Becková Vera, Malátová Irena
National Radiation Protection Institute, Bartoskova 28, Prague 4, Czech Republic.
Radiat Prot Dosimetry. 2008;129(4):469-72. doi: 10.1093/rpd/ncm455. Epub 2007 Nov 1.
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.
通过使用血清超滤模拟物进行26天的体外溶解试验，研究了沉积在个人阿尔法剂量计滤膜上的（238）U、（234）U和（230）Th粉尘的溶解动力学。剂量计由捷克共和国罗兹纳的“Dolní Rozínka”铀矿的矿工使用。生产商宣称的采样流速为4 l h⁻¹，采样周期通常为1个月。研究的滤膜含有125±6 mBq的（238）U，与（234）U和（230）Th处于平衡状态；未发现（232）Th系列核素。（238）U和（234）U的快速溶解半衰期为1.4天，（238）U和（234）U的缓慢溶解半衰期分别为173天和116天。未发现（230）Th有可检测到的溶解。
