Government and IAEA monitoring of air and seawater is ongoing. At the IAEA General Conference in 2012 the Director General promised a comprehensive report which would be "an authoritative, factual and balanced assessment, addressing the causes and consequences of the accident as well as the lessons learned." Il a engendré un tsunami d'une amplitude exceptionnelle.

By the end of March all storages around the four units – basically the main condenser units and condensate tanks – were largely full of contaminated water pumped from the buildings. The majority of the power plant area was at less than 0.01 mSv/h. Discussion was ongoing, but action minimal. For many of these both external dose and internal doses (measured with whole-body counters) were considered.

Tepco accepted the conditions imposed on the company as part of the package. At the same time all six external power supply sources were lost due to earthquake damage, so the emergency diesel generators located in the basements of the turbine buildings started up. "The Executive Summary includes recommendations, but the following paragraphs indicate some salient points from the actual investigation.Before the accident, there was a basic assumption in Japan that the design of nuclear power plants and the safety measures that had been put in place were sufficiently robust to withstand external events of low probability and high consequences.

Hydrogen was released from the reactor pressure vessels, leading to explosions inside the reactor buildings in units 1, 3 and 4 that damaged structures and equipment and injured personnel.

Other Japanese nuclear operators will pay ¥4,000 billion through the Nuclear Damage Compensation and Decommissioning Facilitation Corp (NDF), and the Japanese government will pay ¥2,000 billion for cleanup in Fukushima prefecture.A 12-member international expert team assembled by the IAEA at the request of the Japanese government has reported on remediation strategies for contaminated land. Jugeant pour la première fois des personnes physiques dans le cadre de la catastrophe de la centrale nucléaire de Fukushima-Daiichi en mars 2011, le tribunal de Tōkyō acquitte trois anciens dirigeants de la Tōkyō Electric Power Company (Tepco), l’ex-président du conseil d’administration Tsunehisa [...] Lors de la consultation d'un article, vous pouvez également double-cliquer sur un mot afin d'afficher sa définition.

Most Japanese people were exposed to additional radiation amounting to less than the typical natural background level of 2.1 mSv per year.People living in Fukushima prefecture are expected to be exposed to around 10 mSv over their entire lifetimes, while for those living further away the dose would be 0.2 mSv per year. The Great East Japan Earthquake of magnitude 9.0 at 2.46 pm on Friday 11 March 2011 did considerable damage in the region, and the large tsunami it created caused very much more.

Tepco estimated its extra costs for fossil fuels in 2011-12 (April-March) would be about JPY 830 billion ($10.7 billion).On 14 June 2011, Japan's cabinet passed the Nuclear Disaster Compensation Bill, and a related budget to fund post-tsunami reconstruction was also passed subsequently.In September 2011 the Nuclear Damage Compensation Facilitation Corporation started by working with Tepco to compile a business plan for the next decade. Containment venting for unit 2 was not successful, and the containment failed, resulting in radioactive releases.People within a radius of 20 km of the site and in other designated areas were evacuated, and those within a radius of 20-30 km were instructed to shelter before later being advised to voluntarily evacuate. The plan also involved Tepco reducing its own costs by JPY 2545 billion ($32.6 billion) over the next ten years, including shedding 7400 jobs. A hardened emergency response centre on site was unable to be used in grappling with the situation, due to radioactive contamination.Three Tepco employees at the Daiichi and Daini plants were killed directly by the earthquake and tsunami, but there have been no fatalities from the nuclear accident.Among hundreds of aftershocks, an earthquake with magnitude 7.1, closer to Fukushima than the 11 March one, was experienced on 7 April, but without further damage to the plant.

As noted above, units 5&6 were decommissioned in 2014 and will be used for training.Earlier, consortia led by both Hitachi-GE and Toshiba submitted proposals to Tepco for decommissioning units 1-4.

In early June NISA increased its estimate of releases to 770 PBq, from about half that, though in August the NSC lowered this estimate to 570 PBqFor Fukushima Daini, NISA declared INES Level 3 for units 1, 2, 4 – each a serious incident.Beyond whatever insurance Tepco might carry for its reactors is the question of third party liability for the accident. ALPS-treated water is currently stored in tanks onsite which will reach full capacity by the summer of 2022. Finally unit 2 will have its 587 used assemblies and 28 fresh ones moved. This assumption was accepted by nuclear power plant operators and was not challenged by regulators or by the government.