The idiocy of the assumptions here are mind boggling. Let's assume that it's safer than current plants. A lot safer. But at 60MW, you need 18 to reach 1GW. So you have 18 of these, according to this fanboy article, distributed around the landscape. How are they guarded from terrorists?
Whether modular or not, nuclear needs to be centralized, heavily guarded and armored because a nuclear plant turns anyone's conventional weapons into a nuclear dirty bomb arsenal. Then there's the human factor. If you start scattering these around, they will get put in places they shouldn't, like flood zones, unknown faults, etc. We know what happens. If cars get safer, people drive more recklessly. It's human nature. If plants are safer, more corners will be cut. Either way, we will see continuing failures.
Don't get me wrong, we desperately need to do something about the current nuclear setup. Keeping 40 years spent fuel onsite is a huge disaster waiting to happen. The idea of a factory where they can recycle the plant and centralize the waste is good. I just wish someone would perfect a LFTR, use Thorium rather than Uranium, and most important do liquid chemical separation so the low-level waste can be segregated from the highly radioactive materials. I want to see nuclear waste reduced to levels below the original ore and buried, with the highly radioactive waste fed back and irradiated near the core to rapidly degrade them.
We haven't had a major disaster in the US, but we have come ridiculously close. In confessions of Rogue Nuclear Regulator, Jaszco says he visited a plant that was nearly flooded. If the river had crested two feet higher, they would have been in trouble. Passive cooling is great but not enough. Making sure the plant is highly secure, watertight, above any potential flood plain, heavily armored, these are the important things.
The people who should evaluate the sites for nuclear reactors are not nuclear fanboys, but wargamers and nuclear critics.The fanboys just say the chances are "1 in a million" which is the modern euphemism for "unsinkable" which is no longer permissible since we know better.
We need new nuclear capacity, so we can remove all the current (unsafe) reactors and burn through 40-50 years of fuel that is in those cooling tanks on site.
But solar and batteries are much better for most of the load. As a matter of national security, having overcapacity is a great idea. We should have solar on all new roofs that have access to sun, so that people have distributed communications and refrigeration backups and use less power.