Feeds

ISS set for Friday chill-out

First spacewalk to replace failed ammonia pump

The smart choice: opportunity from uncertainty

The first spacewalk to replace the International Space Station's failed ammonia pump module will take place on Friday, NASA has announced.

The ISS is in a "stable configuration" following Saturday's breakdown of the "Pump Module for loop A that feeds ammonia to maintain the proper cooling for systems and avionics".

Attempts to revive the pump were unsuccessful, although with half of the station's cooling system still operative, the situation is not critical.

Expedition 24 members Tracy Caldwell Dyson and Doug Wheelock are tasked with swapping out the failed unit, which sits on the orbiting outpost's S1 truss.

There's a spare pump bolted to an external stowage platform attached to the Quest airlock, which the two astronauts will use to exit and re-enter the ISS.

NASA explains: "In the first spacewalk, they will unbolt and remove the failed pump module, and install the spare. A second spacewalk to hook up a variety of electrical and fluid connections for the new pump module is targeted for Monday."

At Johnson Space Center’s Neutral Buoyancy Laboratory, astronauts Cady Coleman and Suni Williams lent their support to Caldwell Dyson and Wheelock by "practicing underwater the tasks needed to restore the cooling loop over the course of two spacewalks".

Friday's EVA marks the fourth spacewalk for Wheelock, while Caldwell Dyson will be on her first external jaunt. NASA has more on the preparations here. ®

The Power of One Infographic

More from The Register

next story
World Solar Challenge contender claims new speed record
One charge sees Sunswift travel 500kms at over 100 km/h
SMELL YOU LATER, LOSERS – Dumbo tells rats, dogs... humans
Junk in the trunk? That's what people have
The Sun took a day off last week and made NO sunspots
Someone needs to get that lazy star cooking again before things get cold around here
Boffins discuss AI space program at hush-hush IARPA confab
IBM, MIT, plenty of others invited to fill Uncle Sam's spy toolchest, but where's Google?
Bad back? Show some spine and stop popping paracetamol
Study finds common pain-killer doesn't reduce pain or shorten recovery
Forty-five years ago: FOOTPRINTS FOUND ON MOON
NASA won't be back any time soon, sadly
Jurassic squawk: Dinos were Earth's early FEATHERED friends
Boffins research: Ancient dinos may all have had 'potential' fluff
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.