BS-EN-60761-1-2004.pdf
BRITISH STANDARD BS EN 60761-1:2004 Incorporating Amendment No. 1 (renumbers the BS IEC as BS EN 60761-1:2004) Equipment for continuous monitoring of radioactivity in gaseous effluents Part 1: General requirements The European Standard EN 60761-1:2004 has the status of a British Standard. ICS 13.280 ? Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:12:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60761-1:2004 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 4 December 2002 © BSI 13 April 2005 ISBN 0 580 40886 8 National foreword This British Standard is the official English language version of EN 60761-1:2004. It is identical with IEC 60761-1:2002. The UK participation in its preparation was entrusted to Technical Committee NCE/2, Health physics instrumentation, which has the responsibility to: The CENELEC common modifications have been implemented at the appropriate places in the text. The start and finish of each common modification is indicated in the text by tags . A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 33 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 1542713 April 2005Renumbers BS IEC 60761-1:2002 as BS EN 60761-1:2004 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:12:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60761-1 NORME EUROPÉENNE EUROPÄISCHE NORM December 2004 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels © 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60761-1:2004 E ICS 13.280 English version Equipment for continuous monitoring radioactivity in gaseous effluents Part 1: General requirements (IEC 60761-1:2002, modified) Equipements de surveillance en continu de la radioactivité dans les effluents gazeux Partie 1: Exigences générales (CEI 60761-1:2002, modifiée) Einrichtungen zur kontinuierlichen Überwachung von Radioaktivität in gasförmigen Ableitungen Teil 1: Allgemeine Anforderungen (IEC 60761-1:2002, modifiziert) This European Standard was approved by CENELEC on 2004-11-01. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:12:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of the International Standard IEC 60761-1:2002, prepared by SC 45B, Radiation protection instrumentation, of IEC TC 45, Nuclear instrumentation, together with the common modifications prepared by the CENELEC BTTF 111-3 Instrumentation for ionizing radiation measurement and protection, was submitted to the formal vote and was approved by CENELEC as EN 60761-1 on 2004-11-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2005-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-11-01 Subclauses, notes and annexes that are additional to those in the IEC standard are prefixed with the letter Z. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 60761-1:2002 was approved by CENELEC as a European Standard with agreed common modifications. _ Page 2 EN 607611:2004 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:12:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CONTENTS 1 Scope and object4 2 Normative references4 3 Terms, definitions and units 5 4 Symbols and abbreviations .9 5 General requirements .9 6 Types of monitors .9 7 Sampling of the effluent 10 8 Collection of activity11 9 Measurement and indication characteristics 11 10 Reliability12 11 Flow-rate characteristics of a fractional sample of effluent stream .12 12 Alarms13 13 Indication facilities 13 14 Facilities for operational testing.14 15 Adjustment and maintenance facilities.14 16 Detection assembly or sampling and detection assembly.14 17 Control and measurement assembly .15 18 Ambient background shielding or compensation devices .15 19 Acoustic noise level of the assembly.15 20 Electromagnetic interference.16 21 Power supply16 22 General test procedures16 23 Tests performed under standard test conditions 17 24 Tests performed with variation of influence quantities17 25 Statistical fluctuations.17 26 Performance characteristics17 27 Electrical and mechanical characteristics 20 28 Environmental performance characteristics .23 29 Tests of the air circuit .25 30 Type test report and certificate27 31 Operation and maintenance manual27 Annex ZA (normative) Normative references to international publications with their corresponding European publications32 Table 1 Reference conditions and standard test conditions.28 Table 2 Tests performed under standard test conditions .29 Table 3 Tests performed with variation of influence quantities.30 Table 4 Tests of air circuit31 Page 3 EN 607611:2004 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:12:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EQUIPMENT FOR CONTINUOUS MONITORING OF RADIOACTIVITY IN GASEOUS EFFLUENTS Part 1: General requirements 1 Scope and object This part of IEC 60761 defines acceptable forms of such monitoring, provides some general guidance as to the possible range of measurement and capability of such equipment as may be envisaged, and indicates when and where its uses may be practicable. This standard is applicable to equipment for continuous monitoring of radioactivity in gaseous effluents during normal operations and during anticipated operational occurrences. This standard does not apply to equipment specifically for use in accident conditions. Such equipment may require additional capabilities. This standard is restricted to equipment for continuously monitoring radioactivity in gaseous effluent. It does not deal with sample extraction and laboratory analysis. The object of this standard is to lay down mandatory general requirements and give examples of acceptable methods for equipment for continuous monitoring of radioactivity in gaseous effluents. It specifies, for the equipment described above, the general characteristics, general test procedures, radiation, electrical, safety and environmental characteristics and the identification and certification of the equipment. If this equipment is part of a centralized system for continuous radiation monitoring in a nuclear facility, there may be additional requirements from other standards related to those systems. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 60761. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 60761 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60038:1983, IEC standard voltages IEC 60050(151):1978, International Electrotechnical Vocabulary (IEV) Chapter 151: Electrical and magnetic devices IEC 60050(393):1996, International Electrotechnical Vocabulary (IEV) Chapter 393: Nuclear instrumentation Physical phenomena and basic concepts IEC 60050(394):1995, International Electrotechnical Vocabulary (IEV) Chapter 394: Nuclear instrumentation Instruments Page 4 EN 607611:2004 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:12:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Text deleted IEC 60068-2-27:1987, Environmental testing Part 2: Tests Test Ea and guidance: Shock IEC 60181:1964, Index of electrical measuring apparatus used in connection with ionizing radiation IEC 60181A:1965, Index of electrical measuring apparatus used in connection with ionizing radiation First supplement IEC 60761 (all parts), Equipment for continuous monitoring of radioactivity in gaseous effluents IEC 61000-4-2, Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Electrostatic discharge immunity test IEC 61000-4-3, Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test IEC 61000-4-4, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques - Electrical fast transient/burst immunity test IEC 61000-4-5, Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement techniques - Surge immunity test IEC 61000-4-12, Electromagnetic compatibility (EMC) - Part 4-12: Testing and measurement techniques - Oscillatory waves immunity test ISO:1995, Guide to the expression of uncertainty in measurement ISO 2889:1975, General principles for sampling airborne radioactive materials ISO 10012-1:1992, Quality assurance requirements for measuring equipment Part 1: Metrological confirmation system for measuring equipment EN 55022:1994, Limits and Methods of Measurement of Radio Disturbance Characteristics of Information Technology Equipment 3 Terms, definitions and units For the purpose of this part of IEC 60761, the definitions concerning the detection and measurement of ionizing radiation and nuclear instrumentation given in IEC 60050(393), IEC 60050(394), IEC 60181 and IEC 60181A, and the following, apply. 3.1 gaseous effluent monitor equipment intended for continuous monitoring of radioactivity in gaseous effluents. The different parts of the monitor may conveniently be grouped into two assemblies which may be associated or separated according to the monitoring and operating requirements 3.2 detection assembly includes one or more radiation detectors and associated function units 3.3 control and measurement assembly includes assemblies and function units designed to measure quantities connected with ionizing radiation (activity, volumic activity, etc.). The assembly is provided with function units to give a perceptible warning that the quantity being measured exceeds some predetermined value Page 5 EN 607611:2004 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:12:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3.4 conventionally true value (of a quantity) the best estimate of the value of a quantity NOTE A conventionally true value is, in general, regarded as sufficiently close to the true value for the difference to be insignificant for the given purpose. For example, a value and its uncertainty determined from a primary or a secondary standard, or by a reference instrument which has been calibrated against a primary or secondary standard, may be taken as the conventionally true value. 3.5 coefficient of variation the ratio V of the standard deviation s to the arithmetic mean x of a set of n measurements xi given by the following formula: ()V s xxn xx i i n = = 11 1 2 1 3.6 measurement uncertainty parameter associated with the result of a measurement that characterizes the dispersion of the values that could reasonably be attributed to the measurand 3.7 coverage factor numerical factor (k) used as a multiplier of the combined standard uncertainty in order to obtain an expanded uncertainty (see ISO 1995: Guide to the expression of uncertainty in measure- ment) 3.8 decision quantity random variable for the decision whether the physical effect to be measured is present or not 3.9 decision threshold fixed value of the decision quantity by which when exceeded by the result of an actual measurement of a measurand quantifying a physical effect, one decides that the physical effect is present NOTE The statistical test shall be designed so that the probability of wrongly rejecting the hypothesis (error of the first kind) is equal to a given value . For this standard, equals 5 %. 3.10 detection limit smallest true value of the measurand which is detectable by the measuring method NOTE The detection limit is the smallest true value of the measurand which is associated with the statistical test and hypotheses (see decision quantity) by the following characteristics: if in reality the true value is equal to or exceeds the detection limit, the probability of wrongly not rejecting the hypothesis (error of the second kind) shall be at most equal to a given value . For this standard, equals 5 %. 3.11 effective range of measurement range of the values of the activity to be measured over which the performance of a piece of e
