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BS EN ISO 12807:2021

BS EN ISO 12807:2021

$215.11

Safe transport of radioactive materials. Leakage testing on packages

Published By Publication Date Number of Pages
BSI 2021 94
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This document specifies gas leakage test criteria and test methods for demonstrating that packages used to transport radioactive materials comply with the package containment requirements defined in the International Atomic Energy Agency (IAEA) Regulations for the Safe Transport of Radioactive Material for:

  • design verification;

  • fabrication verification;

  • preshipment verification;

  • periodic verification;

  • maintenance verification.

This document describes a method for relating permissible activity release of the radioactive contents carried within a containment system to equivalent gas leakage rates under specified test conditions. This approach is called gas leakage test methodology. However, in this document it is recognized that other methodologies might be acceptable, provided that they demonstrate that any release of the radioactive contents will not exceed the regulatory requirements, and subject to agreement with the competent authority.

This document provides both overall and detailed guidance on the complex relationships between an equivalent gas leakage test and a permissible activity release rate. Whereas the overall guidance is universally agreed upon, the use of the detailed guidance shall be agreed upon with the competent authority during the Type B(U), Type B(M) or Type C packages certification process.

It should be noted that, for a given package, demonstration of compliance is not limited to a single methodology.

While this document does not require particular gas leakage test procedures, it does present minimum requirements for any test that is to be used. It is the responsibility of the package designer or consignor to estimate or determine the maximum permissible release rate of radioactivity to the environment and to select appropriate leakage test procedures that have adequate sensitivity.

This document pertains specifically to Type B(U), Type B(M) or Type C packages for which the regulatory containment requirements are specified explicitly.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
12 4 Symbols and units
15 5 Regulatory requirements
5.1 Relevant regulations
5.2 Regulatory containment requirements
6 Procedure for meeting the requirements of this document
6.1 General
16 6.2 Quality management system
6.3 Procedure
6.3.1 General
17 6.3.2 Determination of permissible activity release rates
18 6.3.3 Determination of standardized leakage rates
6.3.4 Determination of permissible test leakage rates for each verification stage
6.3.5 Selection of appropriate test methods
6.3.6 Performance of test and record of results
7 Determination of permissible activity release rates
7.1 Step 1: List the radioactive contents, Ai
7.2 Step 2: Determine the total releasable activity, RIT
19 7.3 Step 3: Determine the maximum permissible activity release rates, R
8 Determination of standardized leakage rates
8.1 General
20 8.2 Step 4: Determine the activity release rate due to permeation, RP
8.3 Step 5: Determine the maximum permissible activity release rate due to leakage, RG
8.4 Step 6: Determine the activity per unit volume of the containment system medium, C
8.5 Step 7: Determine the maximum permissible volumetric leakage rate of the medium, L
8.6 Step 8: Determine the maximum permissible equivalent capillary leak diameter, D
21 8.7 Step 9: Determine the permissible standardized leakage rate, QSLR
9 Containment-system verification requirements
9.1 Containment-system verification stages
9.1.1 General
22 9.1.2 Design verification
9.1.3 Fabrication verification
9.1.4 Preshipment verification
23 9.1.5 Periodic verification
9.1.6 Maintenance verification
9.2 Verification requirements
9.2.1 General
9.2.2 Step 10: Determine permissible test leakage rate for each verification stage, QTDA, QTDN, QTF, QTS, QTP and QTM
9.2.3 Step 11: Select appropriate test methods
24 10 Leakage test procedure requirements
10.1 General
10.2 Step 12: Perform tests and record results
10.3 Test sensitivity
10.4 Test procedure requirements
10.4.1 General
10.4.2 Testing
25 Annex A (informative) Preferred leakage test methods
39 Annex B (informative) Methods of calculation
44 Annex C (informative) Conversion tables
45 Annex D (informative) Worked examples
80 Annex E (informative) Rationale
93 Bibliography

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BS EN ISO 12807:2021
$215.11