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GB/T 11813-2026Helium leak testing of nuclear fuel rods for pressurized water reactors (PWR) (English PDF)

压水堆燃料棒氦质谱检漏

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 11813-2026 is the English-translated version of 压水堆燃料棒氦质谱检漏.

GB/T 11813-2026 is the Chinese standard "Helium leak testing of nuclear fuel rods for pressurized water reactors (PWR)". Its scope clause reads: This document describes a helium mass spectrometry leak detection method for the sealing performance of pressurized water reactor fuel rods (hereinafter referred to as "fuel rods").

This document applies to the sealing performance testing of fuel rods and related component control rods, combustible poison rods, secondary neutron source rods, etc., and other types...

The sealing test of similar fuel rods and related rods shall be carried out in accordance with the procedure. The contents of the following documents, through normative references within the text, constitute essential provisions of this document.

Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document. GB/T 4844 Pure Helium, High-Purity Helium and Ultra-Purity Helium HAF602 Regulations on the Qualification Management of Non-destructive Testing Personnel for Civil Nuclear Safety Equipment. Its clauses include terms and definitions; principles.

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Document preview — GB/T 11813-2026

National Standard of the People's Republic of China

ICS: 27.120
Classification: F 48
Replacing: GB/T 11813-2008

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Principle
5.Test conditions
6.Materials
7.Instruments and Equipment
8.Testing Steps
Appendix B (Normative) Minimum Detectable Leak Rate for Helium Mass Spectrometry Leak Detection Systems
Appendix C (Normative) Determination of Measurement Time
Appendix D (Normative) Determination of the Maximum Leakage Time of Fuel Rods

1 Scope

This document describes a helium mass spectrometry leak detection method for the sealing performance of pressurized water reactor fuel rods (hereinafter referred to as "fuel rods").

This document applies to the sealing performance testing of fuel rods and related component control rods, combustible poison rods, secondary neutron source rods, etc., and other types...

The sealing test of similar fuel rods and related rods shall be carried out in accordance with the procedure.

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 4844 Pure Helium, High-Purity Helium and Ultra-Purity Helium

HAF602 Regulations on the Qualification Management of Non-destructive Testing Personnel for Civil Nuclear Safety Equipment

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1

Using the helium gas used during fuel rod manufacturing as a leak indicator, the fuel rod is placed in a leak detection container and evacuated to a specified vacuum for helium mass spectrometry sealing testing.

Methods that can be detected.

3.2

The fuel rods are placed in a helium-pressurized container and filled with helium gas at a certain pressure. Helium gas then enters the container through leaks or gaps in the fuel rods before the fuel is released.

A method for testing the sealing performance of a material rod by placing it into a leak detection container, drawing it to a specified vacuum, and then performing helium mass spectrometry.

3.3

The fuel rods are placed in a leak detection container, evacuated to a specified vacuum, heated to a specified temperature inside the leak detection container, and maintained for a specified time before proceeding.

The process for testing the sealing performance of helium mass spectrometry.

3.4 Maximum leakage time

When a penetrating defect exists on the fuel rod, the leak occurs between the completion of the self-filling helium sealing weld or the completion of helium pressurization and when it can be detected by a helium mass spectrometer.

4 Principles

Based on the principles of mass spectrometry, the sealing performance of the fuel rods is determined by detecting helium leakage signals. This is based on the fuel rod design...

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Editions of GB/T 11813

Edition	Title	Revision	Status
GB/T 11813-2026	Helium leak testing of nuclear fuel rods for pressurized water reactors (PWR)	current edition	Current
GB/T 11813-2008	Helium leak testing of nuclear fuel rods for pressurized water reactors (PWR)	previous edition	In force until 1 February 2027

This page sells the current edition, GB/T 11813-2026. Earlier editions are listed for reference only.

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