The latest information in Fukushima indicated that four of the six reactors are played, some of them very serious. Reactors 1, 2 and 3 are part of the core exposed. This means that nuclear fuel is exposed and therefore lacked the proper cooling to prevent the merger process forward. If this happens, the reaction can be completely uncontrollable and could melt the reactor core.
Explosions, partial melting of the core, fires, removal of radioactive particles into the atmosphere ... The six reactors that form the central Japan, with serious problems from the earthquake on Friday, following its path to nuclear catastrophe. And what many tried to control it gets out of hand.
The situation of the reactors is "serious." The No. 1 reactor, the first one exploded, is no refrigeration, there has been a partial core melt and vessel damage. 2, one of the most affected, have practically no cooling, while the containment vessel was damaged by the explosion of hydrogen occurred at dawn on Tuesday.
Reactors 5 and 6 also face problems of cooling and the temperature of its pools has increased considerably, although it is at normal levels. But undoubtedly, the most dangerous reactor is 3. It is the only plant which uses plutonium, much more harmful than uranium. Damaged by an explosion on Monday, has serious cooling problems, has produced a partial core melt and containment system is damaged, so it has removed radioactive particles into the atmosphere, next to the exhaust of the reactor 2 has high radiation levels up to 100 millisievert per hour, so that the work of cooling has been stopped until these levels fall.
In this reactor have been measured very high dose rates (400 millisievert) along one wall of the reactor building. These values \u200b\u200bcould be related to the situation that is the core of the reactor, which is discovered, with its containment or the state of the fuel pool after the explosion suffered.
For its part, the reactor 4, which is "critical", the company said TEPCO. Since yesterday there have been two fires and pool that cools the fuel rods is completely empty. Such is the situation that the government has ordered the company to inject water into the pool "as soon as possible to avoid a major nuclear disaster." Although the flames in the reactor 4 were quickly controlled, the blast caused two holes of eight square meters in the outer wall of the reactor building, leaving the air in contact with the fuel pool.
In addition, the ceiling is breached. In short, it is estimated that 70% of nuclear fuel rods have been damaged, of which 33% belong to the reactor 2. In addition, it is believed that the reactor cores are partially fused in the absence of refrigeration. Faced with increasing radiation and although the authorities have allowed up to 250 millisievert levels for workers, the plant forced the evacuation of the last employees who remained on campus, returning hours later.
A total of 50 workers who come to be rotated periodically to avoid being overexposed to radiation. During that time, operations to cool the reactors was halted. A helicopter has been flying the cargo area of \u200b\u200bwater to cool the damaged reactor, but high levels of radioactivity have prevented it from meeting the target.
The second attempt will be made with water cannons pointed directly to the reactors. The measures taken by the Government so far have included the evacuation of citizens in a radius of 20 kilometers, the establishment of an air exclusion zone of 30 kilometers and the request to the residents of Fukushima to stay home and not go the street.
But the problems not only stem from the plant. The energy shortage after the earthquake has forced cuts in light at certain times of day, times when the computer system used to measure the spread of radioactivity around Fukushima stops working. The Japanese Nuclear Safety Agency does not have the system working again at one hundred percent, since many of the measurement points do not work because of power outages.
In this context, the head of the Japanese Cabinet, Yukio Edan, has conceded that it would be necessary to aid in third countries. So, has considered the possibility of seeking the intervention of U.S. military forces to meet the emergency, unleashed by the earthquake of nine degrees on the Richter scale on Friday hit the northeastern coast.
Despite this warning, Edan has said that the levels of radiation released into the air, not pose an immediate health risk. It has also asked the population to remain calm and restrain the compulsive buying of fuel, as this could cause a general shortage would worsen the already grave situation facing the country.
For its part, the Japanese emperor, Akihito, has addressed in a televised address to the country. Five days after the severe earthquake and tsunami, has called for calm. Through the public broadcaster NHK, Akihito, 77, has told the Japanese people who pray for "the welfare of as many survivors as possible after the disaster." In turn, explained that problems in Japan's nuclear reactors are unpredictable. 
Explosions, partial melting of the core, fires, removal of radioactive particles into the atmosphere ... The six reactors that form the central Japan, with serious problems from the earthquake on Friday, following its path to nuclear catastrophe. And what many tried to control it gets out of hand.
The situation of the reactors is "serious." The No. 1 reactor, the first one exploded, is no refrigeration, there has been a partial core melt and vessel damage. 2, one of the most affected, have practically no cooling, while the containment vessel was damaged by the explosion of hydrogen occurred at dawn on Tuesday.
Reactors 5 and 6 also face problems of cooling and the temperature of its pools has increased considerably, although it is at normal levels. But undoubtedly, the most dangerous reactor is 3. It is the only plant which uses plutonium, much more harmful than uranium. Damaged by an explosion on Monday, has serious cooling problems, has produced a partial core melt and containment system is damaged, so it has removed radioactive particles into the atmosphere, next to the exhaust of the reactor 2 has high radiation levels up to 100 millisievert per hour, so that the work of cooling has been stopped until these levels fall.
In this reactor have been measured very high dose rates (400 millisievert) along one wall of the reactor building. These values \u200b\u200bcould be related to the situation that is the core of the reactor, which is discovered, with its containment or the state of the fuel pool after the explosion suffered.
For its part, the reactor 4, which is "critical", the company said TEPCO. Since yesterday there have been two fires and pool that cools the fuel rods is completely empty. Such is the situation that the government has ordered the company to inject water into the pool "as soon as possible to avoid a major nuclear disaster." Although the flames in the reactor 4 were quickly controlled, the blast caused two holes of eight square meters in the outer wall of the reactor building, leaving the air in contact with the fuel pool.
In addition, the ceiling is breached. In short, it is estimated that 70% of nuclear fuel rods have been damaged, of which 33% belong to the reactor 2. In addition, it is believed that the reactor cores are partially fused in the absence of refrigeration. Faced with increasing radiation and although the authorities have allowed up to 250 millisievert levels for workers, the plant forced the evacuation of the last employees who remained on campus, returning hours later.
A total of 50 workers who come to be rotated periodically to avoid being overexposed to radiation. During that time, operations to cool the reactors was halted. A helicopter has been flying the cargo area of \u200b\u200bwater to cool the damaged reactor, but high levels of radioactivity have prevented it from meeting the target.
The second attempt will be made with water cannons pointed directly to the reactors. The measures taken by the Government so far have included the evacuation of citizens in a radius of 20 kilometers, the establishment of an air exclusion zone of 30 kilometers and the request to the residents of Fukushima to stay home and not go the street.
But the problems not only stem from the plant. The energy shortage after the earthquake has forced cuts in light at certain times of day, times when the computer system used to measure the spread of radioactivity around Fukushima stops working. The Japanese Nuclear Safety Agency does not have the system working again at one hundred percent, since many of the measurement points do not work because of power outages.
In this context, the head of the Japanese Cabinet, Yukio Edan, has conceded that it would be necessary to aid in third countries. So, has considered the possibility of seeking the intervention of U.S. military forces to meet the emergency, unleashed by the earthquake of nine degrees on the Richter scale on Friday hit the northeastern coast.
Despite this warning, Edan has said that the levels of radiation released into the air, not pose an immediate health risk. It has also asked the population to remain calm and restrain the compulsive buying of fuel, as this could cause a general shortage would worsen the already grave situation facing the country.
For its part, the Japanese emperor, Akihito, has addressed in a televised address to the country. Five days after the severe earthquake and tsunami, has called for calm. Through the public broadcaster NHK, Akihito, 77, has told the Japanese people who pray for "the welfare of as many survivors as possible after the disaster." In turn, explained that problems in Japan's nuclear reactors are unpredictable.
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