Nuclear Engineering and Technology

  • 제54권12호
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  • Pages.4731-4742
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  • 2022
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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The impact of fuel depletion scheme within SCALE code on the criticality of spent fuel pool with RBMK fuel assemblies

  • Andrius Slavickas (Laboratory of Nuclear Installation Safety, Lithuanian Energy Institute) ;
  • Tadas Kaliatka (Laboratory of Nuclear Installation Safety, Lithuanian Energy Institute) ;
  • Raimondas Pabarcius (Laboratory of Nuclear Installation Safety, Lithuanian Energy Institute) ;
  • Sigitas Rimkevicius (Laboratory of Nuclear Installation Safety, Lithuanian Energy Institute)
  • 투고 : 2022.05.24
  • 심사 : 2022.08.03
  • 발행 : 2022.12.25
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초록

RBMK fuel assemblies differ from other LWR FA due to a specific arrangement of the fuel rods, the low enrichment, and the used burnable absorber - erbium. Therefore, there is a challenge to adapt modeling tools, developed for other LWR types, to solve RBMK problems. A set of 10 different depletion simulation schemes were tested to estimate the impact on reactivity and spent fuel composition of possible SCALE code options for the neutron transport modelling and the use of different nuclear data libraries. The simulations were performed using cross-section libraries based on both, VII.0 and VII.1, versions of ENDF/B nuclear data, and assuming continuous energy and multigroup simulation modes, standard and user-defined Dancoff factor values, and employing deterministic and Monte Carlo methods. The criticality analysis with burn-up credit was performed for the SFP loaded with RBMK-1500 FA. Spent fuel compositions were taken from each of 10 performed depletion simulations. The criticality of SFP is found to be overestimated by up to 0.08% in simulation cases using user-defined Dancoff factors comparing the results obtained using the continuous energy library (VII.1 version of ENDF/B nuclear data). It was shown that such discrepancy is determined by the higher U-235 and Pu-239 isotopes concentrations calculated.

키워드

과제정보

The authors would like to thank the lab staff for valuable discussions and comments during preparation of this article. This study received no external funding.

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