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Ultra Safe Nuclear

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311–320 of 536 posts

Re: Ultra Safe Nuclear

#311
post #93

Earlier quoted context omitted.

That's deaths per joule so far. How would nuclear compete if far more renewables were installed, producing far more joules? How about clean-up costs? Estimates for Fukushima vary from $76bn to $660bn depending who you ask. https://www.scientificamerican.com/article/clearing-the-radi... How about general carelessness? https://www.scientificamerican.com/article/nuclear-weapons-s... This is not unusual for the nuke indu…

Since deaths from renewables scale linearly with installations I think that nuclear will continue to win that particular argument. Building more wind turbines and solar installations is not going to reduce the deaths from installation and maintenance. I wonder what the clean-up costs are long-term for the groundwater contamination from solar panel production and for the dismantling and junking of wind turbines when t…

The type of renewable matters though, it seems like retrofitting existing houses with solar panels is relatively more dangerous than building utility scale solar farms (no roof to fall off from, higher yield).

Re: Ultra Safe Nuclear

#313
post #24
post #8

So why has nuclear waste become a thing that's not mentioned anymore? It was a pretty big thing in the 90's, now it seems to get brushed under the rug for all this 'safe' nuclear power marketing. It's mot just meltdowns and containment breaches that are a problem with nuclear power. None of the renewable alternatives produce radioactive waste that needs to be stored and dealt with. https://en.m.wikipedia.org/wiki/Rad…

I don't know, and I have been wondering whether much of the evident pro-nuclear lobbying recently (it seems apparent on many threads here related to energy generation) might be due to the nuclear industry being in serious threat of becoming obsolete. I've harped on about this many times before, but the levelized cost of energy[1] for renewables like solar and wind power is substantially cheaper than nuclear power now…

> have been wondering whether much of the evident pro-nuclear lobbying recently (it seems apparent on many threads here related to energy generation)

I think you are misunderstanding the selection bias. We're on HN, the selection bias here is that people tend to be more tech savvy and more informed. We have nuclear scientists here. You typically see acidburnNSA commenting in all these posts. I myself did radiation shielding research for NASA at a previous job. There's an old saying in the nuclear industry "Those that know the most, fear the least." I do not think it is "big nuclear" but rather that we're on a tech savvy forum. Take this to Reddit. You'll find more generalized forums are pretty anti-nuclear and more scientific forums are pro nuclear[0]. It really seems to come down to more where the conversation is taking place. I've met and worked with many climate scientists. I haven't met one that is anti-nuclear (I've met a few that think we don't need it if things keep progressing). If you press them on the subject most will just say they gave up because there is no support.

[0] I'll add that there's a lot of armchair talk and just ignore people that scream that Thorium is the answer. Easy way to pick out an armchair scientist. (Yes, I get frustrated with the armchair scientists that are even in my camp. Really moreso)

Re: Ultra Safe Nuclear

#314
post #141

Earlier quoted context omitted.

1. Forever. Uranium is a heavy metal, it's toxic regardless of it's radioactivity. 2. The US already has one [1]. Congress stopped it's opening, but it's sitting there built ready to be used. Europe also is constructing a disposal site [2] 3. Like I wrote in my comment, bury it in an area with no groundwater. 4. France does recycle it's nuclear waste. 5. We do, as I pointed out above. And for the second time, this wa…

> Forever How can anything with a cost that lasts forever be cheaper?

I mean, your car probably has a lead acid battery in it. Like uranium, lead is a toxic heavy metal, and it needs to be kept safe; it'll be as toxic in ten thousand years as it is now, and you should definitely avoid getting it in your drinking water (cf, Flint MI). Since your car has parts in it that need to be kept safe, in some form, forever, why is the cost of the car at the dealership not infinite? :)

Many, many industrial processes generate waste, sometimes horrible waste. Much of the waste needs to be stored in various ways, often indefinitely. Nuclear reactors aren't unique; it's more than a decent chunk of the population has noticed nuclear reactors, but is still oblivious to all the other costs of modern industrial lifestyles.

The good news about nuclear waste (and your car battery, come to that), is that dealing with it is actually fairly cheap. Would that we could say the same about the byproducts of burning fossil fuels!

Re: Ultra Safe Nuclear

#315
Eh. In my view, nuclear is very clearly safe enough, and has been for some time.

What's more interesting to me is whether it's cheap enough.

Re: Ultra Safe Nuclear

#316
post #254

Earlier quoted context omitted.

Right. So show me the balance sheet where building out reactors makes sense. Because as of right now it clearly doesn't, and the proof is that no one is building reactors but everyone is building windmills.

This is an incredibly weak argument, as most of the opposition to nuclear power even before widespread renewable deployment was political, not economic. Maybe the economics have changed with renewables, but that needs to be proved rather than can be inferred by the lack of US reactors being built. Take Germany’s recent denuclearization, the efforts are completely political, there was no mention of balance sheet optim…

>most of the opposition to nuclear power even before widespread renewable deployment was political, not economic.

Most of the opposition to nuclear power was about a whole lot of things other than politics or economics. Decades of quantifiable failure after failure in the environmental, construction quality, maintenance, radioactive discharge, siting-safety, and waste-handling realms, to name just a few. Everywhere the problems were the same, whether they were covered-up or not. The problems were those of an arrogant energy industry primarily concerned with minimizing expenses. The facts weren't political ... although the many, many cover-ups certainly were.

To overlook all that history and suggest that nuclear is just a political football is absurd. Had it been a quantifiable success, little of the resistance would have evolved. And Karen Silkwood might not have died. There was a lot of money and power at stake, and little tolerance for realistic concerns. The industry earned the disrespect it continues to enjoy.

Remember the widespread promise "Too cheap to meter"? In what year was that promise kept?

Re: Ultra Safe Nuclear

#317
post #315

Eh. In my view, nuclear is very clearly safe enough, and has been for some time. What's more interesting to me is whether it's cheap enough.

1% of commercial reactors Have failed catastrophically. Seems like terrible track record.

Re: Ultra Safe Nuclear

#318

Earlier quoted context omitted.

There is absolutely no "physics" that goes into those postings. It's just some gut feelings. I've come across this at least a dozen times, with people just sure that "physics" says something, but there is no physical principle that requires we decrease energy use to power the entire world with renewables and storage and possibly hydrogen or other synthetic carbon fuels. We can power all of the developing world at Wes…

Modern societies run on heat engines, and nuclear power is still a heat engine just with a carbon free source of heat. It's possible to run a carbon free modern society without drastic change in energy use, through using nuclear energy - France has done so successfully for decades. By comparison proposals to use renewables almost invariably involve immense amounts of energy storage which is nowhere near deliverable w…

I want to add to this because I think it is also something the gp is missing. Decarbonizing the country/world is about much more than cars and electricity. Currently it is only 60% of the problem[0]. That, and we have NO zero carbon power source, if you include lifetime emissions. None. Zip. Nada. So part of the answer is to get some of the other 40% to be included in electricity. That's things like electric stoves, lab grown meat, or electric heaters (also includes electric cars/vehicles).

So there is no way to even get to zero emissions (unless you use extraction methods like CCS). Then you have to consider that the US is 15% of emissions and the EU is 9% and where global emissions aren't heavily dependent upon electricity and transportation like they are in the modernized countries[1].

Truth is that most people are only looking at a small portion of the problem. So when someone naively says that we need to decrease energy usage to power the world with renewables it is naive because power is a small part of the global problem. Unfortunately, we're all in this together. Sadly, you ask an undeveloped country what they want: Hospitals, new homes, and electricity or a clean environment, well... we've done that experiment for a few hundred years with various populations. I think we have enough evidence to conclude an answer.

[0] https://www.epa.gov/ghgemissions/sources-greenhouse-gas-emis...

[1] https://www.epa.gov/ghgemissions/global-greenhouse-gas-emiss...

Re: Ultra Safe Nuclear

#319

Earlier quoted context omitted.

I wouldnt necessarily agree. It needs to be stored for a time that is longer than any single civilization has survived. Its pretty arrogant to assume we will still be around for that amount of time. This source pretty heavily influenced my change of opinion on nuclears efficacy https://www.pbs.org/video/independent-lens-containment/

The waste is buried under hundreds of meters of rock. And even if the containers eventually corrode, the waste needs to escape from this bedrock. The only way this is going to happen is either deliberately or through a meteor hitting in just the right spot.

> or through a meteor hitting in just the right spot.

It's 2020. Don't tempt fate /s

Re: Ultra Safe Nuclear

#320
post #290

Random renewable energy-related question that I've been thinking about: Specifically wrt solar, a big argument against is that it can't provide power during the night and we don't have a good way to store energy. What I'm wondering is why it's so imperative that residential/commercial properties are able to get full power from the grid 24/7? What if prices for power go way up during the night (because it can't come f…

Far as I can tell that argument isn't a technical argument. It's more of a lawyer type argument where you toss out objections and hope one of them sticks.

One of my memories was my dad taking me to work after dinner. They were running a wind tunnel. They were scheduled to run it at 9pm but the power company didn't give them the go ahead till 11pm. Which meant they weren't done to 2am. The reason, thing draws close to 200 MW. They ran it at night because it's cheaper. Not because they particularly loved blowing their evening into the late morning.

Lot of industrial users are chasing price.

Friend of mine has solar panels and lives in Arizona. She and her husband run the air conditioner full tilt in the afternoon off the panels and then turn it off when the sun goes down.

Much as I poop on the idea that free market pixie dust is the and only the solution to all of our problems. I would assume this is one it'll solve just fine. Seriously if running your air conditioner costs $1/hr in the afternoon and $5/hr after 8pm, you know what people will do.

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