TOKYO (Kyodo) -- Tokyo Electric Power Co., the operator of the crisis-hit Fukushima Daiichi nuclear plant, said Friday it is highly likely that coolant water injected by fire trucks immediately after the accident on March 11, 2011 did not fully reach reactor cores where meltdowns occurred.
TEPCO, which has been looking into developments at the plant in the early days of the disaster, said it has confirmed that water supplied by fire trucks flowed into some pipes not leading to cores at the Nos. 1 to 3 reactors.
The utility said the amount of coolant water provided by fire trucks as an emergency measure was several times the amount needed to cool reactor cores, but part of the water was unexpectedly diverted to pipes not connected to the cores.
The company also said workers could not operate valves to keep coolant water from flowing into unintended pipes due to high dose of radiation at the plant.
TEPCO said if the prepared water was fully injected from fire trucks into reactor cores, it could at least have slowed melting of the fuel.
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