Appendix1
Result of the investigation on Tsunami at Fukushima Daiichi Nuclear Power Station
We have conducted the investigation on Tsunami arrived at Fukushima Daiichi Nuclear Power Station generated by the Tohoku-Chihou-Taiheiyo-Oki Earthquake on March 11th, 2011.
Result of the investigation on height and area of inundation and run-up height are as follows. We did not consider the effect of diastrophism.
(1) Inundation height： Considering the vestiges on buildings and facilities, approximately O.P. +14 to 15 m (inundation depth:
approximately 4 to 5 m) in most of the ocean-side of main building area.
(2) Inundation area： Most of the ocean-side area (height of site: O.P. +4 m) and the main building area.
(3) Run-up height： Considering the vestiges in slope and surface of road, approximately O.P. +14.5 m.
Reactor building
Water intake 防波堤
Base level O.P.
0m
Predicted maximum water level caused by tsunami O.P.
5.7 m
● ●
DOOR
Turbine building
Door
● ●
Ocean-side area
Seawall
Inundation height
approximately +14～15 m
※Height of site of Unit 5 to 6 is O.P. +13 m Height in site O.P.
+10m(Unit 1～4)※
Main building area
Height in site O.P. +4m
Countermeasure implemented for 5.7m height
Seawater pump
Reactor building
Water intake 防波堤
Base level O.P.
0m
Predicted maximum water level caused by tsunami O.P.
5.7 m
● ●
● ●
DOOR
Turbine building
Door
● ●
● ●
Ocean-side area
Seawall
Inundation height
approximately +14～15 m
※Height of site of Unit 5 to 6 is O.P. +13 m Height in site O.P.
+10m(Unit 1～4)※
Main building area
Height in site O.P. +4m
Countermeasure implemented for 5.7m height
Seawater pump
Status of the damages caused by the tsunami at Fukushima Daiichi Nuclear Power Station（conceptual diagram）
Height and area of inundation and run-up height at Fukushima Daiichi Nuclear Power Station
▽ Ground level；O.P.+10m Inundation depth; 4～5m
（Assumed from discolored area of the building）
Inundation height; O.P.+14～15m Inundation depth; 4～5m
（Assumed from discolored area of the building）
Inundation height; O.P.+14～15m
▽ Ground level; O.P.+10m
One of the legible result of inundation height
（at point K）
One of the legible result of inundation height
（at point J）
