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Measurement and Estimation for the Clearance of Radioactive Waste with Patients of Thyroid Treatment

갑상선 진료환자 관련 방사성폐기물의 처분을 위한 방사능 측정 및 평가

  • 김창범 (동신대학교 방사선학과) ;
  • 장성주 (동신대학교 방사선학과)
  • Received : 2014.03.17
  • Accepted : 2014.04.13
  • Published : 2014.06.28

Abstract

The generation amount of radioactive waste has been rapidly increased by increase of the usage of radioisotope source in medical field. Especially, the use of the radioactive source of I-131 with short half-life of 8.02 days used in treatment of thyroid has been increased, and all of the wastes concerned have been disposed by means of the self-disposal method. IAEA proposed criteria for clearance level of waste which depends on the individual (10 ${\mu}Sv/y$) and collective dose (1 man-Sv/y), and concentration of each nuclide (IAEA Safety Series No 111-P-1.1, 1992 and IAEA RS-G-1.7, 2004). In this study, various radioactive wastes in medical fields are collected and measured for establishing the disposal methods and procedures of radioactive wastes. In addition, comparison evaluation of decay storage period between the half-life which was calculated by attenuation curve based on real measurement and analytical half-life is considered. With comparing the theoretical half-life and the effective half life(7.72 days) which was based on the decay equation of measured data, it is resulted in the theoretical half-life is longer than effective half-life. The storage period of radioactive waste for self-disposal may be curtailed. The result of this study will be proposed as ISO standard.

Keywords

Radioactive Waste;Thyroid;Clearance level;Measurement of Radioactivity

References

  1. R. Ravichandran, J. P. Binukumar, R. Sreeram, and L. S. Arunkumar, "An overview of radioactive waste disposal procedures of a nuclear medicine," J Med Phys, Vol.36, No.2, pp.95-99, 2011. https://doi.org/10.4103/0971-6203.79692
  2. M. J. Park, J. H. Kim, J. C. Jang, C. H. Kim, J. M. Jeong, and D. S. Lee, "Optimization of Inpatient Management of Radioiodine Treatment in Korea," Nucl Med Mol Imaging, Vol.42, No.4, pp.261-266, 2008.
  3. Shapito J: Radiation Protection: A guide for scientists, regulators and Physicians, 4th ed, Harvard University Press, pp.359-371, 2002.
  4. IAEA Safety Series No.40: Applying Radiation Safety Standards in Nuclear Medicine, 2005.
  5. IAEA Safety Series No.111: Classification of Radioactive Waste, 1994.
  6. IAEA TECDOC-1183: Management of radioactive waste from the use of radionuclides in medicine, 2000.
  7. IAEA Safety Series No.111-P-1.1: Application of exemption principles to the recycle and reuse of materials from nuclear facilities, 1992.
  8. IAEA S/S No. RS-G-1.7: Application of the Concepts of Exclusion, Exemption and Clearance, 2004.
  9. 한국원자력의학원, 한국원자력안전기술원 위탁과제보고서: Measurement of Radioactive waste contaminated with Radioisotopes for medical application, 2013.
  10. 원자력안전위원회고시 제2012-59호: 방사성폐기 물의 자체처분에 관한 규정, 2012.
  11. J. S. Ryu, "Diagnostic and Therapeutic Approaches to Radioactive Iodine Refractory Differentiated Thyroid Cancer," Korean J Otorhinolaryngol- Head Neck Surg, Vol.55, pp.403-409 2012. https://doi.org/10.3342/kjorl-hns.2012.55.7.403
  12. National Cancer Center, Ministry of Health & Welfare. Cancer Facts & Figures 2011 in the Republic of Korea. Seoul, Republic of Korea; pp.6-21, 2011.
  13. ICRP Publication 94: Release of Patients after therapy with unsealed radionuclides, 2004.