Accidental freon release inside ISS


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While doing maintenance to the air-conditioning system on the Russian portion of ISS two Russian astronauts accidently vented freon into the station’s atmosphere.

“Cosmonauts Samokutyaev and Serova performed steps to release pressure in the Russian segment’s air conditioner system by venting khladon gas (Freon 218) overboard. However, several of the quick disconnects that were actuated during the procedure exhibited leaks. As a result, the Khladon was vented into the cabin instead. The quantity released was approximately 100 g, which results in a density of 117 mg/m3 over the volume of ISS, which was below the stated ISS zero risk flight rule limit of 150 mg/m3. As part of nominal air scrubbing process, the Russian Air Purification System and the USOS Trace Contaminant Control System (TCCS) will remove residual Khladon from the atmosphere,” the NASA blog said.

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One comment

  • Joe

    So a little under 4 ounces, I don’t know how this refrigerant reacts to atmosphere, but if its anything like common transport refrigerants, I think it’s a non issue, I imagine it would be scrubbed by the ventilation system, and made inert.

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