PD ISO/TR 22930-2:2020 - Evaluating the performance of continuous air monitors. Air monitors based on flow-through sampling techniques without accumulation

PD ISO/TR 22930-2:2020

Evaluating the performance of continuous air monitors. Air monitors based on flow-through sampling techniques without accumulation

Status : Current   Published : May 2020

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PDF

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HARDCOPY



The use of a continuous air monitor (CAM) is mainly motivated by the need to be alerted quickly and in the most accurate way possible with an acceptable false alarm rate when significant activity concentration value is exceeded, in order to take appropriate measures to reduce exposure of those involved.

The performance of this CAM does not only depend on the metrological aspect characterized by the decision threshold, the limit of detection and the measurement uncertainties but also on its dynamic capacity characterized by its response time as well as on the minimum detectable activity concentration corresponding to an acceptable false alarm rate.

The ideal performance is to have a minimum detectable activity concentration as low as possible associated with a very short response time, but unfortunately these two criteria are in opposition. It is therefore important that the CAM and the choice of the adjustment parameters and the alarm levels be in line with the radiation protection objectives.

This document describes

  1. the dynamic behaviour and the determination of the response time,

  2. the determination of the characteristic limits (decision threshold, detection limit, limits of the coverage interval), and

  3. a possible way to determine the minimum detectable activity concentration and the alarms setup.

Finally the annexes of this document show actual examples of CAM data which illustrate how to quantify the CAM performance by determining the response time, the characteristics limits, the minimum detectable activity concentration and the alarms setup.




Standard NumberPD ISO/TR 22930-2:2020
TitleEvaluating the performance of continuous air monitors. Air monitors based on flow-through sampling techniques without accumulation
StatusCurrent
Publication Date15 May 2020
Normative References(Required to achieve compliance to this standard)ISO 11929-1, ISO 16639, IEC 60761-1
Informative References(Provided for Information)ISO 11665-5:2012, ANSI/HPS N13.56:2012, ISO/IEC Guide 98-3-1:2008
International RelationshipsISO/TR 22930-2:2020
DescriptorsLeak tests, Design, Occupational safety, Industrial overalls, Marking, Radioactive materials, Seams, Performance testing, Strength of materials, Chemical-resistance tests, Protective coatings, Particulate air pollutants, Watertightness tests, Dust-tightness tests, Flow measurement, Perforating tests, Breathing apparatus, Instructions for use, Clothing, Testing conditions, Air, Gas flow, Wear resistance, Contamination, Splitting tests, Protective suits, Protective clothing, Performance, Visors, Abrasion-resistant materials, Radiation protection, Tear tests, Gas-resistance tests, Classification systems
ICS13.280
Title in FrenchÉvaluation de la performance des dispositifs de surveillance de l'air en continu Moniteurs d'air basés sur des techniques d'échantillonnage par circulation sans accumulation
CommitteeNCE/2
ISBN978 0 539 03999 3
PublisherBSI
FormatA4
DeliveryYes
Pages40
File Size2.297 MB
Price£214.00


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