The mechanical failures were compounded Cause_to_amalgamate by the initial failure of plant operators to recognize Know the situation as a loss-of-coolant accident due to inadequate Cause_to_make_progress training Practice and human factors , such as human-computer interaction design oversights relating to ambiguous control room indicators in the power plant 's user interface .

The resultant loss-of-coolant accidents led to Causation three nuclear meltdowns , three hydrogen explosions , and the release of radioactive contamination in Units 1 , 2 and 3 between 12 and 15 March .