This is terrible news. Nuclear power, while not perfect, is one of the best alternatives we have to carbon-emitting power plants. If there are no companies left to build them, the already impossible task of fighting climate change will get that much harder.
This narrative holds only so long as one completely disregards the potential extinction-level event that continues at Fukushima. The simple fact of the matter is no technology exists to adequately and safely address the worst-case failure scenarios. We would do better to pump more CO2 into the atmosphere, whilst reversing deforestation during a transition to solar than to build even one more nuclear plant.
I agree that Fukushima could get hella messy if not dealt with right over the next decades.. but 'extinction level' seems a tad dramatic?