Large amounts of deadly radioactive molten nuclear fuel remained inside the reactors. Robotic probes have provided some information, but the status of the molten debris is virtually unknown. The cleaning supervisor says the job was “incredibly difficult”.
Experimental extraction of molten remains will begin at Unit 2 later this year. Removal of spent fuel from Unit 1’s cooling pool will begin in 2027. As all spent fuel will be removed in 2031, attention will be focused on recovering molten residues from reactors.
Some experts say that even by 2051 it will be impossible to clean up all molten fuel residues.
Source: Ferra
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