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Cassidy and Behnken Conclude ISS Spacewalk to Replace Batteries

Spacewalk Took Six Hours And Seven Minutes

NASA astronauts Chris Cassidy and Robert Behnken concluded their spacewalk, Friday, at 1:39 p.m. EDT, after six hours and seven minutes.

The two NASA astronauts completed all the work planned for this first of four spacewalks to replace batteries that provide power for the station’s solar arrays on the starboard truss of the complex as well as initial tasks originally planned for the second scheduled spacewalk next Wednesday. The new batteries provide an improved and more efficient power capacity for operations.

The spacewalkers removed five of six aging nickel-hydrogen batteries for one of two power channels for the starboard 6 (S6) truss, installed two of three new lithium-ion batteries, and installed two of three associated adapter plates that are used to complete the power circuit to the new batteries. Mission control reports that the two new batteries are working.

Cassidy and Behnken are scheduled to complete the upgrade to this initial power channel in a second spacewalk on July 1, during which they will install one more lithium-ion battery and one more adapter plate and remove the sixth nickel-hydrogen battery that will no longer be used.

This was the seventh spacewalk for each astronaut. Cassidy now has spent a total of 37 hours and 21 minutes spacewalking, and Behnken has spent a total of 43 hours and 40 minutes spacewalking.

Space station crew members have conducted 228 spacewalks in support of assembly and maintenance of the orbiting laboratory. Spacewalkers have now spent a total of 59 days, 18 hours, and 33 minutes working outside the station.

FMI: www.nasa.gov

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