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FBaggins Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-21-11 04:49 PM
Original message
Grey smoke from No.3 reactor subsided
The grey smoke seen coming from the troubled No.3 reactor of the Fukushima Daiichi nuclear power plant on Monday afternoon has subsided. The government's nuclear safety agency said the smoke, which turned black and grey, subsided about 2 hours later.

The smoke was apparently coming from the south edge of the reactor structure. The storage pool for spent nuclear fuel is located in the southeast part of the structure.

Radiation levels at a spot about 500 meters northwest of the reactor were 2,015 microsieverts per hour, almost unchanged from the figure measured before the smoke was seen.

Smoke was also seen rising from another troubled reactor Monday evening. The government's nuclear safety agency says it was informed that white smoke was apparently coming from a crack in the roof of the No.2 reactor structure at 6:20 PM. Similar white smoke had been seen rising from the reactor previously.

http://www3.nhk.or.jp/daily/english/21_h30.html
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aquart Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-21-11 05:01 PM
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1. They said the white smoke was steam.
But they still haven't a clue what the grey smoke was?
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FBaggins Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-21-11 05:07 PM
Response to Reply #1
2. So it seems. But I haven't read of any firefighting efforts.
If the smoke died out on its own, it isn't the fuel pool.
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ReturnoftheDjedi Donating Member (839 posts) Send PM | Profile | Ignore Mon Mar-21-11 05:11 PM
Response to Original message
3. keep juggling, Frodo. They don't know where the smoke is coming from.
Doesn't that trouble you?
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FBaggins Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-21-11 05:15 PM
Response to Reply #3
4. If it stops on its own?
Do you think a dry fuel pool that catches fire is going to just stop burning?

I don't have the foggiest idea what the source of the fire it, and that is a concern. I do know that there's lots of damage to the building. It wouldn't be unheard of to have a fire.
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ReturnoftheDjedi Donating Member (839 posts) Send PM | Profile | Ignore Mon Mar-21-11 05:23 PM
Response to Reply #4
5. why would a normal fire cause a radiation spike?
Edited on Mon Mar-21-11 05:24 PM by ReturnoftheDjedi
that's right, it wouldn't.

The smoke is from either the pool or the reactor.
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FBaggins Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-21-11 05:28 PM
Response to Reply #5
6. Why would a fuel fire have radiation levels drop back down?
That's right, it wouldn't.

Anything that disturbs dust from inside the building is likely to kick out some radiation. That "spike" wasn't much of a spike.

And that's the telling factor. A fuel fire would have a REAL spike. Something that couldn't be argued.
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