EN 60709:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kernkraftwerke - Leittechnische Systeme mit sicherheitstechnischer Bedeutung - Physikalische und elektrische Trennung (IEC 60709:2004)Centrales nucléaires de puissance - Systèmes d'instrumentation et de contrôle commande importants pour la sûreté - Séparation (CEI 60709:2004)Nuclear power plants - Instrumentation and control systems important to safety - Separation (IEC 60709:2004)27.120.20Jedrske elektrarne. VarnostNuclear power plants. SafetyICS:Ta slovenski standard je istoveten z:EN 60709:2010SIST EN 60709:2010en01-september-2010SIST EN 60709:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD EN 60709 NORME EUROPÉENNE
EUROPÄISCHE NORM May 2010
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2010 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60709:2010 E
ICS 27.120.20
English version
Nuclear power plants -
Instrumentation and control systems important to safety -
Separation (IEC 60709:2004)
Centrales nucléaires de puissance -
Systèmes d'instrumentation et de contrôle commande importants pour la sûreté -
Séparation (CEI 60709:2004)
Kernkraftwerke -
Leittechnische Systeme
mit sicherheitstechnischer Bedeutung -
Physikalische und elektrische Trennung (IEC 60709:2004)
This European Standard was approved by CENELEC on 2010-05-01. 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 Central Secretariat 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 Central Secretariat 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 60709:2010

(dop)
2011-05-01 – latest date by which the national standards conflicting with the EN have to be withdrawn
(dow)
2013-05-01 Annex ZA has been added by CENELEC. 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 measures in the subject-matter covered by this European Standard.” __________ Endorsement notice The text of the International Standard IEC 60709:2004 was approved by CENELEC as a European Standard without any modification. SIST EN 60709:2010

– 3 – EN 60709:2010 Annex ZA (normative)
Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application 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
Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60332 Series Tests on electric and optical fibre cables under fire conditions
EN 60332 Series IEC 60964 - Design for control rooms of nuclear power plants - - IEC 61000 Series Electromagnetic compatibility (EMC)
EN 61000 Series IEC/TS 61000-6-5 - Electromagnetic compatibilty (EMC) -
Part 6-5: Generic standards - Immunity for power station and substation environments - - IEC 61226 - Nuclear power plants - Instrumentation and control systems important to safety - Classification
- - IEC 61513 - Nuclear power plants - Instrumentation and control for systems important to safety - General requirements for systems - - IEC/TR 62096 - Nuclear power plants - Instrumentation and control - Guidance for the decision on modernization - - IAEA safety guide NS-G-1.3 - Instrumentation and control systems important to safety in nuclear power plants - -
NORME INTERNATIONALECEIIEC INTERNATIONAL STANDARD 60709Deuxième éditionSecond edition2004-11 Centrales nucléaires de puissance – Systèmes d'instrumentation et de contrôle commande importants
pour la sûreté – Séparation
Nuclear power plants – Instrumentation and control systems important to safety – Separation
Pour prix, voir catalogue en vigueur For price, see current catalogue IEC 2004
Droits de reproduction réservés

Copyright - all rights reserved Aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission,
3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch
Web: www.iec.ch CODE PRIX PRICE CODE R Commission Electrotechnique InternationaleInternational Electrotechnical CommissionSIST EN 60709:2010

60709  IEC:2004 – 3 – CONTENTS FOREWORD.5 INTRODUCTION.9 1 Scope.13 2 Normative references.13 3 Terms and definitions.15 4 General principles for separation within I&C systems important to safety.17 4.1 General.17 4.2 Design errors.19 4.3 I&C system failure events.19 4.3.1 Single random failure.19 4.3.2 Multiple failures from a single common cause.19 4.4 Plant failure events.21 4.4.1 Environmental conditions.21 4.4.2 Electromagnetic interference.21 4.4.3 Failure of plant systems, equipment or structures.21 4.4.4 Operator error.21 4.5 External failure events.21 4.5.1 Natural events.21 4.5.2 External man-made causes.23 4.6 Special operating conditions.23 4.7 Separation issues at existing plants.23 5 Design basis.25 5.1 Fire protection.25 5.2 Environmental conditions during and after accidents.25 5.3 Isolation devices.25 5.3.1 General.25 5.3.2 Isolation characteristics.27 5.3.3 Actuation priority.27 5.4 Independence from control systems.29 6 Requirements for cabling separation.31 6.1 General requirement.31 6.2 Separation.31 6.2.1 Separation of redundant cables inside the I&C system important to safety.31 6.2.2 Lesser separation distances.31 6.2.3 Associated circuits.33 6.2.4 Separation of system cables of different safety categories.35 6.2.5 Separation of signal cables from power cables.35 6.2.6 Separation of cables from tubes or pipes.35 6.2.7 General routing considerations.35 6.2.8 Control room cabinets, desks, panels and related cables.35 6.3 Thermal and physical protection.39 6.4 Fire protection.39 6.5 Identification.39
60709  IEC:2004 – 5 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
NUCLEAR POWER PLANTS –
INSTRUMENTATION AND CONTROL SYSTEMS
IMPORTANT TO SAFETY – SEPARATION
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 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 pat
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