EN ISO 16641-2016 en Measurement of radioactivity in the environment - Air - Radon 220 Integrated measurement methods for the determination of the average activity concentration us.pdf
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1、BS EN ISO 16641:2016Measurement of radioactivity in the environment Air Radon 220: Integrated measurement methods for the determination of the average activity concentration using passive solid-state nuclear track detectors (ISO 16641:2014)BSI Standards PublicationBS EN ISO 16641:2016 BRITISH STANDA
2、RDNational forewordThis British Standard is the UK implementation of EN ISO 16641:2016. It is identical to ISO 16641:2014.Attention is drawn to the fact that during the development of this International Standard, the UK committee voted against its approval.This standard proposes a new passive detect
3、or system for measuring thoron (Rn-220) which consists of two passive diffusion chambers. It is the opinion of the UK committee that ISO 16641 does not provide clear guidance and lacks essential technical information about the specific parameters of the diffusion chambers and their operation. More i
4、nformation is needed about the design and technical requirements of the diffusion chambers and the values required for the minimum and maximum diffusion rates of radon/thoron detectors. The UK committee is also of the opinion that ISO 16641 should include additional instruction in section 6.3.1, Ins
5、tallation of sampling devices, to avoid placement of detectors in close proximity to the walls or directly on the floor, so that the risk of thoron contamination from the building materials is minimised.The UK participation in its preparation was entrusted to Technical Committee NCE/2, Radiation pro
6、tection and measurement.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016
7、. Published by BSI Standards Limited 2016ISBN 978 0 580 90933 7ICS 17.240Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2016.Amendments/corrigenda issued
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9、g135g148g149g139g145g144g3g3g16g135g131g149g151g148g135g143g135g144g150g3g145g136g3g148g131g134g139g145g131g133g150g139g152g139g150g155g3g139g144g3g150g138g135g3g135g144g152g139g148g145g144g143g135g144g150g3g486g3g4g139g148g3g486g3g21g131g134g145g144g3g884g884g882g483g3g12g144g150g135g137g148g131g15
10、0g135g134g3g143g135g131g149g151g148g135g143g135g144g150g3g143g135g150g138g145g134g149g3g136g145g148g3g150g138g135g3g134g135g150g135g148g143g139g144g131g150g139g145g144g3g145g136g3g150g138g135g3g131g152g135g148g131g137g135g3g131g133g150g139g152g139g150g155g3g133g145g144g133g135g144g150g148g131g150g13
11、9g145g144g3g151g149g139g144g137g3g146g131g149g149g139g152g135g3g149g145g142g139g134g486g149g150g131g150g135g3g144g151g133g142g135g131g148g3g150g148g131g133g141g3g134g135g150g135g133g150g145g148g149g3g523g12g22g18g3g883g888g888g886g883g483g884g882g883g886g524g3g16g135g149g151g148g131g137g135g3g134g13
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17、139g149g3g8g151g148g145g146g135g131g144g3g22g150g131g144g134g131g148g134g3g153g131g149g3g131g146g146g148g145g152g135g134g3g132g155g3g6g8g17g3g145g144g3g884g883g3g9g135g132g148g151g131g148g155g3g884g882g883g888g484g3g3g3g6g8g17g3g143g135g143g132g135g148g149g3g131g148g135g3g132g145g151g144g134g3g150g1
18、45g3g133g145g143g146g142g155g3g153g139g150g138g3g150g138g135g3g6g8g17g512g6g8g17g8g15g8g6g3g12g144g150g135g148g144g131g142g3g21g135g137g151g142g131g150g139g145g144g149g3g153g138g139g133g138g3g149g150g139g146g151g142g131g150g135g3g150g138g135g3g133g145g144g134g139g150g139g145g144g149g3g136g145g148g3g
19、137g139g152g139g144g137g3g150g138g139g149g3g8g151g148g145g146g135g131g144g3g22g150g131g144g134g131g148g134g3g150g138g135g3g149g150g131g150g151g149g3g145g136g3g131g3g144g131g150g139g145g144g131g142g3g149g150g131g144g134g131g148g134g3g153g139g150g138g145g151g150g3g131g144g155g3g131g142g150g135g148g131
20、g150g139g145g144g484g3g24g146g486g150g145g486g134g131g150g135g3g142g139g149g150g149g3g131g144g134g3g132g139g132g142g139g145g137g148g131g146g138g139g133g131g142g3g148g135g136g135g148g135g144g133g135g149g3g133g145g144g133g135g148g144g139g144g137g3g149g151g133g138g3g144g131g150g139g145g144g131g142g3g14
21、9g150g131g144g134g131g148g134g149g3g143g131g155g3g132g135g3g145g132g150g131g139g144g135g134g3g145g144g3g131g146g146g142g139g133g131g150g139g145g144g3g150g145g3g150g138g135g3g6g8g17g486g6g8g17g8g15g8g6g3g16g131g144g131g137g135g143g135g144g150g3g6g135g144g150g148g135g3g145g148g3g150g145g3g131g144g155g
22、3g6g8g17g3g143g135g143g132g135g148g484g3g3g23g138g139g149g3g8g151g148g145g146g135g131g144g3g22g150g131g144g134g131g148g134g3g135g154g139g149g150g149g3g139g144g3g150g138g148g135g135g3g145g136g136g139g133g139g131g142g3g152g135g148g149g139g145g144g149g3g523g8g144g137g142g139g149g138g481g3g9g148g135g144
23、g133g138g481g3g10g135g148g143g131g144g524g484g3g4g3g152g135g148g149g139g145g144g3g139g144g3g131g144g155g3g145g150g138g135g148g3g142g131g144g137g151g131g137g135g3g143g131g134g135g3g132g155g3g150g148g131g144g149g142g131g150g139g145g144g3g151g144g134g135g148g3g150g138g135g3g148g135g149g146g145g144g149g
24、139g132g139g142g139g150g155g3g145g136g3g131g3g6g8g17g3g143g135g143g132g135g148g3g139g144g150g145g3g139g150g149g3g145g153g144g3g142g131g144g137g151g131g137g135g3g131g144g134g3g144g145g150g139g136g139g135g134g3g150g145g3g150g138g135g3g6g8g17g486g6g8g17g8g15g8g6g3g16g131g144g131g137g135g143g135g144g150
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