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Studies on Sealing Performance of Clay Plug by the Tunnel Sealing Experiment

Published online by Cambridge University Press:  21 March 2011

S. Kawakami ,
T. Fujita ,
K. Masumoto  and
M. Yui
S. Kawakami
Affiliation:
Japan Nuclear Cycle Development Institute Tokai, Naka, Ibaraki 319-1194, Japan
T. Fujita
Affiliation:
Japan Nuclear Cycle Development Institute Tokai, Naka, Ibaraki 319-1194, Japan
K. Masumoto
Affiliation:
Kajima Corporation Minato, Tokyo 107-8502, Japan
M. Yui
Affiliation:
Japan Nuclear Cycle Development Institute Tokai, Naka, Ibaraki 319-1194, Japan
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Abstract

To establish sealing performance suitable for geological environmental conditions of Japan, it is necessary to obtain basic data related for the sealing function through laboratory and in-situ experiments. These data are to be used for practical design and to establish the method for analysis of the sealing performance.

Japan Nuclear Cycle Development Institute (JNC) has joined the international project, the Tunnel Sealing Experiment (TSX), to demonstrate the sealing performance of full scale plugs in-situ, and to develop analytical method of the sealing performance of the plugs at Underground Research Laboratory (URL) of Atomic Energy of Canada Limited (AECL) in Canada [1]. This experiment is in the final stage and fundamental data for the sealing function of clay and concrete plugs have been obtained.

This paper presents the total data handling and interpretation of the sealing experiment, as well as the numerical analysis and interpretation for clay plug performance based on tracer test results. As a result of the numerical analysis, the sealing performance of the clay plug was confirmed and it was shown that the excavation disturbed zones (EDZ) around the clay plug and the tunnel could be a dominant transport pathway for radionuclides.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 932: Symposium – Scientific Basis for Nuclear Waste Management XXIX , 2006 , 111.1
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCES

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