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[Various] Japan Nuclear Emergency - Continuous Coverage of Damage and Radiation Risks - Page 172  

post #1711 of 2836
Interesting read:

Quote:
Nuke engineer: Fuel rod fire at Fukushima reactor “would be like Chernobyl on steroidsâ€
Quote:
Two days later, the nearby building containing the plutonium-uranium (MOX) fueled Fuksuhima Daichii reactor unit 3 exploded. So why bother about the rubble of reactor No 1? The WaPo quotes a nuclear engineer who knows the answer:

" Although Tokyo Electric said it also continued to deal with cooling system failures and high pressures at half a dozen of its 10 reactors in the two Fukushima complexes, fears mounted about the threat posed by the pools of water where years of spent fuel rods are stored.

At the 40-year-old Fukushima Daiichi unit 1, where an explosion Saturday destroyed a building housing the reactor, the spent fuel pool, in accordance with General Electric’s design, is placed above the reactor. Tokyo Electric said it was trying to figure out how to maintain water levels in the pools, indicating that the normal safety systems there had failed, too. Failure to keep adequate water levels in a pool would lead to a catastrophic fire, said nuclear experts, some of whom think that unit 1’s pool may now be outside.

“That would be like Chernobyl on steroids,†said Arnie Gundersen, a nuclear engineer at Fairewinds Associates and a member of the public oversight panel for the Vermont Yankee nuclear plant, which is identical to the Fukushima Daiichi unit 1.

People familiar with the plant said there are seven spent fuel pools at Fukushima Daiichi, many of them densely packed.

Gundersen said the unit 1 pool could have as much as 20 years of spent fuel rods, which are still radioactive. "

We’d be lucky if we only had to worry about the spent fuel rods from a single holding pool. We’re not that lucky. The Fukushima Daiichi plant has seven pools for spent fuel rods. Six of these are (or were) located at the top of six reactor buildings. One “common pool†is at ground level in a separate building. Each “reactor top†pool holds 3450 fuel rod assemblies. The common pool holds 6291 fuel rod assemblies. [The common pool has windows on one wall which were almost certainly destroyed by the tsunami.] Each assembly holds sixty-three fuel rods. This means the Fukushima Daiichi plant may contain over 600,000 spent fuel rods.
http://my.firedoglake.com/kirkmurphy...l-on-steroids/
Edited by XAslanX - 3/15/11 at 3:37pm
post #1712 of 2836
Quote:
Originally Posted by XAslanX View Post
Interesting read:
^ This is why a fire at Reactor 4 might turn bad. Reactor 4 is housing spent fuel in a temporary tank whilst the main pool is being refurbed, as I understand it.
post #1713 of 2836
Quote:
Originally Posted by XAslanX View Post
......... .......... Crap
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post #1714 of 2836
So fire in spent fuel rods = big problem? :O
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post #1715 of 2836
Quote:
Originally Posted by jjsoviet View Post
So fire in spent fuel rods = big problem? :O
Nuke engineer: Fuel rod fire at Fukushima reactor “would be like Chernobyl on steroids†apparently so...
post #1716 of 2836
1. Get tanker truck full of liquid nitrogen
2. Pump liquid nitrogen into holding tank
3. ?? epic win?
4. japan saves the day?
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post #1717 of 2836
just got a bbc news flash on my phone

fire happening at the Fukushima Reactor 4
http://www.bbc.co.uk/news/world-asia-pacific-12754883
Quote:
There has been a fresh fire at the quake-stricken Fukushima Daiichi nuclear plant in northern Japan.

The new blaze began at reactor four. The plant has already been hit by four explosions, triggering radiation leaks and sparking health concerns.

More than 3,000 have been confirmed dead and thousands are missing following Friday's 9.0-magnitude quake and tsunami in north-east Japan.

The disaster has damaged the nuclear plant's cooling functions.

Officials have warned people within 20-30km of the site to either leave the area or stay indoors.
post #1718 of 2836
Quote:
Originally Posted by jjsoviet View Post
So fire in spent fuel rods = big problem? :O
seems to be that way, as the rods are combusting, the smoke particals are carrying the radiation into the atmosphere... am i right?
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post #1719 of 2836
Quote:
Originally Posted by omega17 View Post
^ This is why a fire at Reactor 4 might turn bad. Reactor 4 is housing spent fuel in a temporary tank whilst the main pool is being refurbed, as I understand it.
http://www.livestation.com/channels/...-world-english
The area is inaccessible right now due to extremely high radiation levels. I didn't catch what the lady said the level was but they can not extinguish the fire at this time they are hoping it will go out naturally
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post #1720 of 2836
Quote:
Originally Posted by strap624 View Post
1. Get tanker truck full of liquid nitrogen
2. Pump liquid nitrogen into holding tank
3. ?? epic win?
4. japan saves the day?
Unfortunatly as that may seem a good idea, but the liquid nitrogen can weaken the containment vessel holding the fuel rods. which is bad. the reason why there using water/sea water is because they are pumping boron into the reactor aswell (a poison to stop the fusion process)
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