Unit 2
-At 2:59 pm on September 14, we started injecting water to the reactor through core spray system water injection piping arrangement in addition to the water injection through the reactor feed water system piping arrangement. Water is currently injected at approx. 3.8 m3/h through reactor feed water system piping arrangement, while the water injection through the core spray system water injection piping arrangement is under adjustment.
At 11:8 am on September 14, we stopped the operation of cooling facilities of common pool because the common pool power center will be moved with the replace of power panel located at the basement of the spent fuel common pool's building.
-At approx. 12:40 pm on September 14, 6 partner company's workers, who maintained water treatment faculties, conducted contamination check of full-face masks when they returned from the work site to 1F's Main Anti-Earthquake Building. As a result, inner side of the filter for 4 out of the 6 workers were confirmed to be contaminated. We will confirm whether the 6 workers might have absorbed contaminated materials inside of their bodies using whole body counter.
At approximately 12:40 pm on September 14, we found the inside of full-face masks, which were used by 4 out of 6 partner company workers, contaminated when we were checking the contamination of the masks used in maintenance work of the water treatment system. Then, as a result of the measurement by whole body counter, we have confirmed that no one took in radioactive materials.
- At approximately 4 pm on September 14, a TEPCO employee who returned from the patrol on the generators of Unit 1 - 4 (outdoors) to Visitors Hall of Fukushima Daini Nuclear Power Station got decontaminated since contamination at his chin and neck was detected. Then as a result of the measurement by whole body counter, we have evaluated that no radioactive materials was taken in.
- At approximately 8:18 am on September 15, we found a partner company worker unequipped with a charcoal filter to the full-faced mask after the worker entered the site of Fukushima Daiichi Nuclear Power Station. We will check by whole body counter if he took in radioactive materials.
- At 10 am on September 15, we started transfer of accumulated water from the turbine building of Unit 6 to the temporary tank.
* From 9:15 am to 0:10 pm on September 14, we sampled gases in the Reactor Pressure Vessel of Reactor Building, Unit 1.
* At 9:47 am on September 14, we stopped the Spent Fuel Pool's desalination system of Unit 4 to install an electric dialysis equipment. At 0:25 pm on the same day, the desalination system resumed while we continued operation of an alternative system to cool down the pool.
* At 9:53 am on September 14, we stared transfer of the accumulated water from the condenser to the basement of Turbine Building of Unit 1.
* At 11:08 am on September 14, the Common Pool's cooling system was shutdown to move a Common Pool Power Center so that we will replace a power panel installed at the basement of Spent Fuel Common Pool.
* . At 2:59 pm on September 14, we started injecting water to the reactor through core spray system water injection piping arrangement in addition to the water injection through the reactor feed water system piping arrangement. At 3:25 pm on the same day, we adjusted the volume water at 1.0 m3/h. The volume of water injected from the feed water system remains unchanged Water is currently injected at approx. 3.8 m3/h through reactor feed water system piping arrangement, while the water injection through the core spray system water injection piping arrangement is under adjustment.
* At 0:40 pm on September 1, we found 4 out of 6 partner company workers contaminated when we were decontaminating the full-face masks of the workers who were engaged in maintenance work of the water processing system. By the use of whole body counter, we will check if they have take in radioactive materials.
* At 6:07 pm on September 13, as it was confirmed that there was a decrease in the amount of water injection for the reactor of unit 1, we adjusted the rate of water injection to approx. 3.8 m3/h.
* At 6:07 pm on September 13, as it was confirmed that there was a decrease in the amount of water injection for the reactor of unit 2, we adjusted the rate of water injection to approx. 3.8 m3/h.
* From 10:00 am to 4:00 pm on September 13, we transferred accumulated water from the basement of Unit 6 reactor building to the temporary tank.
At 10:00 am on September 11, we started transferring accumulated water from the turbine building of Unit 3 to the High Temperature Incinerator Building of Centralized Radiation Waste Treatment Facility. After the temporary interruption for the confirmation of the system constitution, we changed the transfer route and started transferring to Process Building of Centralized Radiation Waste Treatment Facility.
- At 9:51 am on September 13, we started transferring accumulated water from the turbine building of Unit 2 to High Temperature Incinerator Building of Centralized Radiation Waste Treatment Facility.
- At 3:58 am on September 13, we stopped the cesium absorption instrument and the decontamination instrument for the maintenance of the water treatment facility. Then, after the completion of the maintenance work, we restarted the treatment of the accumulated water at 7:20 pm on September 14.
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