See the list in link below
There are six nuclear power stations in India, with a total of seventeen nuclear reactors in them. There are also six research and production reactors, but such reactors are not usually included in counts of reactors in a country because they are small and do not typically put power on the electric grid.
_______________________________________________________
An updated AnswerThere are 21 operating power reactors in India (with total electric power 5308 MW) and 6 nuclear power reactors under construction (with total electric power 3907 MW) per the statistics of the International Atomic Energy Agency as of April 2004.As of 2010, India has 20 Nuclear Reactors.
There are currently (year 2013) 31 countries having nuclear power reactors. The rest are not having nuclear power.
As of 2010, There are six nuclear power plants, comprising 20 reactors, in India. For further information, please consult the Related Links, below.
Sweden currently has 3 active nuclear power plants with 10 reactors.
104 operating power reactors
There are 100 nuclear power reactors operating in USA besides five under construction as of July 2014.
104 operating reactors
104 operating reactors
Total of 104 reactors, most sites have two reactors
Most plants have two reactors but some have more
As of end of August 2013, there are 434 working nuclear power reactors (with total rated power 370.543 Gigawatt plus 69 nuclear power reactors under construction (with total rated power 67.196 Giagawatt).
Reactors power submarines and many surface ships. Nuclear weapons.