Tuesday, March 22, 2011

Spike in radiation readings forces nuclear workers, to leave posts

Tuesday, March 22, 2011

Knit new evaluation offers of the explosion in unit 2 of Japan's Fukushima Daiichi nuclear plant increased Tuesday fears that it will begin to spew large amounts of radiation.

Radiation readings from difficulties in the entire work spike so high, that the remaining skeleton crew of workers at least temporarily was ordered, said their posts to give up Chief Cabinet Secretary Yukio Edano at a press conference Wednesday.

The draw-down who said plant workers "a sign for me, that they have given up, trying to prevent a catastrophe and try in the mode, then clean gone" nuclear engineer Arnie Gundersen.

The explosion in unit 2 was probably damaged the main shield to the uranium-filled core within one of the six reactors at the plant. Would such an infringement to be a nuclear power plant the first since the disaster of Chernobyl in the former Soviet Union 25 years ago.

The explosion, combined with a fire in a different unit and the deepest setbacks to stabilize even the five day battle the Daiichi plant drag back of the workers marked, which suffered heavy damage his cooling systems for earthquake and tsunami on Friday. Other explosions occurred nuclear reactors already on two of the plant.

The explosion unit 2 was to visible, but potentially dangerous not to the outside because it created escape routes for radioactive material in bottles in the thickness of steel-concrete pipe reactor. Radiation-laced steam may be experts, between buildings, the tube and the building that houses it, said triggering fears that the pressure the structure apart blow would, radiation from the core.

"they are the core of water commissioning and production of steam and the steam is, somewhere, go", Gundersen said that more than 40 years experience, supervision of the Vermont Yankee nuclear facilities, whose Reaktoren are from the same vintage and design than those in the Prefecture Fukushima Daiichi plant. "It must carry radiation."

Nuclear experts have stressed repeatedly that radiation releases on the scale of Chernobyl unlikely or even impossible, heavy engineering and additional layers of containment in the face of the Japanese plant.

Still, Tokyo Electric Power Co., operates the Daiichi plant, said radiation shortly at dangerous levels at the plant Tuesday morning and Wednesday again increased. Raised on Wednesday morning, the Japanese Government of permissible radiation exposure for the few workers still in the works of 2.5 times, so that they more, work the national television broadcaster NHK reported.

After the explosion Tuesday crew noticed a decrease in the pressure in the reactor and also within a ring-shaped structure below, called a suppression pool. The simultaneous loss of pressure in the two places are heavy damage, nuclear experts said.

The explosion happened probably after the currents of sea water, the crews have been in the reactor pumps have come to a halt. Left the fuel rods were exposed completely for some time in the air, said in a statement Tepco. Without water, the stakes grew white hot and possibly melted through the steel concrete pipe.

TEPCO said a skeleton crew of 50 to 70 staff - far less than the 1,400 or more in the works in the normal operation - had worked in shifts, sea water to the three reactors now in trouble to keep.

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