PHYSICAL CHARACTERISTICS Barium-140 ( 140Ba ) ▖Radioactive half-life: 12.8 d ▖Main types of radiation emitted: b- and g in equilibrium with the Lanthane-140 (period 1.7 d) SOURCES OF EXPOSURE ▖Nuclear reactors ▖140Ba: source of Lanthane-140 140 Ba Barium EXPOSURE RISK ▖Irradiation ++ 140Ba ▖External contamination ++ 140Ba ▖Internal contamination ++ 140Ba Barium EMERGENCY TREATMENT Two treatments are possible. Magnesium sulphate PRESENTATION LAVOISIER MAGNESIUM SULPHATE 15% (0.15 g/ml) solution for IV injection. 20 ml vial containing 3 g of Magnesium sulphate heptahydrate (CHAIX ET DU MARAIS LABORATORY). INDICATIONS Internal contamination by ingestion. DOSAGE Adults: 5 to 10 g by oral route (about 100 mg/kg), i.e. 2 to 3 vials of 20 ml. Sodium alginate PRESENTATION GAVISCON®, oral suspension in 500 mg sachet of Sodium alginate. DOSAGE Adults: 10 g/d. INTERNAL CONTAMINATION MEASUREMENT J Urine bioassay J Faeces bioassay J In vivo measurement DOSE COEFFICIENT REFERENCE Effective committed dose per becquerel incorporated, taken from the Order mentioned in Article R. 1333-24 of the Public Health Code: french-nuclear-safety.fr/dosimetric-references RADIONUCLIDE HANDBOOK • Emergency treatment of internal contamination RH 7
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