Compilation of Disclosed Past Data

Key Content

Results of Monitoring at the Time Reactor Building was Opened

• Unit 1 (May 8 – May 9, 2011) and Unit 2 (June 19 – June 20, 2011)
• Results of monitoring related to nitrogen injection to the Unit 3 PCV (July 14 – July 28, 2011)

Results of Water Level Measurement at Sub-drain Pits

• Results of water level measurements at sub-drain pits (around Unit 1 through Unit 6, around central radioactive waste treatment facility, sub-drain layout)

Compilation of Plant Data Related to the Fukushima Daiichi Nuclear Power Station at the Time the Earthquake Struck

• Compilation of plant data related to the Fukushima Daiichi Nuclear Power Station at the time the Tohoku Earthquake and Tsunami struck