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[Various] Japan Nuclear Emergency - Continuous Coverage of Damage and Radiation Risks - Page 42  

post #411 of 2836
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Quote:
Originally Posted by Tizmo View Post
Just something I thought about, since they are using sea water to try and cool down the reactors, what happens if small pieces of debris come in contact? Surely they are using filters etc, but what about very small particles?
Using sea water is going to wreck the reactors so they really aren't concerned about filtering the water anyway. From what I remember reading that reactor was due to be decommissioned soon anyway. At this point they are more concerned about cooling it down than retraining commercial functionality.

Quote:
Originally Posted by 4LC4PON3 View Post
Right but non of us or the Japan Society knows anything right now. For all we know they have no control over it & its about to meltdown or has already started. The video I posted above says people should clear back to about 20 miles if this thing goes.

Im praying that Japan does finaly get control over it if they dont already. only time will tell. I also read that Japan is not out of danger yet since Aftershocks can still happen for a couple of days after. its a crappy situation either way if it meltsdown or not. Lives lost, homes, Possible Meltdown causing diseases & deaths you name it it sucks
Quote:
Originally Posted by Tunapiano View Post
The core partially melted, i don't know why anyone watches CNN, they are all idiots.
Quote:
Originally Posted by 8-Ball View Post
From what I saw on CNN (which I RARELY watch), it's very slow paced, and they beat around the bush too much!

Tell us the damn facts!
Yeah at this point there's too much conflicting information to know what's happened.
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post #412 of 2836
Thanks for not making fun of me. i feel better now.
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post #413 of 2836
Quote:
Originally Posted by Krymore View Post
Why would you call them idiots? They report the news. Not some biased network like fox. They dont have an agenda. AC360 great show. CNN is broad cast all over the world. But hey what do I know.
because half the time CNN reports facts they made up or got from another network.
post #414 of 2836
wow they keep getting 6.1 quakes.
post #415 of 2836
wow this is terrible. this is the danger of nuclear power, no matter how safe the plant is, mother nature can wreck anything at any time.
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post #416 of 2836
well the plate they sit on moved 18 meters, with that much movement in a matter of minutes it's possible it could cause aftershocks for months to come
post #417 of 2836
Ex-Navy reactor operator here.

What has happened is a partial meltdown, similar to the TMI incident. The emergency cooling system, and assciated back-ups have mostly failed. Some pumps are running but not at adequate capacity. This causes the fuel plates to overheat and blister and for some of the uranium fuel to get into the cooling water. Water actually helps the fuel fission faster, so it is kind of compounds the problem when trying to cool the fuel plates. What they have done, as per meltdown procedure is inject boron-tetraflouride (fission poison) to the cooling water. This stuff absorbs thermal neutrons much faster than uranium. As long as they keep adding cooling water and poison, the reactor will eventually shut down and cool down. This could take a week or more. Once it does, they can make the necessary repairs.

As far as the radioactive iodine and cesium gases that were released, this is expected. As long as it is on a small scale, it won't cause problems for the local people. The venting of these gases is quite necessary. Reactors are very high pressure closed systems (think 1500-2000 PSI), designed to keep 500F water from boiling. It's really bad to get steam bubbles on the fuel plates, as they don't transfer heat as well as liquid water. Unfortunately with a bad rupture you obviously can't keep the pressure needed to keep steam forming so they have to vent the gas. They should only need to do this minimally as things will cool down.

Commercial accidents like this simply can't happen on Naval Reactors. Even a huge rupture can be contained, and if necessary the whole engine room can be flooded with seawater with firemain pumps, and is even designed to cool down with natural circulation if there are absolutely no pumps.
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post #418 of 2836
Quote:
Originally Posted by Tunapiano View Post
well the plate they sit on moved 18 meters, with that much movement in a matter of minutes it's possible it could cause aftershocks for months to come
It was 8 last time I heard!
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post #419 of 2836
Quote:
Originally Posted by Tunapiano View Post
well the plate they sit on moved 18 meters, with that much movement in a matter of minutes it's possible it could cause aftershocks for months to come
From what I have heard it moved 8 feet, about 2 metres...
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post #420 of 2836
Quote:
Originally Posted by mtbiker033 View Post
wow this is terrible. this is the danger of nuclear power, no matter how safe the plant is, mother nature can wreck anything at any time.
Wow.

Just like another user said, it only took a 8.9 Earthquake + a Tsunami for this to happen on a 40+ year old plant.
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