ISO 8690:2020 放射性的测量 放射伽玛射线和放射放射性核素 评定表面材料去污容易程度的试验方法
标准编号：ISO 8690:2020
中文名称：放射性的测量 放射伽玛射线和放射放射性核素 评定表面材料去污容易程度的试验方法
英文名称：Measurement of radioactivity — Gamma ray and beta emitting radionuclides — Test method to assess the ease of decontamination of surface materials
发布日期：2020-09
标准范围
本文件适用于可能被放射性物质污染的表面的测试。易于去污是表面的一种特性，也是选择用于核工业、临时储存或处置设施的表面材料的重要标准，在这些设施中，污染物可以容易且快速地去除而不会损坏表面。本文件中描述的测试是一种基于实验室的快速方法，用于比较不同表面材料的去污难易程度。当选择表面涂层（例如清漆）或不透水层（例如陶瓷和其他表面）时，测试结果可以是要考虑的一个参数。本试验中使用的放射性核素是核工业中常见的含水形式的放射性核素（137Cs、134Cs和60Co）。如果溶液化学稳定且不会腐蚀试样，则根据客户要求，该测试也可用于其他放射性核素和其他化学形式。该测试不测量实际使用中表面材料去污的难易程度，因为这取决于存在的放射性核素、其化学形式、暴露于污染物的持续时间和环境条件等因素。本试验方法并非旨在描述一般去污程序或评估去污程序的效率（参见ISO 7503系列）。如果放射性核素发射的低能量γ射线或β粒子在表面容易衰减，则该测试方法不适用于放射性化学品。
This document applies to the testing of surfaces that may become contaminated by radioactive materials.The ease of decontamination is a property of a surface and an important criterion for selecting surface materials used in the nuclear industry, interim storage or disposal facilities from which contamination can be removed easily and rapidly without damaging the surface. The test described in this document is a rapid laboratory-based method to compare the ease of decontamination of different surface materials.The results from the test can be one parameter to take into account when selecting surface coatings such as varnish or impervious layers such as ceramics and other surfaces. The radionuclides used in this test are those commonly found in the nuclear industry (137Cs, 134Cs and 60Co) in aqueous form. The test can also be adopted for use with other radionuclides and other chemical forms, depending on the customer requirements, if the solutions are chemically stable and do not corrode the test specimen.The test does not measure the ease of decontamination of the surface materials in practical use, as this depends on the radionuclide(s) present, their chemical form, the duration of exposure to the contaminant and the environmental conditions amongst other factors.The test method is not intended to describe general decontamination procedures or to assess the efficiency of decontamination procedures (see ISO 7503 series).The test method is not suitable for use of radiochemicals if the radionuclide emit low energy gamma rays or beta particles that are readily attenuated in the surface.
标准预览图
