Extension of analytic function expansion nodal method to multigroup problems in hexagonal-z geometry

Journal Article · Thu May 01 00:00:00 EDT 1997 · Nuclear Science and Engineering

OSTI ID:509300

Cho, N Z; Kim, Y H; Park, K W ^[1]

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1. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Nuclear Engineering

The analytic function expansion nodal (AFEN) method has been successfully applied to two-group neutron diffusion problems. However, the current AFEN method cannot treat complex eigenmodes, which appear in the general multigroup equations. The AFEN method is extended such that complex eigenmodes are treated within the framework of the original AFEN method for any type of geometry. Also, a suite of new nodal codes based on the extended AFEN theory is developed for hexagonal-z geometry and applied to several benchmark problems. Numerical results obtained attest to their accuracy and applicability to practical problems.

• OSTI ID: 509300
• Journal Information: Nuclear Science and Engineering, Vol. 126, Issue 1; Other Information: PBD: May 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
MULTIGROUP THEORY
NODAL EXPANSION METHOD
NEUTRON DIFFUSION EQUATION
HEXAGONAL CONFIGURATION
ALGORITHMS