While the context of George Monbiot’s article on nuclear energy is British politics, it’s directly relevant to the US as well.
Ten cents of investment, he shows, will buy either 1 kilowatt-hour of nuclear electricity; 1.2-1.7 of windpower; 2.2-6.5 of small-scale cogeneration; or up to 10 of energy efficiency. “Its higher cost than competitors, per unit of net CO2 displaced, means that every dollar invested in nuclear expansion will worsen climate change by buying less solution per dollar.” And, because nuclear power stations take so long to build, it would be spent later. “Expanding nuclear power would both reduce and retard the desired decrease in CO2 emissions.”
It’s certainly a good idea, as people like Sir David recommend, to have a “diversified energy portfolio”. But, as Lovins points out, “this does not mean … that every option merits a place in the portfolio purely for the sake of diversity, any more than a financial portfolio should include bad investments just because they’re on the market.” Building new nuclear power stations in the United Kingdom would be a political decision, not a scientific one.