via NHK World / June 25, 2013 / Officials from Tokyo Electric Power Company say the level of radioactive tritium has been rising in sea water near the Fukushima Daiichi nuclear power plant.
They say they can’t rule out the possibility that contaminated groundwater seeped into the sea.
TEPCO officials said on Monday that samples collected on Friday contained 1,100 becquerels of tritium per liter. That is 10 times the amount detected in previous tests.
But they said the figure is still less than one-fiftieth of the government-set limit for water to be released into the sea.
TEPCO workers said samples collected from wells on the sea side of the No. 2 reactor from late last month to early this month contained tritium and strontium above the official safety level.
TEPCO officials say they will study data from the sea and well samples to determine whether underground water seeped into the sea.
They said if their analysis confirms that’s what happened, they will use chemicals to solidify the ground.