The world now has 440 commercial nuclear reactors and 31 more under construction.
He said such an accident was simply not possible in any commercial reactor outside the Soviet Union.
Two units, named 1&2 are the oldest commercial nuclear reactors in India.
The country's first commercial nuclear reactor began operating in 1974.
Its 1.1 billion dollar cost included research equipment not needed for a commercial reactor.
There are plans to increase the number of commercial reactors from thirty one to fifty nine.
Finland has four commercial reactors, which provide 27% of the country's electricity.
Given this, it is entirely understandable why, although 109 commercial reactors are now operating around the country, not one has been ordered since 1978.
The regulation does not apply to the 104 commercial reactors now operating.
Typically, a large commercial reactor costs up to $4 billion.