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Suitability of Bioapatite as Backfill Material for Nuclear Waste Isolation

Published online by Cambridge University Press:  25 January 2013

A.J. Finlay ,
A.E. Drewicz ,
D.O. Terry Jr. ,
D.E. Grandstaff  and
Richard D. Ash
A.J. Finlay
Affiliation:
Earth and Environmental Science, Temple University, Philadelphia, PA 19122USA
A.E. Drewicz
Affiliation:
Earth and Environmental Science, Temple University, Philadelphia, PA 19122USA
D.O. Terry Jr.
Affiliation:
Earth and Environmental Science, Temple University, Philadelphia, PA 19122USA
D.E. Grandstaff
Affiliation:
Earth and Environmental Science, Temple University, Philadelphia, PA 19122USA
Richard D. Ash
Affiliation:
Department of Geology, University of Maryland, College Park, MD 20742USA
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Abstract

Bioapatite, found in vertebrate bones and teeth, is highly reactive and may incorporate high concentrations of some radionuclides, including U, Pu, and Sr. Therefore, bioapatite may be useful in backfill or overpack materials in nuclear waste repositories. The dissolution rate for bioapatite is constant at pH > 4 and is about 5 times faster than fluorapatite. In terrestrial environments, bioapatite recrystallizes over periods of up to ca. 40 ka.

Keywords

biomaterialwaste managementdiffusion
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1518: Symposium LL – Scientific Basis for Nuclear Waste Management XXXVI , 2012 , pp. 191 - 196
Copyright
Copyright © Materials Research Society 2013 

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