http://ex-skf.blogspot.com/2011/05/from-tepco-presser-may-12-am-part-1-we.htmlNOTE: Yesterday workers discovered that the readings were incorrect and there was no water in the RPV of #1 and it is in full meltdown. This is from a press conference - at the link.
Rough translation from the Q&A:
Regarding the water level in the Containment Vessel of the Reactor 1:
"The pressure gauge for the Containment Vessel is working, but we cannot properly measure the water level inside the Containment Vessel. Therefore, we do not know where the water level is."
About the water that's been poured:
"We are trying to figure that out. In the initial stage when the reactor core was still hot, the water might have been evaporated and escaped from the Containment Vessel. But now, the reactor temperature is between 100 to 120 degrees Celsius, so the water would remain water. We are assuming most of the water escaped the Containment Vessel into the surrounding reactor building. However, there is no water in the northwest corner of the basement of the reactor building, as far as we can see by the camera. We don't know where the water has gone. Possibly, it may have gone to the reactor building, the turbine building, or the waste disposal facility. But we haven't identify it yet."
About the leak location - whether the Containment Vessel itself has the leak or the building foundation has a leak:
"The water may be escaping from the bottom of the Containment Vessel or the RPV, but we haven't identified the location."