Summary
Highlights
On March 11, a powerful earthquake, the strongest in Japan's recorded history, struck the Fukushima Dai-ichi nuclear power plant. Despite the plant's design to withstand earthquakes, the subsequent tsunami, which was more than twice the height of the plant's seawall, overwhelmed its defenses. This led to the destruction of backup diesel generators crucial for powering the cooling systems, leaving workers unable to prevent the nuclear fuel from melting.
With cooling systems offline, pressure inside the reactor cores began to rise due to the buildup of radioactive steam and hydrogen. Engineers realized they needed to vent radioactive gases to avoid an explosion, a decision that required the Prime Minister's authorization. The Prime Minister, suspicious of TEPCO's communication, personally visited the plant to ensure the venting operation proceeded, even if it meant risking the lives of the workers involved.
After villagers were evacuated, the 'venting team' went into Reactor One, a dangerous environment with extremely high temperatures and radiation, to manually open the valves. Their efforts seemed successful, reducing pressure in the reactor. However, shortly after, a hydrogen explosion ripped through the roof of the reactor building, causing initial panic among workers who feared a core explosion. It was later determined the core remained intact, but the explosion halted further cooling efforts.
The explosion released a plume of radiation, prompting a wider evacuation zone. Reactor three also began to melt down, leading TEPCO to request assistance. A specialist team of soldiers attempted to inject water but were forced to retreat after another hydrogen explosion. Radiation levels became lethally high in parts of the plant, causing the plant manager, Masao Yoshida, to order a full evacuation of all but a skeleton crew, later known as the 'Fukushima Fifty'.
With concerns growing about spent fuel pools boiling dry, the Japanese government ordered desperate measures. Helicopters attempted to drop water from the air, a dangerous mission for the pilots due to high radiation levels. The efforts were largely ineffective. Subsequently, a team of Tokyo firefighters, primarily men over 40 to minimize risk to future generations, were ordered to lay hoses and pump water into the fuel pools on the ground. Despite extreme danger and obstacles, they successfully completed their mission.
The firefighters' actions helped reduce radiation levels, allowing hundreds of other workers to enter the plant and lay miles of pipes to establish a continuous flow of water for cooling the reactor cores. This critical effort brought the most dangerous phase of the crisis to an end. In the aftermath, the Prime Minister resigned, TEPCO faced immense financial penalties, and over 100 workers incurred increased cancer risks. Norio Kimura, a farmer from Fukushima, moved his surviving daughter away from the contamination zone, while still grieving for his missing family members and hoping for a return to their home.