期刊
RSC ADVANCES
卷 11, 期 37, 页码 22611-22617出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ra03614a
关键词
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资金
- National Natural Science Foundation of China of the Chinese Academy of Sciences [XDA02030000, QYZDYSSW-JSC016, 21771188]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA02030000, QYZDYSSW-JSC016, 21771188]
- Frontier Science Key Program of the Chinese Academy of Sciences [XDA02030000, QYZDYSSW-JSC016, 21771188]
This study investigated the behavior of fission product iodine released from the melting process of a mixture consisting of UF4 irradiated with neutrons and 2LiF-BeF2 (FLiBe) salt. It was found that a large amount of iodine was released immediately during melting due to redox reaction between hot atoms. The activity ratios of I-131 to salt-seeking fission products in the fuel salt can be used as an effective diagnostic criterion for monitoring the redox potential of fuel salts in a molten salt reactor.
In this study, the behavior of fission product iodine released from the melting process of a mixture consisting of UF4 irradiated with neutrons and 2LiF-BeF2 (FLiBe) salt was studied. The experiment showed that a large amount of iodine was released immediately during melting and captured by Ni metal foils. The transient release of iodine observed in this experiment is attributed to the redox reaction between the hot atoms of the fission product iodine that cumulated due to long-time irradiation. The effect of the redox status of the molten salt on the transient release of iodine was also investigated. Based on this investigation, it was proposed that the activity ratios of I-131 to salt-seeking fission products in the fuel salt, as an effective diagnostic criterion, may be used for the surveillance of the redox potential of fuel salts in a molten salt reactor.
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