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Kyoto U. expert: Melted fuel may have sunk into ground — “We are now head to head with a situation that mankind has never faced before”

 
Anonymous Coward
User ID: 1542048
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09/09/2011 05:47 PM
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Kyoto U. expert: Melted fuel may have sunk into ground — “We are now head to head with a situation that mankind has never faced before”
[...] At the No. 1 reactor, there’s a chance that melted fuel has burned through the bottom of the pressure vessel, the containment vessel and the floor of the reactor building, and has sunk into the ground. [...]

It’s doubtful that there’s even a need to keep pouring water into the No.1 reactor, where nuclear fuel is suspected to have burned through the pressure vessel. [...]

Recovering the melted nuclear fuel is another huge challenge. I can’t even imagine how that could be done. When the Three Mile Island accident took place in 1972, the melted nuclear fuel had stayed within the pressure vessel, making defueling possible. With Fukushima, however, there is a possibility that nuclear fuel has fallen into the ground, in which case it will take 10 or 20 years to recover it. We are now head to head with a situation that mankind has never faced before. [...]

[link to mdn.mainichi.jp]
Anonymous Coward (OP)
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09/09/2011 05:47 PM
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Re: Kyoto U. expert: Melted fuel may have sunk into ground — “We are now head to head with a situation that mankind has never faced before”
bump
dogmeat2112

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09/09/2011 05:53 PM
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Re: Kyoto U. expert: Melted fuel may have sunk into ground — “We are now head to head with a situation that mankind has never faced before”
Oh Shit!!!!!!!!!!!!!!!!!bump
Kael

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09/09/2011 05:56 PM
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Re: Kyoto U. expert: Melted fuel may have sunk into ground — “We are now head to head with a situation that mankind has never faced before”
[...] At the No. 1 reactor, there’s a chance that melted fuel has burned through the bottom of the pressure vessel, the containment vessel and the floor of the reactor building, and has sunk into the ground. [...]

It’s doubtful that there’s even a need to keep pouring water into the No.1 reactor, where nuclear fuel is suspected to have burned through the pressure vessel. [...]

Recovering the melted nuclear fuel is another huge challenge. I can’t even imagine how that could be done. When the Three Mile Island accident took place in 1972, the melted nuclear fuel had stayed within the pressure vessel, making defueling possible. With Fukushima, however, there is a possibility that nuclear fuel has fallen into the ground, in which case it will take 10 or 20 years to recover it. We are now head to head with a situation that mankind has never faced before. [...]

[link to mdn.mainichi.jp]
 Quoting: Anonymous Coward 1542048


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Anonymous Coward (OP)
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09/09/2011 08:21 PM
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Re: Kyoto U. expert: Melted fuel may have sunk into ground — “We are now head to head with a situation that mankind has never faced before”
Dr. Koide: Massive amounts of radioactivity may again be released from Fukushima — Mentions “steam explosion” from melted fuel hitting water

Hiroaki Koide, radiation metrology and nuclear safety expert at Kyoto University’s Research Reactor Institute shares what he thinks may happen in the coming weeks, months and years

[...] At present, I believe that there is a possibility that massive amounts of radioactive materials will be released into the environment again. [...]

t is necessary to keep cooling the No. 2 and 3 reactors, which are believed to still contain some fuel, but the cooling system itself is unstable. If the fuel were to become overheated again and melt, coming into contact with water and trigger a steam explosion, more radioactive materials will be released. [...]

[link to mdn.mainichi.jp]





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