Qualification Test Standards Research of Electrical Equipment Important to Safety of Nuclear Power Plants

Safety digital I&C system has been gradually used to the new nuclear power plant I&C system or renovation project of the nuclear power plant. Nuclear equipment reliability directly affects the safety operation of nuclear power plant, so the safety digital I&C system should be carried out Equipment qualification (EQ) in accordance with the relevant regulation and standards. EQ test is effective measure to prevent the common failure caused by operating conditions and environmental conditions. And also can meet the single failure criterion of nuclear I&C equipment. Type testing is still method of choice for the safety electrical equipment. However, in terms of safety electrical EQ, multiple international standard system lack of detailed guide. This paper analyzes the required qualification standards. Combined with the international EQ experiences then put forward requirements of qualification test items, test levels and qualification process.