Print

Language



Corporate Information

 
Press Release (Mar 11,2011)
Occurrence of a Specific Incident Stipulated in Article 15, Clause 1 of the Act on Special Measures Concerning Nuclear Emergency Preparedness(Fukushima Daiichi)
Today at approximately 2:46PM, turbines and reactors of Tokyo Electric 
Power Company's Fukushima Daiichi Nuclear Power Station Unit 1 (Boiling 
Water Reactor, rated output 460 Megawatts) and Units 2 and 3 (Boiling 
Water Reactor, Rated Output 784 Megawatts) that had been operating at 
rated power automatically shutdown due to the Miyagiken-oki Earthquake.

For the above 3 units, off-site power was lost due to malfunction of one 
out of two off-site power systems, leading to automatic startup of 
emergency diesel generators.

Subsequently, at 3:41PM, emergency diesel generators shutdown due to 
malfunction resulting in the complete loss of alternating current for all 
three units.

Hence, at 3:42PM, it was decided that a specific incident stipulated in 
Article 10, Clause 1 of the Act on Special Measures Concerning Nuclear 
Emergency Preparedness has occurred and a "First Level Emergency" was 
declared and in accordance with the aforementioned Act, the Minister of 
Economy, Trade, and Industry, the Governor of Fukushima Prefecture, the 
Mayor of Okuma Town, and the Mayor of Futaba Town along with other 
involved organizations were notified of the incident.

TEPCO is taking steps to determine the exact cause behind the shutdown of 
the emergency diesel generators and is working towards their restoration.

(already notified)
Subsequently, since the status of reactor water coolant injection could 
not be confirmed for the emergency core cooling systems of Units 1 and 2, 
at 4:36PM, it was decided that a specific incident stipulated in Article 
15, Clause 1 of the Act has occurred.

We have then notified the Minister of Economy, Trade, and Industry, the 
Governor of Fukushima Prefecture, the Mayor of Okuma Town, and the Mayor 
of Futaba Town along with other involved organizations of the incident.

Article 15, Clause 1 of the Act was cleared when the reactor water level 
monitoring function was restored for Unit 1. However, at 5:07PM, specific 
incident stipulated in Article 15, Clause 1 of the Act was applied again 
for Unit 1. 
back to page top