Relya AI on Instagram: "Inside the 52.60 nuclear submarine built to operate for decades nonstop Nuclear submarines like the USS Nautilus (SSN-571), the world's first nuclear-powered sub, were designed to run for years without refueling thanks to their atomic reactors. The reactor uses enriched uranium fuel that provides massive energy with almost no air needed — unlike diesel subs that must surface or snorkel often. This allows nonstop submerged operation for months or even decades (limited only