That green party estimate is so laughable I'm not even going to comment on it further.
The WHO states it could be up to 4,000 in the long term, but may be substantially lower. The UN Committee on the Effects of Atomic Radiation concluded that even this figure is far too high.
Harvard university says that 8.7 million people die from greenhouse gas emissions each year. And that doesn't even account for direct accidents from generation and coal/gas extraction. Having a nuclear base load would save millions of lives, and do a huge amount to curb fossil fuel emissions. But "greens" want us to keep burning fossil fuels.