Proceedings of the Korean Nuclear Society Conference (한국원자력학회:학술대회논문집)

Korean Nuclear Society (한국원자력학회)
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Axial BP Zoning for the Soluble Boron Free Operation in Medium-Sized PWR

  • Kim, Jong-Chae (Department of Nuclear Engineering, Kyung Hee University) ;
  • Kim, Myung-Hyun (Department of Nuclear Engineering, Kyung Hee University)
  • Published : 1996.11.01
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Abstract

Feasibility of soluble boron free operation for the medium-sized commercial reactors was investigated. Westinghouse advanced reactor, AP-600 was chosen as a design prototype. Design modification was applied for the assembly design with gadolinia burnable poison-high Gd enrichment and axial poison zoning. CASMO and NECTA-C code system checked axial offset and peaking factors as fuels burned up. A core with complex axial burnable poison zoning satisfied design goals - small excess reactivity for 18 month cycle. Therefore, critical bank positioning for three control rod banks was sought with ease. A.O. value and Fq value were kept within the safety limit.

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