Overview of facility of Fukushima Daiichi Nuclear Power Station

*We abolished the units 1-4 of Fukushima Daiichi Nuclear Power Plant on April 19, 2012 in accordance with the Electric Utility Industry Law article9.
*We abolished the units 5,6 of Fukushima Daiichi Nuclear Power Plant on January 31, 2014 in accordance with the Electric Utility Industry Law article9

			Unit 1	Unit 2	Unit 3	Unit 4	Unit 5	Unit 6
Main specifications	Electric output(MW)		460	784	784	784	784	1,100
	Start of Constraction Work		1967/9	1969/5	1970/10	1972/9	1971/12	1973/5
	Start of Commercial Operation		1971/3	1974/7	1976/3	1978/10	1978/4	1979/10
	Reactor type		Boiling Water Reactor(BWR)
	Type of PCV		Mark I					Mark II
	Domestic Content(%)		56	53	91	91	93	63
	Main contractor		GE	GE,Toshiba	Toshiba	Hitachi	Toshiba	GE,Toshiba
Nuclear reactor	Heat output(MW)		1,380	2,381				3,293
	Number of Fuel Assemblies Loaded(Pieces)		400	548				764
	Full length of Fuel Assemblies(m)		approx.4.35	approx.4.47				approx.4.47
	Number of Control rod(Pieces)		97	137				185
	Reactor Pressure Vessel (RPV)	Inner dia.(m)	approx.4.8	approx.5.6				approx.6.4
		Height(m)	approx.20	approx.22				23
		Total weight(ton)	440	500				750
	Primary Containment Vessel (PCV)	Height(m)	approx.32	approx.33		approx.34		approx.48
		Diameter of cylindrical portion(m)	approx.10	approx.11				approx.10(top)
		Diameter of spherical portion(m)	approx.18	approx.20				approx.25(bottom)
		Suppression pool Water Amount(ton)	1,750	2,980				3,200
Steam turbine	Number of Revolutions(rpm)		1,500
	Steam temp.(℃)		282
	Steam pressure(kg/cm²g)		66.8
Fuel	type		Uranium dioxide
	Uranium(ton)		69	94				132
	Fuel Assemblies		400	548				764