环境中放射性的测量 空气：氚 使用鼓泡取样的测试方法

[中文适用范围]： 本文件描述了一种通过在水溶液中鼓泡捕获空气中的氚来测定大气中氚活度浓度的测试方法。 大气氚活度浓度水平以贝克勒尔每立方米 (Bq∙m-3) 表示。 给出的公式适用于具有四个起泡器的采样系统。 如果要采样的大气中只有 HTO，它们还可以应用于仅具有一个由两个起泡器组成的捕集模块的捕集系统。 本文件不涵盖根据 ISO 9698 或 ISO 13168 以每升捕获溶液贝克勒尔为单位的实验室测试样品结果。 测试方法检测限结果在 0,2 Bq∙m-3 和 0,5 Bq∙m- 之间3、采样时间约为1周时。 [外文原描述]： This document describes a test method to determine the activity concentration of atmospheric tritium by trapping tritium in air by bubbling through a water solution. Atmospheric tritium activity concentration levels are expressed in becquerel per cubic metre (Bq∙m -3 ). The formulae are given for a sampling system with four bubblers. They can also be applied to trapping systems with only one trapping module consisting of two bubblers if only tritiated water vapour (HTO) is in the atmosphere to be sampled. This document does not cover laboratory test sample results, in becquerel per litre of trapping solution, according to ISO 9698 or ISO 13168 . The test method detection limit result is between 0,2 Bq∙m -3 and 0,5 Bq∙m -3 when the sampling duration is about one week.