[img=left]http://www.nasa.gov/images/content/153212main_iss023e020968.jpg[/img=left]Image above: NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first spacewalk as construction and maintenance continue on the International Space Station.
Image credit: NASA
Mastracchio, Anderson Outside for Second SpacewalkSpacewalkers Rick Mastracchio and Clayton Anderson began Sunday's spacewalk early at 1:30 a.m. EDT. The two are removing a spent ammonia tank from the station’s starboard, right-side, truss and replacing it with the new 1,700-pound, refrigerator-size tank they removed from Discovery’s payload bay on Friday. The ammonia is used for the station’s cooling system.
Anderson and Mastracchio started the second spacewalk at the spent ammonia tank to release it, move it and then store it until the final spacewalk on Tuesday. Next, the two will install two beams on the station’s port, left-side, truss to stow handles for use should a radiator need repairing before returning to the starboard side to install the new tank.
Mission Specialist Dorothy Metcalf-Lindenburger again will choreograph the spacewalk, serving as the intravehicular officer. Commander Alan G. Poindexter and Pilot James P. Dutton Jr. also will assist with the planned 6-1/2 hour spacewalk.
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