NASA preps for spacewalks to fix failed valve on ISS

Reuters

by Reuters

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NASA is embarking on another spacewalk.

This time, it's to fix a failed pump valve that regulates the International Space Station's coolant system.

American flight engineers Rick Mastracchio and Mike Hopkins will be going on the first of three planned walks this Saturday.

NASA recreated the spacewalks on Earth and sent a video to the station so the astronauts can get their own preview.

During their first trip, they'll be tasked with de-integrating the failed pump valve and installing a jumper box.

The jumper box serves as a detour for ammonia to flow from the radiator as it cools electronic systems on the station.

Astronauts will remove the failed pump and begin installing a spare pump on the second and third walks.

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