|
|
|
| Activity for Workers Exposed to Plutonium by Vivo Measurements of 241Am |
| WU Meng-meng, PANG Hong-chao, LUO Zhi-ping |
| China Institute of Atomic Energy, Beijing 102413 China |
|
|
|
|
Abstract Objective To intriduce an algorithm for performing quantitative estimation of individual doses for workers, using the results of in vivo measurements of 241Am by lung counting.Methods The algorithm applies the ICRP Publication 66/67 models about americium、plutonium and takes into account such parameters as the 241Pu/239Pu ratio, effective aging time of mixed fission products and actinides, particle size distribution of plutonium aerosols and some other parameters. It can estimate the activity for workers exposed to plutonium by in vivo measurements of 241Am.Results It showed that regular in vivo measurements of 241Am in the lungs allow the detection of a single intake of plutonium at a level of the order of one ALI.Conclusion It indicates the algorithm, could be a good monitoring programme for individuals involved in operations with plutonium treated in nuclear fuel cycle.
|
|
Received: 09 January 2016
|
|
|
|
|
|
[1] International Commission on Radiological Protection. Individual Monitoring for Internal Exposure of Workers. ICRP Publication 78[P]. 2005.
[2] International Commission on Radiological Protection. Human Respiratory Tract Model for Radiation Protection (Oxford:Pergamon Press) ICRP Publication 66[P]. ICRP,1993, 24(1-3).
[3] International Commission on Radiological Protection. Age-dependent Doses to Members of Public from Intake of Radionuclides: Part 2. Ingestion Dose Coefficients (Oxford: Elsevier Science) ICRP Publication 67[P]. Ann. ICRP 23(3/4), pp 121-139 (1993).
[4] Ishigure N, Enomoto H, Nakano T, et al. Validity of 241Am as a Tracer of Inhaled Pu in External Chest Counting[J]. Radiat. Prot Dosim. 1998,79(1-4):133-136.
[5] Leggett R W, Eckerman K F and Williams L R. An Elementary Method for Implementing Complex Biokinetic Models[J].Health Phys.1994, 64(3): 260-271. |
|
|
|
