Verification of Thermal Cooling Capacity for a Spent Fuel Pool Expansion in a 1000 MW PWR Nuclear Power Plant
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摘要: 针对国内某1000MW压水堆核电厂乏燃料水池扩容项目,使用计算流体力学(CFD)和理论分析方法,验证了扩容后的乏燃料水池热工冷却能力。在乏燃料水池至少存在一列反应堆水池和乏燃料水池冷却和处理系统(PTR)运行的冷却工况下,乏燃料水池平均水温均满足相应的验收准则,局部最高水温和燃料包壳最高温度均低于当地水的饱和温度。在2列PTR系统均失效的失去冷却工况下,计算出了乏燃料水池平均水温加热到沸腾温度的时间和燃料格架裸露的时间,为运行干预提供了指导。Abstract: In view of the capacity expansion project of a 1000 MW PWR NPP spent fuel pool, the thermal cooling capacity of the spent fuel pool after expansion is verified by using the Computational Fluid Dynamics（CFD） and theoretical analysis methods. Under the operating cooling condition of at least one of reactor pool and spent fuel pool cooling and processing system（PTR） in the spent fuel pool, the average water temperature of the spent fuel pool meets the corresponding acceptance criteria. The maximum local water temperature and the maximum temperature of the fuel cladding shell are lower than the local water saturation temperature. On the condition of lost two PTR systems, the time of heating the average water temperature to the boiling temperature and the exposure time of the fuel grid are both calculated, which provides a guidance for the operation intervention.
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Key words:
- Spent fuel pool /
- Expansion /
- Thermal cooling capacity
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