- 4 August, 1956 — First research reactor in Aisa, attained criticality at Trombay.
- 10 July, 1960 CIRUS — The 40 MWe research reactor attained criticality.
- 14 January, 1961 Research reactor ZERLINA attained criticality, (It was decomissioned in 1983).
- 2 October, 1969 Tarapore atomic power station started commercial operation.
- 18 May, 1972 Research reactor PURNIMA-1 attained critically.
- 30 November, 1972 Unit-1 of Rajasthan atomic power station at Kota began commercial operation.
- 1 November, 1980 Unit-2 of Rajasthan atomic power station went commercial.
- 27 January, 1984 Unit-1 of Madras atomic power station at Kalpakkam started commercial operation.
- 10 May, 1984 Research reactor PURNIMA-II, fuelled by Uranium-233, attained criticality.
- 8 August, 1985 Research reactor Dhruva (100MWe) attained criticality.
- 18 October, 1985 Fast Breeder Test Reactor (FBTR) at Kalpakkam attained criticality.
- 12 March, 1986 Units-2 of Madras atomic power station went commercial.
- 12 March 1989, Unit-1 of Narora atomic power station attained criticality.
- 9 November, 1990 Research reactor PURNIMA-III, a Uranium-233 fuelled reactor, attained criticality.
- 24 October, 1991 Unit-2 of Narora atomic power station attained criticality.
- 3 September, 1992 Unit-1 of Kakrapara atomic power station attaied criticality.
- 8 January, 1995 Unit-2 of Kakrapara atomic power station attained criticality.
- 20 October, 1996 Kalpakkam mini reactor (KAMINI), with Uranium-233 fuel, attained criticality at IGCAR, Kalpakkam.
- 24 September, 1999 Unit-2 of Kaiga atomic power station attained criticality.
- 24 December, 1999 Unit-3 of Rajasthan atomic power station attained criticality.
- 26 September, 2000 Unit-1 of Kaiga atomic power station attained criticality.
- 3 November, 2000 Unit-4 Rajasthan atomic power station attained criticality.
- 22 December, 2009-PHWR (202 MWe) Rajasthan atomic power station attained criticality.
- 28 March, 2010-PHWR (202 MWe) Rajasthan atomic power station attained criticality.
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