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Nuclear fusion is close enough to start dreaming

bloomberg.com

41–50 of 87 posts

Re: Nuclear fusion is close enough to start dreaming

#41
post #3

> The nuclear fusion startup Helion, which announced last week that it has raised $500 million, says it has developed new technologies that may make nuclear fusion viable — practically, economically and environmentally. This is the only actual news in the article. The rest is bog-standard speculation.

Note that seven years ago, Helion said they were three years away from energy positive fusion. Today, they say they're... Three years away from energy positive fusion.

Re: Nuclear fusion is close enough to start dreaming

#42
post #4

Think of all the fusion powered direct air CO2 capture we could have <3

>Think of all the fusion powered direct air CO2 capture we could have Oh, trees? ;-)

For a tree to be an effective long-term sequestered of carbon, you have to ensure the tree never burns or decays. Obviously this can be done; you can sink it in anaerobic water or bury it deep in a mineshaft... but just letting forests grow wild doesn't get the job done anymore. Not since the end of the Carboniferous era. New forests don't make new coal deposits, that's a thing of the past.

Trees are still great though, for innumerable other reasons.

Re: Nuclear fusion is close enough to start dreaming

#45
post #26

Earlier quoted context omitted.

Is this still an issue when fusion power is available?

No, but the parent to my comment implied trees as being the source of that fusion power. Nobody's going to be able to use trees to power the desalination plants that allow us to irrigate the land so that we can grow those trees.

People have been growing coppice forests with salt tolerant trees such as willow for ages. No need to desalinate, the trees do it themselves. You can also use algae, which can grow in salt water.

The fusion energy that is powering the system is that of our sun. No perpetual motion machine required, our planet is being bathed in outside energy.

Re: Nuclear fusion is close enough to start dreaming

#46

Nuclear Fusion has been 20 years away for 70 years.

I was hopeful for a bit, then I saw some stuff like this: https://www.youtube.com/watch?v=JurplDfPi3U and realized nothing has changed. It's the same old shit: reporters being willfully ignorant, business people misleading the public, and on and on. Wake me up when you have plans for a full-scale, fully-functional fusion plant that can actually be built in an economically feasible way. Until then, I don't care.

The headline says "close enough to start dreaming"

I don't get it. If you're not into following the tech development, only interested in the final stage, why would you even open this and bother commenting?

Re: Nuclear fusion is close enough to start dreaming

#47
This sounds like 1950s claims of Fission being so cheap and clean that electricity would be almost free. Unanticipated externalities appeared in practice, resulting in high cost and pollution. Fusions heel may stray neutrons turnin reactor wall material highly radioactive.

Re: Nuclear fusion is close enough to start dreaming

#48
post #43

Earlier quoted context omitted.

Just like electric cars... Oh, wow, now we're actually driving electric cars!

We had electric cars 130 years ago.

Exactly. Just like we have fusion for decades.

As fusion isn't practical, electric cars were not practical mass mean of transportation until very recently.

Re: Nuclear fusion is close enough to start dreaming

#49
post #15

Earlier quoted context omitted.

What to do with spent fuel rods is more of a political problem than a technical one. Read up on Yucca Mountain. Current thinking is that the best approach to long term disposal is to find a cold hard-rock mountain where nothing has changed much in millions of years. Dig tunnels that are far above any possible flooding. Drill vertical holes in the tunnels. Package the nuclear waste in stainless steel thimbles, with th…

First question I have about it: wouldn't it be an attractive target for bombing/terrorist attacks or would it be rock solid enough to withstand those?

Terrorists are never a problem in the real world.

Eh, Americans.

Re: Nuclear fusion is close enough to start dreaming

#50
post #15

Earlier quoted context omitted.

What to do with spent fuel rods is more of a political problem than a technical one. Read up on Yucca Mountain. Current thinking is that the best approach to long term disposal is to find a cold hard-rock mountain where nothing has changed much in millions of years. Dig tunnels that are far above any possible flooding. Drill vertical holes in the tunnels. Package the nuclear waste in stainless steel thimbles, with th…

First question I have about it: wouldn't it be an attractive target for bombing/terrorist attacks or would it be rock solid enough to withstand those?

The threat of terrorism is massively overblown across the board, not just with respect to nuclear waste. The means to make conventional explosives are widely available, yet outside of a handful of conflict zones it is rarely done. Americans can buy gunpowder at walmart, yet how many pipebomb attacks have you heard of? A handful, but not many. Not many considering the country has hundreds of millions of people with ready access to the means to make them.

The incidence rate of people inclined to terrorism is vanishingly low. And when you start talking about plots that require numerous people to cooperate, rather than a single lonewolf nut, there is even less to worry about. The more people a plot requires, the less likely it is to actually happen. Coordinated attacks against nuclear power plants or waste disposal facilities are fantasy.

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