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Radiation Protection Dosimetry Advance Access originally published online on November 23, 2004
Radiation Protection Dosimetry 2005 113(1):34-39; doi:10.1093/rpd/nch425
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© The Author 2004. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Uranium isotopes in public drinking water and dose assessment for man in Poland

Zofia Pietrzak-Flis*, Iwona Kaminska and Edward Chrzanowski

Central Laboratory for Radiological Protection, Konwaliowa 7, 03-194 Warsaw, Poland

* Corresponding author: pietrzak_flis{at}clor.waw.pl

238U, 234U and 235U were determined in tap water from municipal water pipes that drew their supply from surface water or ground water in various locations in Poland. Average activity concentrations of 238U, 234U and 235U in tap water from surface water were 9.6 ± 7.1, 12.8 ± 9.7 and 0.41 ± 0.31 Bq m–3, respectively, whereas from ground water they were 4.5 ± 6.0, 5.7 ± 6.9 and 0.19 ± 0.27 Bq m–3, respectively. Activity concentrations of 234U were higher than 238U. Ratios of 234U/238U ranged from 1.07 to 2.60, indicating the lack of equilibrium between these isotopes. The average 235U/238U ratio was 0.043 ± 0.008, being close to 0.046 for natural uranium. Average annual intake with water and food was 7.6 ± 5.1 Bq for 238U and 9.5 ± 6.6 Bq for 234U. Annual committed effective doses calculated from these intakes for adults were 0.34 ± 0.23 and 0.47 ± 0.32 µSv, respectively; 235U contributed to the total dose from the uranium isotopes by about 2%.


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