The International Space Station (ISS) experienced an air leak in its Zvezda module, first detected in 2019.

The leak in the Zvezda module's intermediate chamber was caused by a crack.

The crack was initially blamed on a meteorite, but was later found to be a manufacturing defect.

A tea bag was used to detect and locate the air leak.

The leak, located in the living module, did not pose a serious threat to the crew's safety.

Russian cosmonauts filled the hole with sealant, but it dried out and failed.

A special committee identified the person responsible for the accident.

The ISS crew isolated the Zvezda module as a precaution.

The leak was analyzed, and air was found to be leaving the Zvezda module's transition chamber twice as fast as normal.

The situation did not affect crew safety, and experts were consulted on next steps.

The crack was caused by a manufacturing defect and the leak was under analysis.

A Progress cargo ship was scheduled to deliver equipment to fix a leak that Russian cosmonauts were working to eliminate.

The ISS operation is expected to continue beyond 2024.

The ISS was aging and needed frequent repairs, with new cracks discovered in 2021.

The air leak was fixed, reducing the leak rate from 1.14 kg to 0.47 kg per day after Zvezda module repairs.

Roscosmos cosmonauts sealed the cracks and reduced the air leakage.

The International Space Station is planned to operate until 2030, highlighting the need for NASA and Roscosmos collaboration to maintain its safety.

The station's systems are regularly monitored to prevent air leaks and issues are addressed promptly.

The incident led to improvements in spacecraft design and construction, focusing on preventing air leaks and ensuring crew safety.

The International Space Station (ISS) experienced an air leak in its Zvezda module, first detected in 2019.

Title:

Content: Ribbon
01 January 07: 01
All news
vk.com / Cosmonaut Ivan Wagner
Moscow, January 1.
Russian cosmonauts Pyotr Dubrov and Anton Shkaplerov discovered in the Zvezda module on the International Space Station, presumably the last place of air leakage.
This was reported in the press service of Roscosmos.
The first small leak was discovered on the ISS back in 2019, since then, astronauts have been monitoring the situation and eliminating cracks in the hull.
Experts know how to return the module tightness.
This will be done as soon as Progress delivers the necessary equipment to orbit.
“Russian cosmonauts Peter Dubrov and Anton Shkaplerov found a possible last place of air leakage in the intermediate chamber of the service module“ Star ” of the Russian segment of the ISS ”, — stated in the message.
Russian President Vladimir Putin previously admitted the possibility of continuing the operation of the ISS after 2024.
This is necessary to maintain high launch activity.
Go back
Comment

The leak in the Zvezda module's intermediate chamber was caused by a crack.

Title:

Content: Soyuz manufacturing defect causes air leak at International Space Station
Kazakhstan News Agency / Astana / September 3 - According to the Russian satellite network reported on the 3rd, Russian rocket space sources said that the manufacturing defect is the cause of the "Soyuz MS-09" spacecraft leak.
There was an air leak on the International Space Station on August 30.
The astronauts examined all the compartments and found tiny cracks in the Soyuz MS-09 spacecraft.
It is located in the living module, not in the return module, so it will not affect the return of the spacecraft to Earth.
It was previously thought that the fissure was the result of a miniature meteorite hitting the spacecraft.
The next night, Russian cosmonauts used special sealant to fill the hole.
The source said: "The cause of the crack in the inner shell of the living module has been identified and it has appeared on Earth.
The person responsible for the fault was identified. "
According to another source, the crew likely sealed the leak with special glue after realizing the mistake, so it was not detected during the pre-launch check and the spacecraft ’ s first two months of orbital flight.
"However, the glue later dried out and was squeezed out, revealing cracks," he said.
The Russian space agency said a special committee would investigate and determine the cause of the accident.
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The crack was initially blamed on a meteorite, but was later found to be a manufacturing defect.

A tea bag was used to detect and locate the air leak.

Title:

Content: How did a bag of tea help astronauts save $150 billion?
How did a bag of tea help astronauts save $150 billion?
A few years ago, a torn bag helped save the ISS
The International Space Station was built in 1998 for $150 billion.
Every year, another 3-4 billion dollars are spent to maintain its operability, but the design is already very old and needs repair more and more often.
For example, in August 2020, a pressure drop was recorded aboard the space station, which is a sign of an air leak.
All astronauts and cosmonauts on board were isolated in the Russian Zvezda module.
After some time, it was found out that the air-permeable crack was in the module in which the entire crew temporarily settled.
One of the Russian cosmonauts was able to quickly find the place of leakage with the help of a usual tea bag.
Oxygen on the ISS
According to the India Times, the space station loses about 250 grams of oxygen every day and this is normal - it is difficult to achieve complete tightness.
In the event of an acute shortage of oxygen, it is delivered by cargo ships, but is most often produced directly at the station.
In the second case, members of the ISS use electrolysis - an electric current is passed through the water, as a result of which oxygen appears.
To do this, on board there is a life support system ECLSS, which not only monitors the operation of the station, but also provides people with access to water, protects against fires and so on.
ECLSS technical director Robyn Carrasquillo once praised Russia for using a way to extract moisture from the air, even in the old Salyut and Mir spacecraft.
ECLSS system
Oxygen leakage to the ISS
In August 2020, the space station began to lose about a kilogram of air per day.
The situation was serious, but the lives of the ISS crew were not threatened.
Astronauts from different countries temporarily began to live in the Russian module “Zvezda ” and for four days searched for a leak in other parts of the station.
The search did not give any results, so it became clear that the gap is in the Zvezda module launched more than 20 years ago.
The leak could have occurred for various reasons, for example, due to the collision of the ISS with space debris, which is a lot in near-Earth space.
Also, it was not excluded that seals simply peeled off from the walls of the station, which just do not allow oxygen to leak.
ISS module "Zvezda"
Search for the place of oxygen leakage
An unusual way to find the leak was found by cosmonaut Anatoly Ivanishin.
He installed several cameras in the module and opened the tea bag.
After some time, the ISS members noticed that the tea leaves began to move slowly towards one of the metal walls of the module.
After studying the trajectory of the leaves, the space crew quickly found the crack formed on the ISS.
First, they taped this place with tape, and then got permission to use a drill and sealant.
It is known that thanks to the trick with a package of tea, the astronauts managed to save about 150 billion dollars.
Russian cosmonaut Anatoly Ivanishin
The International Space Station is aging and will one day become completely unusable – that ’ s a fact.
New cracks were discovered even in 2021.
Especially there are many of them in the Russian module “Zarya ”, which was launched into space in 1998 and today is the oldest part of the station.
More recently, Vladimir Solovyov, General Designer of the Energia Rocket and Space Corporation, announced his concerns about the safety of the station.
It is especially frightening that the station is planned to be used even after 2025.
In theory, the use of the old station could cause a terrible disaster.
ISS module "Zarya"
Finally, I note that to replace the old module "Dawn" it was planned to send the module "Science".
But it became an independent module and docked to the ISS in July 2021.
The docking was far from perfect - the module deployed the station at 45 degrees.
19 october 2021 /
• 0
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On the ISS found a place of air leakage.
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The leak, located in the living module, did not pose a serious threat to the crew's safety.

Russian cosmonauts filled the hole with sealant, but it dried out and failed.

A special committee identified the person responsible for the accident.

The ISS crew isolated the Zvezda module as a precaution.

Title:

Content: Possible location of air leak from the International Space Station
Space
International Space Station
Copy Link https: / / www.rt.com / s7a8
The media office of the Roscosmos Foundation announced that the Russian cosmonauts discovered in the unit "Zvezda", the possible place of air leakage from the International Space Station.
According to the information office, the materials and equipment needed to repair this place will be sent aboard the Progress cargo vehicle.
"The equipment and materials necessary to stop air leakage will be sent with the first Progress cargo vehicle launched to the International Space Station, to solve this problem once and for all," the statement said.
Astronauts Peter Dobrov and Anton Shkaplerov discovered the possible location of the air leak in December in the middle chamber of the Zvezda unit.
NASA has said it is considering isolating the Zvezda module completely if necessary.
The Roscosmos media office commented: “The concerns of our partners are unfounded and surprising. ”
Source: Novosti
Agree.
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The leak was analyzed, and air was found to be leaving the Zvezda module's transition chamber twice as fast as normal.

Title:

Content: NEWS
NEWS
February 28, 20: 41
Science
Roscosmos reported air leakage on the Russian segment of the ISS
Photo: telegram channel "State Corporation" Roscosmos "
Air leakage occurred on the Russian segment of the ISS, the crew and the station itself is not threatened.
This writes TASS with reference to the press service of Roscosmos.
“Indeed, experts fix the leakage of air on board the ISS.
The crew regularly carries out work to find and eliminate possible leakage sites, and the data coming from the station are transmitted for analysis to specialists in the normal mode, ” the state corporation said.
According to "Interfax" with reference to the head of the NASA program on the ISS Joel Montalbano, the leak is observed in the tail part of the ISS.
“We saw that the leak increased about a week before the last launch of Progress and its docking with the station, ” he said.
The head of the NASA program on the ISS said that the air in the transition chamber of the Zvezda module began to leave twice as fast.
According to Montalbano, experts are in contact with Russian colleagues on the next steps.
However, this situation does not affect the safety of the crew, he said.
Last year, Russian cosmonauts Oleg Kononenko and Nikolai Chub in outer space disconnected the faulty circuit of the additional radiator on the module "Science" from the main circuit of the module.
Before that, they went into outer space, opening the exit hatch of the module "Search" of the International Space Station.
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The situation did not affect crew safety, and experts were consulted on next steps.

The crack was caused by a manufacturing defect and the leak was under analysis.

A Progress cargo ship was scheduled to deliver equipment to fix a leak that Russian cosmonauts were working to eliminate.

The ISS operation is expected to continue beyond 2024.

The ISS was aging and needed frequent repairs, with new cracks discovered in 2021.

The air leak was fixed, reducing the leak rate from 1.14 kg to 0.47 kg per day after Zvezda module repairs.

Title:

Content: In the world
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Russia and the United States will determine the causes of cracks that are looking for on the ISS from 2020
Russian and American experts during the meeting determine the reasons that led to the formation of cracks in the transition chamber (PrK) of the service module "Star" of the Russian segment of the ISS.
This was announced on Wednesday by the chief specialist (RSC) "Energy" (included in).
Photo: TASSTASS
“Now there is a meeting with American partners, why they [cracks] formed.
The first factor is age, <... > the second is technological solutions that eventually led to cracks, "Spirin said at the XLVII Academic Readings on Cosmonautics in memory of S. P. Korolev.
Video of the day
According to him, the leakage rate for the station is 325 grams per day.
“We stayed until 2019.
When the PrK was closed, we entered this norm, "the expert explained, stressing that if the camera is isolated and opened extremely rarely, then you can continue to fly to the ISS.
According to the presentation presented by Spirin, since the start of work on the search for the leak in September 2020, the damage to the shell has been localized and eliminated in three places.
"As a result of the work, the rate of air leakage from PrK was consistently reduced from 1.14 kg per day to 0.47 kg per day on a permanent basis and to 0.3 kg per day - on a temporary basis," the presentation emphasizes.
In March 2021, cosmonauts Roscosmos and Sergey Kud-Sverchkov carried out repair and restoration work on the housing of the Zvezda module, where they found a crack and a number of possible leaks.
All actions were carried out under the leadership of the Main Operational Group of the ISS Russian Segment and RSC Energia engineers and coordinated with specialists.
In mid-April 2022, a Roscosmos cosmonaut told reporters that air leakage had decreased three times after sealing the cracks.
XLVII Academic Readings on Cosmonautics in memory of S. P. Korolev (Royal Readings) are held at the Bauman Moscow State Technical University from January 24 to 27.

Roscosmos cosmonauts sealed the cracks and reduced the air leakage.

The International Space Station is planned to operate until 2030, highlighting the need for NASA and Roscosmos collaboration to maintain its safety.

Title:

Content: Russia says coolant leak from International Space Station backup line, crew safe
The Russian space agency Roscosmos confirmed that the coolant leaked from a spare external cooling device at the new Russian science laboratory, confirming that the main thermal control system in the laboratory "works normally"
Posted in: Last Updated:
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Russian officials said on Monday that coolant had leaked from a backup line at the International Space Station and that there was no danger to the crew or the site.
The Russian space agency Roscosmos reported that the coolant leaked from a backup external cooling device at the new Russian science laboratory, confirming that the laboratory's main thermal control system was "operating normally."
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Roscosmos said: "There is no danger to the crew and the station."
While NASA confirmed there was no threat to the station's seven-member crew and operations were continuing as usual, Roscosmos said engineers were investigating the cause of the leak.
The accident comes on the heels of a coolant leak from a Russian spacecraft parked at the station recently.
Officials said small meteorites were the cause of such leaks, such as a leak of coolant from a Soyuz capsule that docked at the station in December, and another similar leak from the supply ship Progress was discovered in February.
A Russian investigation has concluded that the leaks may have been caused by the impact of small meteorites, not manufacturing defects.
The Soyuz capsule leak led to a lengthy stay for NASA astronaut Frank Rubio and his Russian colleagues, Sergei Prokopev and Dmitry Beitlin, who spent 371 days in orbit instead of six months.
A replacement capsule was sent to the station to bring back the astronauts.
The space station, which served as a symbol of international cooperation in the post-Cold War era, is now one of the remaining areas of cooperation between Russia and the West amid tensions over Moscow ’ s war in Ukraine.
NASA and its partners hope to continue operating the orbital station until 2030.
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The station's systems are regularly monitored to prevent air leaks and issues are addressed promptly.

The incident led to improvements in spacecraft design and construction, focusing on preventing air leaks and ensuring crew safety.

Title:

Content: Boeing has completed the repair of the Starliner and announced the date of the second test flight
8 May 2022, 13: 26
Read news in ukrainian
Source:
SpaceNews
The development of long-suffering main competitor Dragon SpaceX is approaching the final stage.
In less than two weeks, the CST-100 Starliner will finally embark on its second test flight.
The second orbital test flight (OFT-2) Starliner is scheduled for the evening of May 19 (1: 54 on May 20, Kyiv time).
NASA and Boeing concluded that all previously discovered flaws in the spacecraft have been eliminated or corrected by appropriate changes in procedures.
The US military plans to test a spacecraft with a nuclear engine
Starliner is preparing to launch
Currently, the CST-100 is being prepared for launch - its integration with the Atlas V launch vehicle in the ULA vertical assembly building near the SLC-41 launch pad of the US Space Force Base at Cape Canaveral.
Problems of the Boeing spacecraft
OFT-2 (the second test flight) almost took place in August last year, but it was canceled a few hours before launch.
Initially, the delay was caused by the emergency operation of the engines of the Russian module "Science".
Because of this, the entire International Space Station performed one and a half turns around its axis.
Therefore, before returning to normal operation, the orbital laboratory decided to properly check.
And the ships were not launched for several days.
And on Earth at this time, another pre-launch inspection of Starliner found a critical problem - corrosion of the valves of the fuel system.
Of the 24 nodes of the same type, 13 refused to work and the mission was canceled for detailed consideration.
The reason was the formation of nitric acid from atmospheric moisture and small leaks of nitrogen tetroxide (NTO, an oxidizing agent for the ship's engines).
By themselves, small amounts of leaking NTO due to Teflon gaskets are not new.
This feature of the materials used was known for a long time and was not a big problem, with such leaks all specialists were able to work.
Two questions arose: where in the fuel system moisture and how corrosion sites were not detected during preliminary inspections or tests.
Read on the website Rocket Lab caught, then dropped the first degree of the rocket Electron
Solving the problem
Boeing, in collaboration with NASA, conducted a series of studies and tests to study the phenomenon of valve corrosion.
As a result, a number of procedures have been developed to avoid node failure.
In particular, nitrogen tetraoxide refueling will now take place much later during the pre-launch preparation of the ship.
And the valves themselves before that are subjected to dry cleaning.
In addition, from the moment of filling with the oxidant and before the launch, the performance of each of them is planned to be checked every 2-5 days.
Valves of the new design will be installed on the next versions of the CST-100, if it is possible to have time for the ship that will fly away in the first manned mission.
Its terms are still carefully labelled as "the end of the year".
But, of course, it all depends solely on the results of the second test flight.


The air leak at the International Space Station was first detected in September 2019, with the leak located in the Russian Zvezda module.

The leak was caused by a crack in the module, which was possibly caused by a manufacturing defect [1] or a micrometeorite impact.

The crack was located in the intermediate chamber of the service module [3] or the transition chamber of the Zvezda module.

Russian cosmonauts used a sealant to fill the hole temporarily [1], and also used a tea bag to detect the leak.

The leak did not pose a threat to the crew or the station [2, 4, 6], but it did cause a loss of oxygen, with the station losing around 250 grams of oxygen daily.

The crew used electrolysis to produce oxygen [5], and the station's life support system, known as the ECLSS, monitored the situation.

The leak was continuously monitored since its detection in 2019 [3], and the crew worked to find and eliminate the leak.

Russian cosmonauts, including Pyotr Dubrov and Anton Shkaplerov, played a key role in finding the leak and planning the repairs.

The Progress cargo ship was scheduled to deliver equipment to fix the leak.

The repairs were pending the delivery of necessary funds [7], but the crew was able to temporarily fix the crack.

The Russian space agency, Roscosmos, formed a committee to investigate the cause of the leak [1], and NASA worked together with Roscosmos to fix the leak.

The leak was eventually sealed, but not before new cracks were found in the ISS modules in 2021.

The incident highlighted the importance of continuous monitoring and maintenance of the International Space Station.

The air leak at the International Space Station was first detected in September 2019, with the leak located in the Russian Zvezda module.

Title:

Content: Ribbon
01 January 07: 01
All news
vk.com / Cosmonaut Ivan Wagner
Moscow, January 1.
Russian cosmonauts Pyotr Dubrov and Anton Shkaplerov discovered in the Zvezda module on the International Space Station, presumably the last place of air leakage.
This was reported in the press service of Roscosmos.
The first small leak was discovered on the ISS back in 2019, since then, astronauts have been monitoring the situation and eliminating cracks in the hull.
Experts know how to return the module tightness.
This will be done as soon as Progress delivers the necessary equipment to orbit.
“Russian cosmonauts Peter Dubrov and Anton Shkaplerov found a possible last place of air leakage in the intermediate chamber of the service module“ Star ” of the Russian segment of the ISS ”, — stated in the message.
Russian President Vladimir Putin previously admitted the possibility of continuing the operation of the ISS after 2024.
This is necessary to maintain high launch activity.
Go back
Comment

The leak was caused by a crack in the module, which was possibly caused by a manufacturing defect [1] or a micrometeorite impact.

Title:

Content: Russia to send rescue vehicle to International Space Station after leak
MOSCOW (AFP) - Russia said on Wednesday it will send a rescue vehicle to the International Space Station on February 20 to return three crew members of a Soyuz spacecraft damaged by a leak last month.
Announcement
The Soyuz MS-22 spacecraft, currently docked on the International Space Station, experienced a massive coolant leak in mid-December, and images showed quantities of particles leaking into space from the rear of the Russian spacecraft.
After examining the state of the device, the Russian space agency Roscosmos announced Wednesday that it considered it best to send another spacecraft, Soyuz MS-23, to bring back Russian cosmonauts Sergey Prokopiev and Dmitry Bitlin, as well as American astronaut Frank Rubio.
"It was decided to send the Soyuz MS-23 spacecraft on February 20, 2023 without passengers," Roscosmos said in a statement, but with the necessary equipment.
The spacecraft was initially scheduled to take off on March 16 to take three more astronauts to the International Space Station.
Joel Montalpano, director of the International Space Station program at NASA ’ s Johnson Space Center in Houston, said, “We don ’ t call this Soyuz a backup, ” but a“ replacement. ”
"For now, the crew is safe on board."
The return of the Russian and American pilots, initially scheduled for March 28, has not been announced.
But their mission will be extended "by several months," Roskosmos manned flight director Sergei Krikalyov told a news conference.
The damaged vehicle will return to Earth empty, possibly “in mid-March or at the end of March, ” Krikalyov said.
Emergency Scenarios
Pending the arrival of the replacement vehicle, and in the event of an emergency that necessitates the evacuation of the International Space Station, the Russian and US space agencies are considering several scenarios.
But both agencies said that possibility was still remote.
The first scenario is to bring the three crew members aboard the damaged Soyuz spacecraft, despite concerns about the temperature that can be reached inside the spacecraft at the time of landing.
The second scenario is to reduce the "convection" on board Soyuz by "reducing the size of the crew".
After that, one of the three passengers will be returned by a SpaceX spacecraft that is also currently anchored on the International Space Station.
In fact, in addition to the three crew members who came aboard Soyuz, the ISS currently has four other passengers who arrived aboard SpaceX ’ s Dragon spacecraft, which is also supposed to be used to bring them back.
The idea, therefore, is to secure a fifth person on board, “in the area where the cargo would normally be, ” explained Joel Montalpano, head of NASA ’ s International Space Station program.
Accurate meteor impact.
The leak was detected on 14 December aboard the Soyuz spacecraft, as the two Russian cosmonauts were about to exit the station into space.
A preliminary assessment of the causes of the coolant leakage attributed the event to the possibility of a naturally occurring small meteorite impact, man-made debris in orbit or hardware failure.
On Wednesday, Roskomos confirmed that the hypothesis of the impact of a micrometeorite was "experimentally proven".
According to the Russian agency, a hole "less than a millimeter in diameter" was opened in a cooling pipe.
Given the speed at which experts believe the object collided with the International Space Station, it could have been caused by a "meteorite that came from a random direction", not a piece of debris that "wouldn't have been able to stay in orbit" so quickly, according to Sergei Krikalyov.
The Russian agency ruled out any mechanical failure.
For Vitaly Egorov, a Russian specialist on space issues, the decisions announced by the Russian space agency Roscosmos on Wednesday "are ideal to ensure the safety of (the crew) and minimize damage to the space program."
The ISS is one of the few remaining areas of cooperation between Moscow and Washington since the start of the Russian invasion of Ukraine on February 24 and subsequent Western sanctions.
Roskosmos President Yuri Borisov last month praised the solidarity of Americans aboard the International Space Station, who have "extended a helping hand to help us" at a time when relations between the Kremlin and the White House were at an all-time low.
The International Space Station was launched in 1998 in a phase of U.S.-Russian cooperation, following the space race the two countries engaged in during the Cold War.
But the project has faced many technical problems, as well as corruption scandals that have tarnished the reputation of the Russian space industry in recent years, as it competed with the United States in the space race.

The crack was located in the intermediate chamber of the service module [3] or the transition chamber of the Zvezda module.

Title:

Content: Possible location of air leak from the International Space Station
Space
International Space Station
Copy Link https: / / www.rt.com / s7a8
The media office of the Roscosmos Foundation announced that the Russian cosmonauts discovered in the unit "Zvezda", the possible place of air leakage from the International Space Station.
According to the information office, the materials and equipment needed to repair this place will be sent aboard the Progress cargo vehicle.
"The equipment and materials necessary to stop air leakage will be sent with the first Progress cargo vehicle launched to the International Space Station, to solve this problem once and for all," the statement said.
Astronauts Peter Dobrov and Anton Shkaplerov discovered the possible location of the air leak in December in the middle chamber of the Zvezda unit.
NASA has said it is considering isolating the Zvezda module completely if necessary.
The Roscosmos media office commented: “The concerns of our partners are unfounded and surprising. ”
Source: Novosti
Agree.
This website uses cookies. You can read the terms of use to activate this feature by clicking here

Title:

Content: On the ISS found a place of possible air leakage in the module “Star ”
On the International Space Station, a place of possible air leakage in the Zvezda module was discovered.
The discovery of a "suspicious" place in the module compartment was reported by cosmonaut Pyotr Dubrov during negotiations with the Flight Control Center.
“There was a suspicious place.
I was engaged in photographing it under a microscope with magnifying glasses, ” the cosmonaut quoted Interfax as saying.
Recall that in August 2020, air leakage to the ISS was detected in the transition chamber of the Zvezda module.
In October last year, cosmonauts managed to find the crack and repair it with temporary means.
In August 2021, the media reported the detection of non-through cracks in the Russian module of the ISS "Zarya".
Executive Director of Roscosmos for manned programs Sergei Krikalev said then that he had no information about new cracks at the station.
At the same time, the representative of the state corporation noted that even in the presence of non-through cracks, the ISS can be operated for another 20 years.
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Is the ISS going to be a space hotel?

Russian cosmonauts used a sealant to fill the hole temporarily [1], and also used a tea bag to detect the leak.

Title:

Content: How did a bag of tea help astronauts save $150 billion?
How did a bag of tea help astronauts save $150 billion?
A few years ago, a torn bag helped save the ISS
The International Space Station was built in 1998 for $150 billion.
Every year, another 3-4 billion dollars are spent to maintain its operability, but the design is already very old and needs repair more and more often.
For example, in August 2020, a pressure drop was recorded aboard the space station, which is a sign of an air leak.
All astronauts and cosmonauts on board were isolated in the Russian Zvezda module.
After some time, it was found out that the air-permeable crack was in the module in which the entire crew temporarily settled.
One of the Russian cosmonauts was able to quickly find the place of leakage with the help of a usual tea bag.
Oxygen on the ISS
According to the India Times, the space station loses about 250 grams of oxygen every day and this is normal - it is difficult to achieve complete tightness.
In the event of an acute shortage of oxygen, it is delivered by cargo ships, but is most often produced directly at the station.
In the second case, members of the ISS use electrolysis - an electric current is passed through the water, as a result of which oxygen appears.
To do this, on board there is a life support system ECLSS, which not only monitors the operation of the station, but also provides people with access to water, protects against fires and so on.
ECLSS technical director Robyn Carrasquillo once praised Russia for using a way to extract moisture from the air, even in the old Salyut and Mir spacecraft.
ECLSS system
Oxygen leakage to the ISS
In August 2020, the space station began to lose about a kilogram of air per day.
The situation was serious, but the lives of the ISS crew were not threatened.
Astronauts from different countries temporarily began to live in the Russian module “Zvezda ” and for four days searched for a leak in other parts of the station.
The search did not give any results, so it became clear that the gap is in the Zvezda module launched more than 20 years ago.
The leak could have occurred for various reasons, for example, due to the collision of the ISS with space debris, which is a lot in near-Earth space.
Also, it was not excluded that seals simply peeled off from the walls of the station, which just do not allow oxygen to leak.
ISS module "Zvezda"
Search for the place of oxygen leakage
An unusual way to find the leak was found by cosmonaut Anatoly Ivanishin.
He installed several cameras in the module and opened the tea bag.
After some time, the ISS members noticed that the tea leaves began to move slowly towards one of the metal walls of the module.
After studying the trajectory of the leaves, the space crew quickly found the crack formed on the ISS.
First, they taped this place with tape, and then got permission to use a drill and sealant.
It is known that thanks to the trick with a package of tea, the astronauts managed to save about 150 billion dollars.
Russian cosmonaut Anatoly Ivanishin
The International Space Station is aging and will one day become completely unusable – that ’ s a fact.
New cracks were discovered even in 2021.
Especially there are many of them in the Russian module “Zarya ”, which was launched into space in 1998 and today is the oldest part of the station.
More recently, Vladimir Solovyov, General Designer of the Energia Rocket and Space Corporation, announced his concerns about the safety of the station.
It is especially frightening that the station is planned to be used even after 2025.
In theory, the use of the old station could cause a terrible disaster.
ISS module "Zarya"
Finally, I note that to replace the old module "Dawn" it was planned to send the module "Science".
But it became an independent module and docked to the ISS in July 2021.
The docking was far from perfect - the module deployed the station at 45 degrees.
19 october 2021 /
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The leak did not pose a threat to the crew or the station [2, 4, 6], but it did cause a loss of oxygen, with the station losing around 250 grams of oxygen daily.

The crew used electrolysis to produce oxygen [5], and the station's life support system, known as the ECLSS, monitored the situation.

The leak was continuously monitored since its detection in 2019 [3], and the crew worked to find and eliminate the leak.

Title:

Content: NEWS
NEWS
February 28, 20: 41
Science
Roscosmos reported air leakage on the Russian segment of the ISS
Photo: telegram channel "State Corporation" Roscosmos "
Air leakage occurred on the Russian segment of the ISS, the crew and the station itself is not threatened.
This writes TASS with reference to the press service of Roscosmos.
“Indeed, experts fix the leakage of air on board the ISS.
The crew regularly carries out work to find and eliminate possible leakage sites, and the data coming from the station are transmitted for analysis to specialists in the normal mode, ” the state corporation said.
According to "Interfax" with reference to the head of the NASA program on the ISS Joel Montalbano, the leak is observed in the tail part of the ISS.
“We saw that the leak increased about a week before the last launch of Progress and its docking with the station, ” he said.
The head of the NASA program on the ISS said that the air in the transition chamber of the Zvezda module began to leave twice as fast.
According to Montalbano, experts are in contact with Russian colleagues on the next steps.
However, this situation does not affect the safety of the crew, he said.
Last year, Russian cosmonauts Oleg Kononenko and Nikolai Chub in outer space disconnected the faulty circuit of the additional radiator on the module "Science" from the main circuit of the module.
Before that, they went into outer space, opening the exit hatch of the module "Search" of the International Space Station.
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Russian cosmonauts, including Pyotr Dubrov and Anton Shkaplerov, played a key role in finding the leak and planning the repairs.

Title:

Content: The Russian module of the ISS “Zvezda ” can be completely isolated due to air leakage
reads: 670
23.01.2022 23: 30
The Russian Zvezda module, which is one of the modules of the Russian segment of the International Space Station, could be permanently isolated due to air leakage.
This was reported by NASA Director for the ISS Robin Gatens, reports “Interfax ”.
She said that the situation with the module does not yet pose a serious threat to the ISS, but in the worst case, is considering the option of complete isolation of the “Star ”.
According to Gatens, NASA and Roscosmos are working together to eliminate air leakage in the module, but due to the small size of the crack, it is difficult to detect detectors and ultrasonic diagnostic tools.
In turn, Roscosmos said that the concern of their colleagues on the ISS “is not justified and is surprising. ”
According to the Russian Ministry, the cosmonauts found the site of the leak at the end of last month.
They promise to fix the problem when the Progress cargo ship delivers materials to the ISS.
Note that in the Russian segment of the space station repeatedly there were problems and other problems.
For the first time, an air leak in one of the modules was detected in September 2019, in October 2020, a crack was detected in the camera of the Zvezda module.
Recall that earlier it was reported that at the end of July 2021, after docking the Russian module “Science ” to the International space station, it turned on the engines, because of which the station began to move chaotically and for a time lost control over the orientation of the ISS.
Wikipedia: The International Space Station, Inc.
International Space Station (ISS).
ISS) is a manned orbital station used as a multi-purpose space research complex; it is operated from the end of 1998 to the present (the countries agreed to operate through 2024 inclusive, the extension of the period of operation to 2028, 2030 is being considered).
The ISS is a joint international project involving 14 countries: Russia, the United States, Japan, Canada and members of the European Space Agency Belgium, Germany, Denmark, Spain, Italy, the Netherlands, Norway, France, Switzerland, Sweden (originally the participants were Brazil and the United Kingdom).
The ISS is controlled by the Russian segment from the Space Flight Control Center in Korolev, the American segment from the Lyndon Johnson Flight Control Center in Houston.
The European Columbus and Japanese Kibo modules are controlled by the European Space Agency (Oberpfaffenhofen, Germany) and the Japan Aerospace Exploration Agency (Tsukuba).
There is a constant exchange of information between the centers.
Photofact

Title:

Content: Ribbon
January 19 00: 04
All news
pxhere.com
Moscow, January 18.
Astronauts of the Russian segment of the International Space Station have discovered a possible place of air leakage in the chamber of the Zvezda module.
The relevant data follows from the material published by the press service of Roscosmos.
It is known that soon the nearest cargo ship "Progress" will be delivered to the ISS means of eliminating leakage.
After that, the Russian cosmonauts will immediately begin the final elimination of the cause of the leak.
"The means of eliminating non-hermeticity are planned to be delivered on the nearest Progress cargo ship, after which the cosmonauts will begin the final elimination of the leak," Roscosmos said.
Earlier, Russian cosmonauts Peter Dubrov and Anton Shkaplerov discovered a potential last place of air leakage in the Zvezda module.
Specialists will be able to restore its tightness as soon as Progress delivers the necessary equipment to the station.
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Comment

The Progress cargo ship was scheduled to deliver equipment to fix the leak.

The repairs were pending the delivery of necessary funds [7], but the crew was able to temporarily fix the crack.

The Russian space agency, Roscosmos, formed a committee to investigate the cause of the leak [1], and NASA worked together with Roscosmos to fix the leak.

The leak was eventually sealed, but not before new cracks were found in the ISS modules in 2021.

The incident highlighted the importance of continuous monitoring and maintenance of the International Space Station.

Title:

Content: 22: 04, 31 December 2021
The Russian crew found the alleged site of air leakage on the International space station
It is located in the module “Star ”, said in“ Roscosmos ”.
The cosmonauts will begin repair work after the nearest Progress cargo ship will deliver the necessary funds to them, the state corporation said.
Today, during the congratulations of the Russian participants of the expedition to the ISS, the head of Roscosmos, Dmitry Rogozin, spoke about the problems faced by the astronauts.
Air leakage at the station was recorded more than two years ago.
Since then, crew members have found several cracks and reported that they were able to seal them.
However, the pressure on the station continued to fall.
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