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CEN

prEN ISO 20045

(Main)

Measurement of the radioactivity in the environment - Air: tritium - Test method using bubbler sampling (ISO 20045:2023)

Measurement of the radioactivity in the environment - Air: tritium - Test method using bubbler sampling (ISO 20045:2023)

This document describes a test method to determine the activity concentration of atmospheric tritium by trapping tritium in air by bubbling through a water solution.
The formulae are given for a sampling system with four bubblers. They can also be applied to trapping systems with only one trapping module consisting of two bubblers if only tritiated water vapour (HTO) is in the atmosphere to be sampled.
This document does not cover laboratory test sample results, in becquerel per litre of trapping solution, according to ISO 9698 or ISO 13168.
The test method detection limit result is between 0,2 Bq∙m-3 and 0,5 Bq∙m-3 when the sampling duration is about one week.

Bestimmung der Radioaktivität in der Umwelt - Luft: Tritium - Messverfahren mit Sammlung mittels Gaswaschflaschen (ISO/DIS 20045:2024)

Dieses Dokument beschreibt ein Prüfverfahren zur Bestimmung der Aktivitätskonzentration luftgetragenen Tri¬tiums durch Einfangen des Tritiums in einer in Gaswaschflaschen enthaltenen wässrigen Lösung. Akti-vitäts¬konzentrationen luftgetragenen Tritiums werden in Becquerel je Kubikmeter (Bqm–3) angegeben.
Die Gleichungen sind für ein Probenahmesystem mit vier Gaswaschflaschen angegeben. Sie können auch für Sammler mit nur einer Sammeleinheit aus zwei Gaswaschflaschen angewendet werden, wenn nur tritiierter Wasserdampf (HTO) aus der Luft gesammelt werden soll.
Dieses Dokument behandelt nicht Ergebnisse von Laborproben in Becquerel je Liter der Rückhaltelösung nach ISO 9698 oder ISO 13168.
Die Nachweisgrenze des Prüfverfahrens liegt zwischen 0,2 Bqm–3 und 0,5 Bqm–3 bei einer Probenahme-dauer von etwa 1 Woche.

Mesurage de la radioactivité dans l’environnement - Air : tritium - Méthode d’essai à l’aide d’un prélèvement par barbotage (ISO 20045:2023)

Merjenje radioaktivnosti v okolju - Zrak: tritij - Preskusna metoda z vzorčenjem z mehurčki (ISO 20045:2023)

General Information

Status
Not Published
Publication Date
15-Apr-2026
ICS
17.240 - Radiation measurements
Technical Committee
CEN/TC 430 - Nuclear energy, nuclear technologies, and radiological protection
Drafting Committee
CEN/TC 430 - Nuclear energy, nuclear technologies, and radiological protection
Current Stage
4060 - Closure of enquiry - Enquiry
Start Date
06-Jun-2024
Due Date
14-Jan-2025
Completion Date
06-Jun-2024
Ref Project
oSIST prEN ISO 20045:2024 - Measurement of the radioactivity in the environment - Air: tritium - Test method using bubbler sampling (ISO 20045:2023)

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SLOVENSKI STANDARD
oSIST prEN ISO 20045:2024
01-maj-2024
Merjenje radioaktivnosti v okolju - Zrak: tritij - Preskusna metoda z vzorčenjem z
mehurčki (ISO 20045:2023)
Measurement of the radioactivity in the environment - Air: tritium - Test method using
bubbler sampling (ISO 20045:2023)
Mesurage de la radioactivité dans l’environnement - Air : tritium - Méthode d’essai à
l’aide d’un prélèvement par barbotage (ISO 20045:2023)
Ta slovenski standard je istoveten z: prEN ISO 20045
ICS:
13.040.01 Kakovost zraka na splošno Air quality in general
17.240 Merjenje sevanja Radiation measurements
oSIST prEN ISO 20045:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 20045:2024

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oSIST prEN ISO 20045:2024
INTERNATIONAL ISO
STANDARD 20045
First edition
2023-05
Measurement of the radioactivity in
the environment — Air: tritium — Test
method using bubbler sampling
Mesurage de la radioactivité dans l’environnement — Air : tritium —
Méthode d’essai à l’aide d’un prélèvement par barbotage
Reference number
ISO 20045:2023(E)
© ISO 2023

---------------------- Page: 3 ----------------------
oSIST prEN ISO 20045:2024
ISO 20045:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 20045:2024
ISO 20045:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 2
3.2 Symbols, definitions and units . 3
4 Principle . 4
5 Influence quantities . 6
6 Equipment . 6
6.1 Description and requirements of the sampling system . 6
6.2 Location of sampling head . 7
6.3 Air flow rate, sampling duration and air volume sampling . 7
6.4 Trapping water solution . 7
6.5 Specificati
...

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