Al-Hayat

The authorities of Japan raised the possibility of a probable violation Friday in the main forum for the No. 3 reactor at the Fukushima Daiichi nuclear power plant hit a potentially ominous development in the race to avoid releasing large-scale radiation .

Contaminated water leaked into the containment vessel of the reactor protection of the heart, “said Hidehiko Nishiyama Security Council of Japan Nuclear and Industrial Safety.

Three men working inside the reactor No. 3 went into the water this week, which was 10,000 times the amount of radiation, typical of that country, Nishiyama said. That water is probably the meaning of “a sort of escape from the reactor, indicating a possible breach of the containment vessel houses the nucleus.

Vessel containment system is designed to prevent radioactive material from escaping into the atmosphere, even if other parts of the reactor is damaged. A break in the containment vessel system could pose problems for workers who try to prevent that, depending on severity.

The three workers who were exposed to radiation for the intensification of contaminated water has the highest radiation levels recorded to date, said Tokyo Electric Power Co., which owns the plant.

The incident raised questions about the installation of radiation monitoring measures 536 people – including government authorities and fire services – continued there on Friday, according to officials from Tokyo Electric.

The workers have taken various measures to prevent further radioactive substances into the air and after it.

About 17 people were exposed to 100 or more millisieverts radiation because the crisis plan began two weeks ago, following a 9.0 magnitude earthquake and tsunami struck.

A person in an industrialized country is naturally exposed to 3 mSv per year of radiation.

But Ministry of Health of Japan has recently raised the maximum exposure for a person working to solve the crisis at the nuclear power of 100 to 250 mSv mSv per year.

Employees of the cables was No. 3 reactor turbine building’s basement when they went into the water. E ‘penetrated into the boots of two high-utility.

Workers remained within 15 centimeters (5 inches) of water for about 40-50 minutes.

Two of them were admitted to the Japanese National Institute of Radiological Sciences: A 30-year, who were exposed to 180.7 mSv and the other in his 20s, who were tested at 179.37 mSv.

Nishiyama said the third man – who was exposed to 173 mSv, but at first did not go to the hospital because his boots were high enough to prevent water from touching your skin – has also increased in the hospital looking for even “abundance of caution .

The water in this area is typically a boil and has a low radiation Nishiyama said.

One measure was the big top agency official asks Nishiyama Tokyo Electric, to improve its radiation.

The No. 1 reactor remains a major concern, with Japan Atomic Industrial Forum noted Friday that the containment has been the experience “increased” pressure.

Previously accumulations of hydrogen gas raises the pressure that led to explosions in three nuclear reactors, including the No. 1 unit.

Nishiyama admitted that “the control of temperature and pressure has been difficult,” and that the shelter. Still, said on Friday that the situation then was “relatively stable”, as the pressure is decreased labeling.

As for the unity of the spent nuclear fuel pool, Nishiyama said the hope is to start pumping fresh water – rather than seawater, as has been done.

These basins, which are different, but related to a particular reactor, the fuel rods, which can emit radiation, particularly if the heat is more likely to occur without functional cooling system in place, and when the rods are not entirely covered by water.

Last freshwater instead of seawater, is also a priority for the reactor core No. 2 (as well as for spent fuel pool), Nishiyama said. The aim is to prevent further damage and corrosion inside, which can be aggravated by the accumulation of salt.

Beyond the sea / question salt, water, and some units 1 and No. 2 was “a high level of radiation” Nishiyama said on Friday – although not as large as the unit n. 3.

Thursday incident is yet the main object of the second reactor, and Nishiyama said Friday that “the radiation is high” in some places near the unit.

He said authorities were considering “other ways” to achieve its objectives to restart their cooling systems around No. 3, keeping the pool of spent nuclear fuel in failure and for other purposes. Later in the day, Nishiyama said authorities had not yet determined how to bypass the obstacle.

To do this, the Tokyo fire department and Kawasaki plans to resume spraying of reactor No. 3 and its fuel tank Friday afternoon, according to Nishiyama.

Efforts are also in No. 4, 5 and 6 reactors – each has its own concerns, albeit less pronounced because the units were scheduled outages during the earthquake. None of these three units have nuclear fuel in their reactors, although efforts are underway to control the temperature inside the spent fuel pool.

Friday morning, the concrete pump trucks used to re-injection of seawater into the group No 4 of the fuel pool.