Effects of AMAD, Absorption Type, and Intake Pattern on the Result of Evaluation for Internal Dose by Inhalation of Uranium

우라늄의 입자크기, 흡수형태 및 섭취형태가 내부피폭선량 평가 결과에 미치는 영향

  • Published : 2003.12.30

Abstract

The effects of AMAD, absorption type, and intake pattern were compared and analysed for the internal dose evaluation of workers who chronically inhale uranium. The committed effective doses$(E_{50})$ based on AMAD, absorption type, and intake pattern were evaluated using 3 monthly lung predicted monitoring data due to a chronic intake of uranium for 5 years. The relative error ranges of $E_{50}$ evaluated with each AMAD$(0.1{\sim}10{\mu}m)\;to\;E_{50}$ evaluated with $5{\mu}m$ AMAD were $-37.0{\sim}49.8%$, and the relative error ranges of En evaluated with Type M to $E_{50}$ evaluated with Type S were $15.9{\sim}56.6%$, and the relative error ranges of $E_{50}$ evaluated with an acute intake to $E_{50}$ evaluated with a chronic intake were $0.55{\sim}4.52%$. Thus AMAD and the absorption type affected the results of $E_{50}$, but the intake pattern didn't really affect the results of $E_{50}$.

방사선작업종사자가 우라늄을 5년간 만성 흡입섭취하는 경우, 우라늄의 입자크기$(0.1{\sim}10{\mu}m)$, 흡수형태(Type M, Type S) 및 섭취형태(급성, 만성)가 방사선작업종사자의 내부피폭선량 평가 결과에 미치는 영향을 분석하였다. 우라늄을 1 Bq/day의 섭취율로 섭취할 경우 매분기 폐 방사능 값을 계산하여 실제 일상감시에서의 폐 방사능 측정값으로 간주하였고, 이 측정값으로부터 섭취량 및 예탁유효선량을 평가하였다. 5년간의 우라늄 섭취로 인한 예탁유효선량 평가 결과는 입자크기에 따라 $-37.0{\sim}49.8%$, 흡수형태에 따라 $15.9{\sim}56.6%$, 섭취형태에 따라 $0.55{\sim}4.52%$의 오차를 보였다. 이와 같이 입자크기 및 흡수형태는 분기별 측정값에 근거한 예탁유효선량 평가 결과에 큰 영향을 주었으나, 섭취형태는 평가 결과에 거의 영향을 주지 않는 것으로 나타났다.

Keywords

References

  1. International Commission on Radiological Protection, Individual Monitoring for Internal Exposure of Workers Replacement of ICRP Publication 54, ICRP Publication 78, Ann ICRP. 27(3/4), Pergamon Press, Oxford, UK (1997)
  2. International Commission on Radiological Protection, Individual Monitoring for Internal Exposure of Workers: Design and Interpretation, ICRP Publication 54, Ann ICRP. 19(1-3), Pergamon Press, Oxford, UK (1988)
  3. International Commission on Radiological Protection, Limits for Intakes of Radionuclide by Workers, ICRP Publication 30, part 1, Ann ICRP. 2(3/4), Pergamon Press, Oxford, UK (1979a)
  4. International Commission on Radiological Protection, Human Respiratory Tract Model for Rdiological Protection, ICRP Publication 66, Ann ICRP. 24(1-4), Pergamon Press, Oxford, UK (1994a)
  5. Tae Young Lee, Jong II Lee, Si Young Chang, 'The BiDAS: Bioassay Data Analysis Software for Evaluating Radionuclide Intake and Dose', 2003 International Symposium on Radiation Safety Management, pp. 606-613, November 5-7, Daejeon, Korea (2003)
  6. 이종일, 이태영, 장시영 '방사성핵종의 흡입섭취 후 전신, 장기 및 배설물에서의 섭취량 분율 계산', 한국원자력학회 2002년도 추계 학술발표회 논문집, 10.24-25, 용평 리조트 (2002)
  7. 이종일, 이태영, 장시영, 이재기, '방사능 입자 크기에 따른 예탁유효선량 평가 오차를 최소화하기 위한 특별감시기간 결정', 한국원자력학회 추계학술발표회 논문집, 2003.10.30- 31, 용평리조트 (2003)
  8. International Commission on Radiological Protection, The ICRP Database of Dose Coefficients: Workers and Members of the Public. Version 1.0. CD-Rom distributed by Elsevier Science Ltd., Oxford and New York (1998)