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Rocket failure could prompt evacuation of space station

New crew on hold as Russians seek clues to accident

By Marcia Dunn
Associated Press / August 30, 2011

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CAPE CANAVERAL, Fla. - Astronauts might need to take the unprecedented step of temporarily abandoning the International Space Station if last week’s Russian launch accident prevents new crews from flying there this fall.

Until officials figure out what went wrong with Russia’s essential Soyuz rockets, there will be no way to launch any more astronauts before the current residents have to leave in mid-November.

The unsettling predicament comes just weeks after NASA’s final space shuttle flight.

“We have plenty of options,’’ NASA’s space station program manager, Mike Suffredini, assured reporters yesterday. “We’ll focus on crew safety as we always do.’’

Abandoning the space station through two capsules docked at the station would be an unpleasant last resort for the world’s five space agencies, which spent decades working on the project. Astronauts have been living aboard the space station since 2000, and the goal is to keep it going until 2020.

Suffredini said flight controllers could keep a deserted space station operating indefinitely, as long as all major systems are working properly. The risk to the station goes up, however, if no one is on board to fix equipment breakdowns.

Six astronauts from three countries are living on the orbiting complex. Three are due to leave next month; the other three are supposed to check out in mid-November.

The Sept. 22 launch of the next crew - the first to fly in this post-shuttle era - already has been delayed indefinitely. Russia’s Soyuz vehicles have been the sole means of getting full-time station residents up and down for two years.

To keep the orbiting outpost with a full staff of six for as long as possible, the one American and two Russians due to return to Earth on Sept. 8 will remain on board at least an extra week.

As for supplies, the space station is well stocked and could go until next summer, Suffredini said. Atlantis dropped off a year’s supply of goods last month on the final space shuttle voyage.

The unmanned craft destroyed Wednesday was carrying three tons of supplies.

For now, operations are normal in orbit, Suffredini noted, and the additional week on board for half the crew will mean additional science research.

The Soyuz has been extremely reliable over the decades; this was the first failure in 44 Russian supply hauls for the space station. Even with such a good track record, many in and outside NASA were concerned about retiring the space shuttles before a replacement was ready to fly astronauts.

Russian space officials have set up an investigation team and until it determines a cause for the accident and a repair plan, the launch and landing schedules remain in question. None of the spacecraft debris has been recovered; the wreckage fell into a remote, wooded section of Siberia. The third stage had malfunctioned and a sudden loss of pressure apparently was noted between the engine and turbopump.

While a crew may have survived such an accident because of safety precautions built into the manned version of the rocket, no one wants to take any chances.

One or two unmanned Soyuz launches are on tap for October, including another space station supply run. Those would serve as important test flights before putting humans on board, Suffredini said.

NASA considered vacating the space station before, following the space shuttle Columbia disaster in 2003. Back then, shuttles were still being used to ferry some station residents back and forth. Instead, the station got by with two-man crews for three years because of the significant cutback in supplies.

The space station’s population increased in 2009 to six. It wasn’t until the space station was completed this year that science research finally took priority.

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