Due to the affect of tsunami accompanied by the earthquake on March 11, 2011, the relevant events under the Act on Special Measures Concerning Nuclear Emergency Preparedness occurred at each of Units 1, 2 and 4 in Fukushima Daini Nuclear Power Station. On March 12 2011, the declaration of a Nuclear Emergency Situation was issued by the Prime Minister.
After that, emergency response measures were taken such as restoring electric motors and recovering the function of residual heat removal pumps. Cold shut down has been achieved for each of the unit by March 15.
Thereafter, those emergency response measures had been continuously taken, and also TEPCO endeavored to maintain stable cold shut down status of the plant, multiplexing power supply function and residual heat removal function. As a result, on December 26, Nuclear Emergency Situation was lifted by the Prime Minister, and TEPCO moved onto the phase to implement the post nuclear disaster incident measurement.
Implementing those countermeasures, TEPCO has established the restoration plan based on the nuclear plant operator's anti- disaster measures operation plan. TEPCO submitted the plan to the Minister of Economy, Trade and Industry, and the governors of Fukushima prefecture, Naraha town, and Tomioka town on January 31, 2012.

TEPCO will continue to restore facilities for the cold shut down of the plants etc based on this plan to improve the reliability further.

We announce the plant status as of 3:00 pm today per the following and the attachment (the updates are underlined parts).

○Confirmation of contamination by radioactive materials in the Unit 3 and 4 Service Buildings.[Update]
After the investigation, it was confirmed that the contamination on the table next to the small monitor in the check point was due to the spilled sample (water). The spilled amount was approx. 2.5 cc and the surface contamination concentration was approx. 206Bq/cm2 according to the measurement by the contamination survey meter.
During the investigation for the contamination in the entire route of sample transportation, 7 spots were confirmed to be contaminated (max above 700Bq/cm2). In order to prevent expansion of the contamination, 4 spots were decontaminated and 3 spots were temporarily put under control.
While inside of the vehicle transported such sample was also confirmed to be contaminated, outside surface of the vehicle nor the entrance area of the service building were not contaminated. Therefore, it is considered that the contamination is limited in the service building of Unit 3 and 4.

(Previously announced March 27, 2012)

*non-controlled area
Controlled area is the area which requires control for prevention of unnecessary exposure and prevention of increase of radioactive contamination. Non-controlled area is the area other than controlled area.

Appendix: TEPCO Plant Status of Fukushima Daini Nuclear Power Station