1、 IEC/TR 62096 Edition 2.0 2009-03 TECHNICAL REPORT RAPPORT TECHNIQUE Nuclear power plants Instrumentation and control important to safety Guidance for the decision on modernization Centrales nuclaires de puissance Instrumentation et contrle-commande importants pour la sret Guide pour dcider dune mod
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16、isitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC/TR 62096 Edition 2.0 2009-03 TECHNICAL REPORT RAPPORT TECHNIQUE Nuclear power plants Instrumentation and control important to safety Guidance for the decision on modernization Central
17、es nuclaires de puissance Instrumentation et contrle-commande importants pour la sret Guide pour dcider dune modernisation INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XA ICS 27.120.20 PRICE CODE CODE PRIX ISBN 2-8318-1034-0 Registered trademark of the Interna
18、tional Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 TR 62096 IEC:2009 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope and object8 2 Normative references .8 3 Terms and definitions .9 4 Abbreviations .11 5 Motivation for modernization.12 5.1 General .12 5.2 E
19、conomic motivating factors12 5.2.1 General .12 5.2.2 Cost reductions .12 5.2.3 Revenue13 5.2.4 Economically motivated modernization 13 5.3 Safety motivating factors .14 5.4 Summary of motivations for modernization 14 6 Modernization decision overview 14 6.1 I any IEC National Committee interested in
20、 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 cond
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27、 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.
28、The main task of IEC technical committees is to prepare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of t
29、he art“. IEC 62096, which is a technical report, has been prepared by subcommittee 45A: Instrumentation and control of nuclear facilities, of IEC technical committee 45: Nuclear instrumentation. This second edition cancels and replaces the first edition published in 2002. This edition includes the f
30、ollowing significant technical changes with respect to the previous edition: update on the format to align with the current IEC/ISO directives on style of documents; update on references, taking into account Standards published since the first edition; update on the terminology; TR 62096 IEC:2009 5
31、incorporation of a number of clarifications proposed by National Committees. The text of this technical report is based on the following documents: Enquiry draft Report on voting 45A/711/DTR 45A/726/RVC Full information on the voting for the approval of this technical report can be found in the repo
32、rt on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.
33、iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 6 TR 62096 IEC:2009 INTRODUCTION a) Technical background, main issues and organisation of this Technical Report Normal procedures for eval
34、uation of plant safety, operations and maintenance provide information about potential needs for renewal or upgrades. After many years of operation, the Instrumentation & Control (I&C) systems may no longer fulfil actual or anticipated safety requirements, may be obsolete or unreliable, or may no lo
35、nger be fit for required lifetime extensions. In such cases, modernization provides the way forward to adapt the I&C systems to meet the requirements or to deal with the problems and costs caused by the obsolescence or aging of the equipment. During modernization, the benefits offered by modern I&C
36、equipment can be evaluated. It is intended that this Technical Report be used by operators of NPPs (utilities), systems evaluators and by licensors. b) Situation of the current Technical Report in the structure of the IEC SC 45A standard series IEC 62096, as a Technical Report, is the fourth level I
37、EC SC 45A document tackling the issue of guidance for decision for modernisation. For more details on the structure of the IEC SC 45A standard series, see d) of this introduction. c) Recommendations and limitations regarding the application of this Technical Report There are no particular recommenda
38、tions, neither limitations regarding the use of this Technical Report. 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 document of the IEC SC 45A standard series is IEC 61513. It provide
39、s general requirements for I&C systems and equipment that are used to perform functions important to safety in NPPs. IEC 61513 structures the IEC SC 45A standard series. IEC 61513 refers directly to other IEC SC 45A standards for general topics related to categorization of functions and classificati
40、on of systems, qualification, separation of systems, defence against common cause failure, software aspects of computer-based systems, hardware aspects of computer-based systems, and control room design. The standards referenced directly at this second level should be considered together with IEC 61
41、513 as a consistent document set. At a third level, IEC SC 45A standards not directly referenced by IEC 61513 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 use
42、d on their own. A fourth level extending the IEC SC 45A standard series, corresponds to the technical reports which are not normative. IEC 61513 has adopted a presentation format similar to the basic safety publication IEC 61508 with an overall safety life-cycle framework and a system life-cycle framework and provides an interpretation of the general requirements of IEC 61508-1, IEC 61508-2 and IEC 61508-4, for the nuclear application sector. Compliance with IEC 61513 will facilitate
