BS IEC 61577-2-2014 Radiation protection instrumentation Radon and radon decay product measuring instruments Specific requirements for 2 2 2Rn and 2 2 0Rn measuring instruments《辐射防.pdf

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1、BSI Standards PublicationRadiation protection instrumentation Radon and radon decay product measuring instrumentsPart 2: Specific requirements for 222Rn and 220Rn measuring instrumentsBS IEC 61577-2:2014National forewordThis British Standard is the UK implementation of IEC 61577-2:2014. Itsupersedes

2、 BS IEC 61577-2:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee NCE/2, Radiation protection and measurement.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to includ

3、e all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 71957 8ICS 13.280; 17.240Compliance with a British Standard cannot confer immunity fromlegal obligations.This B

4、ritish Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2014. Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS IEC 61577-2:2014IEC 61577-2 Edition 2.0 2014-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Radiation pr

5、otection instrumentation Radon and radon decay product measuring instruments Part 2: Specific requirements for 222Rn and 220Rn measuring instruments Instrumentation pour la radioprotection Instruments de mesure du radon et des descendants du radon Partie 2: Exigences spcifiques pour les instruments

6、de mesure du 222Rn et du 220Rn INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE T ICS 13.280 PRICE CODE CODE PRIX ISBN 978-2-8322-1675-0 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internatio

7、nale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. BS IEC 61577-2:2014 2 IEC 61577-2:2014 IEC 2014 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative ref

8、erences 7 3 Terms and definitions 8 4 General design considerations. 9 4.1 Design considerations for the measurements 9 4.1.1 General . 9 4.1.2 Effects caused by physical properties of 222Rn and 220Rn . 10 4.2 Design considerations for handling and maintenance 10 4.2.1 Portability 10 4.2.2 Applicati

9、on under harsh environmental conditions . 10 4.2.3 Automatic operation . 11 4.2.4 Reliability 11 4.2.5 Capability for operational testing . 11 4.2.6 Adjustment and maintenance facilities . 11 4.2.7 Acoustic noise level . 11 4.2.8 Electromagnetic interference . 11 4.2.9 Storage . 12 5 Technical compo

10、nents . 12 5.1 Sampling assembly . 12 5.2 Radiation detection assembly . 12 5.3 Data processing and recording . 13 5.4 Measurement display 13 5.5 Power supply 13 6 Test conditions 14 6.1 General . 14 6.2 Standard test conditions . 14 6.3 Execution of tests . 14 6.4 Reference atmospheres 14 7 Require

11、ments and tests concerning radiation detection performance . 15 7.1 Reference response to a test source . 15 7.1.1 Requirements 15 7.1.2 Test method 15 7.2 Cross-interference to other radon isotopes . 15 7.2.1 Requirements 15 7.2.2 Test method 15 7.3 Linearity of indication 15 7.3.1 Requirements 15

12、7.3.2 Test method 16 7.4 Instrument statistical fluctuation 16 7.4.1 Requirements 16 7.4.2 Test method 16 7.5 Response time 17 7.5.1 Requirements 17 BS IEC 61577-2:2014IEC 61577-2:2014 IEC 2014 3 7.5.2 Test method 17 7.6 Signal accumulation 17 7.6.1 Requirements 17 7.6.2 Test method 17 8 Requirement

13、s and tests concerning air circuit performance . 17 8.1 General . 17 8.2 Flow-rate stability . 18 8.2.1 Requirements 18 8.2.2 Test method 18 8.3 Accuracy of the air flow-rate measurement . 18 8.3.1 Requirements 18 8.3.2 Test method 18 8.4 Effect of filter pressure drop 18 8.4.1 Requirements 18 8.4.2

14、 Test method 18 8.5 Indication of low sampling flow-rate 19 8.5.1 Requirements 19 8.5.2 Test method 19 9 Requirements and tests concerning environmental performance 19 9.1 Response to ambient gamma radiation . 19 9.1.1 Requirements 19 9.1.2 Test method 19 9.2 Ambient temperature 19 9.2.1 Requirement

15、s 19 9.2.2 Test method 19 9.3 Relative humidity and condensed moisture . 20 9.3.1 Requirements 20 9.3.2 Test method 20 9.4 Atmospheric pressure . 20 10 Requirements and tests concerning electrical performance . 20 10.1 Power supply variations 20 10.1.1 Requirements 20 10.1.2 Test method 20 10.2 Batt

16、ery test . 21 10.2.1 Requirements 21 10.2.2 Test method 21 11 Requirements and tests concerning mechanical performance 21 11.1 Requirements . 21 11.2 Test method 21 12 Operation and maintenance manual 21 13 Type test report and certificate 22 Table 1 Reference conditions and standard test conditions

17、 (unless otherwise indicated by the manufacturer) 23 Table 2 Tests of the radiation detection performance . 23 Table 3 Tests of the air circuit performance . 24 Table 4 Tests performed with variation of influence quantities 24 BS IEC 61577-2:2014 4 IEC 61577-2:2014 IEC 2014 INTERNATIONAL ELECTROTECH

18、NICAL COMMISSION _ RADIATION PROTECTION INSTRUMENTATION RADON AND RADON DECAY PRODUCT MEASURING INSTRUMENTS Part 2: Specific requirements for 222Rn and 220Rn measuring instruments FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprisi

19、ng 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 Standard

20、s, 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 preparat

21、ory 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 organizati

22、ons. 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 re

23、commendations 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

24、 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

25、publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by in

26、dependent certification bodies. 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 a

27、ny 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 Normat

28、ive 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 respons

29、ible for identifying any or all such patent rights. International Standard IEC 61577-2 has been prepared by sub-committee 45B: Radiation protection instrumentation, of IEC technical committee 45: Nuclear instrumentation. This second edition cancels and replaces the first edition issued in 2000. This

30、 edition constitutes a technical revision. This second edition includes the following significant technical changes with respect to the previous edition: a) Addition of new requirements and tests concerning radiation detection performance. b) Addition of new requirements and tests concerning environ

31、mental performance. BS IEC 61577-2:2014IEC 61577-2:2014 IEC 2014 5 c) Harmonization of the requirements and tests concerning electrical and mechanical performance with other standards in the area of radon and radon decay product instrumentation. The text of this standard is based on the following do

32、cuments: FDIS Report on voting 45B/793/FDIS 45B/798/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. A list of all parts of IEC

33、61577 series, under the general title Radiation protection instrumentation Radon and radon decay product measuring instruments, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web sit

34、e 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. BS IEC 61577-2:2014 6 IEC 61577-2:2014 IEC 2014 INTRODUCTION Radon is a radioactive trace gas produced by the deca

35、y of 226Ra, 223Ra and 224Ra, respectively decay products of 238U, 235U and 232Th which are present in the earths crust. By decay, radon isotopes (i.e. 222Rn, 219Rn, 220Rn) produce three decay chains, each ending in a stable lead isotope. The radon isotope 220Rn is generally known as thoron1. NOTE In

36、 normal conditions, due to the very short half-life of 219Rn, its activity and the activity of its RnDP2are considered negligible compared to the activity of the other two series. Its health effects are therefore not important. Thus in this standard 219Rn and its decay products are not considered. I

37、n order to facilitate its use, the IEC 61577 series is divided into the following different parts: IEC 61577-1: This part emphasizes the terminology and units used in the specific field of radon and radon decay products (RnDP) measurement techniques and describes briefly the concept of System for Te

38、st Atmospheres with Radon (STAR) used for test and calibration of radon and RnDP measuring devices. IEC 61577-2: This part is dedicated to the tests of 222Rn and 220Rn measuring instruments. IEC 61577-3: This part is dedicated to the tests of RnDP222and RnDP220measuring instruments. IEC 61577-4: Thi

39、s part is dedicated to the construction of a STAR and its use for testing. IEC/TR 61577-5 (informative): This is a technical report (to be developed) concerning special features of radon and/or RnDP measurement. 1The term thoron is not used in this standard. Instead, the term radon is used to denote

40、 the radionuclides 220Rn and 222Rn. In the case that one of these radionuclides is to be explicitly specified, the atomic mass number and the chemical symbol are given. 2RnDP is the acronym for Radon Decay Products, which are sometimes called radon progeny. The term Radon Decay Products or its abbre

41、viation (RnDP) denotes the whole set of short-lived decay products that becomes the focus of this standard. A particular isotope is indicated by its chemical symbol preceded by its mass number. The subscripts 222, 220added to the symbol RnDP refer to the whole set of short-lived decay products of th

42、e corresponding radon isotope (RnDP222: 218Po, 214Pb, 214Bi, 214Po, and RnDP220: 216Po, 212Pb, 212Bi, 212Po, 208Tl). BS IEC 61577-2:2014IEC 61577-2:2014 IEC 2014 7 RADIATION PROTECTION INSTRUMENTATION RADON AND RADON DECAY PRODUCT MEASURING INSTRUMENTS Part 2: Specific requirements for 222Rn and 220

43、Rn measuring instruments 1 Scope This part of IEC 61577 describes the specific requirements for instruments measuring the activity concentration of airborne 222Rn and 220Rn outdoors, in dwellings, and in workplaces including underground mines. This standard applies practically to all types of electr

44、onic measuring instruments that are based on either spot or continuous measurements. The activity concentration can be measured by pumping or by diffusing the air containing 222Rn and/or 220Rn into the sensitive volume of the detection unit or at a particular moment by taking an air sample (grab sam

45、pling). The different types of instrumentation used for measurements are stated in IEC 61577-1. The standard does not apply to instruments using charcoal adsorption, electrets or solid state nuclear track detectors. 2 Normative references The following documents, in whole or in part, are normatively

46、 referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-27, Environmental testing Part 2-27: Tests Test Ea and g

47、uidance: Shock IEC 61000-6-4, Electromagnetic compatibility (EMC) Part 6-4: Generic standards Emission standard for industrial environments IEC 61140, Protection against electric shock Common aspects for installation and equipment IEC 61187, Electrical and electronic measuring equipment Documentatio

48、n IEC 61577-1, Radiation protection instrumentation Radon and radon decay product measuring instruments Part 1: General principles ISO/IEC Guide 98-3:2008, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) ISO 11665-1, Measurement of radioactivity in

49、 the environment Air: radon-222 Part 1: Origins of radon and its short-lived decay products and associated measurement methods BS IEC 61577-2:2014 8 IEC 61577-2:2014 IEC 2014 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 conventionally true value of a quantity cvalue attributed to a particular quantity and accepted, sometimes by convention, as having an uncertainty appropriate for a given purpose