1、BSI Standards PublicationBS ISO 11665-5:2012Measurement of radioactivityin the environment Air:radon-222Part 5: Continuous measurement methodof the activity concentrationBS EN ISO 11665-5:2015BS EN ISO 11665-5:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN
2、 ISO 11665-5:2015. It is identical to ISO 11665-5:2012. It supersedes BS ISO 11665-5:2012 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee NCE/2, Radiation protection and measurement.A list of organizations represented on this committee can be obtained
3、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 Standards Limited 2015ISBN 978 0 580 88250 0ICS 13.040.01; 17.240Compliance
4、 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 August 2012.Amendments/corrigenda issued since publicationDate Text affected31 October 2015 This corrigendum renumbers B
5、S ISO 11665-5:2012 as BS EN ISO 11665-5:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11665-5 September 2015 ICS 17.240 English Version Measurement of radioactivity in the environment -Air: radon-222 - Part 5: Continuous measurement method of the activity concentration (ISO 11665-5:20
6、12) Mesurage de la radioactivit dans lenvironnement - Air: radon 222 - Partie 5: Mthode de mesure en continu de lactivit volumique (ISO 11665-5:2012) Ermittlung der Radioaktivitt in der Umwelt - Luft: Radon-222 - Teil 5: Kontinuierliches Messverfahren fr die Aktivittskonzentration (ISO 11665-5:2012)
7、 This 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 refer
8、ences 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
9、 member 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
10、, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCH
11、ES 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 11665-5:2015 EBS ISO 11665-5:2012ISO 11665-5:2012(E) ISO 2012 All rights reserved iiiCo
12、ntents PageForeword ivIntroduction v1 Scope 12 Normative references . 13 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols . 14 Principle . 25 Equipment . 36 Sampling 36.1 Sampling objective . 36.2 Sampling characteristics . 36.3 Sampling conditions . 37 Detection 48 Measureme
13、nt 48.1 Procedure 48.2 Influence quantities 48.3 Calibration . 49 Expression of results . 59.1 Radon activity concentration . 59.2 Standard uncertainty 59.3 Decision threshold and detection limit . 59.4 Limits of the confidence interval . 510 Test report . 5Annex A (informative) Measurement method u
14、sing a vented ionization chamber and a current ionization chamber . 7Bibliography .13EN ISO 11665-5:2015 (E) 3 European foreword The text of ISO 11665-5:2012 has been prepared by Technical Committee ISO/TC 85 “Nuclear energy, nuclear technologies, and radiological protection” of the International Or
15、ganization for Standardization (ISO) and has been taken over as EN ISO 11665-5:2015 by Technical Committee CEN/TC 430 “Nuclear energy, nuclear technologies, and radiological protection” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard
16、, 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 drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN an
17、d/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 following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Cze
18、ch Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdo
19、m. Endorsement notice The text of ISO 11665-5:2012 has been approved by CEN as EN ISO 11665-5:2015 without any modification. BS EN ISO 11665-5:2015EN ISO 11665-5:2015 (E)BS ISO 11665-5:2012ISO 11665-5:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normative
20、references . 13 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols . 14 Principle . 25 Equipment . 36 Sampling 36.1 Sampling objective . 36.2 Sampling characteristics . 36.3 Sampling conditions . 37 Detection 48 Measurement 48.1 Procedure 48.2 Influence quantities 48.3 Calibrat
21、ion . 49 Expression of results . 59.1 Radon activity concentration . 59.2 Standard uncertainty 59.3 Decision threshold and detection limit . 59.4 Limits of the confidence interval . 510 Test report . 5Annex A (informative) Measurement method using a vented ionization chamber and a current ionization
22、 chamber . 7Bibliography .13BS EN ISO 11665-5:2015ISO 11665-5:2012(E)BS ISO 11665-5:2012ISO 11665-5:2012(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 nor
23、mally 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 committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in
24、the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all 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
25、International Standards. Draft International Standards adopted by the technical committees are circulated 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 o
26、f 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 11665-5 was prepared by Technical Committee ISO/TC 85, Nuclear energy, nuclear technologies, and radiological protection, Subcommittee SC 2, Radiol
27、ogical 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 short-lived decay products and associated measurement methods Part 2: Integrated measurement method for determining av
28、erage 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 Part 4: Integrated measurement method for determining average activity concentration using passive sampling and d
29、elayed 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 followi
30、ng parts are under preparation: Part 9: Method for determining exhalation rate of dense building materials Part 10: Determination of diffusion coefficient in waterproof materials using activity concentration measurementiv ISO 2012 All rights reservedBS ISO 11665-5:2012ISO 11665-5:2012(E)Introduction
31、Radon isotopes 222, 220 and 219 are radioactive gases produced by the disintegration of radium isotopes 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 lea
32、d are produced by radon disintegration1.When disintegrating, radon emits alpha particles and generates 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
33、or not they are attached to atmospheric aerosols, radon decay products can be inhaled and deposited 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,
34、at the worldwide level, radon accounts for around 52 % of global average exposure to natural radiation. 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 of IS
35、O 11665 refer only to radon-222.Radon activity concentration can vary by one to multiple orders of magnitude 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 m
36、aterials in each area and, secondly, on the degree of containment and weather conditions in the area where individuals are exposed.The values commonly found in the continental environment are usually between a few becquerels per cubic metre and several thousand becquerels per cubic metre. Activity c
37、oncentrations of one becquerel per cubic metre or less can be observed in the oceanic environment. Radon activity concentrations inside houses can vary from several tens of becquerels per cubic metre to several hundreds of becquerels per cubic metre3. Activity concentrations can reach several thousa
38、nds of becquerels per cubic metre in very confined spaces.The activity concentration of radon-222 in the atmosphere can be measured by spot, continuous and integrated measurement methods with active or passive air sampling (see ISO 11665-1). This part of ISO 11665 deals with continuous measurement m
39、ethods for radon-222.NOTE The origin of radon-222 and its short-lived decay products in the atmospheric environment and other measurement methods are described generally in ISO 11665-1. ISO 2012 All rights reserved vBS EN ISO 11665-5:2015ISO 11665-5:2012(E)BS ISO 11665-5:2012ISO 11665-5:2012(E)Forew
40、ordISO (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 which a technic
41、al 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 matters of el
42、ectrotechnical 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 circulated to the
43、 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 responsible for ident
44、ifying any or all such patent rights.ISO 11665-5 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 of radioactivit
45、y 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 measurement method of
46、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 measurement met
47、hod 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
48、10: Determination of diffusion coefficient in waterproof materials using activity concentration measurementiv ISO 2012 All rights reservedBS ISO 11665-5:2012ISO 11665-5:2012(E)IntroductionRadon isotopes 222, 220 and 219 are radioactive gases produced by the disintegration of radium isotopes 226, 224
49、 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 generates 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
