Russia Reports Coolant Leak in Backup Line at Space Station and Says Crew Not in Danger

Russian science lab at the International Space Station, on Oct. 9, 2023. NASA via AP

MOSCOW—Coolant leaked from a backup line at the International Space Station, Russian officials said Monday, adding that there was no risk to the crew or the outpost.

Russian space agency Roscosmos said that coolant leaked from an external backup radiator for Russia’s new science lab. The lab’s main thermal control system was working normally, the agency emphasized.