Try to get anything "Nuclear" in this country going. One of the big problems is where the money is going to come from. Not trying to be a wet blanket, but many folks have tried to do this very thing over the past 20 years.
we have launched satellites with 'nuclear' batteries before and they were in strong containers. They have no risk of an explosion, this would be a good power source for whatever propulsion source comes out next.
I have no doubt that improvements will continue as usual.