Internal dose assessments: uncertainty studies and update of ideas guidelines and databases within CONRAD project.

The work of Task Group 5.1 (uncertainty studies and revision of IDEAS guidelines) and Task Group 5.5 (update of IDEAS databases) of the CONRAD project is described. Scattering factor (SF) values (i.e. measurement uncertainties) have been calculated for different radionuclides and types of monitoring data using real data contained in the IDEAS Internal Contamination Database. Based upon this work and other published values, default SF values are suggested. Uncertainty studies have been carried out using both a Bayesian approach as well as a frequentist (classical) approach. The IDEAS guidelines have been revised in areas relating to the evaluation of an effective AMAD, guidance is given on evaluating wound cases with the NCRP wound model and suggestions made on the number and type of measurements required for dose assessment.

[1]  H. F. Schulte,et al.  A study of the variations found in plutonium urinary data. , 1969, Health physics.

[2]  Guthrie Miller,et al.  Statistical modelling of Poisson/log normal data. , 2007, Radiation protection dosimetry.

[3]  A Birchall,et al.  Estimating uncertainty on internal dose assessments. , 2007, Radiation protection dosimetry.

[4]  E Blanchardon,et al.  IDEAS internal contamination database: a compilation of published internal contamination cases. A tool for the internal dosimetry community. , 2006, Radiation protection dosimetry.

[5]  D. Hilmas,et al.  APPLICATION OF MULTI-COMPARTMENT WOUND MODELS TO PLUTONIUM-CONTAMINATED WOUNDS INCURRED BY FORMER WORKERS AT ROCKY FLATS , 2006, Health physics.

[6]  J. Marsh,et al.  Obtaining an unbiased estimate of intake in routine monitoring when the time of intake is unknown. , 2006, Radiation protection dosimetry.

[7]  C. M. Castellani,et al.  IDEAS Work Package 3 Evaluation of Incorporation Cases , 2004 .

[8]  N. Ishigure.  Prediction of monitoring data for 239Pu accidentally injected via wound site based on the proposed NCRP wound model. , 2007, Radiation protection dosimetry.

[9]  I. Malatova,et al.  Internal dosimetry: towards harmonisation and coordination of research. , 2008, Radiation protection dosimetry.

[10]  T. Pellmar.  Development of a Biokinetic Model for Radionuclide-Contaminated Wounds and Procedures for Their Assessment, Dosimetry and Treatment , 2008 .

[11]  A. Riddell,et al.  PLUTO - A Software Package using the 'Maximum Likelihood Method' to Fit Plutonium in Urine Data to an Excretion Function , 1994 .

[12]  I. Malátová,et al.  A structured approach for the assessment of internal dose: the IDEAS guidelines. , 2007, Radiation protection dosimetry.

[13]  H. Martz,et al.  Using exact Poisson likelihood functions in Bayesian interpretation of counting measurements. , 2002, Health physics.

[14]  Development and application of anthropomorphic voxel phantom of the head for in vivo measurement. , 2007, Radiation protection dosimetry.

[15]  M R Bailey,et al.  Evaluation of scattering factor values for internal dose assessment following the IDEAS guidelines: preliminary results. , 2007, Radiation protection dosimetry.

[16]  Icrp.  Age-dependent doses to members of the public from intake of radionuclides: Part 4 Inhalation dose coefficients , 1995, Annals of the ICRP.

[17]  J. Marsh,et al.  Avoiding biased estimates of dose when nothing is known about the time of intake. , 2007, Radiation protection dosimetry.