December 17, 2018 Tokyo Electric Power Company Holdings, Inc.

Transcription

1 Situation of and Treatment of ccumulated Water including Highly Radioactive Materials at Fukushima Daiichi Nuclear Power Station (383rd Release) December 7, 8 Tokyo Electric Power Company Holdings, Inc.. Introduction This document is to report the following matters in accordance with the instruction of Installment of and storing facility of water including highly concentrated radioactive materials at Fukushima Daiichi Nuclear Power Station of the Tokyo Electric Power Company (Instruction) (NIS No. 6, June 8, ), dated on June 9,. <Instruction> TEPCO should report to NIS the situation of storing and treatment of the contaminated water in the Power Station and the future forecast based upon the current situation has to be reported to NIS as soon as the starts its operation. lso, subsequently, continued report has to be submitted to NIS once a week until the treatment of the accumulated water in the Central Radioactive Waste Treatment Facility is completed.. Situation of storing and treatment of accumulated water in the building (actual record) Stored amounts in each unit building (Units to 4 (including condensers and trenches)) and stored and treated amounts, and other related data in the ccumulated Water Storing Facility as of December 3, 8, are shown in the ttachment. 3. Forecast of storing and treatment () Short term forecast Water transfer in Units and and Units 3 and 4 is planned based on the stored amount in the ccumulated Water Storing Facilities and the operating situation of the radioactive material treatment equipment and the subdrain catchment facility. Water is transferred to the Process Main Building andor High Temperature Incinerator Building as ccumulated Water Storing Facilities. Treatment is implemented considering the state of storage and transfer of ccumulated Water Storing Facilities. We assume stored amounts in each unit building (Units to 4 (including condenser and trench)), and stored and treated amounts, and other related data in the ccumulated Water Storing Facilities as of December, 8, are shown in ttachment.

2 () Middle term forecast Regarding accumulated water in Units and buildings and Units 3 and 4 buildings, from the viewpoint of reducing the risks of discharging to the ocean and leaking into the groundwater, it is necessary to keep enough capacity for the accumulated water in the building until its level reaches TP.,564 and to keep the accumulated water level lower than the groundwater level. On the other hand, based on the view of limiting inflow of underwater to buildings and reducing the amount of emerged accumulated water, we are planning to transfer accumulated water keeping specific waterlevel difference between accumulated water in the building around and subdrain water and making the lowest floor surface of buildings other than Units to 3 reactor buildings where circulating water is injected into exposed by. s for accumulated water of the Process Main Building and the High Temperature Incinerator Building, we are planning to treat the accumulated water considering the situation of construction of middle and low level waste water tanks, the operation factor of the radioactive material treatment instruments and duration for maintenance. We forecast stored amounts in each unit building (Units to 4 (including condensers and trenches)), and storing and treatment situations in the ccumulated Water Storing Facilities for the next 3 months, as shown in ttachment 3. Stored amounts in each building and the water storage equipment are forecasted to be unchanged in case transfer and treatment were implemented as scheduled without rain. However, it would be subject to change depending on the operation factor of the radioactive material treatment instruments and so on. lso, the water treated at the radioactive material treatment equipment (fresh water and condensed salt water) can be stored in the middle and low level waste water tanks. END

3 last Volume of water to be injected to Reactor (63) report Filtrate water Treated water and treatment of high level radioactive accumulated water (as of December 3, 8) (freshwater),45m 3 + m 3 Cumulative treated water 97,578m 3 Classification saltwater High level radioactive water Waste, waste liquid receiving tank* m 3 Exit of decontamination facility ttachment volume *, capacity *3,4 Treated water (saltwater) Freshwater receiving tank 5,8m 3 83m 3,6m 3 waste Treated water (concentrated saltwater), pipe removal 9,3m 3 m 3,7m 3 liquid storage tank water Treated water storage tank Multinuclide Removal Treated water 986,9m 3 +,973m 3,7,7m 3 Treated water (freshwater), pipe removal Treated water Equipment ( saltwater) storage tank 6,45m 3 48m 3 35,5m 3 Treated water from Multinuclide Removal Facility To Freshwater capacity* 3,4 Reactor building Reactor Pressure Vessel Primary Containment Vessel Unit : 68m 3 day,fdw CS Unit : 67m 3 day,fdw CS Unit 3: 67m 3 day,fdw CS Filtrate Tank Water injection tank (CST) (Buffer tank) Turbine building waste liquid Condenser Evaporative concentration apparatus Reverse osmosis treated water (Freshwater) Reverse osmosis circulation facility inside (High temperature incinerator building) Centralized radioactive waste (Process main building) Desalination plant (Reverse osmosis) supply tank SPT(B) Treatment facility (Cesium adsorption apparatus) (nd Cesium adsorption apparatus) (Decontamination facility) Waste Residual water *5 saltwater tank pprox. 5m 3 No Change pprox.,m 3 water tank pprox. 5,7m 3,m 3 pprox. 49,5m 3 volume volume*3 supply tank 73m 3 + 6m 3,m 3 SPT(B) 68m 3 6m 3 3,m 3 Beforefter Desalination 3ppmppm (Sampled on November ) Beforefter Reverse Osmosis Circulation 34ppm4ppm (Sampled on November 9) Beforefter Evaporative Concentration Chloride concentration Place of Sampling Radioactivity concentration *6 Process Main Building 6.6E+7 BqL (Sampled on November 7) Exit of cesium adsorption apparatus 8.9E+ BqL (Sampled on February ) High Temperature Incinerator Building.3E+8 BqL (Sampled on May 4) Exit of second cesium adsorption apparatus 5.8E+ BqL (Sampled on November 7) From Facility volume Water level in TB * 8 facility volume T.P.,538 Unit pprox.,4m 3 4m 3 Process Main Building pprox.,39m 3 + 9m 3 T.P. 6 T.P. 56 Unit pprox. 8,3m m 3 High Temperature Incinerator Building pprox.,9m 3 46m 3 Water level Treated volume * 8 (63) pprox.,57m 3 *7 Cumulative treated volume pprox.,5,6m 3 *7 Waste produced capacity Sludge 597m 3 No Change 7m 3 *3 Used vessels 4,3 *9 +5 6,37 T.P. 3 Unit 3 pprox. 8,4m 3 No Change Total pprox. 4,3m 3 Unit 4 pprox. 8,88m 3 No Change Total pprox. 7,83m 3 T.P. 35 [Main operations that have been conducted during the period from November December 4, 6, 8 6 (the previous announcement data) to todecember 3,, 6] 8.] Water transfer from the Units 4 Reactor the Building buildings to (Units the High 4, Temperature Centralized Incinerator radioactive Building waste treatment and the Process facility) and Main to Building the treatment was conducted facility was whenever conducted necessary. whenever necessary. Water Due to transfer other work, from water the Unit transfer Turbine to the Building buildings to (Units the High 4, Temperature Centralized Incinerator radioactive Building waste treatment and the Process facility) was Main conducted Building was whenever conducted necessary. whenever necessary. Water Operations transfer of the from Cesium the Unit dsorption Radioactive pparatus Waste have Treatment been suspended. Facility to the Process Main Building was conducted whenever necessary. Water Operations transfer of the from nd the Cesium Unit 3 Turbine dsorption Building pparatus to the have High Temperature been conducted; Incinerator the availability Building factor and the is 3% Process (previous Main simulated: Building was 5%). conducted whenever necessary. Water transfer capacity from of the treated Unit water Radioactive was changed Waste as Treatment operations Facility of new to tanks the Process started. Main Building was conducted whenever necessary. On November, water transfer from the Unit Turbine Building to the Unit Radioactive Waste Treatment Facility was conducted. From November, operations of the Cesium dsorption pparatus has been suspended. Operations of the nd Cesium dsorption pparatus have been conducted; the availability factor is 49% (previously simulated: 55%). Due to other work, water transfer to the buildings (Units 4, the Process Main Building, the High Temperature Incinerator Building) was conducted whenever necessary. * The figures of the data are treated as a reference, because water levels during water transfer are not stable. * The figures of the storage volume do not include those of the following volumes that have accumulated from the bottom of the tanks to the height of socalled "down scale (DS)," where water gauges show %: Freshwater receiving tank (approx. 9m 3 ), waste liquid storage tank (approx.m 3 ), Treated water storage tank (approx.,8m 3 ), storage tank (approx. 6m 3 ). *3 The figures of the data show the operational limits. *4 The figures of " capacity" do not include those of the volumes that have accumulated from the bottom of the tanks to the height of socalled "down scale (DS)," where water gauges show %. However, each tank has the capacity that accomodates more than the storage volume that accumulates up to the height of "DS." *5 The figure of "Residual water" includes the one of the volumes that have accumulated from the bottom of the tanks to the height of socalled "down scale (DS)," where water gauges show %. The amount of the residual water of concentrated saltwater is calculated based on that of the water treated through the LPS and other facilities. *6 The data shown here are those of Cs37. *7 Total treated amount of Cesium adsorption apparatus and nd Cesium adsorption apparatus and 3rd Cesium adsorption apparatus. Breakdown of the treated amount: Cesium adsorption apparatus (m 3 ) nd Cesium adsorption apparatus (,57m 3 ) 3rd Cesium adsorption apparatus (m 3 ) Breakdown of the cumulative treated amount: Cesium adsorption apparatus (39,87m 3 ) nd Cesium adsorption apparatus (,63,m 3 ) 3rd Cesium adsorption apparatus (,7 m 3 ) *8 The data of the water levels in the Reactor Buildings are the data as of 7 a.m., December 3. *9 Breakdown of the used vessels: Cesium adsorption apparatus ( 77), nd Cesium adsorption apparatus (8) Others: container (,964), Treated column (), Used vessel (), Filiters and so forth (65) * Volume of stored in the weldedtype tanks * Volume of remaining in the fringetype tanks

4 and treatment of high level radioactive accumulated water (as of December, 8) ttachment last Volume of water to be injected to Reactor (3) report Filtrate water Treated water (freshwater),5m m 3 Cumulative treated water 99,9m 3 Reactor building Classification High level radioactive waterwaste, waste liquid water Treated water (saltwater) volume * saltwater Treated water (concentrated saltwater) Removal of piping Residual water *4 capacity *,3 receiving tank* m 3 Multinuclide Removal Treated water Freshwater receiving tank 5,3m 3 97m 3,6m 3 Treated water Equipment ( saltwater) waste Treated water (freshwater) Removal of piping To liquid storage tank 9,3m 3 No Change,7m 3 Treated water from Multinuclide Removal Equipment Treated water storage tank*4 989,54m 3 +,6m 3,,3m 3 Freshwater Unit : 7m 3 day,fdw CS Unit : 7m 3 day,fdw CS Unit 3: 7m 3 day,fdw CS Filtrate Tank Water injection tank (CST) (Buffer tank) waste liquid Evaporative concentration apparatus Reverse osmosis treated water (Freshwater) Reverse osmosis circulation facility inside buildings Desalination plant (Reverse osmosis) supply tank storage tank 7,55m 3 +,7m 3 saltwater receiving tank water tank pprox.5m 3 35,5m 3 capacity*,3 No Change pprox.,m 3 pprox.5,7m 3 No Change pprox. 49,5m 3 Turbine building (High temperature incinerator building) SPT(B) Reactor Pressure Vessel Primary Containment Vessel Condenser (Process main building) Treatment facility (Cesium adsorption apparatus) (nd Cesium adsorption apparatus) (Decontamination facility) Waste From Facility Water level in Treated volume Cumulative Facility Water level Waste produced volume TB volume (3) treated volume capacity Unit pprox.,45m 3 + 5m 3 T.P. 3 Process Main Building pprox. 9,6m 3,78m 3 T.P. 973 pprox. pprox. Sludge 597m 3 No Change 7m 3 * (Unit TB) 5,4m 3,3,3m 3 Unit pprox. 8,3m 3 m 3 High Temperature Incinerator Building pprox. 3,38m m 3 T.P. 547 *5 *5 Used vessels 4,37 *6 +6 6,37 Unit 3 pprox. 8,48m 3 + 6m 3 T.P. 7 Total pprox.,99m 3 (Unit 3 TB) Unit 4 pprox. 8,83m 3 5m 3 Total pprox. 7,79m 3 [Main operations that are planned to be conducted during the period from December 3, 8 to December, 8.] Water transfer from the Units 4 to the buildings (Units 4, ) and to the will be conducted whenever necessary. Due to other work, water transfer to the buildings (Units 4, ) will be conducted whenever necessary. Operations of the Cesium dsorption pparatus will continue to be suspended. Operations of the nd Cesium dsorption pparatus will continue to be conducted (assumed availability factor: 6%). capacity of treated water will be changed as operations of new tanks started. * The figures of " volume" do not include those of the volumes that have accumulated from the bottom of the tanks to the height of socalled "down scale (DS)," where water gauges show %. * The figures of the data show the operational limits. *3 The figures of " capacity" do not include those of the volumes that have accumulated from the bottom of the tanks t o the height of socalled "down scale (DS)," where water gauges show %. However, each tank has the capacity that accomodates more than the storage volume that accumulates up to the height of "DS." *4 The figure of "Residual water" includes the one of the volumes that have accumulated from the bottom of the tanks to the height of socalled "down scale (DS)," where water gauges show %. The amount of the residual water of concentrated sal twater is calculated based on that of the water treated through the LPS and other facilities. *5 Total treated amount of Cesium adsorption apparatus and nd Cesium adsorption apparatus and 3rd Cesium adsorprion apparatus Breakdown of the treated amount: Cesium adsorption apparatus ( m 3 ) nd Cesium adsorption apparatus (5,4m 3 ) 3rd Cesium adsorption apparatus (m 3 ) Breakdown of the cumulative treated amount: Cesium adsorption apparatus ( 39,87m 3 ) nd Cesium adsorption apparatus (,636,6m 3 ) 3rd Cesium adsorption apparatus (,7m 3 ) *6 Breakdown of the used vessels: Cesium adsorption apparatus (77) nd Cesium adsorption apparatus (8) Others: container (,97), Treated column (), Used vessels (), Filters and so forth (65) *7 Volume of stored in the weldedtype tanks *8 Volume of remaining in the frangetype tanks

5 T.P Simulation Results of ccumulated Water Treatment in Units 4 Turbine 3 T.P. 6 (Water level inside Unit Turbine Building) ccumulated Water Level in Unit Turbine Building [mm] ccumulated Water Level in Unit Turbine Building Taking into ccount the Rainfall (Reference) ccount Water Level in Unit Turbine Building ttachment T.P T.P. 3 (Water level inside Unit 3 Turbine Building) ccumulated Water Level in Unit 3 Turbine Building [mm] ccumulated Water Level in Unit 3 Turbine Building Taking into ccount the Rainfall (Reference) ccumulated Water Level in Unit 3 Turbine Building T.P T.P. 35 (Water level inside Unit 4 Turbine Building) ccumulated Water Level in Unit 4 Turbine Building [mm] ccumulated Water Level in Unit 4 Turbine Building Taking into ccount the Rainfall (Reference) ccumulated Water Level in Unit 4 Turbine Building [m 3 ] 8 4 Capacity of the Centralized Radioactive Waste Treatment Facility Centralized Radioactive Waste Total mount Process Main Building mount High Temperature Incinerator Building mount [m 3 ] 3 Capacity and Volume of the Saltwater Tank Tank Capacity Waste Fluid mount Treated Water ( Saltwater) Receiving Tank mount The residual water of concentrated saltwater which is left at the bottoms of the storage tanks has been being treated. 3 The operations of the Evaporation Concentration pparatus have been suspended. 3 Multinuclide Removal Equipment has been in operation (under hot test). 3 Extension Multinuclide Removal Equipment has been in operation. 3 The operations of the other teatment facilities have been suspended Note The amount of water treated through the nd Cesium dsorption pparatus is estimated to be 78m 3 d (Subject to change depending on the factors such as the levels of water accumulated in TBs.) "ccumulated Water Levels in Unit, 3 and 4 TBs" are simulated water levels in consideration of the change of the water levels caused by recent rainfall, inflow of groundwater, etc. in the surrounding areas of the Fukushima Daiichi Nuclear Power Station. "ccumulated Water Levels in Unit, 3 and 4 TBs Taking into ccount the Rainfall" are simulated water levels which are calculated by adding to the accumulated water amounts which are assumed to increase at the ra of 8mm a day when the surrounding areas of the Fukushima Daiichi Nuclear Power Station have the rainfall equal to the average amount of rain which fell for three months from ugust to October in 5 to 7. Unit Turbine Building water level is controled by retained water transfer pumps in the Unit reactor building. Unit 3 Turbine Building water level is controled by retained water transfer pumps in the Unit 3 turbine building. Unit 4 Turbine Building water level is controled by retained water transfer pumps in the Unit 4 turbine building. place of water transported from the Units 4 will be changed over from the high temperature incinerator building to the process main building