TEPCO reported the estimate at a meeting of the government's task force on tritium. Of the 3.4 quadrillion becquerels at the No. 1 to 4 reactors, about 2.5 quadrillion becquerels were detected in melted nuclear fuel, 834 trillion becquerels in contaminated water stored on the premises, about 50 trillion becquerels in stagnant water in reactor and turbine buildings, and about 46 trillion becquerels in water in trenches -- or underground tunnels from the basements of structures to seawalls.

[link to mainichi.jp]