The lede: Everyone covering nuclear-Navy stocks is fixated on new hulls — Columbia-class subs, Ford-class carriers, the multi-decade backlog headlines. But the Navy's existing fleet doesn't run on new-build contracts; it runs on the U.S. Naval Nuclear Propulsion Program, the joint Navy/DOE office that has, since Rickover, insisted every reactor core, refueling, and life-extension job route through a small, sole-sourced industrial base. That's a policy structure, not a market — there is no competitive bid for who refuels a Nimitz-class carrier's reactor. It's BWXT, full stop. And because carriers and submarines need mid-life refueling and complex overhauls (RCOH) on fixed nuclear-physics timelines regardless of what Congress does to the topline shipbuilding budget, this is defense revenue that survives continuing resolutions, sequestration threats, and new-construction schedule slips. The Navy just opened an 80,000-square-foot Carrier Refueling Overhaul Workcenter at Newport News specifically to industrialize this cadence — a tell that RCOH work is scaling as a standing program, not a one-off.