June 30, 2016Tokyo Electric Power Company Holdings, lnc.

Air Dose Rates inside the Buildings

Sampling Period

Unit 1: from April 1, 2016 to April 30, 2016

FlammabilityControl System (B)

Fukushima Daiichi NPS Unit 1 Reactor Building 1st Floor [mSv/h]

PrimaryContainment Vessel

Fukushima Daiichi NPS Unit 1 Reactor Building 2nd Floor [mSv/h]

PrimaryContainment Vessel

Heat Exchanger

Heat Exchanger

Primary Loop Recirculation System - Motor-Generation Set

40mSv/h

Fukushima Daiichi NPS Unit 1 Reactor Building 3rd Floor [mSv/h]

Primary Containment Vessel

Spent FuelPool

Primary Loop Recirculation System -Motor-Generation Set

Fukushima Daiichi NPS Unit 1 Reactor Building 4th Floor [mSv/h]

PrimaryContainment Vessel

Spent Fuel Pool

DryerSeparator

Pool

FlammabilityControl System (A)

Fukushima Daiichi NPS Unit 1 Reactor Building 5th Floor [mSv/h]

Spent Fuel Pool

DryerSeparator

Pool

Fukushima Daiichi NPS Unit 1 Turbine Building 1st Basement Floor [mSv/h]

Diesel Generator

Condenser Motor-DrivenReactor FeedWater Pump

Condensate Pump

Fukushima Daiichi NPS Unit 1 Turbine Building 1st Floor [mSv/h]

Condenser

Fukushima Daiichi NPS Unit 1 Turbine Building 2nd Floor [mSv/h]

MainGenerator

Low Pressure Steam Turbine High Pressure

Steam Turbine

Fukushima Daiichi NPS Unit 1 Radioactive Waste Treatment Facility 1st Floor [mSv/h]

Fukushima Daiichi NPS Unit 2 Radioactive Waste Treatment Facility 1st FloorUnits 1 and 2 Drum Loading Dock [mSv/h]

Fukushima Daiichi NPS Units 1 and 2 Service Building 1st Floor [mSv/h]

Fukushima Daiichi NPS Units 1 and 2 Service Building 2nd Floor [mSv/h]