Suggestions on Optimization Method of Emergency Action Level of Advanced Passive Light Reactor

Emergency Action Level（EAL） is one important tool to determine the emergency classification level in nuclear emergency response. Because of its design characteristics, the risk spectrum characteristics of a large advanced passive light water reactor are different with that of the nuclear power plants currently in operation, and its EALs have been improved. This paper proposes a risk-informed assessment method, using the probabilistic safety assessment（PSA） model, to establish an approximate relationship between the EAL and the conditional core damage probability（CCDP）. Based on the range of emergency classification by CCDP, the EAL mismatched with the emergency classification level can be screened to achieve the adjustment and optimization.