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Determination of uranium isotopes in soil core samples collected on the JCO grounds after the criticality accident.
https://repo.qst.go.jp/records/43023
https://repo.qst.go.jp/records/43023f7f817b2-d891-45b8-af41-bc41ee073e3e
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2002-12-20 | |||||
| タイトル | ||||||
| タイトル | Determination of uranium isotopes in soil core samples collected on the JCO grounds after the criticality accident. | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Yoshida, Satoshi
× Yoshida, Satoshi× Muramatsu, Yasuyuki× Tagami, Keiko× 吉田 聡× 村松 康行× 田上 恵子 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In order to evaluate the impact of the 1999 criticality accident in Tokai-mura on the U isotope composition in soils, U isotopes (235U and 238U) were determined with inductively coupled plasma-mass spectrometry (ICP-MS) for soil core samples collected on the JCO grounds after the accident. The 235U/238U ratios were higher than the natural ratio in most samples. The highest ratio observed was 0.0262. Although vertical profiles of the 235U/238U ratio differed among the soil cores, the ratios tended to be high at the surface and decreased with depth. The U concentration also changed with depth. The percentages of 235U in the excess U, estimated from the positive correlation between U concentration and the 235U/238U ratio in soil samples, were less than 4 % by mass (mostly 1 - 3 %), and were much lower than the enrichment of the U used in the uranium conversion building at the time of the criticality accident (18.8 %). These findings indicate that enriched U had been released before the criticality accident during the U processing at JCO in connection with the reconversion of light water reactor fuel. Since the range of the U concentrations found was comparable to the range of uncontaminated Japanese surface soils, the amount of U added to the soil was judged negligible from a radiation protection viewpoint. | |||||
| 書誌情報 |
Environmental Science & Technology 巻 35, p. 4174-4179, 発行日 2001 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0013-936X | |||||
