Dosimetry of the Decommissioned High-Flux Beam Reactor at Brookhaven Lab14th International Symposium on Reactor Dosimetry on 22-27 May 2011 in Bretton Woods PDF Download
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Author: J. -P. Hu
Publisher:
ISBN:
Category : Beam plug
Languages : en
Pages : 10
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Book Description
The high-flux beam reactor (HFBR) at the Brookhaven National Laboratory was a heavy water cooled and moderated reactor that achieved criticality on Oct. 31, 1965. It operated at a power level of 40 megawatts. An equipment upgrade in 1982 allowed operations at 60 megawatts. After a 1989 reactor shutdown to reanalyze safety impact of a hypothetical loss of coolant accident, the reactor was restarted in 1991 at 30 megawatts. The HFBR was shut down in December 1996 for routine maintenance and refueling. At that time, a leak of tritiated water was identified by routine sampling of groundwater from wells located adjacent to the reactor's spent fuel pool. The reactor remained shut down for almost three years for safety and environmental reviews. In November 1999 the United States Department of Energy decided to permanently shut down the HFBR. The decontamination and decommissioning of the HFBR complex, consisting of multiple structures and systems to operate and maintain the reactor, were complete in 2009 after removing and shipping off all the control rod blades. The emptied and cleaned HFBR dome, which still contains the irradiated reactor vessel, is presently under 24/7 surveillance for safety. Detailed dosimetry performed for the HFBR decommissioning during 1996-2009 is described in the paper.
Author: J. -P. Hu
Publisher:
ISBN:
Category : Beam plug
Languages : en
Pages : 10
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Book Description
The high-flux beam reactor (HFBR) at the Brookhaven National Laboratory was a heavy water cooled and moderated reactor that achieved criticality on Oct. 31, 1965. It operated at a power level of 40 megawatts. An equipment upgrade in 1982 allowed operations at 60 megawatts. After a 1989 reactor shutdown to reanalyze safety impact of a hypothetical loss of coolant accident, the reactor was restarted in 1991 at 30 megawatts. The HFBR was shut down in December 1996 for routine maintenance and refueling. At that time, a leak of tritiated water was identified by routine sampling of groundwater from wells located adjacent to the reactor's spent fuel pool. The reactor remained shut down for almost three years for safety and environmental reviews. In November 1999 the United States Department of Energy decided to permanently shut down the HFBR. The decontamination and decommissioning of the HFBR complex, consisting of multiple structures and systems to operate and maintain the reactor, were complete in 2009 after removing and shipping off all the control rod blades. The emptied and cleaned HFBR dome, which still contains the irradiated reactor vessel, is presently under 24/7 surveillance for safety. Detailed dosimetry performed for the HFBR decommissioning during 1996-2009 is described in the paper.
Author: David W. Vehar
Publisher:
ISBN: 9780803175365
Category : Nuclear power plants
Languages : en
Pages : 762
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Book Description
Proceedings of the Fourteenth International Symposium on Reactor Dosimetry, held in Bretton Woods, New Hampshire, USA, May 22-27, 2011.
Author: Greg A. Fischer
Publisher:
ISBN:
Category : Benchmark
Languages : en
Pages : 7
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Book Description
The dosimetry from the H. B. Robinson Unit 2 Pressure Vessel Benchmark is analyzed with a suite of Westinghouse-developed codes and data libraries. The radiation transport from the reactor core to the surveillance capsule and ex-vessel locations is performed by raptor-m3g, a parallel deterministic radiation transport code that calculates high-resolution neutron flux information in three dimensions. The cross-section library used in this analysis is the ALPAN library, an Evaluated Nuclear Data File (ENDF)/B-VII.0-based library designed for reactor dosimetry and fluence analysis applications. Dosimetry is evaluated with the industry-standard snlrml reactor dosimetry cross-section data library.
Author: Jan Wagemans
Publisher: World Scientific
ISBN: 9812384480
Category : Science
Languages : en
Pages : 759
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Book Description
This book presents the state of the art in reactor dosimetry as applied to nuclear power plants and to high performance research reactors, accelerator-driven systems and spallation sources. The reader will also find the latest advances in computer code development for radiation transport and shielding. In addition, the book focuses on radiation measurement techniques.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
RADIATION DOSIMETRY MEASUREMENTS HAVE BEEN PERFORMED OVER A PERIOD OF MANY YEARS AT THE HIGH FLUX BEAM REACTOR (HFBR) AND THE MEDICAL RESEARCH REACTOR (BMRR) AT BROOKHAVEN NATIONAL LABORATORY TO PROVIDE INFORMATION ON THE ENERGY DISTRIBUTION OF THE NEUTRON FLUX, NEUTRON DOSE RATES, GAMMA-RAY FLUXES AND GAMMA-RAY DOSE RATES. THE MCNP PARTICLE TRANSPORT CODE PROVIDED MONTE CARLO RESULTS TO COMPARE WITH VARIOUS DOSIMETRY MEASUREMENTS PERFORMED AT THE EXPERIMENTAL PORTS, AT THE TREATMENT ROOMS AND IN THE THIMBLES AT BOTH HFBR AND BMRR.
Author: Eva-Lena Green
Publisher:
ISBN:
Category : Nuclear reactors
Languages : en
Pages : 9
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Book Description
The Ringhals site is situated on the Swedish southwest coastline. At the site, there are four operating nuclear power plants. Historically, the Swedish policy has been that the nuclear power plants were to be closed in 2010. The present position is to operate the units until their technical and economic lifetime has run out. The units shall be maintained and invested in to ensure a lifetime of at least 50 years, but the actions taken shall not limit the time to this date. When the initial surveillance capsules were evaluated, it was noted that the material properties of the weld material of unit 3 and 4 showed some deviations from the expected behaviour. Currently there is an extensive project running for re-evaluating the embrittlement situation from a long-term operating perspective. One part of the project is aimed at more accurately determining the fluence levels of the reactor pressure vessels (RPVs). The basis for the early evaluations of the dosimeters in the surveillance capsules and the corresponding fluence evaluation had an operating lifetime of 25 years as a target value. Therefore, the accuracy and refinement of the measurement and calculation were taken to be good enough to suit this life span. Looking back at the results from the dosimetry measurements there are a few discrepancies. Some of the dosimeters were disintegrated and some measurements had comparatively large uncertainties. When starting this project there were some re-evaluations done with the old fluence prediction model. For every new run and refinement there appeared new difficulties, and the decision was to start the evaluation from scratch.
Author: RN. Reciniello
Publisher:
ISBN:
Category : Dose rates
Languages : en
Pages : 8
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Book Description
Radiation dosimetry measurements have been performed over a period of many years at the High Flux Beam Reactor (HFBR) and the Medical Research Reactor (BMRR) at Brookhaven National Laboratory to provide information on the energy distribution of the neutron fluxes, neutron dose rates, gamma-ray fluxes and gamma-ray dose rates. The MCNP Particle Transport Code provided Monte Carlo results to compare with various dosimetry measurements performed at the experimental ports, at the treatment rooms and in the thimbles at both the HFBR and BMRR.
Author: Hamid Ait Abderrahim
Publisher: World Scientific
ISBN: 9814545317
Category :
Languages : en
Pages : 959
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Book Description
This symposium provided a forum for interchange of state-of-the-art techniques and databases and for standardization of radiation metrology.The proceedings are of value to anyone involved in reactor dosimetry, including researchers, manufacturers, and representatives from industry, utilities and regulatory agencies. The major topics treated are: reactor pressure vessel surveillance and plant life management; reactor dosimetry techniques; benchmarks; nuclear data; damage correlation and exposure parameters; experimental and calculational characterization of irradiation environments; dosimetry for research reactors and irradiation experiments.
Author: Wim Voorbraak
Publisher: World Scientific
ISBN: 9814468290
Category : Science
Languages : en
Pages : 761
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Book Description
This book gives the state of the art in the field of reactor dosimetry as applied in nuclear power plants and research reactors. Surveillance programs are presented for nuclear power plants in Europe, including Russia and Ukraine, USA, Argentina and Korea. New cross-section measurements from most of the European, American and Japanese research reactors are reported. The latest developments in computer code development for radiation transport and shielding calculations, and radiation measurement techniques are also highlighted.
Author: John G. Williams
Publisher: ASTM International
ISBN: 0803128843
Category : Nuclear power plants
Languages : en
Pages : 884
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Book Description
Comprising the proceedings of the Tenth International Symposium on Reactor Dosimetry held in Osaka, Japan in September 1999, this volume contains some 100 papers, plus three keynote speeches, arranged in seven sections that cover the technical scope of the symposium. The first two sections consist o
