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Correct me if I am wrong but USSR installed hundreds of nuclear-powered light houses across the arctic coast. Many were neglected.

Edit: https://www.bbc.com/reel/video/p0931jtk/the-nuclear-lighthou...

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While those USSR generators are indeed nuclear-powered, they use a completely different method from nuclear plants. They simply convert the decay heat of a radioactive material into energy, and as such aren't subject to any drastic reactions such as meltdowns.

More info: https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_ge...

The neglect was largely associated with the fall of the USSR and their economy. While this should be a scenario we should be concerned about, I don't think it is particularly relevant to the conversation and certainly not a coup d'etat

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