french-nuclear-safety.fr/dosimetric-references PHYSICAL CHARACTERISTICS Caesium-134 ( 134Cs ) ▖Radioactive half-life: 2 years ▖Main types of radiation emitted: b- and g Caesium-137 ( 137Cs ) ▖Radioactive half-life: 30.1 years ▖Main types of radiation emitted: b- and g in equilibrium with the Barium-137m SOURCES OF EXPOSURE ▖Nuclear reactors (137Cs fission products – 134Cs activation products) ▖Industrial and medical sources (g) 137 Cs Caesium 134 Cs Caesium INTERNAL CONTAMINATION MEASUREMENT J Urine bioassay J Faeces bioassay J In vivo measurement Caesium EMERGENCY TREATMENT Prussian Blue (Iron ferrocyanide) PRESENTATION RADIOGARDASE® 500 mg capsules (SERB). DOSAGE Persons > 12 years: 1 g, 3 times a day, i.e. 3 g/d. Children (2 to 12 years): 0.5 g, 3 times a day, i.e. 1.5 g/d. Children (< 2 years): no data being available, the administration of Prussian Blue must be evaluated with respect to the risks involved. The capsules must be swallowed with a drink or with foodstuffs; food intake speeds up biliary secretion and the enterohepatic cycle. With patients who have difficulty swallowing, the capsules can be opened and their content mixed with the food or a liquid (e.g. a mannitol solution). IRSN-INRS radionuclide sheet: Radiation protection: radionuclides. Caesium-137 ( irsn.fr). to find more EXPOSURE RISK ▖Irradiation +++ ▖External contamination +++ ▖Internal contamination ++ 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 10
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