According to Business Insider article , engineers have finally narrowed the location of the slow leak on ISS to the Russian Zvezda module.
NASA and Roscosmos, Russia’s space agency, had already narrowed down the likely location of the leak to several modules on the station’s Russian side.
So astronaut Chris Cassidy and cosmonauts Anatoly Ivanishin and Ivan Vagner tested those modules by shutting the hatches between each one and using an ultrasonic leak detector to collect data through the night. The tool measures noise caused by airflow too quiet for humans to hear.
By Tuesday morning, they’d figured out that the leak is in the Zvezda Service Module, the main module on the station’s Russian side. Zvezda provides that half of the station with oxygen and drinkable water, and it’s also equipped with a machine that scrubs carbon dioxide from the air. The module contains the section’s sleeping quarters, dining room, refrigerator, freezer, and bathroom.
They don’t yet know where in the module the leak is located, but at least they know at last where to look.
This module was the second module launched to ISS, launching in 2000. Thus, the leak could not have come from any construction workers from the ground. More likely its age has resulted in something changing. This needs to be fixed, but at the moment the situation is not critical.
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