As part of a waste management program, high-level nuclear liquid wastes will be treated in an evaporator to decrease volume and the residual liquor then stored underground in double-shell tanks for further processing. Typical solutions consist primarily of hydroxide, nitrate, nitrite, aluminate with minor amounts of several other anions and cations. The residual liquors can be further boiled down for more volume reduction to form a slurry. Alternatively, evaporator residual liquor can be partially neutralized with nitric acid followed by boiling down. The variety of evaporation, neutralization, and boiling combinations and heterogeneity of nuclear waste feed liquor result in a broad compositional range of residual liquors and slurries to be stored. It is necessary to determine the corrosivity of these processed wastes, broadly termed terminal solutions, to evaluate the reliability of double-shell tank storage.

Subject
Hydroxides, Composition, Nitrites, Potential range, Aluminates, Free corrosion potential, Nitrates, Steel, Risk reduction, Wastes, Corrosion potential, Stress corrosion cracking, Slow strain rate technique
© 1978 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).
1978
Association for Materials Protection and Performance (AMPP)
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