Fukushima Daiichi Nuclear Power Plant
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![Cross-section sketch of a typical BWR Mark I containment, as used in Units 1 to 5. The reactor core (1) consists of fuel rods and moderator rods (39) which are moved in and out by the device (31). Around the pressure vessel (8), there is an outer containment (19)
which is closed by a concrete plug (2). When fuel rods are moved in or out, the crane (26) will move this plug to the pool for facilities (3). Steam from the dry well (11) can move to the wet well (24) through jet nozzles (14) to condense there (18). In the spent fuel pool (5), the used fuel rods (27) are stored. .](/Images/godic/202501/14/Reaktor.svg4017.png")
![Aerial view of the plant area in 1975, showing separation between Units 5 & 6, and the majority of the complex.・Unit 6 : direction of Sōma.・Unit 4 : direction of Iwaki.](/Images/godic/202501/14/Fukushima_I_NPP_1975_medium_crop_rotated_labeled4017.jpg")
The Fukushima Daiichi Nuclear Power Plant(福島第一原子力発電所Fukushima Daiichi Genshiryoku Hatsudensho) is a disabled BWR nuclear power plant located on a 3.5-square-kilometre (860-acre) site in the towns of Ōkuma and Futaba in the Futaba District of Fukushima Prefecture, Japan. First commissioned in 1971, the plant consists of six boiling water reactors (BWR). These light water reactors drove electrical generators with a combined power of 4.7 GWe, making Fukushima Daiichi one of the 15 largest nuclear power stations in the world. Fukushima was the first nuclear plant to be designed, constructed and run in conjunction with General Electric, Boise, and Tokyo Electric Power Company (TEPCO).