{"id":466807,"date":"2023-07-25T14:09:31","date_gmt":"2023-07-25T18:09:31","guid":{"rendered":"https:\/\/www.nasa.gov\/?p=466807"},"modified":"2023-07-26T14:30:05","modified_gmt":"2023-07-26T18:30:05","slug":"space-station-crew-removes-ammonia-pump-next-spacewalk-set-for-tuesday","status":"publish","type":"post","link":"https:\/\/www.nasa.gov\/missions\/station\/space-station-crew-removes-ammonia-pump-next-spacewalk-set-for-tuesday\/","title":{"rendered":"Space Station Crew Removes Ammonia Pump; Next Spacewalk Set for Tuesday"},"content":{"rendered":"<div id=\"\" class=\"hds-media hds-module wp-block-image\"><div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\"><div class=\"hds-media-wrapper margin-left-auto margin-right-auto\"><figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><a href=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013a.jpg\"><img fetchpriority=\"high\" decoding=\"async\" width=\"926\" height=\"690\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013a.jpg?w=926\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"Spacewalker Mike Hopkins rides the Canadarm2 robotic arm carrying the ammonia pump module to the Starboard 1 truss worksite.\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013a.jpg 926w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013a.jpg?resize=300,224 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013a.jpg?resize=768,572 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013a.jpg?resize=400,298 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013a.jpg?resize=600,447 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013a.jpg?resize=900,671 900w\" sizes=\"(max-width: 926px) 100vw, 926px\" loading=\"eager\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\"><div class=\"hds-caption-text p-sm margin-0\">Spacewalker Mike Hopkins rides the Canadarm2 robotic arm carrying the ammonia pump module to the Starboard 1 truss worksite.<\/div><div class=\"hds-credits\">NASA TV<\/div><\/figcaption><\/div><\/div><\/div>\n\n\n<p>Expedition 38 Flight Engineers Rick Mastracchio and Mike Hopkins wrapped up a 5-hour, 28-minute spacewalk outside the International Space Station at 12:29 p.m. EST Saturday, completing the first in a series of excursions aimed at replacing a degraded ammonia pump module associated with one of the station’s two external cooling loops that keeps both internal and external equipment cool.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"NASA Begins Series of Spacewalks to Fix Coolant Pump on ISS\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Qx2WDr-lmJc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\">Expedition 38 astronauts Rick Mastracchio and Mike Hopkins ventured outside the space station on Dec. 21, for the first in a series of spacewalks to remove and replace a faulty coolant pump module. The pump is associated with one of the station’s two external cooling loops, which circulate ammonia outside the station to keep both internal and external equipment cool.<\/figcaption><\/figure>\n\n\n\n<p>A second spacewalk to install a replacement pump module, originally planned for Monday, is now scheduled for Tuesday.<br><br>The extra day will allow time for the crew to resize a spare spacesuit on the space station for use by Mastracchio. During repressurization of the station’s airlock following the spacewalk, a spacesuit configuration issue put the suit Mastracchio was wearing in question for the next excursion.– specifically whether water entered into the suit’s sublimator inside the airlock. The flight control team at NASA’s Johnson Space Center in Houston decided to switch to a backup suit for the next spacewalk.<br><br>This issue is not related to the spacesuit water leak that was seen during a July spacewalk by European Space Agency astronaut Luca Parmitano and NASA’s Chris Cassidy. Both Mastracchio and Hopkins reported dry conditions repeatedly throughout Saturday’s activities and the two were never in danger.<br><br>NASA Television coverage of Tuesday’s spacewalk will begin at 6:15 a.m. EST. The spacewalk scheduled to begin at 7:10 a.m.<\/p>\n\n\n\n<p>During Saturday\u2019s spacewalk, the two astronauts focused on removing a degraded pump module from Loop A of the station\u2019s external Active Thermal Control System. That pump module encountered a problem Dec. 11 when an internal valve stuck in an incorrect position, causing temperatures in the station\u2019s cooling lines to drop.<\/p>\n\n\n<div id=\"\" class=\"hds-media hds-module wp-block-image\"><div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\"><div class=\"hds-media-wrapper margin-left-auto margin-right-auto\"><figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><a href=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013b.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"320\" height=\"258\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013b.jpg?w=320\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"Astronaut Rick Mastracchio works outside the International Space Station during the first of a series of spacewalks to replace a degraded ammonia pump module.\" style=\"transform: scale(1); transform-origin: 54% 0%; object-position: 54% 0%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013b.jpg 320w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013b.jpg?resize=300,242 300w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\"><div class=\"hds-caption-text p-sm margin-0\">Astronaut Rick Mastracchio works outside the International Space Station during the first of a series of spacewalks to replace a degraded ammonia pump module.<\/div><div class=\"hds-credits\">NASA TV<\/div><\/figcaption><\/div><\/div><\/div>\n\n\n<p>After exiting the Quest airlock Saturday, Hopkins made his way out to the worksite at center of the Starboard 1 truss segment. Mastracchio meanwhile attached himself to a foot restraint at the end of the station\u2019s 57-foot robotic arm so that Flight Engineer Koichi Wakata, the robotics operator for the spacewalks, could fly Mastracchio to the worksite and position him for his various tasks.<\/p>\n\n\n\n<p>The two spacewalkers first spent some time demating four ammonia fluid line \u201cquick disconnects\u201d from the pump module.<\/p>\n\n\n\n<p>Once the four fluid lines were disconnected, Mastracchio and Hopkins worked to attach the fluid lines to a pump module jumper box, which allows the ammonia to reach the system\u2019s plumbing in the ammonia and nitrogen tanks to keep it in a liquid state.<\/p>\n\n\n\n<p>Afterward the spacewalkers installed a generic thermal cover over the pump module jumper and ammonia fluid lines.<\/p>\n\n\n<div id=\"\" class=\"hds-media hds-module wp-block-image\"><div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\"><div class=\"hds-media-wrapper margin-left-auto margin-right-auto\"><figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><a href=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013c.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"320\" height=\"241\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013c.jpg?w=320\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"Spacewalker Rick Mastracchio works to disconnect the fluid lines from the degraded pump module in this view from the NASA astronaut's helmet camera.\" style=\"transform: scale(1); transform-origin: 67% 100%; object-position: 67% 100%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013c.jpg 320w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/07\/pic-122013c.jpg?resize=300,226 300w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\"><div class=\"hds-caption-text p-sm margin-0\">Spacewalker Rick Mastracchio works to disconnect the fluid lines from the degraded pump module in this view from the NASA astronaut’s helmet camera.<\/div><div class=\"hds-credits\">NASA TV<\/div><\/figcaption><\/div><\/div><\/div>\n\n\n<p>With the spacewalk proceeding well ahead of schedule, Mission Control in Houston informed Mastracchio and Hopkins that they could press ahead with the first task originally planned for Monday\u2019s spacewalk \u2013removing the degraded pump module from the starboard truss and attaching it to a stowage location on the Payload Orbital Replacement Unit Accommodation (POA) on the station\u2019s railcar, or Mobile Base System.<\/p>\n\n\n\n<p>While Hopkins set up the POA and an adjustable grapple fixture, Mastracchio removed the five electrical connectors from the pump module and unfastened the module from the truss.   <\/p>\n\n\n\n<p>With Mastracchio holding the 780-pound pump while he was attached to the end of the robotic arm, Wakata guided the arm to attach the module to the grapple fixture and activated the snares to hold it in place.<\/p>\n\n\n\n<p>Mastracchio now holds 43 hours and 58 minutes of spacewalking time during seven spacewalks, and Hopkins now holds 5 hours and 28 minutes during one spacewalk.<\/p>\n\n\n\n<p>Saturday\u2019s spacewalk was the 175th in support of space station assembly and maintenance.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Expedition 38 Flight Engineers Rick Mastracchio and Mike Hopkins wrapped up a 5-hour, 28-minute spacewalk outside the International Space Station at 12:29 p.m. EST Saturday, completing the first in a series of excursions aimed at replacing a degraded ammonia pump module associated with one of the station’s two external cooling loops that keeps both internal [...]<\/p>\n","protected":false},"author":133,"featured_media":467062,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nasa_hds_core_meta_l10n":"en-US","nasa_hds_core_meta_article_editor":"","nasa_hds_core_meta_article_contacts":[],"nasa_hds_core_meta_article_topic":"","nasa_hds_core_meta_linked_locations":[],"nasa_hds_core_meta_article_related_articles":[],"hds_migrate_meta_pr_release_id":"","hds_migrate_meta_pr_release_type":"","nasa_hds_core_meta_location_x":"","nasa_hds_core_meta_location_y":"","nasa_hds_core_meta_gallery_images":[],"footnotes":""},"categories":[3151,2735],"news-tags":[],"internal-terms":[],"coauthors":[10248],"parsely":{"version":"1.1.0","meta":{"@context":"https:\/\/schema.org","@type":"NewsArticle","headline":"Space Station Crew Removes Ammonia Pump; 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