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There
are many ships and submarines using nuclear propulsion. However,
most of them are military.
A nuclear reactor
can produce a lot of energy from a very small
amount of fuel and at the same time does not need air for
combustion. This is particulary useful for submarines, which can
stay under water for many months without needing extra fuel or
air.
The
Norwegian non-governmental organization Bellona estimated that the following number of nuclear
vessels existed in the world in
1996:
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