Metrologi och mätning. Fysikaliska fenomen

Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: CEN
Svarsdatum: den 5 jul 2019
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This part of ISO 11665 outlines guidance for measuring radon-222 activity concentration and the potential

alpha energy concentration of its short-lived decay products in the air.

The measurement methods fall into three categories:

a) spot measurement methods;

b) continuous measurement methods;

c) integrated measurement methods.

This part of ISO 11665 provides several methods commonly used for measuring radon-222 and its short-lived

decay products in air.

This part of ISO 11665 also provides guidance on the determination of the inherent uncertainty linked to the

measurement methods described in its different parts.

Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: CEN
Svarsdatum: den 5 jul 2019
Se merSe mindre
 

This document describes integrated measurement methods for short-lived radon-222 decay products[4]. It gives indications for measuring the average potential alpha energy concentration of short-lived radon-222 decay products in the air and the conditions of use for the measuring devices.

This document covers samples taken over periods varying from a few weeks to one year. This document is not applicable to systems with a maximum sampling duration of less than one week.

The measurement method described is applicable to air samples with potential alpha energy concentration of short-lived radon-222 decay products greater than 10 nJ/m3 and lower than 1 000 nJ/m3.

NOTE For informative purposes only, this document also addresses the case of radon-220 decay products, given the similarity in behaviour of the radon isotopes 222 and 220.