ISO INTERNATIONAL STANDARD 21243 Second edition 2022-11 Radiation protection Performance criteria for laboratories performing initial cytogenetic dose assessment of mass casualties in radiological or nuclear emergencies General principles and application to dicentric assay Radioprotection - Criteres de performance pour les laboratoires en cas d'accident radiologique ou nucléaire affectant un grand nombre de personnes - Principes généraux et application au test dicentrique Reference number IS0 21243:2022(E) ISO @ IS0 2022 IS0 21243:2022(E) COPYRIGHTPROTECTEDDOCUMENT @ISO:2022 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: +4122 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2022 - All rights reserved