The body criticised the government's decision to go ahead with new nuclear, despite the reservations of members of the public.
"Some of the most crucial questions around nuclear energy, cited as major concerns by people on all sides in the recent consultation, remain unanswered," said the SDC Energy Commissioner Bernie Bulkin.
"It would be totally irresponsible to commission a new generation of nuclear power stations when there is no clear consensus on how to deal with the nuclear waste they will produce.
"And we have serious concerns over the role of the private sector, with the ever-present risk that the British taxpayer will be asked to pay for any cost over-runs that may occur - particularly considering the history of over-optimism in the nuclear industry.
"Unless the country can reach a real consensus, with solid answers to legitimate concerns over waste and liabilities, the SDC believes that a new generation of nuclear power stations remains the wrong option.
"The Government should instead be focusing on delivering more sustainable methods of generating electricity, and on absolute reductions in our demand for energy," he said.