Effect to the Nuclear Facilities from the earthquake on east area of Japan

Print View Posted on: 18 March 2011

14:46 (UTC 5:46) March 11, an earthquake hit east area of Japan. Summary of earthquake and current status of each nuclear facility is as follows;

1. Summary of Earthquake

(1) Time of Occurrence: 14:46 (UTC 5:46) March 11, 2011, Friday
(2) Epicenter: Off-Coast of Sanriku (North Latitude: 38; East Longitude: 142.9), 10km deep, M8.8

2. The status of operation at Power Stations(Number of automatic shutdown(units): 10 (as of 00:30(UTC:11:46), March12)

a. Onagawa Nuclear Power Station (Onagawa-machi and Ishinomaki–shi, Miyagi Prefecture)
(1) The status of operation
Unit 1 (524MWe): automatic shutdown
Unit 2 (825MWe): automatic shutdown
Unit 3 (825MWe): automatic shutdown
(2) Readings of monitoring post etc.
Variation in the monitoring post readings: No
Variation in the main stack monitor readings: No
(3) Report concerning other malfunction
Report of fire: CO2 extinguishment started at 17:15

b. Fukushima Dai-ichi Nuclear Power Station, Tokyo Electric Power Co.,Inc.(TEPCO) (Okuma-machi and Futaba-machi, Futaba-gun, Fukushima Prefecture )
(1) The status of operation
Unit 1 (460MWe): automatic shutdown
Unit 2 (784MWe): automatic shutdown
Unit 3 (784MWe): automatic shutdown
Unit 4(784MW): in periodic inspection outage
Unit 5(784MW): in periodic inspection outage
Unit 6(1,100MW): in periodic inspection outage
(2) Readings at monitoring post etc.
Variation in the monitoring post readings: No
Variation in the main stack monitoring readings: No
(3) Report concerning other malfunction
Article 10* of Act on Special Measures Concerning Nuclear Emergency Preparedness (Fukushima Dai-ichi, Unit 3)
(*A heightened alert condition)
Article 15** of Act on Special Measures Concerning Nuclear Emergency Preparedness (Fukushima Dai-ichi, Units 1 and 2)
(** Nuclear emergency situation)
Situation of power source to recover water injection function at the Station.
Three or four electric power source cars are waiting in the premise. Part of cable was obtained and connecting work is under way. This work is done with paying attention to tsunami. (2:00, March 12)
Pressure in the Confinement Vessel has arisen. The pressure could have arisen to 600kPa as compared to the design pressure of 400kPa.

c. Fukushima-Daini Nuclear Power Station(TEPCO)
(Naraha-cho/Tomioka-cho, Futaba-gun, Fukushima pref.)
(1) The status of operation
Unit1(1,100MW): automatic shutdown
Unit2(1,100MW): automatic shutdown
Unit3(1,100MW): automatic shutdown
Unit4(1,100MW): automatic shutdown
(2) Readings at monitoring post etc.
Variation in the monitoring post readings: No
Variation in the main stack monitoring readings: No
(3) Report concerning other malfunction
Report of fire: No
Article 10* of Act on Special Measures Concerning Nuclear Emergency Preparedness (Fukushima Dai-ni, Units 1,2 and 4)
(*A heightened alert condition)