ISO 18589-5:2009 环境中辐射的测量 土壤 第5部分：锶90的测量
标准编号：ISO 18589-5:2009
中文名称：环境中辐射的测量 土壤 第5部分：锶90的测量
英文名称：Measurement of radioactivity in the environment — Soil — Part 5: Measurement of strontium 90
发布日期：2009-03
标准范围
ISO 18589-5:20 09描述了测量土壤样品中90Sr与90Y和89Sr（纯β发射放射性核素）平衡时的活度的原理。提出了不同的化学分离方法来生产锶和钇源，使用比例计数器（PC）或液体闪烁计数器（LSC）测定其活性。测量方法的选择取决于污染的来源、被分析土壤的特性、所需的测量精度和可用实验室的资源。这些方法用于过去或现在、意外或常规、液体或气体排放后的土壤监测。它还包括监测全球沉降物造成的污染。在最近核事故后立即发生沉降的情况下，89Sr对锶活性总量的贡献不可忽略。ISO 18589-5:20 09提供了在89Sr存在下测定90Sr活性的测量方法。
ISO 18589-5:2009 describes the principles for the measurement of the activity of 90Sr in equilibrium with 90Y and 89Sr, pure beta-emitting radionuclides, in soil samples. Different chemical separation methods are presented to produce strontium and yttrium sources, the activity of which is determined using proportional counter (PC) or liquid scintillation counter (LSC). The selection of the measuring method depends on the origin of the contamination, the characteristics of the soil being analysed, the required accuracy of measurement and the resources of the available laboratories.These methods are used for soil monitoring following past or present, accidental or routine, liquid or gaseous discharges. It also covers the monitoring of contamination caused by global fallout.In the case of recent fallout immediately following a nuclear accident, the contribution of 89Sr to the total amount of strontium activity is not negligible. ISO 18589-5:2009 provides the measurement method to determine the activity of 90Sr in the presence of 89Sr.
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