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Contamination of seven workers with 241Am

  • I. Malátová (a1), V. Becková (a1), H. Pospíšilová (a1) and R. Filgas (a1)


Widespread contamination occurred in the building in which radiation waste was handled. An occurrence of internal contamination of workers was also suspected. Therefore, workers were measured in vivo and bioassay was performed too. Estimation of committed effective dose had to be based on results of excretion analysis as irremovable surface contamination occurred on the skin and hair of workers, thus influencing results of in vivo measurements. The results of bioassay of 7 workers are presented. Intakes and committed effective doses were calculated from excretion data using IMBA Professional Plus software. The best fits for the most of workers were obtained when combination of acute and chronic intakes was used. Acute intakes varied from 135 Bq to 1300 Bq, chronic intakes from 0.03 Bq/d to 0.3 Bq/d. Committed effective doses from 3 to 36 mSv were estimated for individual workers.



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[1] Doerfel H., Andrasi A., Bailey M. et al. (2005) General Guidelines for the Estimation of Committed Effective Dose from Incorporation Monitoring Data (Project IDEAS- EU Contract No. FIKR-CT 2001-00160).
[2] Dulaiová H., Becková V., Bucina I. (2004) Determination of Americium by Extraction Chromatography in Urine Samples, IRPA Regional Congress on Radiation Protection in Central Europe, Budapest, August.
[3] ICRP Publication 78 (1997) Individual Monitoring for Internal Exposure of Workers, Ann. ICRP 27(3/4).
[4] Investigation Team Report (2000) Investigation of the source of potential internal radiological exposures involving eleven personnel in Building 771, Kaiser–Hill Company, Rocky Flat, March 15.
[5] Klener V., Malátová I., Pelclová D. (2003) The contamination of workers with americium 241Am during dismantling and disposing of glove boxes, Ceské pracovní lékarství 4, 173-177.
[6] Malátová, I., Foltánová, Š., Becková, V., Filgas, R., Pospíšilová, H., Hölgye, Z. (2003a) Assessment of occupational doses from internal contamination with 241Am, Rad. Prot. Dosim. 105, 325-328.
[7] Malátová I., Becková V., Pospíšilová H. (2003b) Internal contamination with 241Am during handling of radioactive waste, IRPA Regional Congress on Radiation Protection in Central Europe, September 22–26, Bratislava, Slovakia, Proceedings on CD Rom, ISBN 80-88806-43-7.
[8] Pelclová, D., Fenclová, Z. (2004) Occupational contamination with americium and Ca-DTPA treatment, Radiprotection 39, 383-388.
[9] Regulation SÚJB (2002) Regulation SÚJB on Radiation Protection, 307/2002 Coll.
[10] Report SÚJB (2002) Contamination of workers with 241Am during waste processing operations. State Office for Nuclear Safety. Prague, Czech Republic.


Contamination of seven workers with 241Am

  • I. Malátová (a1), V. Becková (a1), H. Pospíšilová (a1) and R. Filgas (a1)


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