1、 IEC 62438Edition 1.0 2010-03INTERNATIONAL STANDARD NORME INTERNATIONALERadiation protection instrumentation Mobile instrumentation for the measurement of photon and neutron radiation in the environment Instrumentation pour la radioprotection Instrumentation mobile pour la mesure des rayonnements ga
2、mma et neutroniques dans lenvironnement IEC62438:2010 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, incl
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16、ous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 62438Edition 1.0 2010-03INTERNATIONAL STANDARD NORME INTERNATIONALERadiation protection instrumentation Mobile instrumentation for the measurement of photon a
17、nd neutron radiation in the environment Instrumentation pour la radioprotection Instrumentation mobile pour la mesure des rayonnements gamma et neutroniques dans lenvironnement INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE WICS 13.280 PRICE CODECODE PRIXISBN 2-
18、8318-1084-3 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 62438 IEC:2010 CONTENTS FOREWORD.6 1 Scope and object8 2 Normative references .8 3 Terms, definitions and nomenclature 9 3.1 Definitions .9 3.1.1 mobile d
19、etection system 9 3.1.2 energy resolution.9 3.1.3 background (intrinsic, platform and cosmic).9 3.1.4 positional reference .9 3.1.5 area of investigation 9 3.1.6 sampling interval .9 3.1.7 reference soil or surface 10 3.1.8 platform .10 3.2 Test nomenclature.10 3.2.1 qualification tests 10 3.2.2 acc
20、eptance test .10 4 General system configuration .10 5 General requirements.11 5.1 Power supply.11 5.2 Battery power supply.12 5.3 Cabling and connections .12 5.4 Shock (operating)12 5.5 Vibration (operating)12 5.6 Vibration (non-operating).12 5.7 Water resistance .12 5.8 Spectrometric systems 12 6 C
21、lassification of the performance characteristics 12 7 General test procedures .12 7.1 Nature of tests.12 7.2 Reference conditions and standard test conditions 13 7.3 Position of assembly for purposes of tests.13 7.4 Statistical fluctuations .13 7.5 Reference radiation.13 8 General performance specif
22、ication and testing requirement13 8.1 Power supply.13 8.1.1 Requirements 13 8.1.2 Test method 13 8.2 Battery power supply.14 8.2.1 Requirements 14 8.2.2 Test method 14 8.3 Warm-up time14 8.3.1 Requirements 14 8.3.2 Test method 14 8.4 Radio frequency (RF) requirements.14 8.4.1 Requirements 14 8.4.2 T
23、est method 15 62438 IEC:2010 3 8.5 RF susceptibility15 8.5.1 Requirements 15 8.5.2 Test method 15 8.6 Temperature15 8.6.1 Requirements 15 8.6.2 Test method .15 8.7 Relative Humidity 15 8.7.1 Requirements 15 8.7.2 Test method 15 8.8 Shock (operating)16 8.8.1 Requirements 16 8.8.2 Test method 16 8.9 V
24、ibration (operating)16 8.9.1 Requirements 16 8.9.2 Test method 16 8.10 Vibration (non-operating).16 8.10.1 Requirements 16 8.10.2 Test method 16 8.11 Water resistance .16 8.11.1 Requirements 16 8.11.2 Test method 16 8.12 Temperature effects 17 8.12.1 Requirements 17 8.12.2 Test method 17 8.13 Summed
25、 detector resolution17 8.13.1 Requirements 17 8.13.2 Test method 17 9 Scintillation based detector module requirements .17 9.1 Photomultiplier count rate stability.17 9.1.1 Requirements 17 9.1.2 Test method 17 9.2 Photomultiplier magnetic shielding 17 9.2.1 Requirements 17 9.2.2 Test method 17 10 Hi
26、gh purity germanium (HPGE) detector requirements17 10.1 Spectrum requirements .17 10.2 Test method 18 11 Neutron detector requirements .18 11.1 Neutrons .18 11.1.1 Requirements 18 11.1.2 Test method 18 11.2 Shock and vibration.18 11.2.1 Requirements 18 11.2.2 Test method 18 11.3 Strong gamma ray fie
27、ld .18 11.3.1 Requirements 18 11.3.2 Test method 18 11.4 Measurement time reference .18 11.4.1 Requirements 18 4 62438 IEC:2010 11.4.2 Test method 18 12 Specific test for preamplifier and ADC modules for spectrum-capable detectors .19 12.1 Spectral gain stability 19 12.1.1 Requirements 19 12.1.2 Tes
28、t method 19 12.2 Livetime reference.19 12.2.1 Requirements 19 12.2.2 Test method 19 12.3 ADC 19 12.3.1 Requirements 19 12.3.2 Test method 19 12.4 Linearity of count rate response 19 12.4.1 Requirements 19 12.4.2 Test method 19 13 Spectral specifications and test requirements for spectrum capable det
29、ectors 20 13.1 Multicrystal array performance 20 13.1.1 Requirements 20 13.1.2 Test method 20 13.2 Spectrum recording .20 13.2.1 Requirements 20 13.2.2 Test method 20 13.3 Data transfer .20 13.3.1 Requirements 20 13.3.2 Test method 20 13.4 Synchronisation of acquisition periods.20 13.4.1 Requirement
30、s 20 13.4.2 Test method 20 13.5 Synchronisation with positional information .20 13.5.1 Requirements 20 13.5.2 Test method 20 13.6 Synchronisation with height above ground surface information 21 13.6.1 Requirements 21 13.6.2 Test method 21 14 Data logging.21 14.1 Time referencing .21 14.1.1 Requireme
31、nts 21 14.1.2 Test method 21 15 Installation requirement minimising shielding from the platform for internally mounted detectors21 15.1 Requirements21 15.2 Test method 21 16 Additional requirements21 16.1 General .21 16.2 Real time data display requirements22 17 Documentation .22 17.1 Instructions m
32、anual .22 17.2 Test certificate 22 18 Safety requirements .22 62438 IEC:2010 5 Annex A (informative) Data processing 24 Annex B (informative) A typical analysis scenario for natural (K(potassium) U(uranium) T(thorium) extraction only27 Annex C (informative) Structured sampling plans for reference so
33、ils 31 Annex D (informative) Mechanical performance requirements36 Bibliography37 Figure 1 Schematic diagram of the typical components of a mobile platform system 11 Figure C.1 The expanding hexagonal sampling and typical sampling sets A and B.31 Figure C.2 Coincidence between the area of investigat
34、ion for 137Cs and the hexagonal sampling plan 33 Table 1 Typical detector deployment for different applications .11 Table 2 RF emission limits measured at 3 m distance from the assembly.15 Table 3 Reference conditions and standard test conditions22 Table 4 Tests performed under standard test conditi
35、ons 23 Table 5 Tests performed with variation of influence quantities23 Table A.1 Conversion values between natural radionuclide concentrations and Kerma rate in air 25 Table C.1 Weighting for each hexagonal shell with radionuclide energy and detector altitude .32 Table C.2 The spatially weighted me
36、an activities for 137Cs at Caerlaverock sampling site for detector altitudes at 1 m, 50 m and 100 m.34 Table C.3 Comparison of derived calibration coefficients from hexagonal calibration sites (all errors quoted as 1 standard error except which is 1 standard deviation) .35 Table D.1 Vibration break
37、points 36 6 62438 IEC:2010 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ RADIATION PROTECTION INSTRUMENTATION MOBILE INSTRUMENTATION FOR THE MEASUREMENT OF PHOTON AND NEUTRON RADIATION IN THE ENVIRONMENT FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for st
38、andardization comprising 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
39、International Standards, 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 partic
40、ipate in this preparatory 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 betw
41、een the two organizations. 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 Publicatio
42、ns have the form of recommendations 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 an
43、y misinterpretation by 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
44、 national or regional 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 serv
45、ices carried out by independent 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 Nat
46、ional Committees for any 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
47、is drawn to the Normative 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 sha
48、ll not be held responsible for identifying any or all such patent rights. International Standard IEC 62438 has been prepared by subcommittee 45B: Radiation protection instrumentation, of IEC technical committee 45: Nuclear instrumentation. This standard cancels and replaces IEC 61134, issued in 1992
49、. The scope of IEC 61134 was restricted to exploration for geological deposits of potassium, uranium and thorium. IEC 62438 incorporates the range of currently available detector technologies and incorporates neutron monitoring. This standard also relates to a wide range of mobile platform applications including environmental, emergency response, security in addition to geological. The text of this standard is based on
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