Abstract
Many countries raised their interest in a participatory mechanism concerning project management of High Radioactive Waste (HLW). Nevertheless, the participatory mechanism does not always guarantee an increase in social trust and acceptance of the project. By reviewing the French CNDP, this paper analyzes the participatory mechanism and attempts to clarify the factors impeding an increase in social trust and support through deliberation. The current paper discusses that the lack of policy uptake and failure of an explicit goal setting of the debate are the fundamental issues despite the quality outcome of the participatory mechanism.