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1、BRITISH STANDARD BS IEC 61577-2:2000 Radiation protection instrumentation Radon and radon decay product measuring instruments Part 2: Specific requirements for radon measuring instruments ICS 13.280 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled Copy,
2、(c) BSI BS IEC 61577-2:2000 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 12 December 2002 BSI 12 December 2002 ISBN 0 580 40909 0 National f
3、oreword This British Standard reproduces verbatim IEC 61577-2:2000 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee NCE/2, Health physics instrumentation, which has the responsibility to: A list of organizations represented o
4、n 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 “S
5、earch” 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
6、 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. Sum
7、mary of pages This document comprises a front cover, an inside front cover, the IEC title page, pages 2 to 20, an inside back cover 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. DateCommen
8、ts Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI NORME INTERNATIONALE CEI IEC INTERNATIONAL STANDARD 61577-2 Premire dition First edition 2000-10 Instrumentation pour la radioprotection Instruments de mesure du radon et des descendants du
9、radon Partie 2: Exigences spcifiques concernant les instruments de mesure du radon Radiation protection instrumentation Radon and radon decay product measuring instruments Part 2: Specific requirements for radon measuring instruments Numro de rfrence Reference number CEI/IEC 61577-2:2000 BS IEC 6157
10、72:2000 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CONTENTS Page FOREWORD.4 INTRODUCTION.5 Clause 1Scope and object6 2Normative references6 3Definitions 7 4General characteristics .8 4.1Range of measurement8 4.2Minimum detectable volume
11、 activity.8 4.3Reference source 8 5Technical characteristics.9 5.1Radiation detection unit .9 5.2Air-pumping device9 5.3Aerosol retention device 9 5.4Air-drying device9 5.5Provisions for operational testing .10 5.6Signal processing circuit 10 5.7Measurement display and output device.10 5.8Power supp
12、ly subassembly10 5.9General construction10 6General test procedures11 6.1Definition of test conditions11 6.2Standard test conditions 11 6.3Tests performed with variation of the influence quantities.11 6.4Statistical fluctuation12 7Test sources.12 7.1General .12 7.2Special sources .13 7.3Check source
13、s.13 7.4Reference atmospheres.13 8Test nomenclature13 8.1Reference response 13 8.2Qualification tests13 8.3Expression of results .14 9Radiation performance requirements and tests14 9.1Response to special sources .14 9.2Response to reference atmospheres14 10Environmental performance requirements and
14、tests 15 10.1General .15 10.2Response to ambient gamma radiation 15 10.3Ambient temperature .16 BS IEC 615772:2000 2 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ClausePage 10.4Relative humidity .16 10.5Atmospheric pressure16 11Electrical
15、 performance requirements and tests17 11.1Statistical fluctuation17 11.2Power supply.17 11.3Power supply variation.18 11.4Warm-up time18 11.5Response time 18 12Mechanical performance requirements and tests.18 12.1Mechanical shock 18 13Documentation .19 13.1Type test report .19 13.2Identification cer
16、tificate19 14Operation and maintenance manual19 Table 1 Reference conditions and standard test conditions (unless otherwise indicated by the manufacturer).20 Table 2 Tests performed under standard test conditions .20 Table 3 Tests performed with variation of influence quantities.20 BS IEC 615772:200
17、0 3 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL ELECTROTECHNICAL COMMISSION _ RADIATION PROTECTION INSTRUMENTATION RADON AND RADON DECAY PRODUCT MEASURING INSTRUMENTS Part 2: Specific requirements for radon measuring instru
18、ments FOREWORD 1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardizati
19、on 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 National Committee interested in the subject dealt with may participate in this preparatory work. In
20、ternational, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2)T
21、he 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 representation from all interested National Committees. 3)The documents produced have the form of recomm
22、endations 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 order to promote international unification, IEC National Committees undertake to apply IEC Internati
23、onal Standards transparently to the maximum extent possible in their national and regional standards. Any divergence 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 approva
24、l 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 Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying
25、any or all such patent rights. International Standard IEC 61577-2 has been prepared by subcommittee 45B: Radiation protection instrumentation, of IEC technical committee 45: Nuclear instrumentation. The text of this standard is based on the following documents: FDISReport of voting 45B/269/FDIS45B/2
26、83/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. The committee has decided that the contents of this publication will remain
27、unchanged until 2004. At this date, the publication will be ?reconfirmed; ?withdrawn; ?replaced by a revised edition, or ?amended. BS IEC 615772:2000 4 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTRODUCTION This International Standard
28、is part of a series covering radon and radon decay product measuring instruments as well as systems for test atmospheres with radon (acronym STAR) 1). This series consists of the following parts: Part 1: General requirements Part 2: Specific requirements for radon measuring instruments Part 3: Speci
29、fic requirements for radon decay product measuring instruments 2) Part 4: Instruments for rapid measurement of potential alpha energy in mines 3) Part 1 covers the general characteristics of tests and calibrations of radon and radon decay product measuring instruments as well as general characterist
30、ics of radon and radon decay product measuring instruments. _ 1) System for Test Atmospheres with Radon, sometimes called radon chambers. See IEC 61577-1. 2) To be published. 3) Under consideration. Presently available under reference IEC 61263. BS IEC 615772:2000 5 Licensed Copy: sheffieldun sheffi
31、eldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI RADIATION PROTECTION INSTRUMENTATION RADON AND RADON DECAY PRODUCT MEASURING INSTRUMENTS Part 2: Specific requirements for radon measuring instruments 1 Scope and object The requirements of this part of IEC 61577 are applicabl
32、e to instruments for measuring airborne radon volume activity. This part is applicable to instruments used to measure radon in work places, in dwellings, outdoors and in soil. The method of measurement depends on the exact objective but the requirements are for general purpose instruments to be used
33、 for radiological protection or research applications. This standard applies to all types of radon measuring instruments that are based on grab sampling, continuous and integrated methods. The activity can be measured continuously by pumping or by diffusing the air containing radon into the detector
34、 or at a particular moment by measuring the activity of an air sample (grab sampling). The purpose of this part of IEC 61577 is to specify the main performance characteristics of instruments intended for measurement of airborne radon volume activity, their specific method of testing and documentatio
35、n requirements. This part is to be used with IEC 61577-1. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61577. For dated references, subsequent amendments to, or revisions of, any of these
36、publications do not apply. However, parties to agreements based on this part of IEC 61577 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 ap
37、plies. Members of ISO and IEC maintain registers of currently valid International Standards. IEC 60050(393):1996, International Electrotechnical Vocabulary (IEV) Chapter 393: Nuclear instrumentation: Physical phenomena and basic concepts IEC 60050(394):1995, International Electrotechnical Vocabulary
38、 (IEV) Chapter 394: Nuclear instrumentation: Instruments IEC 60068 (all parts), Environmental testing IEC 60068-2-27:1987, Environmental testing Part 2: Tests Test Ea and guidance: Shock BS IEC 615772:2000 6 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled
39、 Copy, (c) BSI IEC 60181:1964, Index of electrical measuring apparatus used in connection with ionizing radiation IEC 60181A:1965, First supplement IEC 61187:1993, Electrical and electronic measuring equipment Documentation IEC 61577-1, Radiation protection instrumentation Radon and radon decay prod
40、uct measuring instruments Part 1: General requirements IEC 61577-4, Radiation protection instrumentation Radon and radon decay product measuring instruments Part 4: Instruments for rapid measurements of potential alpha energy in mines 1) 3 Definitions For the purpose of this part of IEC 61577 the fo
41、llowing definitions apply as well as those given in IEC 60050(393), IEC 60050(394), IEC 60181, IEC 60181A and IEC 61577-1. 3.1 conventionally true value of a quantity best estimate of the value of a quantity determined by a primary or secondary standard, or by a reference instrument that has been ca
42、librated against a primary or secondary standard 3.2 relative intrinsic error relative intrinsic error E, expressed as a percentage, given by the relationship: E = (Qi Qt) 100/Qt % where Qi is the indicated value; Qt is the conventionally true value. 3.3 coefficient of variation ratio of the standar
43、d deviation ? to the arithmetic mean x of a set of measurements xi given by the formula: ? 1 1 2 i ? ? ? ? n xx xx V ? 3.4 reference response Rref response Rref of the instrument under standard test conditions to the reference source activity _ 1) Under consideration Presently available under refere
44、nce IEC 61263. BS IEC 615772:2000 7 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:42:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3.5 response time time delay between initial exposure of the detection assembly to a given value of the measurement quantity and the attainment of 90 % of th
45、e equilibrium reading, or for integrating (slope) assemblies, 90 % of the equilibrium value of the first derivative of the indication, with respect to time 4 General characteristics To measure radon volume activity, several methods of measurement can be used and many different instruments are commer
46、cially available. General aspects of the physical principles involved and of the instrument performances have been summarized in IEC 61577-1. The methods of measurement normally used are the ionization chamber, scintillation flask or solid state detector with electrostatic precipitation. Most of the
47、 measurement methods require the air to be filtered to remove radon decay products before entering the detector. For instantaneous measurement of radon volume activity, grab sampling methods are used. A sample of the air to be measured may be collected by filling a container, either one that has bee
48、n previously evacuated or a flow-through type, and resealing the container. The radon from the sampler is then transferred to the measuring chamber, which may be an ionization chamber or a scintillation flask. In some cases, scintillation flasks themselves are used as samplers. To measure the variat
49、ion of radon volume activity, continuous measurement methods are used. In most continuous monitors, the air is drawn through a scintillation flask or a flow-through ionization chamber or the air diffuses into the detector. Solid state detectors may also be used to monitor radon volume activity continuously. The determination of the radon concentration may be affected by changes in the flow rate. The air humidity may affect the e