Abstract
Results of in vivo measurements are presented, for a worker who was accidentially contaminated with 241 Am approximately 26 years earlier. The skeletal burden was measured by means of one HPGe detector positioned at different regions of the head. Activities in both lungs and the liver were measured by means of four HPGe detectors. Present activity estimates are about 6600 ± 600 Bq for the skeleton, about 400 ± 60 Bq for the lung, and about 80 ± 30 Bq for the liver. For this case, corresponding results of excretion measurements are 35.8 ± 2.5 mBq per day for urine, and 14.5 ± 2.4 mBq per day for faeces. The results are compared with those from other laboratories, and discussed in terms of currently available biokinetic models. The model used in ICRP Publication 78 is modified in order to describe all experimental data, and dose estimates are given.
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