quote [ India’s first ballistic missile submarine was out of commission for ten months after someone neglected to properly close a hatch. The nuclear-powered submarine INS Arihant was flooded with saltwater, necessitating nearly a year’s worth of repairs.

Arihant was out of action for ten months as water was pumped out and pipes were cut out and replaced. Indian authorities likely felt that pipes exposed to corrosive seawater couldn't be trusted again, particularly pipes that carry pressurized water coolant to and from the ship’s 83 megawatt nuclear reactor. ]