Tokaimura

By jazminmenjivar

  • JCO (Japan Nuclear Fuel Conversion Company)

    JCO (Japan Nuclear Fuel Conversion Company)
    Nuclear Industrial Accident
    Fuel Reprocessing Plant
    Modified Unregulated Process
    Created Fuel rods for other power plants

  • 10:30 am

    10:30 am
    Around 26 liters of solution had been poured into precipitation tank in 4 batches
    Day after 10:30am another batch been prepared and poured into tank (40 liters) 16kg of Uranium (Hisashi Ouchi)
    (Tank has a mx. limit of 2.4 kg of Uranium) Created a nuclear fission chain reaction
    Began to emit intense Gamma and neutron radiation triggering number of alarms Fission products release into building

  • 11:40 am

    11:40 am
    A maximum of radiation was 0.85 msv/hr (millisieverts an hour) in an area round the facility
    161 people evacuated
    39 houses
    in a 350 meter radius
    20hrs to control after the accident

  • 5 pm

    5 pm
    Maximum Neutron rates at the site boundaries were measured to be 4 msv/hr
    Due to wet process in the solution, the water in the solution acted as a moderator prolong the reaction

  • Nuclear Plant Engineers/Techs

    Nuclear Plant Engineers/Techs
    -Ouchi exposed to 17 Sv (17,000 msv) radiation (300x of annual dose for nuclear engineer and 3x lethal dose)
    -Masato Shinohara exposed to 10Sv/ 10k msv
    -Yutaka Yokokawa (4meters away) 3Sv/3k msv 5 below the lethal dose Annual limit dose 20 msv per year
    Lethal dose 5k msv

  • Ouchi

    Ouchi
    Radiation completely destroys his chromosomes, WBC, covered his body in 3rd degree burns
    He immediately becomes disorientated, trouble breathing, vomits Only human to live with no DNA in his body

  • 83 days after Ouchi died

    had peripheral blood stem transplant from his sister
    skin grafts
    in november of 1999 he was bleeding from his eyes and intestine

  • 211th day Shinohara died

    Also receive blood transplant for bone marrow and skin grath
    later on to have lung and kidney failure
    contracted Pneumonia as result of MRSA infection

  • October 11, 2000

    October 11, 2000
    6 men from JCO including Yutaka Yokokawa were charge with Professional Negligence 5 years.
    Fines
    Exposed to around 400 people

  • 2005 Nuclear Plant destroyed

    2005 Nuclear Plant destroyed
    -2003 the Uranium conversion stopped completely
    -A replica now sits in the Atomic Energy Science Museum in Tokaimura. You can visit the museum if you are ever out there in Japan