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Migration of Cesium, Strontium and Cobalt in Water-Saturated Concretes

Published online by Cambridge University Press:  28 February 2011

K. Idemitsu ,
H. Furuya ,
R. Tsutsumi ,
S. Yonezawa ,
Y. Inagaki  and
S. Sato
K. Idemitsu
Affiliation:
Department of Nuclear Engineering, Kyushu University, Fukuoka, JAPAN
H. Furuya
Affiliation:
Department of Nuclear Engineering, Kyushu University, Fukuoka, JAPAN
R. Tsutsumi
Affiliation:
Department of Nuclear Engineering, Kyushu University, Fukuoka, JAPAN
S. Yonezawa
Affiliation:
Department of Nuclear Engineering, Kyushu University, Fukuoka, JAPAN
Y. Inagaki
Affiliation:
Department of Nuclear Engineering, Kyushu University, Fukuoka, JAPAN
S. Sato
Affiliation:
Department of Nuclear Engineering, Hokkaido University, Sapporo, JAPAN.
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Abstract

Diffusivities of Cs, Sr and Co were measured in several kinds of water-saturated concretes. The measured penetration profile of every tracer was composed of two parts. Those were a steep slope near the surface and a gradual slope in the deeper part. This profile was successfully explained by considering two diffusion paths in concrete. One diffusion path was possibly fissure with a width of a few microns and another was network of submicron pores. The volume of submicron pores was approximately 90% of the total free space volume in every concrete. The orders of magnitude of apparent diffusivities for all tracers were 10−12–10−11 m2/s through the fissure and l0−16–10−15 m2/s through the network of pores. The difference between the diffusivities of the two paths is thought to be caused by small geometrical factor of the network of submicron pores.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 212: Symposium P – Scientific Basis for Nuclear Waste Management XIV , 1990 , 427
Copyright
Copyright © Materials Research Society 1991

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References

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