Fukushima reactors 3 and 4, nearly 8 billion Bq/m3 of cesium tainted water leaked

4.2 tones of highly contaminated water leaked on the first floor of reactor4. It contains 7,700,000,000 Bq/m3 of cesium.

Around 11:15 on 8/14/2012, a nuclear worker found the contaminated water leaking in one of the rooms on the first floor of reactor 4. (1cm deep, in a room of 350 m2)

Tepco explains it was from a pressure hose used to drain the contaminated water in reactor3. Tepco says the water was contained in the reactor building.

Original story here:

http://fukushima-diary.com/2012/08/re...ater-pipe/

Check the explanatory diagram as well as the photo of radioactive water being drained via plastic hoses sealed with duct tape. Also includes a link to the original Tepco article.