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  Home > Space & Science


Spacewalking Astronauts Tackle Space Station Power System Upgrade


NASA astronauts Shane Kimbrough (left in red stripe) and Peggy Whitson work retrieve adapter plates outside the International Space Station during a Jan. 6, 2017 spacewalk to upgrade the orbiting laboratory's power system. Credit: NASA TV

 


 January 7th, 2017  |  10:16 AM  |   618 views

SPACE.COM

 

Two NASA astronauts breezed through a spacewalk at the International Space Station today (Jan. 6) while performing upgrades to the outpost's power supply.

 

Expedition 50 commander Shane Kimbrough led the way as he and flight engineer Peggy Whitson ventured outside the space station into the void of space at 7:23 a.m. EST (1223 GMT).

 

Kimbrough and Whitson then spent more than six hours outside the space station on a mission to install three adapter plates and configure electrical connections in preparation for a new set of batteries that will be installed on the space station. These experienced spacewalkers zipped through their goals in a little over four hours, leaving enough time to complete three "get-ahead" tasks and even snap a few photos.

 

This was the first of two spacewalks astronauts will perform this month to finalize the replacement of 12 old nickel-hydrogen batteries six with new lithium-ion batteries. In a pre-spacewalk interview on NASA TV, Whitson said that the new batteries are exactly like the lithium-ion batteries in cell phones, only much bigger — one battery is about half the size of a standard refrigerator.

 

Nine of the old batteries will be shipped off along with the next cargo craft to depart the space station. Three remain on the station, disconnected and disconnected from the power grid. To integrate the new lithium-ion batteries into the existing power system, the astronauts also had to install adapter plates.

 

Prior to the spacewalk, a robotic arm named Dextre, or the Dextrous Manipulator, had to retrieve the batteries and adapters from the HTV-6 cargo spacecraft that delivered the batteries and other supplies to the space station last month.

 

After completing the installation of all six batteries and adapter plates ahead of schedule, the astronauts used their remaining spacewalk time to work ahead on some unrelated tasks, including the installation of a new ethernet cable. The spacewalkers returned to the space station's airlock after spending six hours and 32 minutes outside.

 

As Kimbrough and Whitson emerged from their EVA suits, NASA TV commentator Rob Navias wrapped up the live coverage by saying that the astronauts had "completed all of the work associated with the battery upgrades for the 3A power channel on the International Space Station — work to be replicated by the ground robotics team over the next week that will set the stage for Kimbrough to venture back outside into the void of space a week from today along with Thomas Pesquet," a French astronaut of the European Space Agency who will do his first spacewalk on Friday (Jan. 13).

 

Today's spacewalk marked the third in Kimbrough's career and the seventh for Whitson. Whitson also matched the existing record of most spacewalks done by a woman. She is also the oldest woman to travel to space. Whitson's accumulated spacewalk time is now 46 hours and 18 minutes, and Kimbrough now has 19 hours and 24 minutes.

 


 

Source:
courtesy of SPACE

by Hanneke Weitering

 

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