Sounds like some good-ish news:
Fuel rods in the reactor vessel of Unit 2 at the Fukushima Daiichi Power Plant were temporarily uncovered from cooling water today, but seawater injection has raised the water level to the halfway point, Tokyo Electric Power Co. (TEPCO) said. Seawater is now being used to cool all three Daiichi reactors that were shut down after the March 11 earthquake. Unit 2 had lost its emergency cooling capacity. Workers were preparing to remove hydrogen from the reactor building, and TEPCO has opened the steam relief valve of the reactor.
The primary containment vessels and reactor cores of reactors 1 and 3 at the Fukushima Daiichi facility are intact, following earlier hydrogen explosions in the secondary containment buildings of both reactors.
At Unit 1, seawater injection continues to cool reactor. Safety regulators consider the reactor’s pressure an indication of a stable condition. The hydrogen explosion on March 11, which occurred between the primary containment vessel and the containment building, did not damage the primary containment vessel or the reactor core. To control the pressure of the reactor core, TEPCO has been injecting seawater and boric acid into the primary containment vessel of Unit 1 since March 12.
A hydrogen explosion Monday at Unit 3, similar to the unit 1 explosion, did not damage the primary containment, Japan’s Nuclear and Industrial Safety Agency (NISA) said. The control room remains operational, and a government official said that pressure in the reactor vessel is stable. After the explosion, the few hundred people remaining in the 12.5-mile evacuation zone were asked to stay indoors.
At the Fukushima Daini site, cooling capability has been reestablished for Unit 4 at the reactor. Units 2 and 4 are in cold shutdown.
http://www.nei.org/newsandevents/inf...n-that-region/