| Project/Area Number |
14380253
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
環境影響評価(含放射線生物学)
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| Research Institution | Sapporo Medical University (2004)
Hiroshima University (2002-2003) |
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Principal Investigator |
TAKADA Jun Sapporo Medical University, School of Medicine, Professor, 医学部, 教授 (00274134)
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| Co-Investigator(Kenkyū-buntansha) |
HOSHI Masaharu Hiroshima University, Institute for Radiation Biology and Medicine, Professor, 原爆放射線医科学研究所, 教授 (50099090)
OKAMOTO Tetsuji Hiroshima University, Graduate School of Biomedical Sciences, Professor, 大学院・医歯薬学総合研究所, 教授 (00169153)
SATO Hitoshi Ibaraki Prefectural University of Health Science, School of Health Science, Associate Professor, 保健医療学部, 助教授 (90285057)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥8,500,000 (Direct Cost: ¥8,500,000)
Fiscal Year 2004: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2003: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2002: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | Semipalatinsk / dosimetry / TLD / ESR / small nuclear weapon / terrorism / radiation Protection / 外部被曝線量 / 核兵器 |
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| Research Abstract |
The purpose of this study is external dose reconstruction for population around the former Soviet UnionSemipalatinsk Nuclear Weapon Test Site from discussion on thereto luminescence dosimetry on brick and electron spin resonance on tooth enamel exposed to nuclear radiation.
The influence of the sun light revelation on enamel ESR dosimetry has been studied. For g □=2.0018, a dose of 50-70 kJ/cm2 for sun light is equivalent to a y dose of 1 Gy. We understand sun light irradiation influence of a tooth in the mouth for dozens of years afteryradiation exposure. In addition to past transient gamma ray radiation exposure, sun light exposure of a long term to a mouth is added as a part of ESR dose.
There is a tendency that an ESR dose on a tooth is considerably lower than a brick TLD dose. External dose for Dolon village is estimated to be 0.71+_-4.14 Gy from TLD, on the other hand is estimated to be 0.l-0.2 Gy for two Dolon village inhabitants (59 years old and 58 years old) from ESR. In additi
… More
on, their age in the first nuclear explosion in 1949 is estimated to be about 10 years old. Confirmation of residential records of the inhabitants is necessary.
We analyzed long-term nuclear hazards in and around surface nuclear explosion which we discovered by
local investigation of 2002. The crater size of 30 m in diameter suggests a nuclear surface explosion with 0.1-0.3 kt output. This corresponds to experiments in 1961 on an experiment chronological table of the Soviet Union tunes that the Russian Atomic Energy Ministry and Department of Defense reported in 1996.
Radioactive fallout after surface nuclear explosion is a main source of radiation exposure of these residence ward inhabitants. We think that development of radiation protection computer system as nucleus anti-disaster measures is demanded in future about a problem in a direction of a nation protection basis indicator of nuclear terrorism measures. Research work in and around the nuclear weapon test site of the former Soviet Union should be useful for this purpose. Less
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