Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6762291 | Nuclear Engineering and Design | 2014 | 7 Pages |
Abstract
In this paper, a preliminary board type radial fuel shuffling sodium cooled breed and burn reactor core is designed. In the current design, a number of breeding subassemblies are arranged in the center core to ensure enough breeding. A self-developed MCNP-ORIGEN coupled system with the ENDF/B-VI data library is applied to perform neutronics and burn-up calculations. For a 2.0Â m radius and 2.5Â m height core, the results demonstrate the feasibility of the board type radial fuel shuffling strategy. Breeding mainly occurs in the breeding subassemblies during the first 6 fuel cycles as they are moved to the burning/breeding region. The core will become asymptotically stable after about 24 years. The discharged burn-up of most subassemblies is about 15.0-30.0%. The influences of the core size on the major core parameters, such as initial keff, steady keff, maximum power density, peak burn-up and burn-up ratio between breeding and ignition subassemblies are calculated and investigated. The results indicate that the initial keff increases with fuel height and core radius and finally reaches stability; the steady keff increases with fuel height and core radius, then reaches peak value and finally decreases; the maximum power density, the peak burn-up and the burn-up ratio between breeding and ignition subassemblies decrease with the increase of fuel height and core radius; if core radius is less than 1.875Â m, they increase sharply with the decrease of core radius.
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Authors
Meiyin Zheng, Wenxi Tian, Xiao Chu, Dalin Zhang, Suizheng Qiu, Guanghui Su,