Via NHK News :
" Tokyo Electric Power Company is monitoring one of the reactors at the Fukushima Daiichi nuclear plant to determine whether more water could be pumped inside to cool the fuel rods.
Tokyo Electric plans to submerge the fuel rods at 2 reactors in water by July this year.
On Wednesday morning, the utility increased the amount of water injected into the No.1 reactor from 6 tons per hour to 10 tons per hour on an experimental basis.
As a result, the temperature at the top of the reactor was 107.3 degrees Celsius Thursday morning, down 24.7 degrees from before the water increase. The temperature at the bottom of the reactor had dropped 12 degrees to 98.5 degrees Celsius.
Pressure inside the reactor containment vessel was also down.
Tokyo Electric says it's not yet known how deep the water inside the reactor container is, but that no leakage outside the reactor building has been confirmed.
The utility had initially planned to increase the amount of water injected to 14 tons per hour on Wednesday, but it says it will continue to monitor temperatures and pressure through Thursday evening."
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