|
|
|
|
|
18th Jamadi-us-Saani 1435 | Saturday, Apr 19, 2014
Science

Sunita Williams tackles ISS coolant leak

Friday, 2 November 2012
Comments(0)
Houston, November 02:

Indian American record-setting NASA astronaut Sunita Williams along with another cosmonaut today troubleshot an ammonia leak in the International Space Station's cooling system, accomplishing the chief objective of their marathon six-hour excursion outside the orbiting lab.

Williams and Japanese space flyer Akihiko Hoshide ventured yesterday outside the space station at 1229 GMT (1759 IST) and just a little more than five hours later, they had reconfigured some coolant lines and deployed a spare radiator, isolating the leak.

"Suni and Aki, heartfelt congratulations to you," NASA astronaut Mike Fincke, who helped walk the astronauts through their tasks from mission control at the agency's Johnson Space Center in Houston, said at 1741 GMT (2311 IST).

"We accomplished just about everything we set out to do today. A big, huge congratulations to you guys on the ground for putting this together," Williams responded.

Each of the space station's eight huge solar panels has its own associated power system, and circulating ammonia helps cool this gear down.

The leak, which NASA and its space station partners first noticed in 2007, has the potential to affect one of these power channels if it's not fixed.

Today's Spacewalk, or extra-vehicular activity (EVA), a crucial step in that process was slated to last about 6 1/2 hours, and it proceeded pretty much on schedule.

By 0128 hrs IST, both astronauts had re-entered the space station through its airlock, and the spacewalk was officially over nine minutes later.

At the start of the spacewalk, Williams, commander of the station's current Expedition 33, and Hoshide made their way over to the port side of the station's backbone-like truss.

They rejiggered some lines in the affected coolant system and installed a spare radiator. NASA officials hope this stops the leak, which they suspect may be coming from the old (swapped-out) radiator.

If ammonia continues to escape, the station's operators will eventually have to try something else.

But there likely won't be an urgent need for a new fix, since the spare radiator should provide enough ammonia to keep the coolant system operating until next October or so, officials said.

It should come as no surprise that Williams and Hoshide ticked off their tasks efficiently today, for the two are seasoned space walkers.

In late August and early September, they replaced a vital power unit on the station over the course of two spacewalks, defeating an unexpectedly stubborn stuck bolt in the process.

Today's EVA was the seventh for Williams, the third for Hoshide and the 138th to depart from the station overall.

--PTI

Latest News

People are more concerned about their health at start of the week than w...

A new study analyzing weekly patterns in health-related Google searches reveals a recurring pattern ...

Pay outstanding salaries to pilots: HC to Kingfisher

The Delhi High Court has directed the grounded Kingfisher Airlines to pay the outstanding salaries o ...

Millionaire Maxwell promises better returns this IPL

He couldn't quite live upto the million-dollar price tag in the IPL last season but after a spectacu ...

Related News

3-million-year old green landscape found beneath ice sheet!

There was a green and forested landscape prior to the time that the ice sheet began to form in Green ...

Brain’s anti-distraction system found

Two psychologists from Simon Fraser University have made a discovery that could revolutionize doctors’ perception and treatment of attent ...

Sun emits M7-class solar flare

: Sun emitted a mid-level solar flare, which peaked at 9:03 EDT, on April 18. The solar flare was classified as an M7-class solar flare. ...

Post new comment

CAPTCHA
This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Image CAPTCHA
Copy the characters (respecting upper/lower case) from the image.

Rs. 29500 (Per 10g)

Opinion Poll
Do you think Kumar Vishwas can beat Rahul Gandhi in Amethi?
YesNoCan't say

Matrimony | Photos | Videos | Search | Polls | Archives | Advertise | Letters

© The Siasat Daily, 2012. All rights reserved.
Jawaharlal Nehru Road, Abids, Hyderabad - 500001, AP, India
Tel: +91-40-24744180, Fax: +91-40-24603188
contact@siasat.com