It would require a radically new design that takes a lot of the cost out. You also have the spent fuel storage problem and the risk factors of a meltdown (however small) to tackle which are always working against you. Technology development in the Nuclear area is SLOW.

Now compare to batteries. There are thousands of companies working on new technology development.

It’s just a matter of brain power and capital working on the problems.

I don’t see a viable path forward for Nuclear at the current costs and with how dramatic the rise of renewables and battery storage is increasing.

The generic problem is that nuclear plants have to be big to amortize fixed costs (like personnel to operate and guard them), but if they're big they have lots of parts and more connections between parts, so to make them sufficiently reliable they need expensive careful construction. The more welds a NPP has, the more reliable each individual weld must be.

In contrast, something like a solar field, while it has lots of parts, doesn't depend on all those parts working for the field to work. It's by its nature highly redundant and fault tolerant. It also doesn't require supervision anywhere near the same extent as a nuclear plant.