Well, in the end someone has to pay the costs and that is the tax payer. That is why amongst the choices for energy production, the overall cheapest is the most

Well, in the end someone has to pay the costs and that is the tax payer. That is why amongst the choices for energy production, the overall cheapest is the most popular. The state can help boost a new technology with subsidies, but in the long term, technologies have to be cost-effective. And nuclear power plants have a very bad track record on this, especially recent projects. The navy is not really a good comparison. First of all, they have large budgets and somewhat different risk tolerances than civil engineering. Powering submarines by solar power is also not a reasonable concept :p But Germany has some fuel-cell driven submarines, which get many benefits of nuclear ones, but of course with much shorter deployment times (max. 30 days).