NASA astronauts Victor Glover and Mike HopkinsOn Saturday, 13 March International Space Station They had to check the vehicle for ammonia contamination during a spacewalk outside (ISS).
Note that the sun-facing side of the station needs a cooling system to control its temperatures. Without the cooling system outside temperatures 121 degrees would rise up. Therefore, the system Active Thermal Control System uses liquid ammonia pumped through pipes to keep the temperature constant.
ISS will continue research on the subject
About an hour before the spacewalk, astronauts were extracting ammonia from part of the system before relocating a jump line. Both Hopkins him the Gloverwas close to the hose when it was disconnected and ammonia flakes emerged from the system. “Oh yes, look at this” Hopper said as the airing began.
Although control and astronauts knew that some frozen ammonia flakes would be exposed, more than expected came out of the hose, so they needed extra safety measures.
About 10 minutes after aeration, mission control called for a pause and checked with astronauts how much ammonia was released. Hopkins officers “I felt more than I expected” said. Also, although Hopkins had the ammonia coming out of most stations and estimates that there were less than 30 flakes, some thought it was touching the visor of his helmet.
The mission control endorsed Hopkins’ opinion and “From our camera views here we’ve seen things that resemble the repulsive action of stamps, so we’ll go ahead and be conservative and call it a suspected case of contamination” found in the description.
After a visual inspection after the event, the astronauts’ clothes were found to be free of ammonia crystals. They will also check the ammonia crystals in the airlock when the mission control spacewalk is complete.
This requires extra care because the team wants to make sure no ammonia is brought to the station, as it is corrosive and can irritate the eyes and lungs.