ISO INTERNATIONAL STANDARD 11665-9 Second edition 2019-05 Measurement of radioactivity in the environment Air: Radon-222 Part 9: Test methods for exhalation rate of building materials Mesurage de la radioactivite dans I'environnement - Air: Radon 222- Partie 9: Methode de détermination du flux d'exhalation des matériauxdeconstruction Reference number ISO 11665-9:2019(E) @ IS0 2019 IS0 11665-9:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +4122 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland i @ IS0 2019 - All rights reserved IS0 11665-9:2019(E) Contents Page Foreword .iv Introduction V 1 Scope. 1 2 Normative references .1 3 Terms, definitions and symbols 1 3.1 Terms and definitions 1 3.2 Symbols. 2 4 Principle 5 Reagents and equipment 4 5.1 Reagents. 4 5.2 Equipment for sample preparation 5 5.3 Equipment for procedure. 5 5.4 Test bench .6 6 Building material test sample preparation .7 6.1 General 7 6.2 Number and dimensions 8 6.2.1 General 8 6.2.2 End product. 8 6.2.3 Fluid intermediate materials 8 6.3 Conditioning 8 6.3.1 End products .8 6.3.2 Fluid intermediate materials 9 7 Measurement .9 7.1 General 9 7.2 Set up of test bench. 9 7.2.1 Choice of volume flow rate. .9 7.2.2 Determination of amount of adsorbent material 10 7.2.3 Determination of minimum desorption duration 10 7.2.4 LSC procedure. 10 7.3 Measurement procedure 11 8 Expression of results. .13 8.1 General 13 8.2 Free exhalation rate 13 8.3 Standard uncertainty. 13 8.4 Decision threshold. 14 8.5 Detection limit. 15 9 Test report. .15 Annex A (informative) Method for determination of free radon exhalation rate of mineral- based building materials - Total count determination using gamma-ray spectrometry...16 Annex B (informative) Method for determination of free radon exhaiation rate of minerai based building materials - Determination by nuclide-specific gamma-ray spectrometry .26 Annex C (informative) Performance characteristics. .38 Bibliography .39 @ IS0 2019 - All rights reserved iii