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General guidelines for the harmonisation of internal dose assessment: the "IDEAS" project


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European IRPA congress, Florence, 8-11 October 2002 CM. Castellani, A. Andrasi, M. Bailey, V. Berkovski, H. Doerfel, C. Hurtgen, JR. Jourdain, B. Le Guen.

Résumé

The aim of the IDEAS project is to develop guidelines to standardise assessments of internal doses. The guidelines will be based on research into the various assumptions that are made in conducting internal dose assessments. They will be developed by a group of experts, in consultation with internal dosimetry professionals from across Europe. To ensure that the guidelines are applicable to a wide range of practical situations, the first step will be to compile a database of cases of internal contamination, which include monitoring data suitable for assessment. In parallel, a study will be conducted of algorithms (mathematical methods) for assessing intakes from monitoring data. Improved algorithms will be developed and incorporated in existing software, which will be distributed to the partners. At least 50 cases from the database will be assessed using the software, with at least two independent assessments of each case. The results will be collated, and differences in assumptions identified, with their effects on the assessed dose. From the results, and other investigations on each factor, draft guidelines will be prepared for the evaluation of internal monitoring data. A Workshop will be held, open to internal dosimetry professionals, to describe the database and evaluation, and in particular, to discuss the draft guidelines. The guidelines will be revised on the basis of the discussion. An intercomparison exercise on internal dose assessment will then be conducted, which will again be open to all professionals involved in internal dosimetry. Several examples from the database will be circulated to participants, with a copy of the revised guidelines, which participants will be encouraged to follow, in order to test their applicability and effectiveness. The results will be collated and a second Workshop held to discuss the results with the participants. The guidelines will be refined on the basis of the experience and discussion, and put forward as a basis for national and international guidance.