title: Bioassay for neutron-dose estimations of three patients in the JCO criticality accident in Tokai-mura by measuring beta-ray emitters.
abstract: The measurement of beta-emitters in biological samples (hair, urine and bone) from three patients in the JCO criticality accident was performed to assess the neutron dose to individuals. The result of the measurements of 32P in hair and urine collected immediately after the accident showed that sufficient 32P activities had been induced in the hair by fast neutrons and in the urine by thermal neutrons to know the severity of the exposure to the individuals and to the position. From the measurement of 32P and 45Ca in bone from various anatomical parts of two patients who died 82 and 210 days after the accident, it was suggested that the distribution of the induced beta-emitters activities could prove the position and posture of the patients at the moment of exposure.
authors.affiliation: Environmental and Toxicological Sciences Research Group, National Institute of Radiological Sciences, Chiba, Japan. h_takeda@nirs.go.jp
authors.forename: H
authors.initials: H
authors.lastname: Takeda
authors.forename: K
authors.initials: K
authors.lastname: Miyamoto
authors.forename: M
authors.initials: M
authors.lastname: Yukawa
authors.forename: Y
authors.initials: Y
authors.lastname: Nishimura
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
authors.forename: H S
authors.initials: HS
authors.lastname: Kim
authors.forename: S
authors.initials: S
authors.lastname: Fuma
authors.forename: N
authors.initials: N
authors.lastname: Kuroda
authors.forename: F
authors.initials: F
authors.lastname: Kouno
authors.forename: H
authors.initials: H
authors.lastname: Joshima
authors.forename: T
authors.initials: T
authors.lastname: Hirama
authors.forename: M
authors.initials: M
authors.lastname: Akashi
mesh_terms: D001610:Beta Particles / Q000009:adverse effects; D001681:Biological Assay; D001842:Bone and Bones / Q000528:radiation effects; D002132:Calcium Radioisotopes / Q000032:analysis; D005214:Fast Neutrons / Q000009:adverse effects*; D006197:Hair / Q000528:radiation effects; D006801:Humans; D007564:Japan; D016273:Occupational Exposure; D010761:Phosphorus Radioisotopes / Q000032:analysis; D011829:Radiation Dosage; D018788:Radioactive Hazard Release
chemical_list: D002132:Calcium Radioisotopes; D010761:Phosphorus Radioisotopes