Everything is going to have issues, but electrifying rail is proven technology and doesn't require the infrastructure to be 100% complete before it can be used. Building pipelines is far more expensive than power lines and you'd need to have hydrogen distribution across the country before rolling out hydrogen trains. Green hydrogen generation requires electricity too, so there's no difference in terms of the need for electricity.

There will always be problems with environmental catastrophes from nuclear materials on vehicles so it should be limited to only military naval vessels that need it. Using US naval personnel doesn't really solve the problem of inspections and maintenance, it's just shifting responsibility. The Navy would need to train more people to do these inspections and there's nothing about a Navy that makes that free.

As for nuclear trains, at the very least you have to admit that it’s not as simple as “just transmit power along the rail line from LA to NY”.

There are no simple solutions, but electrified rail is the simplest solution from all available options. Electrified rail is a century old technology and is implemented around the world already. As fun as it may be to come up with outside the box type solutions, we actually already have most of the technology needed to solve global warming, we're only lacking a willingness to implement it.