Research on Severe Accident Management Guidelines for HPR1000 NPP

The Severe Accident Management Guideline (SAMG) is an integrated document for a nuclear power plant (NPP) to deal with severe accidents effectively, with the basic objective to maintain the integrity of the containment in both short term and long term as far as possible. After Fukushima Daiichi nuclear accident, insights on severe accident prevention and mitigation are put forward in the process of a newly designed nuclear power plant. Hua-long Pressurised Reactor (HPR1000) is a generation-III NPP in China, with necessary dedicated system and equipment that designed at the beginning during severe accidents, and is also planned to have associated procedures after accidents. The paper focuses on development process of SAMG for HPR1000 nuclear power plant. Firstly, the characteristics of the plant are sorted, with both dedicated equipment required for severe accident mitigation and other equipment. Then the main objective and principles in developing SAMG are defined. After that, the structure of SAMG is discussed and finally determined referred to the latest insights all over the world and also considering the good practice in China. Additionally, diagnosis process and severe accident strategy are described. In relation to this, flexible strategy in HPR1000 NPP is discussed and included in the integrated SAMG.