Fukushima upgraded to Cat 7 TEPCO: Radiation leak may have topped Chernobyl release

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shira

Diamond Member
Jan 12, 2005
9,567
6
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http://www.washingtonpost.com/natio...n-fears/2011/03/15/ABwTmha_story.html?hpid=z1

New assessments of the explosion at unit 2 of Japan’s stricken Fukushima Daiichi nuclear plant Tuesday heightened fears that it will begin spewing large amounts of radiation.

Radiation readings from troubles throughout the plant spiked so high that the remaining skeleton crew of workers was at least temporarily ordered to abandon their posts, Chief Cabinet Secretary Yukio Edano said at a press conference Wednesday.

The draw-down of the plant’s workers “is a sign to me that they have given up trying to prevent a disaster and gone into the mode of trying to clean up afterward,” said nuclear engineer Arnie Gundersen.

and

http://www.salon.com/news/japan_ear...ure/2011/03/15/japan_nuclear_plant_evacuation

Japan suspended operations to prevent a stricken nuclear plant from melting down Wednesday after a surge in radiation made it too dangerous for workers to remain at the facility.

Chief Cabinet Secretary Yukio Edano said work on dousing reactors with water was disrupted by the need to withdraw.

The level of radiation at the plant surged to 1,000 millisieverts early Wednesday before coming down to 800-600 millisieverts. Still, that was far more than the average

"So the workers cannot carry out even minimal work at the plant now," Edano said. "Because of the radiation risk, we are on standby."
 
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nageov3t

Lifer
Feb 18, 2004
42,816
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after a week of constantly hearing people talk about how the media is sensationalizing all of this, when is the time to start worrying?
 

techie81

Senior member
Feb 11, 2008
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Now what? They watch it catch on fire? There has to be some kind of procedure to stop these fucking things.
 

wuliheron

Diamond Member
Feb 8, 2011
3,536
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Now what? They watch it catch on fire? There has to be some kind of procedure to stop these fucking things.


Maybe in fifty years we'll have robots we can send in there that are shielded from the radiation and can be quietly buried later, but right now there isn't a damn thing we can do. If they do meltdown about all we can do for awhile is dump water on them from helicopters. They knew when they built the damn things better designs were available that were practically foolproof and chose to go cheap.
 
Feb 19, 2001
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I remember reading that when the Russians had their little accident, the workers were standing on the roof pouring shit in basically: They knew they'd be goners but did it anyways because it needed to be done.

I wonder if it's going to come to that for Japan...ask for some volunteers to go back in, knowing what the consequences will be....

Chuck

Oh come on there's better ways. Even a flyover and pouring stuff on would be better. The firefighters at Chernobyl had no idea what they were dealing with. At best you'd think "Oh yeah it might be radioactive." But you'd trust the plant management with calling you in.

In 1986, you didn't have the web to hit up and read a bunch of crap while you were on your way to the scene. You just roll with it. And plenty of people in this country still have no idea of how bad radiation is and half lifes and what not...
 

Rezag3000

Member
Jul 11, 2005
99
0
0
Fossil fuels burn and turn into CO2 and other combustion gases, and minerals. No radiation.

Actually, burning coal releases radioactive isotopes that were contained in the coal. If a nuclear power plant functions correctly, it releases less radiation than does a coal power plant.
 

Acanthus

Lifer
Aug 28, 2001
19,915
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ostif.org
after a week of constantly hearing people talk about how the media is sensationalizing all of this, when is the time to start worrying?

Now is the time to start worrying, this is a full nuclear release.

1 sievert per hour is fatal. (1 sievert is a fatal dose)

They really fucked this up to let it get this bad.
 

quikah

Diamond Member
Apr 7, 2003
4,086
664
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Sorry, but that Washington post story just smacks of bad journalism. Do a bit of googling on Arnie Gundson. He is an expert witness for the anti-nuke crowd. He left the industry in the 90s with a serious chip on his shoulder. He may be right, but his background really leads me to question his motives.

The bits I have been reading do not indicate any sort of abandonment,but a temporary pause, which is probably over by now.
 
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JSt0rm

Lifer
Sep 5, 2000
27,399
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interesting npr debate happened tonght. Basically the only way nuclear works in this country is with massive subsidies incase the project isnt accepted the tax payer is on the dime AND insurance is too great on these things so the companies need protection from damages if something actually goes wrong. Anytime you need both of those things for your industry to work it doesnt seem like a good industry to get into.
 

Steeplerot

Lifer
Mar 29, 2004
13,051
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Most recent pic on the net I know of. Not pretty.






That is #3 on the left.The fuel pool is gone. Reactor probably now also.
 
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Anneka

Senior member
Jan 28, 2011
396
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Also search on the internet of some pictures from the Cernobal incident in 1986. Another disaster that was felt more badly in the Eastern Europe.
 

Doppel

Lifer
Feb 5, 2011
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Having spent no time at all as a fireman but watching a few water dumps from planes on TV I have to conclude that if they are dropping or thinking of dropping water onto this plant from a helicopter they are completely out of options that are actually good because the amount of water they can get in on the scene with that approach is very little and not easily targeted.

France is now telling its citizens to leave Tokyo, which is a couple hundred miles south, presumably because of radioactive air. http://www.philly.com/philly/news/nation_world/118064164.html

I would get the eff out of dodge if I was in Japan. See where the wind is and head toward it.

The remaining workers at the plant were taken away because of radiation but are preparing to return. I presume they know they are being exposed to some nasty stuff, that is heroic. http://news.yahoo.com/s/ap/as_japan_earthquake
 

Jeff7

Lifer
Jan 4, 2001
41,599
19
81
Maybe in fifty years we'll have robots we can send in there that are shielded from the radiation and can be quietly buried later, but right now there isn't a damn thing we can do. If they do meltdown about all we can do for awhile is dump water on them from helicopters. They knew when they built the damn things better designs were available that were practically foolproof and chose to go cheap.
Hopefully in 50 years we'll have Gen IV reactors which aren't capable of this kind of failure mode.
(Or rather, hopefully in 20 years we'll have Gen IV reactors, and in 50 years we'll have fusion reactors.)
 

Doppel

Lifer
Feb 5, 2011
13,306
3
0
Hopefully in 50 years we'll have Gen IV reactors which aren't capable of this kind of failure mode.
(Or rather, hopefully in 20 years we'll have Gen IV reactors, and in 50 years we'll have fusion reactors.)
Good luck with that. Every day this goes on is another nail in the coffin of nuclear power in this country.
 

GTaudiophile

Lifer
Oct 24, 2000
29,776
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Helicopters...

Those pilots are being exposed to very high doses. It reminds me of Chernobyl in so many ways...and most if not all of those pilots died within weeks/months due to radiation poisoning.

Those pilots are well aware of this and are doing it anyway. Respect.
 

GTaudiophile

Lifer
Oct 24, 2000
29,776
31
81
Good luck with that. Every day this goes on is another nail in the coffin of nuclear power in this country.

This is my greatest concern. I have no love for the current state of nuclear power technology but we cannot stop R&D. We have to move forward and eventually get ourselves to Fusion!
 
Dec 26, 2007
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Good luck with that. Every day this goes on is another nail in the coffin of nuclear power in this country.

Unfortunately that is most likely what the result of all this will be. Another ~20 years of people equating nuclear to Chernobyl and not wanting to build it.
 

rcpratt

Lifer
Jul 2, 2009
10,433
110
116
Helicopters...

Those pilots are being exposed to very high doses. It reminds me of Chernobyl in so many ways...and most if not all of those pilots died within weeks/months due to radiation poisoning.

Those pilots are well aware of this and are doing it anyway. Respect.
There have been no helicopter flyovers are far as I know.

Now is the time to start worrying, this is a full nuclear release.

1 sievert per hour is fatal. (1 sievert is a fatal dose)

They really fucked this up to let it get this bad.
~4.5 Sv (450 rem) is the LD50/30. Last I heard last night, the Japanese government had increased the occupational limit from 0.1 Sv (10 rem) to 0.25 Sv (25 rem) so that the workers could address the Unit 4 SNF pool situation.

That is #3 on the left.The fuel pool is gone. Reactor probably now also.
Nothing is gone. Radioactive readings would be so much higher if the fuel pool or reactor was laying in pieces on the ground. Don't make shit up.
 
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Darwin333

Lifer
Dec 11, 2006
19,946
2,329
126
I remember reading that when the Russians had their little accident, the workers were standing on the roof pouring shit in basically: They knew they'd be goners but did it anyways because it needed to be done.

I wonder if it's going to come to that for Japan...ask for some volunteers to go back in, knowing what the consequences will be....

Chuck

Where the hell is Spock when you need him?
 

Tom

Lifer
Oct 9, 1999
13,293
1
76
I welcome any critique or corrections of the following..

I would think it would be hard to resubmerge the spent fuel rods. If they are hot enough to burn, then you would have to add water at a high rate or it would just turn to steam. And if you could add water fast enough to exceed the rate at which it becomes steam, the water would take quite a while to cool the spent fuel below the boiling point, so you would have to replenish the pool somehow for quite a while.

I doubt helicopters could add water fast enough to accomplish anything. Maybe knock a hole in the building and create a manmade tsunami using very large dump trucks to add lots of water as quickly as possible.
 

the DRIZZLE

Platinum Member
Sep 6, 2007
2,956
1
81
I welcome any critique or corrections of the following..

I would think it would be hard to resubmerge the spent fuel rods. If they are hot enough to burn, then you would have to add water at a high rate or it would just turn to steam. And if you could add water fast enough to exceed the rate at which it becomes steam, the water would take quite a while to cool the spent fuel below the boiling point, so you would have to replenish the pool somehow for quite a while.

I doubt helicopters could add water fast enough to accomplish anything. Maybe knock a hole in the building and create a manmade tsunami using very large dump trucks to add lots of water as quickly as possible.

When the water turns to steam its still removing heat from the rods, it actually removes more heat that way.
 
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