Search found 2719 matches

by Lars
Nov 02, 2015 11:13 am
Forum: Chloride Reactor Design
Topic: TerraPower's molten chloride fast reactor design
Replies: 108
Views: 30634

Re: TerraPower's molten chloride fast reactor design

The main justification he mentioned for salt in tubes was no need for any moving parts (the impeller) in the fuel salt. The latest pictures also show no impellers in the coolant salt. I think these will be included to maximise reactor power but are not needed for reactor functioning. He also mentio...
by Lars
Sep 23, 2015 5:56 pm
Forum: Safety, Security, Proliferation
Topic: Tritium risks
Replies: 27
Views: 8233

Re: Tritium risks

Tritium production from BWR's are particularly low 10x lower than PWRs which in turn are much lower than CANDUs. Molten salt reactors with beryllium are about half of CANDUs and with lithium and beryllium about the same. Storage of tritium is normally done as a hydride. For a 1GWe power plant you ne...
by Lars
Sep 10, 2015 10:43 am
Forum: General Discussion
Topic: MSR staff numbers
Replies: 20
Views: 5035

Re: MSR staff numbers

The control room for an AP1000 is slated to have one operator and one supervisor. In the US, modified regs for SMRs are being recommended to allow one control room for multiple units. Unfortunately, the specific recommendations are not available to the general public unless you are willing to pay $1...
by Lars
Sep 10, 2015 2:00 am
Forum: United States
Topic: Nuclear Developments in California
Replies: 102
Views: 30653

Re: Could LFTRs save California?

Can LFTR Save California? One problem we have today is Reactors cannot "Follow The Load". We have a local PWR running here in Minnesota "Prairie Island" and it runs at a constant output. We start and stop coal and natural gas to "Follow The Load". If California had a few more conventional Reactors ...
by Lars
Aug 15, 2015 11:25 am
Forum: Japan
Topic: Japan returns to nuclear power
Replies: 16
Views: 7309

Re: Japan returns to nuclear power

by Lars
Jun 24, 2015 4:12 pm
Forum: Reactor Materials and Fluids
Topic: Strontium-90 for Zirconium supply?
Replies: 10
Views: 4077

Re: Strontium-90 for Zirconium supply?

Too small a supply to be worth fussing over.
by Lars
Jun 20, 2015 9:32 am
Forum: United States
Topic: Nuclear Developments in California
Replies: 102
Views: 30653

Re: Could LFTRs save California?

Nuclear might get some unintended positive press/public support from the drought: If the plant is used to produce clean water for the parched local community, it "should" get some positive support. How could even the most ardent left wing Berkeley environmentalist complain about this gift of clean ...
by Lars
Jun 20, 2015 9:16 am
Forum: Fluoride Reactor Design
Topic: MOSEL reactor concept – is it the “best” LFTR?
Replies: 61
Views: 23313

Re: MOSEL reactor concept – is it the “best” LFTR?

I'm not so sure it's IP fear, I think a large part of it that many of these strategies are simply orthogonal to one another. Terrestrial wants to build the simplest MSR they can with the least development. That's fine, but it misses many of the potential advantages of MSR, in my opinion, not the le...
by Lars
May 02, 2015 6:25 pm
Forum: Water-Cooled Reactors
Topic: Status on the ESBWR licensing
Replies: 39
Views: 16628

Re: Status on the ESBWR licensing

A core damage quote of 1e-6 or 1e-8 really isn't any different since at this level the important issues are the ones that were not included. I rather doubt that the accident sequences that lead to TMI, Chernobyl, or Fukushima were on anybodies fault tree evaluation of core damage frequency.
by Lars
May 02, 2015 6:22 pm
Forum: Fluoride Reactor Design
Topic: Salt Fouling from Corrosion Products
Replies: 4
Views: 3576

Re: Salt Fouling from Corrosion Products

You should search the ORNL docs - I've heard they did clean molten salt tests with 316 and the results were very good. But oxygen is precluded from most MSR designs and is considered a significant problem - so I wouldn't put any importance to open air results.
by Lars
Mar 22, 2015 6:00 pm
Forum: United Kingdom
Topic: Hinkley Point UK controversy
Replies: 72
Views: 19540

Re: Hinkley Point UK controversy

http://theenergycollective.com/willem-post/338781/high-renewable-energy-costs-damage-germanys-economy The Danes are using tax money to fund their wind program. Why is Germany not taking Denmark to court over this? I think the English, Czechs, etc. should whisper to the Danes that perhaps Denmark sh...
by Lars
Mar 22, 2015 5:56 pm
Forum: Reactor Materials and Fluids
Topic: Effects of Transmutation on Corrosion Chemistry
Replies: 18
Views: 5681

Re: Effects of Transmutation on Corrosion Chemistry

One reason not to include a water wash at the NPP site is that we really need the core to be extremely dry. So after the water wash one will have to go to some extremes to be sure to remove the water and any oxygen. I think this is best left for the recycling site. How about ammonia? http://en.wiki...
by Lars
Mar 21, 2015 11:53 am
Forum: Reactor Materials and Fluids
Topic: Effects of Transmutation on Corrosion Chemistry
Replies: 18
Views: 5681

Re: Effects of Transmutation on Corrosion Chemistry

The noble metals will deposit on all surfaces and it is possible that we will want to clean them out periodically. A few possible reasons: 1) If they build up at just the cold end of the heat exchanger then maybe this causes concerns about clogging. Especially, if the plate out is clumpy and might b...
by Lars
Mar 21, 2015 11:40 am
Forum: Reactor Materials and Fluids
Topic: Effects of Transmutation on Corrosion Chemistry
Replies: 18
Views: 5681

Re: Effects of Transmutation on Corrosion Chemistry

One reason not to include a water wash at the NPP site is that we really need the core to be extremely dry. So after the water wash one will have to go to some extremes to be sure to remove the water and any oxygen. I think this is best left for the recycling site.
by Lars
Mar 19, 2015 3:10 pm
Forum: Reactor Materials and Fluids
Topic: Effects of Transmutation on Corrosion Chemistry
Replies: 18
Views: 5681

Re: Effects of Transmutation on Corrosion Chemistry

The salt does not wet the graphite. Before washing with water typically a load of flush salt is used to "dilute" the residual salt. For example, suppose there were 14 liters of salt that remained after draining (whether due to sticking to the surface or local low spots that do not drain) in a reacto...