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  • BSI
    21/30404333 DC BS ISO 20044-1. Measurement of radioactivity in the environment. Air: aerosols. Test method using sampling by filter media - Part 1. Aerosols sampling
    Edition: 2021
    $44.66
    / user per year

Description of 21/30404333 DC 2021

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 ].



Standard Number21/30404333 DC
TitleBS ISO 20044-1. Measurement of radioactivity in the environment. Air: aerosols. Test method using sampling by filter media - Part 1. Aerosols sampling
StatusDefinitive
Publication Date2021-09-28
Identical National Standard OfISO/DIS 20044
DescriptorsMeasurement, Radioactivity, Air, Aerosols, Test methods
ICS13.040.01 Air quality in general, 17.240 Radiation measurements
CommitteeNCE/2
PublisherBSI
Pages54

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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