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BSI 21/30404333 DC:2021 Edition

BSI 21/30404333 DC:2021 Edition

$13.70

BS ISO 20044-1. Measurement of radioactivity in the environment. Air: aerosols. Test method using sampling by filter media – Part 1. Aerosols sampling

Published By Publication Date Number of Pages
BSI 2021 54
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This document provides guidance for:

  • the sampling process of the aerosols in the air using filter media. This documentrt takes into account the specific behaviour of aerosols in ambient air (Annex B);

  • the determination of the activity concentration of aerosols in the air knowing the activity deposited in the media filter;

  • the operating use of continuous air monitoring devices used for real time measurement.

The activity concentration is expressed in becquerel per cubic metre (Bq∙m-3).

This document does not cover the details of measurement test techniques (gamma spectroscopy, global alpha and beta counting, liquid scintillation, alpha spectrometry) used to determine the activity deposited in the media filter, which are either based on existing standards or internal methods developed by the laboratory in charge of those measurements. Also, this document does not cover the variability of the aerosol sizes as given by the composition of the dust contained in ambient air [ 3 ],[ 4 ].

The procedures described here facilitate the sampling of aerosol bound radionuclides. It is supposed to conform to the national and international requirements for monitoring programmes safety standards of IAEA [ 5 ].

The characteristics of the sampling location (coordinates, type of vegetation, obstacles) need to be documented prior to commencing the monitoring. The guidelines of WMO include the criteria for representative measurements of temperature, wind-speed, wind direction, humidity and precipitation for all the weather stations in the world [ 6 ].

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BSI 21/30404333 DC
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