[FPSPACE] The Russian Elektron O2 (oxygen) generator failed unexpectedly last night
jameseoberg at comcast.net
Sat Jun 12 19:17:07 EDT 2010
ISS On-Orbit Status 06/12/10
Elektron Failure: The Russian Elektron O2 (oxygen) generator failed unexpectedly last night at 5:44pm EDT (under investigation). With a current ppO2 (partial pressure O2) of 159.75 mmHg, nominal crew metabolic rates (1.77 mmHg/day ppO2 decay for 3 persons) and ISS volume of 820 cubic meter (28,959 cubic feet), ppO2 would be at 148.9 mmHg at Soyuz 23S hatch opening (minimum flight rule limit = 146 mmHg). After 23S hatch opening, the 146 mmHg limit would be reached after another ~19 hrs (6/18, 5:00pm). Besides stored oxygen, there is also a large supply of SFOG (Solid-Fuel Oxygen Generator) "candles" on board (Russian: TGK).
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