07-30175155-DC.pdf
a Date: 17 December 2007 Origin: International Latest date for receipt of comments: 31 March 2008 Project no.: 2004/02101 Responsible committee: NCE/8 Reactor instrumentation Interested committees: Title: IEC 60951-4 Nuclear Power Plants - Instrumentation important to safety - Radiation monitoring for accident and post accident conditions Part 4: Equipment for continuous in-line or on-line monitoring of radioactivity in process stream Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 March 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email ordersbsi-global.com. British, International and foreign standards are also available from BSI Customer Services. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-global.com. Direct tel: 020 7963 5750 Responsible Committee Secretary: Mr D F Crawley (BSI) E-mail: lexnetbtinternet.com Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30175155 DC Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:37 GMT+00:00 2008, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent standard. If no comments are received to the contrary, then the UK will approve this draft. There is a high probability that this text could be adopted by CENELEC as a reference document for harmonization or as a European Standard. Recipients of this draft are requested to comment on the text bearing in mind this possibility. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. Comments should be compatible with Version 6.0 or Version 97 of Microsoft® Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as given in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/www.bsi-global.com/en/Standards-and-Publications/Current-work/DPCs/ Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. 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Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:37 GMT+00:00 2008, Uncontrolled Copy, (c) BSI FORM CDV (IEC) 2005-09-23 45A/680/CDV COMMITTEE DRAFT FOR VOTE (CDV) PROJET DE COMITÉ POUR VOTE (CDV) Project number IEC 60951-4 Ed.2 Numéro de projet IEC/TC or SC: 45A CEI/CE ou SC: Secretariat / Secrétariat France Submitted for parallel voting in CENELEC Soumis au vote parallèle au CENELEC Date of circulation Date de diffusion 2007-12-14 Closing date for voting (Voting mandatory for P-members) Date de clôture du vote (Vote obligatoire pour les membres (P) 2008-05-16 Also of interest to the following committees Intéresse également les comités suivants 45B Supersedes document Remplace le document 45A/611/CD - 45A/635A/CC Functions concerned Fonctions concernées Safety Sécurité EMC CEM Environment Environnement Quality assurance Assurance qualité CE DOCUMENT EST TOUJOURS À L'ÉTUDE ET SUSCEPTIBLE DE MODIFICATION. IL NE PEUT SERVIR DE RÉFÉRENCE. LES RÉCIPIENDAIRES DU PRÉSENT DOCUMENT SONT INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS, LA NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À FOURNIR UNE DOCUMENTATION EXPLICATIVE. THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE. IT SHOULD NOT BE USED FOR REFERENCE PURPOSES. RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. Title : Nuclear Power Plants - Instrumentation important to safety - Radiation monitoring for accident and post accident conditions - Part 4: Equipment for continuous in-line or on-line monitoring of radioactivity in process stream Titre : Centrales nucléaires de puissance - Instrumentation importante pour la sûreté - Système de surveillance des rayonnements pour les conditions accidentelles et post accidentelles - Partie 4 : Ensemble pour la surveillance des rayonnements interne ou externe au fluide de procédé Introductory note The attention of the National Committees is drawn to the fact that the circulation of this CDV will end after the SC 45A meeting to be held in London in April 2008. In order to achieve progress on this project the National Committees are encouraged to prepare their comments before this meeting and to pass them to their national experts attending it, so hat they can be discussed at the meeting. This CDV is circulated as an English only document in agreement with the French national committee; the French version of this document will be made available at a later date. Note d'introduction, Lattention des Comités Nationaux est attirée sur le fait que la diffusion de ce CDV se termine après la réunion du SC 45A qui est prévue de se tenir à Londres en avril 2008. Afin de progresser sur ce projet, les Comités Nationaux sont encouragés à préparer leurs commentaires et à les remettre à leurs experts participant à la réunion, pour que ceux-ci y soient discutés. Ce CDV est diffusé en anglais seulement en accord avec le comité national français ; la version française de ce document sera diffusée à une date ultérieure. Copyright © 2007 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You may not copy or “mirror“ the file or printed version of the document, or any part of it, for any other purpose without permission in writing from IEC. Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:37 GMT+00:00 2008, Uncontrolled Copy, (c) BSI CDV1 © IEC 60951-4 Ed. 2.0 :2007 2 45A/680/CDV CONTENTS 1 Scope.7 2 References.7 3 Terms and definitions .7 4 Design principles8 4.1 Basic requirements related to functions.8 4.2 Range of measurement .8 4.3 In-line detectors mechanical features.8 4.3.1 General requirements8 4.3.2 Pressure-containing parts9 4.3.3 Materials .9 4.3.4 Shop inspection and tests9 5 Functional Testing10 5.1 Performance characteristicsError! Bookmark not defined. 5.2 Environmental performance test 10 5.2.1 Stability of performances with variation of ambient and stream conditions10 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:37 GMT+00:00 2008, Uncontrolled Copy, (c) BSI CDV1 © IEC 60951-4 Ed. 2.0 :2007 3 45A/680/CDV INTERNATIONAL ELECTROTECHNICAL COMMISSION _ TITLE Part X: 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 patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC XXX has been prepared by subcommittee XX: TITLE, of IEC technical committee XX: The text of this standard is based on the following documents: FDIS Report on voting XX/XX/FDIS XX/XX/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:37 GMT+00:00 2008, Uncontrolled Copy, (c) BSI CDV1 © IEC 60951-4 Ed. 2.0 :2007 4 45A/680/CDV The committee has decided that the contents of this publication will remain unchanged until the maintenance result date1) indicated on the IEC web site under “http:/webstore.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. 1) The National Committees are requested to note that for this publication the maintenance result date is .2015. Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:37 GMT+00:00 2008, Uncontrolled Copy, (c) BSI CDV1 © IEC 60951-4 Ed. 2.0 :2007 5 45A/680/CDV INTRODUCTION a) Technical background, main issues and organisation of the Standard This IEC standard specifically focuses on radiation monitoring systems used for accident and post accident operations This standard is intended for use by purchasers in developing specifications for their plant- specific radiation monitoring systems and by manufacturers to identify needed product characteristics when developing systems for accident monitoring conditions. Some specific instrument characteristics such as measurement range, required energy response, and ambient environment requirements will depend upon the specific application. In such cases guidance is provided on determining the specific requirements, but specific requirements themselves are not stated except as typical examples given in informative annexes. This standard is one in a series of standards covering post accident radiation monitors important to safety. The full series is comprised of the following standards. IEC 60951-1 General requirements. IEC 60951-2 Equipment for continuous off-line monitoring of radioactivity in gaseous effluents and ventilation air IEC 60951-3 Equipment for continuous high range area gamma monitoring IEC 60951-4 Equipment for continuous in-line or on-line monitoring of radioactivity in process stream b) Situation of the current Standard in the structure of the IEC SC45A
