Timeline · 1966

The world's nuclear fleet in 1966

In 1966, 67 nuclear reactors were operating in 12 countries, 6.5 GWe net, with 47 under construction.

Compared with 1965, the operating fleet grew by 8 reactors. 8 reactors were connected to the grid that year, 1,251 MWe, mostly in Germany (3), United Kingdom (2) and United States (2). 1 unit was permanently shut down, 12 MWe. The countries with the most operating capacity were United Kingdom (3,009 MWe), United States (1,001 MWe) and Russia (905 MWe).

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Connected to the grid in 1966

Unit	Country	Type	Model	MWe
Chinon A-3	France	GCR	UNGG	360
Gundremmingen A	Germany	BWR	GE, BWR-1	237
MZFR	Germany	PHWR	—	52
Rheinsberg	Germany	PWR	VVER-70	62
Sizewell A1	United Kingdom	GCR	MAGNOX	210
Sizewell A2	United Kingdom	GCR	MAGNOX	210
Fermi 1	United States	FBR	—	61
Pathfinder	United States	BWR	BWR-1	59

Shut down in 1966

Unit	Country	Type	Model	MWe	Grid connection
Piqua	United States	—	Atomics International	12	1963

Countries by operating capacity in 1966

#	Country	Reactors	MWe	Under construction
1	United Kingdom	24	3,009	8
2	United States	16	1,001	11
3	Russia	8	905	2
4	France	6	696	5
5	Italy	3	563	—
6	Japan	2	149	1
7	Germany	3	130	6
8	Canada	1	22	4
9	Puerto Rico	1	18	—
10	Belgium	1	10	—
11	Sweden	1	10	1
12	Switzerland	1	6	1
13	India	0	0	3
14	Kazakhstan	0	0	1
15	Netherlands	0	0	1
16	Pakistan	0	0	1
17	Slovakia	0	0	1
18	Spain	0	0	1