PHYSICAL CHARACTERISTICS Uranium-235 ( 235U ) ▖Radioactive half-life: 7 x 108 years ▖Main types of radiation emitted: a and g ▖Decay products: Protactinium-231 (a) and Actinium-227 (bg) Uranium-238 ( 238U ) ▖Radioactive half-life: 4.5 x 109 years ▖Main types of radiation emitted: a ▖Decay products: Uranium-234 (a), Thorium-230 (a), Radium-226 (ag) and Lead-210 (a) 238 U Uranium 235 U Uranium INTERNAL CONTAMINATION MEASUREMENT J Urine bioassay J Faeces bioassay J Lung in vivo measurement Uranium EMERGENCY TREATMENT Sodium bicarbonate PRESENTATION LAVOISIER SODIUM BICARBONATE 1.4% isotonic solution for infusion (CHAIX ET DU MARAIS LABORATORY). DOSAGE Slow infusion, 1 bottle of 250 ml of isotonic solution (1-2 mmol/kg). Continue the treatment until an urine pH of 8-9 is obtained. CONTRAINDICATIONS ▖Metabolic alkalosis. ▖Respiratory acidosis. The infusion can aggravate or reveal an existing state of hypokalaemia. SOURCES OF EXPOSURE ▖Enriched uranium: nuclear reactors (fuel), nuclear weapons ▖Depleted uranium: ballast, biological protections, conventional weapons IRSN-INRS radionuclide sheet: Radiation protection: radionucleides. Natural uranium (irsn.fr). to find more EXPOSURE RISK ▖Irradiation 0 to ++ (enriched Uranium) ▖External contamination + (Decay product: 238U) ▖Internal contamination +++ (Chemical reaction) french-nuclear-safety.fr/dosimetric-references DOSE COEFFICIENT REFERENCE Effective committed dose per becquerel incorporated, taken from the Order mentioned in Article R. 1333-24 of the Public Health Code: RADIONUCLIDE HANDBOOK • Emergency treatment of internal contamination RH 54
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