NASA cancels spacewalk due to this massive leak; Details inside |

NASA’s meticulous planning for spacewalks, a crucial aspect of International Space Station (ISS) maintenance, faced an unexpected setback when a significant water leak in an astronaut’s spacesuit led to the cancellation of the extravehicular activity (EVA). The incident occurred on June 24, 2024, just as astronauts Tracy Dyson and Mike Barratt were preparing to venture outside the ISS to perform critical tasks.
The spacewalk, initially scheduled for nearly seven hours, was abruptly called off when Dyson reported a leak from her spacesuit’s cooling system. This malfunction occurred shortly after the astronauts switched their suits to battery power, a standard procedure marking the beginning of a spacewalk. Barratt reported “water everywhere,” indicating the severity of the leak, which posed a risk to the safety of the astronauts and the success of the mission.
The planned EVA involved removing a faulty communications box and collecting microbe samples from the station’s exterior. These operations are vital for the continued functionality and scientific output of the ISS. However, the safety of the crew takes precedence over all other considerations. The decision to cancel the spacewalk was made swiftly by Mission Control, demonstrating NASA’s commitment to the well-being of its astronauts.
This is not the first time spacesuit issues have disrupted planned EVAs. Earlier in the month, another spacewalk was postponed due to “spacesuit discomfort” experienced by another astronaut. The complexity and precision required for spacewalks mean that even minor issues can have significant implications, necessitating the utmost caution.
The leak was traced to a servicing and cooling umbilical (SCU) on Dyson’s suit. The SCU is designed to connect to the ISS airlock, supplying power, oxygen, and cooling to the suit while the astronauts prepare for their EVA. The malfunction led to the formation of ice crystals and a “snowstorm” of sorts within the airlock, as described by Dyson to Mission Control. The astronauts were still inside the hatch with the external door open when the leak occurred, and they promptly closed it after the spacewalk was terminated.

ISS

Representative image of the ISS

The cancellation of the spacewalk, which lasted only 31 minutes from the time the suits switched to internal power until the repressurization of the crew airlock, added to Dyson’s total EVA time of 23 hours and 20 minutes across four spacewalks, and Barratt’s total time of 5 hours and 37 minutes across three EVAs. The incident highlighted the unpredictable nature of space exploration and the challenges faced by astronauts working in the harsh environment of space.
NASA’s response to the incident was measured and transparent, with officials providing updates and assurances that the astronauts were not in danger. The agency’s ISS blog and subsequent briefings are expected to offer additional information on the incident and the measures being taken to prevent future occurrences.
The next spacewalk, scheduled for July 2, remains uncertain as NASA evaluates the situation. The agency’s ability to adapt and respond to such challenges is a critical component of its continued success in space exploration. The incident serves as a reminder of the inherent risks of space travel and the importance of rigorous safety protocols. As NASA investigates the cause of the leak and works to ensure the reliability of its equipment, the dedication and resilience of the astronauts and ground teams continue to inspire and drive humanity’s presence in space.

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