this post was submitted on 18 Jan 2024
36 points (79.0% liked)

Climate - truthful information about climate, related activism and politics.

7062 readers
630 users here now

Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

Recommended actions to cut greenhouse gas emissions in the near future:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.

founded 2 years ago
MODERATORS
 

"President Joe Biden’s administration on Wednesday finalized approval of $1.1 billion to help keep California’s last operating nuclear power plant running. "

Because renewable energy sources are too expensive?

all 21 comments
sorted by: hot top controversial new old
[–] Wahots@pawb.social 20 points 2 years ago (2 children)

I'm all for nuclear power. We need to get off gas and coal ASAP, and nuclear is a reliable baseload power source that doesn't require massive arrays of lithium or lead batteries, and doesn't fluctuate with the rainy season. Ideally, I'd like us to go to more advanced nuclear power like molten salt reactors, but even light water is appreciated. I wouldn't mind it even in my own backyard. We need reliable energy.

[–] umbrella@lemmy.ml 3 points 2 years ago (1 children)

how is a salt reactor better? i tought reactors were all just glorified water boilers?

[–] Wahots@pawb.social 5 points 2 years ago* (last edited 2 years ago)

It is, but it's safer, since it's a fuel salt loop that has radioactive fuel mixed in, which is too dilute to melt down. It powers a second, independent molten salt loop that goes to a water boiler elsewhere in the system. This has a variety of benefits, and also depends on the tech. But one, it stops meltdowns. And two, if the salt loop or boilers fail, it doesn't release superheated, radioactive steam since the boiler is elsewhere in the complex.

Some can also recycle radioactive fuel that is already spent too.

Molten salt technology also has other benefits, nuclear energy aside. In solar towers with molten salt technology, it boils salts which then power a steam turbine. The salts are fucking hot, and stay hot enough to boil water for 12 hours after the sun has stopped shining. In the morning, some fuel is used to heat up the salts in prep for the sunlight. So, while it does use a bit of carbon, it provides reliable baseload energy that can serve the grid uninterrupted at night/during storms :)

Can't get the pic to link right. Here's a solar tower

[–] reddig33@lemmy.world 8 points 2 years ago* (last edited 2 years ago) (2 children)

How many solar panels and backup batteries would that buy? At $20k per home, that’s 50000 homes that could have their own power system.

According to a couple of articles, a nuclear plant like this can power 500000 homes. So not too shabby of an investment?

https://www.businessinsider.com/georgia-nuclear-reactors-billions-over-budget-years-behind-schedule-2023-12?op=1

[–] derf82@lemmy.world 4 points 2 years ago

Not only that, the nuclear plant will be producing power at its stated capacity 80% of the time or more, only coming offline for maintenance and refueling. Those solar panels will only produce its stated capacity 30% of the time of so.

https://en.wikipedia.org/wiki/Capacity_factor

[–] downpunxx@kbin.social 5 points 2 years ago

9.3% might not seem like a lot to some people, but it becomes paramount when other sources of energy like fossil fuels become scarce, during events like natural disaster, boycott, embargo, and war. keeping 9.3% up and running, and available is enormous.

[–] quindraco@lemm.ee 5 points 2 years ago

Because renewable energy sources are too expensive?

Nuclear power is the best option available and I'm confused why you're confused about that.

[–] CoolCookie@real.lemmy.fan 5 points 2 years ago (1 children)

Haven't seen a nuclear power plant that isn't basically paid for by the taxpayers and the people that need to buy that energy even more.

Remember, only actually renewable energy is good.

[–] Risk@feddit.uk 23 points 2 years ago (2 children)

Nuclear is an important stop gap in the process of replacing fossil fuels.

Trouble is, we're now so short of time that there's probably little benefit from making loads of new nuclear plants as they take too long to build.

[–] Anticorp@lemmy.world 5 points 2 years ago (1 children)

We're out of time. We crossed short of time 10+ years ago.

[–] CoolCookie@real.lemmy.fan 4 points 2 years ago (1 children)

A top gap cant take 10 years to build, its faster, more efficient and more economically to just go straight to renewables 100% shure, already standing ones don't need to be shut down, but we shouldn't focus on making new ones and decommission those that get too old (seriously looking at France here)

[–] Risk@feddit.uk 1 points 2 years ago

That's is precisely my point.

[–] kux@kbin.social 3 points 2 years ago* (last edited 2 years ago)

I remember reading the change of heart by the environmental activist / journalist George Monbiot[0] some years ago when he described in public why the fukushima disaster changed his opinion on nuclear power[1]

It's old but worth a read and is the reason why I still think that although the industry might be run by cunts (name one that isn't) nuclear power isn't a bad option in/of itself

[0] https://en.wikipedia.org/wiki/George_Monbiot#Nuclear_energy
[1] https://www.theguardian.com/commentisfree/2011/mar/21/pro-nuclear-japan-fukushima