90.93 Standard confirmed Sep 12, 2023
ISO
ISO/TC 85/SC 2 Radiological protection
International Standard
13.040.01 Air quality in general | 17.240 Radiation measurements
ISO 11665-7:2012 gives guidelines for estimating the radon-222 surface exhalation rate over a short period (a few hours), at a given place, at the interface of the medium (soil, rock, laid building material, walls, etc.) and the atmosphere. This estimation is based on measuring the radon activity concentration emanating from the surface under investigation and accumulated in a container of a known volume for a known duration.
This method is estimative only, as it is difficult to quantify the influence of many parameters in environmental conditions. ISO 11665-7:2012 is particularly applicable, however, in case of an investigation, a search for sources or a comparative study of exhalation rates at the same site. ISO 11665-7:2012 does not cover calibration conditions for the rate estimation devices.
PUBLISHED
ISO 11665-7:2012
90.93
Standard confirmed
Sep 12, 2023