Spacewalks set to fix space station cooling pump
Publiée le 18 déc. 2013
Spacewalks set to fix space station cooling pump
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Astronauts will conduct a series of Christmas-week spacewalks to replace a faulty coolant pump aboard the International Space Station that has forced operations to be scaled back since last week, NASA announced Tuesday.
Two astronauts, Mike Hopkins and Rick Mastracchio, will start work outside the station on December 21, with follow-up spacewalks scheduled on December 23 and 25. The goal is to take out the pump that shut down December 11 and replace it with a spare already on board, the U.S. space agency announced.
The pump circulates ammonia through loops outside the station to keep equipment cool. The space station's life support system is up and running, but ISS operations were cut back as a result of the failure, NASA said.
The station currently houses six people. In addition to Mastracchio and Hopkins, Russian cosmonauts Mikhail Tyurin, Sergey Ryazanskiy and Oleg Kotov and Japanese astronaut Koichi Wakata make up the Expedition 38 crew.
The job will force NASA to put off the first commercial supply mission by Orbital Sciences Corp.'s unmanned Cygnus spacecraft, which was successfully tested in September. The launch had been scheduled for Thursday, but has been pushed back to at least January 13, the company and NASA announced.
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