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SLOVENSKI STANDARD
01-marec-2023
Zaščita pred sevanjem - Zaprti viri - Metode preskušanja prepuščanja (ISO
9978:2020)
Radiation protection - Sealed sources - Leakage test methods (ISO 9978:2020)
Strahlenschutz - Umschlossene radioaktive Stoffe - Dichtheitsprüfungen (ISO
9978:2020)
Radioprotection - Sources scellées - Méthodes d’essai d’étanchéité (ISO 9978:2020)
Ta slovenski standard je istoveten z: EN ISO 9978:2022
ICS:
13.280 Varstvo pred sevanjem Radiation protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 9978
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2022
EUROPÄISCHE NORM
ICS 13.280
English Version
Radiation protection - Sealed sources - Leakage test
methods (ISO 9978:2020)
Radioprotection - Sources scellées - Méthodes d'essai Strahlenschutz - Umschlossene radioaktive Stoffe -
d'étanchéité (ISO 9978:2020) Dichtheitsprüfungen (ISO 9978:2020)
This European Standard was approved by CEN on 18 December 2022.
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, Türkiye 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9978:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 9978:2020 has been prepared by Technical Committee ISO/TC 85 "Nuclear energy,
nuclear technologies, and radiological protection” of the International Organization for Standardization
(ISO) and has been taken over as EN ISO 9978:2022 by 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 June 2023, and conflicting national standards shall be
withdrawn at the latest by June 2023.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 9978:2020 has been approved by CEN as EN ISO 9978:2022 without any modification.
INTERNATIONAL ISO
STANDARD 9978
Second edition
2020-07
Radiation protection — Sealed sources
— Leakage test methods
Radioprotection — Sources scellées — Méthodes d’essai d’étanchéité
Reference number
ISO 9978:2020(E)
©
ISO 2020
ISO 9978:2020(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
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.
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Phone: +41 22 749 01 11
Email: [email protected]
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Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 9978:2020(E)
Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 3
5 Test methods by radioactive means . 5
5.1 Immersion tests . 5
5.1.1 Immersion test (hot liquid) . 5
5.1.2 Immersion test (boiling liquid) . 5
5.1.3 Immersion test with a liquid scintillator . 6
5.1.4 Immersion test at room temperature . 6
5.1.5 Acceptance criteria . 6
5.2 Gaseous emanation tests . 6
5.2.1 Gaseous emanation test by absorption (for radium-226 sealed sources) . 6
5.2.2 Gaseous emanation test by immersion with a liquid scintillator (for
radium-226 sealed sources) . 6
5.2.3 Gaseous emanation test (for krypton-85 sealed sources) . 6
5.2.4 Other gaseous emanation tests . 7
5.2.5 Acceptance criteria . 7
5.3 Wipe tests . 7
5.3.1 Wet wipe test . . . 7
5.3.2 Dry wipe test . 7
5.3.3 Acceptance criteria . 7
6 Test methods by volumetric means . 7
6.1 Helium mass spectrometer leakage tests . 8
6.1.1 Helium test [equivalent to leak test type B6 in ISO 20485] . 8
6.1.2 Helium pressurisation test [equivalent to leak test type B5 in ISO 20485] . 8
6.1.3 Acceptance criteria . 9
6.2 Bubble leakage tests . 9
6.2.1 Vacuum bubble test [equivalent to immersion technique using vacuum in
[6] 9
EN 1593 . .
6.2.2 Hot-liquid bubble test [equivalent to immersion technique using liquid at
[6]
elevated temperature in EN 1593 . 9
6.2.3 Gas pressurisation bubble test [equivalent to immersion technique using
[6]
pressurisation of the object in EN 1593 . 9
6.2.4 Liquid nitrogen bubble test .10
6.2.5 Acceptance criteria .10
6.3 Water pressurisation test .10
Annex A (informative) Guidance for the choice of the tests to be carried out according to
purpose and sealed source type .11
Bibliography .13
ISO 9978:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
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).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) pri
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