EN IEC 60987:2021

SLOVENSKI STANDARD
01-november-2021
Nadomešča:
SIST EN 60987:2015
Jedrske elektrarne - Merilna in nadzorna oprema za zagotavljanje varnosti -
Zahteve za strojno opremo (IEC 60987:2021)
Nuclear power plants - Instrumentation and control important to safety - Hardware
requirements (IEC 60987:2021)
Kernkraftwerke - Leittechnische Systeme mit sicherheitstechnischer Bedeutung -
Hardware-Anforderungen (IEC 60987:2021)
Centrales nucléaires de puissance - Systèmes d'instrumentation et de contrôle-
commande importants pour la sûreté - Exigences applicables au matériel (IEC
60987:2021)
Ta slovenski standard je istoveten z: EN IEC 60987:2021
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 60987

NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 27.120.20 Supersedes EN 60987:2015 and all of its amendments
and corrigenda (if any)
English Version
Nuclear power plants - Instrumentation and control important to
safety - Hardware design requirements for computer-based
systems
(IEC 60987:2021)
Centrales nucléaires de puissance - Systèmes Kernkraftwerke - Leittechnische Systeme mit
d'instrumentation et de contrôle-commande importants pour sicherheitstechnischer Bedeutung - Hardware-
la sûreté - Exigences applicables au matériel Anforderungen
(IEC 60987:2021) (IEC 60987:2021)
This European Standard was approved by CENELEC on 2021-08-16. 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 60987:2021 E
European foreword
This document (EN IEC 60987:2021) consists of the text of IEC 60987:2021 prepared by IEC/TC 45
"Nuclear instrumentation".
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-08-16
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-08-16
document have to be withdrawn
This document supersedes EN 60987:2015 and all of its amendments and corrigenda (if any).
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.”
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60987:2021 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 60671:2007 NOTE Harmonized as EN 60671:2011 (not modified)
IEC 61226 NOTE Harmonized as EN IEC 61226
IEC 62340:2007 NOTE Harmonized as EN 62340:2010 (not modified)
IEC 62645 NOTE Harmonized as EN IEC 62645
IEC 63046:2020 NOTE Harmonized as EN IEC 63046:2021 (not modified)
ISO 9001 NOTE Harmonized as EN ISO 9001

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 60812 -  Failure modes and effects analysis (FMEA EN IEC 60812 -
and FMECA)
IEC 60880 -  Nuclear power plants - Instrumentation and EN 60880 -
control systems important to safety -
Software aspects for computer-based
systems performing category A functions
IEC 61000-1 series Electromagnetic compatibility (EMC) - PartE N 61000-1 series
1-2: General - Methodology for the
achievement of functional safety of
electrical and electronic systems including
equipment with regard to electromagnetic
phenomena
IEC 61025 -  Fault tree analysis (FTA) EN 61025 -
IEC 61513 2011 Nuclear power plants - Instrumentation and EN 61513 2013
control important to safety - General
requirements for systems
IEC 61709 -  Electric components - Reliability - EN 61709 -
Reference conditions for failure rates and
stress models for conversion
IEC 62003 -  Nuclear power plants - Instrumentation, EN IEC 62003 -
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
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
Publication Year Title EN/HD Year
IEC 62566-2 -  Nuclear power plants - Instrumentation and EN IEC 62566-2 -
control systems important to safety -
Development of HDL-programmed
integrated circuits - Part 2: HDL-
programmed integrated circuits for systems
performing category B or C functions
ISO 2859-0 -  Sampling procedures for inspection by - -
attributes_- Part_0: Introduction to the
ISO_2859 attribute sampling system
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 60987 ®
Edition 3.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Nuclear power plants – Instrumentation and control important to safety –

Hardware requirements
Centrales nucléaires de puissance – Systèmes d’instrumentation et de contrôle-

commande importants pour la sûreté – Exigences applicables au matériel

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.120.20 ISBN 978-2-8322-9319-5

– 2 – IEC 60987:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Symbols and abbreviated terms . 17
5 Hardware safety lifecycle . 17
5.1 General . 17
5.2 Hardware safety lifecycle for class 1 and class 2 . 20
5.2.1 Project structure for class 1 and class 2 . 20
5.2.2 Quality management for class 1 and class 2 . 20
5.2.3 Verification of hardware for class 1 and class 2 . 21
5.3 Hardware safety lifecycle for class 3 . 23
5.3.1 Project structure and quality management for class 3 . 23
5.3.2 Verification of hardware for class 3 . 24
6 Hardware aspects of system requirements specification . 24
6.1 Hardware aspects of system requirements specification for class 1 and
class 2 . 24
6.1.1 General requirements for class 1 and class 2 . 24
6.1.2 Functional and performance requirements for class 1 and class 2 . 25
6.1.3 Reliability requirements for class 1 and class 2 . 26
6.1.4 Environmental conditions requirements for class 1 and class 2 . 27
6.1.5 Manufacturing requirements for class 1 and class 2 . 27
6.1.6 Documentation requirements for class 1 and class 2 . 27
6.2 Hardware aspects of system requirements specification for class 3. 27
6.2.1 General requirements for class 3 . 27
6.2.2 Reliability for class 3 . 27
6.2.3 Environmental conditions requirements for class 3 . 28
6.2.4 Documentation requirements for class 3 . 28
7 Selection of pre-existing components . 28
7.1 Selection of pre-existing components for class 1 and class 2 . 28
7.2 Selection of pre-existing components for class 3 . 29
8 Hardware aspects of system detailed design and implementation . 29
8.1 Hardware aspects of system detailed design and implementation for class 1
and class 2 . 29
8.1.1 General requirement for class 1 and class 2 . 29
8.1.2 Design activities for class 1 and class 2 . 30
8.1.3 Reliability for class 1 and class 2 . 30
8.1.4 Maintenance for class 1 and class 2 . 31
8.1.5 Power failure for class 1 and class 2 . 32
8.1.6 Design documentation for class 1 and class 2 . 32
8.2 Hardware aspects of system detailed design and implementation for class 3 . 33
8.2.1 General requirement for class 3 . 33
8.2.2 Reliability for class 3 . 33
8.2.3 Maintenance for class 3 . 33
9 Equipment (component) manufacturing . 33

IEC 60987:2021 © IEC 2021 – 3 –
9.1 Equipment (component) manufacturing for class 1 and class 2 . 33
9.1.1 Manufacturing quality management for class 1 and class 2 . 33
9.1.2 Training of personnel for class 1 and class 2 .
...