How merchant reactors could widen naval nuclear access

Could widespread nuclear merchant shipping make nuclear propulsion accessible to more navies?

Yes. Civilian marine-reactor experience could broaden access even while U.S. submarine technology remains tightly controlled.

The United States normally guards naval nuclear-propulsion technology closely, and the Australian submarine arrangement requires workarounds. That policy is separate from the wider technological environment. If nuclear-powered merchant ships become mainstream, more states will gain industrial and operational familiarity with marine reactors. Civilian diffusion could therefore lower some barriers to naval nuclear propulsion without amounting to direct transfer of U.S. submarine designs.