EN ISO 11665-5:2020

SLOVENSKI STANDARD
01-april-2020
Nadomešča:
SIST EN ISO 11665-5:2015
Merjenje radioaktivnosti v okolju - Zrak: radon Rn-222 - 5. del: Neprekinjeno
merjenje koncentracije aktivnosti (ISO 11665-5:2020)
Measurement of radioactivity in the environment - Air: radon-222 - Part 5: Continuous
measurement methods of the activity concentration (ISO 11665-5:2020)
Ermittlung der Radioaktivität in der Umwelt - Luft: Radon-222 - Teil 5: Kontinuierliches
Messverfahren für die Aktivitätskonzentration (ISO 11665-5:2020)
Mesurage de la radioactivité dans l'environnement - Air: radon 222 - Partie 5: Méthodes
de mesure en continu de l'activité volumique (ISO 11665-5:2020)
Ta slovenski standard je istoveten z: EN ISO 11665-5:2020
ICS:
13.040.99 Drugi standardi v zvezi s Other standards related to air
kakovostjo zraka quality
17.240 Merjenje sevanja Radiation measurements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11665-5
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 17.240 Supersedes EN ISO 11665-5:2015
English Version
Measurement of radioactivity in the environment - Air:
radon-222 - Part 5: Continuous measurement methods of
the activity concentration (ISO 11665-5:2020)
Mesurage de la radioactivité dans l'environnement - Ermittlung der Radioaktivität in der Umwelt - Luft:
Air: radon 222 - Partie 5: Méthodes de mesure en Radon-222 - Teil 5: Kontinuierliches Messverfahren für
continu de l'activité volumique (ISO 11665-5:2020) die Aktivitätskonzentration (ISO 11665-5:2020)
This European Standard was approved by CEN on 20 January 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11665-5:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11665-5:2020) has been prepared by Technical Committee ISO/TC 85 "Nuclear
energy, nuclear technologies, and radiological protection" in collaboration with Technical Committee
CEN/TC 430 “Nuclear energy, nuclear technologies, and radiological protection” the secretariat of
which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11665-5:2015.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 11665-5:2020 has been approved by CEN as EN ISO 11665-5:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 11665-5
Second edition
2020-01
Measurement of radioactivity in the
environment — Air: radon-222 —
Part 5:
Continuous measurement methods of
the activity concentration
Mesurage de la radioactivité dans l'environnement — Air: radon 222 —
Partie 5: Méthodes de mesure en continu de l'activité volumique
Reference number
ISO 11665-5:2020(E)
©
ISO 2020
ISO 11665-5:2020(E)
© ISO 2020
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
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Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 11665-5:2020(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 . 1
3.2 Symbols . 2
4 Principle . 2
5 Equipment . 3
6 Sampling . 3
6.1 Sampling objective . 3
6.2 Sampling characteristics . . 3
6.3 Sampling conditions . 3
6.3.1 General. 3
6.3.2 Installation of sampling device . 3
6.3.3 Sampling duration . 4
6.3.4 Integration interval . 4
6.3.5 Volume of air sampled . . . 4
7 Detection . 4
8 Measurement . 4
8.1 Procedure . 4
8.2 Influence quantities . 4
8.3 Calibration . 5
9 Expression of results . 5
9.1 Radon activity concentration. 5
9.2 Standard uncertainty . 5
9.3 Decision threshold and detection limit . 5
9.4 Limits of the confidence interval . 5
10 Test report . 6
Annex A (informative) Measurement method using a vented ionization chamber and a
current ionization chamber . 7
Bibliography .13
ISO 11665-5:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
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different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformit
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