Qualification of safety class electrical equipment for nuclear power plants
1 Scope
This standard specifies the general requirements for qualification of safety class electrical equipment and its interfaces used in nuclear power plants, including qualification principles, methods and procedures.
This standard is applicable to initially qualifying safety class electrical equipment used in nuclear power plants, maintaining qualified condition and extending qualified life, and updating qualification, as required, if the equipment is modified. The qualification requirements in this standard, when met, demonstrate and document the ability of equipment to perform safety function(s) under applicable service conditions including design basis events, reducing the risk of common-cause failure. Other equipment to be qualified may refer to this standard.
This standard does not provide environmental stress levels and performance requirements.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 13625 Seismic qualification of electrical equipment of the safety system for nuclear power plants
NB/T 20086 Assessing, monitoring and mitigating aging effects on class 1E equipment used in nuclear power plants
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
age conditioning
exposure of sample equipment to environmental, operational, and system conditions (design basis events are not included) to simulate these conditions for a period of time, so as to degrade equipment performance to allow for design basis events simulation tests.
Note: It is revised from the definition 6.2.9 in NB/T 20063-2012.
GB/T 12727-2017 The following standards are cited：
