Tokyo Electric Power Co (Tepco) said water levels have fallen at least one metre below fuel rods inside Reactor 1 and that melted fuel has dropped to the bottom of the reactor's containment vessel. Engineers are working inside the reactor building for the first time since the crisis began when a hydrogen explosion blew off its roof following the huge quake and tsunami on 11 March.
Tepco general manager Junichi Matsumoto told reporters in Tokyo that the discovery means its timetable to entomb the containment reactor vessel in water may have to be scrapped. "We can't deny the possibility that a hole in the pressure vessel caused water to leak," Mr Matsumoto said.
Observers fear that Reactor 3, which contains MOX plutonium fuel, may have also suffered a meltdown, and the situation inside Reactor 2 is still shrouded in mystery. (read more)
The following stills were taken from the above film at the :30-:31 mark, and show the hot spots / molten radioactive materials: