1、BRITISH STANDARD BS EN 60761-4:2004 Incorporating Amendment No. 1 to BS IEC 60761-4:2002 (renumbers the BS IEC as BS EN 60761-4:2004) Equipment for continuous monitoring radioactivity in gaseous effluents Part 4: Specific requirements for iodine monitors The European Standard EN 60761-4:2004 has the
2、 status of a British Standard ICS 13.280 BS EN 60761-4:2004 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 3 February 2005
3、 ISBN 0 580 40883 3 National foreword This British Standard is the official English language version of EN 60761-4:2004. It is identical with IEC 60761-4:2002. The UK participation in its preparation was entrusted to Technical Committee NCE/2, Health physics instrumentation, which has the responsibi
4、lity to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “Interna
5、tional 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 Brit
6、ish 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 an
7、d 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, the EN foreword page, the IEC title page, pages 2 to 16, the Annex ZA page and a back cover. The BSI copyright notice displayed in this document in
8、dicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15424 3 February 2005 Implementation of the European StandardEUROPEAN STANDARD EN 60761-4 NORME EUROPENNE EUROPISCHE NORM December 2004 CENELEC European Committee for Electrotechnical Standardizatio
9、n Comit Europen de Normalisation Electrotechnique Europisches Komitee fr 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 60761-4:2004 E ICS
10、13.280 English version Equipment for continuous monitoring radioactivity in gaseous effluents Part 4: Specific requirements for iodine monitors (IEC 60761-4:2002) Equipements de surveillance en continu de la radioactivit dans les effluents gazeux Partie 4: Exigences particulires aux moniteurs diode
11、radioactif (CEI 60761-4:2002) Einrichtungen zur kontinuierlichen berwachung von Radioaktivitt in gasfrmigen Ableitungen Teil 4: Besondere Anforderungen an Monitore fr radioaktives Iod (IEC 60761-4:2002) This European Standard was approved by CENELEC on 2004-11-01. CENELEC members are bound to comply
12、 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 Secre
13、tariat 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 t
14、he 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,
15、 Slovenia, Spain, Sweden, Switzerland and United Kingdom. NE 067-164:2004 2 Foreword The text of the International Standard IEC 60761-4:2002, prepared by SC 45B, Radiation protection instrumentation, of IEC TC 45, Nuclear instrumentation, was submitted to the formal vote and was approved by CENELEC
16、as EN 60761-4 on 2004-11-01 without any modification. 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 t
17、he EN have to be withdrawn (dow) 2007-11-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60761-4:2002 was approved by CENELEC as a European Standard without any modification. _ EN607614:2004NORME INTERNATIONALE CEI IEC INTERNATIONAL STANDARD 607
18、61-4 Deuxime dition Second edition 2002-01 Equipements de surveillance en continu de la radioactivit dans les effluents gazeux Partie 4: Exigences particulires aux moniteurs diode radioactif Equipment for continuous monitoring of radioactivity in gaseous effluents Part 4: Specific requirements for r
19、adioactive iodine monitors Numro de rfrence Reference number CEI/IEC 60761-4:2002 2002:416706CEISBEN607614:2004CONTENTS FOREWORD.3 1 Scope and object5 2 Normative references5 3 Terms and definitions .6 4 Classification of iodine monitors6 5 Sampling and detection assembly (where applicable) 6 6 Chec
20、k source .8 7 Expression of measurement8 8 Response to other ionizing radiations8 9 Discrimination against natural activity8 10 Standard test conditions .8 11 Tests performed with variation of the influence quantities9 12 Reference and special sources .9 13 Radiation performance tests .9 14 Tests of
21、 the air circuit .10 15 Type test report and certificate11 Table 1 Reference conditions and standard test conditions .12 Table 2 Tests performed under standard test conditions .13 Table 3 Tests performed with variation of influence quantities.14 Table 4 Tests of air circuit 16 2002:416706CEISB2 EN60
22、7614:2004INTERNATIONAL ELECTROTECHNICAL COMMISSlON _ EQUIPMENT FOR CONTINUOUS MONITORING OF RADIOACTIVITY IN GASEOUS EFFLUENTS Part 4: Specific requirements for radioactive iodine monitors FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
23、 comprising all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes Inter
24、national Standards. 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 preparat
25、ion. The 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 the IEC on technical matters express, as nearly as possible, an international
26、consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical re
27、ports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International. Standards transparently to the maximum extend possible in their national and regional standards. Any diverge
28、nce between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6)
29、 Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60761-4 has been prepared by subcommittee 45B: Radiatio
30、n protection instrumentation, of IEC technical committee 45: Nuclear instrumentation. This standard shall be read in conjunction with IEC 60761-1 (2002). This second edition cancels and replaces the first edition, published in 1983, of which it constitutes a technical revision. The text of this stan
31、dard is based on the first edition, and the following documents: FDIS Report on voting 45B/336/FDIS 45B/347/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
32、 ISO/IEC Directives, Part 3. 2002:416706CEISB3 EN607614:2004The committee has decided that the contents of this publication will remain unchanged until 2006. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. IEC 60761 consists of the following p
33、arts, under the general title: Equipment for continuous monitoring of radioactivity in gaseous effluents. Part 1: General requirements Part 2: Specific requirements for radioactive aerosol monitors including transuranic aerosols Part 3: Specific requirements for radioactive noble gas monitors Part 4
34、: Specific requirements for radioactive iodine monitors Part 5: Specific requirements for tritium monitors 2002:416706CEISB4 EN607614:2004EQUIPMENT FOR CONTINUOUS MONITORING OF RADIOACTIVITY IN GASEOUS EFFLUENTS Part 4: Specific requirements for radioactive iodine monitors 1 Scope and object This pa
35、rt of IEC 60761 is applicable to equipment intended for the simultaneous, delayed or discrete sequential measurement of radioactive iodine in all forms. When the effluent is sampled for measurement, iodine bound on aerosols is generally collected on a prefilter which should be analyzed separately in
36、 a laboratory to provide a complete measurement. It is applicable to equipment designed to fulfill the following functions: the measurement of the volumic activity of iodine and compounds of radioactive iodine in gaseous effluents or of the released iodine total activity; the actuation of an alarm s
37、ignal when either a predetermined concentration or a predetermined total released activity due to iodine or its compounds is exceeded. This equipment is intended for measurement over a wide range of activity in the presence of other radionuclides in the gaseous effluent, including naturally occurrin
38、g radioactive nuclides. Discrimination against other radionuclides can be important in measuring low levels of radioactive iodine. This standard considers both the use of iodine collection media such as activated charcoal and the direct measurement of iodine in stacks or ventilation ducts. The objec
39、t of this standard is to lay down specific standard requirements, including technical characteristics and general test conditions, and to give examples of acceptable methods for iodine monitors as defined in clause 4. The general requirements, technical characteristics, test procedures, radiation ch
40、aracteristics, electrical, mechanical, safety and environmental characteristics are given in IEC 60761-1. Unless otherwise stated, these requirements apply in this standard. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute
41、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 norm
42、ative 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 60068-2-27:1987, Environmental testing Part 2: Tests. Test Ea and guidance: Shock IEC 6
43、0761-1:2002, Equipment for continuous monitoring of radioactivity in gaseous effluents Part 1: General requirements 2002:416706CEISB5 EN607614:2004IEC 61000 (all parts), Electromagnetic compatibility (EMC) EN 55022:1994, Limits and Methods of Measurement of Radio Disturbance Characteristics of Infor
44、mation Technology Equipment 3 Terms and definitions For the purpose of this part of IEC 60761, the following definitions apply: 3.1 iodine unless otherwise specified, the use of the word “iodine” in this standard covers radioactive iodine in all forms whether chemically combined or not, including io
45、dine bound on aerosols NOTE Iodine bound on aerosols is in general trapped on a prefilter which should be analyzed separately in a laboratory. 3.2 iodine monitor equipment designed for the continuous or sequential measurement of iodine in gaseous effluents discharged to the environment 3.3 life time
46、 of the sampling medium the time of sampling from operation with a medium to the time when the collection efficiency is equal to 90 % of the nominal value 4 Classification of iodine monitors The equipment may be classified according to the type of radiation measured as: monitors for the measurement
47、of Iodine-131 only; monitors for the measurement of Iodine-125 and/or Iodine-129; monitors for the overall measurement of all iodine isotopes. It may also be classified according to the method of operation, for example: equipment with static absorption medium and simultaneous measurement; equipment
48、with moving absorption medium and simultaneous measurement; equipment for the direct measurement of iodine in the stack or duct. 5 Sampling and detection assembly (where applicable) 5.1 Sampling and exhaust system In addition to the general requirements of IEC 60761-1, the following characteristics
49、shall be considered and shall be agreed upon between manufacturer and purchaser: the nature of the materials used paying particular attention to iodine adsorption; regulation of the temperature of the air passages to avoid condensation of iodine or its compounds. 2002:416706CEISB6 EN607614:20045.2 Air pump The requirements of clauses 11 and 29 of IEC 60761-1 are applicable.
