This underground laboratory is a research tool to analyse the effects of radioactive waste storage in the Callovo-Oxfordian rock clay layer to be studied. The objectives of the investigations conducted in the underground installations are as follows:

 

- To check the constructability and reversibility potential for possible storage in the Callovian-Oxfordian formation.

- To confirm the containment properties of this formation.

- To check its geological homogeneity.

 

 The work involves the building an access shaft 5 metres in diameter and 508 metres deep, an auxiliary shaft 4 metres in diameter and 500 meters deep, and a network of underground investigation tunnels for a total length of approximately 1,200 m.

 

As part of this project, the companies are responsible for the preliminary project study phase, its execution, confirmation drilling programme, construction of underground structures and installation of permanent facilities.