The PrK transfer tunnel on the International Space Station (ISS) has been under close observation due to a persistent air leak. NASA and Roscosmos have collaborated for years to investigate the leak's origins and implement strategies to minimize air loss. Various sealants, both temporary and permanent, have been deployed by Roscosmos as part of their ongoing efforts to manage the situation.
Increased Leak Rate Noted During Progress 95 Operations
Recent updates from NASA reveal that a heightened leak rate was detected during cargo operations with the Progress 95 spacecraft in early June, rising to approximately two pounds per day. Engineers have identified new potential leak sites within the PrK tunnel.
In response to these developments, Roscosmos announced plans for a thorough inspection and structural repairs. This revised strategy includes cutting a bracket to enhance access to areas believed to be contributing to the leak, although NASA cautioned that this approach could pose risks to the surrounding structure.
Astronauts Take Precautionary Measures
Due to the potential structural risks, NASA advised the four members of SpaceX Crew-12 and astronaut Chris Williams to adopt a precautionary safety posture known as a safe haven. Williams arrived at the ISS aboard the Soyuz MS-28 spacecraft.
During the evaluation of the repair procedures, the astronauts took refuge inside the SpaceX Dragon spacecraft as a safety measure.
Roscosmos Halts Repairs for Further Analysis
Later that same day, Roscosmos opted to pause the repair efforts to gather additional data and measurements. This decision was made after careful consideration of the suspected leak areas and previously applied sealants. NASA fully endorsed this approach, emphasizing the importance of thorough data collection before proceeding with repairs.
Following the suspension of repair work, Crew-12 and Williams exited their safe haven and resumed regular operations aboard the ISS. NASA remains committed to working in conjunction with Roscosmos and other international partners to address the leak effectively and ensure the safety of the crew.
