ISO INTERNATIONAL STANDARD 20890-4 First edition 2020-06 Guidelines for in-service inspections for primary coolant circuit components of light water reactors - Part 4: Visual testing Lignes directrices pour les controles periodiques des composants du circuitprimairedesréacteursa eaulegere Partie 4: Examen visuel Referencenumber IS020890-4:2020(E) ISO @ISO2020 IS020890-4:2020(E) COPYRIGHTPROTECTEDDOCUMENT ISO2020 All rights reserved. Unless otherwise specified,or required in the context of its implementation, no part of this publication may below orIso's memberbody in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax:+4122749 09 47 Email: copyright@iso.org Website:www.iso.org Published in Switzerland i @ IS0 2020 - All rights reserved

ISO 20890-4 2020 Guidelines for in-service inspections for primary coolant circuit components of light water reactors — Part 4 Visual testing

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