ISO 12807:2018 放射性材料的安全运输 包装件的泄漏试验

标准编号：ISO 12807:2018

中文名称：放射性材料的安全运输 包装件的泄漏试验

英文名称：Safe transport of radioactive materials — Leakage testing on packages

发布日期：2018-09

标准范围

本文件规定了气体泄漏试验标准和试验方法，以证明用于运输放射性材料的包装符合国际原子能机构（IAEA）放射性材料安全运输规定中规定的包装安全要求，具体如下:-设计验证；-制造验证；-装运前核查；-定期核查；-维修验证。本文件描述了在规定试验条件下，将安全壳系统内放射性物质的允许放射性释放与等效气体泄漏率联系起来的方法。这种方法被称为气体泄漏测试方法。然而，在本文件中，可以接受其他方法，前提是这些方法证明放射性物质的任何释放不会超过监管要求，并经主管当局同意。本文件对当量气体泄漏试验和允许活动释放率之间的复杂关系提供了全面和详细的指导。鉴于总体指南已得到普遍认可，在B（U）、B（M）或C类包装认证过程中，详细指南的使用应与主管当局达成一致。应该注意的是，对于给定的包，合规性证明并不限于一种方法。虽然本文件不要求特定的气体泄漏试验程序，但它确实提出了所用任何试验的最低要求。包装设计师或发货人有责任估计或确定放射性物质对环境的最大允许释放率，并选择具有足够灵敏度的适当泄漏试验程序。本文件特别适用于明确规定了监管遏制要求的B（U）、B（M）或C类包装。

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.

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