12 tones of highly radioactive water leaked to the sea again. It leaked from the part after desalination unit, but because it can’t filter beta nuclides, Sr-90 and other nuclides have already leaked to the sea.
However, the leaked water contained 16.7E+6Bq/m3 of cesium too.
The flow from desalination unit to the tank increased by 140% at 0:06~0:13 4/5/2012, it automatically stopped.
At 0:50~1:10 4/5/2012, because a nuclear worker tried to restart the facility for 3 times, 3~4 tones of additional water leaked. Around at 2:20 4/5/2012, water leakage was stopped, Tepco reports.
The joint of the pipes was taken off to leak water. Tepco states, they are going to change the joint parts to the ones with bolt, made of polyethylene. The joint parts are made by kanaflex corporation co, used for every joint part of the pipes. There are a few thousands of joints in the site.