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You need a hot and cold reservoir to generate power. Where is the heat going to go? This is why power plants are often built on rivers or near the ocean.


you need to pump water, probably flooding 80% of the mine. Since there are no humans involved 70+ celsius is not a problem.


The heat still has to be managed, otherwise Kyshtym[1] happens. 160 tons of flying concrete is no joke.

https://en.m.wikipedia.org/wiki/Kyshtym_disaster




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