The Fukushima Event: The Outline and the Technological Background

Table 1

Key features of the Fukushima Units 1 to 4.

Unit No	Type*	Power MWe/MWth	Construction Company	Start Operation (year)	No of FA (−)	CO design p (MPa)	No of DG (−)
1	BWR-3 MARK-I	460/1380	GE	1971	400	0.43	2
2	BWR-4 MARK-I	784/ 2381	GE	1974	548	0.38
3			Toshiba	1976
4			Hitachi CO.	1978

* Reactor (above) and Containment (below) type.