EN ISO 11665-5:2015 PDF

Scope: This part of ISO 11665 describes continuous measurement methods for 222 Rn. It provides instructions for the continuous measurement of the change in radon activity concentration over time in open and enclosed atmospheres. This part of ISO 11665 is intended to assess the temporal fluctuations in radon activity concentration in the environment, in public buildings, in houses and at workplaces depending on influencing factors such as ventilation and/or meteorological conditions. The measurement method described is applicable to air samples with radon activity concentrations greater than 5 Bq m-3.

EN ISO 11665-5:2015 Referenced Document

IEC 61577-1:2006 Radiation protection instrumentation - Radon and radon decay product measuring instruments - Part 1: General principles
IEC 61577-2:2014 Radiation protection instrumentation - Radon and radon decay product measuring instruments - Part 2: Specific requirements for 222 Rn and 220 Rn measuring instruments
ISO 11665-1:2012 Measurement of radioactivity in the environment - Air: radon-222 - Part 1: Origins of radon and its short-lived decay products and associated measurement methods
ISO 11929:2010 Determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measurements of ionizing radiation - Fundamentals and application
ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

2020 EN ISO 11665-5:2020 Measurement of radioactivity in the environment - Air: radon-222 - Part 5: Continuous measurement methods of the activity concentration (ISO 11665-5:2020)
2015 EN ISO 11665-5:2015 Measurement of radioactivity in the environment -Air: radon-222 - Part 5: Continuous measurement method of the activity concentration (ISO 11665-5:2012)