Technischer Bericht NTB 89-01

One of the general objectives of developing the Grimsel Test Site is to increase know-how in planning, conducting and interpreting underground tests, and also to increase the level of practical experience in the operation of test equipment.

In relation to the hydrogeologic investigations, the aim was specifically to build confidence in routine tasks planned for hydrologic investigation of potential repository sites. Another purpose was to acquire know-how within the Swiss technical community. The Swiss firm SOLEXPERTS acquired knowledge regarding:

• investigation techniques and
• analysis methods.

This capability corresponds to the level of technology presently available in the area of hydrologic testing in boreholes.

This report describes the development and application of hydrologic test systems and testing techniques from 1985 to 1987. In addition, the analysis methods and various testing results are presented.