Roskosmos named a possible cause of damage to the skin of the Soyuz MS-22. Sergey Krikalev, executive director of Roscosmos for manned space programs, told the media that a micrometeorite could have caused damage to the skin.
The outer skin of the instrument and assembly compartment of the Soyuz MS-22 spacecraft could be damaged as a result of external impact. The cause of the leak may be a micrometeorite entering the radiator, possible consequences - changes in the temperature regime of the Soyuz spacecraft instrument and assembly compartment," Krikalev said.
According to the executive director of Roskosmos, now experts are analyzing the effect of leakage on the instrument and assembly compartment, on the ship and are looking at the heat balance. “No other changes in the telemetric parameters of either the Soyuz spacecraft, or the ISS, or the Russian or American segments have been detected, nothing threatens the astronauts, work continues and the analysis of the state of the ship continues,” Krikalev added.
On December 15, Russian cosmonauts interrupted preparations for a spacewalk due to depressurization of the cooling system of the Soyuz MS-22 spacecraft. Roscosmos and NASA said that the ISS crew is not in danger of the incident.
“The exit of cosmonauts Sergei Prokopyev and Dmitry Petelin from the International Space Station under the Russian program was canceled for technical reasons,” Roscosmos explained.
The Mission Control Center (MCC) of Roscosmos decided to stop work on the spacewalk of cosmonauts in connection with the depressurization of the external circuit of the cooling system of the Soyuz spacecraft docked to the ISS. “The ship is sealed inside, the station is also in full order,” the MCC said.
Media sources reported that the depressurization of the thermal control system of the Soyuz MS-22 could lead to the failure of the ship's instruments and is a serious incident.
“The situation is very serious. The accident occurred in the ship's thermal management system, which maintains the correct temperature and humidity. As a result, the ship’s instruments may fail - it will overheat in the Sun and freeze in the Earth’s shadow, ”said a media source. According to him, "Now Roscosmos specialists are thinking about priority measures to ensure an acceptable thermal regime for the operation of instruments on the ship." Due to the incident, the launch of the next Soyuz MS-23 manned spacecraft, scheduled for March 16, 2023, may be postponed to an earlier date.
Video of the leak process on Soyuz MS-22.
The NASA broadcast showed how fountains of technical liquid were being shot from the Soyuz MS-22. Later, the astronauts photographed the problematic ship from the windows of the station, and also examined it using cameras mounted on the ERA robotic arm. The crew sent the photographs to Earth for examination by specialists.
“According to preliminary information, on Thursday, December 15, there was damage to the outer skin of the instrument-assembly compartment of the Soyuz MS-22 manned transport spacecraft.
The crew reported that the warning device of the ship's diagnostic system went off, indicating a pressure drop in the cooling system. A visual inspection confirmed the leak, after which it was decided to interrupt the planned extravehicular activities by the crew members of the ISS Russian Segment Sergey Prokopiev and Dmitry Petelin.
To establish the causes of the incident, Anna Kikina, using a camera on a manipulator mounted on a multifunctional laboratory module, photographed and filmed the outer surface of the ship. The data was transferred to Earth, the specialists began to study the images,"
Roskosmos reported. “The crew received information about the activation of the signaling device of one of the diagnostic systems of the Soyuz MS-22 spacecraft. A commission is working to analyze the causes of the incident, and based on the results of its work, decisions will be made on the further actions of specialists on Earth and the crew of the Russian segment of the International Space Station, ”Roscosmos explained.
“Ground specialists are assessing the consequences of a coolant leak found on the Soyuz MS-22 spacecraft, nothing threatens the crew of the International Space Station. Mission controllers are evaluating the consequences of a coolant leak detected on the Soyuz MS-22 spacecraft,” NASA confirmed.
The Soyuz MS-22 spacecraft with the international crew of the ISS was launched into orbit and then moored to the ISS on September 21. On board the Soyuz MS-22 spacecraft were Roscosmos cosmonauts Sergei Prokopiev (ship commander) and Dmitry Petelin, as well as NASA astronaut Francisco Rubio. This flight was the first under a new agreement on cross-flights to the ISS, concluded between Russia and the United States. The planned flight duration of the Soyuz MS-22 expedition is 188 days. The end of their mission and the return to Earth of Soyuz MS-22 is scheduled for March 28, 2023.