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A Theoretical Study of the Effect of the Leach Interval on a Semidynamic Leach Test (Ansi/Ans-16.1-1986)

Published online by Cambridge University Press:  21 February 2011

Roger D. Spence  and
Richard L. Cox
Roger D. Spence
Affiliation:
Oak Ridge National Laboratory, Post Office Box 2003, Oak Ridge, TN 37831-7273
Richard L. Cox
Affiliation:
Oak Ridge Gaseous Diffusion Plant, Post Office Box 2003, Oak Ridge, TN 37831-7053
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Abstract

Numerical solution of Fick's second law of diffusion demonstrated that the error introduced in the ANSI/ANS-16.1-1986 procedure, by assuming a zero surface concentration, varied from about 30% for a leachability index of 5 to about 0.1% for an index of 10. Waste forms typically have indexes of 7 or greater, implying errors of less than 5% with this assumption. The estimated leachability index differs from the actual value by less than 0.2 when the numerical solution is analyzed as input experimental data, except for a leachability index as low as 5 (essentially the value for water).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 176: Symposium U – Scientific Basis for Nuclear Waste Management XIII , 1989 , 101
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

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