Pin Power Reconstruction Methods of the Few-Group BWR Core Simulator NEREUS

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概要

• 論文の詳細を見る

• An improved pin power reconstruction method has been incorporated in the few-group nodal BWR core simulator NEREUS, which is based on the analytic polynomial nodal method. With the analytic polynomial nodal method, accurate node surface fluxes are available, which are used later to reconstruct pin powers. The intranodal homogeneous thermal flux is corrected using a semi-empirical proportional relation between surface transition components of the homogeneous and heterogeneous fluxes. This correction method is effective for BWR calculations, especially for controlled assemblies or mixed loading of off-set assemblies. A unified model accounting for effects of spectral histories, caused by spectral interactions between fuel assemblies and the control blade insertion, was also developed for intranodal burnup correction. The change in pin powers due to the control blade history can be predicted well, without laborious assembly depletion calculations with control blade insertion. R-factors used in critical power ratio calculations are also reconstructed from the pin powers. The NEREUS pin power reconstruction method was verified against heterogeneous multi-assembly depletion calculations.

• 一般社団法人 日本原子力学会の論文
• 1999-12-25

著者

• Iwamoto Tatsuya

  Isogo Nuclear Engineering Center Toshiba Corporation

• Yamamoto Munenari

  Isogo Nuclear Engineering Center Toshiba Corporation

関連論文

• Fission Product Model for BWR Analysis with Improved Accuracy in High Burnup
• Advanced Nodal Methods of the Few-Group BWR Core Simulator NEREUS
• Pin Power Reconstruction Methods of the Few-Group BWR Core Simulator NEREUS
• An Improved One-and-a-Half Group BWR Core Simulator for a New-Generation Core Management System

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