Search found 1700 matches

by jaro
Nov 20, 2016 6:22 pm
Forum: Political, Industrial, Organizational Developments
Topic: "Thorium and our Nuclear Future" - UTK, 16-XI-2016
Replies: 5
Views: 3910

Re: "Thorium and our Nuclear Future" - UTK, 16-XI-2016

Substantive answers are always appreciated, thank you.
by jaro
Nov 20, 2016 5:27 pm
Forum: Political, Industrial, Organizational Developments
Topic: "Thorium and our Nuclear Future" - UTK, 16-XI-2016
Replies: 5
Views: 3910

"Thorium and our Nuclear Future" - UTK, 16-XI-2016

Ondrej Chvala's question, at the 46:15 mark of the video recording, asks whether Flibe Energy's two-fluid design is just a "resurrection" of the old MSBR design of ORNL, and if not, how is it different? Unfortunately, all he got in reply was more MSR history. Another thing I found poorly explained (...
by jaro
Oct 22, 2016 12:54 pm
Forum: China
Topic: China started "thorium based molten salt reactor" project
Replies: 164
Views: 79165

Re: China started "thorium based molten salt reactor" projec

Update from SINAP presentation at ORNL GAIN conference, Oct.2016
by jaro
Oct 11, 2016 11:49 am
Forum: Chloride Reactor Design
Topic: TerraPower's molten chloride fast reactor design
Replies: 108
Views: 30632

Re: TerraPower's molten chloride fast reactor design

Download Fiorina's PhD thesis & do a smoothed plot of its Fig 1.3 ..... Note that most of the neutrons though "fast" are well under 1 Mev. It's great PhD thesis. Already have a copy. I also note that it's about MSFR, not MCFR. Significant difference. Both in fuel loading and in F-vs-Cl inelastic sc...
by jaro
Oct 10, 2016 6:17 pm
Forum: Chloride Reactor Design
Topic: TerraPower's molten chloride fast reactor design
Replies: 108
Views: 30632

Re: TerraPower's molten chloride fast reactor design

It's hard to imagine that a HfN coating surrounding the core of any sort of high flux reactor would last very long - Hf's transmutation neutron cross sections are too high. The thicknesses of such coatings are typically very low (measured in Angstroms) so they are apt to be both totally & quickly "...
by jaro
Oct 10, 2016 2:47 pm
Forum: Chloride Reactor Design
Topic: TerraPower's molten chloride fast reactor design
Replies: 108
Views: 30632

Re: TerraPower's molten chloride fast reactor design

One thing chloride salts have going for them, at least in terms of chemical corrosion knowledge, is many years of experience with pyroprocessing research. In both the US and Korea (KAERI).
According to reports, a thin coat of HfN in melting pots protects the vessel walls.
by jaro
Oct 05, 2016 8:16 pm
Forum: Chloride Reactor Design
Topic: TerraPower's molten chloride fast reactor design
Replies: 108
Views: 30632

Re: TerraPower's molten chloride fast reactor design

Thanks Darryl.

These patent documents seem to be good at generalities, but not so good at design specifics.

Their intent seems to be to cover as wide a range of designs as possible.

Good luck trying to get any meaningful concepts out of them :lol:
by jaro
Oct 01, 2016 10:42 am
Forum: Thorium in the News
Topic: Machine Design article re: Th vs U reactors
Replies: 43
Views: 12436

Re: Machine Design article re: Th vs U reactors

Here's where the Plutonium is going.
Haven't heard about any impending changes in policy.
Apparently lawmakers don't read Machine Design.

https://www.facebook.com/SavannahRiverS ... 522727463/
by jaro
Sep 21, 2016 4:16 pm
Forum: Chloride Reactor Design
Topic: TerraPower's molten chloride fast reactor design
Replies: 108
Views: 30632

Re: TerraPower's molten chloride fast reactor design

I thought that the "T" in TZM stood for Tungsten.
Maybe a different TZM then ? Thnx
by jaro
Sep 17, 2016 6:53 pm
Forum: Reprocessing, Transmutation, Waste Storage
Topic: Stratification in Molten Salt
Replies: 10
Views: 4075

Re: Stratification in Molten Salt

Even without forced circulation, convective circulation will dominate.
And while that is gravity driven, it overwhelms differences in molecular weight.
In other words, everything gets entrained in that flow.
Only gas bubbles may be light enough to stay at the top.
by jaro
Sep 17, 2016 8:00 am
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33010

Re: Congratulations to David LeBlanc (ORNL)

I want to know more about this oscillation problem. Where should I look? The problem arises even with large, ordinary reactors, where the total amount of "lattice units" (fuel + moderator) is many times the minimum for criticality. But it is much less severe and readily managed, because the solid f...
by jaro
Sep 16, 2016 6:21 pm
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33010

Re: Congratulations to David LeBlanc (ORNL)

Explain, please. Thank you. Jaro, are you Canadian? Yes indeed. Canadian, just like DL. The problem with the "tube-in-tube" idea was a very high aspect ratio -- about 8 : 1 as I recall -- which is fine in elementary point reactor theory, but says nothing about the real world. In the real world, tha...
by jaro
Sep 16, 2016 3:46 pm
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33010

Re: Congratulations to David LeBlanc (ORNL)

I have been wondering about a purely LEU-fueled MSR for at least ten years now, but I must admit, I have not given it a great deal of thought until recently. That's excellent news. At long last, Flibe may be able to compete in the civilian sector, where LEU is a precondition. There is no shame in a...
by jaro
Aug 31, 2016 12:44 pm
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33010

Re: Congratulations to David LeBlanc (ORNL)

I make the claim that nuclear waste is radioactive for Centuries, not millenia, on the grounds that Pu and other transuranics are not waste, but fuel. What amount of Transuranics can it be allowed to contain before we can dump it into a cheap borehole? One reasonable "standard" might be natural ana...
by jaro
Jul 07, 2016 2:56 pm
Forum: Fluoride Reactor Design
Topic: Transatomic Power has published a technical white paper
Replies: 155
Views: 46190

Re: Transatomic Power has published a technical white paper

Yes, this is anew feature, at least in terms of previously published white papers.
TAP_movablemoderatorrods_Fig-5_July-2016.jpg
The change in fuel salt volume (relative to moderator) is also illustrated.
TAP_SVF_Fig-6_July-2016.jpg