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Geng J, Zhao Z, Cheng Z, Li W, Dou Q, Li Q. Activity Measurement of Iodine Fission Products in 2LiF-BeF 2 Salt and Its Application in Redox Potential Surveillance for a Thorium Molten Salt Reactor. Inorg Chem 2022; 61:7406-7413. [PMID: 35508183 DOI: 10.1021/acs.inorgchem.2c00436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The activities of 131I, 132I, 133I, and 135I produced by neutron-induced fission of 235U in 2LiF-BeF2 (FLiBe) eutectic salt and their dependence on the redox potential were studied. The dependence observed experimentally suggested that the activity ratio for 131I to 132I could be used as an indicator of the redox potential for FLiBe salt. Relying on the selective adsorption of iodine ions on the activated silver probe by ion exchange, a novel method for activity distribution measurement of the iodine isotopes in FLiBe salt was founded. The method is simple, fast, and easy to operate and would be suitable particularly to in situ monitor the redox potential of a thorium molten salt reactor, where the redox potential should keep at a high level to avoid possible safety risk induced by 233Pa deposition in the reactor.
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Affiliation(s)
- Junxia Geng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,Center for Excellence on TMSR Energy System, Chinese Academy of Sciences, Shanghai 201800, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhongqi Zhao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,Center for Excellence on TMSR Energy System, Chinese Academy of Sciences, Shanghai 201800, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhiqiang Cheng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,Center for Excellence on TMSR Energy System, Chinese Academy of Sciences, Shanghai 201800, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenxin Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,Center for Excellence on TMSR Energy System, Chinese Academy of Sciences, Shanghai 201800, China
| | - Qiang Dou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,Center for Excellence on TMSR Energy System, Chinese Academy of Sciences, Shanghai 201800, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qingnuan Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,Center for Excellence on TMSR Energy System, Chinese Academy of Sciences, Shanghai 201800, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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Robertson SG, Short MP. Design and performance of a molten fluoride salt-compatible optical thermophysical property measurement system. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:064905. [PMID: 34243588 DOI: 10.1063/5.0049727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 05/27/2021] [Indexed: 06/13/2023]
Abstract
Accurate knowledge of molten salt thermophysical properties is crucial to optimize the efficiency, safety, and reliability of molten salt based energy applications. For molten fluorides, currently of high interest for fission and fusion reactors, data regarding these properties are either poor or non-existent. Thermal diffusivity and sound speed in particular play important roles in the modeling of a reactor's steady state, transient, and accident scenarios. Fluoride salt-compatible property measurement systems have thus far been the bottleneck in accurately obtaining these properties. We present the design of an optical system optimized for molten fluoride salt thermophysical property measurement, along with characterization of its thermal performance. Demonstration of system capabilities is achieved through acquisition of sound speed and thermal diffusivity in lithium chloride (LiCl), showing excellent agreement with literature data.
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Affiliation(s)
- Sean G Robertson
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Michael P Short
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Phenomenology, methods and experimental program for fluoride-salt-cooled, high-temperature reactors (FHRs). PROGRESS IN NUCLEAR ENERGY 2014. [DOI: 10.1016/j.pnucene.2014.04.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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