The Experience on Intake Estimation and Internal Dose Assessment by Inhalation of Iodine-131 at Korean Nuclear Power Plants

국내 원전에서 $^{131}I$ 내부 흡입 에 따른 섭취량 산정과 내부피폭 방사선량 평가 경험 몇 개선방향에 대한 연구

  • Published : 2009.09.30


During the maintenance period at Korean nuclear power plants, internal exposure of radiation workers occurred by the inhalation of $^{131}I$ released to the reactor building when primary system opened. The internal radioactivity of radiation workers contaminated by $^{131}I$ was measured using a whole body counter. Intake estimation and the calculation of committed effective dose were also conducted conforming to the guidance of internal dose assessments from publications of International Commission on Radiological Protection. Because the uptake and excretion of $^{131}I$ in a body occur quickly and $^{131}I$ is accumulated in the thyroid gland, the estimated intakes showed differences depending on the counting time after intake. In addition, since ICRP publications do not provide the intake retention fraction (IRF) for whole body of $^{131}I$, the IRF for thyroid was substitutionally used to calculate the intake and subsequently this caused more error in intake estimation. Thus, intake estimation and the calculation of committed effective dose were conducted by manual calculation. In this study, the IRF for whole body was also calculated newly and was verified. During this process, the estimated intake and committed effective dose were reviewed and compared using several computer codes for internal dosimetry.


  1. International Commission on Radiological Protection. Individual Monitoring for Internal Exposure of WorkersReplacement of ICRP Publication 54, ICRP Publication 78.Pergamon Press. 1997
  2. United States Nuclear Regulatory Commission. Regulatory Guide 8.20; Application of Bioassay for I-125 and I-131,US NRC. 1979
  3. 김희근. 요오드-131 흡입에 따른 내부피폭 선량평가 방법의 고찰, 2003 KINS 방사선안전평가 심포지엄, 교육문화회관. 2003
  4. 한국수력원자력(주) 원자력교육원. 제21기 방사선(안전, 방재)관리자. 2005
  5. 한국원자력안전기술원. 원자력안전전문위원회 원자로계통분과 보고자료; 울진 3호기 냉각재 고방사능 경보관련 현황보고. 2002.12.4.
  6. 한국수력원자력(주). 원자력발전소 표준기술행정절차서, 내부피폭 방사선량 측정 및 평가, 표준기행 방사선-06.2003
  7. Canberra. Operation Manual for Model 2250 FASTSCAN:High-throughput Whole Body Counter. 2002
  8. Canberra. Abacos Plus Body Burden System Operation,SU-425-4. 2003
  9. International Commission on Radiological Protection.Individual Monitoring for Intakes of Radionuclides by Workers:Design and Interpretation, ICRP Publication 54. 1987
  10. 한전전력연구원. 일본 방사선총합 연구소(NIRS) 소속 방사선량 평가 전문가 초청결과 보고서, TM.02NE07. P2003.062, 2003
  11. Ishigure N. Graphic Database on Predicted Monitoring Data for Intakes of Radionuclide. NIRS Website. 2003
  12. United States Nuclear Regulatory Commission. NUREG-1465; Accident Source Terms for Light Water Nuclear Power Plants, US NRC, 1995
  13. James T, Birchall A. User Manual for IMBA Experts USDOE-Edition, ACJ Associates, Ver. 2.0.22, 2002
  14. National Radiological Protection Board. LUng Dosimtery Evaluation Program (LUDEP). 2000
  15. International Atomic Energy Agency. Assessment of Occupational Exposure Due to Intake of Radionuclides,Safety Guide No. RS-G-1.2. 1999
  16. International Atomic Energy Agency. International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources. IAEA Safety Series No. 115, Vienna, 1996
  17. International Commission on Radiological Protection. 1990 Recommendation of the International Commission on Radiological Protection. ICRP Publication 60. PergamonPress, 1991
  18. 교육과학기술부. 과학기술부 고시 제2008-31호, 방사선방호등에 관한 기준. 2003
  19. 교육과학기술부. 과학기술부 고시 제2008-51호, 재부피폭 방사선량의 측정 및 산출에 관한 규정. 2002
  20. Pacific Northwest National Laboratory. Code for Internal DosimetrY (CINDY version 1.3). 1992
  21. National Institute of Radiological Science. MONDALComputer Code for Internal Dosimetry. 2003
  22. 한전전력연구원. 내부피폭 선량평가 방법 및 계산코드 검증결과 보고서, TM.02NE07.P2003.153, 2003
  23. 한전전력연구원. 내부피폭 선량평가 코드(KIDAC) 섭취잔류 분율 및 화학형 개정보고서, TM.02NE07.P2003.168, 2003
  24. 한국수력원자력(주). 내부피폭 방사선량평가에 관한 기술기반 보고서(경수로 원전). 2003
  25. 한전전력연구원. 내부피폭 선량평가 및 방사선피폭저감 기술개발 관련 세미나 결과보고서, TC.02.NE07.W2003.158, 2003