A chemical cleaning process has been developed in France in order to clean PWR steam generators in which denting occured. Based on the use of gluconic and citric acids in presence of an inhibitor, it allows long contact times. Although denting is not encountered in French nuclear power plants (NPP) the process has been used to clean the tube bundle at Tihange NPP, the tubesheet at Nogent and Saint-Alban NPPs and the tube to tube support plate crevices at Fessenheim NPP.

Subject
Materials, Nickel based alloys, Tubes, Chemical cleaning, Iron, Steam generators, Inspection, Crevices, Sludge, Solutions, Magnetite, Deposit corrosion, Cleaning
Keywords:
chemical cleaning, PWR, steam generator, Inconel 600, gluconic acid, citric acid, denting, tubesheet, tube support plate, tube bundle
© 1993 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1993
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.