I found this, model of proposed Russian nuclear powered orbital tug Zeus, displayed at MAKS recently:
The smaller one with the copper coloured radiators is the variant with ion engine. The giant one is a scaled up version with some kind of plasma engine. The two in the back are historical US-A and US-P spacecrafts (also powered by reactors) for size.
The smaller one with the copper coloured radiators is the variant with ion engine. The giant one is a scaled up version with some kind of plasma engine. The two in the back are historical US-A and US-P spacecrafts (also powered by reactors) for size.