The Yomiuri Shimbun 4/14/11
..."Water leaks from No. 1 reactor
Meanwhile, TEPCO has announced that water has been leaking through small openings in the bottom of the No. 1 reactor's pressure vessel.
Combined, the openings would be equivalent to a hole several centimeters in diameter, and according to TEPCO, were made when melted nuclear fuel damaged the bottom.
The melted fuel likely has accumulated in the bottom of the vessel. TEPCO has admitted the situation is a meltdown, in which melted nuclear fuel cannot maintain its shape and drops down to lower parts of a reactor core.
TEPCO had previously said fuel was just partially damaged...."
