In the design and construction of nuclear power plant,the equipment availability qualification is carried out to ensure that the equipment necessary for severe accident is capable to perform its intended safety functions under severe accident conditions.The requirements related to equipment availability qualification under severe accident proposed by the present codes and standards are studied in this paper.With consideration of the phenomena and processes of severe accidents,a set of systematic and operable methodology and requirements for the equipment availability qualification under severe accident is put forward,including the basic principles,selecting method of equipment,requirements for the environmental conditions determination,and equipment availability qualification processes,and typical example is also provided.
Nuclear power plantEquipment availability qualificationSevere accident
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