The document summarizes the status and plans for removing water from the three damaged Fukushima nuclear power plant units. It describes the multi-step processes used to transfer water from suppression pools and tanks to the condensers and offshore to make room for continued water removal. The goal is to empty approximately 20,000 tons of contaminated water from the turbine buildings of each unit. It also mentions plans to inject a liquid glass material into boreholes and trenches to block groundwater inflow paths.

1. Status of Fukushima Units Miroslav Lipar 7April 2011

4. Sequence of Events to Remove Water in Unit 1 Suppression Pool Surge Tanks 2x3400 m3 Condensate Storage tank 1900 m3 Condenser 1600 m3 2nd Step Transfer to provide tank capacity Mar 31st to Apr 2nd – Unit 1 3rd Step Provide Space in Condenser Apr 2nd – Unit 1 1st Step Mar 24th – Mar 29th Condenser filled Water in Unit 1 Turbine Building Approx. 20,000 tons Planned Rad Waste Treatment facility Temp Storage Tank

5. Sequence of Events to Remove Water in Unit 2 Suppression Pool Surge Tanks 2x3400 m3 1st Step -Transfer to provide tank capacity Mar 29th to Apr 1st – Unit 2 Condensate Storage tank 2500 m3 Sea Apr 5th 1,500 tons Unit 5 & 6 sub drain pits 2nd Step - Transfer to provide capacity in condenser Apr 2nd – (30 m3/h) Low level contaminated water Apr 5th 10,000 tons Water in Unit 2 turbine building Approx. 20,000 tons Planned Condenser 3000 m3 Planned Rad Waste Treatment facility Temp Storage Tank

6. Sequence of Events to Remove Water in Unit 3 Suppression Pool Surge Tanks 2x3400 m3 Condensate Storage tank 2500 m3 1st Step -Transfer to provide tank capacity Mar 28th to Mar 31st - Unit 3 Sea Apr 5th 1,500 tons Unit 5 & 6 sub drain pits 2nd Step - Transfer to provide capacity in condenser Apr 5th – Unit 3 Low level contaminated water Apr 5th 10,000 tons Water in Unit 3 turbine building Approx. 20,000 tons water Later Condenser 3000 m3 Rad Waste Treatment facility Later Temp Storage Tank

8. Injection of Tracer

9. Injection of liquid glassCable Trench ⑨ 200 1900 O.P.+4.200 ③ O.P.+4.150 Pit O.P.+4.000 1800 O.P.+2.700 ④ ⑦ ⑧ O.P.+2.200 1m About ？ Screen Pump room ？ 300 300 ⑤ ⑤ ⑥ ① ① ② ？ Crack Pit ⑨ ② Injected liquid glass to block the water path in the gravel Screen Pump room ⑥ ⑧  Drill vertically Z ①～⑨:Positions of injection holes Cross Section Plan Floor Plan

10. Nitrogen injection