Interesting concept to use nuclear pulse propulsion

It was studied for many years, and then abandoned after the adoption of the nuclear test ban treaty in 1963.

 

The idea is discussed in the following video.

Not all of the technical challenges could be overcome at that time. The sticking point seemed to be with the pusher plate. There wasn't any way to model it, so that it could be developed. In order to do the tests, real nuclear bombs would have to be used. Such a testing procedure was deemed to be infeasible. After the treaty, it became illegal.

 

A question: What if it were to be developed in deep space? It couldn't do much harm way out there. If such could be developed successfully, would it not be better to send large numbers of people to another planet, like Mars, using a few bombs? Such a system could be used instead of the Starship. Indeed, the Starship could be used to send up the large amount of mass needed to construct such an ark, and send it on its way.