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[ZEROHEDGE] TEPCO Official Admits Fukushima "Out Of Control" - Page 13

post #121 of 187
We need fast reactors to deplete our stocks of uranium biggrin.gif

As far as I know, only Europe has fast reactors.
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post #122 of 187
Quote:
Originally Posted by Tsumi View Post

We need fast reactors to deplete our stocks of uranium biggrin.gif

As far as I know, only Europe has fast reactors.
You can make it run as fast as you want with 3 possible splits per split with the controll rods removed (not the slow down rods)
post #123 of 187
Quote:
Originally Posted by maarten12100 View Post

You can make it run as fast as you want with 3 possible splits per split with the controll rods removed (not the slow down rods)

Little technical lesson:

"Fast" reactors do not have a moderator. Simply removing the control rods will not make it a fast reactor, the moderator (in most cases, water) will need to be removed as well, and in most cases be replaced with some sort of liquid metal, commonly liquid sodium. It's a whole different technical design from the common "slow" reactor.
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post #124 of 187
Quote:
Originally Posted by Tsumi View Post

Little technical lesson:

"Fast" reactors do not have a moderator. Simply removing the control rods will not make it a fast reactor, the moderator (in most cases, water) will need to be removed as well, and in most cases be replaced with some sort of liquid metal, commonly liquid sodium. It's a whole different technical design from the common "slow" reactor.
I study physics at the university but it has been a while that I had this material actually nothing about a fast reactor the fastest reactor I could figure was one without control rods (which is pretty much suicide)
The moderator is what slows the protons down so you can have more effective collisions right?

Too long ago and my brain is in a mess rolleyes.gif
post #125 of 187
Quote:
Originally Posted by maarten12100 View Post

I study physics at the university but it has been a while that I had this material actually nothing about a fast reactor the fastest reactor I could figure was one without control rods (which is pretty much suicide)
The moderator is what slows the protons down so you can have more effective collisions right?

Too long ago and my brain is in a mess rolleyes.gif

I think the moderator is to slow the released fast neutrons down so they have a more of a chance of combining with a Uranium atom , making it unstable and splitting
Edited by TwirlyWhirly555 - 9/19/13 at 11:43am
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post #126 of 187
Quote:
Originally Posted by TwirlyWhirly555 View Post

I think the moderator is to slow the released fast neutrons down so they have a chance of combining with a Uranium atom , making it unstable and splitting
you're right as I was saying it has been too long for me.
post #127 of 187
Quote:
Originally Posted by maarten12100 View Post

I study physics at the university but it has been a while that I had this material actually nothing about a fast reactor the fastest reactor I could figure was one without control rods (which is pretty much suicide)
The moderator is what slows the protons down so you can have more effective collisions right?

Too long ago and my brain is in a mess rolleyes.gif

You're halfway there. First off, it's neutrons, not protons.

Secondly, the moderator is there to slow down the neutrons so that it can collide with U-235 and split it. Fast neutrons will simply bypass U-235. At the same time this is all happening, however, U-238 (the most abundant type of uranium) is absorbing the neutrons and eventually turn into plutonium. Plutonium cannot be split by slow neutrons, and that's where fast reactors come in. The fast neutrons are capable of inducing nuclear fission in plutonium, and at much higher temperatures with much higher energy output. That's why liquid metal is usually used as coolant, besides the obvious removal of the moderator.

The primary argument against fast reactors is that these reactors are also called breeder reactors, in which more fuel is often taken out than put in. Since the primary fuel is plutonium, which is mixed in with U-238, the U-238 is turned into plutonium during the reactions, hence, more fuel being taken out than being put in. And plutonium is one of the primary materials used in nuclear bombs.
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post #128 of 187
Quote:
Originally Posted by Tsumi View Post

You're halfway there. First off, it's neutrons, not protons.

Secondly, the moderator is there to slow down the neutrons so that it can collide with U-235 and split it. Fast neutrons will simply bypass U-235. At the same time this is all happening, however, U-238 (the most abundant type of uranium) is absorbing the neutrons and eventually turn into plutonium. Plutonium cannot be split by slow neutrons, and that's where fast reactors come in. The fast neutrons are capable of inducing nuclear fission in plutonium, and at much higher temperatures with much higher energy output. That's why liquid metal is usually used as coolant, besides the obvious removal of the moderator.

The primary argument against fast reactors is that these reactors are also called breeder reactors, in which more fuel is often taken out than put in. Since the primary fuel is plutonium, which is mixed in with U-238, the U-238 is turned into plutonium during the reactions, hence, more fuel being taken out than being put in. And plutonium is one of the primary materials used in nuclear bombs.
I looked it up it seems like a much better way makes me wonder why we never got this kind of reactor back when I was in High school.
post #129 of 187
Quote:
Originally Posted by maarten12100 View Post

I looked it up it seems like a much better way makes me wonder why we never got this kind of reactor back when I was in High school.

Well, as I said in my post, "activists" were concerned about increasing stockpiles of plutonium rolleyes.gif
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post #130 of 187
Quote:
Originally Posted by xentrox View Post

OH NO! We're all gonna die!

Of course we are. We all were going to die before this happened. We all are going to die even if we stop using all fossil and nuclear fuels, sit in a tree, kick off our shoes, and learn to play the flute.

The planet has been here for billions of years before us, and it will be here billions of years after us. We can launch every nuclear weapon we have and the planet will be just fine ... different, but fine. WE will be dead though, but then again, see my previous comment.

The only real question is, are we willing to kill off about 4-5 billion people and go back to an agricultural society across the world so that those who are left can live another 30 seconds, or would we rather have more people with a better and longer life?

The planet is fine, humans will survive, and so will the animals and planet. Some will die off, but then again there are more extinct species on earth than there are non-extinct ones.
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