National Geological Screening for a GDF - Bristol and Gloucester region
This screening report hosted on this site is a technical exercise across England, Wales and Northern Ireland. No specific location in England, Wales or Northern Ireland has been identified as a potential GDF site. Any future decision on geological disposal would be subject to community agreement and planning and environmental consents.
Our work shows that we may find a suitable geological setting for a GDF in most of this subregion.
Rock can be seen at the surface in some of the subregion such as the cliffs along the western edge of the Cotswolds and in man-made excavations such as quarries or road cuttings. Combined with some deep boreholes and geophysical investigations, this gives us an understanding of the rocks present and their distribution.
There are clay-rich rock layers under the whole subregion in which we may be able to site a GDF. We would need to do more work to find out whether these rocks have suitable properties and thicknesses. Even where individual clay-rich rock layers are found not to be thick enough to host a GDF they may support the siting of a GDF in deeper rocks as they could act as a barrier to groundwater flow from depth. This is important because movement of groundwater is one of the ways in which radioactive material could be carried back to the surface.
For further information, read the report below.
We have also produced a summary of the geological attributes of the Bristol and Gloucester Region.