Dosimetry study and radiation effects for the residents near Semipalatinsk nuclear test site

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One of the most important occasion of the study within the years from 2003 to 2004, is the workshop (3rd international workshop for the dosimetry in Dolon Semipalatinsk) held at Hiroshima University on 9-11 March, 2005, which was supported by Science promotion agency in Japan. This workshop was planned after the dosimetry workshop which was held in Semipalatinsk in September 2002. The presentations were 63 including 26 foreign speakers. The main topic of this workshop was the Dolon dosimetry. We have been performed research for 2 years. The major subjects are 1. international intercomparison of thermoluminescence dosimetry (TLD) using brick samples, 2. tooth enamel dosimetry by ESR method, 3. calculation of radiation from radioactive clouds, 4. measurements of radioactivity in soil and 5. chromosome aberration detection. In conclusion, TLD indicates 0.5 Gy, ESR does from 0,1 to 0.5 Gy, the calculation corrected due to the change of the center of radioactive clouds resulted in about 0.5 Gy, the chromosome aberration studies were not clear but one of the study indicated 0.3 Gy, which was not contradict to the other results. Due to these result we can conclude 0.5 Gy in Dolon is most probable on the other hands the former estimations fluctuated from 0 to 2 Gy. This is the most important result. The major problem has been solved therefore we should proceed to personal dosimetry.The study in Semipalatinsk was performed with Dr.Yamamoto's group, Kanazawa University, examined with Dr.Takeichi's group in Saljal, Karaul, Kokpecti and etc. The chromosome aberration and yield of micro nuclei have been studied with Dr.Tanaka's group also. Dr.Katayama installed our computer server and constructing databases.