Talk:Gas-cooled fast reactor

Old comments
Aren't all these demonstration reactors with thermal neutrons? pstudier 03:19, 22 October 2005 (UTC)

By "demonstration reactors", do you mean the Generation IV reactor designs? Only two of the six Gen. IV designs are thermal reactors, the Supercritical Water Reactor (SCWR, which actually can be either a fast,thermal, or hybrid of the two), and the Very High Temperature Reactor (VHTR). I guess the Molten Salt Reactor (MSR) is classified as an epithermal reactor, which is not quite thermal, but close. The other three are fast reactors.

http://nuclear.inl.gov/gen4/ Ajnosek 20:50, 5 January 2006 (UTC)


 * I mean that all the reactors mentioned in Research History are thermal designs. To the best of my knowledge, no Gas Cooled Fast Reactor has ever been built. pstudier 22:50, 6 January 2006 (UTC)


 * I think that all the demonstration reactors that are mentioned in the article are thermal. The only breeder reactors that I know of used liquid metals for coolants. Still, most of the technology for a GFR would be identicle to that of a thermal gas cooled reactor, which is what I think the origianl author of that section meant (i.e. passive safety systems, blowers, triso fuel compacts, etc..).  The major difference would be that there would be less moderation and more fertile fuel for breeding.  Lcolson 01:40, 7 January 2006 (UTC)


 * AFAIK no GFR has yet been built. It is a proposed design, and one of the two possible designs for example for the French CEA's generation IV prototype, which the French President recently announced will be operating by 2020. The other possible design is a sodium-cooled LMFBR, which would build on their experience with Phenix and Superphenix. Andrewa 02:59, 26 January 2006 (UTC)

Liquid nitrogen
The article mentions liquid nitrogen as a possible coolant. However I can't find nitrogen mentioned in any of the sources. Sources aside, I don't see how liquid nitrogen can be considered a gas. Lastly, considering the normal working temperatures of nuclear reactors, a cryogenic coolant seems unlikely. ·:· Will Beback ·:· 21:43, 4 September 2008 (UTC)
 * Further, nitrogen at high temperatures becomes reactive, and I doubt that it would be a suitable gas since the others mentioed are inert or semi-inert. I'm just going to remove it. Anyone is welcome to restore it if they have a source. ·:· Will Beback  ·:· 21:42, 5 September 2008 (UTC)

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