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자료유형
학술저널
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저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제46권 제4호
발행연도
2014.1
수록면
513 - 520 (8page)

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In this paper, three types of operational and industrial absorbers used at research reactors, including Ag-In-Cd alloy, B4C,and Hf are selected for sensitivity analyses. Their integral effects on the main neutronic core parameters important to safetyissues are investigated. These parameters are core excess reactivity, shutdown margin, total reactivity worth of control rods,thermal neutron flux, power density distribution, and Power Peaking Factor (PPF). The IAEA 10 MW benchmark core isselected as the case study to verify calculations. A two-dimensional, three-group diffusion model is selected for core calculations. The well-known WIMS-D4 and CITATION reactor codes are used to carry out these calculations. It is found that thelargest shutdown margin is gained using the B4C; also the lowest PPF is gained using the Ag-In-Cd alloy. The maximumpoint power densities belong to the inside fuel regions surrounding the central flux trap (irradiation position), surrounded bycontrol fuel elements, and the peripheral fuel elements beside the graphite reflectors. The greatest and least fluctuation of thepoint power densities are gained by using B4C and Ag-In-Cd alloy, respectively.

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