Bubble of poisonous coolant abruptly ends Russian ISS spacewalk

A bubble of coolant leaked out of a radiator connected to the Worldwide Area Station (ISS), jeopardizing an ongoing spacewalk by two Russian cosmonauts on Wednesday.

Cosmonauts Oleg Kononenko and Nikolai Chub exited the ISS and commenced their spacewalk at 1:49 p.m. ET. Through the almost eight hour spacewalk, the pair had been inspecting a leak on a backup radiator on Russia’s Nauka laboratory module when residual coolant spewed out of the leak web site, NASA wrote in a weblog submit.

The spacewalking cosmonauts had been advised to depart the world instantly out of worry for his or her security, though NASA later revealed that the coolant didn’t get onto their fits. Earlier than reentering via the Poisk airlock, the cosmonauts wiped down their fits and instruments “to search for indicators of coolant and wipe off any coolant as crucial,” NASA wrote.

“The cosmonauts additionally wiped down their fits and instruments as normal after repressurization to additional cut back the introduction of hint contaminants into the area station atmosphere,” the area company added. “Extra filtration will then be used contained in the area station in an effort to shortly scrub the ambiance of any remaining traces of contaminant.”

On October 9, flight controllers at NASA’s mission management observed that the backup radiator on Russia’s Nauka module was leaking coolant into low Earth orbit. Though the primary radiator was nonetheless working usually and didn’t disrupt ISS operations, the leak resulted within the delay of two NASA spacewalks as engineers reviewed the info of the incident.

Throughout Wednesday’s spacewalk, the cosmonauts put in an artificial radar communications system and launched a nanosatellite to check photo voltaic sail expertise. The 2 cosmonauts had been additionally alleged to isolate the leaking radiator however they weren’t capable of as a result of bubble of leaking coolant that spilled out of it.

The backup radiator was delivered to the ISS in 2010 and transferred to the Nauka module throughout a Roscosmos spacewalk in April. The module itself was added to the ISS in July 2021.

That is the third time a leak has sprung from Russian {hardware} connected to the ISS. In December 2022, floor groups noticed a fountain of particles pouring out from a Soyuz spacecraft docked to the ISS. On the time, Russia attributed the primary leak to a micrometeorite strike on the spacecraft. Shortly after, nevertheless, a Russian Progress 82 freighter docked to the ISS additionally started leaking coolant in February. Russia’s area company once more claimed that it was brought on by an exterior influence, however now with the third incident, it’s arduous to not query the integrity of the {hardware} itself.

To date, NASA is claiming that it’s enterprise as normal on board the ISS. One among its delayed spacewalks was rescheduled to October 30, and NASA astronauts Loral O’Hara and Jasmin Moghbeli are nonetheless set to enterprise outdoors the area station regardless of the cosmonauts’ spacewalk mishap.

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