It became known that the air leak in the Russian Zvezda module on the International Space Station could not be eliminated using American plasticine. This was reported by RIA Novosti with reference to the negotiations of Russian cosmonauts with the flight control center.
Earlier, Russian cosmonaut Ivan Wagner used American plasticine to seal up two possible air leaks in the Zvezda module’s intermediate chamber. After that, to control the pressure, the hatch to the chamber was closed for several hours. This morning, the astronaut checked the pressure level in the Zvezda module compartment and reported to Earth that it had dropped to 634 mm Hg, whereas at the time the hatch was closed, the pressure was 724 mm Hg. Thus, within 12 hours, the pressure inside the compartment decreased by 93 mm Hg.
Recall: a small air leak on the ISS was first discovered in September last year. This year its speed has increased fivefold, from 270 g to 1.4 kg of air per day. Between August and September 2020, the crew closed the hatches in the station modules twice to check the tightness and identify the suspected leak. As a result, it was found that the air is escaping from the intermediate chamber of the Russian Zvezda module. Roscosmos believes that the leak does not pose a threat to the ISS crew and does not interfere with the station’s further flight in manned mode.
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