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GB/T 25448-2010 English PDF

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GB/T 25448-2010: Helium leak testing of PHWR nuclear fuel bundles
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GB/T 25448-2010English139 Add to Cart 3 days [Need to translate] Helium leak testing of PHWR nuclear fuel bundles Valid GB/T 25448-2010

PDF similar to GB/T 25448-2010


Standard similar to GB/T 25448-2010

GB/T 10266   GB/T 11809   GB/T 25451   GB/T 25450   

Basic data

Standard ID GB/T 25448-2010 (GB/T25448-2010)
Description (Translated English) Helium leak testing of PHWR nuclear fuel bundles
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard F48
Classification of International Standard 27.120
Word Count Estimation 6,676
Date of Issue 2010-11-10
Date of Implementation 2011-05-01
Quoted Standard GB/T 12604.7
Regulation (derived from) Announcement of Newly Approved National Standards No. 8 of 2010 (total 163)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the CANDU nuclear power plant fuel bundle (referred to as " bundle ") sealing performance summary NDT methods, materials and equipment, test conditions, test procedures and test results to determine such content. This standard applies to CANDU nuclear power plant fuel bundle sealing performance testing, but also for CANDU nuclear power plant fuel elements sealing performance testing, can detect slip slaughter range vent 1 �� 10-11Pa �� m3/s ~ 1 �� 10 -7Pa �� m3/s.

GB/T 25448-2010: Helium leak testing of PHWR nuclear fuel bundles

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Helium leak testing of PHWR nuclear fuel bundles ICS 27.120 F48 National Standards of People's Republic of China CANDU nuclear power plant fuel bundle helium leak detection Issued on. 2010-11-10 2011-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard proposed by China National Nuclear Corporation. This standard by the National Standardization Technical Committee of nuclear energy. This standard was drafted. China North Nuclear Fuel Limited. The main drafters of this standard. Jing Lei, Wang Chunxia, \u200b\u200blate new country, Zhang Jie, Han Ping Shan. CANDU nuclear power plant fuel bundle helium leak detection

1 Scope

This standard specifies the CANDU nuclear power plant fuel bundle (referred to as "bundle") sealing performance summary NDT methods, materials and equipment, Test conditions, test procedures and test results determination and so on. This standard applies to detect heavy water reactor nuclear power plant fuel bundle sealing performance, but also for CANDU nuclear power plant fuel element sealing performance Detection. Detectable leak rate in the range of 1 × 10-11Pa · m3/s ~ 1 × 10-7Pa · m3/s.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 12604.7 Terminology for nondestructive testing Leak Detection

3 Terms and Definitions

GB/T 12604.7 well established in the following terms and definitions apply to this standard. 3.1 Direct leak detection method directheliumleaktesting Manufacture or use bundle element as shown when filled with helium gas leak sealing performance test method. 3.2 Back pressure leak detection method immersedheliumleaktesting Bundle or element placed in a vacuum vessel, filled a certain pressure of helium, helium gas into the interior of the bundle or element drain hole or crevice After then helium leak methods. 3.3 Maximum leakage time themaximumtimeofleaking When the bundle or the cladding tube end plugs and penetrating defects exist, since helium seal welded play helium leak detectors can detect leakage rate Sentenced to waste until the elapsed time limit.

4 Method summary

Using helium leak detectors, detector and vacuum systems, and other standard leak, sealing performance bundle or element leak test. When the vent When the leak rate is less than the floor of the system and the minimum detectable signals and for qualified, otherwise unqualified.

5 materials and equipment

5.1 helium, purity of not less than 99.995%. 5.2 Standard leak, quartz series film permeation of helium standard leak with helium chamber having a nominal leak rate no greater than 1 × 10-8Pa · m3/s. 5.3 helium leak detectors, sensitivity better than 1 × 10-11Pa · m3/s. 5.4 Composite vacuum gauge (gauge), 105Pa ~ 10-4Pa. 5.5 Leak container, the degree of vacuum of not more than 1 × 10-3Pa. 5.6 helium-filled sealed container is connected to low vacuum pumps, pressure gauges and helium source.

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