About Fukushima Daiichi NPS

Overview of Fukushima Daiichi nuclear power station

Unit	Unit1	Unit2	Unit3	Unit4	Unit5	Unit6
Reactor type	BWR-3	BWR-4	BWR-4	BWR-4	BWR-4	BWR-5
Primary containment vessel	Mark-1	Mark-1	Mark-1	Mark-1	Mark-1	Mark-2
Rated electric output	460 MWe	784 MWe	784 MWe	784 MWe	784 MWe	1,100 MWe
Commissioned date	26 March 1971	18 July 1974	27 March 1976	12 October 1978	18 April 1978	24 October 1979
Decommissioned date	19 April 2012	19 April 2012	19 April 2012	19 April 2012	31 January 2014	31 January 2014
Status at the earthquake attack	Operating	Operating	Operating	Scheduled outage	Scheduled outage	Scheduled outage

Plant specifications

Unit 1

No.	Title	Description	Provided by	Date of update	Download
1	Plant Specifications	Plant specifications of Unit 1	TEPCO	20 December 2012

Unit 2

No.	Title	Description	Provided by	Date of update	Download
1	Plant Specifications	Plant specifications of Unit 2	TEPCO	20 December 2012
2		Diagram of RCIC quencher in Unit 2	TEPCO	30 October 2013
		Diagram of RCIC strainer in Unit 2
		Diagram of T-quencher in Unit 2

Unit 3

No.	Title	Description	Provided by	Date of update	Download
1	Plant Specifications	Plant specifications of Unit 3	TEPCO	20 December 2012
2		Diagram of HPCI quencher in Unit 3	TEPCO	30 October 2013
		Diagram of RCIC quencher in Unit 3 Unit 3
		Diagram of T-quencher in Unit 3