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Due to numerous uncertainties, the operation of commercial pressurized water reactors (PWRs) cannot strictly follow the valid model from safety analysis report. This paper takes CPR1000 as example, comparing neutron parameters between equilibrium cycles and flexible cycles under the same fuel management, and constructing extreme operation paths from these equilibrium and flexible cycles. It also studies the differences in neutron parameters under these paths to evaluate the construction methods for safety analysis boundaries. The analysis shows that considering different loading patterns in fuel management and margins can envelop the impact of power history.

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Influence of Power History for PWR Reload Analysis

  • 会议论文

  • 发表日期：

    2026年

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  • Zhuoting Shi,
  • Yuxiang Zhu,
  • Bo Liu,
  • Ruoqi Liu,
  • Jinfeng Wei,
  • Changyou Zhao,
  • Zhijun Li

摘要

Due to numerous uncertainties, the operation of commercial pressurized water reactors (PWRs) cannot strictly follow the valid model from safety analysis report. This paper takes CPR1000 as example, comparing neutron parameters between equilibrium cycles and flexible cycles under the same fuel management, and constructing extreme operation paths from these equilibrium and flexible cycles. It also studies the differences in neutron parameters under these paths to evaluate the construction methods for safety analysis boundaries. The analysis shows that considering different loading patterns in fuel management and margins can envelop the impact of power history.