High-Order Homogenization Method in Diffusion Theory for Reactor Core Simulation and Design Calculation

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Description

Most modern nodal methods in use by the reactor vendors and utilities are based on the generalized equivalence theory (GET) that uses homogenized cross sections and flux discontinuity factors. These homogenized parameters, referred to as infinite medium parameters, are precomputed by performing single bundle fine-mesh calculations with zero current boundary conditions. It is known that for configurations in which the node-to-node leakage (e.g., surface current-to-flux ratio) is large the use of the infinite medium parameters could lead to large errors in the nodal solution. This would be the case for highly heterogeneous core configurations, typical of modern reactor core designs.

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Rahnema, Farzad September 30, 2003.

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Description

Most modern nodal methods in use by the reactor vendors and utilities are based on the generalized equivalence theory (GET) that uses homogenized cross sections and flux discontinuity factors. These homogenized parameters, referred to as infinite medium parameters, are precomputed by performing single bundle fine-mesh calculations with zero current boundary conditions. It is known that for configurations in which the node-to-node leakage (e.g., surface current-to-flux ratio) is large the use of the infinite medium parameters could lead to large errors in the nodal solution. This would be the case for highly heterogeneous core configurations, typical of modern reactor core designs.

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INIS; OSTI as DE00816337

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  • Other Information: PBD: 30 Sep 2003

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  • Report No.: DOE/ID/13960
  • Grant Number: FG07-00ID13960
  • DOI: 10.2172/816337 | External Link
  • Office of Scientific & Technical Information Report Number: 816337
  • Archival Resource Key: ark:/67531/metadc733610

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  • September 30, 2003

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • Jan. 4, 2017, 1:49 p.m.

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Rahnema, Farzad. High-Order Homogenization Method in Diffusion Theory for Reactor Core Simulation and Design Calculation, report, September 30, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc733610/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.