The 50 oldest nuclear reactors still operating in 2026

The 50 operating nuclear reactors with the most years since grid connection, among the 443 operating today.

The oldest nuclear reactor still operating is Tarapur 1, in India, connected in 1969: 57 years in service. 36 reactors connected before 1975 are still operating. By country, the veterans are mostly in United States (37), Russia (3) and Japan (3).

#	Unit	Country	Type	MWe	Grid connection	Years in service
1	Tarapur 1	India	BWR	150	1969	57
2	Tarapur 2	India	BWR	150	1969	57
3	Beznau 1	Switzerland	PWR	365	1969	57
4	Nine Mile Point 1	United States	BWR	613	1969	57
5	Robert Emmett Ginna	United States	PWR	560	1969	57
6	Dresden 2	United States	BWR	894	1970	56
7	H. B. Robinson 2	United States	PWR	741	1970	56
8	Point Beach 1	United States	PWR	591	1970	56
9	Monticello	United States	BWR	628	1971	55
10	Dresden 3	United States	BWR	879	1971	55
11	Beznau 2	Switzerland	PWR	365	1971	55
12	Quad Cities 1	United States	BWR	908	1972	54
13	Quad Cities 2	United States	BWR	911	1972	54
14	Surry 1	United States	PWR	838	1972	54
15	Point Beach 2	United States	PWR	591	1972	54
16	Turkey Point nuclear power station 3	United States	PWR	837	1972	54
17	Novovoronezh 1-4	Russia	PWR	385	1972	54
18	Surry 2	United States	PWR	838	1973	53
19	Oconee 1	United States	PWR	847	1973	53
20	Turkey Point nuclear power station 4	United States	PWR	821	1973	53
21	Kola 1-1	Russia	PWR	411	1973	53
22	Borssele 1	Netherlands	PWR	482	1973	53
23	Browns Ferry 1	United States	BWR	1,200	1973	53
24	Prairie Island 1	United States	PWR	522	1973	53
25	Oconee 2	United States	PWR	848	1973	53
26	Peach Bottom 2	United States	BWR	1,300	1974	52
27	Atucha 1	Argentina	PHWR	335	1974	52
28	Takahama 1	Japan	PWR	780	1974	52
29	Cooper	United States	BWR	769	1974	52
30	Arkansas Nuclear One 1	United States	PWR	836	1974	52
31	Browns Ferry 2	United States	BWR	1,200	1974	52
32	Peach Bottom 3	United States	BWR	1,331	1974	52
33	Oconee 3	United States	PWR	859	1974	52
34	Edwin I Hatch 1	United States	BWR	876	1974	52
35	Kola 1-2	Russia	PWR	411	1974	52
36	Prairie Island 2	United States	PWR	519	1974	52
37	Calvert Cliffs 1	United States	PWR	877	1975	51
38	Takahama 2	Japan	PWR	780	1975	51
39	James A Fitzpatrick	United States	BWR	813	1975	51
40	Donald C Cook 1	United States	PWR	1,030	1975	51
41	Brunswick 2	United States	BWR	932	1975	51
42	Millstone 2	United States	PWR	869	1975	51
43	Mihama 3	Japan	PWR	780	1976	50
44	St. Lucie 1	United States	PWR	981	1976	50
45	Beaver Valley 1	United States	PWR	908	1976	50
46	Bruce A2	Canada	PHWR	817	1976	50
47	Browns Ferry 3	United States	BWR	1,210	1976	50
48	Brunswick 1	United States	BWR	938	1976	50
49	Calvert Cliffs 2	United States	PWR	855	1976	50
50	Salem 1	United States	PWR	1,169	1976	50

Data: Global Energy Monitor (CC BY 4.0), IAEA PRIS 2025, Wikipedia (CC BY-SA), Wikidata and Wikimedia Commons. Capacities in net MWe unless stated.

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