Ruscosmos is about a reusable gas-cooled fission reactor that powers a generator. This would power a plasma thruster.

They have made some physical models and some video simulations. They claim to have made components and a drip heat radiator.

Russian nuclear rocket claims from 2016, 2011 and 2010

In 2016, Skolkovo Foundation's Nuclear Cluster head Denis Kovalevich said Russia's Megawatt-class nuclear propulsion system for long-range manned spacecraft must be ready by 2017.

"At present we are testing several types of fuel and later we will start drafting the design," Kovalevich said. "The first parts [of the nuclear engine] should be built in 2013, and the engine is expected to be ready by 2017."

The engine is being developed for interplanetary manned spacecraft to ensure that Russia maintains a competitive edge in the space race, including the exploration of the Moon and Mars.