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TEPCO Admits Complete Fuel Meltdown Occurred 16hrs after Quake.


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#1 Floppin

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Posted 17 May 2011 - 09:07 PM

Based on provisional analysis of data on the reactor, the utility concluded that the water level in the pressure vessel began to drop rapidly immediately after the tsunami, and the top of the fuel began to be exposed above the water around 6 p.m. Around 7:30 p.m., the fuel was fully exposed above the water surface and overheated for more than 10 hours. At about 9 p.m., the temperature in the reactor core rose to 2,800 degrees Celsius, the melting point for fuel. At approximately 7:50 p.m., the upper part of the fuel started melting, and at around 6:50 a.m. on March 12, a meltdown occurred.

On the reason why it took over two months after the earthquake to reveal the information, TEPCO said it had only been able to start obtaining detailed data on the temperature and pressure in the reactor for analysis in early May.

Junichiro Matsumoto, a senior TEPCO official, said, "Because there is similar damage to the fuel rods at the No. 2 and 3 reactors, the bottoms of their pressure vessels could also have been damaged." He said the utility would carry out similar analysis on the two reactors.

Hiroaki Koide, professor of nuclear safety engineering at Kyoto University, was critical of TEPCO.

"They could have assumed that when the loss of power made it impossible to cool down the reactor, it would soon lead to a meltdown of the core. TEPCO's persistent explanation that the damage to the fuel had been limited turned out to be wrong," he said.


http://mdn.mainichi....0na028000c.html

#2 cptx

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Posted 17 May 2011 - 09:11 PM

oops

#3 chris999

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Posted 17 May 2011 - 11:39 PM

I knew it was much worse than they were telling us. In fact, the plant went into full meltdown the very night of the earthquake. i remember just last week stating that this disaster is already worse environmentally than Chernobyl was, even though, thankfully, there was less loss of life.

#4 ChucktownK

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Posted 18 May 2011 - 12:20 AM

My wife's friends there have accepted their fate.

#5 venom

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Posted 18 May 2011 - 02:01 AM

typical

#6 Darth Biscuit

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Posted 18 May 2011 - 05:41 AM

My wife's friends there have accepted their fate.


In what way? Did they live close to it?

#7 Happy Panther

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Posted 18 May 2011 - 07:28 AM

i remember just last week stating that this disaster is already worse environmentally than Chernobyl was,


This is so far from true

#8 Floppin

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Posted 18 May 2011 - 08:01 AM

Actually in many ways it's turning out to be worse. Remember some atmospheric research facilities believed that Fukushima could have released 30-40% of the total amount of radiation that Chernobyl released in just the first 3-4 days after the disaster. That was before TEPCO admitted this little tidbit. In the end we will find out that this is a worse disaster. Give it time.

#9 cookinwithgas

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Posted 18 May 2011 - 08:15 AM

If a reactor in Japan melts to the core of the earth is it called "The Africa Syndrome"?

#10 Happy Panther

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Posted 18 May 2011 - 08:17 AM

Actually in many ways it's turning out to be worse. Remember some atmospheric research facilities believed that Fukushima could have released 30-40% of the total amount of radiation that Chernobyl released in just the first 3-4 days after the disaster. That was before TEPCO admitted this little tidbit. In the end we will find out that this is a worse disaster. Give it time.


Want to provide a link?

The most alarmist conspiracy sites don't have radiation levels anywhere near Chernobyl. Even when standing inside the facility on the day of the alleged meltdown. Today the grass within a few miles of Chernobyl have radiation levels 20x normal.

It is literally impossible to have a similar type or radiation release as happened in Chernobyl for many reasons.

#11 Floppin

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Posted 18 May 2011 - 11:49 AM

Want to provide a link?

The most alarmist conspiracy sites don't have radiation levels anywhere near Chernobyl. Even when standing inside the facility on the day of the alleged meltdown. Today the grass within a few miles of Chernobyl have radiation levels 20x normal.

It is literally impossible to have a similar type or radiation release as happened in Chernobyl for many reasons.


I've provided links to this before, in the other Fukushima thread which you obviously conveniently ignored. Here you go for a second time.

The estimated source terms for iodine-131 are very constant, namely 1.3 10 17 Bq / day for the first two days (U.S. measurements) and 1.2 10 17 Bq / day for the third day (Japan). For cesium-137 measurements to make the U.S. a source term of 5 10 15 Bq close, while Japan was a lot more air in the cesium in. On that day 10 would be the source term with about 4 16 Bq can be estimated.

In the nuclear catastrophe at Chernobyl was the entire source term of iodine-131 1.76 10 18 Bq of cesium-137 8.5 10 16 Bq. The Fukuschima estimated for source terms that are at 20% of Chernobyl-term for iodine, and 20-60% of the Chernobyl-term for cesium.


http://www.zamg.ac.a...1-03-23GMT10:57

This is from March 23rd. Todays date is May 18th. You do the math.

#12 Floppin

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Posted 18 May 2011 - 12:05 PM

Of course all this news coincides with Japan widening their evacuation zone.

JAPAN has started the first evacuations of homes outside a government exclusion zone after the March 11 earthquake and tsunami crippled one of the country's nuclear power plants.

About 4000 residents of Iidate-mura village and 1100 people in Kawamata-cho town, in the quake-hit northeast, began the phased relocations to public housing, hotels and other facilities in nearby cities.

Their communities are outside the 20km radius from the Fukushima Daiichi power plant, officially designated as an area of forced evacuation due to health risks from the radiation seeping from the ageing and damaged plant.


http://www.dailytele...9-1226056379940

By all means, keep living in a dream world.

#13 Happy Panther

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Posted 18 May 2011 - 12:05 PM

Ha I ignored a link completely written in German :lol:

#14 Floppin

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Posted 18 May 2011 - 12:06 PM

Translate it with google. I provided a translated quote for you.

#15 Kettle

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Posted 18 May 2011 - 12:06 PM

why aren't any of the measurements given in Rem or even milliRem? those are the units that the industry uses. BTW, the NRC allows annual TEDE to reach 5 rem. That's Total Effective Dose Equivalent.


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