{"id":11306,"date":"2022-09-04T00:50:24","date_gmt":"2022-09-03T16:50:24","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/hydrogen-leak-delays-moonshot-by-at-least-several-weeks\/"},"modified":"2022-09-04T00:50:24","modified_gmt":"2022-09-03T16:50:24","slug":"hydrogen-leak-delays-moonshot-by-at-least-several-weeks","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/hydrogen-leak-delays-moonshot-by-at-least-several-weeks\/","title":{"rendered":"Hydrogen leak delays moonshot by at least several weeks"},"content":{"rendered":"

STORY WRITTEN FOR CBS NEWS & USED WITH PERMISSION<\/p>\n

\"\"
NASA\u2019s Space Launch System moon rocket on Launch Complex 39B on Saturday, following a scrubbed launch attempt due to a hydrogen leak. Credit: NASA<\/figcaption><\/figure>\n

NASA\u2019s star-crossed Space Launch System moon rocket was grounded for the second time in five days Saturday, this time by a large hydrogen leak in a fuel line quick-disconnect fitting that will delay the $4.1 billion booster\u2019s maiden flight by several weeks, likely into October.<\/p>\n

The latest delay was a frustrating disappointment to the Kennedy Space Center work force, invited guests and thousands of area residents and tourists who lined area roads and beaches to watch NASA\u2019s most powerful rocket blast off, raising the curtain on the agency\u2019s Artemis moon program.<\/p>\n

But faced with a large hydrogen leak and without enough time to make repairs before the current lunar launch period ends Tuesday, NASA managers had little choice but to order a delay.<\/p>\n

Engineers are assessing two options to fix the latest problem: replace components in the suspect fitting at the launch pad and carry out a mini fueling test with liquid hydrogen to verify leak-free performance. Or roll the rocket back to the Vehicle Assembly Building and carry out repairs there.<\/p>\n

While the VAB would provide shelter from the weather and would not require assembly of an environment enclosure to protect sensitive components during the repair work, engineers would not be able to test the fitting with cryogenic hydrogen. And that\u2019s when leaks are most likely to show up.<\/p>\n

Either option means a multi-week launch delay. The next lunar launch period starts September 19 and runs through October 4. But NASA is scheduled to send a fresh crew to the International Space Station aboard a SpaceX capsule on October 3 and the agency wants to avoid a launch conflict.<\/p>\n

That means the SLS launch likely will slip into the next launch period, which opens October 17 and runs through Halloween, unless a solution can be found to speed up the repair work.<\/p>\n

\u201cThis is an incredibly hard business,\u201d said Artemis 1 mission manager Mike Sarafin. \u201cOur focus is on understanding the problem. \u2026 We\u2019ll follow up next week when we have those options flushed out further.\u201d<\/p>\n

During Saturday\u2019s countdown, engineers made three attempts to properly \u201cseat\u201d a suspect seal and stop a leak in the 8-inch quick-disconnect fitting, but none of them worked. After a \u201cno-go\u201d recommendation from the engineers working the problem, Launch Director Charlie Blackwell-Thompson called off the countdown at 11:17 a.m. EDT.<\/p>\n

\u201cWe\u2019ll go when it\u2019s ready,\u201d said NASA Administrator Bill Nelson. \u201cWe don\u2019t go until then, especially now, on a test flight.\u201d<\/p>\n

\"\"
The launch dates and windows for Launch Period 26 for the Artemis 1 mission, opening Sept. 19 and closing Oct. 4. Credit: NASA \/ Spaceflight Now<\/figcaption><\/figure>\n

It\u2019s not yet clear what caused the leak, but Sarafin said a valve was inadvertently cycled during the initial moments of the fuel loading operation, briefly over pressurizing the lines and the quick-disconnect fitting.<\/p>\n

\u201cThere was an inadvertent pressurization of the hydrogen transfer line that exceeded what we had planned, which was about 20 pounds per square inch,\u201d he said. \u201cIt got up to about 60 pounds per square inch. The flight hardware itself, we know it is fine, we did not exceed the maximum design pressure.<\/p>\n

\u201cBut there\u2019s a chance that the soft goods, or the seal in the eight-inch quick disconnect saw some effects from that, but it\u2019s too early to tell. \u2026 What we do know is that we saw a large leak.\u201d<\/p>\n

The goal of the Artemis 1 mission is to boost an unpiloted Orion capsule into a distant orbit around the moon, testing the spacecraft in the deep space environment before returning it to Earth for a high-speed, high-temperature re-entry.<\/p>\n

If the initial uncrewed test flight goes well, NASA plans to launch four astronauts on an around-the-moon shakedown flight \u2014 Artemis 2 \u2014 in 2024 and to land the first woman and next man near the moon\u2019s south pole the 2025-26 timeframe. But all of that hinges on a successful Artemis 1 test flight.<\/p>\n

The long-awaited mission must take off during specific launch periods based on the constantly changing positions of the Earth and moon, the desired lunar orbit for the Orion spacecraft and the power of the SLS rocket to put it on the proper trajectory.<\/p>\n

\"\"
The launch dates and windows for Launch Period 27 for the Artemis 1 mission, opening Oct. 17 and closing Oct. 31. Credit: NASA \/ Spaceflight Now<\/figcaption><\/figure>\n

Complicating the planning, flight planners want to avoid putting the solar-powered spacecraft in the moon\u2019s shadow for extended periods and they want to ensure a daylight splashdown.<\/p>\n

The current launch window closes Tuesday, the same day certification of batteries in the rocket\u2019s self-destruct system expires. That alone would have required roll back to the Vehicle Assembly Building for already-planned servicing because the batteries cannot be accessed at the launch pad.<\/p>\n

NASA attempted to launch the SLS rocket on its maiden flight Monday after four countdown rehearsals and fueling tests, all of which ran into multiple technical snags, including hydrogen leaks in different systems.<\/p>\n

During Monday\u2019s launch attempt, a faulty temperature sensor led to uncertainty as to whether the SLS rocket\u2019s four RS-25 first stage engines were receiving the proper pre-launch cooling.<\/p>\n

In addition, the same fitting that leaked Saturday also leaked during the Monday launch try, but concentrations were much lower and engineers managed get the hydrogen tank filed before the enging cooling issue cropped up.<\/p>\n

As it turned out, the engines were, in fact, being properly chilled and a faulty temperature sensor was responsible for misleading engineers.<\/p>\n","protected":false},"excerpt":{"rendered":"

STORY WRITTEN FOR CBS NEWS & USED WITH PERMISSION NASA\u2019s Space Launch System moon rocket on Launch Complex 39B on Saturday, following a scrubbed launch attempt due to a hydrogen leak. Credit: NASA NASA\u2019s star-crossed Space Launch System moon rocket was grounded for the second time in five days Saturday, this time by a large hydrogen leak […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[],"class_list":["post-11306","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/11306"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=11306"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/11306\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=11306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=11306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=11306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}