Timeline · 1966

The world's nuclear fleet in 1966

In 1966, 66 nuclear reactors were operating in 12 countries, 5.9 GWe net, with 47 under construction. 10 of those units are not included in the net capacity because no net figure has been published for them.

Compared with 1965, the operating fleet grew by 8 reactors. 8 reactors were connected to the grid that year, 1,250 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 (2,979 MWe), United States (972 MWe) and France (689 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	62
Sizewell A1	United Kingdom	GCR	Magnox	210
Sizewell A2	United Kingdom	GCR	Magnox	210
Fermi 1	United States	FBR	Liquid-metal-cooled FBR (Liquid Metal FBR)	60
Pathfinder	United States	BWR	—	59

Shut down in 1966

Unit	Country	Type	Model	MWe	Grid connection
Piqua	United States	—	Organically Cooled and Moderated Reactor (OCM) (OCM (Organically Cooled and Moderated Reactor))	12	1963

Countries by operating capacity in 1966

#	Country	Reactors	MWe	Under construction
1	United Kingdom	24	2,979	8
2	United States	15	972	11
3	France	6	689	5
4	Italy	3	563	—
5	Russia	8	304	2
6	Japan	2	149	1
7	Germany	3	129	6
8	Canada	1	22	4
9	Puerto Rico	1	17	—
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