Search found 78 matches

by TerjeP
Sep 17, 2017 2:37 am
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33021

Re: Congratulations to David LeBlanc (ORNL)

Kirk - I must admit that you have taken some of the gloss off the IMSR design. I am now plagued by questions about their fuel cycle. :-(
by TerjeP
Sep 17, 2017 2:34 am
Forum: General Discussion
Topic: Atomic Australia
Replies: 0
Views: 2562

Atomic Australia

I just wanted to mention the following Facebook Group for Aussies interested in nuclear technology. Non Australians may join also but obviously the name of the group is designed to tilt the conversation a certain way. https://www.facebook.com/groups/Atomic.Australia/ I hope the admins don't mind me ...
by TerjeP
Sep 12, 2017 7:36 pm
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33021

Re: Congratulations to David LeBlanc (ORNL)

Enrichment of reload fuel at equilibrium 2-3% for start-up, 5-19% makeup fuel Taken from the table on page 14 of the following document. https://aris.iaea.org/PDF/IMSR400.pdf My take on this is that over time the added fuel needs to be at a higher enrichment level to ensure that the reactor can rem...
by TerjeP
Sep 10, 2017 2:15 am
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33021

Re: Congratulations to David LeBlanc (ORNL)

That may be what they are promising, but they're heading for a Transatomic-class embarrassment in that case.
It very clearly is what they have promised. Not in a binding promise but in all their promotional activity. You seem to be suggesting they are stupid or dishonest.
by TerjeP
Sep 06, 2017 5:01 pm
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33021

Re: Congratulations to David LeBlanc (ORNL)

Arguably the advantage of the IMSR is speed to market. Though obviously that is speculative at this point in time. Ultimately it depends how many technical and regulatory hurdles there are to overcome and which of the two design teams can most quickly overcome the hurdles applicable to their design....
by TerjeP
Sep 03, 2017 7:24 pm
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33021

Re: Congratulations to David LeBlanc (ORNL)

I just read this whole discussion again from the beginning. One point that I don't think got drawn out enough is that as soon as one MSR gets licensed and becomes operational the regulatory and investment path for other designs ought to get simpler. Simply because more players will have experience a...
by TerjeP
Oct 16, 2016 4:17 pm
Forum: General Discussion
Topic: MSRE video from 1969
Replies: 6
Views: 4774

Re: MSRE video from 1969

Another feature of the MSRE is its high-speed digital computer. The computer does not exercise direct control over the reactor, but collects and displays data, and performs online calculations for immediate and long-range purposes.
I wonder if this data was lost or if it is documented somewhere?
by TerjeP
Oct 16, 2016 4:16 am
Forum: General Discussion
Topic: MSRE video from 1969
Replies: 6
Views: 4774

MSRE video from 1969

This is recently published footage from 1969. A high quality overview of the MSR experiment.

The Molten-Salt Reactor Experiment

An amazing find.
by TerjeP
Sep 20, 2016 10:39 pm
Forum: Reprocessing, Transmutation, Waste Storage
Topic: Stratification in Molten Salt
Replies: 10
Views: 4075

Re: Stratification in Molten Salt

Just for the record the surface gravity on Neptune is only a little higher than on earth at 11.15 m/s^2. This is in spite of the fact that the mass is 17 times the earths. People often think that large planets are going to have a proportionally larger surface level gravity but it is not the case. Ev...
by TerjeP
Sep 20, 2016 12:59 am
Forum: Reprocessing, Transmutation, Waste Storage
Topic: Stratification in Molten Salt
Replies: 10
Views: 4075

Re: Stratification in Molten Salt

I'm thinking about isotopic separation. And yes it's a thought experiment.
by TerjeP
Sep 19, 2016 9:57 pm
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33021

Re: Congratulations to David LeBlanc (ORNL)

The following document from 1980 has some interesting information on the DMSR design and make up fuel. In particular table 17 on page 31. It shows that the fuel is originally LEU at 20% U235. In years 1, 2 and 3 all that is added is U238 to ensure that the fuel mix does not become too fissile (ie de...
by TerjeP
Sep 19, 2016 9:42 pm
Forum: Reprocessing, Transmutation, Waste Storage
Topic: Stratification in Molten Salt
Replies: 10
Views: 4075

Re: Stratification in Molten Salt

You seem to be leaping ahead to some assumed reactor design. I just said it was a vat. And I'm starting with the assumption that there is not any notable fission happening. I was interested in understanding if stratification occurs before contemplating how it might help or hinder a particular design...
by TerjeP
Sep 17, 2016 6:55 pm
Forum: Reprocessing, Transmutation, Waste Storage
Topic: Stratification in Molten Salt
Replies: 10
Views: 4075

Re: Stratification in Molten Salt

What if the heat source is at the top so convection is minimal?
by TerjeP
Sep 17, 2016 5:57 pm
Forum: Reprocessing, Transmutation, Waste Storage
Topic: Stratification in Molten Salt
Replies: 10
Views: 4075

Stratification in Molten Salt

I'm hoping somebody can help me understand something. Assuming I have a vat of hot molten salt and that in this salt there are compounds of Pu239, U238, U235, U233, Thorium and various fission products. My simplistic thinking is that the compounds with the heavier atoms should tend to be near the bo...
by TerjeP
Sep 17, 2016 12:12 am
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33021

Re: Congratulations to David LeBlanc (ORNL)

What I'm saying is that I strongly suspect an LEU-fueled MSR can't outperform a CANDU, or maybe even an LWR. If that is true then it suggests Terrestrial Energy have seriously miscalculated. They claim it will use 1/6 the fuel of a LWR. But even if they used the same amount of fuel as a LWR they wo...