If Russia permanently closes the hatch to the leaky PrK module (a small transfer tunnel attached to the Zvezda Service Module), the permanent loss of structural pressurization will permanently contain the escaping air Gizmodo. The crew would be permanently safer from depressurization, but Roscosmos would lose a vital docking port for Progress Resupply Spacecraft Gizmodo.
Sealing the hatch involves specific compromises and adaptations:
- Eliminating the Leak Threat: The primary goal is to isolate the microscopic cracks and welded joints causing a steady loss of atmosphere, minimizing the risk of rapid structural failure or emergency evacuation Gizmodo.
- Lost Access: Russian cosmonauts and NASA astronauts will no longer be able to use the affected passage to move between visiting spacecraft and the station’s interior Gizmodo.
- Adapting Supply Deliveries: The port will lose its pressurized cargo and crew transport capabilities. However, delivery of essential gases, water, and propellants from Progress vehicles will continue, as these are plumbed through exterior connectors outside the pressurized module Hackaday.
- Alternative Docking: Roscosmos will permanently reroute cargo and crew ferries to other functioning docking ports on the Russian segment Gizmodo.
By giving up the PrK module, both Roscosmos and NASA avoid the risks of further structural drilling and maintain the long-term integrity of the orbiting laboratory for the rest of its operational lifespan Hackaday.
