This standard specifies the requirements and rules of item safety classification, seismic resistance category, code classification and quality assurance grading of pressurized water reactor nuclear power plants.
This standard is applicable to the classification for the items of pressurized water reactor nuclear power plants.
2 Normative References
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 13286 Criteria for Independence of Class 1E Equipment and Circuits in Nuclear Power Plants
GB/T 16702 Design Rules for Mechanical Components of PWR Nuclear Islands
GB/T 19001 Quality Management Systems - Requirements
HAF003 Safety Specifications for Quality Assurance of Nuclear Power Plant
HAF102 Safety Specifications for Design of Nuclear Power Plant
3 Terminologies, Definitions and Codes
3.1 Terminologies and Definitions
For the purposes of this document, the following terminologies and definitions apply.
3.1.1
Item
General term of structures, systems and components.
3.1.2
Reactor coolant pressure boundary (RCPB)
All components bearing reactor coolant pressure, including pressure vessels, piping, pumps, valves, etc., which are
a) constituent part of the reactor coolant system; or
b) the part connecting the adjacent system to the reactor coolant system, which
? is from the system pipeline to the outermost containment isolation valve (inclusive) for the system pipeline running through the containment;
? is from the system pipeline to the second normal close valve (inclusive) of the two under the state in which the reactor operates for the system pipeline not running through the containment;
? is from the safety relief system to the safety relief valve (inclusive) for the safety relief system of reactor coolant.
3.1.3
Active component
Component that relies on external inputs such as triggers, mechanical motions, or power sources to perform functions.
3.1.4
Active safety system
Safety system that relies mainly on active components (pumps, active valves, power apparatus, etc.) to perform safety functions.
3.1.5
Passive component
Component that performs functions without relying on external inputs such as triggers, mechanical motions, or power sources, for example, pressure vessels, heat exchangers, pipelines, etc.
