title: Dissolution behaviour of 238U, 234U and 230Th deposited on filters from personal dosemeters.
abstract: Kinetics of dissolution of (238)U, (234)U and (230)Th dust deposited on filters from personal alpha dosemeters was studied by means of a 26-d in vitro dissolution test with a serum ultrafiltrate simulant. Dosemeters had been used by miners at the uranium mine 'Dolní Rozínka' at Rozná, Czech Republic. The sampling flow-rate as declared by the producer is 4 l h(-1) and the sampling period is typically 1 month. Studied filters contained 125 +/- 6 mBq (238)U in equilibrium with (234)U and (230)Th; no (232)Th series nuclides were found. Half-time of rapid dissolution of 1.4 d for (238)U and (234)U and slow dissolution half-times of 173 and 116 d were found for (238)U and (234)U, respectively. No detectable dissolution of (230)Th was found.
authors.affiliation: National Radiation Protection Institute, Bartoskova 28, Prague 4, Czech Republic. vera.beckova@suro.cz
authors.forename: Vera
authors.initials: V
authors.lastname: Becková
authors.forename: Irena
authors.initials: I
authors.lastname: Malátová
mesh_terms: D005374:Filtration; D006801:Humans; D008906:Mining; D011834:Radiation Monitoring / Q000295:instrumentation*; D011835:Radiation Protection / Q000295:instrumentation* / Q000592:standards; D011848:Radioactive Pollutants / Q000032:analysis*; D013910:Thorium / Q000032:analysis*; D014501:Uranium / Q000032:analysis*
chemical_list: D011848:Radioactive Pollutants; D014501:Uranium; D013910:Thorium