ISO INTERNATIONAL STANDARD 20956 First edition 2023-09 Radiological protection Low dose rate calibration of instruments for environmental and area monitoring Radioprotection - Etalonnage d'instruments a faible debit de dose pour la surveillance de zone et de I'environnement Reference number IS0 20956:2023(E) ISO @IS02023 IS0 20956:2023(E) COPYRIGHT PROTECTED DOCUMENT @IS02023 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, withoutpriorwrittenpermission.Permission can berequestedfrom eitherIso at theaddress below orIso'smemberbodyinthecountryoftherequester. 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 ii @IS0 2023 - All rights reserved