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J.F.Harrington*; S.T.Horseman*
JNC TJ7400 2000-016, 25 Pages, 2000/12
JNC-TJ7400-2000-016.pdf:0.98MB
The scope of the work commissioned by JNC(Japan)and described in this report was to conduct a series of laboratory experiments on a single specimen of clay-bearingfault gouge to provide information on hydraulic properties and the sensitivity of these properties to isotropic confining stress. The specimen was prepared so that the direction of flow was perpendicular to the strike of the fault zone.Controlled flow-rate experiments were performed at three levels of isotropic confining stress with a fixed backpressure. Hydraulic conductivities were calculated from steady-state pressure gradients and from analysis of the pressuretransients. Transient analysis also yielded values for specific storage. At confiningstresses of 3.5,7.5 and 13.5 MPa the average hydraulic conductivities based on analysis of steady-state pressure gradients were1.84x10-12m.s-1,1.79x10-13m.s-1and 7.9x10-14m.s-1.The equivalent values from analysis of the pressure transients were 2.09x10-12m.s-1,2.06x10-13m.s-1and 8.4x10
Yoshida, Hidekazu; Hama, Katsuhiro; West, J. M.*; Bateman, K.*; Milodowski, A. E.*; Baker, S. J.*; Coombs, P.*; Hards, V. L.*; Spiro, B.*; Wetton, P. D.*
JNC TJ7400 99-013, 68 Pages, 1999/07
In April 1997 the Japan Nuclear Cycle Development Institute (JNC)commissioned a Three-Task project from the Bretish Geological Survey (BGS). Task 1 was a continuation of work started in 1996 to examine microbial effects on redox and to quantify the effects of microbiological perturbations on the geological disposal of HLW(TRU). Task 2 was commissioned to provide information on theTsukiyoshi Fault for use in ongoing work at the Tono Geoscience Centre. Task 3 was to draft a Technical programme for use in ongoing work at the Tono Geoscience Centre.Task 3 was to draft a Technical programme for a geochemical study of the Tono site. This report details the results of Task 1, undertaken in 1998/99.
West, J. M.*
JNC TJ7400 99-006, 228 Pages, 1998/05
In April 1997 the Power Reactor and Nuclear Fuel Development Corporation (PNC) of Japan commissioned a Three Task projet from the British Geological Survey (BGS). Task 1 was a coutinuation of work started in 1996 to examine microbial effects on redox and to quantify the effects of microbiological perturbations on the geological disposal of HLW (TRU ). Task 2 was commissioned to provide information on the Tsukiyoshi Fault for use in ongoing work at the Tono Geoscience Centre. Task 3 was to publish the results of work undertaken in 1996/97 by attending two conferences. This report details the results of all the Tasks undertaken in 1997/98.
West, J. M.*; Aoki, Kazuhiro; Baker, S. J.*; Bateman, K.*; Coombs, P.*; Gillespie, M. R.*; Henney, P. J.*; Reeder, S.*; Milodowski, A. E.*; Yoshida, Hidekazu
JNC TJ7400 99-002, 117 Pages, 1997/01
In February 1996 the Power Reactor and Nuclear Fuel Development Corportation(PNC)of Japan commissioned a one year study from the British Geological Survey(BGS)to examine microbial effects on redox and to quantify the effects of microbiological perturbations on the geological disposal of HLW(TRU). The work was splitinto two tasks: Tas k 1:SKB REX Cooperation 'To perform laboratory experiments on bacterial processes to assess their influences on redox'.or Task 2:Microbiol ogical modelling the BGS developed code MGSE. This report details the results of Task 1.