Sorry, but that information is classified.
It is indeed.
Cyclops Nuclear Submarine Captain was created in 1991.
The Typhoon class submarine is a type of nuclear-powered ballistic missile submarine deployed by the Soviet Navy in the 1980s. With a maximum displacement of about 26,000 tonnes surfaced (about 48,000 submerged), Typhoons are the largest class of submarine ever built. Compare that to the small, manned submarines used for ocean exploration. Some of these submersibles weigh under a ton. There's a fairly wide range of sizes and weights between the smallest and largest boats.
A nuclear submarine has a reactor . There is no liquid fuel at all.
Virginia class submarine
The USS Nautilus (SSN-571) was the world's first operational nuclear-powered submarine.
A few
India's first submarine was INS CHAKRA nd first nuclear submarine is INS ARIHANT..
http://americanhistory.si.edu/subs/history/timeline/cost/index.html
INS- Arihant (first indigenous nuclear powered submarine),, INS- chakra (first nuclear submarine).
The USS Nautilus (SSN-571) was the world's first operational nuclear submarine.