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http://dx.doi.org/10.5392/JKCA.2014.14.06.255

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

Kim, Chang-Bum (동신대학교 방사선학과)
Jang, Seong-Joo (동신대학교 방사선학과)
Publication Information
The Journal of the Korea Contents Association / v.14, no.6, 2014 , pp. 255-261 More about this Journal
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;
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Times Cited By KSCI : 1  (Citation Analysis)
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