Posts Tagged ‘meltdown’

Fukushima Reactor Had Meltdown 3.5 Hours After Cooling System Collapsed; Staggering Radiation Levels Now Measured in R1 Drywell

05/25/2011 Leave a comment

By the end of March the IAEA knew that a nuclear meltdown had occurred at Fukushima, yet this information was not released to the public until nearly 7 weeks later…

“A meltdown occurred at one of the reactors at the Fukushima No. 1 Nuclear Power Plant three and a half hours after its cooling system started malfunctioning, according to the result of a simulation using ‘severe accident’ analyzing software developed by the Idaho National Laboratory.

Chris Allison, who had actually developed the analysis and simulation software, reported the result to the International Atomic Energy Agency (IAEA) in late March. It was only May 15 when Tokyo Electric Power Co. (TEPCO) admitted for the first time that a meltdown had occurred at the No. 1 reactor at the Fukushima nuclear plant.

According to Allison’s report obtained by the Mainichi, the simulation was based on basic data on light-water nuclear reactors at the Laguna Verde Nuclear Power Plant in Mexico that are about the same size as that of the No. 1, 2, and 3 reactors in Fukushima.” Read more.

More Melted Fuel At Japan’s Fukushima Nuclear Plant Uncovered During UN Probe – “In addition, some chunks of the fuel appeared to have entered the inner containment chambers, or drywell, causing some damage. That suggests that the severity of the accident was greater than officials have acknowledged. TEPCO announced similar findings last week about Unit 1. The new revelations indicate that earlier official assessments may have been too optimistic…” Read more.

Fukushima’s Apocalyptic Threat Demands Immediate Global Action – “Fukushima may be in an apocalyptic downward spiral. Forget the corporate-induced media coma that says otherwise…or nothing at all. Lethal radiation is spewing unabated. Emission levels could seriously escalate. There is no end in sight. The potential is many times worse than Chernobyl.” Read more.

F.Reactor 1 – 204,000 mSv per hour in the drywell?! – Recent readings are so high at Fukushima Reactor 1 that I am surprised this isn’t being reported by the MSM.  This is a full 204 sieverts/hr.

Location: Unit 1 nuclear power plant Fukushima
Date: Mar 15, 2011 (Tuesday) to May 25, 2011 (Wed)
Current values: D/W: two hundred and four Sv/h , S/C: 0.987 Sv / h
Status Instrument: failure

TIME: Was Fukushima a China Syndrome?

05/16/2011 Leave a comment

By EBEN HARRELL – “The China Syndrome refers to a scenario in which a molten nuclear reactor core could could fission its way through its containment vessel, melt through the basement of the power plant and down into the earth. While a molten reactor core wouldn’t burn ‘all the way through to China’ it could enter the soil and water table and cause huge contamination in the crops and drinking water around the power plant. It’s a nightmare scenario, the stuff of movies. And it might just have happened at Fukushima.” Read more.

Melting of Japan Plant’s Fuel Rods Confirmed

04/15/2011 2 comments

DAVID McNEILL – “SCIENTISTS SAY the fight to bring Japan’s crippled nuclear power plant under control could take three months or more, even if not hampered by further earthquakes. The announcement comes after another day of aftershocks, including one with an epicentre about 25km from the Fukushima plant.

The head of the Atomic Energy Society of Japan, Takashi Sawada, said yesterday that fuel rods in reactors 1 and 3 have melted and settled at the bottom of their containment vessels, confirming fears that the plant suffered a partial meltdown after last month’s huge earthquake and tsunami.”  Read more.

Nuclear Experts on Japan: ‘No End In Sight’, ‘Uncharted Territory’, ‘Effort in Danger of Failing’, Reactors ‘Too Hot to Pour Concrete’

04/10/2011 Leave a comment

By Matt Smith, CNN -“… A month into the crisis, the utility acknowledges, there is no end in sight.

The problems are so far ‘beyond the design capacity’ of the plant that the Japanese are working in uncharted territory, said Michael Friedlander, a former senior operator at U.S. nuclear power plants.

‘No nuclear power plant has ever considered the inability to get on long-term core cooling for more than a week, much less three weeks,’ Friedlander said.

Some Japanese experts now say the effort is in danger of failing unless Japan seeks more help from international experts to bring it to an end. Tetsunari Iida, an engineer-turned-industry critic, said the situation is ‘beyond the reach’ of Japan’s closely knit nuclear establishment.”  Read more.


When The Fukushima Meltdown Hits Groundwater

03/29/2011 2 comments

By Dr. Tom Burnett – “Fukushima is going to dwarf Chenobyl. The Japanese government has had a level 7 nuclear disaster going for almost a week but won’t admit it.

The disaster is occurring the opposite way than Chernobyl, which exploded and stopped the reaction. At Fukushima, the reactions are getting worse. I suspect three nuclear piles are in meltdown and we will probably get some of it.

If reactor 3 is in meltdown, the concrete under the containment looks like lava.  But Fukushima is not far off the water table. When that molten mass of self-sustaining nuclear material gets to the water table it won’t simply cool down. It will explode ­ not a nuclear explosion, but probably enough to involve the rest of the reactors and fuel rods at the facility.”  Read more.

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