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A Russian Nuclear Submarine Was Flooded with Deadly Freon Gas

Key Points and Summary –  Eight years after the Kursk tragedy, the Russian Navy faced another submarine nightmare when a Freon gas leak on the new Akula-class submarine K-152 Nerpa killed 20 sailors and civilians during sea trials in 2008. The accidental discharge from the fire-suppression system filled two compartments with the toxic gas, leading to mass asphyxiation. The disaster, which occurred while the submarine was being prepared for lease…
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nationalsecurityjournal.org broke the news in on Monday, July 14, 2025.
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