | neurogenesis ... | receptor binding Alt. Acceptor site: 1 ...

  2. Locus: 4276 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.446619 H. sapiens - S: gi|29824587|ref|NC_000016.4|NC_000016 NC_000016 Homo sapiens potassium ... ent phospholipid binding | exocytosis | membrane | neurogenesis ... | nucleus | potassium ion transport | protein bind ...

  3. Locus: 5740 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.195464 H. sapiens - S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens filamin A ... cell surface receptor linked signal transduction | neurogenesis ... | positive regulation of I-kappaB kinase/NF-kappaB ...

  4. Locus: 1895 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.22591 H. sapiens + S: gi|29824577|ref|NC_000006.5|NC_000006 NC_000006 Homo sapiens nuclear re ... y 2, group E, member 1 (NR2E1), mRNA development | neurogenesis ... | nucleus | regulation of transcription, DNA-depen ...

  5. Locus: 9950 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.40909 M. musculus - S: gi|38083611|ref|NT_078843.1|Mm18_78908_32 NT_078843 Mus musculus sema ... ds development | integral to membrane | membrane | neurogenesis ... | receptor activity Alt. poly(A) 2: 1 ...

  6. Locus: 4982 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.148932 H. sapiens - S: gi|29824590|ref|NC_000019.5|NC_000019 NC_000019 Homo sapiens sema doma ... NA development | integral to membrane | membrane | neurogenesis ... | receptor activity Retained Intron: 1 ...

  7. Locus: 5584 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.333303 H. sapiens + S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens gap junct ... tivity | connexon complex | integral to membrane | neurogenesis ... | transport 5'end: 1 ...

  8. Locus: 4859 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.127792 H. sapiens + S: gi|29824590|ref|NC_000019.5|NC_000019 NC_000019 Homo sapiens delta-lik ... elopment (sensu Mammalia) | integral to membrane | neurogenesis ... | nucleus | skeletal development Retained Intron: ...

  9. Locus: 12190 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.1717 D. melanogaster - S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster CG7178- ... inding | muscle contraction | muscle development | neurogenesis ... | structural constituent of cytoskeleton | tropomy ...

  10. Locus: 11618 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.16769 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG3119 ... sion | cell proliferation | ectoderm development | neurogenesis ... | plasma membrane Alt. Donor site: 1 | Alt. poly(A ...

  11. Locus: 1774 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.89434 H. sapiens - S: gi|29824576|ref|NC_000005.4|NC_000005 NC_000005 Homo sapiens drebrin 1 ... ctomyosin | cytoplasm | dendrite | intracellular | neurogenesis ... | profilin binding | regulation of dendrite morpho ...

  12. Locus: 9564 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.42015 M. musculus - S: gi|38080799|ref|NT_082362.1|Mm16_82359_32 NT_082362 Mus musculus mRNA ... cellular space | integral to membrane | membrane | neurogenesis ... | receptor activity Alt. Acceptor site: 1 ...

  13. Locus: 10946 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2695 D. melanogaster - S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG17212 ... pment | female gamete generation | gametogenesis | neurogenesis ... | receptor binding | receptor signaling protein ac ...

  14. Locus: 1677 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.248114 H. sapiens - S: gi|29824576|ref|NC_000005.4|NC_000005 NC_000005 Homo sapiens glial cel ... owth and/or maintenance | growth factor activity | neurogenesis ... | signal transduction Alt. Donor site: 1 | Alt. po ...

  15. Locus: 1858 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.118244 H. sapiens + S: gi|29824577|ref|NC_000006.5|NC_000006 NC_000006 Homo sapiens protein p ... hosphatase 2A B56-delta (PP2A) mRNA, complete cds. neurogenesis ... | nucleus | phosphoprotein phosphatase activity | ...

  16. Locus: 1186 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.45127 H. sapiens - S: gi|29824574|ref|NC_000003.5|NC_000003 NC_000003 Homo sapiens chondroiti ... ne | intracellular transport | membrane fraction | neurogenesis ... | protein binding 5'end: 1 | Alt. Donor site: 1 ...

  17. Locus: 2283 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.187319 H. sapiens - S: gi|29824578|ref|NC_000007.7|NC_000007 NC_000007 Homo sapiens sema doma ... phorin) 3D (SEMA3D), mRNA development | membrane | neurogenesis ... | receptor activity 5'end: 1 ...

  18. Locus: 1711 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.308628 H. sapiens - S: gi|29824576|ref|NC_000005.4|NC_000005 NC_000005 Homo sapiens sialyltra ... tus | N-glycan processing | integral to membrane | neurogenesis ... | oligosaccharide metabolism | protein amino acid ...

  19. Locus: 524 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.332012 H. sapiens - S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens mRNA for ... nsu Metazoa) | integral to membrane | myogenesis | neurogenesis ... | protein binding | receptor activity Alt. Accepto ...

  20. Locus: 10374 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.613 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG8118-P ... u Drosophila) | mesoderm cell fate determination | neurogenesis ... | nucleus | phosphoric monoester hydrolase activit ...

  1. Locus: 6973 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.89313 M. musculus + S: gi|38079535|ref|NT_039298.2|Mm5_39338_32 NT_039298 Mus musculus 13 day ... [Homo sapiens], full insert sequence development | neurogenesis ... Alt. poly(A) 2: 1 ...

  2. Locus: 11079 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7837 D. melanogaster - S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster RE70568 ... full insert cDNA ectoderm development | neurogenesis ... | nucleus | regulation of transcription from Pol I ...

  3. Locus: 11080 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.6987 D. melanogaster - S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster LD25129 ... gth cDNA axon guidance | blastoderm segmentation | neurogenesis ... | nucleus | regulation of transcription from Pol I ...

  4. Locus: 8921 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.4390 M. musculus - S: gi|38073558|ref|NT_039551.2|Mm12_39591_32 NT_039551 Mus musculus numb g ... evelopment | membrane | neuroblast proliferation | neurogenesis ... | nucleus | protein binding Cassette: 2 ...

  5. Locus: 5647 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.5422 H. sapiens - S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens cDNA FLJ383 ... ntegral to membrane | molecular_function unknown | neurogenesis ... Cassette: 1 | Alt. poly(A) 2: 1 | 5'end: 2 ...

  6. Locus: 11982 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2877 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster CG6500- ... development | hemopoiesis | mesoderm development | neurogenesis ... | nucleus | regulation of transcription from Pol I ...

  7. Locus: 498 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.89230 H. sapiens - S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens calcium-ac ... nel activity | ion transport | membrane fraction | neurogenesis ... | potassium ion transport | small conductance calc ...

  8. Locus: 482 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.54937 H. sapiens - S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens semaphorin ... ively spliced development | integral to membrane | neurogenesis ... | receptor activity Cassette: 2 ...

  9. Locus: 5228 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.439652 H. sapiens - S: gi|29824591|ref|NC_000020.5|NC_000020 NC_000020 Homo sapiens syndecan ... ular signaling cascade | intracellular transport | neurogenesis ... | plasma membrane | protein C-terminus binding | p ...

  10. Locus: 10098 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.12871 M. musculus - S: gi|38086874|ref|NT_039718.2|MmX_39758_32 NT_039718 Mus musculus double ... otubule associated complex | microtubule binding | neurogenesis ... | protein binding 5'end: 1 | Alt. poly(A) 1: 1 ...

  11. Locus: 7891 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.203949 M. musculus - S: gi|38089644|ref|NT_078586.1|Mm8_78651_32 NT_078586 Mus musculus downs ... e | cellular_component unknown | kinase activity | neurogenesis ... | transmembrane receptor protein tyrosine kinase s ...

  12. Locus: 6417 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.23662 M. musculus + S: gi|38077911|ref|NT_080250.1|Mm3_80247_32 NT_080250 Mus musculus semaph ... ent | extracellular space | integral to membrane | neurogenesis ... Cassette: 2 ...

  13. Locus: 7355 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.4873 M. musculus - S: gi|38083781|ref|NT_039340.2|Mm6_39380_32 NT_039340 Mus musculus distal- ... nic limb morphogenesis | inner ear morphogenesis | neurogenesis ... | nucleus | protein binding | regulation of transc ...

  14. Locus: 9821 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.41925 M. musculus - S: gi|38082236|ref|NT_039649.2|Mm17_39689_32 NT_039649 Mus musculus RIKEN ... ell differentiation | molecular_function unknown | neurogenesis ... | positive regulation of axonogenesis 5'end: 1 ...

  15. Locus: 2580 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.239147 H. sapiens + S: gi|29824580|ref|NC_000009.5|NC_000009 NC_000009 Homo sapiens guanine d ... se activity | hydrolase activity | intracellular | neurogenesis ... | nucleobase, nucleoside, nucleotide and nucleic a ...

  16. Locus: 3941 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.40098 H. sapiens + S: gi|29824586|ref|NC_000015.4|NC_000015 NC_000015 Homo sapiens gremlin 1 ... (GREM1), mRNA development | extracellular space | neurogenesis ... | protein binding Retained Intron: 1 ...

  17. Locus: 7848 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.271745 M. musculus + S: gi|38089529|ref|NT_078575.1|Mm8_78640_32 NT_078575 Mouse mRNA for neu ... cell adhesion | integral to membrane | membrane | neurogenesis ... | plasma membrane | protein binding | receptor act ...

  18. Locus: 10461 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.4704 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster RE34565 ... l insert cDNA DNA binding | ectoderm development | neurogenesis ... | nucleus | regulation of transcription from Pol I ...

  19. Locus: 9847 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.7978 M. musculus - S: gi|38082785|ref|NT_039657.2|Mm17_39697_32 NT_039657 Mus musculus ephrin ... cds development | extracellular space | membrane | neurogenesis ... Cassette: 1 ...

  20. Locus: 1906 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.26770 H. sapiens + S: gi|29824577|ref|NC_000006.5|NC_000006 NC_000006 Homo sapiens mRNA; cDNA ... ding | negative regulation of cell proliferation | neurogenesis ... | transport | transporter activity Alt. poly(A) 1: ...

  1. Locus: 10302 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2797 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG17835 ... development | neuroblast cell fate determination | neurogenesis ... | nucleus | regulation of transcription from Pol I ...

  2. Locus: 3806 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.25121 H. sapiens + S: gi|29824585|ref|NC_000014.4|NC_000014 NC_000014 Homo sapiens cDNA FLJ33 ... mic reticulum | integral to membrane | microsome | neurogenesis ... | steroid hydroxylase activity 5'end: 1 | Alt. Don ...

  3. Locus: 5313 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.285753 H. sapiens - S: gi|29824591|ref|NC_000020.5|NC_000020 NC_000020 Homo sapiens stathmin- ... 3 (STMN3), mRNA intracellular signaling cascade | neurogenesis ... 5'end: 1 ...

  4. Locus: 3027 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.77813 H. sapiens + S: gi|29824582|ref|NC_000011.4|NC_000011 NC_000011 Homo sapiens sphingomye ... se activity, acting on glycosyl bonds | lysosome | neurogenesis ... | signal transduction | sphingomyelin catabolism | ...

  5. Locus: 5729 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.6540 H. sapiens - S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens fibroblast ... g | extracellular space | growth factor activity | neurogenesis ... | signal transduction 5'end: 1 ...

  6. Locus: 5857 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.266341 M. musculus + S: gi|38049638|ref|NT_039170.2|Mm1_39210_32 NT_039170 Mus musculus neuro ... cellular space | integral to membrane | membrane | neurogenesis ... | plasma membrane | receptor activity | semaphorin ...

  7. Locus: 1387 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.37055 H. sapiens + S: gi|29824575|ref|NC_000004.5|NC_000004 NC_000004 Homo sapiens cDNA FLJ33 ... eptor signaling pathway | growth factor activity | neurogenesis ... | regulation of cell cycle 5'end: 2 | Cassette: 1 ...

  8. Locus: 10294 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.3380 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster LD04103 ... microtubule binding | microtubule-based process | neurogenesis ... | signal transduction 5'end: 1 ...

  9. Locus: 4649 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.12862 H. sapiens - S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens cDNA FLJ36 ... ellular region | integral to membrane | membrane | neurogenesis ... | transferase activity, transferring glycosyl grou ...

  10. Locus: 2368 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.248192 H. sapiens + S: gi|29824579|ref|NC_000008.5|NC_000008 NC_000008 Homo sapiens clone DNA ... g | extracellular space | growth factor activity | neurogenesis ... | signal transduction Alt. Acceptor site: 1 ...

  11. Locus: 10505 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7818 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG3647- ... RNA polymerase II transcription factor activity | neurogenesis ... | nucleus | regulation of transcription | regulati ...

  12. Locus: 6972 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.5071 M. musculus + S: gi|38079587|ref|NT_039299.2|Mm5_39339_32 NT_039299 Mus musculus sema do ... , complete cds development | extracellular space | neurogenesis ... | semaphorin receptor binding Cassette: 1 ...

  13. Locus: 11665 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2274 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster GH13232 ... esion | integral to membrane | membrane fraction | neurogenesis ... Alt. poly(A) 1: 1 ...

  14. Locus: 9128 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.32619 M. musculus + S: gi|38076531|ref|NT_039606.2|Mm14_39646_32 NT_039606 Mus musculus glial ... NA, complete cds. extracellular space | membrane | neurogenesis ... | receptor activity Cassette: 2 | Others: 1 ...

  15. Locus: 1629 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.132942 H. sapiens + S: gi|29824576|ref|NC_000005.4|NC_000005 NC_000005 Homo sapiens Rho GTPas ... and/or maintenance | cellular_component unknown | neurogenesis ... Alt. Donor site: 1 ...

  16. Locus: 1765 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.484063 H. sapiens - S: gi|29824576|ref|NC_000005.4|NC_000005 NC_000005 Homo sapiens mRNA for ... ell adhesion | development | extracellular space | neurogenesis ... | protein binding | structural molecule activity 5 ...

  17. Locus: 6221 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.198399 M. musculus - S: gi|38075763|ref|NT_078378.1|Mm2_78443_32 NT_078378 Mus musculus brain ... clone MNCb-1073. coreceptor activity | membrane | neurogenesis ... | receptor activity | transmembrane receptor prote ...

  18. Locus: 11842 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7841 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster mRNA fo ... al visceral muscle development | myoblast fusion | neurogenesis ... | plasma membrane | regulation of myogenesis | sig ...

  19. Locus: 5688 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.128824 H. sapiens - S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens mRNA for ... 1 Rho GTPase activator activity | axon guidance | neurogenesis ... | signal transduction | substrate-bound cell migra ...

  20. Locus: 205 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.408846 H. sapiens + S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens sema doma ... SEMA4A), mRNA development | integral to membrane | neurogenesis ... | receptor activity 5'end: 3 ...

  1. Locus: 887 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.445446 H. sapiens - S: gi|29824573|ref|NC_000002.5|NC_000002 NC_000002 Homo sapiens FP2823 mR ... complete cds development | integral to membrane | neurogenesis ... | receptor activity Retained Intron: 1 ...

  2. Locus: 323 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.388126 H. sapiens - S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens chromodom ... | chromatin modification | chromatin remodeling | neurogenesis ... | nucleus | protein ubiquitination | regulation of ...

  3. Locus: 9442 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.7996 M. musculus + S: gi|38080799|ref|NT_082362.1|Mm16_82359_32 NT_082362 Mus musculus fibrob ... ing | growth factor activity | heart development | neurogenesis ... | nucleus | signal transduction 5'end: 1 | Alt. po ...

  4. Locus: 756 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.368746 H. sapiens + S: gi|29824573|ref|NC_000002.5|NC_000002 NC_000002 Homo sapiens neuropili ... ivity | integral to membrane | membrane fraction | neurogenesis ... | receptor activity | vascular endothelial growth ...

  5. Locus: 5529 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.252387 H. sapiens - S: gi|29824593|ref|NC_000022.4|NC_000022 NC_000022 Homo sapiens protocadh ... homophilic cell adhesion | integral to membrane | neurogenesis ... | neuropeptide signaling pathway | structural mole ...

  6. Locus: 11505 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.5378 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG9610- ... nt | endoderm development | mesoderm development | neurogenesis ... | nucleus | regulation of transcription | regulati ...

  7. Locus: 1130 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.381928 H. sapiens + S: gi|29824574|ref|NC_000003.5|NC_000003 NC_000003 Homo sapiens mRNA for ... ntracellular signaling cascade | kinase activity | neurogenesis ... | protein binding | signal transducer activity Ret ...

  8. Locus: 663 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.25887 H. sapiens + S: gi|29824573|ref|NC_000002.5|NC_000002 NC_000002 Homo sapiens sema domai ... integral to plasma membrane | membrane fraction | neurogenesis ... | receptor activity Others: 1 ...

  9. Locus: 9244 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.4679 M. musculus + S: gi|38076915|ref|NT_039617.2|Mm15_39657_32 NT_039617 Mus musculus glia-d ... growth factor activity | metanephros development | neurogenesis ... | peripheral nervous system development | peristal ...

  10. Locus: 4453 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.440947 H. sapiens + S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens fetal Alz ... t | electron transporter activity | heme binding | neurogenesis ... | nucleus | regulation of transcription, DNA-depen ...

  11. Locus: 6558 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.132336 M. musculus - S: gi|38076209|ref|NT_039226.2|Mm3_39266_32 NT_039226 Mus musculus perox ... ane protein 3 (Pxmp3), mRNA integral to membrane | neurogenesis ... | neuronal migration | peroxisome | peroxisome org ...

  12. Locus: 3733 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.6132 H. sapiens + S: gi|29824585|ref|NC_000014.4|NC_000014 NC_000014 Homo sapiens mRNA; cDNA ... rtial cds calcium ion binding | lipid metabolism | neurogenesis ... | synaptic transmission | transporter activity | v ...

  13. Locus: 10179 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.13215 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG3166 ... l signaling | development | ectoderm development | neurogenesis ... | receptor activity | receptor binding | signal tr ...

  14. Locus: 12041 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.40 D. melanogaster - S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster SD07678 f ... hesion | defense response | ectoderm development | neurogenesis ... | transmembrane receptor activity 5'end: 1 ...

  15. Locus: 905 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.34871 H. sapiens - S: gi|29824573|ref|NC_000002.5|NC_000002 NC_000002 Homo sapiens zinc finge ... D binding | negative regulation of transcription | neurogenesis ... | nucleus | phosphatase regulator activity | regul ...

  16. Locus: 11435 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.5439 D. melanogaster + S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster RH35689 ... ma membrane, GPI-anchored | mesoderm development | neurogenesis ... | nucleotide phosphatase activity | skeletal devel ...

  17. Locus: 10802 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.3294 D. melanogaster - S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG9138- ... tion | cell-cell adhesion | ectoderm development | neurogenesis ... Alt. poly(A) 1: 1 ...

  18. Locus: 994 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.378877 H. sapiens + S: gi|29824574|ref|NC_000003.5|NC_000003 NC_000003 Homo sapiens nuclear r ... (cDNA clone MGC:48324 IMAGE:5272493), complete cds neurogenesis ... | nucleus | regulation of transcription, DNA-depen ...

  19. Locus: 3711 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.223851 H. sapiens - S: gi|29824584|ref|NC_000013.5|NC_000013 NC_000013 Homo sapiens hypotheti ... g | extracellular space | growth factor activity | neurogenesis ... | signal transduction 5'end: 1 ...

  20. Locus: 5097 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.448942 H. sapiens - S: gi|29824590|ref|NC_000019.5|NC_000019 NC_000019 Homo sapiens kallikrei ... vity | extracellular region | hydrolase activity | neurogenesis ... | peptidase activity | proteolysis and peptidolysi ...

  1. Locus: 2381 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.172816 H. sapiens + S: gi|29824579|ref|NC_000008.5|NC_000008 NC_000008 Homo sapiens neureguli ... | growth factor activity | integral to membrane | neurogenesis ... | receptor tyrosine kinase binding | transmembrane ...

  2. Locus: 3431 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.373575 H. sapiens + S: gi|29824583|ref|NC_000012.5|NC_000012 NC_000012 Homo sapiens apoptotic ... ase activator activity | cytosol | intracellular | neurogenesis ... | nucleotide binding | protein binding | regulatio ...

  3. Locus: 10630 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.6988 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster RE67261 ... ption factor activity | specification of segmental identity , abdomen | specification of segmental identity , th ...

  4. Locus: 11487 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.5646 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 D.melanogaster proboscipedia mR ... ption factor activity | specification of segmental identity , labial segment | specification of segmental ident ...

  5. Locus: 11610 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.21668 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG1038 ... scription factor activity | specification of organ identity ... | specification of segmental identity , abdomen | s ... pecification of segmental identity , thorax | transcription factor activity Cassette: ...

  6. Locus: 10605 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7063 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG3629- ... scription factor activity | specification of organ identity ... Retained Intron: 1 ...

  7. Locus: 10253 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7204 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG1772- ... kinase inhibitor activity | maintenance of oocyte identity ... (sensu Insecta) | negative regulation of cell cycl ...

  8. Locus: 11611 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.1763 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 D.melanogaster RNA for Abd-B ge ... ption factor activity | specification of segmental identity , abdomen 5'end: 7 ...

  9. Locus: 11489 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2481 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG1030- ... ption factor activity | specification of segmental identity , labial segment 5'end: 1 ...

  10. Locus: 2144 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.58103 H. sapiens + S: gi|29824578|ref|NC_000007.7|NC_000007 NC_000007 Homo sapiens splice var ... iant AKAP350 mRNA, partial cds ATP binding | L-fucose ... isomerase activity | centrosome | cytoplasm | cyto ... skeleton | fucose ... metabolism | protein binding | receptor binding | ...

  11. Locus: 11310 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.6725 D. melanogaster + S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster GH23483 ... lation of cell shape | regulation of tracheal tube architecture ... | regulation of tracheal tube diameter | regulatio ...

  12. Locus: 10414 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.4835 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster GM13959 ... a) | establishment and/or maintenance of chromatin architecture ... | nucleic acid binding | nucleus | protein binding ...

  13. Locus: 10301 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.564 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG7776-P ... in | establishment and/or maintenance of chromatin architecture ... | intercalary heterochromatin | polytene chromosom ...

  14. Locus: 3990 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.69594 H. sapiens + S: gi|29824586|ref|NC_000015.4|NC_000015 NC_000015 Homo sapiens high-mobil ... mRNA establishment and/or maintenance of chromatin architecture ... | nucleus | regulation of transcription, DNA-depen ...

  15. Locus: 3192 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.326876 H. sapiens - S: gi|29824582|ref|NC_000011.4|NC_000011 NC_000011 Homo sapiens SOX6 mRNA ... cds establishment and/or maintenance of chromatin architecture ... | heart development | muscle development | nucleus ...

  16. Locus: 4770 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.406534 H. sapiens + S: gi|29824590|ref|NC_000019.5|NC_000019 NC_000019 Homo sapiens pp8857 mR ... in | establishment and/or maintenance of chromatin architecture ... | nucleus | regulation of transcription, DNA-depen ...

  17. Locus: 10529 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7802 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG9696- ... ex | establishment and/or maintenance of chromatin architecture ... | gene silencing | general RNA polymerase II trans ...

  18. Locus: 10542 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7318 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG17950 ... ty | establishment and/or maintenance of chromatin architecture ... Cassette: 1 ...

  19. Locus: 10675 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.6724 D. melanogaster - S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG3664- ... me | establishment and/or maintenance of chromatin architecture ... | female meiosis chromosome segregation | intracel ...

  20. Locus: 2345 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.444082 H. sapiens - S: gi|29824578|ref|NC_000007.7|NC_000007 NC_000007 Homo sapiens enhancer ... ay | establishment and/or maintenance of chromatin architecture ... | heterotrimeric G-protein complex | nucleus | reg ...

  1. Locus: 1994 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.279939 H. sapiens - S: gi|29824577|ref|NC_000006.5|NC_000006 NC_000006 Homo sapiens mitochond ... integral to membrane | intracellular | ion channel clustering ... | mitochondrion | positive regulation of apoptosis ...

  2. Locus: 10859 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.1511 D. melanogaster - S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG6315- ... PA (fl(2)d) mRNA, complete cds female germ-line sex ... determination | nucleus | primary sex ... determinatio ... ternative nuclear mRNA splicing, via spliceosome | sex ... determination Others: 1 ...

  3. Locus: 10880 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.4216 D. melanogaster - S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG10128 ... , complete cds RNA binding | RNA splicing | female sex ... determination | female somatic sex ... determination | ... mRNA processing | male somatic sex ... determination | pre-mRNA splicing factor activity ...

  4. Locus: 11515 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.5095 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG9745- ... binding | double-stranded DNA binding | nucleus | satellite ... DNA binding 5'end: 1 ...

  5. Locus: 7655 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.29619 M. musculus - S: gi|38087525|ref|NT_039435.2|Mm7_39475_32 NT_039435 Mus musculus golgi ... associated, gamma adaptin ear ... containing, ARF binding protein 2 (Gga2), mRNA 5'e ...

  6. Locus: 11937 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7839 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 D.melanogaster mRNA for retinal ... ma membrane | lipid metabolism | lipid transport | perception ... of smell | phosphatidylcholine transporter activit ... iated signaling | subrhabdomeral cisterna | visual perception ... Alt. poly(A) 1: 2 | 5'end: 1 | Alt. poly(A) 2: 1 ...

  7. Locus: 5492 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.25220 H. sapiens - S: gi|29824593|ref|NC_000022.4|NC_000022 NC_000022 Homo sapiens mRNA for a ... olgi membrane | muscle maintenance | myelination | perception ... of sound | synaptic transmission | transferase act ...

  8. Locus: 1046 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.108447 H. sapiens + S: gi|29824574|ref|NC_000003.5|NC_000003 NC_000003 Homo sapiens spinocere ... ogenesis | nucleic acid binding | nucleus | visual perception ... | zinc ion binding Alt. poly(A) 1: 1 ...

  9. Locus: 1238 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.233363 H. sapiens - S: gi|29824574|ref|NC_000003.5|NC_000003 NC_000003 Homo sapiens guanylate ... activator activity | signal transduction | visual perception ... Alt. Donor site: 1 ...

  10. Locus: 3792 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.55158 H. sapiens + S: gi|29824585|ref|NC_000014.4|NC_000014 NC_000014 Homo sapiens tetratrico ... lone MGC:26813 IMAGE:4799330), complete cds visual perception ... Cassette: 2 | 5'end: 3 | Muturally Exclusive: 1 | ...

  11. Locus: 6296 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.21390 M. musculus - S: gi|38074726|ref|NT_039206.2|Mm2_39246_32 NT_039206 Mus musculus BarH-l ... Drosophila) (Barhl1), mRNA DNA binding | nucleus | perception ... of sound | regulation of transcription, DNA-depend ...

  12. Locus: 9117 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.300655 M. musculus + S: gi|38076531|ref|NT_039606.2|Mm14_39646_32 NT_039606 Mus musculus mRNA ... l1p gene) intracellular signaling cascade | visual perception ... Alt. poly(A) 1: 1 ...

  13. Locus: 7990 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.227110 M. musculus + S: gi|38089824|ref|NT_039473.2|Mm9_39513_32 NT_039473 Mus musculus C1q a ... embrane | transmembrane receptor activity | visual perception ... Alt. Donor site: 1 ...

  14. Locus: 5556 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.302019 H. sapiens + S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens mRNA for ... ntracellular | molecular_function unknown | visual perception ... Retained Intron: 1 ...

  15. Locus: 5541 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.76536 H. sapiens + S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens mRNA for t ... ransducin (beta) like 1 protein nucleus | perception ... of sound | regulation of transcription, DNA-depend ... t | signal transduction | ubiquitin cycle | visual perception ... 5'end: 1 | Cassette: 2 ...

  16. Locus: 11869 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.23617 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster CG5921 ... -PB (CG5921) mRNA, complete cds perception ... of sound | sensory perception ... Alt. Acceptor site: ...

  17. Locus: 10336 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.14462 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster SD2101 ... rimeric G-protein complex | mesoderm development | perception ... of taste Alt. Acceptor site: 1 ...

  18. Locus: 11188 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.21258 D. melanogaster + S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG3318 ... 8-PB (CG33188) mRNA, complete cds perception ... of sound | protein binding | receptor binding 5'en ...

  19. Locus: 1671 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.278962 H. sapiens - S: gi|29824576|ref|NC_000005.4|NC_000005 NC_000005 Homo sapiens membrane ... rane | melanin biosynthesis from tyrosine | visual perception ... Alt. poly(A) 1: 2 | Cassette: 1 ...

  20. Locus: 7651 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.347555 M. musculus - S: gi|38087189|ref|NT_039433.2|Mm7_39473_32 NT_039433 Mus musculus tubby ... protein coupled photoreceptor activity | cytosol | perception ... of sound | phototransduction Alt. poly(A) 1: 1 ...

  1. Locus: 10367 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.357 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG10595- ... nding | intracellular protein transport | myosin | perception ... of sound | structural constituent of cytoskeleton ... | vesicle-mediated transport | visual perception ... Retained Intron: 1 | Alt. Donor site: 1 | Others: ...

  2. Locus: 11418 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.7050 D. melanogaster + S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster pickpoc ... on | chromosome segregation | mitotic checkpoint | perception ... of salty taste | sodium channel activity Alt. poly ...

  3. Locus: 8520 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.89960 M. musculus + S: gi|38091687|ref|NT_039515.2|Mm11_39555_32 NT_039515 Mus musculus myosi ... ization and biogenesis | motor activity | myosin | perception ... of sound 5'end: 1 | Cassette: 2 ...

  4. Locus: 4744 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.278957 H. sapiens - S: gi|29824589|ref|NC_000018.4|NC_000018 NC_000018 Homo sapiens retina an ... dependent | transcription factor activity | visual perception ... Cassette: 1 ...

  5. Locus: 10999 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2128 D. melanogaster - S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG7595- ... rt | motor activity | myosin | non-muscle myosin | perception ... of sound | structural constituent of cytoskeleton ... ional myosin | vesicle-mediated transport | visual perception ... Alt. Acceptor site: 1 ...

  6. Locus: 554 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.550 H. sapiens - S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens phosducin (P ... e inhibitor activity | phototransduction | sensory perception ... | soluble fraction | visual perception ... 5'end: 1 ...

  7. Locus: 5069 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.24178 H. sapiens - S: gi|29824590|ref|NC_000019.5|NC_000019 NC_000019 Homo sapiens echinoderm ... RNA, complete cds microtubule associated complex | perception ... of sound | visual perception ... Cassette: 2 ...

  8. Locus: 1810 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.434715 H. sapiens + S: gi|29824577|ref|NC_000006.5|NC_000006 NC_000006 Homo sapiens mRNA for ... tegral to membrane | olfactory receptor activity | perception ... of smell 5'end: 1 ...

  9. Locus: 12143 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2910 D. melanogaster - S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster CG9176- ... ion channel activity | receptor activity | sensory perception ... | signal transduction Alt. poly(A) 2: 1 ...

  10. Locus: 10381 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.3330 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG8585- ... ty | plasma membrane | receptor activity | sensory perception ... | voltage-gated ion channel activity 5'end: 1 | Al ...

  11. Locus: 4348 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.435811 H. sapiens + S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens arrestin, ... NA cytoplasm | nucleus | plasma membrane | sensory perception ... | signal transduction Alt. Acceptor site: 1 | Cass ...

  12. Locus: 2969 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.418083 H. sapiens - S: gi|29824581|ref|NC_000010.4|NC_000010 NC_000010 Homo sapiens retinol b ... inding | transport | transporter activity | visual perception ... Cassette: 1 ...

  13. Locus: 6480 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.131708 M. musculus + S: gi|38077729|ref|NT_078406.1|Mm3_78471_32 NT_078406 Mus musculus RPE65 ... dopsin gene activity | retinal metabolism | visual perception ... Alt. poly(A) 1: 1 ...

  14. Locus: 4525 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.372031 H. sapiens - S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens periphera ... tion | negative regulation of cell proliferation | perception ... of sound | peripheral nervous system development | ...

  15. Locus: 3807 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.12451 H. sapiens + S: gi|29824585|ref|NC_000014.4|NC_000014 NC_000014 Homo sapiens echinoderm ... ML1), mRNA microtubule associated complex | visual perception ... Cassette: 1 | Alt. poly(A) 1: 1 ...

  16. Locus: 10334 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.3375 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster myosin ... ular protein transport | motor activity | myosin | perception ... of sound | structural constituent of cytoskeleton ... | vesicle-mediated transport | visual perception ... Alt. poly(A) 1: 1 | 5'end: 1 | Retained Intron: 1 ...

  17. Locus: 2238 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.304365 H. sapiens - S: gi|29824578|ref|NC_000007.7|NC_000007 NC_000007 Homo sapiens nonsyndro ... ring impairment protein (DFNA5) mRNA, complete cds perception ... of sound 5'end: 1 ...

  18. Locus: 4371 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.279746 H. sapiens + S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens transient ... transporter activity | receptor activity | sensory perception ... Cassette: 1 ...

  19. Locus: 7591 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.347555 M. musculus - S: gi|28482683|ref|NT_039444.1|Mm7_39484_32 NT_039444 Mus musculus tubby ... protein coupled photoreceptor activity | cytosol | perception ... of sound | phototransduction Alt. poly(A) 1: 1 | 5 ...

  20. Locus: 4512 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.279887 H. sapiens - S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens aryl-hydr ... eptor activity | unfolded protein binding | visual perception ... Cassette: 2 | Muturally Exclusive: 1 | Alt. Accept ...

  1. Locus: 4289 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.333738 H. sapiens - S: gi|29824587|ref|NC_000016.4|NC_000016 NC_000016 Homo sapiens cDNA FLJ4 ... grin complex | molecular_function unknown | visual perception ... Retained Intron: 1 ...

  2. Locus: 10945 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.3488 D. melanogaster - S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG6618- ... on | cell migration | cell proliferation | sensory perception ... Retained Intron: 1 ...

  3. Locus: 4408 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.143102 H. sapiens + S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens amine oxi ... porter activity | oxidoreductase activity | visual perception ... Alt. Donor site: 1 ...

  4. Locus: 6109 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.36501 M. musculus + S: gi|38075685|ref|NT_078347.1|Mm2_78412_32 NT_078347 Mus musculus microt ... le-associated protein 1 A (Mtap1a), mRNA cytosol | perception ... of sound | protein binding 5'end: 1 ...

  5. Locus: 11673 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.23027 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG4917 ... ase activity | glutamate-cysteine ligase complex | perception ... of sound | visual perception ... Retained Intron: 1 ...

  6. Locus: 8097 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.153982 M. musculus - S: gi|38090200|ref|NT_039482.2|Mm9_39522_32 NT_039482 Mus musculus adult ... le, full insert sequence inner ear morphogenesis | perception ... of sound Alt. Acceptor site: 1 ...

  7. Locus: 5660 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.378949 H. sapiens - S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens mRNA for ... olgi apparatus | intracellular protein transport | perception ... of sound | protein binding | visual perception ... Cas ...

  8. Locus: 5367 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.266416 H. sapiens - S: gi|29824592|ref|NC_000021.3|NC_000021 NC_000021 Homo sapiens claudin 1 ... transcript variant 1, mRNA integral to membrane | perception ... of sound | protein complex assembly | structural m ...

  9. Locus: 4532 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.410455 H. sapiens - S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens mRNA; cDN ... soluble fraction | synaptic transmission | visual perception ... Retained Intron: 1 | 5'end: 1 ...

  10. Locus: 2324 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.449625 H. sapiens - S: gi|29824578|ref|NC_000007.7|NC_000007 NC_000007 Homo sapiens glutamate ... egative regulation of adenylate cyclase activity | perception ... of smell | synaptic transmission | visual percepti ...

  11. Locus: 2311 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.528412 H. sapiens - S: gi|29824578|ref|NC_000007.7|NC_000007 NC_000007 Homo sapiens prestin ( ... integral to membrane | membrane | motor activity | perception ... of sound | sulfate porter activity | sulfate trans ...

  12. Locus: 619 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.293943 H. sapiens + S: gi|29824573|ref|NC_000002.5|NC_000002 NC_000002 Homo sapiens cDNA FLJ1 ... cascade | lyase activity | magnesium ion binding | perception ... of smell Others: 1 ...

  13. Locus: 1286 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.380222 H. sapiens - S: gi|29824574|ref|NC_000003.5|NC_000003 NC_000003 Homo sapiens Usher syn ... transcript variant 1, mRNA integral to membrane | perception ... of sound | visual perception ... 5'end: 2 | Retained I ...

  14. Locus: 85 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.241376 H. sapiens + S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens voltage-g ... omplete cds cation transport | membrane fraction | perception ... of sound | potassium ion transport | voltage-gated ...

  15. Locus: 11811 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.5720 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster CG3777- ... tegral to membrane | olfactory receptor activity | perception ... of smell Alt. Donor site: 1 | 5'end: 2 ...

  16. Locus: 1717 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.312102 H. sapiens - S: gi|29824576|ref|NC_000005.4|NC_000005 NC_000005 Homo sapiens cDNA clon ... ular_component unknown | oxidoreductase activity | perception ... of sound Cassette: 1 ...

  17. Locus: 1690 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.32967 H. sapiens - S: gi|29824576|ref|NC_000005.4|NC_000005 NC_000005 Homo sapiens Cockayne s ... erase II transcription factor activity | nucleus | perception ... of sound | protein binding | regulation of transcr ...

  18. Locus: 7333 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.248361 M. musculus - S: gi|38084330|ref|NT_039343.2|Mm6_39383_32 NT_039343 Mus musculus 3 day ... l dominant 5 homolog (human), full insert sequence perception ... of sound Alt. poly(A) 1: 1 ...

  19. Locus: 11889 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.3000 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster membran ... e import protein (mit ) mRNA, mit -ms(1)15 allele, complete cds; nuclear g ... ene for mit ochondrial product carrier activity | mit ochondrial ...

  20. Locus: 5368 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.371350 H. sapiens - S: gi|29824592|ref|NC_000021.3|NC_000021 NC_000021 Homo sapiens mRNA for ... HCS, complete cds. biotin -[acetyl-CoA-carboxylase] ligase activity | biotin - ... methylcrotonoyl-CoA-carboxylase] ligase activity | biotin -[methylmalonyl-CoA-carboxytransferase] ligase acti ...

  1. Locus: 4550 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.449863 H. sapiens - S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens acetyl-Co ... ds ATP binding | acetyl-CoA carboxylase activity | biotin ... binding | biotin ... carboxylase activity | biotin ... car ...

  2. Locus: 6359 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.315626 M. musculus - S: gi|38075372|ref|NT_039210.2|Mm2_39250_32 NT_039210 Mus musculus adult ... 10 product:MODULATOR OF ANTIGEN RECEPTOR SIGNALING MARS , full insert sequence SH3/SH2 adaptor protein acti ...

  3. Locus: 11286 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2357 D. melanogaster + S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster CG31196 ... nsu Insecta) | mitotic checkpoint | nonassociative learning ... | nucleus | oocyte microtubule cytoskeleton polari ...

  4. Locus: 6827 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.250981 M. musculus - S: gi|38079025|ref|NT_039267.2|Mm4_39307_32 NT_039267 Mus musculus Eph r ... | integral to plasma membrane | kinase activity | learning ... | membrane | organogenesis | positive regulation o ...

  5. Locus: 12009 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.4121 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster SD05277 ... full insert cDNA MAPKKK cascade | associative learning ... | cell cycle | operant conditioning | protein amin ...

  6. Locus: 2057 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.390567 H. sapiens - S: gi|29824577|ref|NC_000006.5|NC_000006 NC_000006 Homo sapiens cDNA FLJ4 ... eding behavior | intracellular signaling cascade | learning ... | non-membrane spanning protein tyrosine kinase ac ...

  7. Locus: 10550 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.1410 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG6741- ... behavior | eye morphogenesis (sensu Drosophila) | learning ... 5'end: 2 | Alt. Donor site: 1 ...

  8. Locus: 8879 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.25594 M. musculus - S: gi|38049477|ref|NT_039548.2|Mm12_39588_32 NT_039548 Mus musculus adult ... ity | cell proliferation | fatty acid metabolism | learning ... | organogenesis | protein amino acid phosphorylati ...

  9. Locus: 8904 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.259233 M. musculus - S: gi|38073640|ref|NT_039552.2|Mm12_39592_32 NT_039552 Mus musculus simi ... lar to Chain A, Interactions Causing The Kinetic ... Trap In Serpin Protein Folding (LOC380779), mRNA 5 ...

  10. Locus: 1884 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.82921 H. sapiens + S: gi|29824577|ref|NC_000006.5|NC_000006 NC_000006 Homo sapiens chromosome ... abolism | integral to plasma membrane | nucleotide-sugar ... transport | nucleotide-sugar ... transporter activity ... | protein modification | sugar ... porter activity Alt. poly(A) 1: 1 ...

  11. Locus: 5670 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.21899 H. sapiens - S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Human mRNA for UDP-gala ... ose metabolism | integral to membrane | nucleotide-sugar ... transport | nucleotide-sugar ... transporter activity ... | sugar ... porter activity 5'end: 1 | Alt. Acceptor site: 1 | ...

  12. Locus: 10013 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.214976 M. musculus + S: gi|38086104|ref|NT_039700.2|MmX_39740_32 NT_039700 Mus musculus solut ... rate transport | integral to membrane | nucleotide-sugar ... transport | nucleotide-sugar ... transporter activity ... | sugar ... porter activity | transport Alt. poly(A) 1: 1 ...

  13. Locus: 6090 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.4938 M. musculus + S: gi|38075734|ref|NT_078367.1|Mm2_78432_32 NT_078367 M.musculus limb defo ... elopment | nucleus | phosphoenolpyruvate-dependent sugar ... phosphotransferase system | protein binding | suga ...

  14. Locus: 4612 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.16206 H. sapiens - S: gi|29824588|ref|NC_000017.5|NC_000017 NC_000017 Homo sapiens uncharacte ... HT008 (HT008), mRNA phosphoenolpyruvate-dependent sugar ... phosphotransferase system | sugar ... porter activity ...

  15. Locus: 9840 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.326683 M. musculus - S: gi|38081718|ref|NT_039638.2|Mm17_39678_32 NT_039638 Mus musculus hypo ... ellular_component unknown | integral to membrane | manganese ... ion binding | manganese ... superoxide dismutase activ ...

  16. Locus: 2085 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.384944 H. sapiens - S: gi|29824577|ref|NC_000006.5|NC_000006 NC_000006 Homo sapiens mRNA; cDN ... s | cellular defense response (sensu Vertebrata) | manganese ... ion binding | manganese ... superoxide dismutase activ ...

  17. Locus: 3762 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.412416 H. sapiens + S: gi|29824585|ref|NC_000014.4|NC_000014 NC_000014 Homo sapiens hypoxia -i ... tion of transcription, DNA-dependent | response to hypoxia ... | signal transducer activity | signal transduction ...

  18. Locus: 4865 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.324277 H. sapiens + S: gi|29824590|ref|NC_000019.5|NC_000019 NC_000019 Homo sapiens egl nine ... paired donors, with incorporation or reduction of molecular ... oxyge | oxidoreductase activity, acting on single ... donors with incorporation of molecular ... oxygen, incorporati | oxygen sensor activity | pos ...

  19. Locus: 8505 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.3705 M. musculus + S: gi|38091687|ref|NT_039515.2|Mm11_39555_32 NT_039515 Mus musculus procol ... paired donors, with incorporation or reduction of molecular ... oxyge | oxidoreductase activity, acting on single ... donors with incorporation of molecular ... oxygen, incorporati | peptidyl-proline hydroxylati ...

  20. Locus: 6871 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.90003 M. musculus - S: gi|38078868|ref|NT_039265.2|Mm4_39305_32 NT_039265 M.musculus mRNA for ... connexin31 cell communication ... | cell-cell signaling | connexon channel activity ...

  1. Locus: 8715 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.40016 M. musculus - S: gi|38091687|ref|NT_039515.2|Mm11_39555_32 NT_039515 Mus musculus adult ... hannel protein alpha 12, full insert sequence cell communication ... | cell-cell signaling | connexon channel activity ...

  2. Locus: 9167 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.57207 M. musculus - S: gi|38076531|ref|NT_039606.2|Mm14_39646_32 NT_039606 Mus musculus gap j ... membrane channel protein alpha 3 (Gja3), mRNA cell communication ... | cell-cell signaling | connexon channel activity ...

  3. Locus: 10163 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.4134 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG14471 ... omplete cds JNK cascade | adherens junction | cell communication ... | dorsal closure | eye morphogenesis (sensu Drosop ...

  4. Locus: 267 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.153648 H. sapiens + S: gi|29824572|ref|NC_000001.4|NC_000001 NC_000001 Homo sapiens cDNA FLJ4 ... nteracting protein (liprin), alpha 2 (PPFIA2) cell communication ... | intracellular | molecular_function unknown Alt. ...

  5. Locus: 11844 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.17740 D. melanogaster + S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster CG1302 ... (CG13021) mRNA, complete cds cell adhesion | cell communication ... | cell-cell adhesion | signal transduction 5'end: ...

  6. Locus: 10491 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.12176 D. melanogaster + S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG1814 ... 6-PB (CG18146) mRNA, complete cds cell communication ... | cell-matrix adhesion | receptor binding | signal ...

  7. Locus: 8649 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.354719 M. musculus - S: gi|38092106|ref|NT_039521.2|Mm11_39561_32 NT_039521 M.musculus mRNA f ... or connexin45 cell communication ... | cell-cell signaling | connexon channel activity ...

  8. Locus: 10868 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.18201 D. melanogaster - S: gi|24762251|ref|NT_033779 NT_033779 Drosophila melanogaster CG3170 ... (CG31708) mRNA, complete cds cell adhesion | cell communication ... | cell-cell adhesion | signal transduction Alt. Do ...

  9. Locus: 6088 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.143719 M. musculus + S: gi|38075685|ref|NT_078347.1|Mm2_78412_32 NT_078347 Mus musculus delta ... IMAGE:4017786), complete cds Notch binding | cell communication ... | cell differentiation | development | extracellul ...

  10. Locus: 8882 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.186146 M. musculus - S: gi|38073839|ref|NT_039553.2|Mm12_39593_32 NT_039553 Mus musculus jagg ... E:3598850), partial cds calcium ion binding | cell communication ... | development | extracellular space | integral to ...

  11. Locus: 9168 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.25652 M. musculus - S: gi|38076531|ref|NT_039606.2|Mm14_39646_32 NT_039606 Mus musculus gap j ... clone MGC:70077 IMAGE:30245263), complete cds cell communication ... | cell-cell signaling | connexon channel activity ...

  12. Locus: 10425 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.3292 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster SP2353 ... mRNA, complete cds cell adhesion | cell communication ... | cell-cell adhesion | cell-matrix adhesion | rece ...

  13. Locus: 4896 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.433670 H. sapiens + S: gi|29824590|ref|NC_000019.5|NC_000019 NC_000019 Homo sapiens cDNA clon ... 87107 IMAGE:5313340, complete cds binding | ferric iron ... binding | ferritin complex | iron ... ion homeostasis ... | iron ... ion transport Retained Intron: 2 ...

  14. Locus: 7541 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Mm.84435 M. musculus + S: gi|38086012|ref|NT_039395.2|Mm7_39435_32 NT_039395 Mus musculus radial ... omplete cds cilium | extracellular region | ferric iron ... binding | iron ... ion homeostasis | iron ... ion transpor ...

  15. Locus: 5659 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.371135 H. sapiens - S: gi|29826146|ref|NC_000023.4|NC_000023 NC_000023 Homo sapiens dystrophi ... ), transcript variant Dp140, mRNA binding | ferric iron ... binding | iron ... ion homeostasis | iron ... ion transpor ...

  16. Locus: 933 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.409875 H. sapiens - S: gi|29824573|ref|NC_000002.5|NC_000002 NC_000002 Homo sapiens solute ca ... rrier family 40 (iron -regulated transporter), member 1 (SLC40A1), mRNA i ... ntegral to membrane | iron ... ion transport | iron ... ion transporter activity | tr ...

  17. Locus: 1332 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.252855 H. sapiens - S: gi|29824574|ref|NC_000003.5|NC_000003 NC_000003 Homo sapiens antigen p ... ript variant 1, mRNA extracellular region | ferric iron ... binding | integral to plasma membrane | iron ... ion h ... omeostasis | iron ... ion transport | membrane | transport Alt. poly(A) ...

  18. Locus: 1179 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Hs.437457 H. sapiens - S: gi|29824574|ref|NC_000003.5|NC_000003 NC_000003 Homo sapiens lactotran ... esponse to bacteria | extracellular space | ferric iron ... binding | humoral immune response | iron ... ion homeo ... stasis | iron ... ion transport | serine-type endopeptidase activity ...

  19. Locus: 12116 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.2924 D. melanogaster - S: gi|24643829|ref|NC_004354 NC_004354 Drosophila melanogaster RH21402 ... ex assembly | protein folding | response to heat | sleep ... Alt. Donor site: 1 | 5'end: 5 ...

  20. Locus: 10592 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.11356 D. melanogaster + S: gi|20340552|ref|NT_033778 NT_033778 Drosophila melanogaster CG3318 ... atabolism | pigmentation | regulation of circadian sleep /wake cycle, sleep ... | serotonin catabolism | sleep ... 5 ...

  1. Locus: 11765 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Dm.1901 D. melanogaster - S: gi|20349357|ref|NT_033777 NT_033777 Drosophila melanogaster double- ... on of protein-nucleus import | rhythmic behavior | sleep ... 5'end: 2 | Cassette: 1 ...

  2. Locus: 12636 [ASTRA[Archive

    Lifescience Database Archive (English)

    Full Text Available Cel.17854 C. elegans - S: lcl|CHROMOSOME_IV Caenorhabditis elegans essential DEnse Body componen ... t, vinculin, Paralysed Arrest at Two-fold PAT -8, muscle DEnse Body defective DEB-1 (pat -8), mRNA ...

  3. Survey of research reactors

    International Nuclear Information System (INIS)

    A survey of reasearch reactors based on the IAEA Nuclear Research Reactor Data Base (RRDB) was done. This database includes information on 273 operating research reactors ranging in power from zero to several hundred MW. From these 273 operating research reactors 205 reactors have a power level below 5 MW, the remaining 68 reactors range from 5 MW up to several 100 MW thermal power. The major reactor types with common design are: Siemens Unterrichtsreaktors, 1.2 Argonaut reactors, Slowpoke reactors, the miniature neutron source reactors, TRIGA reactors, material testing reactors and high flux reactors. Technical data such as: power, fuel material, fuel type, enrichment, maximum neutron flux density and experimental facilities for each reactor type as well as a description of their utilization in physics and chemistry, medicine and biology, academic research and teaching, training purposes (students and physicists, operating personnel), industrial application (neutron radiography, silicon neutron transmutation doping facilities) are provided. The geographically distribution of these reactors is also shown. As conclusions the author discussed the advantages (low capital cost, low operating cost, low burn up, simple to operate, safe, less restrictive containment and sitting requirements, versatility) and disadvantages (lower sensitivity for NAA, limited radioisotope production, limited use of neutron beams, limited access to the core, licensing) of low power research reactors. 24 figs., refs. 15, Tab. 1 (nevyjel)

  4. Department of reactor technology

    International Nuclear Information System (INIS)

    The activities of the Department of Reactor Technology at Risoe during 1979 are described. The work is presented in five chapters: Reactor Engineering, Reactor Physics and Dynamics, Heat Transfer and Hydraulics, The DR 1 Reactor, and Non-Nuclear Activities. A list of the staff and of publications is included. (author)

  5. RB reactor noise analysis

    International Nuclear Information System (INIS)

    Statistical fluctuations of reactivity represent reactor noise. Analysis of reactor noise enables determining a series of reactor kinetic parameters. Fluctuations of power was measured by ionization chamber placed next to the tank of the RB reactor. The signal was digitized by an analog-digital converter. After calculation of the mean power, 3000 data obtained by sampling were analysed

  6. Research Nuclear Reactors

    International Nuclear Information System (INIS)

    Published in English and in French, this large report first proposes an overview of the use and history of research nuclear reactors. It discusses their definition, and presents the various types of research reactors which can be either related to nuclear power (critical mock-ups, material test reactors, safety test reactors, training reactors, prototypes), or to research (basic research, industry, health), or to specific particle physics phenomena (neutron diffraction, isotope production, neutron activation, neutron radiography, semiconductor doping). It reports the history of the French research reactors by distinguishing the first atomic pile (ZOE), and the activities and achievements during the fifties, the sixties and the seventies. It also addresses the development of instrumentation for research reactors (neutron, thermal, mechanical and fission gas release measurements). The other parts of the report concern the validation of neutronics calculations for different reactors (the EOLE water critical mock-up, the MASURCA air critical mock-up dedicated to fast neutron reactor study, the MINERVE water critical mock-up, the CALIBAN pulsed research reactor), the testing of materials under irradiation (OSIRIS reactor, laboratories associated with research reactors, the Jules Horowitz reactor and its experimental programs and related devices, irradiation of materials with ion beams), the investigation of accident situations (on the CABRI, Phebus, Silene and Jules Horowitz reactors). The last part proposes a worldwide overview of research reactors

  7. Reactor Physics Training

    International Nuclear Information System (INIS)

    University courses in nuclear reactor physics at the universities consist of a theoretical description of the physics and technology of nuclear reactors. In order to demonstrate the basic concepts in reactor physics, training exercises in nuclear reactor installations are also desirable. Since the number of reactor facilities is however strongly decreasing in Europe, it becomes difficult to offer to students a means for demonstrating the basic concepts in reactor physics by performing training exercises in nuclear installations. Universities do not generally possess the capabilities for performing training exercises. Therefore, SCK-CEN offers universities the possibility to perform (on a commercial basis) training exercises at its infrastructure consisting of two research reactors (BR1 and VENUS). Besides the organisation of training exercises in the framework of university courses, SCK-CEN also organizes theoretical courses in reactor physics for the education and training of nuclear reactor operators. It is indeed a very important subject to guarantee the safe operation of present and future nuclear reactors. In this framework, an understanding of the fundamental principles of nuclear reactor physics is also necessary for reactor operators. Therefore, the organisation of a basic Nuclear reactor physics course at the level of reactor operators in the initial and continuous training of reactor operators has proven to be indispensable. In most countries, such training also results from the direct request from the safety authorities to assure the high level of competence of the staff in nuclear reactors. The objectives this activity are: (1) to provide training and education activities in reactor physics for university students and (2) to organise courses in nuclear reactor physics for reactor operators

  8. Introduction of Nuclear Reactor Engineering

    International Nuclear Information System (INIS)

    This book introduces development, status, supply and demand and resource of nuclear reactor. It deals with basic knowledge of nuclear reactor, which are reactor system, heat recovery in reactor core, structural feature in reactor, materials of structure in reactor, shielding of gamma ray, shielding of reactor, safety and environmental problem of nuclear power plant, nuclear fuel and economical efficiency of nuclear energy.

  9. Safeguarding research reactors

    International Nuclear Information System (INIS)

    The report is organized in four sections, including the introduction. The second section contains a discussion of the characteristics and attributes of research reactors important to safeguards. In this section, research reactors are described according to their power level, if greater than 25 thermal megawatts, or according to each fuel type. This descriptive discussion includes both reactor and reactor fuel information of a generic nature, according to the following categories. 1. Research reactors with more than 25 megawatts thermal power, 2. Plate fuelled reactors, 3. Assembly fuelled reactors. 4. Research reactors fuelled with individual rods. 5. Disk fuelled reactors, and 6. Research reactors fuelled with aqueous homogeneous fuel. The third section consists of a brief discussion of general IAEA safeguards as they apply to research reactors. This section is based on IAEA safeguards implementation documents and technical reports that are used to establish Agency-State agreements and facility attachments. The fourth and last section describes inspection activities at research reactors necessary to meet Agency objectives. The scope of the activities extends to both pre and post inspection as well as the on-site inspection and includes the examination of records and reports relative to reactor operation and to receipts, shipments and certain internal transfers, periodic verification of fresh fuel, spent fuel and core fuel, activities related to containment and surveillance, and other selected activities, depending on the reactor

  10. Research nuclear reactors

    International Nuclear Information System (INIS)

    Since the divergence of the first nuclear reactor in 1942, about 600 research or test reactors have been built throughout the world. Today 255 research reactors are operating in 57 countries and about 70% are over 25 years old. Whereas there are very few reactor types for power plants because of rationalization and standardisation, there is a great diversity of research reactors. We can divide them into 2 groups: heavy water cooled reactors and light water moderated reactors. Heavy water cooled reactors are dedicated to the production of high flux of thermal neutrons which are extracted from the core by means of neutronic channels. Light water moderated reactors involved pool reactors and slightly pressurized closed reactors, they are polyvalent but their main purposes are material testing, technological irradiations, radionuclide production and neutron radiography. At the moment 8 research reactors are being built in Canada, Germany, Iran, Japan, Kazakhstan, Morocco, Russia and Slovakia and 8 others are planned in 7 countries (France, Indonesia, Nigeria, Russia, Slovakia, Thailand and Tunisia. Different research reactors are described: Phebus, Masurca, Phenix and Petten HFR. The general principles of nuclear safety applied to test reactors are presented. (A.C.)

  11. Nuclear reactor building

    International Nuclear Information System (INIS)

    Purpose: To prevent seismic vibrations of external buildings from transmitting to the side walls of a reactor container in a tank type FBR reactor building. Constitution: The reactor building is structured such that the base mat for a reactor container chamber and a reactor container is separated from the base mat for the walls of building, and gas-tight material such as silicon rubber is filled in the gap therebetween. With such a constitution, even if the crane-supporting wall vibrates violently upon occurrence of earthqualkes, the seismic vibrations do not transmit toward the reactor container chamber. (Horiuchi, T.)

  12. Reactor Physics Programme

    International Nuclear Information System (INIS)

    The Reactor Physics and Department of SCK-CEN offers expertise in various areas of reactor physics, in particular in neutronics calculations, reactor dosimetry, reactor operation, reactor safety and control and non-destructive analysis on reactor fuel. This expertise is applied within the Reactor Physics and MYRRHA Research Department's own research projects in the VENUS critical facility, in the BR1 reactor and in the MYRRHA project (this project aims at designing a prototype Accelerator Driven System). Available expertise is also used in programmes external to the Department such as the reactor pressure steel vessel programme, the BR2 reactor dosimetry, and the preparation and interpretation of irradiation experiments. Progress and achievements in 1999 in the following areas are reported on: (1) investigations on the use of military plutonium in commercial power reactors; (2) neutron and gamma calculations performed for BR-2 and for other reactors; (3) the updating of neutron and gamma cross-section libraries; (4) the implementation of reactor codes; (6) the management of the UNIX workstations; and (6) fuel cycle studies

  13. Ship propulsion reactors technology

    International Nuclear Information System (INIS)

    This paper takes the state of the art on ship propulsion reactors technology. The french research programs with the corresponding technological stakes, the reactors specifications and advantages are detailed. (A.L.B.)

  14. Undergraduate reactor control experiment

    International Nuclear Information System (INIS)

    A sequence of reactor and related experiments has been a central element of a senior-level laboratory course at Pennsylvania State University (Penn State) for more than 20 yr. A new experiment has been developed where the students program and operate a computer controller that manipulates the speed of a secondary control rod to regulate TRIGA reactor power. Elementary feedback control theory is introduced to explain the experiment, which emphasizes the nonlinear aspect of reactor control where power level changes are equivalent to a change in control loop gain. Digital control of nuclear reactors has become more visible at Penn State with the replacement of the original analog-based TRIGA reactor control console with a modern computer-based digital control console. Several TRIGA reactor dynamics experiments, which comprise half of the three-credit laboratory course, lead to the control experiment finale: (a) digital simulation, (b) control rod calibration, (c) reactor pulsing, (d) reactivity oscillator, and (e) reactor noise

  15. Process heat reactors

    International Nuclear Information System (INIS)

    The consumption of heat, for industrial and domestic needs, takes up half of the national energy supply; direct utilization of the heat produced by nuclear reactors could therefore contribute to reduce the deficit in the energetic results. The restraints proper to heat consumption (dispersal and variety of consumers, irregular demand) involve the development of the heat transport system structures and adequate nuclear reactors. With this in view, the Commissariat a l'Energie Atomique and Technicatome are developing the CAS reactor series, pressurized water reactors (PWR), (CAS 3G reactor with a power of 420 MW.th.), and the Thermos reactor (100 MW.th.), directly conceived to produce heat at 1200C and whose technology derives from the experimental pool reactors type. In order to prove the value of the Thermos design, an experimental reactor should soon be constructed in the Saclay nuclear research centre

  16. Reactor System Design

    International Nuclear Information System (INIS)

    SMART NPP(Nuclear Power Plant) has been developed for duel purpose, electricity generation and energy supply for seawater desalination. The objective of this project IS to design the reactor system of SMART pilot plant(SMART-P) which will be built and operated for the integrated technology verification of SMART. SMART-P is an integral reactor in which primary components of reactor coolant system are enclosed in single pressure vessel without connecting pipes. The major components installed within a vessel includes a core, twelve steam generator cassettes, a low-temperature self pressurizer, twelve control rod drives, and two main coolant pumps. SMART-P reactor system design was categorized to the reactor coe design, fluid system design, reactor mechanical design, major component design and MMIS design. Reactor safety -analysis and performance analysis were performed for developed SMART=P reactor system. Also, the preparation of safety analysis report, and the technical support for licensing acquisition are performed

  17. Nuclear Reactor RA Safety Report, Vol. 11, Reactor operation

    International Nuclear Information System (INIS)

    This volume includes the following chapters describing: Organisation of reactor operation (including operational safety, fuel management, and regulatory rules for RA reactor operation); Control and maintenance of reactor components (reactor core, nuclear fuel, heavy water and cover gas systems, mechanical structures, electric power supply system, reactor instrumentation); Quality assurance and Training of the reactor personnel

  18. The Chernobylsk reactor accident

    International Nuclear Information System (INIS)

    The construction, the safety philosophy, the major reactor physical parameters of RBMK-1000 type reactor units and the detailed description of the Chernobylsk-4 reactor accident, its causes and conclusions, the efforts to reduce the consequences on the reactor site and in the surroundings are discussed based on different types of Soviet documents including the report presented to the IAEA by the Soviet Atomic Energy Agency in August 1986. (V.N.)

  19. Zero energy reactor 'RB'

    International Nuclear Information System (INIS)

    In 1958 the zero energy reactor RB was built with the purpose of enabling critical experiments with various reactor systems to be carried out. The first core assembly built in this reactor consists of heavy water as moderator and natural uranium metal as fuel. In order to be able to obtain very accurate results when measuring the main characteristics of the assembly the reactor was built as a completely bare system. (author)

  20. High solids fermentation reactor

    Science.gov (United States)

    Wyman, Charles E.; Grohmann, Karel; Himmel, Michael E.; Richard, Christopher J.

    1993-01-01

    A fermentation reactor and method for fermentation of materials having greater than about 10% solids. The reactor includes a rotatable shaft along the central axis, the shaft including rods extending outwardly to mix the materials. The reactor and method are useful for anaerobic digestion of municipal solid wastes to produce methane, for production of commodity chemicals from organic materials, and for microbial fermentation processes.

  1. Fossil nuclear reactors

    Energy Technology Data Exchange (ETDEWEB)

    Maurette, M.

    1976-01-01

    The discussion of fossil nuclear reactors (the Oklo phenomenon) covers the earth science background, neutron-induced isotopes and reactor operating conditions, radiation-damage studies, and reactor modeling. In conclusion possible future studies are suggested and the significance of the data obtained in past studies is summarized. (JSR)

  2. Fusion reactor studies

    International Nuclear Information System (INIS)

    A review is given of fusion reactor systems studies, the objectives of these studies are outlined and some recent conceptual reactor designs are described. The need for further studies in greater depth is indicated so that progress towards a commercial fusion reactor may be consolidated. (U.K.)

  3. Reactor power measuring device

    International Nuclear Information System (INIS)

    The present invention provides a self-powered long detector having a sensitivity over the entire length of a reactor core as an entire control rod withdrawal range of a BWR type reactor, and a reactor power measuring device using a gamma ray thermometer which scarcely causes sensitivity degradation. That is, a hollow protection pipe is disposed passing through the reactor core from the outside of a reactor pressure vessel. The self-powered long detectors and the gamma ray thermometers are inserted and installed in the protection pipe. An average reactor power in an axial direction of the reactor relative to a certain position in the horizontal cross section of the reactor core is determined based on the power of the self-powered long detector over the entire length of the reactor core. Since the response of the self-powered detector relative to a local power change is rapid, the output is used as an input signal to a safety protection device of the reactor core. Further, a gamma ray thermometer secured in the reactor and having scarce sensitivity degradation is used instead of an incore travelling neutron monitor used for relative calibration of an existent neutron monitor secured in the reactor. (I.S.)

  4. Light water reactor safety

    CERN Document Server

    Pershagen, B

    2013-01-01

    This book describes the principles and practices of reactor safety as applied to the design, regulation and operation of light water reactors, combining a historical approach with an up-to-date account of the safety, technology and operating experience of both pressurized water reactors and boiling water reactors. The introductory chapters set out the basic facts upon which the safety of light water reactors depend. The central section is devoted to the methods and results of safety analysis. The accidents at Three Mile Island and Chernobyl are reviewed and their implications for light wate

  5. Nuclear reactor repairing device

    International Nuclear Information System (INIS)

    Purpose: To enable free repairing of an arbitrary position in an LMFBR reactor. Constitution: A laser light emitted from a laser oscillator installed out of a nuclear reactor is guided into a portion to be repaired in the reactor by using a reflecting mirror, thereby welding or cutting it. The guidance of the laser out of the reactor into the reactor is performed by an extension tube depending into a through hole of a rotary plug, and the guidance of the laser light into a portion to be repaired is performed by the transmitting and condensing action of the reflecting mirror. (Kamimura, M.)

  6. Fundamentals of reactor chemistry

    International Nuclear Information System (INIS)

    In the Nuclear Engineering School of JAERI, many courses are presented for the people working in and around the nuclear reactors. The curricula of the courses contain also the subject material of chemistry. With reference to the foreign curricula, a plan of educational subject material of chemistry in the Nuclear Engineering School of JAERI was considered, and the fundamental part of reactor chemistry was reviewed in this report. Since the students of the Nuclear Engineering School are not chemists, the knowledge necessary in and around the nuclear reactors was emphasized in order to familiarize the students with the reactor chemistry. The teaching experience of the fundamentals of reactor chemistry is also given. (author)

  7. Nuclear reactor physics

    CERN Document Server

    Stacey, Weston M

    2010-01-01

    Nuclear reactor physics is the core discipline of nuclear engineering. Nuclear reactors now account for a significant portion of the electrical power generated worldwide, and new power reactors with improved fuel cycles are being developed. At the same time, the past few decades have seen an ever-increasing number of industrial, medical, military, and research applications for nuclear reactors. The second edition of this successful comprehensive textbook and reference on basic and advanced nuclear reactor physics has been completely updated, revised and enlarged to include the latest developme

  8. Generation III+ Reactor Portfolio

    International Nuclear Information System (INIS)

    While the power generation needs of utilities are unique and diverse, they are all faced with the double challenge of meeting growing electricity needs while curbing CO2 emissions. To answer these diverse needs and help tackle this challenge, AREVA has developed several reactor models which are briefly described in this document: The EPRTM Reactor: designed on the basis of the Konvoi (Germany) and N4 (France) reactors, the EPRTM reactor is an evolutionary model designed to achieve best-in-class safety and operational performance levels. The ATMEA1TM reactor: jointly designed by Mitsubishi Heavy Industries and AREVA through ATMEA, their common company. This reactor design benefits from the competencies and expertise of the two mother companies, which have commissioned close to 130 reactor units. The KERENATM reactor: Designed on the basis of the most recent German BWR reactors (Gundremmingen) the KERENATM reactor relies on proven technology while also including innovative, yet thoroughly tested, features. The optimal combination of active and passive safety systems for a boiling water reactor achieves a very low probability of severe accident

  9. The Maple reactor project

    International Nuclear Information System (INIS)

    MDS Nordion supplies the majority of the world's reactor-produced medical isotopes. These isotopes are currently produced in the NRU reactor at AECL's Chalk River Laboratories (CRL). Medical isotopes and related technology are relied upon around the world to prevent, diagnose and treat disease. The NRU reactor, which has played a key role in supplying medical isotopes to date, has been in operation for over 40 years. Replacing this aging reactor has been a priority for MDS Nordion to assure the global nuclear medicine community that Canada will continue to be a dependable supplier of medical isotopes. MDS Nordion contracted AECL to construct two MAPLE reactors dedicated to the production of medical isotopes. The MDS Nordion Medical Isotope Reactor (MMIR) project started in September 1996. This paper describes the MAPLE reactors that AECL has built at its CRL site, and will operate for MDS Nordion. (author)

  10. High temperature reactors

    International Nuclear Information System (INIS)

    With the advent of high temperature reactors, nuclear energy, in addition to producing electricity, has shown enormous potential for the production of alternate transport energy carrier such as hydrogen. High efficiency hydrogen production processes need process heat at temperatures around 1173-1223 K. Bhabha Atomic Research Centre (BARC), is currently developing concepts of high temperature reactors capable of supplying process heat around 1273 K. These reactors would provide energy to facilitate combined production of hydrogen, electricity, and drinking water. Compact high temperature reactor is being developed as a technology demonstrator for associated technologies. Design has been also initiated for a 600 MWth innovative high temperature reactor. High temperature reactor development programme has opened new avenues for research in areas like advanced nuclear fuels, high temperature and corrosion resistant materials and protective coatings, heavy liquid metal coolant technologies, etc. The paper highlights design of these reactors and their material related requirements

  11. Spinning fluids reactor

    Science.gov (United States)

    Miller, Jan D; Hupka, Jan; Aranowski, Robert

    2012-11-20

    A spinning fluids reactor, includes a reactor body (24) having a circular cross-section and a fluid contactor screen (26) within the reactor body (24). The fluid contactor screen (26) having a plurality of apertures and a circular cross-section concentric with the reactor body (24) for a length thus forming an inner volume (28) bound by the fluid contactor screen (26) and an outer volume (30) bound by the reactor body (24) and the fluid contactor screen (26). A primary inlet (20) can be operatively connected to the reactor body (24) and can be configured to produce flow-through first spinning flow of a first fluid within the inner volume (28). A secondary inlet (22) can similarly be operatively connected to the reactor body (24) and can be configured to produce a second flow of a second fluid within the outer volume (30) which is optionally spinning.

  12. Reactor Safety: Introduction

    International Nuclear Information System (INIS)

    The programme of the Reactor Safety Division focuses on the development of expertise on materials behaviour under irradiation for fission and fusion oriented applications. Furthermore, as nuclear energy needs international public acceptance with respect to safety and efficient management of natural resources and wants to reduce the burden of nuclear waste, the Reactor Safety Division enhanced its efforts to develop the MYRRHA project. MYRRHA, an accelerator driven sub-critical system, might have the potential to cope in Europe with the above mentioned constraints on acceptability and might serve as a technological platform for GEN IV reactor development, in particular the Liquid Metal Fast Reactor.The Reactor Safety Division gathers three research entities that are internationally recognised: the Reactor Materials Research department, the Reactor Physics and MYRRHA department and the Instrumentation department.The objectives of Reactor Materials Research are: to evaluate the integrity and behaviour of structural materials and nuclear fuels used in present and future nuclear power industry; to perform research to unravel and understand the parameters that determine the material and fuel behaviour under or after irradiation; to contribute to the interpretation and modelling of the materials and fuels behaviour in order to develop and assess strategies for optimum life management of nuclear power plant components. The programmes within the Reactor Materials Research department concentrate on four distinct disciplines: Reactor Pressure Vessel Steel embrittlement Stress corrosion cracking in reactor coolant environment, including Irradiation Assisted Stress Corrosion Cracking; Nuclear Fuel characterisation and development of new fuel types for commercial and test reactors. Development of materials for Fusion and advanced nuclear fission reactors. The safe operation of present nuclear power plants relies primarily on the integrity of the reactor pressure vessel

  13. 高温堆临界实验装置ASTRA的初始临界计算%Initial criticality calculation for the high temperature reactor in the ASTRA critical facility

    Institute of Scientific and Technical Information of China (English)

    常鸿; 杨永伟; 经荥清

    2006-01-01

    为了验证球床式高温气冷堆初始临界的计算方法,用法国Monte Carlo程序TRIPOLI-4.3对燃料球内的包覆燃料颗粒以及堆芯内不同的球分布进行了模拟.考虑了燃料球的双重非均匀性、不同区域内球的布置以及其在堆芯的体积填充率等.计算了俄罗斯的球床式高温气冷堆临界试验装置ASTRA的初始临界.与实验结果比较,计算得到的临界实验高度误差为0.6%, 堆芯有效增值因子keff误差为 0.1%. TRIPOLI-4.3程序是球床式高温气冷堆初始临界计算的有效工具.

  14. Research reactors in Argentina

    International Nuclear Information System (INIS)

    Argentine Nuclear Development started in early fifties. In 1957, it was decided to built the first a research reactor. RA-1 reactor (120 kw, today licensed to work at 40 kW) started operation in January 1958. Originally RA-1 was an Argonaut (American design) reactor. In early sixties, the RA-1 core was changed. Fuel rods (20% enrichment) was introduced instead the old Argonaut core design. For that reason, a critical facility named RA-0 was built. After that, the RA-3 project started, to build a multipurpose 5 MW nuclear reactor MTR pool type, to produce radioisotopes and research. For that reason and to define the characteristics of the RA-3 core, another critical facility was built, RA-2. Initially RA-3 was a 90 % enriched fuel reactor, and started operation in 1967. When Atucha I NPP project started, a German design Power Reactor, a small homogeneous reactor was donated by the German Government to Argentina (1969). This was RA-4 reactor (20% enrichment, 1W). In 1982, RA-6 pool reactor achieved criticality. This is a 500 kW reactor with 90% enriched MTR fuel elements. In 1990, RA-3 started to operate fueled by 20% enriched fuel. In 1997, the RA-8 (multipurpose critical facility located at Pilcaniyeu) started to operate. RA-3 reactor is the most important CNEA reactor for Argentine Research Reactors development. It is the first in a succession of Argentine MTR reactors built by CNEA (and INVAP SE ) in Argentina and other countries: RA-6 (500 kW, Bariloche-Argentina), RP-10 (10MW, Peru), NUR (500 kW, Algeria), MPR (22 MW, Egypt). The experience of Argentinian industry permits to compete with foreign developed countries as supplier of research reactors. Today, CNEA has six research reactors whose activities have a range from education and promotion of nuclear activity, to radioisotope production. For more than forty years, Argentine Research Reactors are working. The experience of Argentine is important, and argentine firms are able to compete in the design and

  15. Thai research reactor

    International Nuclear Information System (INIS)

    The Office of Atomic Energy for Peace (OAEP) was established in 1962, as a reactor center, by the virtue of the Atomic Energy for Peace Act, under operational policy and authority of the Thai Atomic Energy for Peace Commission (TAEPC); and under administration of Ministry of Science, Technology and Energy. It owns and operates the only Thai Research Reactor (TRR-1/M1). The TRR-1/M1 is a mixed reactor system constituting of the old MTR type swimming pool, irradiation facilities and cooling system; and TRIGA Mark III core and control instrumentation. The general performance of TRR-1/M1 is summarized in Table I. The safe operation of TRR-1/M1 is regulated by Reactor Safety Committee (RSC), established under TAEPC, and Health Physics Group of OAEP. The RCS has responsibility and duty to review of and make recommendations on Reactor Standing Orders, Reactor Operation Procedures, Reactor Core Loading and Requests for Reactor Experiments. In addition,there also exist of Emergency Procedures which is administered by OAEP. The Reactor Operation Procedures constitute of reactor operating procedures, system operating procedures and reactor maintenance procedures. At the level of reactor routine operating procedures, there is a set of Specifications on Safety and Operation Limits and Code of Practice from which reactor shift supervisor and operators must follow in order to assure the safe operation of TRR-1/M1. Table II is the summary of such specifications. The OAEP is now upgrading certain major components of the TRR-1/M1 such as the cooling system, the ventilation system and monitoring equipment to ensure their adequately safe and reliable performance under normal and emergency conditions. Furthermore, the International Atomic Energy Agency has been providing assistance in areas of operation and maintenance and safety analysis. (author)

  16. Nuclear Reactor Physics

    Science.gov (United States)

    Stacey, Weston M.

    2001-02-01

    An authoritative textbook and up-to-date professional's guide to basic and advanced principles and practices Nuclear reactors now account for a significant portion of the electrical power generated worldwide. At the same time, the past few decades have seen an ever-increasing number of industrial, medical, military, and research applications for nuclear reactors. Nuclear reactor physics is the core discipline of nuclear engineering, and as the first comprehensive textbook and reference on basic and advanced nuclear reactor physics to appear in a quarter century, this book fills a large gap in the professional literature. Nuclear Reactor Physics is a textbook for students new to the subject, for others who need a basic understanding of how nuclear reactors work, as well as for those who are, or wish to become, specialists in nuclear reactor physics and reactor physics computations. It is also a valuable resource for engineers responsible for the operation of nuclear reactors. Dr. Weston Stacey begins with clear presentations of the basic physical principles, nuclear data, and computational methodology needed to understand both the static and dynamic behaviors of nuclear reactors. This is followed by in-depth discussions of advanced concepts, including extensive treatment of neutron transport computational methods. As an aid to comprehension and quick mastery of computational skills, he provides numerous examples illustrating step-by-step procedures for performing the calculations described and chapter-end problems. Nuclear Reactor Physics is a useful textbook and working reference. It is an excellent self-teaching guide for research scientists, engineers, and technicians involved in industrial, research, and military applications of nuclear reactors, as well as government regulators who wish to increase their understanding of nuclear reactors.

  17. Reactor containment and reactor safety in the United States

    International Nuclear Information System (INIS)

    The reactor safety systems of two reactors are studied aiming at the reactor containment integrity. The first is a BWR type reactor and is called Peachbottom 2, and the second is a PWR type reactor, and is called surry. (E.G.)

  18. TRIGA reactor main systems

    International Nuclear Information System (INIS)

    This module describes the main systems of low power (<2 MW) and higher power (≥2 MW) TRIGA reactors. The most significant difference between the two is that forced reactor cooling and an emergency core cooling system are generally required for the higher power TRIGA reactors. However, those TRIGA reactors that are designed to be operated above 3 MW also use a TRIGA fuel that is specifically designed for those higher power outputs (3 to 14 MW). Typical values are given for the respective systems although each TRIGA facility will have unique characteristics that may only be determined by the experienced facility operators. Due to the inherent wide scope of these research reactor facilities construction and missions, this training module covers those systems found at most operating TRIGA reactor facilities but may also discuss non-standard equipment that was found to be operationally useful although not necessarily required. (author)

  19. Evaluation of research reactors

    International Nuclear Information System (INIS)

    The present status of research reactors with highly enriched (93%) uranium fuel at JAERI, JRR-2 and JMTR is described. JRR-2 is a heterogeneous type of reactor, using heavy water as moderator and coolant. It uses both MTR type and cylindrical type of fuel elements. The maximum thermal power and the thermal neutron flux are 10 MW and 2x1014 n/cm2 see respectively. The reactor has been used for various experiments such as solid state physics, material irradiation, reactor fuel irradiation and radioisotope production. The JMTR is a multi-purpose tank type material testing reactor, and light water moderator and coolant, operated at 50 MW. The evaluation of lower enriched fuel and its consequences for both reactors is considered more especially

  20. Multipurpose research reactors

    International Nuclear Information System (INIS)

    The international symposium on the utilization of multipurpose research reactors and related international co-operation was organized by the IAEA to provide for information exchange on current uses of research reactors and international co-operative projects. The symposium was attended by about 140 participants from 36 countries and two international organizations. There were 49 oral presentations of papers and 24 poster presentations. The presentations were divided into 7 sessions devoted to the following topics: neutron beam research and applications of neutron scattering (6 papers and 1 poster), reactor engineering (6 papers and 5 posters), irradiation testing of fuel and material for fission and fusion reactors (6 papers and 10 posters), research reactor utilization programmes (13 papers and 4 posters), neutron capture therapy (4 papers), neutron activation analysis (3 papers and 4 posters), application of small reactors in research and training (11 papers). A separate abstract was prepared for each of these papers. Refs, figs and tabs

  1. The nuclear soliton reactor

    International Nuclear Information System (INIS)

    The basic reactor physics of a completely novel nuclear fission reactor design - the soliton-reactor - is presented on the basis of a simple model. In such a reactor, the neutrons in the critical region convert either fertile material in the adjacent layers into fissile material or reduce the poisoning of fissile material in such a manner that successively new critical regions emerge. The result is an autocatalytically driven burn-up wave which propagates throughout the reactor. Thereby, the relevant characteristic spatial distributions (neutron flux, specific power density and the associated particle densities) are solitons - wave phenomena resulting from non-linear partial differential equations which do not change their shape during propagation. A qualitativley new kind of harnessing nuclear fission energy may become possible with fuel residence times comparable with the useful lifetime of the reactor system. In the long run, fast breeder systems which exploit the natural uranium and thorium resources, without any reprocessing capacity are imaginable. (orig.)

  2. Fast Spectrum Reactors

    CERN Document Server

    Todd, Donald; Tsvetkov, Pavel

    2012-01-01

    Fast Spectrum Reactors presents a detailed overview of world-wide technology contributing to the development of fast spectrum reactors. With a unique focus on the capabilities of fast spectrum reactors to address nuclear waste transmutation issues, in addition to the well-known capabilities of breeding new fuel, this volume describes how fast spectrum reactors contribute to the wide application of nuclear power systems to serve the global nuclear renaissance while minimizing nuclear proliferation concerns. Readers will find an introduction to the sustainable development of nuclear energy and the role of fast reactors, in addition to an economic analysis of nuclear reactors. A section devoted to neutronics offers the current trends in nuclear design, such as performance parameters and the optimization of advanced power systems. The latest findings on fuel management, partitioning and transmutation include the physics, efficiency and strategies of transmutation, homogeneous and heterogeneous recycling, in addit...

  3. Fusion reactor research

    International Nuclear Information System (INIS)

    This work covers four separate areas: (1) development of technology for processing liquid lithium from blankets, (2) investigation of hydrogen isotope permeation in candidate structural metals and alloys for near-term fusion reactors, (3) analytical studies encompassing fusion reactor thermal hydraulics, tritium facility design, and fusion reactor safety, and (4) studies involving dosimetry and damage analysis. Recent accomplishments in each of these areas are summarized

  4. The Integral Fast Reactor

    International Nuclear Information System (INIS)

    The Integral Fast Reactor (IFR) is an innovative liquid metal reactor concept being developed at Argonne National Laboratory. It seeks to specifically exploit the inherent properties of liquid metal cooling and metallic fuel in a way that leads to substantial improvements in the characteristics of the complete reactor system. This paper describes the key features and potential advantages of the IFR concept, with emphasis on its safety characteristics. 3 refs., 4 figs., 1 tab

  5. The replacement research reactor

    International Nuclear Information System (INIS)

    As a consequences of the government decision in September 1997. ANSTO established a replacement research reactor project to manage the procurement of the replacement reactor through the necessary approval, tendering and contract management stages This paper provides an update of the status of the project including the completion of the Environmental Impact Statement. Prequalification and Public Works Committee processes. The aims of the project, management organisation, reactor type and expected capabilities are also described

  6. PFBR reactor protection

    International Nuclear Information System (INIS)

    Design philosophy adopted for Prototype Fast breeder Reactor (PFBR) is a classical one and has the following features: triplicated sensors for measuring important safety parameters; two independent reactor protection Logic Systems based on solid state devices; reactivity control achieved by control rods; gas equipped modules at the core blanket interface providing negative reactivity. Design verification of these features showed that safety of the reactor can be achieved by a traditional approach since the inherent features of LMFBR make this easy

  7. Reactor BR2

    International Nuclear Information System (INIS)

    The BR2 reactor is still SCK-CEN's most important nuclear facility. After an extensive refurbishment to compensate for the ageing of the installation, the reactor was restarted in April 1997. Various aspects concerning the operation of the BR2 Reactor, the utilisation of the CALLISTO loop and the irradiation programme, the BR2 R and D programme and the production of isotopes and of NTD-silicon are discussed. Progress and achievements in 1999 are reported

  8. TRIGA reactor characteristics

    International Nuclear Information System (INIS)

    This module describes the general design, characteristics and parameters of TRIGA reactors and fuels. It is recommended that most of this information should be incorporated into any reactor operator training program and, in many cases, the facility Safety Analysis Report. It is oriented to teach the basics of the physics and mechanical design of the TRIGA fuel as well as its unique operational characteristics and the differences between TRIGA fuels and others more traditional reactor fuels. (nevyjel)

  9. Reactor Safety Analysis

    International Nuclear Information System (INIS)

    The objective of SCK-CEN's programme on reactor safety is to develop expertise in probabilistic and deterministic reactor safety analysis. The research programme consists of four main activities, in particular the development of software for reliability analysis of large systems and participation in the international PHEBUS-FP programme for severe accidents, the development of an expert system for the aid to diagnosis; the development and application of a probabilistic reactor dynamics method. Main achievements in 1999 are reported

  10. Reactor Engineering Department annual report

    International Nuclear Information System (INIS)

    Research and development activities in the Department of Reactor Engineering in fiscal 1984 are described. The work of the Department is closely related to development of multipurpose Very High Temperature Gas Cooled Reactor and Fusion Reactor, and development of Liquid Metal Fast Breeder Reactor carried out by Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are achievements in fields such as nuclear data and group constants, theoretical method and code development, reactor physics experiment and analysis, fusion neutronics, shielding, reactor and nuclear instrumentation, reactor control and diagnosis, safeguards technology, and activities of the Committee on Reactor Physics. (author)

  11. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research and development activities in the Division of Reactor Engineering in fiscal 1981 are described. The work of the Division is closely related to development of multipurpose Very High Temperature Gas Cooled Reactor and fusion reactor, and development of Liquid Metal Fast Breeder Reactor carried out by Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are achievements in fields such as nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, reactor and nuclear instrumentation, reactor control and diagnosis, and fusion reactor technology, and activities of the Committee on Reactor Physics. (author)

  12. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research activities in the Division of Reactor Engineering in fiscal 1979 are described. The work of the Division is closely related to development of multi-purpose Very High Temperature Gas Cooled Reactor and fusion reactor, and development of Liquid Metal Fast Breeder Reactor carried out by Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are achievements in fields such as nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, reactor and nuclear instrumentation, reactor control and diagnosis, and fusion reactor technology, and activities of the Committees on Reactor Physics and on Decomissioning of Nuclear Facilities. (author)

  13. New reactor concepts

    International Nuclear Information System (INIS)

    The document gives a summary of new nuclear reactor concepts from a technological point of view. Belgium supports the development of the European Pressurized-Water Reactor, which is an evolutionary concept based on the European experience in Pressurized-Water Reactors. A reorientation of the Belgian choice for this evolutionary concept may be required in case that a decision is taken to burn plutonium, when the need for flexible nuclear power plants arises or when new reactor concepts can demonstrate proved benefits in terms of safety and cost

  14. Reactor construction steels

    International Nuclear Information System (INIS)

    The basic functions of light water reactor components are shown on the example of a pressurized water reactor and the requirements resulting therefrom for steel, the basic structural material, are derived. A detailed analysis of three main groups of reactor steels is presented and the applications are indicated of low-alloyed steels, high-alloyed austenitic steels, and steels with a high content of Ni and of alloying additions for steam generator pipes. An outline is given of prospective fast breeder reactor steels. (J.K.)

  15. Commercialization of fast reactors

    International Nuclear Information System (INIS)

    Comparative analysis has been performed of capital and fuel cycle costs for fast BN-type and pressurized light water VVER-type reactors. As a result of materials demand and components costs comparison of NPPs with VVER-1000 and BN-600 reactors, respectively, conclusion was made, that under equal conditions of the comparison, NPP with fast reactor had surpassed the specific capital cost of NPP with VVER by about 30 - 40 %. Ways were determined for further decrease of this difference, as well as for the fuel cycle cost reduction, because at present it is higher than that of VVER-type reactors. (author)

  16. Mirror fusion reactors

    International Nuclear Information System (INIS)

    Conceptual design studies were made of fusion reactors based on the three current mirror-confinement concepts: the standard mirror, the tandem mirror, and the field-reversed mirror. Recent studies of the standard mirror have emphasized its potential as a fusion-fission hybrid reactor, designed to produce fuel for fission reactors. We have designed a large commercial hybrid and a small pilot-plant hybrid based on standard mirror confinement. Tandem mirror designs include a commercial 1000-MWe fusion power plant and a nearer term tandem mirror hybrid. Field-reversed mirror designs include a multicell commercial reactor producing 75 MWe and a single-cell pilot plant

  17. Natural convection type reactor

    International Nuclear Information System (INIS)

    In a natural convection type nuclear reactor, a reactor core is disposed such that the top of the reactor core is always situated in a flooded position even if pipelines connected to the pressure vessel are ruptured and the level at the inside of the reactor vessel is reduced due to flashing. Further, a lower dry well situated below the pressure vessel is disposed such that it is in communication with a through hole to a pressure suppression chamber situated therearound and the reactor core is situated at the level lower than that of the through hole. If pipelines connected to the pressure vessel are ruptured to cause loss of water, although the water level is lowered after the end of the flashing, the reactor core is always flooded till the operation of a pressure accummulation water injection system to prevent the top of the reactor core even from temporary exposure. Further, injected water is discharged to the outside of the pressure vessel, transferred to the lower dry well, and flows through the through hole to the pressure control chamber and cools the surface of the reactor pressure vessel from the outside. Accordingly, the reactor core is cooled to surely and efficiently remove the after-heat. (N.H.)

  18. INVAP's Research Reactor Designs

    International Nuclear Information System (INIS)

    INVAP, an Argentine company founded more than three decades ago, is today recognized as one of the leaders within the research reactor industry. INVAP has participated in several projects covering a wide range of facilities, designed in accordance with the requirements of our different clients. For complying with these requirements, INVAP developed special skills and capabilities to deal with different fuel assemblies, different core cooling systems, and different reactor layouts. This paper summarizes the general features and utilization of several INVAP research reactor designs, from subcritical and critical assemblies to high-power reactors IAEA safety

  19. Reactor power control device

    International Nuclear Information System (INIS)

    The present invention provides a control device which can conduct scram and avoid lowering of the power of a nuclear power plant upon occurrence of earthquakes. Namely, the device of the present invention comprises, in addition to an existent power control device, (1) an earthquake detector for detecting occurrence and annihilation of earthquakes and (2) a reactor control device for outputting control rod operation signals and reactor core flow rate control signals depending on the earthquake detection signals from the detector, and reactor and plant information. With such a constitution, although the reactor is vibrated by earthquakes, the detector detects slight oscillations of the reactor by initial fine vibration waves as premonitory symptoms of serious earthquakes. The earthquake occurrence signals are outputted to the reactor control device. The reactor control device, receiving the signals, changes the position of control rods by way of control rod driving mechanisms to make the axial power distribution in the reactor core to a top peak type. As a result, even if the void amount in the reactor core is reduced by the subsequent actual earthquakes, since the void amount is moved, effects on the increase of neutron fluxes by the actual earthquakes is small. (I.S.)

  20. Nuclear reactor internals arrangement

    International Nuclear Information System (INIS)

    A nuclear reactor internals arrangement is disclosed which facilitates reactor refueling. A reactor vessel and a nuclear core is utilized in conjunction with an upper core support arrangement having means for storing withdrawn control rods therein. The upper core support is mounted to the underside of the reactor vessel closure head so that upon withdrawal of the control rods into the upper core support, the closure head, the upper core support and the control rods are removed as a single unit thereby directly exposing the core for purposes of refueling

  1. Fusion Reactor Materials

    International Nuclear Information System (INIS)

    The objective of SCK-CEN's programme on fusion reactor materials is to contribute to the knowledge on the radiation-induced behaviour of fusion reactor materials and components as well as to help the international community in building the scientific and technical basis needed for the construction of the future reactor. Ongoing projects include: the study of the mechanical and chemical (corrosion) behaviour of structural materials under neutron irradiation and water coolant environment; the investigation of the characteristics of irradiated first wall material such as beryllium; investigations on the management of materials resulting from the dismantling of fusion reactors including waste disposal. Progress and achievements in these areas in 2001 are discussed

  2. The research reactors their contribution to the reactors physics

    International Nuclear Information System (INIS)

    The 19 october 2000, the french society of nuclear energy organized a day on the research reactors. This associated report of the technical session, reactors physics, is presented in two parts. The first part deals with the annual meeting and groups general papers on the pressurized water reactors, the fast neutrons reactors and the fusion reactors industry. The second part presents more technical papers about the research programs, critical models, irradiation reactors (OSIRIS and Jules Horowitz) and computing tools. (A.L.B.)

  3. One piece reactor removal

    International Nuclear Information System (INIS)

    Japan Research Reactor No.3 (JRR-3) was the first reactor consisting of 'Japanese-made' components alone except for fuel and heavy water. After reaching its initial critical state in September 1962, JRR-3 had been in operation for 21 years until March 1983. It was decided that the reactor be removed en-bloc in view of the work schedule, cost and management of the reactor following the removal. In the special method developed jointly by the Japanese Atomic Energy Research Institute and Shimizu Construction Co., Ltd., the reactor main unit was cut off from the building by continuous core boring, with its major components bound in the block with biological shield material (heavy concrete), and then conveyed and stored in a large waste store building constructed near the reactor building. Major work processes described in this report include the cutting off, lifting, horizontal conveyance and lowering of the reactor main unit. The removal of the JRR-3 reactor main unit was successfully carried out safely and quickly by the en-block removal method with radiation exposure dose of the workers being kept at a minimum. Thus the high performance of the en-bloc removal method was demonstrated and, in addition, valuable knowhow and other data were obtained from the work. (Nogami, K.)

  4. Reactor Materials Research

    International Nuclear Information System (INIS)

    The activities of the Reactor Materials Research Department of the Belgian Nuclear Research Centre SCK-CEN in 2000 are summarised. The programmes within the department are focussed on studies concerning (1) fusion, in particular mechanical testing; (2) Irradiation Assisted Stress Corrosion Cracking (IASCC); (3) nuclear fuel; and (4) Reactor Pressure Vessel Steel (RPVS)

  5. The fusion reactor

    International Nuclear Information System (INIS)

    Basic principles of the fusion reactor are outlined. Plasma heating and confinement schemes are described. These confinement systems include the linear Z pinch, magnetic mirrors and Tokamaks. A fusion reactor is described and a discussion is given of its environmental impact and its fuel situation. (R.L.)

  6. Polymerization Reactor Engineering.

    Science.gov (United States)

    Skaates, J. Michael

    1987-01-01

    Describes a polymerization reactor engineering course offered at Michigan Technological University which focuses on the design and operation of industrial polymerization reactors to achieve a desired degree of polymerization and molecular weight distribution. Provides a list of the course topics and assigned readings. (TW)

  7. Reactor Materials Research

    Energy Technology Data Exchange (ETDEWEB)

    Van Walle, E

    2001-04-01

    The activities of the Reactor Materials Research Department of the Belgian Nuclear Research Centre SCK-CEN in 2000 are summarised. The programmes within the department are focussed on studies concerning (1) fusion, in particular mechanical testing; (2) Irradiation Assisted Stress Corrosion Cracking (IASCC); (3) nuclear fuel; and (4) Reactor Pressure Vessel Steel (RPVS)

  8. Gas-cooled reactors

    International Nuclear Information System (INIS)

    The present study is the second part of a general survey of Gas Cooled Reactors (GCRs). In this part, the course of development, overall performance and present development status of High Temperature Gas Cooled Reactors (HTCRs) and advances of HTGR systems are reviewed. (author)

  9. Light water reactor program

    Energy Technology Data Exchange (ETDEWEB)

    Franks, S.M.

    1994-12-31

    The US Department of Energy`s Light Water Reactor Program is outlined. The scope of the program consists of: design certification of evolutionary plants; design, development, and design certification of simplified passive plants; first-of-a-kind engineering to achieve commercial standardization; plant lifetime improvement; and advanced reactor severe accident program. These program activities of the Office of Nuclear Energy are discussed.

  10. Reactor Safety Analysis

    International Nuclear Information System (INIS)

    The objective of SCK-CEN's programme on reactor safety is to develop expertise in probabilistic and deterministic reactor safety analysis. The research programme consists of two main activities, in particular the development of software for reliability analysis of large systems and participation in the international PHEBUS-FP programme for severe accidents. Main achievements in 1999 are reported

  11. Light water type reactor

    International Nuclear Information System (INIS)

    The nuclear reactor of the present invention prevents disruption of a reactor core even in a case of occurrence of entire AC power loss event, and even if a reactor core disruption should occur, it prevents a rupture of the reactor container due to excess heating. That is, a high pressure water injection system and a low pressure water injection system operated by a diesel engine are disposed in the reactor building in addition to an emergency core cooling system. With such a constitution, even if an entire AC power loss event should occur, water can surely be injected to the reactor thereby enabling to prevent the rupture of the reactor core. Even if it should be ruptured, water can be sprayed to the reactor container by the low pressure water injection system. Further, if each of water injection pumps of the high pressure water injection system and the low pressure water injection system can be driven also by motors in addition to the diesel engine, the pump operation can be conducted more certainly and integrally. (I.S.)

  12. Naval propulsion reactors

    International Nuclear Information System (INIS)

    This article deals with the design and exploitation of naval propulsion reactors, mainly of PWR-type. The other existing or conceivable types of reactors are also presented: 1 - specificities of nuclear propulsion (integration in the ship, marine environment, maneuverability, instantaneous availability, conditions of exploitation-isolation, nuclear safety, safety authority); 2 - PWR-type reactor (stable operation, mastered technology, general design, radiation protection); 3 - other reactor types; 4 - compact or integrated loops architecture; 5 - radiation protection; 6 - reactor core; 7 - reactivity control (core lifetime, control means and mechanisms); 8 - core cooling (natural circulation, forced circulation, primary flow-rate program); 9 - primary loop; 10 - pressurizer; 11 - steam generators and water-steam secondary loop; 12 - auxiliary and safety loops; 13 - control instrumentation; 14 - operation; 15 - nuclear wastes and dismantling. (J.S.)

  13. Iris reactor conceptual design

    International Nuclear Information System (INIS)

    IRIS (International Reactor Innovative and Secure) is a modular, integral, light water cooled, low-to-medium power (100-350 MWe) reactor which addresses the requirements defined by the US DOE for Generation IV reactors, i.e., proliferation resistance, enhanced safety, improved economics and fuel cycle sustainability. It relies on the proven technology of light water reactors and features innovative engineering, but it does not require new technology development. This paper discusses the current reference IRIS design, which features a 1000 MWt thermal core with proven 5%-enriched uranium oxide fuel and five-year long straight burn fuel cycle, integral reactor vessel housing helical tube steam generators and immersed spool pumps. Other major contributors to the high level of safety and economic attractiveness are the safety by design and optimized maintenance approaches, which allow elimination of some classes of accidents, lower capital cost, long operating cycle, and high capacity factors. (author)

  14. Research reactor DHRUVA

    International Nuclear Information System (INIS)

    DHRUVA, a 100 MWt research reactor located at the Bhabha Atomic Research Centre, Bombay, attained first criticality during August, 1985. The reactor is fuelled with natural uranium and is cooled, moderated and reflected by heavy water. Maximum thermal neutron flux obtained in the reactor is 1.8 X 1014 n/cm2/sec. Some of the salient design features of the reactor are discussed in this paper. Some important features of the reactor coolant system, regulation and protection systems and experimental facilities are presented. A short account of the engineered safety features is provided. Some of the problems that were faced during commissioning and the initial phase of power operation are also dealt upon

  15. Reactor core monitoring method

    Energy Technology Data Exchange (ETDEWEB)

    Mori, Michitsugu [Tokyo Electric Power Co., Inc. (Japan); Kanemoto, Shigeru; Enomoto, Mitsuhiro; Ebata, Shigeo

    1998-05-06

    The present invention provides a method of monitoring the state of coolant flow in a reactor of a BWR power plant. Namely, a plurality of local power region monitors (LPRM) are disposed to the inside of the reactor core for monitoring a power distribution. Signals of at least two optional LPRM detectors situated at positions different in axial or radial positions of the reactor core are obtained. General fluctuation components which nuclear hydrothermally fluctuate in overall reactor core are removed from the components of the signals. Then, correlational functions between these signals are determined. The state of coolant flow in the reactor is monitored based on the correlational function. When the axial flowing rate and radial flow interference are monitored, the accuracy upon monitoring axial and radial local behaviors of coolants can be improved by thus previously removing the general fluctuation components from signals of LPRM detectors and extracting local void information near to LPRM detectors at high accuracy. (I.S.)

  16. Physics of nuclear reactors

    International Nuclear Information System (INIS)

    This manual covers all the aspects of the science of neutron transport in nuclear reactors and can be used with great advantage by students, engineers or even reactor experts. It is composed of 18 chapters: 1) basis of nuclear physics, 2) the interactions of neutrons with matter, 3) the interactions of electromagnetic radiations and charged-particles with matter, 4) neutron slowing-down, 5) resonant absorption, 6) Doppler effect, 7) neutron thermalization, 8) Boltzmann equation, 9) calculation methods in neutron transport theory, 10) neutron scattering, 11) reactor reactivity, 12) theory of the critical homogenous pile, 13) the neutron reflector, 14) the heterogeneous reactor, 15) the equations of the fuel cycle, 16) neutron counter-reactions, 17) reactor kinetics, and 18) calculation methods in neutron scattering

  17. Mirror reactor surface study

    International Nuclear Information System (INIS)

    A general survey is presented of surface-related phenomena associated with the following mirror reactor elements: plasma first wall, ion sources, neutral beams, director converters, vacuum systems, and plasma diagnostics. A discussion of surface phenomena in possible abnormal reactor operation is included. Several studies which appear to merit immediate attention and which are essential to the development of mirror reactors are abstracted from the list of recommended areas for surface work. The appendix contains a discussion of the fundamentals of particle/surface interactions. The interactions surveyed are backscattering, thermal desorption, sputtering, diffusion, particle ranges in solids, and surface spectroscopic methods. A bibliography lists references in a number of categories pertinent to mirror reactors. Several complete published and unpublished reports on surface aspects of current mirror plasma experiments and reactor developments are also included

  18. FBR type reactor

    International Nuclear Information System (INIS)

    A circular neutron reflector is disposed vertically movably so as to surround the outer circumference of a reactor core barrel. A reflector driving device comprises a driving device main body attracted to the outer wall surface of the reactor barrel by electromagnetic attraction force and an inertia body disposed above the driving device main body vertically movably. A reflector is connected below the reactor driving device. At the initial stage, a spontaneous large current is supplied to upper electromagnetic repulsion coils of the reflector driving device, impact electromagnetic repulsion force is caused between the inertia body and the reflector driving device, so that the driving device main body moves downwardly by a predetermined distance and stopped. The reflector driving device can be lowered in a step-like manner to an appropriate position suitable to restart the reactor during stoppage of the reactor core by conducting spontaneous supply of current repeatedly to the upper electromagnetic repulsion coils. (I.N.)

  19. TRIGA research reactors

    International Nuclear Information System (INIS)

    TRIGA (Training, Research, Isotope production, General-Atomic) has become the most used research reactor in the world with 65 units operating in 24 countries. The original patent for TRIGA reactors was registered in 1958. The success of this reactor is due to its inherent level of safety that results from a prompt negative temperature coefficient. Most of the neutron moderation occurs in the nuclear fuel (UZrH) because of the presence of hydrogen atoms, so in case of an increase of fuel temperature, the neutron spectrum becomes harder and neutrons are less likely to fission uranium nuclei and as a consequence the power released decreases. This inherent level of safety has made this reactor fit for training tool in university laboratories. Some recent versions of TRIGA reactors have been designed for medicine and industrial isotope production, for neutron therapy of cancers and for providing a neutron source. (A.C.)

  20. Status of French reactors

    Energy Technology Data Exchange (ETDEWEB)

    Ballagny, A. [Commissariat a l`Energie Atomique, Saclay (France)

    1997-08-01

    The status of French reactors is reviewed. The ORPHEE and RHF reactors can not be operated with a LEU fuel which would be limited to 4.8 g U/cm{sup 3}. The OSIRIS reactor has already been converted to LEU. It will use U{sub 3}Si{sub 2} as soon as its present stock of UO{sub 2} fuel is used up, at the end of 1994. The decision to close down the SILOE reactor in the near future is not propitious for the start of a conversion process. The REX 2000 reactor, which is expected to be commissioned in 2005, will use LEU (except if the fast neutrons core option is selected). Concerning the end of the HEU fuel cycle, the best option is reprocessing followed by conversion of the reprocessed uranium to LEU.

  1. Nuclear reactor design

    CERN Document Server

    2014-01-01

    This book focuses on core design and methods for design and analysis. It is based on advances made in nuclear power utilization and computational methods over the past 40 years, covering core design of boiling water reactors and pressurized water reactors, as well as fast reactors and high-temperature gas-cooled reactors. The objectives of this book are to help graduate and advanced undergraduate students to understand core design and analysis, and to serve as a background reference for engineers actively working in light water reactors. Methodologies for core design and analysis, together with physical descriptions, are emphasized. The book also covers coupled thermal hydraulic core calculations, plant dynamics, and safety analysis, allowing readers to understand core design in relation to plant control and safety.

  2. Compact torsatron reactors

    International Nuclear Information System (INIS)

    Low-aspect-ratio torsatron configurations could lead to compact stellarator reactors with R0 = 8--11m, roughly one-half to one-third the size of more conventional stellarator reactor designs. Minimum-size torsatron reactors are found using various assumptions. Their size is relatively insensitive to the choice of the conductor parameters and depends mostly on geometrical constraints. The smallest size is obtained by eliminating the tritium breeding blanket under the helical winding on the inboard side and by reducing the radial depth of the superconducting coil. Engineering design issues and reactor performance are examined for three examples to illustrate the feasibility of this approach for compact reactors and for a medium-size (R0 ≅ 4 m,/bar a/ /approx lt/ 1 m) copper-coil ignition experiment. 26 refs., 11 figs., 7 tabs

  3. Multi-purpose reactor

    International Nuclear Information System (INIS)

    The Multi-Purpose-Reactor (MPR), is a pool-type reactor with an open water surface and variable core arrangement. Its main feature is plant safety and reliability. Its power is 22MWth, cooled by light water and moderated by beryllium. It has platetype fuel elements (MTR type, approx. 20%. enriched uranium) clad in aluminium. Its cobalt (Co60) production capacity is 50000 Ci/yr, 200Ci/gr. The distribution of the reactor core and associated control and safety systems is essentially based on the following design criteria: - upwards cooling flow, to waive the need for cooling flow inversion in case the reactor is cooled by natural convection if confronted with a loss of pumping power, and in order to establish a superior heat transfer potential (a higher coolant saturation temperature); - easy access to the reactor core from top of pool level with the reactor operating at full power, in order to facilitate actual implementation of experiments. Consequently, mechanisms associated to control and safety rods s,re located underneath the reactor tank; - free access of reactor personnel to top of pool level with the reactor operating at full power. This aids in the training of personnel and the actual carrying out of experiments, hence: - a vast water column was placed over the core to act as radiation shielding; - the core's external area is cooled by a downwards flow which leads to a decay tank beyond the pool (for N16 to decay); - a small downwards flow was directed to stream downwards from above the reactor core in order to drag along any possibly active element; and - a stagnant hot layer system was placed at top of pool level so as to minimize the upwards coolant flow rising towards pool level

  4. The CAREM reactor and present currents in reactor design

    International Nuclear Information System (INIS)

    INVAP has been working on the CAREM project since 1983. It concerns a very low power reactor for electrical energy generation. The design of the reactor and the basic criteria used were described in 1984. Since then, a series of designs have been presented for reactors which are similar to CAREM regarding the solutions presented to reduce the chance of major nuclear accidents. These designs have been grouped under different names: Advanced Reactors, Second Generation Reactors, Inherently Safe Reactors, or even, Revolutionary Reactors. Every reactor fabrication firm has, at least, one project which can be placed in this category. Presently, there are two main currents of Reactor Design; Evolutionary and Revolutionary. The present work discusses characteristics of these two types of reactors, some revolutionary designs and common criteria to both types. After, these criteria are compared with CAREM reactor design. (Author)

  5. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research activities in the Division of Reactor Engineering in fiscal 1977 are described. Works of the Division are development of multi-purpose Very High Temperature Gas Cooled Reactor, fusion reactor engineering, and development of Liquid Metal Fast Breeder Reactor for Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, heat transfer and fluid dynamics, reactor and nuclear instrumentation, dynamics analysis and control method development, fusion reactor technology, and Committee on Reactor Physics. (Author)

  6. Reactor Engineering Department annual report

    International Nuclear Information System (INIS)

    Research and development activities in the Department of Reactor Engineering in fiscal 1983 are described. The work of the Department is closely related to development of multipurpose Very High Temperature Gas Cooled Reactor and Fusion Reactor, and development of Liquid Metal Fast Breeder Reactor carried out by Power Reactor and Nuclear Fuel Development Corporation. Contents of the report are achievements in fields such as nuclear data and group constants, theoretical method and code development, integral experiment and analysis, fusion neutronics, shielding, reactor and nuclear instrumentation, reactor control and diagnosis, and safeguards technology, and activities of the Committee on Reactor Physics. (author)

  7. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research activities conducted in Reactor Engineering Division in fiscal 1975 are summarized in this report. Works in the division are closely related to the development of multi-purpose High-temperature Gas Cooled Reactor, the development of Liquid Metal Fast Breeder Reactor by Power Reactor and Nuclear Fuel Development Corporation, and engineering research of thermonuclear fusion reactor. Many achievements are described concerning nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, heat transfer and fluid dynamics, reactor and nuclear instrumentation, dynamics analysis and control method development, fusion reactor technology and activities of the Committee on Reactor Physics. (auth.)

  8. Reactor performance calculations for water reactors

    International Nuclear Information System (INIS)

    The principles of nuclear, thermal and hydraulic performance calculations for water cooled reactors are discussed. The principles are illustrated by describing their implementation in the UKAEA PATRIARCH scheme of computer codes. This material was originally delivered as a course of lectures at the Technical University of Helsinki in Summer of 1969.

  9. Fourth Generation Reactor Concepts

    International Nuclear Information System (INIS)

    Concerns over energy resources availability, climate changes and energy supply security suggest an important role for nuclear energy in future energy supplies. So far nuclear energy evolved through three generations and is still evolving into new generation that is now being extensively studied. Nuclear Power Plants are producing 16% of the world's electricity. Today the world is moving towards hydrogen economy. Nuclear technologies can provide energy to dissociate water into oxygen and hydrogen and to production of synthetic fuel from coal gasification. The introduction of breeder reactors would turn nuclear energy from depletable energy supply into an unlimited supply. From the early beginnings of nuclear energy in the 1940s to the present, three generations of nuclear power reactors have been developed: First generation reactors: introduced during the period 1950-1970. Second generation: includes commercial power reactors built during 1970-1990 (PWR, BWR, Candu, Russian RBMK and VVER). Third generation: started being deployed in the 1990s and is composed of Advanced LWR (ALWR), Advanced BWR (ABWR) and Passive AP600 to be deployed in 2010-2030. Future advances of the nuclear technology designs can broaden opportunities for use of nuclear energy. The fourth generation reactors are expected to be deployed by 2030 in time to replace ageing reactors built in the 1970s and 1980s. The new reactors are to be designed with a view of the following objectives: economic competitiveness, enhanced safety, minimal radioactive waste production, proliferation resistance. The Generation IV International Forum (GIF) was established in January 2000 to investigate innovative nuclear energy system concepts. GIF members include Argentina, Brazil, Canada, Euratom, France Japan, South Africa, South Korea, Switzerland, United Kingdom and United States with the IAEA and OECD's NEA as permanent observers. China and Russia are expected to join the GIF initiative. The following six systems

  10. Safety of research reactors

    International Nuclear Information System (INIS)

    The number of research reactors that have been constructed worldwide for civilian applications is about 651. Of the reactors constructed, 284 are currently in operation, 258 are shut down and 109 have been decommissioned. More than half of all operating research reactors worldwide are over thirty years old. During this long period of time national priorities have changed. Facility ageing, if not properly managed, has a natural degrading effect. Many research reactors face concerns with the obsolescence of equipment, lack of experimental programmes, lack of funding for operation and maintenance and loss of expertise through ageing and retirement of the staff. Other reactors of the same vintage maintain effective ageing management programmes, conduct active research programmes, develop and retain high calibre personnel and make important contributions to society. Many countries that operate research reactors neither operate nor plan to operate power reactors. In most of these countries there is a tendency not to create a formal regulatory body. A safety committee, not always independent of the operating organization, may be responsible for regulatory oversight. Even in countries with nuclear power plants, a regulatory regime differing from the one used for the power plants may exist. Concern is therefore focused on one tail of a continuous spectrum of operational performance. The IAEA has been sending missions to review the safety of research reactors in Member States since 1972. Some of the reviews have been conducted pursuant to the IAEA' functions and responsibilities regarding research reactors that are operated within the framework of Project and Supply Agreements between Member States and the IAEA. Other reviews have been conducted upon request. All these reviews are conducted following procedures for Integrated Safety Assessment of Research Reactors (INSARR) missions. The prime objective of these missions has been to conduct a comprehensive operational safety

  11. Reactor Engineering Department annual report

    International Nuclear Information System (INIS)

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

  12. Reactor engineering department annual report

    International Nuclear Information System (INIS)

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

  13. Slurry reactor design studies

    Energy Technology Data Exchange (ETDEWEB)

    Fox, J.M.; Degen, B.D.; Cady, G.; Deslate, F.D.; Summers, R.L. (Bechtel Group, Inc., San Francisco, CA (USA)); Akgerman, A. (Texas A and M Univ., College Station, TX (USA)); Smith, J.M. (California Univ., Davis, CA (USA))

    1990-06-01

    The objective of these studies was to perform a realistic evaluation of the relative costs of tublar-fixed-bed and slurry reactors for methanol, mixed alcohols and Fischer-Tropsch syntheses under conditions where they would realistically be expected to operate. The slurry Fischer-Tropsch reactor was, therefore, operated at low H{sub 2}/CO ratio on gas directly from a Shell gasifier. The fixed-bed reactor was operated on 2.0 H{sub 2}/CO ratio gas after adjustment by shift and CO{sub 2} removal. Every attempt was made to give each reactor the benefit of its optimum design condition and correlations were developed to extend the models beyond the range of the experimental pilot plant data. For the methanol design, comparisons were made for a recycle plant with high methanol yield, this being the standard design condition. It is recognized that this is not necessarily the optimum application for the slurry reactor, which is being proposed for a once-through operation, coproducing methanol and power. Consideration is also given to the applicability of the slurry reactor to mixed alcohols, based on conditions provided by Lurgi for an Octamix{trademark} plant using their standard tubular-fixed reactor technology. 7 figs., 26 tabs.

  14. FBR type reactor

    International Nuclear Information System (INIS)

    The present invention provides an FBR type reactor in which the combustion of reactor core fuels is controlled by reflectors, and the position of a reflector driving device can be controlled even during shut down of the reactor. Namely, the reflector driving device is attracted to the outer wall surface of a reactor core barrel by electromagnetic attraction force. An inertia body is disposed vertically movably to the upper portion of the reflector driving device. Magnetic repulsive coils generate instantaneous magnetic repulsive force between the inertia body and the reflector driving device. With such a constitution, the reflector driving device can be driven by using magnetic repulsion of the electromagnetic repulsive coils and inertia of the inertia body. As a result, not only the reflectors can be elevated at an ultraslow speed during normal reactor operation, but also fine position adjustment for the reflector driving device, as well as fine position adjustment of the reflectors required upon restart of the reactor can be conducted by lowering the reflector driving device during shut down of the reactor. (I.S.)

  15. Reactor water sampling device

    International Nuclear Information System (INIS)

    The present invention concerns a reactor water sampling device for sampling reactor water in an in-core monitor (neutron measuring tube) housing in a BWR type reactor. The upper end portion of a drain pipe of the reactor water sampling device is attached detachably to an in-core monitor flange. A push-up rod is inserted in the drain pipe vertically movably. A sampling vessel and a vacuum pump are connected to the lower end of the drain pipe. A vacuum pump is operated to depressurize the inside of the device and move the push-up rod upwardly. Reactor water in the in-core monitor housing flows between the drain pipe and the push-up rod and flows into the sampling vessel. With such a constitution, reactor water in the in-core monitor housing can be sampled rapidly with neither opening the lid of the reactor pressure vessel nor being in contact with air. Accordingly, operator's exposure dose can be reduced. (I.N.)

  16. Test reactor technology

    International Nuclear Information System (INIS)

    The Reactor Development Program created a need for engineering testing of fuels and materials. The Engineering Test Reactors were developed around the world in response to this demand. The design of the test reactors proved to be different from that of power reactors, carrying the fuel elements closer to the threshold of failure, requiring more responsive instrumentation, more rapid control element action, and inherent self-limiting behavior under accident conditions. The design of the experimental facilities to exploit these reactors evolved a new, specialized, branch of engineering, requiring a very high-lvel scientific and engineering team, established a meticulous concern with reliability, the provision for recovery from their own failures, and detailed attention to possible interactions with the test reactors. This paper presents this technology commencing with the Materials Testing Reactor (MTR) through the Fast Flux Test Facility, some of the unique experimental facilities developed to exploit them, but discusses only cursorily the experiments performed, since sample preparation and sample analyses were, and to some extent still are, either classified or proprietary. The Nuclear Engineering literature is filled with this information

  17. Advanced reactor licensing issues

    International Nuclear Information System (INIS)

    In July 1986 the US Nuclear Regulatory Commission issued a Policy Statement on the Regulation of Advanced Nuclear Power Plants. As part of this policy advanced reactor designers were encouraged to interact with NRC early in the design process to obtain feedback regarding licensing requirements for advanced reactors. Accordingly, the staff has been interacting with the Department of Energy (DOE) and its contractors on the review of three advanced reactor conceptual designs: one modular High Temperature Gas-Cooled Reactor (MHTGR) and two Liquid Metal Reactors (LMRs). As a result of these interactions certain safety issues associated with these advanced reactor designs have been identified as key to the licensability of the designs as proposed by DOE. The major issues in this regard are: (1) selection and treatment of accident scenarios; (2) selection of siting source term; (3) performance and reliability of reactor shutdown and decay heat removal systems; (4) need for conventional containment; (5) need for conventional emergency evacuation; (6) role of the operator; (7) treatment of balance of plant; and (8) modular approach. This paper provides a status of the NRC review effort, describes the above issues in more detail and provides the current status and approach to the development of licensing guidance on each

  18. Nuclear reactor power monitor

    International Nuclear Information System (INIS)

    The device of the present invention monitors phenomena occurred in a nuclear reactor more accurately than usual case. that is, the device monitors a reactor power by signals sent from a great number of neutron monitors disposed in the reactor. The device has a means for estimating a phenomenon occurred in the reactor based on the relationship of a difference of signals between each of the great number of neutron monitors to the positions of the neutron monitors disposed in the reactor. The estimation of the phenomena is conducted by, for example, conversion of signals sent from the neutron monitors to a code train. Then, a phenomenon is estimated rapidly by matching the code train described above with a code train contained in a data base. Further. signals sent from the neutron monitors are processed statistically to estimate long term and periodical phenomena. As a result, phenomena occurred in the reactor are monitored more accurately than usual case, thereby enabling to improve reactor safety and operationability. (I.S.)

  19. Reactor Sharing Program

    International Nuclear Information System (INIS)

    Support utilization of the RINSC reactor for student and faculty instructions and research. The Department of Energy award has provided financial assistance during the period 9/29/1995 to 5/31/2001 to support the utilization of the Rhode Island Nuclear Science Center (RINSC) reactor for student and faculty instruction and research by non-reactor owning educational institutions within approximately 300 miles of Narragansett, Rhode Island. Through the reactor sharing program, the RINSC (including the reactor and analytical laboratories) provided reactor services and laboratory space that were not available to the other universities and colleges in the region. As an example of services provided to the users: Counting equipment, laboratory space, pneumatic and in-pool irradiations, demonstrations of sample counting and analysis, reactor tours and lectures. Funding from the Reactor Sharing Program has provided the RINSC to expand student tours and demonstration programs that emphasized our long history of providing these types of services to the universities and colleges in the area. The funding have also helped defray the cost of the technical assistance that the staff has routinely provided to schools, individuals and researchers who have called on the RINSC for resolution of problems relating to nuclear science. The reactor has been featured in a Public Broadcasting System documentary on Pollution in the Arctic and how a University of Rhode Island Professor used Neutron Activation Analysis conducted at the RINSC to discover the sources of the ''Arctic Haze''. The RINSC was also featured by local television on Earth Day for its role in environmental monitoring

  20. Determination of research reactor safety parameters by reactor calculations

    International Nuclear Information System (INIS)

    Main research reactor safety parameters such as power density peaking factors, shutdown margin and temperature reactivity coefficients are treated. Reactor physics explanation of the parameters is given together with their application in safety evaluation performed as part of research reactor operation. Reactor calculations are presented as a method for their determination assuming use of widely available computer codes. (author)

  1. Reactor de plasma

    OpenAIRE

    Erra Serrabasa, Pilar; Molina Mansilla, Ricardo; Beltrán Serra, Eric

    2008-01-01

    Reactor de plasma. Se trata de un reactor de plasma que puede trabajar en un amplio rango de presión, desde el vacío y presiones reducidas hasta la presión atmosférica y presiones superiores. Adicionalmente el reactor de plasma tiene la capacidad de regular otros parámetros importantes y permite su uso para el tratamiento de muestras de tipología muy diversa, como por ejemplo las de tamaño relativamente grande o de superficie rugosa.

  2. Integral nuclear reactor

    International Nuclear Information System (INIS)

    The invention deals with an inprovement of the design of an integral pressurized water nuclear reactor. A typical embodyment of the invention includes a generally cylindrical pressure vessel that is assembled from three segments which are bolted together at transverse joints to form a pressure tight unit that encloses the steam generator and the reactor. The new construction permits primary to secondary coolant heat exchange and improved control rod drive mecanisms which can be exposed for full service access during reactor core refueling, maintenance and inspection

  3. Microfluidic electrochemical reactors

    Science.gov (United States)

    Nuzzo, Ralph G.; Mitrovski, Svetlana M.

    2011-03-22

    A microfluidic electrochemical reactor includes an electrode and one or more microfluidic channels on the electrode, where the microfluidic channels are covered with a membrane containing a gas permeable polymer. The distance between the electrode and the membrane is less than 500 micrometers. The microfluidic electrochemical reactor can provide for increased reaction rates in electrochemical reactions using a gaseous reactant, as compared to conventional electrochemical cells. Microfluidic electrochemical reactors can be incorporated into devices for applications such as fuel cells, electrochemical analysis, microfluidic actuation, pH gradient formation.

  4. Licensed operating reactors

    International Nuclear Information System (INIS)

    The Operating Units Status Report --- Licensed Operating Reactors provides data on the operation of nuclear units as timely and accurately as possible. This information is collected by the Office of Information Resources Management from the Headquarters staff on NRC's Office of Enforcement (OE), from NRC's Regional Offices, and from utilities. The three sections of the report are: monthly highlights and statistics for commercial operating units, and errata from previously reported data; a compilation of detailed information on each unit, provided by NRC's Regional Offices, OE Headquarters and the utilities; and an appendix for miscellaneous information such as spent fuel storage capability, reactor-years of experience and non- power reactors in the US

  5. First Algerian research reactor

    International Nuclear Information System (INIS)

    In 1985, both the Algerian Commissariat of New Energies and the Argentine National Atomic Energy Commission plus the firm INVAP S.E., started a series of mutual visits aimed at defining the mechanisms for cooperation in the nuclear field. Within this framework, a commercial contract was undersigned covering the supply of a low-power reactor (RUN), designed for basic and applied research in the fields of reactor physics and nuclear engineering. The reactor may also be used for performing experiences with neutron beams, for the irradiation of several materials and for the training of technicians, scientists and operators

  6. Course on reactor physics

    International Nuclear Information System (INIS)

    In Germany only few students graduate in nuclear technology, therefore the NPP operating companies are forced to develop their own education and training concepts. AREVA NP has started together with the Technical University of Dresden a one-week course ''reactor physics'' that includes the know-how of the nuclear power plant construction company. The Technical University of Dresden has the training reactor AKR-2 that is retrofitted by modern digital instrumentation and control technology that allows the practical training of reactor control.

  7. Fast Breeder Reactor studies

    International Nuclear Information System (INIS)

    This report is a compilation of Fast Breeder Reactor (FBR) resource documents prepared to provide the technical basis for the US contribution to the International Nuclear Fuel Cycle Evaluation. The eight separate parts deal with the alternative fast breeder reactor fuel cycles in terms of energy demand, resource base, technical potential and current status, safety, proliferation resistance, deployment, and nuclear safeguards. An Annex compares the cost of decommissioning light-water and fast breeder reactors. Separate abstracts are included for each of the parts

  8. Nuclear reactor theory

    International Nuclear Information System (INIS)

    This textbook is composed of two parts. Part 1 'Elements of Nuclear Reactor Theory' is composed of only elements but the main resource for the lecture of nuclear reactor theory, and should be studied as common knowledge. Much space is therefore devoted to the history of nuclear energy production and to nuclear physics, and the material focuses on the principles of energy production in nuclear reactors. However, considering the heavy workload of students, these subjects are presented concisely, allowing students to read quickly through this textbook. (J.P.N.)

  9. PWR type reactor

    International Nuclear Information System (INIS)

    From a PWR with a primary circuit, consisting of a reactor pressure vessel, a steam generator and a reactor coolant pump, hot coolant is removed by means of an auxiliary system containing h.p. pumps for feeding water into the primary circuit and being connected with a pipe, originating at the upper part, which has got at least one isolating value. This is done by opening an outlet in a part of the auxiliary system that has got a lower pressure than the reactor vessel. Preferably a water jet pump is used for mixing with the water of the auxiliary system. (orig.)

  10. Fusion Reactor Materials

    International Nuclear Information System (INIS)

    The objective of SCK-CEN's programme on fusion reactor materials is to contribute to the knowledge on the behaviour of fusion reactor materials and components during and after irradiation. Ongoing projects include: the study of the mechanical behaviour of structural materials under neutron irradiation; the investigation of the characteristics of irradiated first wall material such as beryllium; the detection of abrupt electrical degradation of insulating ceramics under high temperature and neutron irradiation; and the study of dismantling and waste disposal strategy for fusion reactors. Progress and achievements in these areas in 2000 are discussed

  11. International tokamak reactor

    International Nuclear Information System (INIS)

    Since 1978, the US, the European Communities, Japan, and the Soviet Union have collaborated on the definition, conceptual design, data base assessment, and analysis of critical technical issues for a tokamak engineering test reactor, called the International Tokamak Reactor (INTOR). During 1985-1986, this activity has been expanded in scope to include evaluation of concept innovations that could significantly improve the tokamak as a commercial reactor. The purposes of this paper are to summarize the present INTOR design concept and to summarize the work on concept innovations

  12. Joyo experimental reactor tour

    International Nuclear Information System (INIS)

    JAEA cooperation in remote monitoring focuses on the Joyo Experimental Reactor at the O'arai Research and Development Center. Joyo performs irradiation of test fuels to support development of the fast reactor cycle in Japan, both in international cooperation and in support of the Monju fast reactor, which is now undergoing reconstruction. The tour included an introduction at the model, a visit to the control room, entry into the containment vessel, and viewing of remote monitoring equipment in the Fresh Fuel Storage and at one of the Spent Fuel Ponds. (author)

  13. Fast Breeder Reactor studies

    Energy Technology Data Exchange (ETDEWEB)

    Till, C.E.; Chang, Y.I.; Kittel, J.H.; Fauske, H.K.; Lineberry, M.J.; Stevenson, M.G.; Amundson, P.I.; Dance, K.D.

    1980-07-01

    This report is a compilation of Fast Breeder Reactor (FBR) resource documents prepared to provide the technical basis for the US contribution to the International Nuclear Fuel Cycle Evaluation. The eight separate parts deal with the alternative fast breeder reactor fuel cycles in terms of energy demand, resource base, technical potential and current status, safety, proliferation resistance, deployment, and nuclear safeguards. An Annex compares the cost of decommissioning light-water and fast breeder reactors. Separate abstracts are included for each of the parts.

  14. nuclear reactor design calculations

    International Nuclear Information System (INIS)

    In this work , the sensitivity of different reactor calculation methods, and the effect of different assumptions and/or approximation are evaluated . A new concept named error map is developed to determine the relative importance of different factors affecting the accuracy of calculations. To achieve this goal a generalized, multigroup, multi dimension code UAR-DEPLETION is developed to calculate the spatial distribution of neutron flux, effective multiplication factor and the spatial composition of a reactor core for a period of time and for specified reactor operating conditions. The code also investigates the fuel management strategies and policies for the entire fuel cycle to meet the constraints of material and operating limitations

  15. Nuclear reactor internal structures

    International Nuclear Information System (INIS)

    The upper internal structures of the reactor are connected to the closing head so as to be readily removed with the latter and a skirt connected to the lower portion of said upper structures so as to surround the latter, extends under the control rods when they are removed from the reactor core. Through such an arrangement the skirt protects the control rods and supports the vessel closing-head and the core upper structures, whenever the head is severed from the vessel and put beside the latter in order to discharge the reactor

  16. Reactor monitoring system

    International Nuclear Information System (INIS)

    The present invention concerns a device for monitoring the inside of an FBR type reactor which can not be monitored by a usual optical camera. An ultrasonic camera having an excellent propagating property in a liquid metal sodium is scanned, and reflected waves of the ultrasonic waves are received as signals. The signals are processed by using a virtual realistic feeling (VR) technique such as a head mounting type image display (HMD) and a three dimensional pointing device. With such procedures, the inside of the FBR type reactor can be observed with such a realistic feeling that the inside of the FBR type reactor were seen directly. (I.S.)

  17. Research reactor support

    International Nuclear Information System (INIS)

    Research reactors (RRs) have been used in a wide range of applications including nuclear power development, basic physics research, education and training, medical isotope production, geology, industry and other fields. However, many research reactors are fuelled with High Enriched Uranium (HEU), are underutilized and aging, and have significant quantities of spent fuel. HEU inventories (fresh and spent) pose security risks Unavailability of a high-density-reprocessable fuel hinders conversion and limits back-end options and represents a survival dilemma for many RRs. Improvement of interim spent fuel storage is required at some RRs. Many RRs are under-utilized and/or inadequately funded and need to find users for their services, or permanently shut down and eventually decommission. Reluctance to decommission affect both cost and safety (loss of experienced staff ) and many shut down but not decommissioned RR with fresh and/or spent fuel at the sites invoke serious concern. The IAEA's research reactor support helps to ensure that research reactors can be operated efficiently with fuels and targets of lower proliferation and security concern and that operators have appropriate technology and options to manage RR fuel cycle issues, especially on long term interim storage of spent research reactor fuel. Availability of a high-density-reprocessable fuel would expand and improve back end options. The International Atomic Energy Agency provides assistance to Member States to convert research reactors from High Enriched Uranium fuel and targets (for medical isotope production) to qualified Low Enriched Uranium fuel and targets while maintaining reactor performance levels. The assistance includes provision of handbooks and training in the performance of core conversion studies, advice for the procurement of LEU fuel, and expert services for LEU fuel acceptance. The IAEA further provides technical and administrative support for countries considering repatriation of its

  18. Study of power reactor dynamics by stochastic reactor oscillator method

    International Nuclear Information System (INIS)

    Stochastic reactor oscillator and cross correlation method were used for determining reactor dynamics characteristics. Experimental equipment, fast reactor oscillator (BOR-1) was activated by random pulses from the GBS-16 generator. Tape recorder AMPEX-SF-300 and data acquisition tool registered reactor response to perturbations having different frequencies. Reactor response and activation signals were cross correlated by digital computer for different positions of stochastic oscillator and ionization chamber

  19. Nuclear reactor fuel elements

    International Nuclear Information System (INIS)

    An improved nuclear power reactor fuel element is described which consists of fuel rods, rod guide tubes and an end plate. The system allows direct access to an end of each fuel rod for inspection purposes. (U.K.)

  20. Reactor power control device

    International Nuclear Information System (INIS)

    The present invention concerns a method of controlling reactor power to shift it into a partial power operation upon occurrence of recycling pump tripping or loss of generator load. Operation state of a reactor is classified into a plurality of operation states based on values of the reactor core flow rate and the reactor power. Different insertion patterns for selected control rods are determined on every classified operation states. Then, an insertion pattern corresponding to the operation state upon occurrence of recycling pump tripping or loss of power generator load is carried out to shift into partial power operation. The operation is shifted to a load operation solely in the station while avoiding risks such as TPM scram. Then neutron fluxes are suppressed upon transient to increase margin of fuel integrity. Selected control rod pattern of the optimum reactivity is set to each of operation regions, thereby enabling to conduct flexible countermeasure so as to attain optimum operationability. (N.H.)

  1. Reactor pressure boundary materials

    International Nuclear Information System (INIS)

    With a long-term operation of nuclear power plants, the component materials are degraded under severe reactor conditions such as neutron irradiation, high temperature, high pressure and corrosive environment. It is necessary to establish the reliable and practical technologies for improving and developing the component materials and for evaluating the mechanical properties. Especially, it is very important to investigate the technologies for reactor pressure boundary materials such as reactor vessel and pipings in accordance with their critical roles. Therefore, this study was focused on developing and advancing the microstructural/micro-mechanical evaluation technologies, and on evaluating the neutron irradiation characteristics and radiation effects analysis technology of the reactor pressure boundary materials, and also on establishing a basis of nuclear material property database

  2. Reactor BR2. Introduction

    Energy Technology Data Exchange (ETDEWEB)

    Gubel, P

    2001-04-01

    The BR2 is a materials testing reactor and is still one of SCK-CEN's important nuclear facilities. After an extensive refurbishment to compensate for the ageing of the installation, the reactor was restarted in April 1997. During the last three years, the availability of the installation was maintained at an average level of 97.6 percent. In the year 2000, the reactor was operated for a total of 104 days at a mean power of 56 MW. In 2000, most irradiation experiments were performed in the CALLISTO PWR loop. The report describes irradiations achieved or under preparation in 2000, including the development of advanced facilities and concept studies for new programmes. An overview of the scientific irradiation programmes as well as of the R and D programme of the BR2 reactor in 2000 is given.

  3. Reactor BR2. Introduction

    Energy Technology Data Exchange (ETDEWEB)

    Gubel, P

    2002-04-01

    The BR2 materials testing reactor is one of SCK-CEN's most important nuclear facilities. After an extensive refurbishment to compensate for the ageing of the installation, the reactor was restarted in April 1997. In 2001, the reactor was operated for a total of 123 days at a mean power of 59 MW in order to satisfy the irradiation conditions of the internal and external programmes using mainly the CALLISTO PWR loop. The mean consumption of fresh fuel elements was 5.26 per 1000 MWd. Main achievements in 2001 included the development of a three-dimensional full-scale model of the BR2 reactor for simulation and prediction of irradiation conditions for various experiments; the construction of the FUTURE-MT device designed for the irradiation of fuel plates under representative conditions of geometry, neutron spectrum, heat flux and thermal-hydraulic conditions and the development of in-pile instrumentation and a data acquisition system.

  4. Reactor parameter simulation system

    International Nuclear Information System (INIS)

    A reactor parameter simulation system (RPSS) has been built with the capability of analyzing any reactor signals, decomposing those signals into their deterministic and stochastic components, then reconstructing new, simulated signals that possess the same statistical and correlation structure as the original plant variables. Important uses of the RPSS are for integration with reactor simulation software to provide tools for plant control strategy development, and for safety-study investigations of scenarios that can arise involving signal faults generated from degraded sensors. A third use of the RPSS is for frequency-domain filtering of reactor process variables contaminated with serially correlated noise, which is important for our ongoing development of expert systems for sensor-operability surveillance. 5 refs., 4 figs., 3 tabs

  5. Fusion Reactor Materials

    Energy Technology Data Exchange (ETDEWEB)

    Decreton, M

    2002-04-01

    The objective of SCK-CEN's programme on fusion reactor materials is to contribute to the knowledge on the radiation-induced behaviour of fusion reactor materials and components as well as to help the international community in building the scientific and technical basis needed for the construction of the future reactor. Ongoing projects include: the study of the mechanical and chemical (corrosion) behaviour of structural materials under neutron irradiation and water coolant environment; the investigation of the characteristics of irradiated first wall material such as beryllium; investigations on the management of materials resulting from the dismantling of fusion reactors including waste disposal. Progress and achievements in these areas in 2001 are discussed.

  6. New reactor type proposed

    CERN Multimedia

    2003-01-01

    "Russian scientists at the Research Institute of Nuclear Power Engineering in Moscow are hoping to develop a new reactor that will use lead and bismuth as fuel instead of uranium and plutonium" (1/2 page).

  7. Nuclear reactor fuel assembly

    International Nuclear Information System (INIS)

    A fuel assembly construction for liquid metal cooled fast breeder reactors is described in which the sub-assemblies carry a smaller proportion of parasitic material than do conventional sub-assemblies. (U.K.)

  8. Ageing of research reactors

    International Nuclear Information System (INIS)

    Historically, many of the research institutions were centred on a research reactor facility as main technological asset and major source of neutrons for research. Important achievements were made in time in these research institutions for development of nuclear materials technology and nuclear safety for nuclear energy. At present, ageing of nuclear research facilities among these research reactors and ageing of staff are considerable factors of reduction of competence in research centres. The safe way of mitigation of this trend deals with ageing management by so called, for power reactors, Plant Life Management and new investments in staff as investments in research, or in future resources of competence. A programmatic approach of ageing of research reactors in correlation with their actual and future utilisation, will be used as a basis for safety evaluation and future spending. (author)

  9. Experience with Kamini reactor

    International Nuclear Information System (INIS)

    Kamini is a 233U fuelled, 30 kW(th) research reactor. It is one of the best neutron source facility with a core average flux of 1012 n/cm2/s in IGCAR used for neutron radiography of active and nonradioactive objects, activation analysis and radiation physics research. The core consists of nine plate type fuel elements with a total fuel inventory of 590 g of 233U. Two safety control plates made of cadmium are used for start up and shutdown of the reactor. Three beam tubes, two-thimble irradiation site outside reflector and one irradiation site nearer to the core constitute the testing facilities of Kamini. Kamini attained first criticality on 29th October 96 and nominal power of 30 kW in September 1997. This paper covers the design features of the reactor, irradiation facilities and their utilities and operating experience of the reactor. (author)

  10. Dossier: research reactors

    International Nuclear Information System (INIS)

    Research reactors are used at the CEA (the French atomic energy commission) since many years. Their number has been reduced but they remain unique tools that CEA valorize continuously. The results of the programs involving such reactors are of prime importance for the operation of Electricite de France (EdF) park of existing power plants but also for the design of future nuclear power plants and future research reactors. This dossier presents three examples of research reactors in use at the CEA: Osiris and Orphee (CEA-Saclay), devoted to nuclear energy and fundamental research, respectively, and the critical mockups Eole, Minerve and Masurca (CEA-Cadarache) devoted to nuclear data libraries and neutronic calculation. (J.S.)

  11. Reactor vessel sealing plug

    International Nuclear Information System (INIS)

    This invention relates to an apparatus and method for sealing the cold leg nozzles of a nuclear reactor pressure vessel from a remote location during maintenance and inspection of associated steam generators and pumps while the pressure vessel and refueling canal are filled with water. The apparatus includes a sealing plug for mechanically sealing the cold leg nozzle from the inside of a reactor pressure vessel. The sealing plugs include a primary and a secondary O-ring. An installation tool is suspended within the reactor vessel and carries the sealing plug. The tool telescopes to insert the sealing plug within the cold leg nozzle, and to subsequently remove the plug. Hydraulic means are used to activate the sealing plug, and support means serve to suspend the installation tool within the reactor vessel during installation and removal of the sealing plug

  12. Future Reactor Experiments

    CERN Document Server

    He, Miao

    2013-01-01

    The measurement of the neutrino mixing angle $\\theta_{13}$ opens a gateway for the next generation experiments to measure the neutrino mass hierarchy and the leptonic CP-violating phase. Future reactor experiments will focus on mass hierarchy determination and the precision measurement of mixing parameters. Mass hierarchy can be determined from the disappearance of reactor electron antineutrinos based on the interference effect of two separated oscillation modes. Relative and absolute measurement techniques have been explored. A proposed experiment JUNO, with a 20 kton liquid scintillator detector of $3%/$$\\sqrt{E(MeV)}$ energy resolution, $\\sim$ 53 km far from reactors of $\\sim$ 36 GW total thermal power, can reach to a sensitivity of $\\Delta\\chi^{2}>16$ considering the spread of reactor cores and uncertainties of the detector response. Three of mixing parameters are expected to be measured to better than 1% precision. There are multiple detector options for JUNO under investigation. The technical challenges...

  13. Reactor hot spot analysis

    Energy Technology Data Exchange (ETDEWEB)

    Vilim, R.B.

    1985-08-01

    The principle methods for performing reactor hot spot analysis are reviewed and examined for potential use in the Applied Physics Division. The semistatistical horizontal method is recommended for future work and is now available as an option in the SE2-ANL core thermal hydraulic code. The semistatistical horizontal method is applied to a small LMR to illustrate the calculation of cladding midwall and fuel centerline hot spot temperatures. The example includes a listing of uncertainties, estimates for their magnitudes, computation of hot spot subfactor values and calculation of two sigma temperatures. A review of the uncertainties that affect liquid metal fast reactors is also presented. It was found that hot spot subfactor magnitudes are strongly dependent on the reactor design and therefore reactor specific details must be carefully studied. 13 refs., 1 fig., 5 tabs.

  14. Reactor BR2. Introduction

    International Nuclear Information System (INIS)

    The BR2 is a materials testing reactor and is still one of SCK-CEN's important nuclear facilities. After an extensive refurbishment to compensate for the ageing of the installation, the reactor was restarted in April 1997. During the last three years, the availability of the installation was maintained at an average level of 97.6 percent. In the year 2000, the reactor was operated for a total of 104 days at a mean power of 56 MW. In 2000, most irradiation experiments were performed in the CALLISTO PWR loop. The report describes irradiations achieved or under preparation in 2000, including the development of advanced facilities and concept studies for new programmes. An overview of the scientific irradiation programmes as well as of the R and D programme of the BR2 reactor in 2000 is given

  15. Research Reactor Benchmarks

    International Nuclear Information System (INIS)

    A criticality benchmark experiment performed at the Jozef Stefan Institute TRIGA Mark II research reactor is described. This experiment and its evaluation are given as examples of benchmark experiments at research reactors. For this reason the differences and possible problems compared to other benchmark experiments are particularly emphasized. General guidelines for performing criticality benchmarks in research reactors are given. The criticality benchmark experiment was performed in a normal operating reactor core using commercially available fresh 20% enriched fuel elements containing 12 wt% uranium in uranium-zirconium hydride fuel material. Experimental conditions to minimize experimental errors and to enhance computer modeling accuracy are described. Uncertainties in multiplication factor due to fuel composition and geometry data are analyzed by sensitivity analysis. The simplifications in the benchmark model compared to the actual geometry are evaluated. Sample benchmark calculations with the MCNP and KENO Monte Carlo codes are given

  16. Nuclear reactor (1960)

    International Nuclear Information System (INIS)

    The first French plutonium-making reactors G1, G2 and G3 built at Marcoule research center are linked to a power plant. The G1 electrical output does not offset the energy needed for operating this reactor. On the contrary, reactors G2 and G3 will each generate a net power of 25 to 30 MW, which will go into the EDF grid. This power is relatively small, but the information obtained from operation is great and will be helpful for starting up the power reactor EDF1, EDF2 and EDF3. The paper describes how, previous to any starting-up operation, the tests performed, especially those concerned with the power plant and the pressure vessel, have helped to bring the commissioning date closer. (author)

  17. Reactor Neutrino Spectra

    CERN Document Server

    Hayes, A C

    2016-01-01

    We present a review of the antineutrino spectra emitted from reactors. Knowledge of these and their associated uncertainties are crucial for neutrino oscillation studies. The spectra used to-date have been determined by either conversion of measured electron spectra to antineutrino spectra or by summing over all of the thousands of transitions that makeup the spectra using modern databases as input. The uncertainties in the subdominant corrections to beta-decay plague both methods, and we provide estimates of these uncertainties. Improving on current knowledge of the antineutrino spectra from reactors will require new experiments. Such experiments would also address the so-called reactor neutrino anomaly and the possible origin of the shoulder observed in the antineutrino spectra measured in recent high-statistics reactor neutrino experiments.

  18. Pulsed fusion reactors

    International Nuclear Information System (INIS)

    This summer school specialized in examining specific fusion center systems. Papers on scientific feasibility are first presented: confinement of high-beta plasma, liners, plasma focus, compression and heating and the use of high power electron beams for thermonuclear reactors. As for technological feasibility, lectures were on the theta-pinch toroidal reactors, toroidal diffuse pinch, electrical engineering problems in pulsed magnetically confined reactors, neutral gas layer for heat removal, the conceptual design of a series of laser fusion power plants with ''Saturn'', implosion experiments and the problem of the targets, the high brightness lasers for plasma generation, and topping and bottoming cycles. Some problems common to pulsed reactors were examined: energy storage and transfer, thermomechanical and erosion effects in the first wall and blanket, the problems of tritium production, radiation damage and neutron activation in blankets, and the magnetic and inertial confinement

  19. Reactor fueling of BWR type reactors

    International Nuclear Information System (INIS)

    Purpose: To enable the pattern exchange for control rods during burning in Control Cell Core type BWR reactors. Constitution: A plurality of control cells are divided into a plurality of groups such that the control cells is aparted from each other by way of at least two fuel assemblies other than the control cells with respect to the vertical and lateral directions of the reactor core cross section, as well as they are in adjacent with control cells of other groups with respect to the orthogonal direction. This enables to perform the pattern exchange for the control rods during burning in the control cell core with ease, and the control blade and the story effect harmful to the mechanical soundness of fuels can thus be suppressed. (Moriyama, K.)

  20. Evaluation of high temperature gas cooled reactor performance: Benchmark analysis related to initial testing of the HTTR and HTR-10

    International Nuclear Information System (INIS)

    's High Temperature Test Module (HTR-10), and Russia's ASTRA critical assembly. Selected codes and models associated with the Gas Turbine Modular Helium Reactor (GT-MHR) and Pebble Bed Modular Reactor (PBMR) plant designs are also investigated within the scope of this CRP. The objectives of this CRP include: Validation of analytical codes and performance models to actual operating conditions of HTGRs; Formulation of research and development code-to-experiment benchmark activities for inclusion into the test programmes for the HTTR, the HTR-10 and the ASTRA facilities; Investigation of analytical codes and models associated with future HTGR gas turbine plants utilizing code-to-code benchmark problems, and Demonstration of HTGR safety characteristics. Overall, this TECDOC addresses performance based HTGR code and model verification during startup, steady state and transient operational conditions of the HTR-10 and HTTR test facilities are being evaluated. Also included within the scope of this CRP is the utilization of national research facilities and computer models to investigate the areas of core physics, safety characteristics of the HTGR, fission product release and transportation behaviour, thermal hydraulics, control response and high temperature component performance. This TECDOC documents the benchmark problem results obtained by Chief Scientific Investigators (CSIs) from China, France, Germany, Indonesia, Japan, the Netherlands, Russia, South Africa, Turkey and the United States for the following areas: Reactor physics benchmark analysis of the HTTR including initial criticality, control rod worth, excess reactivity, scram reactivity and temperature coefficient of reactivity; Reactor physics benchmark analysis of the HTR-10 including initial criticality; temperature coefficient of reactivity and control rod (including differential) worth; Selected thermal hydraulic benchmark analysis for the HTTR including vessel cooling and loss of off-site electric power. The

  1. Reactor Engineering Division annual report

    International Nuclear Information System (INIS)

    Research activities in fiscal 1974 in Reactor Engineering Division of eight laboratories and computing center are described. Works in the division are closely related with the development of a multi-purpose High-temperature Gas Cooled Reactor, the development of a Liquid Metal Fast Breeder Reactor in Power Reactor and Nuclear Fuel Development Corporation, and engineering of thermonuclear fusion reactors. They cover nuclear data and group constants, theoretical method and code development, integral experiment and analysis, shielding, heat transfer and fluid dynamics, reactor and nuclear instrumentation, dynamics analysis and control method development, fusion reactor technology and aspects of the computing center. (auth.)

  2. Special lecture on nuclear reactor

    International Nuclear Information System (INIS)

    This book gives a special lecture on nuclear reactor, which is divided into two parts. The first part has explanation on nuclear design of nuclear reactor and analysis of core with theories of integral transports, diffusion Nodal, transports Nodal and Monte Carlo skill parallel computer and nuclear calculation and speciality of transmutation reactor. The second part deals with speciality of nuclear reactor and control with nonlinear stabilization of nuclear reactor, nonlinear control of nuclear reactor, neural network and control of nuclear reactor, control theory of observer and analysis method of Adomian.

  3. The replacement research reactor

    International Nuclear Information System (INIS)

    The contract for the design, construction and commissioning of the Replacement Research Reactor was signed in July 2000. This was followed by the completion of the detailed design and an application for a construction licence was made in May 2001. This paper will describe the main elements of the design and their relation to the proposed applications of the reactor. The future stages in the project leading to full operation are also described

  4. OECD Halden reactor project

    International Nuclear Information System (INIS)

    This report summarizes the activities of the OECD Halden Reactor Project for the year 1976. The main items reported on are: a) the process supervision and control which have focused on core monitoring and control, and operator-process communication; b) the fuel performance and safety behavior which have provided data and analytical descriptions of the thermal, mechanical and chemical behavior of fuel under various operating conditions; c) the reactor operations and d) the administration and finance

  5. Nuclear reactor fuel elements

    International Nuclear Information System (INIS)

    A nuclear reactor fuel element comprising a column of vibration compacted fuel which is retained in consolidated condition by a thimble shaped plug. The plug is wedged into gripping engagement with the wall of the sheath by a wedge. The wedge material has a lower coefficient of expansion than the sheath material so that at reactor operating temperature the retainer can relax sufficient to accommodate thermal expansion of the column of fuel. (author)

  6. Small reactor return

    International Nuclear Information System (INIS)

    Current state of the development of present-day small reactors in different countries is performed. Various designs of low and middle power reactors, among which are CAREM (25 MW, PWR), KLT-40 (40 MW, PWR), MRX (30 MW, PWR), IRIS (50 MW, PWR), SMART (1000 MW, PWR), Modular SBWR (50 MW, BWR), PBMR (120 MW, HTGR), GT-HMR (285 MW, HTGR), are discussed

  7. Reactor lattice transport calculations

    International Nuclear Information System (INIS)

    The present lecture is a continuation of the lecture on Introduction to the Neutron Transport Phenomena. It comprises three aspects of lattice calculations. First the idea of a reactor lattice is introduced. Then the main definitions used in reactor lattice analysis are given, and finally two basic methods applied for solution of the transport equations are defined. Several remarks on secondary results from lattice transport calculations are added. (author)

  8. Thermal or epithermal reactor

    International Nuclear Information System (INIS)

    In a thermal or epithermal heavy-water reactor of the pressure tube design the reactivity is to be increased by different means: replacement of the moderator by additional rods with heavy metal in the core or in the reflector; separation of the moderator (heavy water) from the coolant (light water) by means of shroud tubes. In light-water reactor types neutron losses are to be influenced by using the heavy elements in different configurations. (orig./PW)

  9. Future reactor experiments

    International Nuclear Information System (INIS)

    The non-zero neutrino mixing angle θ13 has been discovered and precisely measured by the current generation short-baseline reactor neutrino experiments. It opens the gate of measuring the leptonic CP-violating phase and enables the neutrino mass ordering. The JUNO and RENO-50 proposals aim at resolving the neutrino mass ordering using reactors. The experiment design, physics sensitivity, technical challenges as well as the progresses of those two proposed experiments are reviewed in this paper

  10. Water cooled nuclear reactor

    International Nuclear Information System (INIS)

    The description is given of a water cooled nuclear reactor comprising a core, cooling water that rises through the core, vertical guide tubes located inside the core and control rods vertically mobile in the guide tubes. In this reactor the cooling water is divided into a first part introduced at the bottom end of the core and rising through it and a second part introduced at the top end of the guide tubes so as to drop in them

  11. Jet-Stirred Reactors

    OpenAIRE

    Herbinet, Olivier; Guillaume, Dayma

    2013-01-01

    The jet-stirred reactor is a type of ideal continuously stirred-tank reactor which is well suited for gas phase kinetic studies. It is mainly used to study the oxidation and the pyrolysis of hydrocarbon and oxygenated fuels. These studies consist in recording the evolution of the conversion of the reactants and of the mole fractions of reaction products as a function of different parameters such as reaction temperature, residence time, pressure and composition of the inlet gas. Gas chromatogr...

  12. Generation IV reactors: economics

    International Nuclear Information System (INIS)

    The operating nuclear reactors were built over a short period: no more than 10 years and today their average age rounds 18 years. EDF (French electricity company) plans to renew its reactor park over a far longer period : 30 years from 2020 to 2050. According to EDF this objective implies 3 constraints: 1) a service life of 50 to 60 years for a significant part of the present operating reactors, 2) to be ready to built a generation 3+ unit in 2020 which infers the third constraint: 3) to launch the construction of an EPR (European pressurized reactor) prototype as soon as possible in order to have it operating in 2010. In this scheme, generation 4 reactor will benefit the feedback experience of generation 3 and will take over in 2030. Economic analysis is an important tool that has been used by the generation 4 international forum to select the likely future reactor systems. This analysis is based on 4 independent criteria: the basic construction cost, the construction time, the operation and maintenance costs and the fuel cycle cost. This analysis leads to the evaluation of the global cost of electricity generation and of the total investment required for each of the reactor system. The former defines the economic competitiveness in a de-regulated energy market while the latter is linked to the financial risk taken by the investor. It appears, within the limits of the assumptions and models used, that generation 4 reactors will be characterized by a better competitiveness and an equivalent financial risk when compared with the previous generation. (A.C.)

  13. Future reactor experiments

    Science.gov (United States)

    Wen, Liangjian

    2015-07-01

    The non-zero neutrino mixing angle θ13 has been discovered and precisely measured by the current generation short-baseline reactor neutrino experiments. It opens the gate of measuring the leptonic CP-violating phase and enables the neutrino mass ordering. The JUNO and RENO-50 proposals aim at resolving the neutrino mass ordering using reactors. The experiment design, physics sensitivity, technical challenges as well as the progresses of those two proposed experiments are reviewed in this paper.

  14. Department of Reactor Technology

    DEFF Research Database (Denmark)

    Risø National Laboratory, Roskilde

    The general development of the Department of Reactor Technology at Risø during 1981 is presented, and the activities within the major subject fields are described in some detail. Lists of staff, publications, and computer programs are included.......The general development of the Department of Reactor Technology at Risø during 1981 is presented, and the activities within the major subject fields are described in some detail. Lists of staff, publications, and computer programs are included....

  15. AVR reactor physics

    International Nuclear Information System (INIS)

    A process for reactivity control was developed and used for fuelling the AVR reactor core, which is largely based on experimentally determined values. By adding fuel elements with different quantities of heavy metals paired with various experimental requirements, great demands were made of reactivity control. Although only a small range of control was available, this was sufficient to operate the reactor and to shut it down safely in the required power and temperature range. (orig.)

  16. Moon base reactor system

    Science.gov (United States)

    Chavez, H.; Flores, J.; Nguyen, M.; Carsen, K.

    1989-01-01

    The objective of our reactor design is to supply a lunar-based research facility with 20 MW(e). The fundamental layout of this lunar-based system includes the reactor, power conversion devices, and a radiator. The additional aim of this reactor is a longevity of 12 to 15 years. The reactor is a liquid metal fast breeder that has a breeding ratio very close to 1.0. The geometry of the core is cylindrical. The metallic fuel rods are of beryllium oxide enriched with varying degrees of uranium, with a beryllium core reflector. The liquid metal coolant chosen was natural lithium. After the liquid metal coolant leaves the reactor, it goes directly into the power conversion devices. The power conversion devices are Stirling engines. The heated coolant acts as a hot reservoir to the device. It then enters the radiator to be cooled and reenters the Stirling engine acting as a cold reservoir. The engines' operating fluid is helium, a highly conductive gas. These Stirling engines are hermetically sealed. Although natural lithium produces a lower breeding ratio, it does have a larger temperature range than sodium. It is also corrosive to steel. This is why the container material must be carefully chosen. One option is to use an expensive alloy of cerbium and zirconium. The radiator must be made of a highly conductive material whose melting point temperature is not exceeded in the reactor and whose structural strength can withstand meteor showers.

  17. BWR type nuclear reactor

    International Nuclear Information System (INIS)

    Purpose: To simplify the structure of an emergency core cooling system while suppressing the flow out of coolants upon rapture accidents in a coolant recycling device of BWR type reactors. Constitution: Recirculation pumps are located at a position higher than the reactor core in a pressure vessel, and the lower plenum is bisected vertically by a partition plate. Further, a gas-liquid separator is surrounded with a wall and the water level at the outer side of the wall is made higher than the water level in the inside of the wall. In this structure, coolants are introduced from the upper chamber in the lower plenum into the reactor core, and the steams generated in the reactor core are separated in the gas-liquid separator, whereby the separated liquid is introduced as coolants by way of the inner chamber into the lower chamber of the lower plenum and further sent by way of the outer chamber into the reactor core. Consequently, idle rotation of the recycling pumps due to the flow-in of saturated water is prevented and loss of coolants in the reactor core can also be prevented upon raptures in the pipeway and the driving section of the pump connected to the pressure vessel and in the bottom of the pressure vessel. (Horiuchi, T.)

  18. Emergency reactor scram system

    International Nuclear Information System (INIS)

    The present invention provides an emergency reactor scram system capable of shut down a reactor safely upon occurrence of pump trip by improving a passive scram performance for an FBR-type reactor. Namely, a driving motor and an electric generator are connected to a main pump of a primary system. An AC/DC convertor is connected to the electric generator. A shielding plug is disposed to the upper end opening of a reactor container, a control rod drive mechanism is erected on the shielding plug, and an extension pipe is attached to scram magnets of the control rod drive mechanism. The extension pipe is connected to a control rod. The rotation of the shaft of the pump is used as a direct rotator to provide an integrated-type electric generator. The electric generator is electrically connected with the power source of a scram magnet of the emergency scram system. Accordingly, the control rod of the emergency scram system is automatically and rapidly inserted to the reactor core using the power source of the electric generator upon trip of the main pump thereby enabling to scram the reactor safely. (I.S.)

  19. A modular reactor plant

    International Nuclear Information System (INIS)

    This paper describes a new concept in liquid metal reactors that is being developed by General Electric under contract to the Department of Energy. This concept is called the Modular Reactor Plant. While this effort is not expected to have a near-term impact, it is directed toward three principal issues currently affecting nuclear power in the United States. First, plant costs have escalated to the point where the startup of new plants require large electric rate increases. Second, the cost of new plants coming on-line today vary by as much as a factor of three. And, third, nuclear construction times often exceed the utilities prudent planning cycle. This paper describes how General Electric's Modular Reactor Plant addreses these issues through shop fabrication and assembly, rail shipment to the site for rapid installation of nuclear components and inherent reactor protection. In addition, it is expected the modular reactor plant will reduce the current cost of development and demonstration of liquid metal reactors to an affordable level

  20. New fission reactor designs

    International Nuclear Information System (INIS)

    A number of critical challenges to the expanded or continued use of nuclear power have developed. These can be categorized as: regulatory restrictions and complications; negative public attitudes; plant complexity; plant life, operations, and maintenance; uncertain load growth, financing; waste management. Solutions to these challenges through advanced reactor design centre around four key technical responses. Passive safety systems are being introduced which use the laws of physics to provide emergency reactor coding, control and shutdown thus eliminating the possibility of human error. Modular construction promises cuts in costs and construction time by shifting the major part of component manufacture from the site to the factory. Standardization also cuts capital costs and in addition operations and repair costs and expedites reactor licensing. Improvements to the fuel cycle include improved fuel types, designs and fabrication, and the reprocessing of and recycling spent fuel back into energy production, thus extending uranium resources and offering a partial solution to the problem of waste disposal. Examples of evolutionary and advanced water-cooled reactors, modular high temperature gas-cooled reactors, and advanced liquid metal cooled fast breeder reactors which are being developed round the world are presented. (author)