钠冷快堆征兆导向处理策略研究及验证——以丧失热阱事故为例

Research and Verification of Symptom-oriented Treatment Strategy for Sodium-cooled Fast Reactor——Take the Loss of Heat Sink as an Example

钠冷快堆是目前技术最为成熟的一种四代堆型。为确保快堆安全,需开发适用于快堆的征兆导向事故运行规程体系。该文以中国实验快堆为研究对象,采用快堆系统分析程序NUSOL-LMR进行建模,将稳态计算结果与CEFR主要设计参数对比验证模型的正确性;通过执行征兆导向的停堆导则和失去二次热阱响应导则来处理丧失热阱事故,验证快堆丧失热阱事故征兆导向处理策略的有效性,并验证停堆导则、失去二次热阱响应导则的正确性和可执行性。

The sodium-cooled fast reactor is one of the fourth-generation reactor types with the highest technology maturity.In order to meet the needs of fast reactor safety development,it is necessary to develop a symptom-oriented accident operation regulation system applicable to fast reactors.In this paper,the Chinese experimental fast reactor is taken as the research object,and the fast reactor system analysis program NUSOL-LMR is used for modeling.The results of the steady state calculation are compared with the main design parameters of CEFR to verify the correctness of the model.The shutdown guidelines and lost secondary heat sink response guidelines to deal with loss of heat sink accidents,verifying the effectiveness of the strategy for the treatment of loss of heat sink accidents in fast reactors based on symptom-oriented accident procedures.The correctness and enforceability of the shutdown guideline and the loss of the secondary heat sink response guideline are verified at the same time.