Distribution of the radiation dose of mammal teeth from South Ural region contaminated by a radiation accident in former Soviet Union

前苏联南乌拉尔地区辐射事故污染哺乳动物牙齿辐射剂量分布

• 批准号: 15405006
• 负责人: TOYODA Shin
• 金额: $ 7.42万
• 依托单位: Okayama University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15405006/
• 关键词: ESR; hydroxyapatite; tooth; radiation dose; accident dose; Ural; Semipalatinsk; 被爆線量

Radioactive nuclei released by radiation accidents of nuclear power plant and by nuclear tests caused serious contamination especially in former Soviet Union which has affected human health. It would be most useful to measure the ESR signal intensities of human teeth in order to estimate the dose of individual human, however, human teeth are not always available. In the present study, we collected mammal teeth in order to investigate the distribution of radiation does in the contaminated areas.The images of distribution of ^<90>Sr in the cow teeth collected at farms of South Ural region were obtained by Fuji imaging plates with photostimulated luminescence. The average concentrations were correlated well with the level of soil contamination. However, there are still variations in the ^<90>Sr concentration even within the same farm. We tried to obtain the feeding record for the cows, but have not been successful so far. The best chemical conditions to extract enamel from the whole teeth were determined by the experiments changing the temperature, concentration, and duration of alkaline treatments. ESR measurements of some of the teeth from the region showed doses up to 200 mGy. But this largest value should be considered to be a preliminary result.The present environmental radiation doses of the Semipalatinsk nuclear test site and the regions nearby were not so high, up to twice or three times as high as that of background, however, some of the mammal teeth showed ^<90>Sr concentrations up to several Bq/g where no significant soil contamination has not been reported. We have not identified what gave such an high contamination level in mammal teeth so far.

核电站辐射事故和核试验释放的放射性核造成了严重的污染，特别是在前苏联，影响了人类的健康。测量人类牙齿的ESR信号强度以估计个体人的剂量是最有用的，然而，人类牙齿并不总是可用的。为了研究放射性剂量在污染区的分布，我们采集了哺乳动物牙齿，<90>用富士光激发发光成像板获得了南乌拉尔地区奶牛牙齿中~（13）Sr的分布图像。平均浓度与土壤污染程度相关性良好。然而，<90>即使在同一农场内，^ Sr浓度仍然存在差异。我们试图获得奶牛的饲养记录，但迄今为止还没有成功。通过改变碱处理的温度、浓度和持续时间的实验，确定了从全牙中提取釉质的最佳化学条件。对该地区一些牙齿的ESR测量显示，剂量高达200毫戈瑞。塞米巴拉金斯克核试验场及其附近地区目前的环境辐射剂量并不高，最高可达本底的2 ~ 3倍，但在一些哺乳动物牙齿中发现的^<90>Sr浓度高达几Bq/g，而在这些地方，土壤污染还没有明显的报道。到目前为止，我们还没有确定哺乳动物牙齿中如此高的污染水平是什么。

项目成果

The 3rd international intercomparison on EPR tooth dosimetry : Part 1, general analysis

第三届EPR牙齿剂量测定国际比对：第1部分，一般分析

• 发表时间: 2005
• 期刊: Applied Radiation and Isotopes 62
• 作者: Khailov;A.;平林今日子;片山博昭;川野徳幸;V.F.Stepanenko;V.F.Stepanenko;H.Sato;H.Y.Goksu;A.Ivannikov;K.Zhumadilov;A.Romanyukha;V.Skvortsov;S.Toyoda;A.Sevan'kaev;K.Tanaka;M.Yamamoto;N.Semioshkina;A.Sakaguchi;E.Tieliewuhan;T.Imanaka;K.Gordeev;K.Gordeev;S.L.Simon;V.F.Stepanenko;K.Tanaka;N.Chaizhunusova;N.Takeichi;Y.Taooka;Z.Zhumadilov;H.Katayama;N.Kawano;N.Kawano;M.Matsuo;星 正治;武市 宣雄;Stepanenko V.F.;Stepanenko V.F.;Sato H.;Goksu H.Y.;Ivannikov A.;Zhumadilov K.;Romanyukha A.;Skvortsov V.;Toyoda S.;Sevan'kaev A.;Tanaka K.;Yamamoto M.;Semioshkina N.;Sakaguchi A.;Tieliewuhan E.;Imanaka T.;Gordeev K.;Gordeev K.;Simon S.L.;Stepanenko V.F.;Tanaka K.;Chaizhunusova N.;Takeichi N.;Taooka Y.;Zhumadilov Z.;Katayama H.;Kawano N.;Kawano N.;Matsuo M.;Hoshi M.;Takeichi N.;星 政治;A.Ivannikov;M.Yamamoto;E.Tieliewuhan;星 正治;星 正治;T.Imanaka;S.Toyoda;A.Wieser
• 通讯作者: A.Wieser

Around Semipalatinsk Nuclear Test Site : Progress of dose estimation relevant to the consequences of nuclear tests

塞米巴拉金斯克核试验场周围：与核试验后果相关的剂量估算进展

• 发表时间: 2006
• 期刊: Jour.Radiat.Res 47
• 作者: V.Stepanenko;M.Hoshi;I.K.Bailiff;A.I.Ivannikov;S.Toyoda;M.Yamamoto;S.L.Simon;M.Matsuo;N.Kawano;Z.Zhumadilov;M.S.Sasaki;R.I.Rosenson;K.N.Apsalikov
• 通讯作者: K.N.Apsalikov

S.Toyoda, Y.Ueda, H.Imata, A.Romanyukha, M.Hoshi, N.Lyubashevskiy, C.Miyazawa: "ESR dosimetry and ^<90>Sr concentration of cow teeth from Southern Urals"Proceedings for the 11^<th> International Congress of the International Radiation Protection Associati

S.Toyoda、Y.Ueda、H.Imata、A.Romanyukha、M.Hoshi、N.Lyubashevskiy、C.Miyazawa：“乌拉尔南部牛牙的 ESR 剂量测定和 ^<90>Sr 浓度”11^ 会议记录

Toward ESR dosimetry of mammal teeth of high sensitivity : The effect of chemical treatment

高灵敏度哺乳动物牙齿的 ESR 剂量测定：化学处理的效果

• 发表时间: 2006
• 期刊: Jour. Radiat. Res. 46
• 作者: S.Toyoda;H.Imata;A.romankyukha;M.Hoshi
• 通讯作者: M.Hoshi

Results of EPR dosimetry for population in the vicinity of the most contaminated radioactive fallout trace after the first nuvlear test in the Semipalatinsk Test Site

塞米巴拉金斯克试验场首次核试验后污染最严重的放射性沉降物痕迹附近人口的 EPR 剂量测定结果

• 发表时间: 2006
• 期刊: Jour.Radiat.Res 47
• 作者: A.Ivannikov;K.Zhumadilov;E.Tieliewuhan;L.Jiao;D.Zharlyganova;K.N.Apsalikov;G.Berekenova;Z.Zhumadilov;S.Toyoda;C.Miyazawa;V.Skvortsov;V.Stepanenko;S.Endo;K.Tanaka;M.Hoshi
• 通讯作者: M.Hoshi