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In order to solve the problem that the water filling method of primary circuit and reactor pool takes a long time at the current refueling stage of nuclear power units, based on the design criteria of nuclear power units, this paper puts forward a water filling way that can fill the primary circuit and reactor pool with a large flow rate during the refueling shutdown stage. Based on the characteristics of reactor structure, the stability analysis method of irradiated sample plug is proposed. For the first time, the whole modeling of the primary circuit and the water filling process of the reactor pool is realized based on the best estimation program. The modeling results of different water filling schemes show that the three water filling methods based on low-head safety injection are feasible and can shorten the critical path of overhaul.

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Feasibility Study on Water Filling of Primary Circuit and Reactor Cavity by Low-Head Safety Injection Pump of Nuclear Power Unit

  • 会议论文

  • 发表日期：

    2026年

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  • Wang Shu-Qiang,
  • Zhang Zhao,
  • Li Jun,
  • Xue Feng,
  • Luo Ting

摘要

In order to solve the problem that the water filling method of primary circuit and reactor pool takes a long time at the current refueling stage of nuclear power units, based on the design criteria of nuclear power units, this paper puts forward a water filling way that can fill the primary circuit and reactor pool with a large flow rate during the refueling shutdown stage. Based on the characteristics of reactor structure, the stability analysis method of irradiated sample plug is proposed. For the first time, the whole modeling of the primary circuit and the water filling process of the reactor pool is realized based on the best estimation program. The modeling results of different water filling schemes show that the three water filling methods based on low-head safety injection are feasible and can shorten the critical path of overhaul.