Feeds

NASA 'nauts wrap ISS pump job

'Healthy' new cooling unit in place

Beginner's guide to SSL certificates

Spacewalkers Tracy Caldwell Dyson and Doug Wheelock have successfully installed a new ammonia pump module to replace the one which failed on 31 July, taking out half of the International Space Stations's cooling system.

Tracy Caldwell Dyson (left) and Doug Wheelock during today's spacewalk. Pic: NASA TVCaldwell Dyson (seen left in pic) and Wheelock's EVA officially began at 10:20 GMT. They moved the spare pump unit from an external stowage platform outide the orbiting outpost's Quest airlock and bolted it into place on the ISS's S1 truss.

NASA says the replacement unit - attached to the platform back in July 2006 during Discovery's STS-121 mission - was in "healthy condition" following electrical hook-up.

The agency adds: "After a pressure check and more fluid cable connections, ammonia began to flow into the module."

It's taken Caldwell Dyson and Wheelock three spacewalks to replace the pump. The first on 7 August lasted an epic 8 hours, 3 minutes, while the second on 11 August was 7 hours, 26 minutes. Today's EVA ended at 17:40 GMT, after 7 hours and 20 minutes.

When the old pump clapped out, ISS ground controllers "powered down numerous station systems and readjusted them to provide maximum redundancy" for the half of the cooling set-up which was still functioning. NASA has details of the ammonia-driven chilling equipment on page 63 of its ISS main systems guide, right here (pdf). ®

Choosing a cloud hosting partner with confidence

More from The Register

next story
Renewable energy 'simply WON'T WORK': Top Google engineers
Windmills, solar, tidal - all a 'false hope', say Stanford PhDs
SEX BEAST SEALS may be egging each other on to ATTACK PENGUINS
Boffin: 'I think the behaviour is increasing in frequency'
Post-pub nosh neckfiller: The MIGHTY Scotch egg
Off to the boozer? This delicacy might help mitigate the effects
The next big thing in medical science: POO TRANSPLANTS
Your brother's gonna die, kid, unless we can give him your, well ...
I'M SO SORRY, sobs Rosetta Brit boffin in 'sexist' sexy shirt storm
'He is just being himself' says proud mum of larger-than-life physicist
NASA launches new climate model at SC14
75 days of supercomputing later ...
Britain's HUMAN DNA-strewing Moon mission rakes in £200k
3 days, and Kickstarter moves lander 37% nearer takeoff
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
Getting started with customer-focused identity management
Learn why identity is a fundamental requirement to digital growth, and how without it there is no way to identify and engage customers in a meaningful way.
5 critical considerations for enterprise cloud backup
Key considerations when evaluating cloud backup solutions to ensure adequate protection security and availability of enterprise data.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Managing SSL certificates with ease
The lack of operational efficiencies and compliance pitfalls associated with poor SSL certificate management, and how the right SSL certificate management tool can help.