Will, Will, Will. We need to think outside of the box if we're going to deal with climate effectively. Nukes, god love 'em (somebody should) are not a lot more than a post war attempt to white wash Hiroshima and Nagasaki. Atoms for Peace! Right.
You have to make nuclear fuel which is a dangerous and toxic endeavor. Then you gotta do something with the spent fuel which will remain toxic for a very, very long tome. The half-life is north of 30,000 years.
So as good as it might be to get electricity from nuclear plants, there are a lot of draw backs. Now, you say that nukes are " one of the few on-demand forms of low-carbon energy. As such, it will be a crucial technology as we transition to net-zero." Well...
To be fair, wind and solar are pretty good but they have their limits and we know what they are. Hydro power is good too but we're having trouble getting enough water behind today's dams thanks to climate change and, truth be told, every river that might support hydro has already been dammed up.
There are two other forms of power generation that would work and that don't have mega corporations backing them because they're looking for a big pay day. They are geothermal and SBSP.
Geothermal takes very hot and high pressure out of the ground and uses it to drive conventional steam generators. It's not hard and there are projects literally all over the world being built right now. Check out ThinkGeoEnergy.com for an eyeful of good stuff.
As long as we're talking about spending billions on nukes, let's also consider SBSP or Space Based Solar Power. You basically launch a solar farm into geostationary orbit and it collects solar 24/7. Just like geothermal it is ideal for baseload power which is what you were referring to. SBSP is cool because the panels are upwards of 4x more efficient in the vacuum of space. In case you are wondering, power gets transmitted from space to your power grid via microwaves. SBSP can be placed in geostationary orbit by big rockets like the ones Elon wants to take us to the moon in.
So think bigger than 75 year old nuclear technology. Solving global warming is going to take all our efforts and we need the best ideas.
My work is done here.