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Incident at nuclear power plants Fukushima-1
Around 9:36 Moscow time on Saturday March 12 at the first power plant Fukushima-1, an explosion occurred parovodorodnoy mix, partially destroyed the structure of the block. Official data on the extent of possible radioactive emissions are currently unavailable.
The second explosion occurred at 05:01 Moscow time on Monday 14 March of the third power plant.
A third explosion occurred at 00:10 Moscow time on Tuesday, March 15, second power plant. The result could be damaged containment vessel (outer solid "cocoon" around the reactor) and a pool-barbater containing cold water in the space below reactor.
At 3:40 Moscow time on Tuesday 15 March at the fourth power unit started the fire, which resulted in a few hours for the next explosion. Thus, all four major power plant site have been disabled.
Tuesday morning the power company spread the message about the level of background radiation at the station 8217 mSv / h (821 700 mR / h), but no details about the parameters of the emission occurred during the explosions. Increasing the radiation background notes on March 15 in the regions south of the station, including in Tokyo.
According to the Japanese government, explosions have occurred have not resulted in the destruction of the reactor vessel. However, the second power damage could get a containment vessel and the pool-barbater.
Prevailing winds in the region continue to blow in the south and east toward the ocean, which virtually eliminates the medium term, potential emissions from entering the territory of Russia. MOE Russian organized monitoring of radiation background in the cities of the Far East and Primorye, air samples are taken every two hours.
Currently, the radiation background in the Far East and Primorye (Russia) is within normal values.
what does Counter Measure Headquarters actually mean??
It’s just a name of the emergency task force set up by TEPCO and Government created for this special event and will disband when the catastrophe is over.
Reactor #1 and #3 stabilized, #2 it’s too early to say.
#4 is again too early to say but supposedly from hydrogen reaction.
#5 and #6 were already stopped way before the earthquake but they have huge clusters of spent rods that take years to cool and are still radioactive but in these rooms water is supposed to be circulating at all times and the pumps are damaged. It’s too early to say what’s happening with these reactors.
There’s also a report of a 30km no fly zone - can anyone confirm this with links?
The Japanese Transport Ministry declared a no-fly zone within the range of 30 km from the blast-hit Fukushima 1 Nuclear Power Plant, the Kyodo news agency said on Tuesday.
The ban does not include planes and helicopters involved in rescue efforts and delivering aid to quake-hit areas.
Fears of a large-scale nuclear disaster remain high in Japan as the country continues relief operations following a devastating earthquake and tsunami that have killed nearly 6,000 people and left thousands missing.
Cooling systems of the Fukushima plant failed following the earthquake, resulting in blasts in units one and three on Monday. Early on Tuesday, the 4th reactor was hit by a blast, which resulted in leak of radioactive isotopes.
Reuters said, citing the International Atomic Energy Agency, that a spent fuel storage pond was on fire and radiation leaked "directly" into the atmosphere. Dose rates of up to 400 millisievert per hour have been recorded in the area.
NTERFAX.RU - A fire in the storage of nuclear waste at nuclear power plant emergency, "Fukushima-1 in Japan extinguished,
URGENT: Fukushima's spent nuke fuel pool may be boiling, reducing water level
TOKYO, March 15, Kyodo
Water in a pool storing spent nuclear fuel at the No. 4 reactor that caught fire Tuesday morning at the quake-hit Fukushima No. 1 nuclear power plant may be boiling, causing the water level to drop, an official of Tokyo Electric Power Co. said.
The reactor was not in service when a magnitude 9.0 earthquake jolted Fukushima Prefecture and other areas in northeastern Japan on Friday, the official in charge of the facility said.
Status of quake-stricken reactors at Fukushima nuclear power plant
TOKYO, March 15, Kyodo
The following is the known status as of Tuesday evening for each of the six reactors at the Fukushima No. 1 nuclear power plant in Fukushima Prefecture, crippled by Friday's magnitude 9.0 earthquake and ensuing tsunami.
-- Reactor No. 1 - Cooling failure, partial melting of core, hydrogen explosion, seawater pumped in.
-- Reactor No. 2 - Cooling failure, seawater pumped in, fuel rods fully exposed temporarily, partial melting of core, damage to containment system.
-- Reactor No. 3 - Cooling failure, partial melting of core, seawater pumped in, hydrogen explosion.
-- Reactor No. 4 - Under maintenance when quake struck, fire caused by hydrogen explosion at pool holding spent fuel rods, pool water levels feared receding.
-- Reactor No. 5 - Under maintenance when quake struck.
-- Reactor No. 6 - Under maintenance when quake struck.