Equalization of energy density in boiling water reactors (as exemplified by WB-50). Development and testing of WB -50 computational model on the basis of MCU-RR code

Yu B. Chertkov, V. V. Disyuk, E. Yu Pimenov, N. V. Aksenova

Результат исследований: Материалы для журналаСтатья

Аннотация

Within the framework of research in possibility and prospects of power density equalization in boiling water reactors (as exemplified by WB-50) a work was undertaken to improve prior computational model of the WB-50 reactor implemented in MCU-RR software. Analysis of prior works showed that critical state calculations have deviation of calculated reactivity exceeding ±0.3 % (ΔKef/Kef) for minimum concentrations of boric acid in the reactor water and reaching 2 % for maximum concentration values. Axial coefficient of nonuniform burnup distribution reaches high values in the WB-50 reactor. Thus, the computational model needed refinement to take into account burnup inhomogeneity along the fuel assembly height. At this stage, computational results with mean square deviation of less than 0.7 % (ΔKef/Kef) and dispersion of design values of ±1 % (ΔK/K) shall be deemed acceptable. Further lowering of these parameters apparently requires root cause analysis of such large values and paying more attention to experimental measurement techniques.

Язык оригиналаАнглийский
Номер статьи012024
ЖурналJournal of Physics: Conference Series
Том781
Номер выпуска1
DOI
СостояниеОпубликовано - 7 фев 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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