Search found 973 matches

by BritDownUnder
Fri Jun 11, 2021 7:45 pm
Forum: Nuclear Power
Topic: Samsung Heavy partners with the Korea Atomic Energy Research Institute to develop nuclear-powered ships
Replies: 3
Views: 72

Re: Samsung Heavy partners with the Korea Atomic Energy Research Institute to develop nuclear-powered ships

I don’t think it is true that a nuclear reactor can explode like a nuclear weapon. The criticality of a piece of uranium is dependent upon the fraction of fissile uranium U-235 as opposed to non-fissile U-238. As far as I know natural uranium as mined is only 0.7% U-235 and you need about 70% U-235 ...
by BritDownUnder
Thu Jun 10, 2021 11:07 am
Forum: General Discussion
Topic: New coronavirus in/from China
Replies: 8506
Views: 265433

Re: New coronavirus in/from China

I heard a very interesting press conference on the ABC when I was out in the garden recently. A very knowledgeable woman was speaking about the "virus attack rate". I had to look up this term but she said that the UK (Alpha) variant attack rate was 8% and the new delta and kappa attack rat...
by BritDownUnder
Thu Jun 10, 2021 11:01 am
Forum: Preparations
Topic: Preparing for extreme heatwaves.
Replies: 98
Views: 19464

Re: Preparing for extreme heatwaves.

There have been reports of snow in some elevated parts of New South Wales. I did not see any and my impression was that there was some 'cold' in the wind but if I was wearing a coat outside which I have not done for several years now it would be perfectly tolerable. With regards to hot weather Adams...
by BritDownUnder
Tue Jun 08, 2021 9:53 am
Forum: Nuclear Power
Topic: edf-decides-move-dungeness-b-defuelling-phase
Replies: 6
Views: 186

Re: edf-decides-move-dungeness-b-defuelling-phase

I am a bit surprised it took 16 years to build. However it did generate a lot of power during its service life and contributed to the economy and probably UK balance of payments. Maybe a pity the issues with AGRs were not ironed out and they were not continued with unless there were major design fla...
by BritDownUnder
Mon Jun 07, 2021 11:17 pm
Forum: Preparations
Topic: Propane shortage ?
Replies: 22
Views: 962

Re: Propane shortage ?

That must have been a hell of a barbecue to blow a 60 Amp fuse.
Not noticed propane gas prices in Australia but the small butane cylinders (230grams) my wife uses seem to always increase in price.
by BritDownUnder
Mon Jun 07, 2021 1:24 pm
Forum: Biofuels & Biomass
Topic: CCS for waste wood gasification plant
Replies: 17
Views: 438

Re: CCS for waste wood gasification plant

You're right. https://www.gardenmyths.com/plants-produce-oxygen-from-carbon-dioxide/ I'm learning about plants today. I have to correct myself on this one. The oxygen produced by plants does indeed come from water. But it looks like plants then use some of the hydrogen (in chemical terms they are p...
by BritDownUnder
Mon Jun 07, 2021 4:12 am
Forum: Permaculture
Topic: A Good Year in the Garden
Replies: 16
Views: 1273

Re: A Good Year in the Garden

A frost today in the garden. Not a bad one but a frost nonetheless. I don't think there was one last year.
Minimum air temperature in the greenhouse was +3.6C - maximum is still over 30. I put some spinach and potatoes in on Saturday and a cat pooped on the freshly dug potato bed. Thanks.
by BritDownUnder
Sun Jun 06, 2021 12:01 am
Forum: Biofuels & Biomass
Topic: CCS for waste wood gasification plant
Replies: 17
Views: 438

Re: CCS for waste wood gasification plant

If I am not mistaken and I invite people to prove me wrong but plants never actually separate the oxygen from the carbon when they take in CO2 from the air. Instead they take in both water (H2O) and carbon dioxide (CO2) note here that both molecules contain oxygen. Plants then split water into hydro...
by BritDownUnder
Fri Jun 04, 2021 10:17 pm
Forum: News
Topic: NdPr Oxide Refinery
Replies: 4
Views: 412

Re: NdPr Oxide Refinery

I think Australia should also be doing this with their rare earths instead of exporting the ores for further processing. Anyway good news for the unemployed Chemists of the North-East. I hear that some of the waste products (Thorium I think) of the extraction process are radioactive. I hear that Afg...
by BritDownUnder
Fri Jun 04, 2021 10:12 pm
Forum: Biofuels & Biomass
Topic: CCS for waste wood gasification plant
Replies: 17
Views: 438

Re: CCS for waste wood gasification plant

I think the proportion of oxygen in the atmosphere has been relatively stable for a long time and the fact that things wont burn below 16% and will spontaneously combust above 25% is somewhat regulating. There have been a few "Great Oxygenation Events" but with plants continually producing...
by BritDownUnder
Fri Jun 04, 2021 9:59 pm
Forum: Electrical, Theory and Practice
Topic: Emergency national grid load shedding.
Replies: 2
Views: 216

Re: Emergency national grid load shedding.

Some interesting load shedding in the recent Queensland power outage. A coal fired generator caught fire and some other coal fired units then tripped a short time later causing an unusual tripping and underfrequency events around Queensland. Probably caused by not setting or testing the protection s...
by BritDownUnder
Fri Jun 04, 2021 9:55 pm
Forum: General Discussion
Topic: New coronavirus in/from China
Replies: 8506
Views: 265433

Re: New coronavirus in/from China

From what I hear the outbreak in Melbourne, Australia is now from two sources not one. The so called Delta and Kappa forms of the virus which are both Indian variants but could have come from anywhere. Looks like a double quarantine failure for Australia. Both forms appear to be more transmissible t...
by BritDownUnder
Fri Jun 04, 2021 11:52 am
Forum: General Discussion
Topic: New coronavirus in/from China
Replies: 8506
Views: 265433

Re: New coronavirus in/from China

I suspect that every country suffering badly from coronavirus have discovered or soon will discover that the problem is a variant named named after another country. We are suffering from the Indian variant. India is suffering from the Nepal variant. France is suffering from the Dover variant. Ghana...
by BritDownUnder
Wed Jun 02, 2021 9:58 pm
Forum: Biofuels & Biomass
Topic: CCS for waste wood gasification plant
Replies: 17
Views: 438

Re: CCS for waste wood gasification plant

It's already unavailable as CO2, burying the CO2 would increase the atmospheric O2 partial pressure. Plants can take the carbon and release the O2, as they have done since life evolved, but not if we bury it. I realise that the amount of O2 might be insignificant, but that's what people said about ...
by BritDownUnder
Wed Jun 02, 2021 10:59 am
Forum: General Discussion
Topic: New coronavirus in/from China
Replies: 8506
Views: 265433

Re: New coronavirus in/from China

It may have been an accidental release from a Chinese virology lab. The Chinese would never ever admit to that if it was, but there is no evidence that the virus is man made. The genetic sequence shows no signs of the typical manipulation done by gene splicing techniques, there are no identifiable ...