Investor Presentaiton

Discharge related facilities for securing safety by TEPCO Secondary treatment facility (newly installed reverse osmosis membrane facility) Secondary treatment of treated water to be re- purified (sum of the ratios of nuclides, excluding tritium, is between 1 and 10) Secondary treatment facility (ALPS) Secondary treatment of Treated water to be re- purified (sum of the ratios of nuclides, excluding tritium, is 1 or higher) ALPS treated water, etc. tanks EL 33.5m Measurement/confirmation facility (K4 tank group) Comprised of three sets of tank groups each with the role of receiving, measurement/confirmation, and discharge. In the measurement/confirmation stage, water that has been made homogenized through circulation and agitating is sampled and analyzed (approx. 10,000m³ x 3 groups) Rotation Transfer facility Seawall Source: Developed by Tokyo Electric Power Company Holdings, Inc. based on the map developed by the Geospatial Information Authority of Japan (electronic territory web) https://maps.gsi.go.jp/#13/37.422730/141.044970/&base=std&ls=std&disp=1&vs =c1j0h0k0l0u0t0z0r0s0m0f1 Undersea tunnel East- West .5km Discharge Receiving Measurement/ confirmation ALPS treated water transfer pump Installed around emergency isolation valves and transfer pipes Futaba Town Seawall -LINK Flow meter/water flow rate control valve/ Emergency isolation valve (tsunami prevention measure) Header pipe (diameter approx. 2m by length approx. 7m) Seawater flow meter Emergency isolation valve North- South 3.5km Area* where fishing is not routinely conducted Okuma Town 1 km *Area where common fishery rights are not set EL 11.5m EL 2.5m Dilution facility Seawater pipe Seawater transfer pump (3 units) Road Discharge vertical shaft (Down-stream storage) Discharge to sea Unit 5 intake Seawater used for dilution (intake from outside the harbor) Discharge vertical shaft (upper-stream storage) Discharge facility Discharge tunnel (approx. 1km) Use the differential head equivalent to the loss in the discharge tunnel (difference between the water surface in the down- stream storage and the sea surface) to discharge water naturally. 17

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