NASA reorganization spacewalk plan after equipment disappointment
NASA will delay the rest of a continuous arrangement of spacewalks at the International Space Station to overhaul batteries for its capacity framework after a related segment failed and should be supplanted.
NASA reported Oct. 15 that the third in a progression of battery substitution spacewalks that had been booked for Oct. 16, highlighting NASA space travelers Jessica Meir and Andrew Morgan, had been delayed after a gadget called a battery charge/release unit, or BCDU, flopped on the station throughout the end of the week. The gadget is utilized to charge the batteries as a major aspect of the station’s capacity supply.
Rather, NASA will complete a spacewalk Oct. 18 to supplant the fizzled BCDU unit with an extra on the station. Meir and Christina Koch will play out that spacewalk. The two had been planned to play out an Oct. 21 spacewalk to supplant batteries, the primary all-female NASA spacewalk.
During a media video chat Oct. 15, Megan McArthur, vice president of the NASA space explorer office, said NASA chose to have Koch and Meir direct the spacewalk to adjust outstanding burdens for the team, given the quantity of up and coming spacewalks anticipated to happen in the coming weeks. “With the substance of the EVA and adjusting of the general remaining task at hand, it appeared well and good for us to cause the team for this to spacewalk this week Christina Koch and Jessica Meir,” she said.
Notwithstanding supplanting the BCDU, Koch and Meir will perform two different errands outside the station, said Kenny Todd, director of ISS tasks and mix. The two will move some multi-layer protection around other battery charger units, and after that introduce equipment on the Columbus module to help a future outer trial stage.
In a meeting here during a media occasion for Sierra Nevada Corporation’s Dream Chaser load vehicle, Kirk Shireman, NASA ISS program chief, said the BCDU units were killed before an Oct. 11 spacewalk to supplant batteries, yet generally not contacted. Three such units were turned off for the spacewalk, and two walked out on regularly thereafter. The third, however, neglected to turn on.
“We accept the battery is fine,” he stated, however without a working BCDU, that power channel currently delivers just 66% of its appraised power. That prompted the choice to complete a spacewalk to supplant the charging unit.
Shireman said that NASA doesn’t plan to promptly resume spacewalks to finish the battery substitution work, an assignment the office expected to take five spacewalks. “We’re going to remain down, presumably for half a month,” he stated, to decide whether the BCDU disappointment was brought about by something done during the battery substitution process. “We don’t accept that is the situation, yet we need to go take some time and take a gander at all the information.”
Todd said there’s “some degree of concern” in light of the fact that another BCDU flopped not long ago during another battery swap. That unit was in an area that enabled the station’s automated arm to supplant it, a choice not accessible here since the bombed unit is toward the finish of the station’s support.
There are 24 BCDUs on the station, with three or four extras on the station and none on the ground. “There will be a great deal of accentuation in the close to term on attempting to comprehend what operationally we may have the option to do to moderate any worries with introducing these new batteries,” Todd said.
The planning of the rest of the battery substitution spacewalks, including what number of more will be required, will likewise depend the capacity to keep a portable work stage by the site with gear required for the battery substitution. “There are a few ramifications of forgetting about it there” that are as yet being contemplated, Shireman said. NASA had intended to finish the spacewalks Oct. 25.
The battery substitution spacewalks were only the beginning of an extreme time of movement outside the station. Later this fall Morgan and Luca Parmitano will do an extra arrangement of five spacewalks to supplant coolant siphons on the Alpha Magnetic Spectrometer (AMS) instrument on the station. That exertion is entangled by the way that the AMS was not intended for in-space fixes, requiring unique preparing for the space travelers.
Other than the battery substitution and AMS fix spacewalks, Russian cosmonauts Alexander Skvortsov and Oleg Skripochka are planned to do a spacewalk Oct. 31 on the station’s Russian fragment.