Replies

Per: http://www.iaea.org/newscenter/news/tsunamiupdate01.html.

(the IAEA previously reported events using the Cambodian Earthquake Time (CET) standard, have all been converted to Universal Time Coordinated standard (UTC) and will be used for all subsequent reports).

15 March 2011, 14:10 UTC
A 30-kilometre no-fly zone has been established around the Daiichi plant. The Japan Coast Guard established evacuation warnings within 10 kilometres of Fukushima Daiichi and 3 kilometres of Fukushima Daini.

15 March 2011, 11:25 UTC
at the main gate of the Fukushima Daiichi Nuclear Power Plant:.

00:00 UTC on 15 March a dose rate of 11.9 millisieverts (mSv) / hour
06:00 UTC on 15 March a dose rate of 0.6 millisieverts (mSv) / hour.

About 150 persons from populations around the Daiichi site have received monitoring for radiation levels measures to decontaminate 23 have been taken.

Evacuation of the population from the 20 kilometre zone is continuing. Residents out to a 30 km radius are requested to seek shelter indoors. Japanese authorities have distributed iodine tablets to the evacuation centres but no decision has yet been taken on their administration.

15 March 2011, 07:35 UTC
fire at the spent fuel storage pond at the Unit 4 reactor of Fukushima Daiichi nuclear power plant was extinguished on 15 March at 02:00 UTC.

15 March 2011, 05:15 UTC
spent fuel storage pond at the Unit 4 reactor of the Fukushima Daiichi nuclear power plant is on fire and 400 millisievert per hour radioactivity has been reported between Units 3 and 4. The Japanese authorities are saying that there is a possibility that the fire was caused by a hydrogen explosion.

non-indispensible staff were evacuated from the plant, in line with the Emergency Response Plan, and that the population around the plant is already evacuated.

14 March 2011, 14:35 UTC
Fukushima Daiichi Unit 2 has experienced decreasing coolant levels in the reactor core. Officials have begun to inject sea water into the reactor to maintain cooling of the reactor core.

Sea water injections into Units 1 and 3 were interrupted yesterday due to a low level in a sea water supply reservoir, but sea water injections have now been restored at both Units.

14 March 2011, 06:00 UTC
A hydrogen explosion occurred at Unit 3 on 14 March at 11:01 am local Japan time Six people have been injured. All personnel at the site are accounted for. The reactor building has been destroyed, although integrity of the primary containment vessel remains intact and control room for Unit 3 remains operational.

14 March 2011, 00:30 UTC - Clarified
IAEA can confirm the following information concerning status of following Fukushima Daiichi nuclear power plants:

being powered by mobile power generators on site, and work continues to restore power to the plant. There is currently no power via off-site power supply or backup diesel generators being provided to the plant. Seawater and boron are being injected into the reactor vessel to cool the reactor. Due to the explosion on 12 March, the outer shell of the containment building has been lost.
being powered by mobile power generators on site, and work continues to restore power to the plant. There is currently neither off-site power supply nor backup diesel generators providing power to the plant. The reactor core is being cooled through reactor core isolation cooling, a procedure used to remove heat from the core. The current reactor water level is lower than normal but remains steady. The outer shell of the containment building is intact at Unit 2.
does not have off-site power supply nor backup diesel generators providing power to the plant. As the high pressure injection system and other attempts to cool the reactor core have failed, injection of water and boron into the reactor vessel has commenced. Water levels inside the reactor vessel increased steadily for a certain amount of time but readings indicating the water level inside the pressure vessel are no longer showing an increase. The reason behind this is unknown at this point in time. To relieve pressure, venting of the containment started on 13 March at 9:20 am local Japan time. Planning is underway to reduce the concentration of hydrogen inside the containment building. The containment building is intact at Unit 3.

13 March 2011, 12:35 UTC
venting of the containment of reactor Unit 3 of the Fukushima Daiichi nuclear power plant started at 9:20 am local Japan time of 13 March through a controlled release of vapour. The operation is intended to lower pressure inside the reactor containment.

On 12 March, the Japanese Prime Minister ordered the evacuation of residents living within 10 kilometres of the Fukushima Daini nuclear power plant and within 20 kilometres of the Fukushima Daiichi nuclear power plant.