Nuclear Rocket Engine

Fascinated with NASA NERVA project which commenced in the 50's but abandoned in the early 70's yet NASA are now considering these types of rocket motors again as a viable propulsion source necessary for deep space manned missions, this is my own take of a design for such an engine. I scaled up to 200% will take 20hrs to print on a Prusa MK2s with 15% infill G file around 60 meg