The underlying technology does not exist in a production form, to the extent that it's not clear which basic reactor design option is going to be the future. So

The underlying technology does not exist in a production form, to the extent that it's not clear which basic reactor design option is going to be the future. So we can't know what the maintenance burden from a fisson rector is, much less one mounted on a train. Don't plan on tearing down those overhead cables just yet.