status update on the Soyuz MS-22 mission and thermal concerns
An assessment from Vladimir Solovyov, the lead designer for Russia’s human spaceflight systems, notes a significant worry: if the radiator in the thermal control system on the Soyuz MS-22 is compromised, the spacecraft cabin temperature could climb to the range of +60 to +70 degrees Celsius. This alert was reported by TASS and reflects the gravity of the anomaly for crew safety and system reliability.
Following the detection of the damage, a comprehensive check of all onboard systems was conducted. The results showed that every subsystem was operating within normal parameters, save for the abnormal temperature rise. That means the crew remained safe in terms of life support and general functioning, but the thermal environment posed a potential risk that needed close scrutiny. Solovyov emphasized that elevated temperatures can affect both human occupants and the spacecraft’s electronics, where microcircuits may fail when temperatures approach the 40–50 degree Celsius mark.
Flight directors and mission specialists are keeping a vigilant watch on the Soyuz MS-22 to ensure it does not become a hazard to the International Space Station. Particular attention is being given to the landing control system, the suite of mechanisms responsible for guiding and executing a safe touchdown. This subsystem is crucial because it coordinates the sequence of events that culminate in a controlled landing, and any deviation could influence overall mission safety.
Solovyov explained a cooling strategy currently in play. The vehicle carries hydrogen peroxide used to initiate engine functions that enable a controlled descent. Hydrogen peroxide is sensitive to elevated temperatures, and cooling measures are being applied to maintain safe operating conditions for the descent sequence. This approach helps preserve the reliability of propulsion and landing actions during a high-temperature event.
Earlier statements indicated that the crew of Soyuz MS-22 was planned to return to Earth after a stay of approximately six months, a timeline that aligns with standard mission planning for long-duration flights. The evolving thermal picture has led engineers to adapt procedures to ensure equipment integrity and crew safety through the planned reentry and landing phases. The overall objective remains a safe return and a stable connection with the International Space Station, underscoring the ongoing collaboration among international partners and the continued emphasis on robust vehicle health monitoring during demanding spaceflight operations (Source: TASS).”