and Industrial Safety Agency, or NISA, was at Fukushima I at the time of the earthquake and tsunami and provided details of the early progression of the crisis. The Fukushima disaster displaced 50,000 households in the evacuation zone because of radioactivity releases into the air, soil and sea. In 2012 it was reported that 8.5 tonnes of radioactive water had leaked from Fukushima Daiichi No.4. In June 2012 TEPCO revealed, that in 2006 and 2008 TEPCO-employees made two studies in which the effect of tsunami-waves higher than the "official" expected height of 5.7 meters was studied on the performance of the reactors. This was done after the large Indian Ocean tsunami in 2004. The conclusion from the simulation in 2006 was, that a 13.5 meter wave would cause a complete loss of all power and would make it impossible to inject water into reactor No.5. The costs to protect the plant for such an event was estimated to be about 25 million dollars. In 2008 the effect of a 10 meter high tsunami was calculated. TEPCO failed in both cases to take advantage of this knowledge, and nothing was done to prevent such an event to happen, because the study sessions were conducted only as a training for junior employees, and the company did not really expect such large tsunamis. TEPCO subsequently signed a partnership with French company Areva to treat the contaminated water. In 2016 three former TEPCO executives, chairman Tsunehisa Katsumata and two vice presidents, were indicted for negligence resulting in death and injury. All were acquitted by the Tokyo District Court on Sept. 19, 2019. Company future On 30 March 2011, the president of TEPCO, Masataka Shimizu, was hospitalized with symptoms of dizziness and high blood pressure in the wake of an increasingly serious outlook for the Fukushima plant and increasing levels of radiation from the stricken plant, as well as media reports of TEPCO's imminent nationalization or bankruptcy triggered by the situation at the Fukushima plant. On July 31, 2012, TEPCO was substantially nationalized by receiving a capital injection of 1 trillion yen (US$12.5bn) from the Nuclear Damage Liability Facilitation Fund (currently Nuclear Damage Compensation and Decommissioning Facilitation Corporation), a government-backed support body. The Fund holds the majority (50.11%) of voting rights with an option to raise that figure to 88.69% by converting preferred stocks into common stocks. This Japan's biggest utility had received by the