本文件描述了氡-222点测量方法。它给出了在给定地点以几分钟为尺度对开放和封闭大气中的氡活性浓度进行现场测量的指示。 该测量方法旨在快速评估空气中的氡活性浓度。结果不能外推到氡活动浓度的年度估计值。因此，这种类型的测量不适用于评估年度暴露量或确定是否减少公民对氡或氡衰变产物的暴露。 所述测量方法适用于氡活度浓度大于50Bq·m的空气样品？3. 注:例如，使用适当的设备，可以在土壤中和材料与大气的界面处现场测量氡活度浓度（另见ISO 11665-7[8]）。

This document describes radon-222 spot measurement methods. It gives indications for carrying out spot measurements, at the scale of a few minutes at a given place, of the radon activity concentration in open and confined atmospheres. This measurement method is intended for rapid assessment of the radon activity concentration in the air. The result cannot be extrapolated to an annual estimate of the radon activity concentration. This type of measurement is therefore not applicable for assessment of the annual exposure or for determining whether or not to mitigate citizen exposures to radon or radon decay products. The measurement method described is applicable to air samples with radon activity concentration greater than 50 Bq·m^？3. NOTE For example, using an appropriate device, the radon activity concentration can be spot measured in the soil and at the interface of a material with the atmosphere (see also ISO 11665-7^[8]).