Energy From Thorium Discussion Forum

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 Post subject: thorium and MSR
PostPosted: Nov 05, 2011 8:57 pm 
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Joined: Apr 03, 2011 7:50 pm
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Location: Rhinebeck, NY
"Nuclear power is our gateway to a prosperous future"
http://www.thehindu.com/opinion/op-ed/a ... 601471.ece

Lots of good info on thorium and even a brief mention of MSR.
Glad someone understands. Go India!


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 Post subject: Re: thorium and MSR
PostPosted: Dec 07, 2011 12:40 am 
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Joined: Apr 19, 2008 1:06 am
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In the enthusiasm for thorium, it is often omitted to state that thorium needs fissile feed to start off the fission in thorium's downstream products. Thorium can, therefore, be used either in combination with or as a follow up nuclear fuel to uranium..
Indians have been going for fast reactors to produce U-233 for use with thorium. The thesis of using thorium to extend nuclear energy with combined use including thorium is still on paper.
Two additional lines of development are required:-
1. Fast Spectrum Molten Chloride Reactors with addition of thorium as additional fertile fuel.
2. Use of 20% LEU with metallic thorium to create U-233. U-233 could be used in thorium fueled reactors either thermal or fast reactors.


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 Post subject: Re: thorium and MSR
PostPosted: Dec 11, 2011 9:14 am 
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Joined: Sep 10, 2008 7:40 pm
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I'm reminded of the first proposal to convert Th to U-233 -- "The Plutonium 240 Scare" in Weinberg's book. In early 1944 the US had made Pu-239 for a weapon, but it was too contaminated with Pu-240 for a gun-type device; the spontaneous fission of Pu-240 would set it off prematurely, before it could be compacted enough. Wigner proposed using it in a converter reactor to make U-233 from Th-232; I suppose that's why the US has the excess thorium buried in the desert. But Oppenheimer's team build the spherical implosion gadget that solved the Pu-240 problem so the converter was not built.


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 Post subject: Re: thorium and MSR
PostPosted: Dec 12, 2011 11:58 pm 
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Joined: Apr 19, 2008 1:06 am
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The weapons use of nuclear energy has already been overdone. Even the northern stub of Korea is testing them. It is time to use up Depleted Uranium and used Nuclear Fuel to produce the power. Half the world, a majority of people living in Asia and Africa, are without electricity.
Apply NPT to nuclear powers and weapons. Rest of the world needs even Plutonium to burn U238 and perhaps thorium for power. Why ban or hinder recycling?
An MSR version of the IFR comes to mind as the solution. The Th-20%LEU, inspired by AHWR300-LEU, is only one of the ways to get there.


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 Post subject: Re: thorium and MSR
PostPosted: Mar 17, 2012 10:25 pm 
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Joined: Jan 16, 2012 7:15 am
Posts: 93
Good catch, Ed

I caught the hint from Gordon McDowell's video on the Kickstarter site. "The Good Reactor" is another video effort going on. See http://www.thoriumdocumentary.com/blog/

A former President of India's "endorsement", no less.


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