ISS Crew Repair Carbon Dioxide Removal System, Prepare For New Supplies

Aug 29, 2005

The residents of the International Space Station last week unloaded cargo delivered to them last month by Discovery's astronauts, prepared for the arrival of more supplies and repaired a key component of the outpost's environmental control system.

In the fifth month of their six-month mission, Expedition 11 Commander Sergei Krikalev and NASA Flight Engineer and Science Officer John Phillips completed the unpacking of cargo bags transferred to the Station's Zarya module from the Shuttle Discovery three weeks ago.

They planned to unload other bags stowed in the Unity and Zvezda modules in the days ahead. All of the unpacked items were entered into the Station's computerized inventory system.

On Friday, the crew began to fill the ISS Progress 18 resupply craft docked at the aft end of Zvezda with trash and unneeded gear. The Progress craft will undock from the complex at 5:23 a.m. CDT Sept. 7. It will be commanded to fire its engines to enter the Earth's atmosphere and burn up over the Pacific Ocean.

That will set the stage for the 8:08 a.m. CDT Sept. 8 launch of the ISS Progress 19 cargo vehicle from the Baikonur Cosmodrome in Kazakhstan. EDT. Filled with more than 2.5 tons of food, fuel, oxygen, water and spare parts, Progress 19 will automatically dock to the Station at 9:50 a.m. CDT Sept. 10. The docking will be broadcast live on NASA Television.

Among the items to be carried aboard Progress 19 is a new liquids unit for the Russian Elektron oxygen-generation system that failed several months ago. The liquids unit circulates water through the Elektron, separating it into hydrogen and oxygen through electrolysis. The hydrogen is then vented overboard and the oxygen is circulated into the atmosphere for breathing.

While Elektron has been inactive, oxygen from the Progress 18 tanks has been used to repressurize the cabin atmosphere. Multiple sources of oxygen are available for use by the crew with ample supplies available.

Last Tuesday, Krikalev repaired the Vozdukh carbon dioxide removal system by replacing a faulty valve. Vozdukh shut down late last week, prompting the temporary use of another air-scrubbing system, the U.S. Carbon Dioxide Removal Assembly (CDRA) in the Destiny Laboratory.

Also on Tuesday, Krikalev and Phillips took time to discuss life and work aboard the Station with students gathered at the Cincinnati Museum Center in Ohio. The educational event was broadcast to schools in the Ohio Valley.

On Wednesday, Phillips replaced a failed laptop computer used to house inventory and information about the Station's medical supplies. The computer experienced problems three weeks ago during Discovery's visit.

They also spent 90 minutes Wednesday practicing emergency procedures during an exercise that simulated the rapid depressurization of the Station's cabin. Rehearsals of this nature are conducted periodically to maintain proficiency for the crew and flight controllers.

In addition to exercise and routine maintenance, the crewmembers stowed spacewalking tools they used the week before during their excursion outside the Pirs Docking Compartment to retrieve experiments and hardware. The spacewalk was the only one planned for Expedition 11.

Copyright 2005 by Space Daily, Distributed United Press International

Explore further: Planck helps to understand the macrostructure of the universe

Related Stories

Scientists tackling Gulf of Mexico hypoxia

Feb 12, 2015

Bouncing along the edge of a field, Larry Berry points across the pasture toward a tree line marking the path of a creek bed. A small plastic shed sits atop a wooden platform on stilts.

Space exploration promises to be spectacular in 2015

Jan 06, 2015

There is no doubt that 2014 was a fantastic year for planetary sciences – the high points were the successful landing of Philae on comet 67P, the discovery of methane by the Curiosity rover on Mars and ...

The worst trip around the world

Dec 22, 2014

As you celebrate the end of the year in the warmth of your home, spare a thought for the organisms riding with a third-class ticket on the International Space Station – bolted to the outside with no protection ...

Recommended for you

Image: The tumultuous heart of the Large Magellanic Cloud

10 hours ago

A scene of jagged fiery peaks, turbulent magma-like clouds and fiercely hot bursts of bright light. Although this may be reminiscent of a raging fire or the heart of a volcano, it actually shows a cold cosmic ...

Total lunar eclipse before dawn on April 4th

10 hours ago

An unusually brief total eclipse of the Moon will be visible before dawn this Saturday, April 4th, from western North America. The eclipse happens on Saturday evening for Australia and East Asia.

Cassini: Return to Rhea

23 hours ago

After a couple of years in high-inclination orbits that limited its ability to encounter Saturn's moons, NASA's Cassini spacecraft returned to Saturn's equatorial plane in March 2015.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.