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- The men who caused the reaction — Hisashi Ouchi, Masato Shinohara, and Yutaka Yokokawa — were exposed to the highest amounts of radiation. Ouchi died 83 days later from multiple organ failure and cardiac arrest, and Shinohara followed in April 2000. Yokokawa survived, but he remained hospitalized for three months with minor radiation sickness.
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Masato Shinohara, 40, was transported to the same facility where he died on 27 April 2000 of multiple organ failure. He endured radical cancer treatment, numerous successful skin grafts, and a transfusion from congealed umbilical cord blood (to boost stem cell count).
May 7, 2021 · Masato Shinohara was exposed to a radiation dose of 6,000 - 10,000 millisieverts and died on April 27, 2000, after months of treatment. His colleague Yutaka Yokokawa, who had been exposed to a radiation level of between 1000 - 5000 millisieverts, managed to survive after some time in hospital.
Sep 30, 2024 · Just over a week after Ouchi’s death, Shinohara was able to breathe in some fresh air for the first time in months as he ventured into the garden at Tokyo University Hospital in his wheelchair. For a brief period, his condition was showing signs of recovery.
- Overview
- Irradiated Human
- Nuclear Power
- Accident
- Exposure & Treatment
This article is about the story of Hisashi Ouchi, who was exposed to the highest level of radiation in history and suffered from it for 83 days. He worked at a nuclear power plant in Tokaimura, Japan where he and two other workers were told to mix a new batch of fuel but due to their untrained process they mixed seven times more uranium into an imp...
Hisashi Ouchi was exposed to the highest level of radiation of any human in history and suffered from a lack of white blood cells, skin melting, and heart attacks. He died 83 days later.
Born in 1965, Hisashi Ouchi began working in the nuclear energy sector at an important time for his country as Japan had turned to nuclear power production due to few natural resources and costly dependence on imported energy. One-third of the city's population relied on the growing industry located northeast of Tokyo.
An explosion occurred at Tokaimura plant on March 11, 1997 before another accident happened two years later when three workers mixed seven times more uranium than needed into an improper tank causing a blue flash that confirmed a chain reaction releasing lethal emissions of radiation.
All three workers were taken to National Institute after exposure with different degrees where they received treatments including stem cell transplants but none worked except Yutaka Yokokawa who survived minor radiation sickness but faced criminal charges while Masato Shinohara died 7 months later and Hisashi Ouchi died 83 days after exposure due t...
According to doctors, two of the men were exposed to more than the 7 sieverts of radiation that is considered lethal: Hisashi Ouchi, aged 35, and Masato Shinohara, aged 29, received 17 sieverts and 10 sieverts respectively. Their supervisor, Yutaka Yokokawa, aged 54, was irradiated by 3 sieverts.
As this account published a few months later in The Washington Post details, Ouchi was standing at a tank, holding a funnel, while a co-worker named Masato Shinohara poured a mixture of intermediate-enriched uranium oxide into it from a bucket.
