Thursday's report concluded:

• That since at least 2006, Japan's safety agency and plant operator Tokyo Electric Power Co. (TEPCO) knew the risk of a total power outage at Fukushima Daiichi in case of a major tsunami and postponed taking safety measures.

• That TEPCO too readily dismissed earthquake damage before the tsunami as a cause of Fukushima's fuel meltdowns.

• That collusion among the government, regulators and the utility itself had allowed lax preparation and precautions.

NEWS SERVICES