This depends on both the role (e.g. missile, attack, research) and class of the submarine. The only thing that defines a submarine as nuclear is that it derives its power from nuclear reactors, it does not need to carry nuclear weapons (although almost all do).
No.
No.
none
Yes, France has nuclear capabilities. It is one of the few countries in the world with a significant nuclear arsenal, including both nuclear weapons and nuclear power plants. France has a long history of nuclear development and maintains a deterrent nuclear force.
Never.
Nautilus
Nautilus
45 knots
Nothing at present, there was a referendum some years ago which resulted in all nuclear work ceasing.
No. Nicaragua is signatory of the Treaty of Tlatelolco, banning any nuclear weapons in Latin America. It also does not have any nuclear power plants.
Thomas B. Cochran has written: 'Nuclear Weapons Databook' 'U.S. nuclear forces and capabilities' -- subject(s): Nuclear weapons
Red Snow was developed by the United Kingdom.