Search found 128 matches

by jon
Feb 25, 2019 5:36 am
Forum: United Kingdom
Topic: Sellafield power generation project (Moorside)
Replies: 28
Views: 3351

Re: Sellafield power generation project (Moorside)

'If the newer designs are uneconomical, older AGR should be continued with.' The fact that Britain failed to export any AGRs would suggest that nobody outside the country found them competitive. If the Brits had built PWRs instead - as the French did at the same time, after abandoning their own grap...
by jon
Oct 27, 2017 2:05 am
Forum: Political, Industrial, Organizational Developments
Topic: Toshiba and Westinghouse
Replies: 148
Views: 32816

Re: Toshiba and Westinghouse

The US has 281 lawyers per 100,000 people, France has 33, Japan 7. I would imagine the lawyer to engineer ratio in China is also pretty low. http://www.tentmaker.org/Quotes/lawyers-per-capita.html
by jon
Oct 19, 2017 2:00 am
Forum: Reactor Materials and Fluids
Topic: Relevant materials for the reactors
Replies: 11
Views: 5753

Re: Relevant materials for the reactors

Moltex claim the fast neutrons doing the fission will ignore the ~2% hafnium, while the thermalised ones will be absorbed before they get to the edge of the reactor vessel. They're talking about a thermal spectrum variant now though. Do they have many people working for them ?
by jon
Oct 18, 2017 6:39 am
Forum: Reactor Materials and Fluids
Topic: Relevant materials for the reactors
Replies: 11
Views: 5753

Re: Relevant materials for the reactors

Do you have any comment, Kirk, on the Moltex design of uranium chloride salts in solid fuel-style steel tubes ? They claim that some sacrificial zirconium in the mix will protect the insides of their fuel tubes (though not the outsides, which are in a fluoride secondary salt.)
by jon
Sep 13, 2017 2:46 am
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33006

Re: Congratulations to David LeBlanc (ORNL)

'Commercial enrichment facilities don't make enrichments greater than 5%. Governments make it from HEU.'
Speaking of which, did anything happen to the US government's U233 stocks ?
by jon
Sep 12, 2017 12:16 am
Forum: General Discussion
Topic: Ideas for reactor (questions)
Replies: 3
Views: 2257

Re: Ideas for reactor (questions)

If your core was liquid, and less dense than the moderator fluid, it wouldn't float in the middle, it would spread out in a layer from one side of the vessel to the other, and so contact the walls. This means you'd have to make the walls corrosion-proof anyway. This sketch actually brings to mind on...
by jon
Sep 10, 2017 4:19 am
Forum: Fluoride Reactor Design
Topic: Congratulations to David LeBlanc (ORNL)
Replies: 147
Views: 33006

Re: Congratulations to David LeBlanc (ORNL)

'What I am hearing from those that have evaluated their system is perhaps a 10% improvement in uranium utilization over today's PWRs, and likely inferior fuel performance relative to CANDUs.' They should get about a forty percent improvement in efficiency from hotter steam ( ~ 33% to 45% ), and, alt...
by jon
Sep 03, 2017 12:12 am
Forum: Political, Industrial, Organizational Developments
Topic: Toshiba and Westinghouse
Replies: 148
Views: 32816

Re: Toshiba and Westinghouse

Does anyone know whether competing reactors like the VVER, Hualong 1, APR 1400 or EPR 1600, use canned coolant pumps like the AP1000 ?
by jon
Jun 06, 2017 4:15 am
Forum: General Discussion
Topic: Balance of fuel and blanket salts
Replies: 10
Views: 3161

Re: Balance of fuel and blanket salts

'Another early project on power reactors was the development of a fast reactor fueled by molten plutonium and cooled by molten sodium....LAMPRE I (for Los Alamos molten plutonium reactor experiment I) was operated successfully for several thousand hours following initial criticality in early 1961. O...
by jon
May 25, 2017 9:39 pm
Forum: General Discussion
Topic: Balance of fuel and blanket salts
Replies: 10
Views: 3161

Re: Balance of fuel and blanket salts

I'll quote the ' I am a complete novice ' proviso, but it seems the production of new fuel and energy would only have to balance over the longer term, not necessarily even every month or every year. Perhaps you could vary the ratio by using more neutrons for fission when electricity demand is high, ...
by jon
May 23, 2017 3:16 am
Forum: Europe
Topic: Switzerland's Council of States decision
Replies: 7
Views: 11374

Re: Switzerland's Council of States decision

For a differing Swiss opinion on the phasing out of their nuclear power, which currently makes about 35% of their electricity, the ' Cold Showers with Doris ' website is pretty trenchant. ( Doris Leuthardt is the politician who has been shepherding the Swiss ' Energiewende ' through their parliament...
by jon
Feb 09, 2017 10:41 pm
Forum: Reactor Materials and Fluids
Topic: New alloys for MSRs
Replies: 4
Views: 2292

Re: New alloys for MSRs

'Does the silicon transmute to phosphorus and how would that affect the characteristics of this NiMo-SiC alloy?' Apparently not. The absorption spectrum of 28Si, which is 92% of natural silicon, is only 0.177, better than most metals, and similar to natural zirconium. 29Si and 30Si are stable isotop...
by jon
Feb 08, 2017 11:58 pm
Forum: General Discussion
Topic: Another way that MSRs could "save the world"
Replies: 122
Views: 28211

Re: Another way that MSRs could "save the world"

Regarding what Kurt Sellner was saying about the tone of your paper, ' killer apps ' probably sounds a bit bloodthirsty to sensitive souls as well. Haven't thought of a synonym yet, though. It also implies that you've got a solution looking for a problem to solve, rather than working from first prin...
by jon
Feb 08, 2017 4:35 am
Forum: Fluoride Reactor Design
Topic: ThorCon molten salt reactor executive summary published
Replies: 168
Views: 29266

Re: ThorCon molten salt reactor executive summary published

' It effectively turns your spent fuel into early-PWR fuel in small elements.' Sorry, EI, I don't follow you here. I know there was a proposal for burning once-through PWR fuel in Candus, but I thought if you got a high burn-up in a Gen III reactor there would be less fissile plutonium in the spent ...
by jon
Jan 26, 2017 10:14 pm
Forum: Energy Issues and Technologies
Topic: Granite EROEI
Replies: 23
Views: 6816

Re: Granite EROEI

This survey gives 56 ppm of thorium, plus or minus 6, and talks about uranium content too but without quantifying it. Interesting that the survey was ' communicated by M. King Hubbert ' - the prophet of the Peak Oil crowd.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC221093/