Update on the leak on ISS, its cause and repair
Link here. The article provides a lot of good details, including the contingency plans should the Soyuz itself be unsafe for astronauts to use to return to Earth. As for the repairs:
Shortly after finding the hole, the crew took photos for ground crews to review. At the same time, the Russian crewmembers used Kapton tape to temporarily seal the breach/leak – a band-aid until a more permanent solution was found and a temporary fix that at first only slowed the leak rate.
After the tape was applied, reports varied regarding ISS pressure – with some reports from the crew noting a stabilization of pressure inside the international complex and others continuing to show a slower leak.
Within hours, the Russians had devised a permanent fix using sealant, tape, and medical patches.
There was some initial disagreement among the crew (as well as between NASA and Roscosmos) in terms of implementing the permanent fix so quickly, with ISS Commander Drew Feustel (NASA) wanting to hold off on the permanent fix until the ground could review the idea while Roscosmos wanted to proceed with the sealant/patch/tape fix immediately.
Ultimately, Roscosmos and the Russian crew proceeded with the fix.
The sealant – as of writing – appears to have worked and stopped the leak completely. However, application of the final aspects of the repair (the application of patches and tape) have been left until tomorrow to allow the sealant of fully set and harden during the crew’s “overnight” sleep period.
The disagreement about when to do the final repair probably revolves around a desire of NASA to pinpoint the exact cause of the holes, including the possibility that it was caused by a fundamental problem with the manufacture of the Soyuz itself. The Russians in turn don’t like air leaks (having lost three astronauts from one at the end of the Salyut 1 space station mission in 1971), and would also not like outsiders to be uncovering a problem with the Soyuz capsule, unlikely here as that is.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
Link here. The article provides a lot of good details, including the contingency plans should the Soyuz itself be unsafe for astronauts to use to return to Earth. As for the repairs:
Shortly after finding the hole, the crew took photos for ground crews to review. At the same time, the Russian crewmembers used Kapton tape to temporarily seal the breach/leak – a band-aid until a more permanent solution was found and a temporary fix that at first only slowed the leak rate.
After the tape was applied, reports varied regarding ISS pressure – with some reports from the crew noting a stabilization of pressure inside the international complex and others continuing to show a slower leak.
Within hours, the Russians had devised a permanent fix using sealant, tape, and medical patches.
There was some initial disagreement among the crew (as well as between NASA and Roscosmos) in terms of implementing the permanent fix so quickly, with ISS Commander Drew Feustel (NASA) wanting to hold off on the permanent fix until the ground could review the idea while Roscosmos wanted to proceed with the sealant/patch/tape fix immediately.
Ultimately, Roscosmos and the Russian crew proceeded with the fix.
The sealant – as of writing – appears to have worked and stopped the leak completely. However, application of the final aspects of the repair (the application of patches and tape) have been left until tomorrow to allow the sealant of fully set and harden during the crew’s “overnight” sleep period.
The disagreement about when to do the final repair probably revolves around a desire of NASA to pinpoint the exact cause of the holes, including the possibility that it was caused by a fundamental problem with the manufacture of the Soyuz itself. The Russians in turn don’t like air leaks (having lost three astronauts from one at the end of the Salyut 1 space station mission in 1971), and would also not like outsiders to be uncovering a problem with the Soyuz capsule, unlikely here as that is.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News