Due to the Tohoku-Chihou-Taiheiyou-Oki Earthquake which occurred on March
11, 2011, TEPCO's facilities including our nuclear power stations have
been severely damaged. We deeply apologize for the anxiety and
inconvenience caused.
With regard to the accident at Fukushima Daiichi Nuclear Power Station, on
April 17, 2011, we have compiled the roadmap towards restoration from the
accident and on July 19 we accomplished the Step1 target "Radiation dose
is in steady decline". Then on December 16 we confirmed the accomplishment
of the Step 2 target "Release of radioactive materials is under control
and radiation doses are being significantly held down".
In addition, on December 21, 2011, we have compiled the "Mid-to-long-Term
Roadmap toward the Decommissioning of Fukushima Daiichi Nuclear Power
Units 1-4, TEPCO".
In addition to the maintenance of the plant's stable condition, we will
implement Mid-to-Long Term countermeasures towards the decommissioning of
Fukushima Daiichi Nuclear Power Units 1-4 to enable evacuees to return to
their homes as soon as possible and reduce the anxiety of the people in
Fukushima and the whole nation as soon as possible.
Below is the status of TEPCO's major facilities.
* The updates are underlined. [Nuclear Power Station]
· Fukushima Daiichi Nuclear Power Station: Unit 1 to 3: shut down due to
the earthquake:
(Units 4 to 6: outage due to regular inspections before the earthquake)
* With regard to the thermometer placed at the lower part of RPV (top of
the lower head 135°) whose trend which showed a different trend while
others showed the increasing trend after we decreased the water
injection rate to the Unit 2 Reactor from the feed water system on
February 22, we reported to Nuclear and Industrial Safety Agency of
Ministry of Economy, Trade and Industry on March 1. We will continue
monitoring this thermometer.
·At 11:00 am on March 11, the temperature of the lower part of the RPV
(top of the lower head 135°) : approx. 41.2 °C
·At 11:00 am on March 11, the temperature of the lower part of the RPV
(top of the lower head 270°) : approx. 40.1 °C (reference)
* Around 10:00 am on March 11, 2012, TEPCO's employees found the water
leaks from the ceiling near the wall of the west side in the heater room
at 1st floor of T/B of Unit 1 during their sampling work for the
accumulated water. The puddle of water at the floor is approx. 5m x 7m
and it was found the water flows into the nearby funnel*. As the result
of the inspection, it was found that the water comes from the damaged
part of the pipe, "the roof drain pipe", which is set at the upper of
the ceiling and we assumed that the water was rain or melted snow. The
radioactivity concentration of the water was Cs-134:1.1x101Bq/cm3 and
Cs-137:1.7x101Bq/cm3. The leakage water was held in the underground of
T/B as the accumulated water and it is considered that there is no
leakage to the ocean.
*drain to gather and lead the water from the pipe or facilities in the
building in order to prevent water from leaking into the floor.
· Fukushima Daini Nuclear Power Station:
Units 1 to 4: shutdown due to the earthquake
· Kashiwazaki Kariwa Nuclear Power Station:
Units 6: under normal operation
(Units 1 to 5 and 7: outage due to regular inspections) [Thermal Power Station]
· Power supply has returned to normal and the facilities damaged by the
earthquake are now being handled in a timely manner. [Hydro Power Station]
· Power supply has returned to normal and the facilities damaged by the
earthquake are now being handled in a timely manner. [Impacts on Transmission Facilities]
· Power supply has returned to normal and the facilities damaged by the
earthquake are now being handled in a timely manner. [Impacts on Power Supply and Demand Balance]
We expect to maintain stable power supply in March.
Daily supply and demand balance is announced at our "TEPCO Electricity
Forecast".
Appendix: Past Progress (As of 3:00 pm on March 11, 2012) (PDF 471KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress
