Grimsel Phase V extended from 1997 to 2004. The focus was on investigating geological barrier effectiveness, demonstration of disposal concepts and site characterisation investigations. All the projects were also designed to contribute to the further development of and assessment of modelling capabilities.
Although Phase V was originally scheduled to finish in 2003, a decision to extend the GMT, HPF and FEBEX projects was made to allow longer monitoring phases of these Engineered Barrier Experiments. Phase V saw the construction of a new cavern at the GTS and experience gained in the use of radionuclide tracers was built on during the investigations of the geological barrier.
GTS phase V can be grouped into three main areas of interest.
The Engineered Barrier System: FEBEX, GMT and FOM