The big problem with nuclear propulsion is always: What happens if a rocket with such an engine explodes at the start? What happens if it explodes in the upper atmosphere or accidentally reenters the atmosphere?
A "simple" nuclear engine might just contaminate a huge area in such a scenario. What does this new engine do, to prevent that from happening?
A "simple" nuclear engine might just contaminate a huge area in such a scenario. What does this new engine do, to prevent that from happening?