All 6 units of Fukushima Daiichi Nuclear Power Station have been shut down.
Unit 1(Shut down)
- Reactor has been shut down. However, the unit is under inspection due
to the explosive sound and white smoke that was confirmed after the big
quake occurred at 3:36PM.
- Also, we have been injecting sea water into the reactor core and then
boric acid which absorbs neutron. However, we tentatively ceased the
operation factoring in the impact of potential tsunami following the
earthquake which occurred at 10:15PM.
Unit 2(Shut down)
- Reactor and Reactor Core Isolation Cooling System have been shut down.
Current reactor water level is lower than normal level, but the water
level is steady. After fully securing safety, we are preparing to
implement a measure to reduce the pressure of the reactor containment
vessels under the instruction of the national government.
Unit 3(Shut down)
- Reactor has been shut down and we continue injecting water by High
Pressure Core Injection System. After fully securing safety, we are
preparing to implement a measure to reduce the pressure of the reactor
containment vessels under the instruction of the national government.
- Currently, we do not believe there is any reactor coolant leakage
inside the reactor containment vessel.
Unit 4 (shut down due to regular inspection)
- Reactor has been shut down and sufficient level of reactor coolant to
ensure safety is maintained.
- Currently, we do not believe there is any reactor coolant leakage
inside the reactor containment vessel.
Unit 5 (outage due to regular inspection)
- Reactor has been shut down and sufficient level of reactor coolant to
ensure safety is maintained.
- Currently, we do not believe there is any reactor coolant leakage
inside the reactor containment vessel.
Unit 6 (outage due to regular inspection)
- Reactor has been shut down and sufficient level of reactor coolant to
ensure safety is maintained.
- Currently, we do not believe there is any reactor coolant leakage
inside the reactor containment vessel.
- Currently, we are implementing a measure to reduce the pressure of the
reactor containment vessels of Unit 1. We have confirmed that the
radiation exposure of 1 TEPCO employee, who was working inside the
reactor building, exceeded 100mSv (106.3mSv). Because of the absence of
industrial physician, we were scheduling diagnosis later. However, we
had him diagnosed by a specialist physician at the off-site center
because of the deconditioning.
- We measured radioactive materials inside of the nuclear power station
area (outdoor) by monitoring car and confirmed that radioactive
materials level is higher than ordinary level. Also, the level at
monitoring post is higher than ordinary level.
We will continue to monitor in detail the possibility of radioactive
material being discharged from exhaust stack or discharge canal.
The national government has instructed evacuation for those local
residents within 20km radius of the periphery because it's possible
that radioactive materials are discharged.
Two workers of a cooperative firm were injured in the nuclear power
station premise. One with a broken bone was transported to the hospital
by an ambulance and the other by a company car.
Further, there are 2 TEPCO employees whose presence has not been
confirmed.
In addition, one subcontract worker standing near important earth
quake-proof buidling was unconscious and transported to the hospital
by an ambulance. When explosive sound was confirmed around the Unit 1
followed by white smoke, 4 workers were injured and transported to the
hospital.
We will continue to take all measures to restore the security of the
site and to monitor the environment of the site periphery.