Japan Earthquake/Tsunami

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Japan Earthquake/Tsunami
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By 2011-03-12 16:50:48
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 Ragnarok.Harpunnik
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By Ragnarok.Harpunnik 2011-03-12 16:51:49
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Pandemonium.Spicyryan said:
Bismarck.Nevill said:
Bismarck.Josiahfk said:
Pandemonium.Spicyryan said:
Sylph.Zenairis said:
I can't believe some of these people they still can't let that grudge go... there's many good people over in Japan and Japan is one of our close allies now. Is this one thread on Facebook or a bunch?
It is amazing how anyone can think after dropping two nuclear bombs on Japan that mentioning Pearl Harbor after such a terrible natural disaster is even justified in anyway. I mean I would say two bombs like that on a country > a battle, but hey that is just me..
This really shocked me coming from you spicy. They were both horrible situations where many lives were lost and neither you nor I have the capacity or right to truly quantify them like that. -_-
Bismarck.Nevill said:
Ragnarok.Afania said:
Pandemonium.Spicyryan said:
Sylph.Zenairis said:
I can't believe some of these people they still can't let that grudge go... there's many good people over in Japan and Japan is one of our close allies now. Is this one thread on Facebook or a bunch?
It is amazing how anyone can think after dropping two nuclear bombs on Japan that mentioning Pearl Harbor after such a terrible natural disaster is even justified in anyway. I mean I would say two bombs like that on a country > a battle, but hey that is just me..
Those who suffered because of earthquake are just citizens, they have nothing to do with pearl harbor, politics and war. So no, they don't deserve this in anyway.
Yeah, I wonder what percentage of the affected were alive in 1942...
Almost 60 years ago? yeah good question if any
68*
69*

You mean like people who are still bothered by the civil war and the confederate flag? And how no one would be offended by a mitsuibishi parked in a parking lot at Pearl Harbor.

BTW I in no way thought of Pearl Harbor when I saw this. Hope there is a speedy recovery and speedy rebuilding.
 
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By 2011-03-12 16:55:30
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 Caitsith.Taazy
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By Caitsith.Taazy 2011-03-12 16:58:41
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2252: Reuters: Operators are preparing to release radioactive steam from the number three reactor at Fukushima No. 1 plant, after the cooling system failed there
 Cerberus.Liandaru
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By Cerberus.Liandaru 2011-03-12 16:59:25
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I'm at my mom's, so on my cell andd not on a computer. CNN juust said Fukashima has had a catastrophic event and is heading for meltdown. Links please?
 Quetzalcoatl.Kanjirou
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By Quetzalcoatl.Kanjirou 2011-03-12 17:01:38
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Just woke up. Am I reading right that they got the no. 1 reactor under control, but that this new stuff is at reactor no. 3? It sounds like the same problems facing no. 1 last night are facing no. 3 now.
 Valefor.Slipispsycho
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By Valefor.Slipispsycho 2011-03-12 17:04:30
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Cerberus.Liandaru said:
I'm at my mom's, so on my cell andd not on a computer. CNN juust said Fukashima has had a catastrophic event and is heading for meltdown. Links please?
This was apparently posted 15 mins ago..
link

I can't really do a very thorough search atm, I'm busy cooking.
 Valefor.Krishpy
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By Valefor.Krishpy 2011-03-12 17:07:59
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Was looking around news sites to see if anyone thought that the tons of sardines we're still cleaning up here was maybe related. Like the fish knew what was coming and got spooked and lost in the harbor. o_o;
 
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By 2011-03-12 17:08:19
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 Bahamut.Dasva
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By Bahamut.Dasva 2011-03-12 17:10:16
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Ewww direct sea water injection and chemical shutdown... guess they really are worried. Well that reactor is useless now lol
 
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By 2011-03-12 17:12:13
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 Bismarck.Luuujeje
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By Bismarck.Luuujeje 2011-03-12 17:13:40
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Will the sea water they pumped into the plant be radioactively contaminated? If so, what will they do with that sea water? Put back to the ocean? Will this cause problem in the future for the fishing? Japan diet depends largely on fishing, I believe.
And it won't stay in pacific ocean only, I think.
Wow... We are all gonna have big consequences. ..
 Quetzalcoatl.Kanjirou
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By Quetzalcoatl.Kanjirou 2011-03-12 17:13:43
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Asura.Catastrophe said:
Valefor.Slipispsycho said:
Cerberus.Liandaru said:
I'm at my mom's, so on my cell andd not on a computer. CNN juust said Fukashima has had a catastrophic event and is heading for meltdown. Links please?
This was apparently posted 15 mins ago..
link

I can't really do a very thorough search atm, I'm busy cooking.

Chernobyl style nuclear event isn't possible on a BWR, but okay.

So like is this another system this is happening to? I thought they had fed and bled seawater into it.


Could you elaborate on that a bit? Physically, what happened at Chernobyl? My vague understanding is that the fuel melted even after the reactor shut down, fused together and went critical again. What's different about a BWR and what they're doing that would prevent this?
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By Serj 2011-03-12 17:19:59
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Cerberus.Liandaru said:
I'm at my mom's, so on my cell andd not on a computer. CNN juust said Fukashima has had a catastrophic event and is heading for meltdown. Links please?

I just heard on CNN that it's likely that the reactor is in the process of having a meltdown.

Is Japan downplaying the problems they're having with the reactor or is world-wide news exaggerating?
 Quetzalcoatl.Kanjirou
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By Quetzalcoatl.Kanjirou 2011-03-12 17:21:11
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Serj said:
Is Japan downplaying the problems they're having with the reactor or is world-wide news exaggerating?

I think that's a question we're going to be asking ourselves for the next few days/weeks lol
 
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By 2011-03-12 17:21:20
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 Bahamut.Dasva
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By Bahamut.Dasva 2011-03-12 17:22:16
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Quetzalcoatl.Kanjirou said:
Could you elaborate on that a bit? Physically, what happened at Chernobyl? My vague understanding is that the fuel melted even after the reactor shut down, fused together and went critical again. What's different about a BWR and what they're doing that would prevent this?
While certainly not good peices of the reactor still being critical to this day I believe isn't what made it the only lvl 7 nuclear event. It was the massive release of fission products and fuel etc to very large area.

Part of it had to deal with the way it operated to cause such an extreme and quick power surge. Like when things got out of hand and they tried to shut down it ended up making things worse. Poor design and even poor handling of things (but really it was the night shift that shouldn't even have been doing the testing). And well this reactor is shutdown good so heat generation is minimal so not gunna super heat it causing rediculously big explosions. Plus they used graphite moderators which ended up catching fire after being exposed from several large steam explosions sending radioactive smoke up for decent distances
 
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By 2011-03-12 17:24:39
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 Bahamut.Dasva
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By Bahamut.Dasva 2011-03-12 17:25:04
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Serj said:
Is Japan downplaying the problems they're having with the reactor or is world-wide news exaggerating?
Probably a bit of both. Japan tends to be less than forthcoming with such things in the past and well people on the outside like to speculate and worry. After all need something to talk about besides charlie sheen
 Bismarck.Luuujeje
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By Bismarck.Luuujeje 2011-03-12 17:25:15
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Ty catastrophe for answer. U seem to know a lot about these stuffs. Awesome ^.^
 Quetzalcoatl.Xueye
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By Quetzalcoatl.Xueye 2011-03-12 17:27:41
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Asura.Catastrophe said:
BWRs can't physically do that because they function on a Negative Temperature Coefficient of Reactivity because reactor power is based on steam demand, not at Rod pullout. The hotter water is, the more expanded molecules become, harder for fission to occur. There is no graphite being used at all, which accelerates neutron flux.

wat

Christ, you know a lot about this stuff. You a physicist, engineer, something?
 Quetzalcoatl.Kanjirou
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By Quetzalcoatl.Kanjirou 2011-03-12 17:28:43
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Asura.Catastrophe said:
Chernobyl is a case of terrible reactor design. Basically they were testing equipment to allow proper electrical handoff from their generators and while doing a startup. Their fuel rods are graphite tipped, which contributes to what they call a "Positive Temperature Coefficient of Reactivity" creates a power spike while it goes to SCRAM and displaces coolant on top of an already ever increasing positive void system that ends up causing an explosion.

So the SCRAM didn't even successfully complete at Chernobyl, like it did here? I don't know what a positive void system is, but it sounds like you're saying that the fact that they used graphite-tipped fuel rods allowed it to overheat more easily, bubble away coolant, and go kablooey.

(Man, didn't Dasva say SL1 used graphite? Graphite sucks.)

I imagine Chernobyl didn't have access to an unlimited amount of seawater, too.
 
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By 2011-03-12 17:29:23
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 Quetzalcoatl.Xueye
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By Quetzalcoatl.Xueye 2011-03-12 17:30:06
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Asura.Catastrophe said:
Quetzalcoatl.Xueye said:
Asura.Catastrophe said:
BWRs can't physically do that because they function on a Negative Temperature Coefficient of Reactivity because reactor power is based on steam demand, not at Rod pullout. The hotter water is, the more expanded molecules become, harder for fission to occur. There is no graphite being used at all, which accelerates neutron flux.

wat

Christ, you know a lot about this stuff. You a physicist, engineer, something?

~_~ sorry. lol D:

Oh no, I'm just curious lol. I got to an engineering school and only people who really study this ***can give an answer anywhere near as good as you do.
 Asura.Ebry
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By Asura.Ebry 2011-03-12 17:30:33
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Quetzalcoatl.Xueye said:
Asura.Catastrophe said:
BWRs can't physically do that because they function on a Negative Temperature Coefficient of Reactivity because reactor power is based on steam demand, not at Rod pullout. The hotter water is, the more expanded molecules become, harder for fission to occur. There is no graphite being used at all, which accelerates neutron flux.

wat

Christ, you know a lot about this stuff. You a physicist, engineer, something?

This might help?
 
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By 2011-03-12 17:30:36
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 Quetzalcoatl.Kanjirou
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By Quetzalcoatl.Kanjirou 2011-03-12 17:30:45
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Asura.Catastrophe said:
BWRs can't physically do that because they function on a Negative Temperature Coefficient of Reactivity because reactor power is based on steam demand, not at Rod pullout. The hotter water is, the more expanded molecules become, harder for fission to occur. There is no graphite being used at all, which accelerates neutron flux.

/cheer

Relax, people, Chernobyl comparisons are nonsense. The physics is completely different here.
 Quetzalcoatl.Taxero
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By Quetzalcoatl.Taxero 2011-03-12 17:30:46
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Quetzalcoatl.Xueye said:
Asura.Catastrophe said:
BWRs can't physically do that because they function on a Negative Temperature Coefficient of Reactivity because reactor power is based on steam demand, not at Rod pullout. The hotter water is, the more expanded molecules become, harder for fission to occur. There is no graphite being used at all, which accelerates neutron flux.

wat

he says we need one point twenty-one gigawatts to power up the flux capacitator !
 Valefor.Slipispsycho
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By Valefor.Slipispsycho 2011-03-12 17:34:50
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Quetzalcoatl.Kanjirou said:
Asura.Catastrophe said:
BWRs can't physically do that because they function on a Negative Temperature Coefficient of Reactivity because reactor power is based on steam demand, not at Rod pullout. The hotter water is, the more expanded molecules become, harder for fission to occur. There is no graphite being used at all, which accelerates neutron flux.

/cheer

Relax, people, Chernobyl comparisons are nonsense. The physics is completely different here.
As far as I can tell, all he's saying that can't happen Chernobyl style, is blowing the top off the reactor core.. It doesn't mean that this couldn't turn into an environmental tragedy if it isn't brought under control.

Correct me if I'm wrong.. It seems they've already bricked one reactor, I really doubt if it was just safe to let it do whatever that they would still be trying so hard to get it under control.
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By Bahamut.Dasva 2011-03-12 17:35:16
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Also the problem with using graphite moderators also is losing coolant like say from water boiling or just expanding from heating up so less in same space or displacing some of it from scramming or a leak will mean more will get to the graphite to moderate increasing reactor power boiling more water round and round resulting in uncontrollable increase in power. However it works so well you can use less fuel and less enriched fuel easier.

On the other hand water moderators work the oposite since as density goes down moderation will go down reducing power so it balances out.

Also apparently graphite burns decent
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