Most recent
ONORM EN ISO 11665-11:2020
Measurement of radioactivity in the environment - Air: radon-222 - Part 11: Test method for soil gas with sampling at depth (ISO 11665-11:2016)
This part of ISO 11665 describes test methods for radon-222 in ground air by means of passive and active in situ sampling at depths in the range between the earth's surface and 2 m. This part of ISO 11665 contains general requirements for sampling techniques which are either passive or active and are short-term or continuous for the in situ measurement of radon 222 activity concentration seam in the ground air. The radon 222 activity concentration in the ground can be determined by point measurement or continuous measurement methods (see ISO 11665-1). In the case of point measurements (ISO 11665-6), the sampling of the ground air is active. In contrast, continuous processes (ISO 11665-5) are usually based on passive sampling. The measurement methods are applicable to all soil types and are determined by the use of the measurement results, taking into account the expected value of the radon-222 activity concentration (phenomenological observation ...
Austrian Standards Institute [on]