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Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

One other thing- since this is a water cooled reactor, study Three Miles Island, and it's failure, followed by the LOFT test that was done in at the INEL. (Loss of Fluid Test, Idaho National Engineering Lab, now called INL.... I spent a summer working right next to LOFT, which was way done by then AND the TMI reactor is still in archive in the Idaho Lab)

Basically, the "China Syndrome" would not happen- if all coolant was lost, the reactor not go super critcal, but once all fluid was lost, then the passage of ractants slows down, and the fission reaction stops. What I'm reading into the reaction isn't just a way to keep any chance of release to a minimum, but also to reduce the damage/cost due to the other damage.

Is there a risk of radioactive release- I think so, but is there a chance of "meltdown"- I don't think so.

http://bravenewclimate.com/2011/03/13/fukushima-simple-explanation/

Read this article. Fantastic explanation that should remove a lot of the fear mongering and misinformation out there about the nuclear aspect of this disaster.

Granted, this is a dynamic situation and conditions can easily change. But it sounds like the plants can suffer a complete meltdown and be "fine". They were designed to handle a complete meltdown with complete cooling failure. The controlled releases of steam and other gases (including hydrogen/oxygen) are a good thing. The explosions didn't appear to damage the "last resort" containment vessel.

Yup.... Japan = TMI = LOFT = no serious melt down, and a shutdown....
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

Feelin' sorry for yourself today? Feelin' screwed?

You're not screwed. These guys -- they're screwed.

4:10am

With economic losses expected to run into the hundreds of billions of dollars, and the human cost too large to count, a report from Reuters spells bad news for investors in Tepco, Asia's largest electric power utility company - and operator of the crisis-hit Fukushima nuclear plant.

Citing "a source familiar with the situation", Reuters says the insurance policies taken out on Japan's nuclear facilities don't cover damage caused by earthquakes or tsunami.
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

You're in one of the most earthquake and tsunami prone area in the world and you don't have insurance to protect against that??

???

they, like every other business, should know that insurance and risk mgmt are a waste of time.

fail, go to the gov'ment, get a bailout.

businessmen = smaht.
investors = suckers :p
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

oh god. Japanese news reporting it might be the containment vessel...
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

oh god. Japanese news reporting it might be the containment vessel...

I really don't think a hydrogen explosion is powerful enough to blow any of the contianment vessels.

Also, I sure hope everyone knows that there zero chance that any of reactors will go supercritical- there will NOT be an atomic bomb blast- that takes huge amount of work to do with very specific fuel.

The one major annoyance about the reactor coverage is that the risk to people if all 3 have a meltdown is nothing compared to the damage, injuries, and loss of life from the earthquake, and way moreso for the loss of life and damage from the tsunami. The reactor coverage is WAAAAAY out of wack compared to what happened on Friday.

We need to focus on the real losses, and the fact that millions who survived had no place to go, little food, little clean water, and no power. And that looks to not change for a LONG time.

The more we look at the reactor, the more we miss the big picture.
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

no, no, it would not be like an atomic blast. radiation leak. TEPCo is evacuating staff. some of the rods are now exposed.
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

explosion was in or near suppression pool (??) ...
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

I really don't think a hydrogen explosion is powerful enough to blow any of the contianment vessels.

I tend to agree. While hydrogen is highly flammable, it's nothing like an ammonium nitrate explosion where the expansion factor is orders of magnitude larger.

Plus those walls are reinforced concrete multiple feet thick. While not indestructible, it would take one hell of a blast to really do some damage. I would think...
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

I understand this stuff like, uh ancient Sumerian, or something. but this is not sounding good. this was not a hydrogen explosion.
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

CNN expert from MIT. he said the fuel in this reactor was different that the others - a uranium / plutonium mix they had bought from the Russian (old weapons grade)
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

Just because the fuel is different doesn't mean it can't generate hydrogen. At these pressures and temperatures, classical physics and chemistry isn't sufficient.
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

I found this : A suppression pool is another name for the reactor container vessel, the steel room surrounding the reactor core. Last line of defense from a radioactive leak.

apparently (once again this is Greek to me) - they stored spent fuel rods in this building?? and that is bad?
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

I found this : A suppression pool is another name for the reactor container vessel, the steel room surrounding the reactor core. Last line of defense from a radioactive leak.

apparently (once again this is Greek to me) - they stored spent fuel rods in this building?? and that is bad?

Depends on the isotope. Just as a "for instance", the US military uses depleted uranium in some of their artillery since it's so dense. Nowhere near the radioactivity of "traditional" uranium.
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

From what I'm hearing, it wasn't the last line of defense that was ruptured. It was the second (middle) line of defense.
 
Re: Japan hit by 8.9 Magnitude Quake, Tsunami Warnings In Effect

I found this : A suppression pool is another name for the reactor container vessel, the steel room surrounding the reactor core. Last line of defense from a radioactive leak.

apparently (once again this is Greek to me) - they stored spent fuel rods in this building?? and that is bad?

The suppression pool is a pool of water beneath the primary reactor vessel. If they have to isolate the reactor, they close main steam isolation valves and divert the steam into the suppression pool to condense the steam (since the trubine and condenser are in a different building). Also, should the primary containment fail, the fuel charge would drop into the pool and cool there. At least on the reactors I worked on, that was the design.
 
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