ISO INTERNATIONAL STANDARD 11311 First edition 2011-07-01 AMENDMENT 1 2022-12 Nuclear criticality safety Critical values for homogeneous plutonium- uranium oxide fuel mixtures outside of reactors AMENDMENT 1: Corrections and clarifications Sureté-criticité - Valeurs critiques pour oxydes mixtes homogenes de plutonium et d'uranium hors réacteurs AMENDEMENT 1: Corrections et clarifications Reference number IS0 11311:2011/Amd.1:2022(E) ISO @IS02022 IS0 11311:2011/Amd.1:2022(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 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 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 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @IS02022-Allrightsreserved