A life-of-ship core reactor capability is being pursued for the Ohio-class ballistic missile submarine replacement program (SSBN(X)). Thanks to advances in metallurgy, design and manufacturing, reactors and components can now last for the full service life of the ship, and that means ship will not have to be taken out of service for a costly and lengthy overhaul to be refueled. That also means an overall reduction in number of ships required to execute the mission, because ships won’t be taken out of service as often or for as long.
The Virginia-class of nuclear-powered attack submarines has a General Electric S9G pressurized water reactor, which is designed to operate for 33 years without refueling.
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