NASA plans to conduct a cryogenic demonstration test by loading cold liquid hydrogen and liquid oxygen into the Space Launch System (SLS) before launch.
NASA is preparing to launch Artemis 1 on September 27. However, the US space agency will conduct a cryogenic test of Artemis 1 prior to launch to confirm that the fuel leak has been resolved. The fuel test of its Artemis 1 moon rocket will be conducted on Wednesday, September 21. Teams will test on Sept. 21 to add supercooled fuel to the #Artemis I rocket to confirm repairs to an interface for this orbital flight test. @NASAArtemis leaders will preview the test during a teleconference on Sept. September at 11:30 a.m. ET (15:30 UTC): https://go.nasa.gov/3eQf3fL,” NASA tweeted.
The US space agency had to end the mission because of the leakage of liquid hydrogen while refueling the rocket engine tanks. As shared by Space.com, “Technicians replaced two seals at the quick-disconnect earlier this month, which may have solved the problem.” and now the NASA Artemis 1 team will load super-cold propellant — liquid hydrogen and liquid oxygen — into the SLS on Launch Pad 39B at NASA’s Kennedy Space Center in Florida to conduct the test.
Earlier, Eric Berger of Ars Technica explained that the US space agency has a tolerance for a small amount of hydrogen leakage and that anything above a hydrogen concentration of more than 4 percent near the “quick connector” is considered a flammability hazard.
According to the report, the NASA Artemis spacecraft has an 8-inch diameter line that carries liquid hydrogen into the rocket and “caused a persistent leak at the inlet, known as a shortcut, that led aboard the vehicle.”
NASA’s Artemis lunar program will use a Space Launch System (SLS) mega rocket to send an Orion capsule to explore the lunar orbit. Initially, Artemis 1 was supposed to launch on August 29, but the planned launch was canceled twice due to a technical malfunction.