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Table of Contents
Preface; Contents; Chapter 1: Introduction; 1.1 Background to the Establishment of the AESJ Investigation Committee; 1.2 Activities of the AESJ Investigation Committee; 1.3 Structure of the Report; Chapter 2: Overview of Nuclear Power Station; 2.1 Overview of Facilities in the Fukushima Daiichi Nuclear Power Station; 2.1.1 Main Facilities Including Safety Equipment; 2.1.1.1 Overview of the Power Station; 2.1.1.2 Safety Equipment and Others at Power Stations; 2.1.1.3 Emergency Power Supply Facilities; 2.1.1.4 The Cooling System in the Event of a Reactor Isolation
2.1.1.5 Equipment, etc. to be Discussed in the Next and Subsequent Chapters2.1.2 Facilities for Accident Management Measures; 2.1.2.1 Severe Accident; 2.1.2.2 Introduction of Severe Accident Measures to Japan; 2.1.2.3 Severe Accident Measures in Fukushima Daiichi; 2.1.3 Seismic Resistant Design and Tsunami Resistant Design for Facilities; 2.1.3.1 The Regulatory Guide for Reviewing the Safety Design of Light Water Nuclear Power Reactor Facilities; 2.1.3.2 Seismic Resistant Design; 2.1.3.3 Tsunami Resistant Design
2.2 Overview of Facilities in the Power Stations Other Than the Fukushima Daiichi Nuclear Power Station2.2.1 The Fukushima Daini Nuclear Power Station; 2.2.2 The Onagawa Nuclear Power Station; 2.2.3 The Tokai Daini Nuclear Power Station; Chapter 3: Overview of the Accident at the Fukushima Daiichi Nuclear Power Station; 3.1 Damage Caused by the Earthquake and Tsunami; 3.2 Unit 1; 3.3 Unit 2; 3.4 Unit 3; 3.5 Unit 4 and Spent Fuel Pools; 3.6 Unit 5 and Unit 6; Chapter 4: Overview of Events Occurring at Power Stations Other Than the Fukushima Daiichi Nuclear Power Station
4.1 The Fukushima Daini Nuclear Power Station4.1.1 Overview of the Fukushima Daini Nuclear Power Station; 4.1.2 Overview of the Earthquake and Tsunami; 4.1.3 Influence of the Seismic Ground Motion and the Tsunami; 4.1.3.1 Influence of the Seismic Ground Motion on the Power Station; 4.1.3.2 Influence of the Tsunami on the Power Station; 4.1.4 Response Before the Arrival of the Tsunami; 4.1.5 Response After the Arrival of the Tsunami; 4.1.5.1 Reactor Cooling Responses After the Arrival of the Tsunami; 4.1.5.2 Cooling of the Containment Vessel Pending Restoration of the Heat Removal Function
4.1.5.3 Restoration Plan Based on the Walkdown4.1.5.4 Emergency Material Procurement; 4.1.5.5 Restoration of the Heat Removal Function and Achievement of Cold Shutdown; 4.2 The Onagawa Nuclear Power Station; 4.2.1 Overview of the Onagawa Nuclear Power Station; 4.2.2 Overview of the Earthquake and Tsunami; 4.2.2.1 Observed Earthquake and Tsunami; 4.2.2.2 Earthquake Observation Record; 4.2.2.3 Tsunami Observation Record; 4.2.3 Influence of the Seismic Ground Motion and Tsunami; 4.2.3.1 Collapse of the Unit 1 Heavy Oil Storage Tank; 4.2.3.2 Fire on the Unit 1 High-Voltage Power Panel (M/C)
2.1.1.5 Equipment, etc. to be Discussed in the Next and Subsequent Chapters2.1.2 Facilities for Accident Management Measures; 2.1.2.1 Severe Accident; 2.1.2.2 Introduction of Severe Accident Measures to Japan; 2.1.2.3 Severe Accident Measures in Fukushima Daiichi; 2.1.3 Seismic Resistant Design and Tsunami Resistant Design for Facilities; 2.1.3.1 The Regulatory Guide for Reviewing the Safety Design of Light Water Nuclear Power Reactor Facilities; 2.1.3.2 Seismic Resistant Design; 2.1.3.3 Tsunami Resistant Design
2.2 Overview of Facilities in the Power Stations Other Than the Fukushima Daiichi Nuclear Power Station2.2.1 The Fukushima Daini Nuclear Power Station; 2.2.2 The Onagawa Nuclear Power Station; 2.2.3 The Tokai Daini Nuclear Power Station; Chapter 3: Overview of the Accident at the Fukushima Daiichi Nuclear Power Station; 3.1 Damage Caused by the Earthquake and Tsunami; 3.2 Unit 1; 3.3 Unit 2; 3.4 Unit 3; 3.5 Unit 4 and Spent Fuel Pools; 3.6 Unit 5 and Unit 6; Chapter 4: Overview of Events Occurring at Power Stations Other Than the Fukushima Daiichi Nuclear Power Station
4.1 The Fukushima Daini Nuclear Power Station4.1.1 Overview of the Fukushima Daini Nuclear Power Station; 4.1.2 Overview of the Earthquake and Tsunami; 4.1.3 Influence of the Seismic Ground Motion and the Tsunami; 4.1.3.1 Influence of the Seismic Ground Motion on the Power Station; 4.1.3.2 Influence of the Tsunami on the Power Station; 4.1.4 Response Before the Arrival of the Tsunami; 4.1.5 Response After the Arrival of the Tsunami; 4.1.5.1 Reactor Cooling Responses After the Arrival of the Tsunami; 4.1.5.2 Cooling of the Containment Vessel Pending Restoration of the Heat Removal Function
4.1.5.3 Restoration Plan Based on the Walkdown4.1.5.4 Emergency Material Procurement; 4.1.5.5 Restoration of the Heat Removal Function and Achievement of Cold Shutdown; 4.2 The Onagawa Nuclear Power Station; 4.2.1 Overview of the Onagawa Nuclear Power Station; 4.2.2 Overview of the Earthquake and Tsunami; 4.2.2.1 Observed Earthquake and Tsunami; 4.2.2.2 Earthquake Observation Record; 4.2.2.3 Tsunami Observation Record; 4.2.3 Influence of the Seismic Ground Motion and Tsunami; 4.2.3.1 Collapse of the Unit 1 Heavy Oil Storage Tank; 4.2.3.2 Fire on the Unit 1 High-Voltage Power Panel (M/C)