"sharpthoughts" wrote:
Why must JIMO be nuclear? What's wrong with hydrogen fuel cells?

Capacity. Although you could probably deal with that by an EOR
strategy.

Alternatively, why not strap together 10 deep space ones and use the same
light collectors?

10x the light collectors might work, but would probably also require
EOR or heavylift. Light collectors (photovoltaics) are just okay for
MER, since Mars orbit still has enough light flux for reasonable size
collectors to work. Google on RTG in the sci.space.* groups for more
detailed comments on this.

/dps