IEC_TR_61577-5-2019.pdf

IEC TR 61577-5 Edition 1.0 2019-07 TECHNICAL REPORT Radiation protection instrumentation Radon and radon decay product measuring instruments Part 5:General properties of radon and radon decay products and their measurement methods IEC TR 61577-5:2019-07(en)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2019 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,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb infoiec.ch CH-1211 Geneva 20 www.iec.ch Switzerland About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigendum or an amendment might have been published.IEC publications search-webstore.iec.ch/advsearchform The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and once a month by email.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:salesiec.ch.Electropedia-www.electropedia.org The worlds leading online dictionary on electrotechnology,containing more than 22 000 terminological entries in English and French,with equivalent terms in 16 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary 67 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC TR 61577-5 Edition 1.0 2019-07 TECHNICAL REPORT Radiation protection instrumentation Radon and radon decay product measuring instruments Part 5:General properties of radon and radon decay products and their measurement methods INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 13.280 ISBN 978-2-8322-7123-0 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinside 2 IEC TR 61577-5:2019 IEC:2019 CONTENTS FOREWORD.5 1 Scope.7 2 Normative references.7 3 Symbols,quantities and units.8 3.1 Symbols.8 3.2 Quantities and units.9 4 Radon in the environment.9 4.1 Origin,genesis and decay.9 4.2 Radon in the rocks and soils and its transport towards the atmosphere.10 4.3 Radon concentration in the outdoor air.11 4.4 Radon concentration in houses and at workplaces.11 5 Radon decay products in the atmosphere.12 5.1 Physical processes of decay products in gaseous media.12 5.2 Aerosol characteristics and ventilation.13 6 Physical and chemical properties of radon and radon decay products.14 6.1 Physical and chemical properties.14 6.2 Solubility of radon in liquids.14 6.3 Radiological properties and radioactive equilibrium.15 6.4 Interaction of alpha particles with matter and energy deposition.17 7 Measurement of 222Rn and 220Rn and their decay products.18 7.1 Relevant measurement quantities and units.18 7.1.1 Activity concentration(C).18 7.1.2 Equilibrium equivalent activity concentration(EEC,Ceq).18 7.1.3 Equilibrium factor(F).19 7.1.4 Exposure to radon(PRn).19 7.1.5 Potential alpha energy(p).20 7.1.6 Potential alpha energy concentration(Cp).20 7.1.7 Potential alpha energy exposure(Pp).22 7.1.8 The unattached and attached fraction of potential alpha energy concentration.22 7.2 Instruments measuring airborne radon activity concentration.22 7.3 Measurement of radon decay products.23 7.3.1 General overview of instruments.23 7.3.2 Sampling of the unattached radon decay products.24 7.3.3 Counting methods for the measurement of the activity concentrations and the potential alpha-energy concentration.25 8 Quality assurance.30 8.1 Definition and purpose.30 8.2 Quality control.31 8.3 Validation and traceability of measurements.31 8.3.1 Validation of methods.31 8.3.2 Type test of radon instruments.31 8.3.3 Interlaboratory comparison.31 8.3.4 Measurement traceability and calibration.32 9 Dete