1 Scope
This standard specifies the design and layout requirements for the safety and relief valve piping related to the nuclear safety of PWR nuclear power plants (including active nuclear power plants and passive nuclear power plants).
It is applicable to the design of PWR nuclear power plant safety and relief valve piping. The piping is divided into the following categories:
a) piping with safety valve and relief valve for steam generators;
b) piping with safety valve and relief valve for pressure stabilizers;
c) piping with safety valve of safety level in other systems except reactor coolant system and main steam system, such as safety injection system, residual heat removal system, chemical and volume control system, equipment cooling water system, spent fuel pool cooling system, compressed air system, liquid waste treatment system and passive reactor core cooling system.
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 17569-2013 Classification for the items of pressurized water reactor nuclear power pants
NB/T 20036.6-2011 Qualification of active mechanical equipment used in nuclear power plants - Part 6: Functional qualification requirements for valve assemblies
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
piping with safety valve and relief valve
general term of the safety valve and relief valve, the upstream and downstream piping of safety valve or relief valve (or discharge pipe), and parts such as supports (including damper) of the piping
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Piping with safety valve and relief valve for steam generators
6 Piping with safety valve and relief valve for pressure stabilizers
7 Piping with safety valve of the main auxiliary system
Annex A (Informative) Calculation method of valve discharge reactive force
