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NB/T 20268-2014Rules for the design of safety and relief valve piping of PWR nuclear power plants (English PDF)

压水堆核电厂安全阀和卸压阀管系设计准则

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

June 29, 2014

Implementation date

November 1, 2014

Scope

NB/T 20268-2014 is the English-translated version of 压水堆核电厂安全阀和卸压阀管系设计准则.

NB/T 20268-2014 is the Chinese standard "Rules for the design of safety and relief valve piping of PWR nuclear power plants".

Its scope clause reads: 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. Its clauses include terms and definitions.

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Document preview — NB/T 20268-2014

National Standard of the People's Republic of China

ICS: 27.120.20
Replacing: EJ/T 339-1988

Issued by: National Energy Administration of the People's Republic of China

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

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 […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

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Editions of NB/T 20268

Edition	Title	Revision	Status
NB/T 20268-2014	Rules for the design of safety and relief valve piping of PWR nuclear power plants	current edition	Current
EJ/T 339-1988	Rules for the design of safety and relief valve piping of PWR nuclear power plants	previous edition	Superseded

This page sells the current edition, NB/T 20268-2014. Earlier editions are listed for reference only.

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