Absolute determination of power density in the VVER-1000 mock-up on the LR-0 research reactor

The work presents a detailed comparison of calculated and experimentally determined net peak areas of selected fission products gamma lines. The fission products were induced during a 2.5h irradiation on the power level of 9.5W in selected fuel pins of the VVER-1000 Mock-Up. The calculations were do...

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Bibliographic Details
Published in:Applied radiation and isotopes 2013-08, Vol.78, p.38-45
Main Authors: Košt’ál, Michal, Švadlenková, Marie, Milčák, Ján
Format: Article
Language:English
Subjects:
Computer Simulation
Energy Transfer
Equipment Design
Equipment Failure Analysis
Fission products
LR-0
Models, Theoretical
Nuclear Fission
Nuclear Reactors - instrumentation
Pin power density
VVER-1000
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Summary:The work presents a detailed comparison of calculated and experimentally determined net peak areas of selected fission products gamma lines. The fission products were induced during a 2.5h irradiation on the power level of 9.5W in selected fuel pins of the VVER-1000 Mock-Up. The calculations were done with deterministic and stochastic (Monte Carlo) methods. The effects of different nuclear data libraries used for calculations are discussed as well. The Net Peak Area (NPA) may be used for the determination of fission density across the mock-up. This fission density is practically identical to power density. •Net peak area of 92Sr induced in selected VVER-1000 mock-up pins is measured.•Determination of absolute power density in VVER-1000 mock-up.•Calculations of NPA using various nuclear data.•Discrepancies between calculation and experiment for pins adjacent to baffle model.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2013.03.094