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EN IEC 60709:2019

(Main)

Nuclear power plants - Instrumentation, control and electrical power systems important to safety - Separation

Nuclear power plants - Instrumentation, control and electrical power systems important to safety - Separation

See the scope of the revised IEC 60709 in 45A/1113/CDV that was unchanged for the preparation of the proposal of FDIS to be circulated in parallel in CENELEC.

Kernkraftwerke - Leittechnik und elektrische Energieversorgungssysteme mit sicherheitstechnischer Bedeutung - Physikalische und elektrische Trennung

Centrales nucléaires de puissance - Systèmes d'instrumentation, de contrôle-commande et d'alimentation électrique importants pour la sûreté - Séparation

L'IEC 60709:2018 est applicable aux systèmes d’instrumentation et de contrôle-commande (I&C) des centrales nucléaires de puissance ainsi qu’aux systèmes et équipements électriques, dont il est exigé que les fonctions soient indépendantes en raison de leur contribution à:  
un groupe de sûreté redondant ou varié;
différents niveaux de défense en profondeur;
différentes classes de sûreté et avec les systèmes non classés (NC).  Cette norme est aussi applicable aux installations temporaires qui font partie de ces systèmes d’I&C et électriques importants pour la sûreté (par exemple, les équipements auxiliaires pour les essais de mise en service et l’expérimentation ou pour les systèmes mobiles d’alimentation électrique). Cette nouvelle édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:  
intégration d’exigences relatives au principe de séparation dans les systèmes électriques importants pour la sûreté;
définition de critères de séparation pour les systèmes d’I&C et électriques de manière générale;
mise en cohérence de la norme avec les nouvelles révisions des documents de l’AIEA et extension du domaine d’application pour inclure de nouveaux aspects de separation.

Jedrske elektrarne - Merilna, nadzorna in elektroenergetska oprema za zagotavljanje varnosti - Ločevanje (IEC 60709:2018)

Ta dokument se uporablja za merilno, nadzorno in elektroenergetsko opremo ter sisteme v jedrskih elektrarnah, katerih funkcije morajo biti neodvisne zaradi prispevka k:
• redundantni ali raznoliki varnostni skupini;
• različni zaščiti v globinskih nivojih;
• različnim varnostnim razredom in tudi nerazvrščenim (NC) sistemom.
Uporablja se tudi za začasne inštalacije, ki so del merilnih, nadzornih in elektroenergetskih sistemov, pomembnih za varnost (na primer pomožna oprema za zagonske preskuse in poskuse ali mobilni napajalni sistemi). Točka 7 je namenjena predvsem za električno izolacijo, točka 8 pa kabliranju in razporeditvi merilnih, nadzornih in elektroenergetskih sistemov, pomembnih za varnost.
Ta dokument se uporablja za merilne, nadzorne in elektroenergetske sisteme novih jedrskih elektrarn ter za te sisteme v obstoječih elektrarnah, ki jih je treba nadgraditi ali vgraditi. Za obstoječe elektrarne glej 1.2 in 5.4.
Če neodvisnost zahtevajo splošni varnostni standardi, kot so varnostni priročniki IAEA, IEC 61513 (za merilne in nadzorne sisteme), IEC 63046 (za elektroenergetske sisteme) ter druge omejitve projekta, je mogoče to neodvisnost doseči s fizično ločitvijo in električno izolacijo sistemov ter njihove opreme, ki opravljajo varnostne funkcije. Ta dokument opredeljuje potrebne ocene in tehnične zahteve, ki jih je treba izpolnjevati za merilne, nadzorne in elektroenergetske sisteme, opremo ali kable, ki jih je treba ločiti. Na ta način se ustrezno fizično loči in električno izolira redundantne razdelke sistema ter sisteme višjega in nižjega razreda. Ločevanje je potrebno za preprečitev ali zmanjšanje negativnega vpliva na varnost pri napakah in okvarah, ki bi se lahko razširile ali vplivale na več delov sistema ali več sistemov.
Zahteve za neodvisnost funkcij in z njimi povezanih sistemov ter opreme so običajno podrobno opredeljene v projektni dokumentaciji; metoda določanja in opredelitve teh zahtev ni predmet tega dokumenta.
V skladu z zahtevo 21 IAEA SSR-2/1 so sredstva ločevanja fizična ločitev, električna izolacija, funkcionalna neodvisnost in neodvisnost komunikacije. V tem dokumentu se obravnava fizična ločitev in električna izolacija. Funkcionalna neodvisnost in neodvisnost komunikacije v tem dokumentu nista upoštevani. Podrobnosti o funkcionalni neodvisnosti, neodvisnosti od nadzornih sistemov in neodvisnosti komunikacije so v dodatku D.

General Information

Status
Published
Publication Date
27-Jun-2019
Withdrawal Date
16-Jun-2022
ICS
27.120.20 - Nuclear power plants. Safety
Technical Committee
CLC/TC 45AX - Nuclear power plants
Drafting Committee
CLC/TC 45AX - Nuclear power plants
Current Stage
6060 - Document made available - Publishing
Start Date
28-Jun-2019
Due Date
18-Feb-2021
Completion Date
28-Jun-2019
Ref Project
SIST EN IEC 60709:2019 - Nuclear power plants - Instrumentation, control and electrical power systems important to safety - Separation (IEC 60709:2018)

Relations

Replaces
EN 60709:2010 - Nuclear power plants - Instrumentation and control systems important to safety - Separation
Effective Date
02-Jul-2019

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SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN 60709:2010
Jedrske elektrarne - Merilna, nadzorna in elektroenergetska oprema za
zagotavljanje varnosti - Ločevanje (IEC 60709:2018)
Nuclear power plants - Instrumentation, control and electrical power systems important
to safety - Separation (IEC 60709:2018)
Kernkraftwerke - Leittechnik und elektrische Energieversorgungssysteme mit
sicherheitstechnischer Bedeutung - Physikalische und elektrische Trennung (IEC
60709:2018)
Centrales nucléaires de puissance - Systèmes d'instrumentation, de contrôle-commande
et d'alimentation électrique importants pour la sûreté - Séparation (IEC 60709:2018)
Ta slovenski standard je istoveten z: EN IEC 60709:2019
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 60709

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 27.120.20 Supersedes EN 60709:2010
English Version
Nuclear power plants - Instrumentation, control and electrical
power systems important to safety - Separation
(IEC 60709:2018)
Centrales nucléaires de puissance - Systèmes Kernkraftwerke - Leittechnik und elektrische
d'instrumentation, de contrôle-commande et d'alimentation Energieversorgungssysteme mit sicherheitstechnischer
électrique importants pour la sûreté - Séparation Bedeutung - Physikalische und elektrische Trennung
(IEC 60709:2018) (IEC 60709:2018)
This European Standard was approved by CENELEC on 2019-06-17. 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60709:2019 E
European foreword
This document (EN IEC 60709:2019) consists of the text of IEC 60709:2018 prepared by IEC/SC
45A: "Instrumentation, control and electrical power systems of nuclear facilities", of IEC/TC 45:
"Nuclear instrumentation".
The following dates are fixed:
• latest date by which this document has to be (dop) 2020-06-17
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) 2022-06-17
conflicting with this document have to be
withdrawn
This document supersedes EN 60709:2010.
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.
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.
Endorsement notice
The text of the International Standard IEC 60709:2018 was approved by CENELEC as a European
Standard without any modification.

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 60071 series Insulation co-ordination EN 60071 series
IEC 60332 series Tests on electric and optical fibre cables EN 60332 series
under fire conditions
IEC 60364-4-41 -  Low-voltage electrical installations - Part 4-HD 60364-4-41 -
41: Protection for safety - Protection
against electric shock
IEC 60364-5-52 -  Low-voltage electrical installations - Part 5-HD 60364-5-52 -
52: Selection and erection of electrical
equipment - Wiring systems
IEC 60364-5-56 -  Low-voltage electrical installations - Part 5-- -
56: Selection and erection of electrical
equipment - Safety services
IEC 60909 series Short-circuit current calculation in three- - -
phase a.c. systems
IEC 60964 -  Nuclear power plants - Control rooms - - -
Design
IEC 61000 series Electromagnetic compatibility (EMC) - -
IEC 61226 -  Nuclear power plants - Instrumentation EN 61226 -
and control important to safety -
Classification of instrumentation and
control functions
IEC 61439-1 -  Low-voltage switchgear and controlgear EN 61439-1 -
assemblies - Part 1: General rules
IEC 61500 -  Nuclear power plants - Instrumentation - -
and control important to safety - Data
communication in systems performing
category A functions
IEC 61513 2011 Nuclear power plants - Instrumentation EN 61513 2013
and control important to safety - General
requirements for systems
IEC 61660 series Short-circuit currents in d.c. auxiliary EN 61660 series
installations in power plants and
substations
IEC 62003 -  Nuclear power plants - Instrumentation - -
and control important to safety -
Requirements for electromagnetic
compatibility testing
IEC 62808 -  Nuclear power plants - Instrumentation EN 62808 -
and control systems important to safety -
Design and qualification of isolation
devices
IEC/TR 62096 -  Nuclear power plants - Instrumentation - -
and control - Guidance for the decision on
modernization
IEC 63046 -  Nuclear power plants - Electrical systems - - -
General requirements
IAEA Safety 2016 Safety of Nuclear Power Plant: Design
Standard Series No.
SSR-2/1
IAEA Safety Guide - Safety classification of structures, systems
SSG-30 and components in Nuclear Power Plants
IAEA Safety Guide - Design of electrical power systems in
SSG-34 Nuclear Power Plants
IAEA Safety Guide 2016 Design of instrumentation and control
SSG-39 systems in Nuclear Power Plants

To be published.
IEC 60709 ®
Edition 3.0 2018-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Nuclear power plants – Instrumentation, control and electrical power systems

important to safety – Separation

Centrales nucléaires de puissance – Systèmes d’instrumentation, de contrôle-

commande et d'alimentation électrique importants pour la sûreté – Séparation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.120.20 ISBN 978-2-8322-5582-7

– 2 – IEC 60709:2018  IEC 2018
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 10
1.1 General . 10
1.2 Application: new and pre-existing plants . 10
2 Normative references . 11
3 Terms and definitions . 12
4 Abbreviated terms . 15
5 Principles and requirements for separation . 16
5.1 Principles . 16
5.1.1 General . 16
5.1.2 Separation reasoning and boundaries . 16
5.1.3 Plant safety principles and requirements . 17
5.2 Safety class separation requirements . 17
5.3 Associated circuits . 18
5.3.1 General . 18
5.3.2 Criteria . 19
5.4 Separation issues at existing plants . 20
5.4.1 General . 20
5.4.2 Criteria . 20
6 Separation design basis . 20
6.1 Design inputs . 20
6.2 Environmental conditions and hazards . 21
6.2.1 General . 21
6.2.2 Environmental conditions . 21
6.2.3 External hazards. 21
6.2.4 Internal hazards . 21
6.2.5 Fire protection . 22
6.3 EMI/EMC . 22
6.4 Electrical fault . 22
6.5 Requirements from non-nuclear technical standards . 22
6.6 Requirements from special operating conditions . 22
7 Electrical isolation . 23
7.1 Principles . 23
7.1.1 General . 23
7.1.2 Overvoltage barrier . 23
7.1.3 Short circuit / Overcurrent protection . 23
7.1.4 Electrical nonreactive (retroaction free) . 24
7.1.5 Galvanic isolation (electrical insulation) . 24
7.2 Isolation devices . 24
7.2.1 General . 24
7.2.2 Isolation characteristics . 25
7.2.3 Actuation priority . 25
8 Physical separation . 26
8.1 Principles . 26

SIST E
...

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