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Japanese worker Hisashi Ouchi died after surviving 83 days following a 1999 nuclear accident that exposed him to 17,000 millisieverts of radiation.
Hisashi Ouchi, a 35-year-old Japanese nuclear worker, survived the highest recorded human radiation exposure—17,000 millisieverts—during a 1999 criticality accident caused by excessive uranium processing.
He endured 83 days of severe suffering, including skin loss, organ failure, and repeated cardiac arrests, despite experimental treatments.
Conscious throughout much of his ordeal, he expressed agony, saying, “I am not a guinea pig.” He died on December 21, 1999, from multiple organ failure.
A colleague died months later.
The incident, blamed on poor safety practices and inadequate training, led to criminal charges and suspended sentences for six company officials.
El trabajador japonés Hisashi Ouchi murió después de sobrevivir 83 días tras un accidente nuclear de 1999 que lo expuso a 17.000 milisieverts de radiación.