FINAL INTERNATIONAL ISO/FDIS DRAFT STANDARD 11665-7 ISO/TC85/SC2 Measurement of radioactivity in the Secretariat:AFNOR environment Air: radon-222 Voting begins on: 2012-03-22 Part 7: Voting terminates on: Accumulation method for estimating 2012-05-22 surface exhalation rate Mesurage de la radioactivité dans I'environnement — Air: radon 222 Partie 7: Methode d'estimation du flux surfacique d'exhalation par la methode d'accumulation RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEYAREAWAREANDTOPROVIDESUPPOR TING DOCUMENTATION. Reference number BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO- LOGICAL, COMMERCIAL AND USER PURPOSES ISO/FDIS 11665-7:2012(E) DRAFT INTERNATIONAL STANDARDS MAY ON ISO OCCASIONHAVE TOBECONSIDEREDINTHE LIGHT OF THEIR POTENTIAL TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE MADE IN Copyright Intemational Organizationfor StandardizationNS @ISO2012 IHS unde ut license from IHS Not for Resale ISO/FDIS 11665-7:2012(E) Copyright notice This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted under the applicable laws of the user's country, neither this IsO draft nor any extract from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording or otherwise, without prior written permission being secured. Requests for permission to reproduce should be addressed to either IsO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22749 09 47 E-mail copyright@iso.org Web www.iso.org Reproduction may be subject to royalty payments or a licensing agreement. Violators may be prosecuted. ISO 2012-All rights reserved Norepr etworking permitted without license from IHS Not for Resale ISO/FDIS 11665-7:2012(E) Contents Page Foreword ..iv Introduction 1 Scope. 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions.. 3.2 Symbols.. 2 4 Principle of the measurement method for estimating surface exhalation rate. .2 5 Equipment 6 Accumulation of radon in a container 5 6.1 Accumulation characteristics. 5 6.2 Accumulationduration 5 7 Sampling.... 5 7.1 Sampling objective 5 7.2 Sampling characteristics. 5 7.3 Sampling duration. 7.4 Volume of air sampled. 6 8 Detection method 9 Measurement. 9.1 Procedure.. 9.2 Influence quantities, 10 Expression of results 10.1 Radon surface exhalation rate 10.2 Standard uncertainty... 10.3 Decision threshold and detection limit 10.4 Limits of the confidence interval.. 8 11 Test report.. 8 Annex A (informative) Example of a sample results sheet. 10 Annex B (informative) Estimation of radon surface exhalation rate using a continuous measurement method . 12 Annex C (informative) Estimation of radon surface exhalation rate using a spot measurement method18 Bibliography... ili ed without license from IHS Not for Resale