About 130 firefighters trucks have traveled on Friday from Tokyo to Fukushima nuclear plant (northeastern Japan), where the radiation level has dropped after a cooling operation of the reactors. Several trucks have picked up the release of water into the building that houses the reactor number 3. After the water poured on Thursday about the reactor 3, Friday the experts will attempt to cool again, while going to try to revive the power to external cables to help cool it.
Operators of the Fukushima nuclear plant are working overtime to restore cooling systems to tackle the overheating of the spent fuel pools of the reactors, said spokesmen for the company Tokyo Electric (TEPCO). Is scheduled for Friday afternoon to maintain the operation to drop water on the plant, where trucks and helicopters on Thursday tried to cool the reactor by this means number 3, on which was poured 64 tons of water.
Radiation levels have declined slightly after the "heroes" who try to avoid disaster in Fukushima Daiichi poured water on land and air over the reactor number 3, the only plant that contains plutonium. In addition, technicians have managed to connect a cable to one of the reactors, hoping to restore power to revive the flow of cooling systems.
The crisis, however, can last "weeks", has warned the U.S. nuclear official, Gregory Jaczko. In a news conference that offered in the early hours of Friday (Thursday night on the peninsula), Tokyo Electric Power Company (TEPCO) has said that radiation levels in one of the entrances to the plant had descencido slightly by channel NHK Japan.
The decrease was detected after an operation of more than one hour by riot police and Self-Defense Forces (the name of Japan's military) to supply water from tankers to the reactor building 3, one of the most damaged successive explosions which have taken center and one of the greatest concern, since it is the only one that works with a nuclear fuel called MOX uranium also contains plutonium (more dangerous).
Five trucks have shed water to try to cool the spent fuel pool of this reactor. This pool, as well as the reactor 4, which focused on the task of cooling on Thursday, concerned as much or more than the warming in the reactor cores, because the nuclear fuel in it is also warming and emitting radioactivity.
Furthermore, attempts to determine the status of the storage pool unit 4, since it is unknown whether there is still water to cover the fuel found in the container. In remarks carried by public broadcaster NHK, an official of TEPCO, the operator of the plant, said the amount of fuel in the reactor pool 4 is "very high" and there is "considerable uncertainty" about whether there is water or not.
On Thursday Nippon technicians carried out an operation to try unconventional cool the reactors. For the first time the Japanese army helicopters dropped water on the sea borated reactors 3 and 4 of the plant. Up to four times the discharge occurred, which on Wednesday had to be aborted due to high radiation levels in the plant.
3 In the reactor core is damaged and the nuclear fuel found (as happens in the reactor 1, the other was operating when the earthquake struck) but also 2 and 3 units were damaged in the containment structure ( the steel and concrete barrier that should prevent radioactive leakage in case of a merger of the nucleus).
Indeed, it appears that attempts to restore power in the reactor 2 are also advancing. Yes, slower than expected. "The preparatory work has not gone so far as fast as we'd hoped," admitted a spokesman for the company that operates the plant. High levels of radioactivity in the plant frequently forced to control workers.
Engineers working on getting central tonight to install a power cable to the reactor 2, but have not yet returned the flow of energy to the plant. "If the restoration work is completed, we will be able to activate several electric pumps and cast water reactors and spent nuclear fuel pools," a TEPCO spokesman told AFP.
Since last Friday, Japan was shaken by an earthquake and tsunami, we lost all power inside and outside in the reactors of the plant. The cooling systems fail, the reactor began to overheat and Fukushima's nightmare began. "They plan to reconnect the power [electric] to unit 2 once it has completed the irrigation water on the reactor 3," the IAEA said Thursday in a statement.
This implies that reconnection tasks will be interrupted on Friday while throwing water on the reactor 3. Throughout the day, the workers tried to connect a cable of 1 km in length to the main network, to re-start the water pumps that cool the reactor 2. Moreover, the emergency diesel generator in the reactor 6 is again operational and supplying electricity to the units 5 and 6 (which is about 200 meters from the other four reactors at the plant), according to Japan's nuclear body (NISA .) But even if Tepco get restore power to the reactor 2, it is unclear whether the cooling system work, it may have been damaged by natural disasters and explosions.
The U.S. nuclear official, Gregory Jaczko, has warned, in fact, that the resolution of the crisis will take "some time, possibly weeks," he was quoted by the New York Times. On Thursday, the IAEA found that the situation in Fukushima remains "very serious", but seemed no worse since the previous day.
However, the radioactivity had increased in the locations of the evacuation zone around the plant, compared to Wednesday. The cores of the three reactors were in operation on Friday (1, 2 and 3) are damaged, but according to the IAEA are now "relatively stable." In units 1 and 3 (the latter, the only one using a mixed oxide fuel of uranium and plutonium, MOX) fuel rods (measuring nearly four feet long) are covered by water only halfway.
Meanwhile, in the reactor 2 the liquid level is slightly higher but is discovered. Nuclear fuel must be covered with coolant to keep warm. If not, the bars that contain nuclear material (uranium or, in the case of 3, also plutonium) begin to 'melt' until there is a meltdown, with major releases of radioactivity.
It is feared that in some reactors and may have initiated partial melting of the core. 
Operators of the Fukushima nuclear plant are working overtime to restore cooling systems to tackle the overheating of the spent fuel pools of the reactors, said spokesmen for the company Tokyo Electric (TEPCO). Is scheduled for Friday afternoon to maintain the operation to drop water on the plant, where trucks and helicopters on Thursday tried to cool the reactor by this means number 3, on which was poured 64 tons of water.
Radiation levels have declined slightly after the "heroes" who try to avoid disaster in Fukushima Daiichi poured water on land and air over the reactor number 3, the only plant that contains plutonium. In addition, technicians have managed to connect a cable to one of the reactors, hoping to restore power to revive the flow of cooling systems.
The crisis, however, can last "weeks", has warned the U.S. nuclear official, Gregory Jaczko. In a news conference that offered in the early hours of Friday (Thursday night on the peninsula), Tokyo Electric Power Company (TEPCO) has said that radiation levels in one of the entrances to the plant had descencido slightly by channel NHK Japan.
The decrease was detected after an operation of more than one hour by riot police and Self-Defense Forces (the name of Japan's military) to supply water from tankers to the reactor building 3, one of the most damaged successive explosions which have taken center and one of the greatest concern, since it is the only one that works with a nuclear fuel called MOX uranium also contains plutonium (more dangerous).
Five trucks have shed water to try to cool the spent fuel pool of this reactor. This pool, as well as the reactor 4, which focused on the task of cooling on Thursday, concerned as much or more than the warming in the reactor cores, because the nuclear fuel in it is also warming and emitting radioactivity.
Furthermore, attempts to determine the status of the storage pool unit 4, since it is unknown whether there is still water to cover the fuel found in the container. In remarks carried by public broadcaster NHK, an official of TEPCO, the operator of the plant, said the amount of fuel in the reactor pool 4 is "very high" and there is "considerable uncertainty" about whether there is water or not.
On Thursday Nippon technicians carried out an operation to try unconventional cool the reactors. For the first time the Japanese army helicopters dropped water on the sea borated reactors 3 and 4 of the plant. Up to four times the discharge occurred, which on Wednesday had to be aborted due to high radiation levels in the plant.
3 In the reactor core is damaged and the nuclear fuel found (as happens in the reactor 1, the other was operating when the earthquake struck) but also 2 and 3 units were damaged in the containment structure ( the steel and concrete barrier that should prevent radioactive leakage in case of a merger of the nucleus).
Indeed, it appears that attempts to restore power in the reactor 2 are also advancing. Yes, slower than expected. "The preparatory work has not gone so far as fast as we'd hoped," admitted a spokesman for the company that operates the plant. High levels of radioactivity in the plant frequently forced to control workers.
Engineers working on getting central tonight to install a power cable to the reactor 2, but have not yet returned the flow of energy to the plant. "If the restoration work is completed, we will be able to activate several electric pumps and cast water reactors and spent nuclear fuel pools," a TEPCO spokesman told AFP.
Since last Friday, Japan was shaken by an earthquake and tsunami, we lost all power inside and outside in the reactors of the plant. The cooling systems fail, the reactor began to overheat and Fukushima's nightmare began. "They plan to reconnect the power [electric] to unit 2 once it has completed the irrigation water on the reactor 3," the IAEA said Thursday in a statement.
This implies that reconnection tasks will be interrupted on Friday while throwing water on the reactor 3. Throughout the day, the workers tried to connect a cable of 1 km in length to the main network, to re-start the water pumps that cool the reactor 2. Moreover, the emergency diesel generator in the reactor 6 is again operational and supplying electricity to the units 5 and 6 (which is about 200 meters from the other four reactors at the plant), according to Japan's nuclear body (NISA .) But even if Tepco get restore power to the reactor 2, it is unclear whether the cooling system work, it may have been damaged by natural disasters and explosions.
The U.S. nuclear official, Gregory Jaczko, has warned, in fact, that the resolution of the crisis will take "some time, possibly weeks," he was quoted by the New York Times. On Thursday, the IAEA found that the situation in Fukushima remains "very serious", but seemed no worse since the previous day.
However, the radioactivity had increased in the locations of the evacuation zone around the plant, compared to Wednesday. The cores of the three reactors were in operation on Friday (1, 2 and 3) are damaged, but according to the IAEA are now "relatively stable." In units 1 and 3 (the latter, the only one using a mixed oxide fuel of uranium and plutonium, MOX) fuel rods (measuring nearly four feet long) are covered by water only halfway.
Meanwhile, in the reactor 2 the liquid level is slightly higher but is discovered. Nuclear fuel must be covered with coolant to keep warm. If not, the bars that contain nuclear material (uranium or, in the case of 3, also plutonium) begin to 'melt' until there is a meltdown, with major releases of radioactivity.
It is feared that in some reactors and may have initiated partial melting of the core.
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