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SLOVENSKI STANDARD
01-julij-2021
Jedrske elektrarne - Elektroenergetski sistemi - Splošne zahteve (IEC 63046:2020)
Nuclear power plants - Electrical power system - General requirements (IEC
63046:2020)
Kernkraftwerke - Elektrische Stromversorgungssysteme - Allgemeine Anforderungen
(IEC 63046:2020)
Centrales nucléaires de puissance - Système d'alimentation électrique - Exigences
générales (IEC 63046:2020)
Ta slovenski standard je istoveten z: EN IEC 63046:2021
ICS:
27.120.20 Jedrske elektrarne. Varnost Nuclear power plants. Safety
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 63046
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2021
ICS 27.120.20
English Version
Nuclear power plants - Electrical power system - General
requirements
(IEC 63046:2020)
Centrales nucléaires de puissance - Système d'alimentation Kernkraftwerke - Elektrische Stromversorgungssysteme -
électrique - Exigences générales Allgemeine Anforderungen
(IEC 63046:2020) (IEC 63046:2020)
This European Standard was approved by CENELEC on 2021-05-17. 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,
Turkey 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63046:2021 E
European foreword
The text of document 45A/1348/FDIS, future edition 1 of IEC 63046, prepared by SC 45A
"Instrumentation, control and electrical power systems of nuclear facilities" of IEC/TC 45 "Nuclear
instrumentation" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-02-17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-05-17
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. 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.
Endorsement notice
The text of the International Standard IEC 63046:2020 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 60364-5-52 NOTE Harmonized as HD 60364-5-52
IEC 60880 NOTE Harmonized as EN 60880
IEC 61508-1 NOTE Harmonized as EN 61508-1
IEC 61508-2 NOTE Harmonized as EN 61508-2
IEC 61508-3 NOTE Harmonized as EN 61508-3
IEC 61508-4 NOTE Harmonized as EN 61508-4
IEC 62003 NOTE Harmonized as EN IEC 62003
IEC 62040-3 NOTE Harmonized as EN 62040-3
IEC 62138 NOTE Harmonized as EN IEC 62138
IEC 62271-200 NOTE Harmonized as EN 62271-200
IEC 62305-1 NOTE Harmonized as EN 62305-1
IEC 62305-3 NOTE Harmonized as EN 62305-3
IEC 62305-4 NOTE Harmonized as EN 62305-4
IEC 62340 NOTE Harmonized as EN 62340
IEC 62566 NOTE Harmonized as EN 62566
IEC 62645 NOTE Harmonized as EN IEC 62645
ISO/IEC 27001 NOTE Harmonized as EN ISO/IEC 27001
ISO/IEC 27002 NOTE Harmonized as EN ISO/IEC 27002
ISO 9000 NOTE Harmonized as EN ISO 9000
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 Where 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 60038 (mod) 2009 IEC standard voltages EN 60038 2011
IEC 60671 - Nuclear power plants - Instrumentation and EN 60671 -
control systems important to safety -
Surveillance testing
IEC 60709 2018 Nuclear power plants - Instrumentation, EN IEC 60709 2019
control and electrical power systems
important to safety - Separation
IEC 60964 2018 Nuclear power plants - Control rooms - EN IEC 60964 2019
Design
+EN IEC
60964:2019/AC:201
9-08
IEC 61225 - Nuclear power plants - Instrumentation, EN IEC 61225 -
control and electrical power systems -
Requirements for static uninterruptible DC
and AC power supply systems
IEC 61226 - Nuclear power plants - Instrumentation and EN 61226 -
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 62671 - Nuclear power plants - Instrumentation and - -
control important to safety - Selection and
use of industrial digital devices of limited
functionality
IEC 62808 - Nuclear power plants - Instrumentation and EN 62808 -
control systems important to safety -
Design and qualification of isolation
devices
IEC 62855 2016 Nuclear power plants - Electrical power prEN IEC 62855 2021
systems - Electrical power systems
analysis
Publication Year Title EN/HD Year
IEC 62859 - Nuclear power plants - Instrumentation and EN 62859 -
control systems - Requirements for
coordinating safety and cybersecurity
ISO 9001 Quality management systems - EN ISO 9001 2015
Requirements
IEC/IEEE 60780-- Nuclear facilities - Electrical equipment EN 60780-323 -
323 important to safety - Qualification
IEC/IEEE 60980-- Nuclear facilities - Equipment important to EN IEC/IEEE-
344 safety - Seismic qualification 60980-344
IEC 63046
Edition 1.0 2020-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Nuclear power plants – Electrical power system – General requirements
Centrales nucléaires de puissance – Système d'alimentation électrique –
Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.120.20 ISBN 978-2-8322-8817-7
– 2 – IEC 63046:2020 © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 9
1.1 General . 9
1.2 Application: new and pre-existing plants . 11
1.3 Framework . 11
1.4 Interaction with level 2 standards . 11
2 Normative references . 13
3 Terms and definitions . 14
4 Abbreviated terms . 23
5 Overall Electrical Power System life cycle . 24
6 Architecture of Electrical Power System: identification of requirements. 25
6.1 Objectives . 25
6.2 Safety requirements applicable to the electrical architecture design . 26
6.2.1 Defence in Depth . 26
6.2.2 Application of Single Failure Criterion . 26
6.2.3 Management of the Common Cause Failure . 26
6.2.4 Loss Of Off-site Power conditions . 26
6.2.5 Station Black Out conditions . 27
6.2.6 Loss of Electrical Power conditions . 27
6.2.7 Application of internal and external Hazards . 27
6.2.8 Nuclear security requirements . 28
6.2.9 Classification requirements . 28
6.2.10 Probabilistic requirements . 28
6.3 Electrical requirements . 28
6.3.1 Requirements coordinated with the electric grid operator . 28
6.3.2 Electrical disturbances . 29
6.4 Functional performance requirements . 29
6.5 Maintenance requirements . 30
7 Design of the electrical architecture . 30
7.1 Objectives . 30
7.2 Safety design provision . 30
7.2.1 Defence in Depth in the Electrical Power System . 30
7.2.2 Single Failure in the Electrical Power System . 31
7.2.3 Common Cause Failure in the Electrical Power System . 31
7.2.4 Provisions for coping with Loss Of Off-site Power . 37
7.2.5 Provisions for coping with Station Black Out . 38
7.2.6 Provisions to avoid or reduce Loss of Electrical Power . 38
7.2.7 Classification consideration . 38
7.2.8 Provisions to achieve the reliability target for the Electrical Power System . 39
7.3 Electrical design provision . 40
7.3.1 General . 40
7.3.2 Coordination with the grid . 40
7.3.3 Design to achieve electrical requirements . 40
7.4 Functional and performance design provisions . 46
7.4.1 General . 46
IEC 63046:2020 © IEC 2020 – 3 –
7.4.2 Electrical Power System studies . 46
7.4.3 Design of the Interruptible Power Supply System . 49
7.4.4 Design of the Uninterruptible Power Supply System . 49
7.5 Maintenance .
...