The developer spoke about changing modules on the Russian orbital station

MOSCOW, December 22 Russian Orbital Space Station (ROS), which is planned to operate in low-Earth orbit for 50 years, during which time it can change three generations of modules, the press service of the Rocket and Space Corporation (RSC) Energia reported.
“The principles laid down during the creation of the ROS, and first of all the principle of open modular architecture, make it possible not to limit the life of the station due to the possibility of replacing expired modules with new ones,” said the agency’s interlocutor.
«The modules themselves will be replaced either after their designated service life (at least 15 years), or when the module becomes obsolete and there is a need to improve technical equipment, or when emergency situations arise that make it impossible for the module to function as part of the station. Possibly. “In 50 years, up to three generations of modules can change,” he added.

Earlier, the general designer for manned systems and complexes of Russia, general designer — deputy general director of Energia, Vladimir Solovyov, said that the developers are designing a new station with an expectation of its operating life of 50 years. During this time, the station plans to develop key technologies necessary for flight to other planets, primarily to Mars.

It is assumed that the ROS will be based on a core to which all other modules will be docked, which will make it possible to replace them.
As Roscosmos General Director Yuri Borisov reported, Russian President Vladimir Putin approved the creation of ROS, and active work on it will begin in 2024. The head of the state corporation estimated its cost at 609 billion rubles, 150 of which will be required in 2024-2026.

The first ROS module is planned to be launched in 2027, and five years later the construction of the station in orbit is to be completed. It will consist of scientific and energy, hub, gateway, base and target modules. The main feature of the new station will be its orbit; its inclination is planned to be 96.8 degrees.
Due to this, ROS will see the entire territory of Russia, which is impossible with the ISS flying in an orbit with an inclination of 51.6 degrees. In addition, in a high-latitude orbit, the station will be more susceptible to the influence of cosmic radiation, the study of which is also necessary for expeditions into deep space. As Anatoly Petrukovich, director of the Space Research Institute (SRI) of the Russian Academy of Sciences, clarified in November, the conditions in the ROS orbit will be “as close as possible in low-Earth orbit” to interplanetary conditions.