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Initial Results From Dissolution Testing of Spent Fuel Under Acidic Conditions

Published online by Cambridge University Press:  17 March 2011

Brady D. Hanson ,
Judah I. Friese  and
Chuck Z. Soderquist
Brady D. Hanson
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A., brady.hanson@pnl.gov
Judah I. Friese
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A., brady.hanson@pnl.gov
Chuck Z. Soderquist
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A., brady.hanson@pnl.gov
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Abstract

Flowthrough dissolution tests using solutions with pH in the range 2 to 7 have been conducted on a moderate burnup Light Water Reactor spent fuel. Such low pH conditions have been modeled as possibly occurring in a failed waste package at the proposed repository at Yucca Mountain. The release oftotal uranium, 99Tc, 90Sr, 137Cs, and 239&240Pu were measured for up to 90% total reaction of the specimens. The reaction rates, determined both from the cumulative release and the release normalized to surface area, were found to decrease with increasing pH and with increasing extent of reaction. The implications to instantaneous release and long-term behavior ina geologic repository are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 824: Symposium CC – Scientific Basis for Nuclear Waste Management XXVIII , 2004 , CC8.6
Copyright
Copyright © Materials Research Society 2004

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