SIST EN IEC 61031:2022
(Main)Nuclear facilities - Instrumentation and control systems - Design, location and application criteria for installed area gamma radiation dose rate monitoring equipment for use during normal operation and anticipated operational occurrences (IEC 61031:2020)
Nuclear facilities - Instrumentation and control systems - Design, location and application criteria for installed area gamma radiation dose rate monitoring equipment for use during normal operation and anticipated operational occurrences (IEC 61031:2020)
This document applies to the design, location and application of installed equipment for
monitoring local gamma radiation dose rates within nuclear facilities during normal operation
and anticipated operational occurrences. High range area gamma radiation dose rate
monitoring equipment for accident conditions currently addressed by IEC 60951-1 and
IEC 60951-3 is not within the scope of this document.
This document does not apply to the measurement of neutron dose rate. Additional equipment
for neutron monitoring may be required, depending on the plant design, if the neutron dose
rate makes a substantial contribution to the total dose equivalent to personnel.
This document provides guidelines for the design principles, the location, the application,
the calibration, the operation, and the testing of installed equipment for continuously
monitoring local gamma radiation dose rates in nuclear facilities under normal operation
conditions and anticipated operational occurrences. These instruments are normally referred
to as area radiation monitors. Portable instruments are also used for this purpose but are not
covered by this document.
Radiation monitors utilized in area radiation monitoring equipment are addressed in
IEC 60532. As discussed in IEC 60532, measurement of gamma radiation may be expressed
by a number of alternative quantities depending on national regulations. However, for this
type of instrument, the most likely quantity to be measured is the air kerma (Gy), or the
ambient dose equivalent H*(10)(Sv).
Kerntechnische Anlagen - Leittechnische Systeme - Auslegungs-, Anordnungs- und Anwendungskriterien für fest installierte Einrichtungen zur Umgebungsüberwachung der Gammadosisleistung zum Einsatz während Normalbetrieb und bei anzunehmenden betrieblichen Ereignissen (IEC 61031:2020)
Installations nucléaires - Systèmes d'instrumentation et de contrôle-commande - Critères de conception, d'implantation et d'application pour les matériels de surveillance du débit de dose de rayonnement gamma à poste fixe, utilisés pendant le fonctionnement normal et lors d'incidents de fonctionnement prévus (IEC 61031:2020)
IEC 61031:2020 s'applique à la conception, l'implantation et l'application des matériels à poste fixe destinés à la surveillance locale des débits de dose de rayonnement gamma dans les installations nucléaires pour le fonctionnement normal et les incidents de fonctionnement prévus. Le matériel de surveillance du débit de dose de rayonnement gamma à large gamme pour les conditions accidentelles est actuellement couvert par l'IEC 60951-1 et l'IEC 60951-3; il n'entre pas dans le domaine d'application du présent document. Le présent document fournit des lignes directrices pour les principes de conception, l'implantation, l'application, l'étalonnage, le fonctionnement et les essais du matériel à poste fixe destiné à la surveillance permanente des débits de dose de rayonnement gamma local dans les installations nucléaires, dans des conditions de fonctionnement normal et d'incidents de fonctionnement prévus. Ces appareils sont généralement appelés moniteurs de rayonnement de zone. Des appareils portatifs sont également utilisés dans ce but, mais ne sont pas couverts par le présent document.
Le présent document est destiné à être utilisé conjointement avec l'IEC 60532:2010. Cette deuxième édition annule et remplace la première édition parue en 1990. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a. extension du domaine d'application de la norme des centrales nucléaires de puissance aux installations nucléaires et alignement du titre en conséquence;
b.prise en compte des normes pertinentes publiées par le SC 45A de l'IEC depuis la publication de la première édition et référence à ces normes, le cas échéant.
Jedrski objekti - Merilna in nadzorna oprema - Načrtovanje, lokacija in merila za uporabo vgrajene opreme za območno nadzorovanje stopnje sevanja gama med normalnim obratovanjem in ob pričakovanih obratovalnih dogodkih (IEC 61031:2020)
Ta dokument se uporablja za načrtovanje, lokacijo in uporabo vgrajene opreme za nadzorovanje lokalne stopnje sevanja gama v jedrskih objektih med normalnim obratovanjem in ob pričakovanih obratovalnih dogodkih. Oprema za nadzorovanje stopnje sevanja gama na širšem območju ob nesrečah, ki je trenutno obravnavana v standardih IEC 60951-1 in IEC 60951-3, ne spada na področje uporabe tega dokumenta. Ta dokument se ne uporablja za merjenje stopnje nevtronskega sevanja. Če stopnja nevtronskega sevanja bistveno prispeva k skupni ekvivalentni dozi za osebje, je lahko glede na zasnovo elektrarne potrebna dodatna oprema za nadzorovanje nevtronskega sevanja. Ta dokument podaja smernice za načela načrtovanja, lokacijo, uporabo, umerjanje, delovanje in preskušanje vgrajene opreme za stalno nadzorovanje območnih stopenj sevanja gama v jedrskih objektih med normalnim obratovanjem in ob pričakovanih obratovalnih dogodkih. Za te naprave se običajno uporablja izraz »merilniki območnega sevanja«. Za ta namen se uporablja tudi prenosna oprema, ki pa je ta dokument ne zajema. Merilniki sevanja, ki se uporabljajo v opremi za nadzorovanje območnega sevanja, so obravnavani v standardu IEC 60532. Kot je navedeno v standardu IEC 60532, se lahko meritve sevanja gama izrazijo v različnih količinah, določenih v nacionalnih predpisih. Vendar se pri tovrstnih napravah najpogosteje uporablja zračna kerma (Gy) ali ekvivalentna doza H*(10)(Sv).
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 61031:2022
01-oktober-2022
Jedrski objekti - Merilna in nadzorna oprema - Načrtovanje, lokacija in merila za
uporabo vgrajene opreme za območno nadzorovanje stopnje sevanja gama med
normalnim obratovanjem in ob pričakovanih obratovalnih dogodkih (IEC
61031:2020)
Nuclear facilities - Instrumentation and control systems - Design, location and application
criteria for installed area gamma radiation dose rate monitoring equipment for use during
normal operation and anticipated operational occurrences (IEC 61031:2020)
Kerntechnische Anlagen - Leittechnische Systeme - Auslegungs-, Anordnungs- und
Anwendungskriterien für fest installierte Einrichtungen zur Umgebungsüberwachung der
Gammadosisleistung zum Einsatz während Normalbetrieb und bei anzunehmenden
betrieblichen Ereignissen (IEC 61031:2020)
Installations nucléaires - Systèmes d'instrumentation et de contrôle-commande - Critères
de conception, d'implantation et d'application pour les matériels de surveillance du débit
de dose de rayonnement gamma à poste fixe, utilisés pendant le fonctionnement normal
et lors d'incidents de fonctionnement prévus (IEC 61031:2020)
Ta slovenski standard je istoveten z: EN IEC 61031:2022
ICS:
13.280 Varstvo pred sevanjem Radiation protection
27.120.10 Reaktorska tehnika Reactor engineering
SIST EN IEC 61031:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 61031:2022
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SIST EN IEC 61031:2022
EUROPEAN STANDARD EN IEC 61031
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2022
ICS 13.280; 27.120.10
English Version
Nuclear facilities - Instrumentation and control systems - Design,
location and application criteria for installed area gamma
radiation dose rate monitoring equipment for use during normal
operation and anticipated operational occurrences
(IEC 61031:2020)
Installations nucléaires - Systèmes d'instrumentation et de Kerntechnische Anlagen - Leittechnische Systeme -
contrôle-commande - Critères de conception, d'implantation Auslegungs-, Anordnungs- und Anwendungskriterien für
et d'application pour les matériels de surveillance du débit fest installierte Einrichtungen zur Umgebungsüberwachung
de dose de rayonnement gamma à poste fixe, utilisés der Gammadosisleistung zum Einsatz während
pendant le fonctionnement normal et lors d'incidents de Normalbetrieb und bei anzunehmenden betrieblichen
fonctionnement prévus Ereignissen
(IEC 61031:2020) (IEC 61031:2020)
This European Standard was approved by CENELEC on 2022-08-08. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61031:2022 E
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SIST EN IEC 61031:2022
EN IEC 61031:2022 (E)
European foreword
This document (EN IEC 61031:2022) consists of the text of IEC 61031:2020, prepared by IEC/TC 45
"Instrumentation, control and electrical power systems of nuclear facilities".
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-08-08
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) 2025-08-08
conflicting with this document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN-CENELEC shall not be held responsible for identifying any or all such patent rights.
As stated in the nuclear safety directive 2009/71/EURATOM, Chapter 1, Article 2, item 2, Member States
are not prevented from taking more stringent safety measures in the subject-matter covered by the
Directive, in compliance with Community law.
In a similar manner, this European standard does not prevent Member States from taking more stringent
nuclear safety and/or security measures in the subject-matter covered by this standard.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN and CENELEC
websites.
Endorsement notice
The text of the International Standard IEC 61031:2020 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60761-1:2002 NOTE Harmonized as EN 60761-1:2004 (modified)
IEC 60761-2 NOTE Harmonized as EN 60761-2
IEC 60761-3:2002 NOTE Harmonized as EN 60761-3:2004 (not modified)
IEC 60761-4:2002 NOTE Harmonized as EN 60761-4:2004 (not modified)
IEC 60761-5:2002 NOTE Harmonized as EN 60761-5:2004 (modified)
IEC 60861:2006 NOTE Harmonized as EN 60861:2008 (modified)
IEC 60964:2018 NOTE Harmonized as EN IEC 60964:2019 (not modified)
IEC 61500:2018 NOTE Harmonized as EN IEC 61500:2019 (not modified)
IEC 61508-1:2010 NOTE Harmonized as EN 61508-1:2010 (not modified)
IEC 61508-2:2010 NOTE Harmonized as EN 61508-2:2010 (not modified)
2
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SIST EN IEC 61031:2022
EN IEC 61031:2022 (E)
IEC 61508-3:2010 NOTE Harmonized as EN 61508-3:2010 (not modified)
IEC 61508-4:2010 NOTE Harmonized as EN 61508-4:2010 (not modified)
IEC 62645:2019 NOTE Harmonized as EN IEC 62645:2020 (not modified)
IEC 63046:2020 NOTE Harmonized as EN IEC 63046:2021 (not modified)
ISO 4037-1:2019 NOTE Harmonized as EN ISO 4037-1:2021 (not modified)
ISO 4037-3:2019 NOTE Harmonized as EN ISO 4037-3:2021 (not modified)
ISO/IEC 27001:2013 NOTE Harmonized as EN ISO/IEC 27001:2017 (not modified)
ISO/IEC 27002:2013 NOTE Harmonized as EN ISO/IEC 27002:2017 (not modified)
3
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SIST EN IEC 61031:2022
EN IEC 61031:2022 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-395 2014 International Electrotechnical Vocabulary - - -
Part 395: Nuclear instrumentation: Physical
phenomena, basic concepts, instruments,
systems, equipment and detectors
IEC 60532 2010 Radiation protection instrumentation - - -
Installed dose rate meters, warning
assemblies and monitors - X and gamma
radiation of energy between 50 keV and 7
MeV
IEC 60880 1986 Software for computers in the safety systems - -
of nuclear power stations
IEC 60951-1 - Radiation monitoring equipment for accident - -
and post-accident conditions in nuclear
power plants. Part 1: General requirements
IEC 60951-3 - Radiation monitoring equipment for accident - -
and post-accident conditions in nuclear
power plants. Part 3: High range area gamma
radiation dose rate monitoring equipment
IEC 60980 1989 Recommended practices for seismic - -
qualification of electrical equipment of the
safety system for nuclear generating stations
IEC 60987 - Nuclear power plants - Instrumentation and EN 60987 -
control important to safety - Hardware design
requirements for computer-based systems
IEC 61226 2009 Nuclear power plants - Instrumentation and EN 61226 2010
control important to safety - Classification of
instrumentation and control functions
IEC 61513 2011 Nuclear power plants - Instrumentation and EN 61513 2013
control important to safety - General
requirements for systems
IEC 62003 2020 Nuclear power plants - Instrumentation, EN IEC 62003 2020
control and electrical power systems -
Requirements for electromagnetic
compatibility testing
4
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SIST EN IEC 61031:2022
EN IEC 61031:2022 (E)
Publication Year Title EN/HD Year
IEC 62138 2018 Nuclear power plants - Instrumentation and EN IEC 62138 2019
control systems important to safety -
Software aspects for computer-based
systems performing category B or C functions
IEC 62566 2012 Nuclear power plants - Instrumentation and EN 62566 2014
control important to safety - Development of
HDL-programmed integrated circuits for
systems performing category A functions
IEC 62701 2014 Fluids for electrotechnical applications - EN 62701 2014
Recycled mineral insulating oils for
transformers and switchgears
IEC/IEEE 60780-323 2016 Nuclear facilities - Electrical equipment EN 60780-323 2017
important to safety - Qualification
5
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SIST EN IEC 61031:2022
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SIST EN IEC 61031:2022
IEC 61031
®
Edition 2.0 2020-07
INTERNATIONAL
STANDARD
Nuclear facilities – Instrumentation and control systems – Design, location and
application criteria for installed area gamma radiation dose rate monitoring
equipment for use during normal operation and anticipated operational
occurrences
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.280; 27.120.10 ISBN 978-2-8322-8586-2
Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission
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SIST EN IEC 61031:2022
– 2 – IEC 61031:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Abbreviated terms . 11
5 Design principles . 11
5.1 Function and application criteria . 11
5.2 General requirements . 12
5.2.1 General characteristics and lifecycle . 12
5.2.2 Safety classification and applicable standards . 12
5.3 Range of measurements . 13
5.4 Location criteria . 13
5.4.1 General . 13
5.4.2 Detector assembly . 14
5.4.3 Processing assembly . 14
5.4.4 Alarm assembly . 14
5.5 Energy response . 14
5.6 Signal processing and display . 15
5.7 Power supply . 15
6 Functional test . 15
7 Qualification . 15
7.1 General . 15
7.2 Environmental qualification . 15
7.3 Seismic qualification . 16
7.4 Electromagnetic interference. 16
8 Calibration . 16
8.1 General . 16
8.2 Calibration and functional check . 16
8.2.1 General . 16
8.2.2 Initial calibration . 16
8.2.3 Calibration check after installation . 16
8.2.4 Functional check. 16
8.2.5 Countermeasures to loss of monitoring during calibration or functional
check . 17
8.3 Radiation calibration . 17
Annex A (informative) Examples of locations and measuring ranges of area radiation
monitors. 18
Annex B (informative) "Foldback" of detector . 20
Bibliography . 21
Figure B.1 – Foldback illustration . 20
Figure B.2 – GM recovery times . 20
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SIST EN IEC 61031:2022
IEC 61031:2020 © IEC 2020 – 3 –
Table 1 – Overview of the standards covering the domain of radiation monitoring in
nuclear facilities . 7
Table A.1 – Light water cooled reactor plants . 18
Table A.2 – Gas cooled reactor plants . 18
Table A.3 – Sodium cooled fast reactor plants . 19
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SIST EN IEC 61031:2022
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NUCLEAR FACILITIES –
INSTRUMENTATION AND CONTROL SYSTEMS –
DESIGN, LOCATION AND APPLICATION CRITERIA FOR
INSTALLED AREA GAMMA RADIATION DOSE RATE MONITORING
EQUIPMENT FOR USE DURING NORMAL OPERATION AND ANTICIPATED
OPERATIONAL OCCURRENCES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61031 has been prepared by subcommittee 45A: Instrumentation,
control and electrical power systems of nuclear facilities, of IEC technical committee 45: Nuclear
instrumentation.
This document is to be used in conjunction with IEC 60532:2010.
This second edition cancels and replaces the first edition published in 1990. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) The scope of the standard is extended from nuclear power plants to nuclear facilities and
the title is accordingly aligned.
b) The relevant standards published by IEC SC 45A since the publication of the first edition
are taken into account and refered to when relevant.
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SIST EN IEC 61031:2022
IEC 61031:2020 © IEC 2020 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
45A/1328/FDIS 45A/1341/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN IEC 61031:2022
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INTRODUCTION
a) Technical background, main issues and organisation of the standard
This IEC standard specifically focuses on radiation monitoring systems used for normal
operation and anticipated operational occurrences in nuclear facilities such as nuclear power
plants.
This document is intended for use by purchasers in developing specifications for their plant
specific radiation monitoring systems and by manufacturers to identify needed product
characteristics when developing systems for normal operation and anticipated operational
occurrences. Some specific instrument characteristics such as measurement range, required
energy response, and ambient environment requirements will depend upon the specific
application. In such cases guidance is provided on determining the specific requirements, but
specific requirements themselves are not stated.
This document is intended to be used in conjunction with IEC 60532:2010.
For area gamma radiation dose rate monitoring equipment for accident and post-accident
conditions refer to IEC 60951-1 and IEC 60951-3 (not within the scope of this document).
b) Situation of the current standard in the structure of the IEC SC 45A standard series
IEC 61031 is at the third level in the hierarchy of SC 45A standards.
This document provides requirements for equipment for area radiation monitoring in normal
conditions in conjunction with IEC 60532. Other standards developed by SC 45A and SC 45B
provide guidance on instruments used for monitoring radiation as part of normal operations.
The IEC 60761 series provides requirements for equipment for continuous off-line monitoring
of radioactivity in gaseous effluents in normal conditions. IEC 60861 provides requirements for
equipment for continuous off-line monitoring of radioactivity in liquid effluents in normal
conditions. IEC 60768 provides requirements for equipment for continuous in-line and on-line
monitoring of radioactivity in process stream in normal and incident conditions. Finally,
ISO 2889 gives guidance on gas and particulate sampling. In addition, IEC 62705 was issued
on July 2014. IEC 62705 provides guidance on the application of existing IEC/ISO standards
covering design and qualification of system and equipment for RMS, and the overviews of the
standards covering the radiation monitoring in nuclear facilities are listed in Table 1 below.
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SIST EN IEC 61031:2022
IEC 61031:2020 © IEC 2020 – 7 –
Table 1 – Overview of the standards covering
the domain of radiation monitoring in nuclear facilities
IEC
Developer ISO
SC 45A SC 45B
Accident and
Scope Sampling Calibration post accident Normal conditions
conditions
IEC 62302,
ISO 4037-1, IEC 60951-1,
Radioactive noble gas
ISO 2889 N/A IEC 60761-1,
off-line monitoring
ISO 4037-3 IEC 60951-2
IEC 60761-3
ISO 4037-1, IEC 60951-1, IEC 60761-1,
Radioactive aerosol off-
ISO 2889 N/A
line monitoring
ISO 4037-3 IEC 60951-2 IEC 60761-2
ISO 4037-1, IEC 60951-1, IEC 60761-1,
Radioactive iodine off-
ISO 2889 N/A
line monitoring
ISO 4037-3 IEC 60951-2 IEC 60761-4
Liquid off-line
N/A N/A N/A N/A IEC 60861
monitoring
IEC 62303 /
Tritium off-line
N/A N/A N/A N/A IEC 60761-1,
monitoring
IEC 60761-5
ISO 4037-1, IEC 60951-1,
On-line or in-line
N/A IEC 60768 N/A
monitoring
ISO 4037-3 IEC 60951-4
ISO 4037-1, IEC 60951-1,
Area monitoring N/A IEC 61031 IEC 60532
ISO 4037-3 IEC 60951-3
Centralized system N/A N/A IEC 61504, IEC 60960 IEC 61559-1
IEC 61513, IEC 60880,
IEC 60987, IEC 61226,
Classification/basic
N/A N/A IEC 62138, IEC 62566, N/A
requirements
IEC 62645, IEC 61250
IEC 61500, IEC 61504
IEC 60980, IEC 62003,
Qualification N/A N/A IEC 62706
IEC/IEEE 60780-323
For more details on the structure of the IEC SC 45A standard series, see item d) of this
introduction.
c) Recommendations and limitations regarding the application of this Standard
It is important to note that this document establishes no additional functional requirements for
safety systems.
d) Description of the structure of the IEC SC 45A standard series and relationships with
other IEC documents and other bodies’ documents (IAEA, ISO)
The top-level documents of the IEC SC 45A standard series are IEC 61513 and IEC 63046.
IEC 61513 provides general requirements for I&C systems and equipment that are used to
perform functions important to safety in NPPs. IEC 63046 provides general requirements for
electrical power systems of NPPs; it covers power supply systems including the supply systems
of the I&C systems. IEC 61513 and IEC 63046 are to be considered in conjunction and at the
same level. IEC 61513 and IEC 63046 structure the IEC SC 45A standard series and shape a
complete framework establishing general requirements for instrumentation, control and
electrical systems for nuclear power plants.
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IEC 61513 and IEC 63046 refer directly to other IEC SC 45A standards for general topics
related to categorization of functions and classification of systems, qualification, separation,
defence against common cause failure, control room design, electromagnetic compatibility,
cybersecurity, software and hardware aspects for programmable digital systems, coordination
of safety and security requirements and management of ageing. The standards referenced
directly at this second level should be considered together with IEC 61513 and IEC 63046 as a
consistent document set.
At a third level, IEC SC 45A standards not directly referenced by IEC 61513 or by IEC 63046
are standards related to specific equipment, technical methods, or specific activities. Usually
these documents, which make reference to second-level documents for general topics, can be
used on their own.
A fourth level extending the IEC SC 45A standard series, corresponds to the technical reports
which are not normative.
The IEC SC 45A standards series consistently implements and details the safety and security
principles and basic aspects provided in the relevant IAEA safety standards and in the relevant
documents of the IAEA nuclear security series (NSS). In particular this includes the IAEA
requirements SSR-2/1, establishing safety requirements related to the design of nuclear power
plants (NPPs), the IAEA safety guide SSG-30 dealing with the safety classification of structures,
systems and components in NPPs, the IAEA safety guide SSG-39 dealing with the design of
instrumentation and control systems for NPPs, the IAEA safety guide SSG-34 dealing with the
design of electrical power systems for NPPs and the implementing guide NSS17 for computer
security at nuclear facilities. The safety and security terminology and definitions used by
SC 45A standards are consistent with those used by the IAEA.
IEC 61513 and IEC 63046 have adopted a presentation format similar to the basic safety
publication IEC 61508 with an overall life-cycle framework and a system life-cycle framework.
Regarding nuclear safety, IEC 61513 and IEC 63046 provide the interpretation of the general
requirements of IEC 61508-1, IEC 61508-2 and IEC 61508-4, for the nuclear application sector.
In this framework IEC 60880, IEC 62138 and IE
...
SLOVENSKI STANDARD
oSIST prEN IEC 61031:2022
01-julij-2022
Jedrski objekti - Merilna in nadzorna oprema - Načrtovanje, lokacija in merila za
uporabo vgrajene opreme za območno nadzorovanje stopnje sevanja gama med
normalnim obratovanjem in ob pričakovanih obratovalnih dogodkih
Nuclear facilities - Instrumentation and control systems - Design, location and application
criteria for installed area gamma radiation dose rate monitoring equipment for use during
normal operation and anticipated operational occurrences
Ta slovenski standard je istoveten z: prEN IEC 61031:2022
ICS:
13.280 Varstvo pred sevanjem Radiation protection
27.120.10 Reaktorska tehnika Reactor engineering
oSIST prEN IEC 61031:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 61031:2022
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oSIST prEN IEC 61031:2022
EUROPEAN STANDARD DRAFT
prEN IEC 61031
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2022
ICS 13.280; 27.120.10 -
English Version
Nuclear facilities - Instrumentation and control systems - Design,
location and application criteria for installed area gamma
radiation dose rate monitoring equipment for use during normal
operation and anticipated operational occurrences
(IEC 61031:2020)
To be completed To be completed
(IEC 61031:2020) (IEC 61031:2020)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2022-07-01.
The text of this draft consists of the text of IEC 61031:2020 (45A/1328/FDIS).
If this draft becomes a European Standard, CENELEC 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.
This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 75689 Ref. No. prEN IEC 61031:2022 E
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oSIST prEN IEC 61031:2022
prEN IEC 61031:2022 (E)
European foreword
This document (prEN IEC 61031:2022) consists of the text of document IEC 61031:2020, prepared by
IEC/TC 45 "Instrumentation, control and electrical power systems of nuclear facilities"
This document is currently submitted to the CENELEC Enquiry.
The following dates are proposed:
• latest date by which the existence of this document (doa) dor + 6 months
has to be announced at national level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be withdrawn (to be confirmed or
modified when voting)
As stated in the nuclear safety directive 2009/71/EURATOM, Chapter 1, Article 2, item 2, Member States
are not prevented from taking more stringent safety measures in the subject-matter covered by the
Directive, in compliance with Community law.
In a similar manner, this European standard does not prevent Member States from taking more stringent
nuclear safety and/or security measures in the subject-matter covered by this standard.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60761-1:2002 NOTE Harmonized as EN 60761-1:2004
IEC 60761-2 NOTE Harmonized as EN 60761-2
IEC 60761-3:2002 NOTE Harmonized as EN 60761-3:2004 (not modified)
IEC 60761-4:2002 NOTE Harmonized as EN 60761-4:2004 (not modified)
IEC 60761-5:2002 NOTE Harmonized as EN 60761-5:2004
IEC 60861:2006 NOTE Harmonized as EN 60861:2008
IEC 60964:2018 NOTE Harmonized as EN IEC 60964:2019 (not modified)
IEC 61500:2018 NOTE Harmonized as EN IEC 61500:2019 (not modified)
IEC 61508-1:2010 NOTE Harmonized as EN 61508-1:2010 (not modified)
IEC 61508-2:2010 NOTE Harmonized as EN 61508-2:2010 (not modified)
IEC 61508-4:2010 NOTE Harmonized as EN 61508-4:2010 (not modified)
IEC 62645:2019 NOTE Harmonized as EN IEC 62645:2020 (not modified)
IEC 63046 NOTE Harmonized as EN IEC 63046
ISO 4037-1:2019 NOTE Harmonized as EN ISO 4037-1:2021 (not modified)
ISO 4037-3:2019 NOTE Harmonized as EN ISO 4037-3:2021 (not modified)
ISO/IEC 27001:2013 NOTE Harmonized as EN ISO/IEC 27001:2017 (not modified)
ISO/IEC 27002:2013 NOTE Harmonized as EN ISO/IEC 27002:2017 (not modified)
2
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prEN IEC 61031:2022 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-395 2014 International Electrotechnical Vocabulary - - -
Part 395: Nuclear instrumentation: Physical
phenomena, basic concepts, instruments,
systems, equipment and detectors
IEC 60532 2010 Radiation protection instrumentation - - -
Installed dose rate meters, warning
assemblies and monitors - X and gamma
radiation of energy between 50 keV and 7
MeV
IEC 60880 1986 Software for computers in the safety - -
systems of nuclear power stations
IEC 60951-1 - Radiation monitoring equipment for - -
accident and post-accident conditions in
nuclear power plants. Part 1: General
requirements
IEC 60951-3 - Radiation monitoring equipment for - -
accident and post-accident conditions in
nuclear power plants. Part 3: High range
area gamma radiation dose rate monitoring
equipment
IEC 60980 1989 Recommended practices for seismic - -
qualification of electrical equipment of the
safety system for nuclear generating
stations
IEC 60987 - Nuclear power plants - Instrumentation and EN 60987 -
control important to safety - Hardware
design requirements for computer-based
systems
IEC 61226 2009 Nuclear power plants - Instrumentation and EN 61226 2010
control important to safety - Classification
of instrumentation and control functions
IEC 61513 2011 Nuclear power plants - Instrumentation and EN 61513 2013
control important to safety - General
requirements for systems
IEC 62003 2020 Nuclear power plants - Instrumentation, EN IEC 62003 2020
control and electrical power systems -
Requirements for electromagnetic
compatibility testing
IEC 62138 2018 Nuclear power plants - Instrumentation and EN IEC 62138 2019
control systems important to safety -
Software aspects for computer-based
systems performing category B or C
functions
3
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oSIST prEN IEC 61031:2022
prEN IEC 61031:2022 (E)
IEC 62566 2012 Nuclear power plants - Instrumentation and EN 62566 2014
control important to safety - Development
of HDL-programmed integrated circuits for
systems performing category A functions
IEC 62701 2014 Fluids for electrotechnical applications -- EN 62701 2014
Recycled mineral insulating oils for
transformers and switchgears
IEC/IEEE 60780- 2016 Nuclear facilities - Electrical equipment EN 60780-323 2017
323 important to safety - Qualification
4
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oSIST prEN IEC 61031:2022
IEC 61031
®
Edition 2.0 2020-07
INTERNATIONAL
STANDARD
Nuclear facilities – Instrumentation and control systems – Design, location and
application criteria for installed area gamma radiation dose rate monitoring
equipment for use during normal operation and anticipated operational
occurrences
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.280; 27.120.10 ISBN 978-2-8322-8586-2
Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission
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oSIST prEN IEC 61031:2022
– 2 – IEC 61031:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Abbreviated terms . 11
5 Design principles . 11
5.1 Function and application criteria . 11
5.2 General requirements . 12
5.2.1 General characteristics and lifecycle . 12
5.2.2 Safety classification and applicable standards . 12
5.3 Range of measurements . 13
5.4 Location criteria . 13
5.4.1 General . 13
5.4.2 Detector assembly . 14
5.4.3 Processing assembly . 14
5.4.4 Alarm assembly . 14
5.5 Energy response . 14
5.6 Signal processing and display . 15
5.7 Power supply . 15
6 Functional test . 15
7 Qualification . 15
7.1 General . 15
7.2 Environmental qualification . 15
7.3 Seismic qualification . 16
7.4 Electromagnetic interference. 16
8 Calibration . 16
8.1 General . 16
8.2 Calibration and functional check . 16
8.2.1 General . 16
8.2.2 Initial calibration . 16
8.2.3 Calibration check after installation . 16
8.2.4 Functional check. 16
8.2.5 Countermeasures to loss of monitoring during calibration or functional
check . 17
8.3 Radiation calibration . 17
Annex A (informative) Examples of locations and measuring ranges of area radiation
monitors. 18
Annex B (informative) "Foldback" of detector . 20
Bibliography . 21
Figure B.1 – Foldback illustration . 20
Figure B.2 – GM recovery times . 20
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oSIST prEN IEC 61031:2022
IEC 61031:2020 © IEC 2020 – 3 –
Table 1 – Overview of the standards covering the domain of radiation monitoring in
nuclear facilities . 7
Table A.1 – Light water cooled reactor plants . 18
Table A.2 – Gas cooled reactor plants . 18
Table A.3 – Sodium cooled fast reactor plants . 19
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– 4 – IEC 61031:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NUCLEAR FACILITIES –
INSTRUMENTATION AND CONTROL SYSTEMS –
DESIGN, LOCATION AND APPLICATION CRITERIA FOR
INSTALLED AREA GAMMA RADIATION DOSE RATE MONITORING
EQUIPMENT FOR USE DURING NORMAL OPERATION AND ANTICIPATED
OPERATIONAL OCCURRENCES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61031 has been prepared by subcommittee 45A: Instrumentation,
control and electrical power systems of nuclear facilities, of IEC technical committee 45: Nuclear
instrumentation.
This document is to be used in conjunction with IEC 60532:2010.
This second edition cancels and replaces the first edition published in 1990. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) The scope of the standard is extended from nuclear power plants to nuclear facilities and
the title is accordingly aligned.
b) The relevant standards published by IEC SC 45A since the publication of the first edition
are taken into account and refered to when relevant.
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oSIST prEN IEC 61031:2022
IEC 61031:2020 © IEC 2020 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
45A/1328/FDIS 45A/1341/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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oSIST prEN IEC 61031:2022
– 6 – IEC 61031:2020 © IEC 2020
INTRODUCTION
a) Technical background, main issues and organisation of the standard
This IEC standard specifically focuses on radiation monitoring systems used for normal
operation and anticipated operational occurrences in nuclear facilities such as nuclear power
plants.
This document is intended for use by purchasers in developing specifications for their plant
specific radiation monitoring systems and by manufacturers to identify needed product
characteristics when developing systems for normal operation and anticipated operational
occurrences. Some specific instrument characteristics such as measurement range, required
energy response, and ambient environment requirements will depend upon the specific
application. In such cases guidance is provided on determining the specific requirements, but
specific requirements themselves are not stated.
This document is intended to be used in conjunction with IEC 60532:2010.
For area gamma radiation dose rate monitoring equipment for accident and post-accident
conditions refer to IEC 60951-1 and IEC 60951-3 (not within the scope of this document).
b) Situation of the current standard in the structure of the IEC SC 45A standard series
IEC 61031 is at the third level in the hierarchy of SC 45A standards.
This document provides requirements for equipment for area radiation monitoring in normal
conditions in conjunction with IEC 60532. Other standards developed by SC 45A and SC 45B
provide guidance on instruments used for monitoring radiation as part of normal operations.
The IEC 60761 series provides requirements for equipment for continuous off-line monitoring
of radioactivity in gaseous effluents in normal conditions. IEC 60861 provides requirements for
equipment for continuous off-line monitoring of radioactivity in liquid effluents in normal
conditions. IEC 60768 provides requirements for equipment for continuous in-line and on-line
monitoring of radioactivity in process stream in normal and incident conditions. Finally,
ISO 2889 gives guidance on gas and particulate sampling. In addition, IEC 62705 was issued
on July 2014. IEC 62705 provides guidance on the application of existing IEC/ISO standards
covering design and qualification of system and equipment for RMS, and the overviews of the
standards covering the radiation monitoring in nuclear facilities are listed in Table 1 below.
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oSIST prEN IEC 61031:2022
IEC 61031:2020 © IEC 2020 – 7 –
Table 1 – Overview of the standards covering
the domain of radiation monitoring in nuclear facilities
IEC
Developer ISO
SC 45A SC 45B
Accident and
Scope Sampling Calibration post accident Normal conditions
conditions
IEC 62302,
ISO 4037-1, IEC 60951-1,
Radioactive noble gas
ISO 2889 N/A IEC 60761-1,
off-line monitoring
ISO 4037-3 IEC 60951-2
IEC 60761-3
ISO 4037-1, IEC 60951-1, IEC 60761-1,
Radioactive aerosol off-
ISO 2889 N/A
line monitoring
ISO 4037-3 IEC 60951-2 IEC 60761-2
ISO 4037-1, IEC 60951-1, IEC 60761-1,
Radioactive iodine off-
ISO 2889 N/A
line monitoring
ISO 4037-3 IEC 60951-2 IEC 60761-4
Liquid off-line
N/A N/A N/A N/A IEC 60861
monitoring
IEC 62303 /
Tritium off-line
N/A N/A N/A N/A IEC 60761-1,
monitoring
IEC 60761-5
ISO 4037-1, IEC 60951-1,
On-line or in-line
N/A IEC 60768 N/A
monitoring
ISO 4037-3 IEC 60951-4
ISO 4037-1, IEC 60951-1,
Area monitoring N/A IEC 61031 IEC 60532
ISO 4037-3 IEC 60951-3
Centralized system N/A N/A IEC 61504, IEC 60960 IEC 61559-1
IEC 61513, IEC 60880,
IEC 60987, IEC 61226,
Classification/basic
N/A N/A IEC 62138, IEC 62566, N/A
requirements
IEC 62645, IEC 61250
IEC 61500, IEC 61504
IEC 60980, IEC 62003,
Qualification N/A N/A IEC 62706
IEC/IEEE 60780-323
For more details on the structure of the IEC SC 45A standard series, see item d) of this
introduction.
c) Recommendations and limitations regarding the application of this Standard
It is important to note that this document establishes no additional functional requirements for
safety systems.
d) Description of the structure of the IEC SC 45A standard series and relationships with
other IEC documents and other bodies’ documents (IAEA, ISO)
The top-level documents of the IEC SC 45A standard series are IEC 61513 and IEC 63046.
IEC 61513 provides general requirements for I&C systems and equipment that are used to
perform functions important to safety in NPPs. IEC 63046 provides general requirements for
electrical power systems of NPPs; it covers power supply systems including the supply systems
of the I&C systems. IEC 61513 and IEC 63046 are to be considered in conjunction and at the
same level. IEC 61513 and IEC 63046 structure the IEC SC 45A standard series and shape a
complete framework establishing general requirements for instrumentation, control and
electrical systems for nuclear power plants.
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oSIST prEN IEC 61031:2022
– 8 – IEC 61031:2020 © IEC 2020
IEC 61513 and IEC 63046 refer directly to other IEC SC 45A standards for general topics
related to categorization of functions and classification of systems, qualification, separation,
defence against common cause failure, control room design, electromagnetic compatibility,
cybersecurity, software and hardware aspects for programmable digital systems, coordination
of safety and security requirements and management of ageing. The standards referenced
directly at this second level should be considered together with IEC 61513 and IEC 63046 as a
consistent document set.
At a third level, IEC SC 45A standards not directly referenced by IEC 61513 or by IEC 63046
are standards related to specific equipment, technical methods, or specific activities. Usually
these documents, which make reference to second-level documents for general topics, can be
used on their own.
A fourth level extending the IEC SC 45A standard series, corresponds to the technical reports
which are not normative.
The IEC SC 45A standards series consistently implements and details the safety and security
principles and basic aspects provided in the relevant IAEA safety standards and in the relevant
documents of the IAEA nuclear security series (NSS). In particular this includes the IAEA
requirements SSR-2/1, establishing safety requirements related to the design of nuclear power
plants (NPPs), the IAEA safety guide SSG-30 dealing with the safety classification of structures,
systems and components in NPPs, the IAEA safety guide SSG-39 dealing with the design of
instrumentation and control systems for NPPs, the IAEA safety guide SSG-34 dealing with the
design of electrical power systems for NPPs and the implementing guide NSS17 for computer
security at nuclear facilities. The safety and security terminology and definitions used by
SC 45A standards are consistent with those used by the IAEA.
IEC 61513 and IEC 63046 have adopted a presentation format similar to the basic safety
publication IEC 61508 with an overall life-cycle framework and a system life-cycle framework.
Regarding nuclear safety, IEC 61513 and IEC 63046 provide the interpretation of the general
requirements of IEC 61508-1, IEC 61508-2 and IEC 61508-4, for the nuclear application sector.
In this framework IEC 60880, IEC 62138 and IEC 62566 correspond to IEC 61508-3 for the
nuclear application sector. IEC 61513 and IEC 63046 refer to ISO as well as to IAEA GS-R-3
and IAEA GS-G-3.1 and IAEA GS-G-3.5 for topics related to quality assurance (QA). At level 2,
regarding nuclear security, IEC 62645 is the entry document for the IEC/SC 45A security
standards. It builds upon the valid high level principles and main concepts of the generic
security standards, in particular ISO/IEC 27001 and ISO/IEC 27002; it adapts them and
completes them to fit the nuclear context and coordinates with the IEC 62443 series. At level 2,
regarding control rooms, IEC 60964 is the entry document for the IEC/SC 45A control rooms
standards and IEC 62342 is the entry document for the IEC/SC 45A ageing management
standards.
NOTE 1 It is assumed that for the design of I&C systems in NPPs that implement conventional safety functions (e.g.
to address worker safety, asset protection, chemical hazards, process energy hazards) international or national
standards would be applied.
NOTE 2 The IEC/SC 45A domain was extended in 2013 to cover electrical systems. In 2014 and 2015 discussions
were held in IEC/SC 45A to decide how and where general requirements for the design of electrical systems were to
be considered. IEC/SC 45A experts recommended that an independent standar
...
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