Originally posted by Big RICHARD
All Royal Navy submarines have a nuclear power plant. This negates the need for refuelling and means that a submarine can go for months at a time without surfacing or returning to base.
I got this off google...wow...
The Vanguard class submarine's main nuclear powered propulsion system is based on the second-generation Rolls-Royce PWR 2, which was developed specifically for the Vanguard Class. Current generations of PWR allow submarines to circumnavigate the world about 20 times, whereas the latest development of PWR would allow circumnavigation 40 times without refuelling.
40 freaking times!!! Now I know that maybe they won't have enough food, but still...that's a lot of plutonium stuck in there!