[chimera]

A fast reactor for the power source, and 30 cm ion engines for propulsion. I was working on the rad-hard components for the PMAD systems. There is still some of that being done, but I don't know if it will ever fly as intended.

[Arkie2]

That's the setup discussed in this article. My impression was that the ion engine coupled with a nuke power plant was on the front burner for future deep space missions. Does the deferral of JIMO mean the research isn't going ahead with that combo or is the JIMO mission on hold for other reasons, like budget considerations.