A 1987 nuclear device orbited by the Soviets is spewing radioactive debris. This has to be a good source of story ideas. I can see a modern techno-thriller based on this, or even a golden age type story. The solution to this problem must be technological, but an equally intriguing political aspect might be good for a story.
I would write it from the viewpoint of the cosmonaut that is sent up to investigate and boost it to a higher orbit.
It would be extra nice if there were an alien curled up inside the satellite, nibbling on the insulated wiring.