Comment on 40% of US electricity is now emissions-free

• partial_accumen@lemmy.world ⁨10⁩ ⁨months⁩ ago

  Plus much of the cost of nuclear is tied with the construction of the plant not the operating costs, so a paid off plant isn’t particularly expensive.

  I wish that were true. Nuclear plants built in the 60s and 70s (but still operating today) was losing money in Ohio. So the power companies bribed the Republican Ohio Speaker of the House $60 million dollars to pass a law that citizens have to pay extra fees totally over $1 billion dollars to power plants so that power companies can make a profit on nuclear. The bill was passed, and signed into law by the governor of Ohio, and years passed before the investigation found the bribery scandal.

  That former Ohio Speaker of the House was sentenced to 20 years in prison finally.

  The bad bribed-passed law is still on the books in Ohio and citizens are still paying extra to artificially make nuclear profitable for the power company. Here’s just a small source for the whole sorted story..

  So no, even old built nuclear power plants are still more expensive that nearly all other electricity sources in the USA.

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  • ironeagl@sh.itjust.works ⁨10⁩ ⁨months⁩ ago

    They’ve had to keep upgrading them - the percentage of nuclear is the same, but no new plants have been built, so that extra power has come from research on how close to the red line they can actually run.

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    • partial_accumen@lemmy.world ⁨10⁩ ⁨months⁩ ago

      New reactors just came online in Georgia this year. A $15 billion dollar planned project that cost $30 billion with overruns.

      So new or old, nuclear is really expensive electricity.

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      • ironeagl@sh.itjust.works ⁨10⁩ ⁨months⁩ ago

        A coal power plant is rougly the same cost per GW as solar or wind, doesn’t mean we should build more of them. I agree it’s expensive, but so were solar and wind a couple decades ago. Government investment helped research, development, scaling up - imagine if that had been done in the '80s, we wouldn’t be building natural gas plants right now.

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  • DanglingFury@lemmy.world ⁨10⁩ ⁨months⁩ ago

    Besides maybe coal

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• frezik@midwest.social ⁨10⁩ ⁨months⁩ ago

  That consistent output isn’t as useful as you think. Solar and wind are ridiculously cheap, so we would want to use them when they’re available. That means winding down nuclear plants when those two spin up. I’m turn, that means those initial construction costs you mentioned aren’t being efficiently ammortized over the entire life of the plant.

  What we can do instead is take historical sun and wind data for a given region, calculate where the biggest trough will be, and then build enough storage capacity to cover it. Even better, aim for 95% coverage in the next few years, with the rest taken up by existing natural gas. There’s some non-linear factors involved where getting to 100% is a lot harder than 95%.

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  • CrimeDad@lemmy.crimedad.work ⁨10⁩ ⁨months⁩ ago

    This is the trap. The fossil fuel industry has co-opted wind and PV solar by way of filling in the gaps and transitioning to net zero emissions. Of course, the gaps will always be there and the transition will never complete and “net zero” seems to just leave the door open on fossil fuels forever.

    Nuclear power, on the other hand, has the reliability that @FireTower@lemmy.world mentioned and it closes any of the gaps from wind and solar right up. You don’t have to quickly cut the power on a reactor if it’s sunny or windy, just divert it to hydrogen and ammonia production. Even if the efficient high temperature electrolysis tech isn’t ready yet, it doesn’t really matter since it’s emissions free. Furthermore, nuclear power produces good heat/steam to support cogeneration and various industrial processes.

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    • frezik@midwest.social ⁨10⁩ ⁨months⁩ ago

      Nonsense. Conservatives have brought up nuclear for decades as a way to play “gotcha” with anti-nuclear progressives. Maggie Thatcher, for example, embraced the science of climate change early on as a way to push nuclear. It was never serious, though. Always a political game that resulted in no new nuclear being built while coal and oil continued to ramp up.

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      • CrimeDad@lemmy.crimedad.work ⁨10⁩ ⁨months⁩ ago

        I think Thatcher just wanted to privatize, deregulate, and liberalize as much as she could, all fundamentally bad moves from the perspectives of both labor and greenhouse emissions concerns.

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  • GabberPiet@lemmy.world ⁨10⁩ ⁨months⁩ ago

    The problem is that there are currently no good (cheap, scalable) technologies to store these large amounts of electrical energy.

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    • frezik@midwest.social ⁨10⁩ ⁨months⁩ ago

      There are several lines of storage research that only need to be ramped up to mass production at this point. Since stationary storage doesn’t have the weight restrictions that electric car batteries do, there are many different viable options. Flow batteries, sodium batteries, pumping water uphill, big tower of concrete blocks on pullies, hydrogen electrolysis, big ceramic block that gets hot. Some will work wherever, others are only viable in certain situations, but there are many options and we only need one of them to work at scale.

      When nuclear tries to make improvements, it tends to do one thing per decade. If it fails, wait another decade to try the next thing. Last decade, it was the AP1000 reactor. It was hoped it would make a single, repeatable design that would avoid the boutique engineering that caused budget and schedule overruns in the past. Didn’t work out that way. This decade, it’s Small Modular Reactors. The recent collapse of the Utah project doesn’t give much hope for it.

      Even if it does, it won’t be proven out before 2030. We’ll want to be on 90% clean electrical technology by then if we have even a hope of keeping climate change at bay. There is no longer a path with nuclear that could do so. Given project construction times, the clock ran out already.

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      • GabberPiet@lemmy.world ⁨10⁩ ⁨months⁩ ago

        I think most of the technologies you mention are currently still too expensive, can’t be used everywhere or don’t make sense to be used at a large scale. E.g. for pumped hydro you need height differences. Concrete blocks on pullies sound like you need a lot of space for only a small amount of energy (I didn’t do the maths, this is just my feeling, so correct me if I’m wrong).

        About nuclear energy: in the article I saw that it accounts for 18% of the US electricity production. That’s half of the 40% emissions-free part. So for sure we cannot reach the targets without nuclear energy. My opinion is that we should keep using it and keep investigating it further, just as we should keep investigating new electricity storage technologies.

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      • IamtheMorgz@lemmy.world ⁨10⁩ ⁨months⁩ ago

        While I don’t disagree that it’s going to be too late, I do think SMRs are likely to go the distance, at least abroad.

        The reality is that we aren’t going to hit 90% carbon free by 2030 without a huge social and political shift. There’s just no way that is happening in 6 years. I really hate being a downer about it but I think we need to face the facts on it.

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    • iknowitwheniseeit@lemmynsfw.com ⁨10⁩ ⁨months⁩ ago

      Pumped hydro works well for storage, although it basically has the same problem as hydro power - it’s only available in places with water and elevation changes.

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      • Justas@sh.itjust.works ⁨10⁩ ⁨months⁩ ago

        Yes, but an elevation change of 100 meters is enough for one: The one near me for example

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    • Waraugh@lemmy.dbzer0.com ⁨10⁩ ⁨months⁩ ago

      If every home was a battery instead of an armory that would be a really cool redundant storage infrastructure. Likely not financially viable compared to centralized storage but it would be kind of cool if their was no immediate central reliance on power so any interruption in power generation could withstand say 1 week of storage reserves nation wide before outages started trickling off to support say hospitals, heating above 40 degrees, etc. Entirely too complicated I’m sure but just a neat thought I had after reading your comment.

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    • oyo@lemm.ee ⁨10⁩ ⁨months⁩ ago

      Even current lithium-based battery storage is already cheaper than nuclear.

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      • GabberPiet@lemmy.world ⁨9⁩ ⁨months⁩ ago

        It does not make sense to compare the price of energy storage (lithium batteries), with the price for generating electricity (nuclear energy), or do you mean something else?

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    • Trainguyrom@reddthat.com ⁨10⁩ ⁨months⁩ ago

      Don’t forget power companies can also work with smart thermostat manufacturers and car manufacturers to implement demand side tweaks to reduce power consumption. If they need to drop demand by some number of megawatts, they can adjust everyone’s thermostate by 1 degree temporarily and easily meet that need, or slow electric car charging by half a kilowatt. As long as there’s a manual override for users who need to charge right then or need to change the thermostat right then, this can easily make a significant dent in the variability of the grid with renewables

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  • iknowitwheniseeit@lemmynsfw.com ⁨10⁩ ⁨months⁩ ago

    I totally agree with this. A lot of places have cheap electricity in off-peak hours, as a workaround to this limitation (steady output).

    I think that this obsession about intermittent power comes partially from the idea that any new sources of power must be drop-in replacements for the systems that we’ve had for so many decades. However those systems run the way they do as an accident of technology, not because of a careful analysis and design to match optimal usage patterns.

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    • Trainguyrom@reddthat.com ⁨10⁩ ⁨months⁩ ago

      I appreciate seeing a serious, well thought out comment posted from a lemmynsfw account!

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  • KillingTimeItself@lemmy.dbzer0.com ⁨10⁩ ⁨months⁩ ago

    im assuming by “winding down” you mean production of power? Not shutting down the plants, nuclear plants operate the most efficiently at high capacity factor, when they aren’t producing power the fuel is still decaying, thus you should be producing power for AS LONG as possible. This is why if you ever look at capacity factor >80% is really common, i’ve even seen >100% a couple of times, as well as the term “baseload plant” being used almost always in reference to nuclear.

    That wouldn’t make sense for an existing nuclear plant, the nuclear plant should stay running in place of solar/wind. As you would be burning money actively otherwise, or you could just shut it down permanently, thats the other option.

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    • frezik@midwest.social ⁨10⁩ ⁨months⁩ ago

      Yes, running them at a lower level, and yes, that would be my point. You can run them down when renewable sources pick up, but that’s inefficient. Solar/wind don’t mix well with nuclear; you’re leaving something on the table if you try.

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      • KillingTimeItself@lemmy.dbzer0.com ⁨10⁩ ⁨months⁩ ago

        That’s not a particularly complex way of looking at it. the nuclear plant is a base load plant, meaning you can pretty much just subtract its output from the predicted consumption, and then you can simply have less renewable energy, load peaking is midday anyway, which is when solar is productive. (or have less energy storage, since the nuclear plant will combat that), you would have a more consistent and regular power production at that point, and waste less money. (since you aren’t burning money on running a nuclear plant at a reduced/no output, you would technically be burning solar energy (you cant burn wind energy, you just stop the turbine, and it wont produce power) but that’s cheaper anyway, and besides beyond install costs, very low continual maintenance)

        Though if you were going to shutdown the nuclear plant at its EOL then you would need to increase production of renewables, which is easy enough. Saying that “nuclear and solar/wind don’t mix” is just kind of weird. Realistically the only better mix would be solar/wind and gas since gas can manage peak loads super trivially, which is of course not very green. So arguably nuclear would be your ideal match unless you went explicitly solar/wind.

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  • IamtheMorgz@lemmy.world ⁨10⁩ ⁨months⁩ ago

    The storage capacity is the hard part. Batteries aren’t really a viable option (we don’t really have good enough batteries, limits on how many can be made with current resources, etc).

    Dams would be good (pump water uphill when electricity is cheap and release when you need the energy back), but dams are not a viable option everywhere and also have a high environmental impact and are arguably not the safest thing for a community.

    I read somewhere recently about the idea of putting smaller batteries in individual homes, basically distributing the power ahead of time to a certain number of places so they are not taking from the grid in peak times, but it would be hugely expensive still, and I also question if we have the ability to make so many batteries, much less get enough people to install them.

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    • frezik@midwest.social ⁨10⁩ ⁨months⁩ ago

      We have plenty of options. Grid storage doesn’t have the same size and weight limitations that electric cars do, which opens up many more possibilities. Flow batteries are getting cranked up for mass production, and that’s probably all we need. Even if that doesn’t work out, there are other directions to go.

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  • assassin_aragorn@lemmy.world ⁨10⁩ ⁨months⁩ ago

    Consistent output is certainly useful when you break down demand into a constant demand + variable demand. For instance, if demand is typically 200-350 kWh, you could build a nuclear plant to generate 200 kWh and constantly run while you meet the varying 0-150 kWh demand with wind and solar.

    I will agree though that we need to run numbers on this to determine the best approach. I don’t have a feel for what wins out if we make larger solar and wind farms – increased cost for the additional capacity, or increased efficiency from economies of scale.

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• Halcyon@discuss.tchncs.de ⁨10⁩ ⁨months⁩ ago

  Don’t leave out the deconstruction of old nuclear plants after their operational time and the storage of radioactive waste. It’s very laborious and expensive.

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• leds@feddit.dk ⁨10⁩ ⁨months⁩ ago

  Nuclear power is bad for its consistent output because demand is not constant. You could of course run some energy hungry chemical reaction when there is more power than demand, make hydrogen to use for synthetic fuels for example or build a battery to store the excess power for when the demand is high. But is is of course much cheaper with renewables.

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  • assassin_aragorn@lemmy.world ⁨10⁩ ⁨months⁩ ago

    Total demand is not constant, but you can represent total demand as a sum of a given constant demand plus variable demand. Say for instance the average demand varies from 200-350 kWh a year. You could run nuclear power plants to generate 200 kWh worth of electricity, and use solar/wind for the remaining 0-150 kWh demand. It would be fairly efficient to have nuclear provide a base load of some kind while solar and wind vary to meet the full demand.

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  • ironeagl@sh.itjust.works ⁨10⁩ ⁨months⁩ ago

    Hydro is best as a giant battery bank, and pairs quite well with nuclear.

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• Poutinetown@lemmy.ca ⁨10⁩ ⁨months⁩ ago

  Hydro is also quite independent but it’s heavily dependent on geography. That’s how Canada is able to be much ahead in renewable energy.

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• BastingChemina@slrpnk.net ⁨10⁩ ⁨months⁩ ago

  Also, having nuclear in a 100% low carbon grid is great to stabilize the grid.

  A French study showed that having around 13% of nuclear in the grid reduce the solar and battery capacity needed by a factor of two compared to no nuclear.

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