GEOLOGICAL ASSESSMENT OF CRYSTALLINE ROCK FORMATIONS WITH A VIEW TO RADIOACTIVE WASTE DISPOSAL
The report describes work carried out under Contract No 128-80-7 WAS UK between January 1980 and December 1982. Field work has been concentrated at the Altnabreac Research Site in north-east Scotland, where three deep boreholes to approximately 300 m and 24 shallow boreholes to approximately 40 m were drilled. The movement of groundwater within 300 m of the surface was investigated using a specially developed straddle packer system. Geochemical studies have demonstrated that most groundwater is dominated by recent recharge but one borehole zone yielded water with an age of around 10**4 years. Geophysical borehole logging has shown that the full wave train sonic logs and the acoustic logs show most promise for the assessment of crystalline rocks. In the laboratory the interaction of rocks and groundwater at the temperature - pressure conditions to be expected in a repository has established the geochemical environment to which waste canisters and backfill materials would be subjected. Other generic studies reported include the characterization of geotechnical properties of rocks at elevated temperatures and pressures, the development of a new cross hole sinusoidal pressure test for the measurement of hydraulic properties and the use of thermal infrared imagery to detect groundwater discharge zones.
Bibliographic Reference: EUR 8828 EN (1984) FS, 117 P., BFR 400, EUROFFICE, LUXEMBOURG, POB 1003
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Record Number: 1989122055200 / Last updated on: 1987-01-01
Available languages: en