The competition heats up: According to Russian press sources, the first fuel for that country’s nuclear space engine project has now been delivered to Rosatom, Russia’s nuclear energy corporation.
The article is very unclear whether this space engine is a nuclear power plant similar to those used by NASA’s deep space Voyager, Pioneer, and Cassini probes, or whether it is a real nuclear-powered engine designed to provide thrust. Russia has never launched a probe with the former, so that would be an advancement for them, but it would not be a game-changer in the exploration of the solar system. If the latter, however, it will give them the capability no one else has to travel quickly and more efficiently to other worlds.
Based on a careful rereading of the article, I suspect the former.