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Behavior of Carbon-14 in Waste Packages for Spent Fuel in a Repository in Tuff

Published online by Cambridge University Press:  26 February 2011

R. A. Van Konynenburg ,
C. F. Smith ,
H. W. Culham  and
C. H. Otto Jr.
R. A. Van Konynenburg
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550
C. F. Smith
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550
H. W. Culham
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550
C. H. Otto Jr.
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550
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Abstract

Analysis of gas from a heated air-filled canister containing a spent fuel assembly before and after rupture of a fuel rod shows that about 1.5 mCi of 14C from the external surface of the assembly was rapidly oxidized and released as 14CO2 in excess oxygen at 275°C and 104rad/hr. After rupture, an additional 0.3 mCi was released, probably also from the external surface. The total 14C inventory in the entire 15×15 rod assembly including structural hardware is estimated to be 690 mCi. These measurements indicate that account will have to be taken of the time distribution of lifetimes of the canisters, and a broad definition of the “engineered system” may be necessary, in order to meet 1OCFR60 requirements with spent fuel in a repository in tuff.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 44: Symposium N – Scientific Basis for Nuclear Waste Management VIII , 1984 , 405
Copyright
Copyright © Materials Research Society 1985

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