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Tōkai (Japan) On September 30, 1999, a criticality accident occured at the Tokai nuclear fuel plant, Tokai-mura, Ibaraki Prefecture, Japan. The plant converts enriched uranium hexafluoride (UF6) to uranium dioxide (UO2) for use in nuclear fuel. Criticality accidents involve a self-sustaining chain reaction caused from handling of too large amounts of enriched uranium. The chain reaction continued for around 20 hours, before it could be stopped. Impacts: The chain reaction caused heavy releases of gamma and neutron radiation. Three workers were exposed to doses of up to 17 Sv (Sieverts), causing severe radiation sickness. The worker exposed to the highest dose and died on December 21, 1999. The worker exposed to the second highest dose of 6 - 10 Sv died on April 27, 2000. 68 other persons were irradiated at lower levels. In the year 2000, PHI Essences visited the area near Tokay for research Application with T1 ® -Anti-Radiation-Essence (Power Plant in the background)
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