Search found 487 matches

by alexterrell
Jul 02, 2018 3:05 am
Forum: General Discussion
Topic: How fast could nuclear energy actually expand?
Replies: 58
Views: 8912

Re: How fast could nuclear energy actually expand?

There are no concrete plans for converting Thorium. There are plans for consuming plutonium, perhaps the best known being the PRISM reactor. GE-Hitachi are promoting this and are involved with the UK Government in evaluating options for plutonium disposal at Sellafield. Of course, these discussions ...
by alexterrell
Jul 02, 2018 2:58 am
Forum: Political, Industrial, Organizational Developments
Topic: Toshiba and Westinghouse
Replies: 148
Views: 32816

Re: Toshiba and Westinghouse

Gutierrez said that during its bankruptcy, Westinghouse - which sells services, fuel and spare parts to almost 80 percent of world’s 450 reactors - had not lost a single contract. Gutierrez had no news on Toshiba’s attempts to sell its NuGen unit, which has a project to build reactors in Britain. W...
by alexterrell
May 10, 2018 7:46 am
Forum: Liquid-Metal-Cooled Reactors
Topic: KiloPower/KRUSTY
Replies: 5
Views: 2233

Re: KiloPower/KRUSTY

Would NaK heat pipes be a means of passively cooling reactors in the event of a shut-down?
by alexterrell
May 10, 2018 7:44 am
Forum: United Kingdom
Topic: Hitachi to build ABWRs in the UK
Replies: 102
Views: 21403

Re: Hitachi to build ABWs in the UK

A direct stake is an anathema to the Thatcherite ideology of the current government. It will be a ludicrous Hinkley Point type deal or nothing. I don't think the current Government has any Thatcherite ideology. In fact, it has no ideology other than Brexit. I suspect a direct stake, showing a decen...
by alexterrell
Apr 21, 2018 12:03 pm
Forum: Energy Issues and Technologies
Topic: Nuclear Ship Propulsion
Replies: 139
Views: 17107

Re: Nuclear Ship Propulsion

A global deal to slash CO2 emissions from shipping may be a very good reason to change to nuclear ship propulsion: Deal struck to slash climate emissions from global shipping The agreement by more than 170 countries, which comes at the end of two weeks of talks at the UN’s International Maritime Or...
by alexterrell
Sep 23, 2017 2:27 am
Forum: United Kingdom
Topic: Does Hornsea 2 spell the end of nuclear in the UK?
Replies: 7
Views: 3002

Re: Does Hornsea 2 spell the end of nuclear in the UK?

The interesting question who who steps in Moorside, and will they try and build the AP1000 or a different design. The Chinese builder of AP1000s (SNPTC?) is apparently interested in taking a stake, and they know how to build AP1000s. They could perhaps do it for £70/MWh. Or, KEPCO come in with their...
by alexterrell
Sep 15, 2017 3:52 am
Forum: United Kingdom
Topic: Does Hornsea 2 spell the end of nuclear in the UK?
Replies: 7
Views: 3002

Does Hornsea 2 spell the end of nuclear in the UK?

Earlier this week, the Government announced that Hornsea 2 would be given a strike price of £57.50 for their 1.38GW offshore wind park, for 2022. (One caveat never mentioned is that Dong is under no obligation to build - if component prices don't fall as they expect, they may not build - though woul...
by alexterrell
Aug 02, 2017 8:21 am
Forum: Water-Cooled Reactors
Topic: High Pressure BWR
Replies: 54
Views: 12813

Re: High Pressure BWR

Resistance to aircraft strikes is the important factor. Varies from 44MPa/(m^0.5) to 100+ The AP1000 Shield building cylindrical section is only 36" thick and is supposed to protect the steel vessel from aircraft impacts. Althoguh the steel content has apparently been redacted. I think the Hualong ...
by alexterrell
Aug 02, 2017 3:15 am
Forum: Political, Industrial, Organizational Developments
Topic: Russia dominates exports. What hope for the West?
Replies: 18
Views: 5443

Re: Russia dominates exports. What hope for the West?

Apart from the UK, which countries which are looking for new reactors won't buy from Russia? Probably USA and Canada - as much to boost their own nuclear industry as for political reasons. Poland. But Hungary doesn't seem to mind. Poland is an interesting case - though I'm not sure what the current ...
by alexterrell
Aug 01, 2017 3:01 pm
Forum: Power Conversion Systems
Topic: Direct contact condensers
Replies: 44
Views: 14671

Re: Direct contact condensers

I thought I read they have a 6-7C delta T planned in? Wouldn't we have more than a 1C rise in the condenser? The big cost area in the new nuclear plants is tunnelling about 2km out - Hinkley C has two inlet tunnels and one outlet tunnels, each 7m in diameter and totalling 11km in length. Given they'...
by alexterrell
Aug 01, 2017 2:20 pm
Forum: Political, Industrial, Organizational Developments
Topic: Russia dominates exports. What hope for the West?
Replies: 18
Views: 5443

Russia dominates exports. What hope for the West?

Russia unrivaled in nuclear power plant exports Interesting that Russia is dominating the nuclear reactor market, with China poised to be its competitor. What about the West? This is attributed at least in part to disasters that struck two major competitors: Westinghouse Electric Co. of the United ...
by alexterrell
Jul 04, 2017 1:47 pm
Forum: United Kingdom
Topic: Hinkley Point UK controversy
Replies: 72
Views: 19540

Re: Hinkley Point UK controversy

Disappointing to see the Hinkley price go up. On the other hand, in dollar terms it's unchanged, which begs the question, how much of the rise is down to the devaluation of the pound? $8,000/KW should be the high point for reactor technologies. Atkins evaluated the Moltex design at a conservative $2...
by alexterrell
May 20, 2017 1:53 pm
Forum: Salt-Cooled Reactors
Topic: Natural Uranium fast MSR, would a big one work ?
Replies: 8
Views: 3775

Re: Natural Uranium fast MSR, would a big one work ?

The difference between fast and thermal spectrum is the ratio of the fission cross section of 235U over absorption cross section of 238U. This ratio is around 10 for high energy neutrons and around 250 for thermal neutrons. In natural uranium you have around one 235U atom for 140 238U atoms. That i...
by alexterrell
May 20, 2017 1:51 pm
Forum: Salt-Cooled Reactors
Topic: Natural Uranium fast MSR, would a big one work ?
Replies: 8
Views: 3775

Re: Natural Uranium fast MSR, would a big one work ?

How about a thought experiment. If we had a 1Km radius vat of natural uranium+salt coolant. Neutron losses would be essentially irrelevant even for fast neutrons due to the ultra long distances neutrons would have to travel before they're lost. Nearly every neutron would either find a fissile or fe...
by alexterrell
Mar 09, 2017 11:06 am
Forum: Water-Cooled Reactors
Topic: Lightbridge metal fuel
Replies: 11
Views: 4159

Re: Lightbridge metal fuel

The Lightbridge fuel is on a 24 month cycle versus an 18 month cycle for each fuel shuffling. So if the fuel assemblies are in for 4 shuffling cycles, that would give the Lightbridge fuel an extra 2 years of irradiation compared to standard fuel assemblies and thus a higher burn-up. At least, that ...