Authors:
E. Lee Korea Atomic Energy Research Institute 1045 Daedeok-daero, Yuseong-gu Deajeon Korea

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J. Lim Korea Atomic Energy Research Institute 1045 Daedeok-daero, Yuseong-gu Deajeon Korea

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D. Chung Korea Atomic Energy Research Institute 1045 Daedeok-daero, Yuseong-gu Deajeon Korea

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H. Yang Korea Atomic Energy Research Institute 1045 Daedeok-daero, Yuseong-gu Deajeon Korea

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J. Yoo Korea Atomic Energy Research Institute 1045 Daedeok-daero, Yuseong-gu Deajeon Korea

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K. Kim Korea Atomic Energy Research Institute 1045 Daedeok-daero, Yuseong-gu Deajeon Korea

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Abstract  

This study was carried out to investigate the characteristics of an oxidative-dissolution of fission products (FP) when uranium (U) is dissolved in a Na2CO3–H2O2 carbonate solution. Simulated FP-oxides which contained 12 components were added to the solution to examine their dissolution behaviors. It was found that H2O2 was an effective oxidant to minimize the dissolution of FP. For the 0.5 M Na2CO3–0.5 M H2O2 solution, such elements as Re, Te, Cs, and MoO2 were dissolved with yields of 98 ± 2%, 98 ± 2%, 93 ± 2%, and 26 ± 3%, respectively, for 2 h. Among these components, Re, Te, and Cs were completely dissolved within 10–20 min without regard to the concentrations of Na2CO3, and H2O2 due to their high solubility in the carbonate solution with and without H2O2. However, MoO2 was very slowly dissolved and its yield was 29 ± 3% for 4 h. The pH of the dissolved solution revealed the greatest influence on the dissolution yields of the FP, exhibiting the most effective pH condition in the range of 10–12 in order to create a considerable suppression of the co-dissolution of FP during the oxidative-dissolution of U.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)