french-nuclear-safety.fr/dosimetric-references PHYSICAL CHARACTERISTICS Calcium-45 ( 45Ca ) ▖Radioactive half-life: 163 d ▖Main types of radiation emitted: b- Calcium-47 ( 47Ca ) ▖Radioactive half-life: 4.5 d ▖Main types of radiation emitted: b- and g in equilibrium with the Scandium-47 (half-life 3.4 d) 47 Ca Calcium 45 Ca Calcium INTERNAL CONTAMINATION MEASUREMENT J Urine bioassay J Faeces bioassay J In vivo measurement (47Ca only) Calcium SOURCES OF EXPOSURE ▖45Ca: research laboratories EMERGENCY TREATMENT Two treatments are possible. Calcium salts PRESENTATION CALCIFORTE® 500 mg, oral solution. Vial sweetened with sodium cyclamate and sodium saccharine (GRIMBERG SA LABORATORIES). One 10 ml vial contains 500 mg elemental calcium. INDICATIONS Internal contamination by ingestion. DOSAGE Adults and children (> 10 years): 6 vials every 6 h by oral route. Children (6 to 10 years): 3 vials every 6 h by oral route. Sodium alginate PRESENTATION GAVISCON®, oral suspension in 500 mg sachet of Sodium alginate. DOSAGE Adults: 10 g/d. EXPOSURE RISK ▖Irradiation + 47Ca ▖External contamination ++ 45Ca and 47Ca ▖Internal contamination + 47Ca 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 11
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