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[Various] Japan Nuclear Emergency - Continuous Coverage of Damage and Radiation Risks - Page 179  

post #1781 of 2836
It's not unsafe. Cars have headlights. It's coming up to a full moon also.

I just thought it would be one of the first things to go in a widespread need to conserve energy
post #1782 of 2836
Quote:
Originally Posted by omega17 View Post
It's not unsafe. Cars have headlights. It's coming up to a full moon also.

I just thought it would be one of the first things to go in a widespread need to conserve energy
Then why are street lights made in the first place?
post #1783 of 2836
Quote:
Originally Posted by Obakemono View Post
*snip* A reactor just does not cool off in 4 hours, it is more like 3 months in a controlled way, or in a scram about 4-5 days to get the core under 100c (boiling point of water).
At the extremely high pressures inside a [working] reactor, water doesn't boil at 100C. It boils much higher. This is the main issue with a loss of pressure in a reactor.

Lets not get into a debate about the necessity of street lighting
post #1784 of 2836
Wasn't the fire in reactor 4 put out quite awhile ago?
That's old news
post #1785 of 2836
Quote:
Originally Posted by xd_1771 View Post
Wasn't the fire in reactor 4 put out quite awhile ago?
That's old news
They said it either never whent out or caught fire again...

The VITAL point that they are keeping suspiciously quiet about is what exactly is burning.

From what iv just heard on NHK the reporter asked what exactly is burning. His reply was strange to say the least. He 1st said it was hydrogen, then said it wasnt hydrogen as hydrogen explodes and doesnt burn. He then said there is a possibility that its the fuel dump burning.
Edited by Flack88 - 3/15/11 at 5:07pm
post #1786 of 2836
Quote:
Originally Posted by xd_1771 View Post
Wasn't the fire in reactor 4 put out quite awhile ago?
That's old news
It was another fire.

edit:
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post #1787 of 2836
Damn, reactor after reactor keeps going. I feel so bad, I wish there was someway we could all contribute our cooling systems cooling and combine it and cool the reactors from our homes. I know that's impossible, but I'm just saying I wish there was something we could do
post #1788 of 2836
Quote:
Originally Posted by v639dragoon View Post
Damn, reactor after reactor keeps going. I feel so bad, I wish there was someway we could all contribute our cooling systems cooling and combine it and cool the reactors from our homes. I know that's impossible, but I'm just saying I wish there was something we could do
OCN to save the COUNTRY! That'd be great.
post #1789 of 2836
It was a new fire, worryingly was only spotted by an employee who was 'carrying batteries'

Details are rather vague, but I like the way the reporters are grilling the TEPCO officials especially; yesterday they were even more forceful with their questionning. Seems like they're tired of being drip-fed half-truths
post #1790 of 2836
Quote:
Originally Posted by strap624 View Post
Why is this nuclear engineer saying that this is going to be chernobyl on steroids?? Haven't we discussed in this thread that a situation like that is highly unlikely with this type of reactor??


It is not the reactor(s) that would cause the release of radiation. The core(s) are not at risk of catching on fire while exposed to the atmosphere.

The storage tank filled with old fuel rods is the concern. Those spent fuel rods are cooler than the core of the reactor, but still produce enough heat to light themselves on fire. To prevent a fire, they are kept under water, and that water is circulated through a heat exchange to keep it cool.

If the circulation system is broken and the pools are boiling, that would produce enough hydrogen to cause the explosions we've seen. If the pools are boiling, then the water level is dropping. It would be very bad if the spent fuel became uncovered and started to burn. The pools are not enclosed like the reactor core is - the water is the only shielding between the spent fuel and the atmosphere. If the spent fuel begins to burn, it will send up a cloud of radioactive dust. The radioactive elements in spent fuel rods have a longer half-life than what was released by Chernobyl, and there is more material in a storage pool than was present in that ill-fated reactor. However, unlike Chernobyl, there will not be a partial nuclear detonation that blasts globs of molten uranium for miles in all directions.
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