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NASA astronauts complete 2nd spacewalk to replace ISS coolant pump

RIA Novosti

01:53 12/08/2010

MOSCOW, August 12 (RIA Novosti) - NASA astronauts have completed the second of three spacewalks to fix a failed cooling pump on the International Space Station (ISS), NASA said on its website.

During the spacewalk, which lasted 7 hours and 26 minutes, Expedition 24 Flight Engineers Doug Wheelock and Tracy Caldwell Dyson removed the failed ammonia coolant pump module.

"Wheelock successfully closed the quick disconnect valve for the final fluid connector for the failed ammonia pump module. Then he successfully detached the final fluid line from the failed ammonia pump module," NASA said on its Website.

One of two cooling systems serving the ISS broke down late on July 31, and the crew had shut down several pieces of equipment, including two of the station's four gyroscopes, to cut the heat generated on board.

The third spacewalk to install and activate a new pump will be held no earlier than Sunday, NASA added.

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