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- W4210367908 abstract "A new conceptual design of a mega-power nuclear reactor (MPNR) for applications in deep-sea exploration was developed. A solid core cooled by the natural circulation of a lead-bismuth eutectic (LBE) reactor was designed with a thermal power of 1 MW. It consists of 126 coolant channels, which are holes surrounded by highly enriched fuel of UO2 dispersed in titanium-zirconium-molybdenum (TZM) alloy. A control rod at the center of the fuel and six control drums around the block are made of boron carbide to control the reactivity of the reactor. The core and heat exchangers are arranged horizontally to reduce the volume of the entire system. Compared with traditional deep-submersible reactors used at sea, the MPNR is highly compact, has a high-power output and simple structure, and ensures safety under ocean conditions. The neutronic and thermal-hydraulic design characteristics of the MPNR were calculated and assessed. The temperature reactivity and void fraction reactivity coefficients of the MPNR are negative values to ensure that the reactor has negative feedback characteristics. The thermal-hydraulic analysis of the MPNR design was carried out using the computational fluid dynamics program STAR-CCM+, in which field functions were added to the program to realize the inclined, rolling, and heaving motions of the reactor. The numerical simulations showed that under stationary conditions, the MPNR could establish natural circulation with a mass flow rate of 93.32 kg/s. At an inclination angle of ±30°, the natural circulation mass flow rates are 88.6 kg/s and 87.5 kg/s, respectively. Under rolling and heaving conditions, the mass flow rate fluctuated periodically, and the maximum temperature of the core changed within 10 K." @default.
- W4210367908 created "2022-02-08" @default.
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- W4210367908 date "2022-03-01" @default.
- W4210367908 modified "2023-10-16" @default.
- W4210367908 title "Conceptual design and thermal-hydraulic analysis of a megawatt-level lead-bismuth cooling reactor for deep-sea exploration" @default.
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- W4210367908 doi "https://doi.org/10.1016/j.pnucene.2022.104125" @default.
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