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501

What could go wrong here ...?

FTA: "MOSCOW, January 22. /TASS/. The specialists have discovered one more crack at the International Space Station and suspect that yet another one exists, ISS Russian Segment head Vladimir Solovyov told Rossiya-24.

"So far, we have found one place and suspect another, where as some kind of leak exists. We must bring a powerful microscope on a cargo spacecraft and use to examine this place. We are not totally certain so far," Solovyov said.

He underscored that air loss due to the crack are insignificant.

"This leak is like as if you’d drill the hull with a 0.2 mm diameter drill. I’m not sure such drills even exist in household. As for the leak it causes, our [space air] pressure is 750 mmHg, and this alleged crack causes us to lose 0.3 to 0.4 mmHg every day," the official said, adding that emergency leak starts when pressure falls at 0.5 to 1 mmHg per minute."

What could go wrong here ...? FTA: "MOSCOW, January 22. /TASS/. The specialists have discovered one more crack at the International Space Station and suspect that yet another one exists, ISS Russian Segment head Vladimir Solovyov told Rossiya-24. "So far, we have found one place and suspect another, where as some kind of leak exists. We must bring a powerful microscope on a cargo spacecraft and use to examine this place. We are not totally certain so far," Solovyov said. He underscored that air loss due to the crack are insignificant. "This leak is like as if you’d drill the hull with a 0.2 mm diameter drill. I’m not sure such drills even exist in household. As for the leak it causes, our [space air] pressure is 750 mmHg, and this alleged crack causes us to lose 0.3 to 0.4 mmHg every day," the official said, adding that emergency leak starts when pressure falls at 0.5 to 1 mmHg per minute."

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[–] 0 pt

Is ISS pressure really that high?

I guess it kind of makes sense if they want to keep O2 levels down.

The partial pressure of oxygen needed for life is only about 3psi (20% O2 at 15psi, or 100% O2 at 3psi) and I believe the Apollo craft used a very low psi with high O2 concentration.

Maybe the long term fire potential is too high, and they want that 20% O2 at a high pressure.