The Rod Control Cluster Assembly (RCCA) ejection accident is a Condition IV design basis reactivity insertion event for Pressurized Water Reactors (PWR). The event is historically analyzed using a one-dimensional (1D) neutron kinetic code to meet the current licensing criteria for fuel rod burnup to 62,000 MWD/MTU. The Westinghouse USNRC-approved three-dimensional (3D) analysis methodology is based on the neutron kinetics version of the ANC code (SPNOVA) coupled with Westinghouse’s version of the EPRI core thermal-hydraulic code VIPRE-01. The 3D methodology provides a more realistic yet conservative analysis approach to meet anticipated reduction in the licensing fuel enthalpy rise limit for high burnup fuel. A rod ejection analysis using the 3D methodology was recently performed for a Westinghouse 3-loop PWR at an uprated core power of 3151 MWt with reload cores that allow large flexibility in assembly shuffling and a fuel hot rod burnup to 75,000 MWD/MTU. The analysis considered high enrichment fuel assemblies at the control rod locations as well as bounding rodded depletions in the end of life, zero power and full power conditions. The analysis results demonstrated that the peak fuel enthalpy rise is less than 100 cal/g for the transient initiated at the hot zero power condition. The maximum fuel enthalpy is less than 200 cal/g for the transient initiated from the full power condition.
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14th International Conference on Nuclear Engineering
July 17–20, 2006
Miami, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4245-2
PROCEEDINGS PAPER
Three Dimensional Analysis of 3-Loop PWR RCCA Ejection Accident for High Burnup
Cristian Marciulescu,
Cristian Marciulescu
Westinghouse Electric Company, Pittsburgh, PA
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Yixing Sung,
Yixing Sung
Westinghouse Electric Company, Pittsburgh, PA
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Charles L. Beard
Charles L. Beard
Westinghouse Electric Company, Pittsburgh, PA
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Cristian Marciulescu
Westinghouse Electric Company, Pittsburgh, PA
Yixing Sung
Westinghouse Electric Company, Pittsburgh, PA
Charles L. Beard
Westinghouse Electric Company, Pittsburgh, PA
Paper No:
ICONE14-89552, pp. 303-308; 6 pages
Published Online:
September 17, 2008
Citation
Marciulescu, C, Sung, Y, & Beard, CL. "Three Dimensional Analysis of 3-Loop PWR RCCA Ejection Accident for High Burnup." Proceedings of the 14th International Conference on Nuclear Engineering. Volume 4: Computational Fluid Dynamics, Neutronics Methods and Coupled Codes; Student Paper Competition. Miami, Florida, USA. July 17–20, 2006. pp. 303-308. ASME. https://doi.org/10.1115/ICONE14-89552
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