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Oeh, U. ; Priest, N.D.* ; Li, W.B. ; Ragnarsdottir, K.V.* ; Höllriegl, V. ; Thirlwall, M.F.* ; Giussani, A.* ; Schramel, P. ; Roth, P. ; Paretzke, H.G.

Measurements of daily urinary uranium excretion by German KFOR personnel and residents of Kosovo to assess potential intakes of Depleted Uranium (DU).

Vortrag: Internal Dosimetry of Radiokuclides, 2-5 October 2006, Montpellier, France. (2006)
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Following the end of the Kosovo conflict, in June 1999, an investigation was instigated to evaluate the size of the health risk, if any, presented by depleted uranium (DU) to German KFOR personnel serving in the Balkans. In addition, the investigations were extended to residents of Kosovo, who had been living in areas where DU munitions were deployed. In order to assess a possible DU intake both the urinary uranium excretion of volunteer residents and environmental samples were collected and analysed using ICP-MS. Measurements by ICP-MS require only small sample volumes of a few ml. Urine sampling, transport and storage until measurement, etc. would be much easier if cumulative, 24-hours collections were not required. For that reason, in the first part of the study, the urine sampling method was analysed in order to evaluate the suitability of spot collections for urinary uranium excretion determination. However, it was concluded that 24-hr urine sampling should be performed to avoid large uncertainties in the quantitation of daily urinary excretion values. In the second part of the study, the uranium excretion by German KFOR personnel serving on the Balkans was investigated. In total, more than 1300 urine samples from soldiers, civil servants and unexposed controls of different genders and age were analysed to determine uranium excretion parameters. The volunteers, aged from 3 to 92 years, were grouped into 10-year age groups for evaluation. For all 1199 male subjects, the arithmetic mean of the uranium excretion rate was 19.96 ± 19.13 ng/d (mean ± SD), equivalent to 247.5 ± 237.2 mBq/d. For 118 female volunteers, an average uranium excretion rate of 16.65 ± 17.57 ng/d (mean ± SD)) was measured, corresponding to 206.5 ± 217.9 mBq/d. Inter-subject variation in uranium excretion was high and no significant age-specific differences were found. Most significantly, the levels of uranium excretion by KFOR personnel and unexposed individuals were similar. It can be concluded that KFOR personnel were not exposed to biologically relevant amounts of DU intake during their stay in Kosovo. The third part of the study monitored 24-hour urine samples provided by selected residents of Kosovo, adjacent regions of Serbia and controls from Munich, Germany. The urine samples collected were split and analysed in the frame of an inter-comparison study. Total uranium and isotope ratios were measured in order to determine DU content. 238U/235U ratios were within ±0.3% of the natural value, and 236U/238U was less than 0.0000002, indicating no significant DU in any of the urine samples provided, despite total uranium excretion being sometimes very high. 
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Publikationstyp Sonstiges: Vortrag
Konferenztitel Internal Dosimetry of Radiokuclides
Konferzenzdatum 2-5 October 2006
Konferenzort Montpellier, France