抄録
During the decommissioning phase of a nuclear reactor, most of the steel-reinforced concrete shielding around a pressure vessel is considered as low-level radioactive waste. It is highly desirable to reduce the radioactivity level of this waste to below the clearance level. Normally, the radioactivity of steel after irradiation is found to be proportional to the cobalt content. In this study, for the production of low-activation steel in steelmaking process. cobalt distribution between MgO-saturated FeOx-MgO-CaO-Si0 2 slag and Fe-Cu-Co molten alloy was investigated. The results are summarized as follows: (1) the distribution ratio increases with decreasing temperature and (2) the activity coefficient of CoO decreases with increasing temperature and decreasing slag basicity. Although low temperature and low basicity are suitable conditions for refining, it is extremely difficult to decrease the Co content by an oxidation reaction. because of a very small distribution ratio of cobalt.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 2636-2641 |
| ページ数 | 6 |
| ジャーナル | Materials Transactions |
| 巻 | 49 |
| 発行部数 | 11 |
| DOI | |
| 出版物ステータス | Published - 2008 11 |
| 外部発表 | Yes |
Fingerprint
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering
- Mechanics of Materials
これを引用
Distribution of cobalt between MgO-saturated FeOx-MgO-CaO- SiO2 Slag and Fe-Cu-Co molten alloy. / Kitamura, Shin Ya; Kuriyama, Hideki; Maruoka, Nobuhiro; Yamaguchi, Katsunori; Hasegawa, Akira.
：: Materials Transactions, 巻 49, 番号 11, 11.2008, p. 2636-2641.研究成果: Article
}
TY - JOUR
T1 - Distribution of cobalt between MgO-saturated FeOx-MgO-CaO- SiO2 Slag and Fe-Cu-Co molten alloy
AU - Kitamura, Shin Ya
AU - Kuriyama, Hideki
AU - Maruoka, Nobuhiro
AU - Yamaguchi, Katsunori
AU - Hasegawa, Akira
PY - 2008/11
Y1 - 2008/11
N2 - During the decommissioning phase of a nuclear reactor, most of the steel-reinforced concrete shielding around a pressure vessel is considered as low-level radioactive waste. It is highly desirable to reduce the radioactivity level of this waste to below the clearance level. Normally, the radioactivity of steel after irradiation is found to be proportional to the cobalt content. In this study, for the production of low-activation steel in steelmaking process. cobalt distribution between MgO-saturated FeOx-MgO-CaO-Si0 2 slag and Fe-Cu-Co molten alloy was investigated. The results are summarized as follows: (1) the distribution ratio increases with decreasing temperature and (2) the activity coefficient of CoO decreases with increasing temperature and decreasing slag basicity. Although low temperature and low basicity are suitable conditions for refining, it is extremely difficult to decrease the Co content by an oxidation reaction. because of a very small distribution ratio of cobalt.
AB - During the decommissioning phase of a nuclear reactor, most of the steel-reinforced concrete shielding around a pressure vessel is considered as low-level radioactive waste. It is highly desirable to reduce the radioactivity level of this waste to below the clearance level. Normally, the radioactivity of steel after irradiation is found to be proportional to the cobalt content. In this study, for the production of low-activation steel in steelmaking process. cobalt distribution between MgO-saturated FeOx-MgO-CaO-Si0 2 slag and Fe-Cu-Co molten alloy was investigated. The results are summarized as follows: (1) the distribution ratio increases with decreasing temperature and (2) the activity coefficient of CoO decreases with increasing temperature and decreasing slag basicity. Although low temperature and low basicity are suitable conditions for refining, it is extremely difficult to decrease the Co content by an oxidation reaction. because of a very small distribution ratio of cobalt.
KW - Activity coefficient
KW - Cobalt
KW - Low-activation steel
KW - Oxidation
KW - Slag basicity
UR - http://www.scopus.com/inward/record.url?scp=58149265451&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=58149265451&partnerID=8YFLogxK
U2 - 10.2320/matertrans.MAW200831
DO - 10.2320/matertrans.MAW200831
M3 - Article
AN - SCOPUS:58149265451
VL - 49
SP - 2636
EP - 2641
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 11
ER -