I’ve been asked several times if I’ve ever come across a design for or even reference to a manned version of the Project Pluto Supersonic Low Altitude Missile. Short answer: no. However, I’ve come across several nuclear ramjet powered manned aircraft. Not many, as the idea is pretty loopy; a manned aircraft is *almost* by definition meant to be resuable, but there is as yet no such thing as a nuclear ramjet that doesn’t eat itself in relatively short order.
Still, that hasn’t stopped a few aircraft designers from putting forward manned nuclear ramjet vehicles. Such as the one shown below, proposed by Alexander Kartvellie of the Republic Aircraft Corp in the early 1960’s. This monster included solid rocket boosters for a zero-zero launch, two nuclear ramjets, turbojets for a non-nuclear landing and a payload of several rather large weapons. The crew are in the massivley shielded conpartment in the nose.

There will be substantially more on this aircraft if I do write the Project Pluto book I’m hoping to do. Still waiting to hear back from the USAF on some documents. These documents might make the difference between this book project being either:
A} “Project Pluto: The Ultimate Book::
or
B} “Nuclear Powered Flying Death Machines… Pluto, ANP/NEPA/NX-2 and a Little Bit About Project Orion.”
Option “B” is if the documents are a bust. I don;t have quite enough to do a whole book just on Pluto and do it right, but I’ve more than enough on the more general nuclear-military-flying-machine concept.