Sunday, March 13, 2011

Concern in Japan about the possibility of a new explosion in central Fukushima

Three days of the powerful earthquake that struck Japan, the country still searching for the thousands of victims left by the disaster while anxiously waiting news on the earthquake damage in the Fukushima Daiichi nuclear power plant and its consequences for the population. The Government of Japan stated that there is a risk of another explosion, similar to yesterday, at the nuclear plant.

Previously, authorities had not ruled out a merger enabled kernel in reactors 1 and 3 nuclear power plant, a fact which could not confirm. "We believe it is likely that the merger has occurred," said Yukio Edan government spokesman in a press conference in response to a question about the risk of merging.

"We can not check what happens to the reactor core, but we are taking steps in this course," he said about the two reactors in which the pressure is higher after a malfunctioning cooling system. Now the same government spokesman Yukio Edan, does not rule out the possibility that there is a new explosion in central Fukushima 1 because of the accumulation of hydrogen in reactor number 3, as happened yesterday in the reactor 1, but ensures that it can be expected to cause no serious damage.

In case of explosion, he insists, "there will be problems reactor vine." Edan pointed out that the No. 3 reactor of the plant suffers problems in its cooling system and, although part of its core would "deform" it does not amount to a "merger." Radiation levels have already exceeded the safety limit in the vicinity of the nuclear plant operated by Tokyo Electric Power Co (TEPCO).

The company has informed the Government of an "emergency situation." However, this does not mean that there is an immediate threat to human health, says the company. TEPCO said the amount of radiation emitted by the plant has reached 882 microsievert (unit of measurement of radiation exposure) per hour, above the recommended limit of 500.

The Government said that at some point, it reached 1,204 microsievert, but 50 minutes later was reduced to 184 microsievert. The current level "is not harmful to health", insists the government, which equates to the maximum level of radioactivity emitted by the plant with three films in the stomach.

The company previously reported that initiated the release of vapor from the reactor number 3 of the plant. In it, the water level has dropped to expose three meters of fuel rods. A similar increase in radiation levels occurred after the company released radioactive steam reactor number 1 to reduce the pressure.

According to Minister of Japan spokesman Yukio Edan, it appears that the reactor has suffered a radiation leak. The company is obliged to inform the Government of any "emergency situation." Moreover, Nipponese authorities have been forced on Saturday to take exceptional measures to limit the consequences of the radioactive leak after the explosion at the site of the nuclear power plant, severely hit by the earthquake which struck northeastern Japan that has left hundreds dead and missing.

So far, 210,000 people have been evacuated from areas near the plant, another 30,000 have been evacuated near Fukushima Daini plant, which also has cooling problems. On Friday night, after the No. 1 reactor had Fukushima Daiichi cooling failure as a result of the earthquake, the authorities had ordered residents to evacuate the area within a radius of 10 km radius of the plant, which has six reactors (of which three were operational at the time of the earthquake).

The evacuation area was expanded to 20 km just four hours after the accident on Saturday. The blast occurred at 15:36 local time (7:37 am, on the peninsula) in the facility located 250 kilometers north of Tokyo. The facility, which houses the reactor core number 1, has collapsed. The International Atomic Energy Agency (IAEA) has said, citing Nipponese authorities that the blast occurred outside the primary containment vessel and the reactor core was not damaged.

The television showed a gray cloud coming out of the plant, where the roof and walls of the reactor chamber had disappeared. Four employees have been "slightly wounded" in the blast, said the public broadcaster NHK. According to an official of Japan's nuclear safety agency, at least nine people have been exposed to radiation.

However, the authorities estimate that the number of people exposed could be between 70 and 160. The Japanese authorities have launched at 20:20 local time (12:20 pm, GMT) an exceptional procedure to try to cool the reactor No. 1, inject seawater into the primary containment vessel as a refrigerant.

According to authorities, nuclear fusion is no longer an imminent threat, although it is possible. However, late in the day Fukushima Daiichi reported new problems. The emergency cooling system of one of the reactors of the plant (in particular the number 3) has stopped working on Saturday.

"All functions to maintain the coolant are damaged," said a spokesman for Tokyo Electric Power (TEPCO). According to the Japanese nuclear safety agency, the plant has had to urgently find a way to provide water for this reactor. While authorities were trying to avoid disaster at the plant throughout the day were taken to alienate the local population.

"The evacuations around the two nuclear plants affected have begun (...). complete evacuation measures [have] not been completed," the IAEA said in a statement. 'Superbomberos' trained for emergency situations, have been sent to headquarters to help neighbors to leave the area. Thousands have been evacuated.

The dose of radioactivity received by an individual in the scene correspond to which a person can absorb in one year than have assured the media, citing a level of 1,015 microsievert. Anyway, have been prepared for the distribution of iodine between those who have been evacuated and those who are still in the zones.

Iodine has the ability to block the passage of radioactive iodine. Thousands of people evacuated from areas near the plant have been examined to see if they have been exposed to radiation. In the evacuation centers, workers with masks and protective clothing use handheld scanners to screen everyone who comes.

Those who show signs of exposure or living within the area of \u200b\u200b20 km are separated from those simply seeking refuge in the earthquake. "We are emitting radiation and, since the possibility [of exhibition] is high, it is quite terrifying, said Masanori Ono, 17, waiting in a downtown of Koriyama in Fukushima Prefecture.

Authorities have struggled to send a message of calm. "radiation studied carefully and take all measures to ensure the safety of the inhabitants", assured the government spokesman Yukio Edan. Edana said that radiation had been in place " rather low "after the blast, which" has not taken place in the reactor, "he insisted." At this point it appears that the public health risk is probably quite low.

We understand that radiation has leaked from the plant is very small in quantity, "said the spokesman for his part of the World Health Organization, Gregory Hartl. Experts, officials have advised the Japanese who were within a radius greater than 20 km to stay home and shut the windows as a precaution.

They have also recommended to cut heating systems that emit air out of which come with all the houses. It is also advised that the siding use a mask or a damp towel to protect the airway and cover up to avoid exposing the skin to air. The accident has been evaluated in Level 4 of 7 in the scale of nuclear and radiological events (INES), announced the Japan Nuclear and Industrial Safety.

For example, the nuclear event of Three Mile Island in 1979 was classified as level 5, while the one at Chernobyl in 1986 was 7 on the INES scale, explained an official of the agency. If below this range are considered "incidents" from level 4 refers to "accidents" nuclear. Level 4 describes the consequences of accidents involving local, "which do not involve significant risk outside the facility," according to the IAEA.

The term "anomaly" is used for nuclear events of level 1, while Level 2 is considered "incident" and 3 "major incident." The U.S. has sent two nuclear experts to Japan, as announced by the American Nuclear Regulatory Commission (NRC). "We are ready to help in every possible way," said NRC President, Gregory Jaczko, in a statement.

"We must do everything possible, especially today, tomorrow and the day to save and provide for the victims" of the earthquake and tsunami, has insisted the Prime Minister, Naoto Kan, at a press conference. "The safety of our citizens is the priority that guides our actions." Another central Fukushima reactor No.

2 (with four reactors), a dozen miles during the day showed similar signs of cooling problems and pressure rise, forcing authorities to open the valves to output vapor. Also in this facility has been ordered to leave the area within a radius of 10 km radius.

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