Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690382
Title: Quantifying the uncertainties in uranium dose assessments
Author: Burt, Graeme K.
ISNI:       0000 0004 5923 1823
Awarding Body: University of Surrey
Current Institution: University of Surrey
Date of Award: 2014
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Abstract:
Signicant uncertainty is known to be present in the internal radiation dose assessments for intakes of uranium compounds. The aim of this thesis was to investigate the sources of the uncertainty in the dose assessment and in particular the biokinetic models used to describe the movement of uranium in the body. A variety of numerical and statistical approaches have been used to explore the uncertainty in the dose assessments. In particular Bayesian techniques have been applied to historical uranium in urine measurements to derive best estimates for important biokinetic parameters. Posterior probability distributions for the important lung solubility parameters have been calculated from six historical exposure cases. It was shown that improved estimates of these parameters can be obtained by sharing the information in each of the cases in the Bayesian calculation. Using these estimates, the uncertainty in the radiation doses from occupational intakes of uranium have been quantifed. Lastly, a novel Bayesian approach to identifying intakes of uranium from bioassay measurements has been developed and tested. This Bayesian approach provides a number of advantages as it incorporates the uncertainty in the bioassay measurements, intake parameters and the bioassay model parameters in a coherent way.
Supervisor: Puncher, M. Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.690382  DOI: Not available
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