FrontMatter -- Acknowledgments -- Reviewer Acknowledgments -- Contents -- Synopsis -- Summary -- 1 Introduction -- 2 Background on Japanese and U.S. Nuclear Plants -- 3 Great East Japan Earthquake and Tsunami and Impacts on Japanese Nuclear Plants -- 4 Fukushima Daiichi Nuclear Accident -- 5 Lessons Learned: Plant Operations and Safety Regulations -- 6 Lessons Learned: Offsite Emergency Management -- 7 Lessons Learned: Nuclear Safety Culture -- References -- Appendix A: Biographical Sketches of Committee, Technical Advisor, and Staff -- Appendix B: Presentations, Breakout Sessions, and Visits -- Appendix C: Detailed Accident Time Line -- Appendix D: Operation and Support Organizations -- Appendix E: Recommendations from Other Organizations -- Appendix F: Regulator and Industry Actions in the United States -- Appendix G: Hydrogen Control in Severe Accidents -- Appendix H: Nuclear Plant Emergency Procedures and Guidelines -- Appendix I: Probabilistic Risk Assessment -- Appendix J: Human Reliability Analysis -- Appendix K: Tsunami Hazards in the Atlantic Ocean Basin -- Appendix L: Factoring the Costs of Severe Nuclear Accidents into Backfit Decisions -- Appendix M: Access to Timely and Reliable Information to Support Decision Making During a Nuclear Power Plant Accident -- Appendix N: Conversions and Units -- Appendix O: Acronyms.