Well you Privatise and you then make a decision that bins the companies' profits of course they'll sue.
EDIT/ Found this - Ukania:
"In 2005 the cost of decommissioning these sites was planned at ?55.8 billion, with Sellafield requiring ?31.5 billion. However in 2006 the NDA reported that the cost of cleaning up existing waste was higher than previously thought, and gave a new estimated decommissioning cost of about ?72 billion over a 100 year period. In 2008 estimated decommissioning costs increased to ?73.6 billion, or after taking account of discount rates ?44.1 billion. A 2006 estimate foresaw ?14bn of offsetting income from reprocessing fuel at Sellafield. In 2009 the NDA sold land near three existing reactor sites for expected new nuclear power stations, for over ?200m."
Even with decommissioning costs added in, nuclear power still costs half of what the equivalent power generation would cost in renewables.
The most efficient and "green" method of moving forward with energy production would be having nuclear as the load bearer and renewables as the backup.