Here's what Chris Williams writes in his article Hothouse Earth: Capitalism, climate change and the fate of humanity, in the March-April 2009 issue of International Socialist Review:
Nuclear power is expensive and dangerous. Nuclear power stations only emerge as cost competitive with fossil-fuel power stations or alternative energy sources when government subsidies and the huge decommissioning costs are not included as part of the cost of building and running them.
Williams' critique of nuclear power concludes that nuclear power plants are expensive, "wildly inefficient and extremely dangerous,"The fact that the plants double up as atomic bomb factories is what attracts the US and other countries to nuclear power, "not its environmental benefits."
This is the second part of a two-part article by Chris Williams available at www.isrevierw.org/issues/62/feat-hothouseearth.shtml. Powerful reading.