this post was submitted on 17 May 2024
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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.

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Five Things the “Nuclear Bros” Don’t Want You to Know About Small Modular Reactors (blog.ucsusa.org)
submitted 5 months ago* (last edited 5 months ago) by solo@kbin.earth to c/climate@slrpnk.net
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A realistic understanding of their costs and risks is critical.

What are SMRs?

  1. SMRs are not more economical than large reactors.

  2. SMRs are not generally safer or more secure than large light-water reactors.

  3. SMRs will not reduce the problem of what to do with radioactive waste.

  4. SMRs cannot be counted on to provide reliable and resilient off-the-grid power for facilities, such as data centers, bitcoin mining, hydrogen or petrochemical production.

  5. SMRs do not use fuel more efficiently than large reactors.

[Edit: If people have links that contradict any the above, could you please share in the comment section?]

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[–] solo@kbin.earth 2 points 5 months ago* (last edited 5 months ago) (1 children)

Thank you for sharing this link. It was very interesting listening to someone from within the US that is head of an office now and started from Shell Solar.

There is a reasoning that I didn't get. Maybe I misunderstood something or I lack some information/knowledge. Anyways, here it is:

At 1:02 they talks about nuclear waste saying that all the nuclear waste produced in the US by the nuclear power plants is like a football field that is 10 yards tall and then he talks about why this waste is not concerning.

Later at 1:07 He mentions that the US is not reprocesing the uranium fuel rods, in which 95% of the energy is still there, and that the US should do reprocessing like other countries do.

Doesn't that mean that these unprocessed rods in the US that are in the "football field of nuclear waste" are therefore a concern?

[–] Dippy@beehaw.org 4 points 5 months ago (1 children)

So energy remaining and radioactivity are separate. The isotope that it becomes has a decently long half life, but it might only be a few protons or neutrons away from something really radioactive.

I do believe that the fuel rods count towards that pile of waste. I think the US has laws or rules that make it hard or impossible to recycle these back into the good stuff, but it's very doable. France does it to a high degree.

[–] solo@kbin.earth 4 points 5 months ago (1 children)

Thank you for taking the time to reply. I think I kinda understand what you say but I have more reading to do. Currently I'm on some relevant wiki pages trying to get a better understanding [Spent nuclear fuel, Radioactive waste, Long-lived fission product].

In case you (or anyone) have any other links to suggest, please do not hesitate.

[–] Dippy@beehaw.org 5 points 5 months ago

Damn this website is so much better than reddit