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In this undated but recent photo released by Tokyo Electric Power Co., the Fukushima Daiichi Nuclear Power Plant reactors stand in line intact in Okumamachi in Fukushima Prefecture (state), northeastern Japan. Reactors encased in square boxes, from left,

Doomsday Scenario at Fukushima

Marvin Resnikoff- HuffPost
Senior Associate, Radioactive Waste Management Associates
Posted: March 15, 2011 11:03 AM

The slow motion events occurring at Japan’s (or GE’s) Fukushima reactor cannot be sugar-coated. It is a doomsday scenario unfolding.

Nuclear reactors are not the same as coal/oil/gas electricity plants. Unlike conventional plants, they cannot be turned off. So while brave workers were tending to Units 1, 2 and 3 reactors, attempting against all odds to keep the reactor from overheating, the fuel pool at Unit 4 was left untended; without makeup water to cool them, the fuel rods overheated. Above 1800 oF, an exothermic reaction, a fire, took place with the zirconium cladding around the uranium pellets. Zirconium burned, forming zirconium oxide and hydrogen gas, which then exploded and released radioactive cesium, a semi-volatile metal, to the atmosphere.

Near the plant, the radiation levels dangerously escalated to 400 milliseiverts/hour (or 40 rems/hour in U.S. parlance). Considering background is on the order of 1 milliseivert per YEAR, this means a yearly background dose every 9 seconds. Put plainly, workers at the Fukushima reactors are putting their lives in immediate jeopardy.

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Fukushima Explosion: Japan Nuclear Plant Rocked By Hydrogen Explosion (VIDEO)

AP/The Huffington Post First Posted: 03/14/11 01:33 AM Updated: 03/14/11 08:01 AM

SOMA, Japan – The second hydrogen explosion in three days rocked Japan’s stricken Fukushima Dai-ichi nuclear plant Monday, sending a massive column of smoke into the air and wounding 6 workers. The plant’s operator said radiation levels at the reactor were still within legal limits.

(SCROLL DOWN FOR LIVE UPDATES)

The explosion at the plant’s Unit 3, which authorities have been frantically trying to cool following a system failure in the wake of a massive earthquake and tsunami, triggered an order for hundreds of people to stay indoors, said Chief Cabinet Secretary Yukio Edano.

Tokyo Electric Power Co. said radiation levels at Unit 3 were 10.65 microsieverts, significantly under the 500 microsieverts at which a nuclear operator must file a report to the government.

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The No. 3 reactor at the Fukushima No. 1 nuclear power plant is seen in this still image taken from NHK news program on March 13, 2011. Tokyo Electric Power Co., the utility supplier, notified the government early Sunday morning that the No. 3 reactor at the No. 1 Fukushima plant had lost the ability to cool the reactor core. The reactor is now in the process of releasing radioactive steam, according to top government spokesman Yukio Edano. (Xinhua/NHK)

Radiation level passes legal limit in quake-hit Fukushima nuke plant: Kyodo

English.news.cn

2011-03-14 06:38:12

TOKYO, March 14 (Xinhua) — The radiation level at a quake-hit nuclear power plant in Japan’s Fukushima Prefecture has again exceeded the legal limit, according to a report by Kyodo news agency Monday morning.

The operator and owner of the Fukushima plants, Tokyo Electric Power Co., said the Fukushima No. 1 nuclear plant has been shut down since the devastating magnitude-9 quake struck northeastern and eastern Japan on Friday, but some of its reactors have lost their cooling functions.

The No. 3 reactor at the plant lost its ability to cool the reactor core early Sunday, becoming the sixth reactor that lost the function. And a hydrogen explosion is possible at the No. 3 reactor, Japanese Chief Cabinet Secretary Yukio Edano said Sunday.

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