Debt financing means you're funding that project in the long term, even if the costs are technically up front. Promises of long lifespans let estimates per year drop, which allows a higher budget to be approved. And reactors are not cheap: http://www.thestar.com/business/article/665644
They may seem cheap if you cut corners, bury costs in the energy department of a country as a whole, ignore massive cost overruns in building these things, or ignore the potential cleanup cost that only governments are willing to pay for and therefore never truly appears on a ledger beforehand (in the form of insurance).
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Debt financing means you're funding that project in the long term, even if the costs are technically up front. Promises of long lifespans let estimates per year drop, which allows a higher budget to be approved. And reactors are not cheap: http://www.thestar.com/business/article/665644
They may seem cheap if you cut corners, bury costs in the energy department of a country as a whole, ignore massive cost overruns in building these things, or ignore the potential cleanup cost that only governments are willing to pay for and therefore never truly appears on a ledger beforehand (in the form of insurance).