Astronauts replace space station coolant pump

KENNEDY SPACE CENTER, Fla.--Astronauts Douglas Wheelock and Tracy Caldwell Dyson wrapped up a successful spacewalk Monday, installing a new ammonia pump to help flight controllers recover from a failure that shut down half the International Space Station's cooling systems.

"We had an extremely successful EVA today," Kirk Shireman, deputy manager of the space station program at the Johnson Space Center, said after the spacewalk. "We're very pleased with the results. We still have some more activities this afternoon and tomorrow to fully recover from the pump module failure, but things are certainly looking positive and we're looking forward to that."

Spacewalker Douglas Wheelock's helmetcam view of a newly installed coolant pump module, showing all four ammonia lines successfully mated.

(Credit: NASA TV)

Wheelock and Caldwell Dyson had hoped to finish the excursion by installing a long extension cord between the Quest airlock and the Unity module that is needed before attachment of a cargo module during a shuttle visit in November.

But work to pack up tools and equipment used for the pump replacement work ran a bit long and the cable installation was deferred.

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