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针对改进型三环路压水堆(CPR1000)核电厂在某些工况下可能丧失对乏燃料水池冷却功能的情况,以岭东核电厂为例,分析CPR1000换料水池和乏燃料水池冷却和处理系统(PTR)的设计基准、系统功能及缺陷,并结合技术规范的要求,提出PTR的改进措施。分析表明,CPR1000核电厂乏燃料水池冷却问题的原因是PTR设计没有充分考虑冗余性。建议从提高PTR冷却回路换热能力和降低乏燃料水池完全失去冷却风险方面进行改进。
Aiming at the situation that the CPR1000 nuclear power plant may lose the cooling function of spent fuel pool in some operating conditions, taking Lingdong NPP as an example, the CPR1000 refueling and spent fuel pool cooling and Processing system (PTR) design basis, system functions and defects, combined with the requirements of technical specifications, proposed PTR improvements. The analysis shows that the reason for the cooling problem of the spent fuel pool at the CPR1000 NPP is that the design of the PTR does not take full account of the redundancy. It is recommended that improvements be made in increasing the heat transfer capacity of the PTR cooling circuit and in reducing the risk of the spent fuel pool completely losing its cooling.