Fukushima Daiichi units 4, 5 and 6, Nuclear reactor units in Okuma and Futaba, Japan
Fukushima Daiichi units 4, 5 and 6 are reactor blocks located along the coast of Fukushima Prefecture, equipped with cooling systems and containment structures. The site sits in a seismically active area along the Pacific coast and consists of several large industrial buildings with towers and piping systems.
The site began operations in the 1970s and generated power for eastern Japan. The 2011 earthquake and tsunami caused a hydrogen explosion in unit 4, while the other units were offline due to scheduled maintenance at the time.
The status of these nuclear units influences local community perspectives on nuclear energy, leading to sustained discussions about energy policies in Japan.
The site is under strict access restrictions and monitoring, preventing general public entry. Visitors can only view the area from designated distant points or participate in organized tours if made available by authorities.
The fuel from unit 4 was completely removed and transported to separate storage pools, representing a major step in decontamination efforts. This action helped reduce the risk of another hydrogen buildup in that block.
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