TAILIEUCHUNG - Báo cáo " Intercomparison on internal dose assessment for 131I "

The paper resented the results of assessing internal dose for 131I by the direct method for Vietnamese objects that was issued in the Intercomparison Program of IAEA. The results on experimental measurements, calculating intake (I) of 131 I to thyroid by the specilizing system for measuring thyroid activity, and committed effective dose E(50) using the specializing code of LUDEP were shown that the results carrying out at the Nuclear Research Institute (I = Bq, E (50) = mSv) were good and were in accordance with the those of the authors in other laboratories in the. | VNU Journal of Science Mathematics - Physics 25 2009 179-184 Intercomparison on internal dose assessment for 131I Nguyen Van Hung1 Bui Van Loat2 INuclear Research Institute 1 Nguyen Tu Luc Dalat 2College of Science VNU 334 Nguyen Trai Thanh Xuan Ha Noi Received 4 June 2009 Abstract. The paper resented the results of assessing internal dose for 131I by the direct method for Vietnamese objects that was issued in the Intercomparison Program of IAEA. The results on experimental measurements calculating intake I of 131I to thyroid by the specilizing system for measuring thyroid activity and committed effective dose E 50 using the specializing code of LUDEP were shown that the results carrying out at the Nuclear Research Institute I Bq E 50 mSv were good and were in accordance with the those of the authors in other laboratories in the world. Keywords Occupational exposure Intake Thyroid dose Committed effective dose LUDEP . 1. Introduction There have been several intercomparison exercises organized already at national and international levels for the assessment of occupational exposure due to intakes of radionuclides to the body. These intercomparison exercises revealed significant differences in approaches methods and assumptions and consequently in the results. Therefore IAEA organized a new intercomparison exercise in cooperation with the IDEAS project under the 5th EU Framework Programme EU Contract No. FIKR-CT2001-00160 and invited participating contries. Content of intercomparison exercises consists of assessing intakes of HTO 137Cs 90Sr 60Co 131I enriched uranium Pu and 241Am. The results were received from 42 countries with 81 participants and 72 reports in which there were 63 participants having the reports of 131I. The laboratory code of located at the Nuclear Research Institute attended this intercomparison program also 1 . This new intercomparison exercise focused especially on the effect of the guidelines for harmonization of .

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