Russian cosmonauts train for emergency scenarios aboard the International Space Station
Russian cosmonauts Oleg Kononenko and Alexander Grebenkin have completed specialized training designed to prepare them for potential emergencies aboard the International Space Station (ISS), according to Roscosmos.
The two cosmonauts, serving as backup crew members for the ISS Expedition 76 mission, practiced responding to a simulated air-leak emergency in the Russian segment of the station. The exercise recreated a rapid loss of pressure in the Poisk module, requiring the crew to act quickly without relying on onboard documentation.
During the simulation, the cosmonauts had to locate the source of the leak and isolate the affected module. The exercise was designed to test their ability to respond effectively under pressure, when immediate action is essential to protect the crew and maintain the station's safety.
The training also covered routine maintenance and repair procedures that are essential for the long-term operation of the ISS. These included replacing equipment and components and responding to technical failures affecting life-support systems.
Kononenko practiced replacing a battery in the Zvezda service module, while Grebenkin trained to replace a temperature-control switch in the Zarya functional cargo module. The two also carried out a joint remote-control test between the space station and an attached spacecraft.
Additional exercises focused on life-support equipment. Grebenkin trained to respond to a fan malfunction affecting the Vozdukh carbon-dioxide removal system, while Kononenko practiced dealing with a valve malfunction in the Elektron-VM oxygen-generation system.
Such simulations form an important part of astronaut preparation because technical failures aboard a space station can develop rapidly and require crews to rely on established procedures and practical experience. Regular training allows astronauts to strengthen their ability to identify problems, protect critical systems and maintain safe living conditions in orbit.
The exercises also highlight the complexity of maintaining the ISS, where Russian and international crew members work together in a highly technical environment. As the station continues its operations, emergency preparedness and regular maintenance remain essential to ensuring the safety and continuity of scientific and orbital activities.
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