this post was submitted on 24 May 2025
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No, we have viable energy storage solutions already. We haven't built them out, but they are already feasible. And the best part about them is that they get more feasible each year, while nuclear becomes less and less feasible each year.
Assuming that you start today, by the time the first nuclear plant comes online, it will be so wildly uncompetitive that only huge amounts of subsidies will be able to keep it running.
Closing down existing nuclear was a mistake, and there's probably an argument to be made that scaling back on its construction and R&D was also a mistake. But trying to go back to nuclear at this point when renewables and storage are so obviously taking over is a larger mistake.
What viable solution we have for i.e. a week worth of energy in worst case scenario? Let's take Slovenia for example with yearly consumption of 12.95 TWh, a week worth of energy would be 248 GWh. And during winter this number is probably higher. How would you store it? Note that US consumption is twice as high and population is x150.
A scenario where you get zero production for a week is very unlikely - broadly speaking, you cope with this by building out production to produce a massive surplus, with various industries that can at variable rates use up the massive amounts of cheap power in the base case, then you build up storage to cope with the most likely scenarios of capacity reduction/smoothing out the price curve throughout the day.
It's also important to note that demand is far from static - people can and will reduce their usage when incentivized to do so, usually in the form of raising prices in low capacity scenarios. It's already starting to become quite popular to do so today, with spot price electricity plans allowing people to pay ridiculously low rates by aligning their energy usage with capacity availability - things like charging EVs/running laundry/running dishwashers/storing up thermal energy.
That's why I wrote "worst case". Imagine a winter rainy week with short days when heat pumps are running like crazy. But again, I have yet to see real energy storage solutions or real such scenarios.