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 Licensed Copy: Wang Bin, na, Tue Apr 26 07:03:50 BST 2005, Uncontrolled Copy, (c) BSIBS 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
3、of the Standards Policy and Strategy Committee on 4 December 2002 BSI 3 February 2005 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 t
4、o Technical Committee NCE/2, Health physics instrumentation, which has the responsibility 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 i
5、n 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
6、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 propo
7、sals 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, the EN foreword page, the IEC title page, pages 2 to 16, the A
8、nnex ZA page and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15424 3 February 2005 Implementation of the European Standard Licensed Copy: Wang Bin, na, Tue Apr 26 07:03:50 BS
9、T 2005, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 60761-4 NORME EUROPENNE EUROPISCHE NORM December 2004 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de St
10、assart 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 13.280 English version Equipment for continuous monitoring radioactivity in gaseous effluents Part 4: Specific requirements for i
11、odine monitors (IEC 60761-4:2002) Equipements de surveillance en continu de la radioactivit dans les effluents gazeux Partie 4: Exigences particulires aux moniteurs diode radioactif (CEI 60761-4:2002) Einrichtungen zur kontinuierlichen berwachung von Radioaktivitt in gasfrmigen Ableitungen Teil 4: B
12、esondere 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 with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a natio
13、nal 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
14、 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, D
15、enmark, 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: Wang Bin, na, Tue Apr 26 07:03:50 BST 2005, Uncontrolled
16、 Copy, (c) BSINE 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 as EN 60761-4 on 2004-11-01 without any modi
17、fication. 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
18、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. _ EN607614:2004Licensed Copy: Wang Bin, na, Tue Apr 26 07:03:50 BST 2005, Uncontrolled Copy, (c) BSINORME INTERNAT
19、IONALE CEI IEC INTERNATIONAL STANDARD 60761-4 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 effl
20、uents Part 4: Specific requirements for radioactive iodine monitors Numro de rfrence Reference number CEI/IEC 60761-4:2002 2002:416706CEISBEN607614:2004Licensed Copy: Wang Bin, na, Tue Apr 26 07:03:50 BST 2005, Uncontrolled Copy, (c) BSICONTENTS FOREWORD.3 1 Scope and object5 2 Normative references5
21、 3 Terms and definitions .6 4 Classification of iodine monitors6 5 Sampling and detection assembly (where applicable) 6 6 Check 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
22、 with variation of the influence quantities9 12 Reference and special sources .9 13 Radiation performance tests .9 14 Tests of 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 condition
23、s .13 Table 3 Tests performed with variation of influence quantities.14 Table 4 Tests of air circuit 16 2002:416706CEISB2 EN607614:2004Licensed Copy: Wang Bin, na, Tue Apr 26 07:03:50 BST 2005, Uncontrolled Copy, (c) BSIINTERNATIONAL ELECTROTECHNICAL COMMISSlON _ EQUIPMENT FOR CONTINUOUS MONITORING
24、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 comprising all national electrotechnical committees (IEC National Committees). The objec
25、t 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 International Standards. Their preparation is entrusted to technical committees; any IEC Natio
26、nal 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. The IEC collaborates closely with the International Organization for Standardization
27、 (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 consensus of opinion on the relevant subjects since each technical committee has represen
28、tation 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 reports or guides and they are accepted by the National Committees in that sense. 4) In ord
29、er 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 divergence between the IEC Standard and the corresponding national or regional standard shall be
30、 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) Attention is drawn to the possibility that some of the elements of this International St
31、andard 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: Radiation protection instrumentation, of IEC technical committee 45: Nuclear instrumentation. Thi
32、s 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 standard is based on the first edition, and the following documents: FDIS Report on voting 45
33、B/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 ISO/IEC Directives, Part 3. 2002:416706CEISB3 EN607614:2004Licensed Copy: Wang Bin, na,
34、Tue Apr 26 07:03:50 BST 2005, Uncontrolled Copy, (c) BSIThe 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 parts
35、, 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: Sp
36、ecific requirements for radioactive iodine monitors Part 5: Specific requirements for tritium monitors 2002:416706CEISB4 EN607614:2004Licensed Copy: Wang Bin, na, Tue Apr 26 07:03:50 BST 2005, Uncontrolled Copy, (c) BSIEQUIPMENT FOR CONTINUOUS MONITORING OF RADIOACTIVITY IN GASEOUS EFFLUENTS Part 4:
37、 Specific requirements for radioactive iodine monitors 1 Scope and object This part 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 aero
38、sols is generally collected on a prefilter which should be analyzed separately in 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 gaseou
39、s effluents or of the released iodine total activity; the actuation of an alarm signal 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 pres
40、ence of other radionuclides in the gaseous effluent, including naturally occurring 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 charco
41、al and the direct measurement of iodine in stacks or ventilation ducts. The object 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. T
42、he general requirements, technical characteristics, test procedures, radiation characteristics, 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 normativ
43、e 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 encourage
44、d 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 60068-
45、2-27:1987, Environmental testing Part 2: Tests. Test Ea and guidance: Shock IEC 60761-1:2002, Equipment for continuous monitoring of radioactivity in gaseous effluents Part 1: General requirements 2002:416706CEISB5 EN607614:2004Licensed Copy: Wang Bin, na, Tue Apr 26 07:03:50 BST 2005, Uncontrolled
46、Copy, (c) BSIIEC 61000 (all parts), Electromagnetic compatibility (EMC) EN 55022:1994, Limits and Methods of Measurement of Radio Disturbance Characteristics of Information Technology Equipment 3 Terms and definitions For the purpose of this part of IEC 60761, the following definitions apply: 3.1 io
47、dine unless otherwise specified, the use of the word “iodine” in this standard covers radioactive iodine in all forms whether chemically combined or not, including iodine bound on aerosols NOTE Iodine bound on aerosols is in general trapped on a prefilter which should be analyzed separately in a lab
48、oratory. 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 of the sampling medium the time of sampling from operation with a medium to the time when the collection efficiency is equal to 90 %
49、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 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: eq
