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post #2071 of 2836
Darmic, quick question regarding the exposed spent fuel in the cooling pools. If reports are correct that the fuel is no longer submerged in water, and according to anything I have seen there is no other kind of shielding over the spent fuel pools, would these just continue to heat and eventually melt, while releasing radiation, or is there any way there could be more violent reactions that start to occur as the temps climb? Is there any way this fuel could get hot enough to kick start a nuclear reaction at all? Since there are no control rods or any other isolation in place in these pools, if the fuel melts and combines at the base of the pool could that start a full on runaway/meltdown?

Also just to note, since the #4 reactor was shut down just days before the quake, I have heard a few unconfirmed reports the fuel which was taken out and placed in the cooling pond is not completely spent fuel, which they had planned on re-installing to the reactor when they were to recommission it.

Any thoughts about this?
post #2072 of 2836
Quote:
Originally Posted by Digigami View Post
Darmic, quick question regarding the exposed spent fuel in the cooling pools. If reports are correct that the fuel is no longer submerged in water, and according to anything I have seen there is no other kind of shielding over the spent fuel pools, would these just continue to heat and eventually melt, while releasing radiation, or is there any way there could be more violent reactions that start to occur as the temps climb? Is there any way this fuel could get hot enough to kick start a nuclear reaction at all? Since there are no control rods or any other isolation in place in these pools, if the fuel melts and combines at the base of the pool could that start a full on runaway/meltdown?

Also just to note, since the #4 reactor was shut down just days before the quake, I have heard a few unconfirmed reports the fuel which was taken out and placed in the cooling pond is not completely spent fuel, which they had planned on re-installing to the reactor when they were to recommission it.

Any thoughts about this?
This is where my knowledge is extremely limited because my ship used the same fuel plates for 25 years before needing a refueling. From the quick research I did, storage of spent fuel varies from plant to plant. So, I really have no idea what containment they use in these plants for this spent fuel. What I can tell you is that spent fuel IS radioactive, and does have some decay heat. This decay heat becomes less significant with age. When they decay enough that they are not generating a significant amount of heat, they get encased in cement, and apparently stored on site. Fuel plates are also loaded with poisons (they help shape neutron flux), and it doesn't pose any concern of causing a fission chain reaction due to the totally mixed bag of decay products. But while it decays, it emits radiation, so I wouldn't try eating one, or keeping it in your house.

The last statement about some partially spent fuel...that could be bad. Surely they have it stored in proper containment. They wouldn't keep it in water alone, as water is the catalyst for thermal fission.

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post #2073 of 2836
From what I've read and understand, there's more shielding but it was probably damaged in the fire, partially exposing the fuel.
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post #2074 of 2836
my god...those men are brave
post #2075 of 2836
what is the maximum amount of time the rods can be left exposed before irrepable damage occurs?
    
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post #2076 of 2836
I think that it is seriously a good idea to evacuate more of the area, just my opinion. The US is making the right move there and with the use of Global Hawk...that's just badass. That thing is gonna shed some light on those reactors.
post #2077 of 2836
What kind of radiation is coming out of the reactors compared to yesterday?
post #2078 of 2836
Anyone post this yet?

Japan nuclear plant: Just 48 hours to avoid 'another Chernobyl'

http://www.telegraph.co.uk/news/worl...Chernobyl.html
post #2079 of 2836
Quote:
Originally Posted by 8-Ball View Post
Anyone post this yet?

Japan nuclear plant: Just 48 hours to avoid 'another Chernobyl'

http://www.telegraph.co.uk/news/worl...Chernobyl.html
*sigh* Im sorry to burst the telegraph's bubble, but this is not going to be anywhere near a chernobyl disaster... Its a totally different situation for a start. Fukushima is from overheating/meltdown. Chernobyl was from overload and an explosion exposing the core and spreading parts of graphite all over the damn place.

Edit: When the heck did any of the volounteers die or go missing? did i miss something??
Edited by Buzzin92 - 3/16/11 at 7:22pm
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post #2080 of 2836
^ BS to say the least
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