EN ISO 11665-2-2015 en Measurement of radioactivity in the environment C Air radon C 222 C Part 2 Integrated measurement method for determining average potential alpha energy conce.pdf

1、BSI Standards PublicationBS ISO 11665-2:2012Measurement of radioactivityin the environment Air:radon-222Part 2: Integrated measurement methodfor determining average potential alphaenergy concentration of its short-liveddecay productsBS EN I - : 5BS EN ISO 11665-2:2015 BRITISH STANDARDNational forewo

2、rdThis British Standard is the UK implementation of EN ISO 11665-2:2015. It is identical to ISO 11665-2:2012. It supersedes BS ISO 11665-2:2012 which is withdrawn.BSI, as a member of CEN, is obliged to publish EN ISO 11665-2 as a British Standard. However, attention is drawn to the fact that the UK

3、committee voted against its approval as a European Standard. This was due to the fact that the instructions in Subclauses 5.1, 5.2 and 5.3, on how to design a device to measure the average potential alpha energy concentration of radon short-lived decay products, were considered to be too prescriptiv

4、e. It is the opinion of the UK committee that the proposed standard restricts the laboratories to only one set-up, and the same results could be achieved using alternative set-ups. The UK participation in its preparation was entrusted to Technical Committee NCE/2, Radiation protection and measuremen

5、t.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 2015. Published by BSI Sta

6、ndards Limited 2015ISBN 978 0 580 88253 1ICS 13.040.01; 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 July 2012.Amendments/corrigenda issued since pub

7、licationDate Text affected31 October 2015 This corrigendum renumbers BS ISO 11665-2:2012 as BS EN ISO 11665-2:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11665-2 September 2015 ICS 17.240 English Version Measurement of radioactivity in the environment - Air: radon-222 - Part 2: Inte

8、grated measurement method for determining average potential alpha energy concentration of its short-lived decay products (ISO 11665-2:2012) Mesurage de la radioactivit dans lenvironnement - Air: radon 222 - Partie 2: Mthode de mesure intgre pour la dtermination de lnergie alpha potentielle volumique

9、 moyenne de ses descendants vie courte (ISO 11665-2:2012) Ermittlung der Radioaktivitt in der Umwelt - Luft: Radon-222 - Teil 2: Integrierendes Messverfahren fr die Bestimmung des Durchschnittswertes der potenziellen Alpha-Energiekonzentration der kurzlebigen Radon-Folgeprodukte (ISO 11665-2:2012)Th

10、is European Standard was approved by CEN on 12 June 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical referenc

11、es concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN me

12、mber into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, F

13、rance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES

14、 KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11665-2:2015 EBS EN ISO 11665-2:2015BS ISO 11665-2:2012ISO 11665-2:2012(E) ISO 2012 All r

15、ights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normative references . 13 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols . 24 Principle of the measurement method 35 Equipment . 35.1 General . 35.2 Measuring device 35.3 Counting system . 46 Sampling 46.1 S

16、ampling objective . 46.2 Sampling characteristics . 46.3 Sampling conditions . 57 Detection method 68 Measurement 68.1 Procedure 68.2 Influence quantities 68.3 Calibration . 79 Expression of results . 79.1 Average potential alpha energy concentration . 79.2 Standard uncertainty 89.3 Decision thresho

17、ld and detection limit . 89.4 Limits of the confidence interval . 910 Test report . 9Annex A (informative) Example of a method meeting the requirements of this part of ISO 11665 11Bibliography .13EN ISO 11665-2:2015 (E) 3 European foreword The text of ISO 11665-2:2012 has been prepared by Technical

18、Committee ISO/TC 85 “Nuclear energy, nuclear technologies, and radiological protection” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 11665-2:2015 by Technical Committee CEN/TC 430 “Nuclear energy, nuclear technologies, and radiological protection” the

19、 secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2016, and conflicting national standards shall be withdrawn at the latest by March 2016. Attention is

20、drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the foll

21、owing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,

22、Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 11665-2:2012 has been approved by CEN as EN ISO 11665-2:2015 without any modification. BS EN ISO 11665-2:2015EN ISO 11665-2:2015 (E)BS ISO 11665-2:2012

23、ISO 11665-2:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normative references . 13 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols . 24 Principle of the measurement method 35 Equipment . 35.1 General . 35.2 Measuring device 35.3 Co

24、unting system . 46 Sampling 46.1 Sampling objective . 46.2 Sampling characteristics . 46.3 Sampling conditions . 57 Detection method 68 Measurement 68.1 Procedure 68.2 Influence quantities 68.3 Calibration . 79 Expression of results . 79.1 Average potential alpha energy concentration . 79.2 Standard

25、 uncertainty 89.3 Decision threshold and detection limit . 89.4 Limits of the confidence interval . 910 Test report . 9Annex A (informative) Example of a method meeting the requirements of this part of ISO 11665 11Bibliography .13BS EN ISO 11665-2:2015ISO 11665-2:2012(E)BS ISO 11665-2:2012ISO 11665-

26、2:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for w

27、hich a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all

28、 matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are cir

29、culated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held respons

30、ible for identifying any or all such patent rights.ISO 11665-2 was prepared by Technical Committee ISO/TC 85, Nuclear energy, nuclear technologies, and radiological protection, Subcommittee SC 2, Radiological protection.ISO 11665 consists of the following parts, under the general title Measurement o

31、f radioactivity in the environment Air: radon-222: Part 1: Origins of radon and its short-lived decay products and associated measurement methods Part 2: Integrated measurement method for determining average potential alpha energy concentration of its short-lived decay products Part 3: Spot measurem

32、ent method of the potential alpha energy concentration of its short-lived decay products Part 4: Integrated measurement method for determining average activity concentration using passive sampling and delayed analysis Part 5: Continuous measurement method of the activity concentration Part 6: Spot m

33、easurement method of the activity concentration Part 7: Accumulation method for estimating surface exhalation rate Part 8: Methodologies for initial and additional investigations in buildingsThe following parts are under preparation: Part 9: Method for determining exhalation rate of dense building m

34、aterials Part 10: Determination of diffusion coefficient in waterproof materials using activity concentration measurementiv ISO 2012 All rights reservedBS ISO 11665-2:2012ISO 11665-2:2012(E)IntroductionRadon isotopes 222, 220 and 219 are radioactive gases produced by the disintegration of radium iso

35、topes 226, 224 and 223, which are decay products of uranium-238, thorium-232 and uranium-235 respectively, and are all found in the earths crust. Solid elements, also radioactive, followed by stable lead are produced by radon disintegration1.When disintegrating, radon emits alpha particles and gener

36、ates solid decay products, which are also radioactive (polonium, bismuth, lead, etc.). The potential effects on human health of radon lie in its solid decay products rather than the gas itself. Whether or not they are attached to atmospheric aerosols, radon decay products can be inhaled and deposite

37、d in the bronchopulmonary tree to varying depths according to their size.Radon is today considered to be the main source of human exposure to natural radiation. The UNSCEAR (2006) report2suggests that, at the worldwide level, radon accounts for around 52 % of global average exposure to natural radia

38、tion. The radiological impact of isotope 222 (48 %) is far more significant than isotope 220 (4 %), while isotope 219 is considered negligible. For this reason, references to radon in this part of ISO 11665 refer only to radon-222.Radon activity concentration can vary by one to multiple orders of ma

39、gnitude over time and space. Exposure to radon and its decay products varies tremendously from one area to another, as it depends firstly on the amount of radon emitted by the soil and the building materials in each area and, secondly, on the degree of containment and weather conditions in the areas

40、 where individuals are exposed.Variations of a few nanojoules per cubic metre to several thousand nanojoules per cubic metre are observed in the potential alpha energy concentration of short-lived radon decay products.The potential alpha energy concentration of short-lived radon-222 decay products i

41、n the atmosphere can be measured by spot and integrated measurement methods (see ISO 11665-1). This part of ISO 11665 deals with integrated measurement methods. Integrated measuring methods are applicable in assessing human exposure to radiation3.NOTE The origin of radon-222 and its short-lived deca

42、y products in the atmospheric environment and other measurement methods are described generally in ISO 11665-1. ISO 2012 All rights reserved vBS EN ISO 11665-2:2015ISO 11665-2:2012(E)BS ISO 11665-2:2012ISO 11665-2:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide

43、 federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that

44、committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in acco

45、rdance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requir

46、es approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 11665-2 was prepared by Technical

47、 Committee ISO/TC 85, Nuclear energy, nuclear technologies, and radiological protection, Subcommittee SC 2, Radiological protection.ISO 11665 consists of the following parts, under the general title Measurement of radioactivity in the environment Air: radon-222: Part 1: Origins of radon and its shor

48、t-lived decay products and associated measurement methods Part 2: Integrated measurement method for determining average potential alpha energy concentration of its short-lived decay products Part 3: Spot measurement method of the potential alpha energy concentration of its short-lived decay products

49、 Part 4: Integrated measurement method for determining average activity concentration using passive sampling and delayed analysis Part 5: Continuous measurement method of the activity concentration Part 6: Spot measurement method of the activity concentration Part 7: Accumulation method for estimating surface exhalation rate Part 8: Methodologies for initial and additional investigations in buildingsThe following parts are under preparation: Part 9: Method for determining exhalation rate of dense building materials Part 10: D