{"id":125731,"date":"2024-11-14T12:10:59","date_gmt":"2024-11-14T05:10:59","guid":{"rendered":"https:\/\/hotvideos24.online\/?p=125731"},"modified":"2024-11-14T12:10:59","modified_gmt":"2024-11-14T05:10:59","slug":"nasa-and-roscosmos-disagree-on-cause-and-severity-of-iss-air-leak","status":"publish","type":"post","link":"https:\/\/hotvideos24.online\/?p=125731","title":{"rendered":"NASA and Roscosmos disagree on cause and severity of ISS air leak"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<\/p>\n<div>\n<p>WASHINGTON \u2014 NASA and Roscosmos continue to disagree on the cause and severity of an air leak in the Russian segment of the International Space Station, one that NASA worries could lead to a \u201ccatastrophic failure\u201d of part of a Russian module.<\/p>\n<p>That disagreement was brought to light during a brief meeting of NASA\u2019s ISS Advisory Committee Nov. 13, which recounted a meeting of that committee with its Roscosmos counterpart in Moscow in September to discuss issues with the station.<\/p>\n<p>The major concern has been a small but persistent leak in a vestibule of the Zvezda service module called PrK that separates a docking port from the rest of the module. That leak has existed for several years, and station crews have dealt with the leak by sealing off PrK from the rest of the station when they do not need access to Progress cargo spacecraft docked to the port.<\/p>\n<p>\u201cAlthough the teams continue to investigate the causal factors for the crack initiation and growth, the U.S. and Russian technical teams don\u2019t have a common understanding of what the likely root cause is or the severity of the consequences of these leaks,\u201d said Bob Cabana, a former NASA astronaut and associate administrator who now chairs the committee.<\/p>\n<p>He said Russian engineers believe the cracks are likely caused by \u201chigh cyclic fatigue\u201d from micro-vibrations. NASA, by contrast, believes several factors are at play, including pressure and mechanical stress, residual stress, material properties of the module and environmental exposure.<\/p>\n<p>In September, a report by NASA\u2019s Office of Inspector General (OIG) said \u201cboth agencies have narrowed their focus to internal and external welds\u201d as a cause of the leaks, which have not been seen elsewhere in the station.<\/p>\n<p>At a Sept. 27 briefing, <a href=\"https:\/\/spacenews.com\/nasa-cites-progress-in-reducing-iss-air-leak\/\">NASA officials downplayed the concerns about the leaks<\/a>, which were first detected in 2019 but earlier this year had grown to their highest rates seen to date, a loss of 1.7 kilograms of air per day, the OIG report stated. At that briefing, agency officials said recent repair work reduced the leak rate by a third.<\/p>\n<p>The leaks, though, remain a cause for concern for the agencies as well as space station crews. At a Nov. 8 briefing, Michael Barratt, a NASA astronaut who returned to Earth in October on the Crew-8 mission after nearly eight months on the station, said his Russian counterparts have been \u201cvery open\u201d about the issue but that NASA takes precautions when the hatch to PrK is open.<\/p>\n<p>\u201cWe\u2019ve taken a very conservative approach to close a hatch between the U.S. side and the Russian side during those time periods,\u201d he said. \u201cIt\u2019s not a comfortable thing but it is the best agreement between all the smart people on both sides, and it\u2019s something that we as a crew live with.\u201d<\/p>\n<p>Cabana said at the committee meeting that there is also no agreement between NASA and Roscosmos on the severity of the issue. \u201cWhile the Russian team continues to search for and seal the leaks, it does not believe catastrophic disintegration of the PrK is realistic,\u201d he said. \u201cNASA has expressed concerns about the structural integrity of the PrK and the possibility of a catastrophic failure.\u201d<\/p>\n<p>\u201cThe Russians believe that continued operations are safe but they can\u2019t prove to our satisfaction that they are, and the U.S. believes that it\u2019s not safe but we can\u2019t prove to the Russians\u2019 satisfaction that that\u2019s the case,\u201d he concluded.<\/p>\n<p>Cabana said the NASA and Roscosmos committee made a joint recommendation to their agencies\u2019 leaders that they would continue to seek a \u201ccommon understanding of the structural integrity\u201d of PrK and bring in outside experts from academia and industry to support those efforts.<\/p>\n<p>He offered no timetable for those efforts, but said NASA has brought in an independent team to assess the leaks. \u201cThis is an engineering problem, and good engineers should be able to reach a solution and agree on it.\u201d<\/p>\n<p>\u201cThe station is not young. It\u2019s been up there for quite a while. You expect some wear and tear, and we\u2019re seeing that,\u201d Barratt said at the Crew-8 briefing.<\/p>\n<p>The PrK leak was the primary topic of the meeting, which lasted only about 10 minutes even though the <a href=\"https:\/\/www.federalregister.gov\/documents\/2024\/10\/25\/2024-24769\/international-space-station-advisory-committee\">Federal Register notice<\/a> for the meeting projected it would last an hour. The meeting was the first public meeting by the committee since March 2020, when the committee was chaired by former astronaut Tom Stafford, who passed away this March.<\/p>\n<p><h3 class=\"jp-relatedposts-headline\"><em>Related<\/em><\/h3>\n<\/p><\/div>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<br \/><div data-type=\"_mgwidget\" data-widget-id=\"1660802\">\r\n<\/div>\r\n<script>(function(w,q){w[q]=w[q]||[];w[q].push([\"_mgc.load\"])})(window,\"_mgq\");\r\n<\/script>\r\n<br \/>\n<br \/><a href=\"https:\/\/spacenews.com\/nasa-and-roscosmos-disagree-on-cause-and-severity-of-iss-air-leak\/\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>WASHINGTON \u2014 NASA and Roscosmos continue to disagree on the cause and severity of an air leak in the Russian segment of the International Space Station, one that NASA worries &hellip; <a href=\"https:\/\/hotvideos24.online\/?p=125731\" class=\"more-link\">Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8628],"tags":[],"class_list":["post-125731","post","type-post","status-publish","format-standard","hentry","category-science","entry"],"_links":{"self":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/125731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=125731"}],"version-history":[{"count":0,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/125731\/revisions"}],"wp:attachment":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=125731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=125731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=125731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}