International Standard IS08690 Measurement of radioactivity - Third edition Gamma ray and beta emitting 2024-09 radionuclides Test method to assesstheease ofdecontamination of surface materials Mesuragedelaradioactivité-Radionucleidesémetteurs gamma etbeta-Méthoded'essaipourévaluerI'aptitudea la decontaminationdesmateriauxdesurface Referencenumber ISO8690:2024(en) ISO2024 IS08690:2024(en) COPYRIGHTPROTECTEDDOCUMENT IS02024 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 bodyin the country oftherequester. ISO copyright office CP 401: Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email:[email protected] Website:www.iso.org Published in Switzerland @ IS0 2024-All rights reserved ii Is08690:2024(en) Contents Page Foreword .iv Introduction ..V 1 Scope 1 2 Normativereferences .1 3 Terms,definitions and symbols .2 2 3.1 Terms and definitions 3.2 Symbols. .3 4 Principle 4 5 Apparatus. .4 5.1 Beakers. 5.2 Radiation detector. .4 5.3 Pipettes. .5 5.4 Twopolytetrafluoroethylene(PTFE)orquartzampoules 5 5.5 .5 Storagebottles. 5.6 Mounting .5 5.7 Cage-stirrerapparatus .6 6 Contaminationanddecontaminationagents 6 6.1 Contaminantsolutions .6 6.1.1 Compositionofcontaminantsolutions .6 6.1.2 Preparation of the contaminant solutions .6 6.1.3 Preparationofcontaminantsolutionusingneutronactivation .7 .7 6.1.4 Storageofthecontaminantsolution. 6.2 Decontaminantsolution. .8 7 Testspecimens .8 7.1 Preparationand preliminarytesting .8 7.1.1 Resistancetocleaning solution .8 7.1.2 Testspecimensofnon-metallicmaterials 7.1.3 Testspecimensofmetallicmaterials ..8 7.2 Numberanddimensions. ..9 7.3 Conditioningand cleaning. .9 Procedure 9 8 8.1 Determiningthe specificpulserateofeach contaminant solution 8.2 Contamination. .10 8.3 Decontamination 12 8.4 Determining theresidual pulserate .13 9 Calculationofresultsandassessmentofeaseofdecontamination .14 10 Testreport .14 AnnexA(informative)Holderforcontaminationoftestspecimen ..16 AnnexB(normative)Cage-stirrerapparatusfordecontamination ..18 AnnexC (informative)Formulaeforpreparationofthe137Csand6oCocontaminantsolutions .27 Annex D (informative)Calculations forthe production of the contaminant solutionusing 30 neutronactivation .32 AnnexE(informative)Exampleofatestreport Bibliography .34 IS0 2024-All rights reserved ili