NAIIC(The National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission)
National Diet of Japan
国会事故調 | 東京電力福島原子力発電所事故調査委員会のホームページ
The official report of The Fukushima Nuclear Accident Independent Investigation Commission - Chapter 4 Overview of the damage and how it spread
The official report of The Fukushima Nuclear Accident Independent Investigation Commission - Executive summary