Those opposed to nuclear power frequently make the claim that it has always relied on a significant amount of public subsidies and doesn't make sound economic sense, even considering any environmental and security of energy supply advantages. The industry counters by accepting that as a developing technology, nuclear received subsidies in the past, but as a mature technology today should be able to attract financial investors without any degree of governmental support. There are three main areas where, broadly speaking, subsidies or other support for energy may apply: government research and development (R&D) for particular technologies; subsidies for power generation per unit of production (or conceivably per unit of capacity); and the allowance of external costs which are either paid by the community at large or picked up later by governments.
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