Method of baffle/reflector region homogenization

Conference · Wed Jan 01 04:00:00 EST 1986 · Trans. Am. Nucl. Soc.; (United States)

OSTI ID:6907808

Rathkopf, J A; Liu, Y S

Albedo boundary conditions are commonly used in coarse-mesh nodal codes as a substitute for the baffle and reflector, thereby reducing the size of the problem and the corresponding computational expense. Analytical expressions for one-dimensional albedos are easily obtained, but, in the case of two-dimensions, more complicated models are used with limited success. The Westinghouse Advanced Nodal Code (ANC) allows representation of the baffle and reflector region by homogeneous nodes beyond the fuel assemblies. This summary describes a procedure developed to obtain baffle/reflector constants that will reproduce the results of fine-mesh diffusion theory analysis of cores with explicitly modeled baffles and reflectors. The method does not attempt to reproduce transport effects - the emphasis of other recent work. These homogenized baffle/reflector constants, which incorporate the discontinuity factor of Koebke's equivalence theory of homogenization, have been applied to nodal calculations with great success.

• OSTI ID: 6907808
• Report Number(s): CONF-861102-
• Conference Information: Journal Name: Trans. Am. Nucl. Soc.; (United States) Journal Volume: 53
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
A CODES
ALBEDO
CALCULATION METHODS
COMPUTER CODES
CROSS SECTIONS
FUEL ASSEMBLIES
HOMOGENIZATION METHODS
KINETICS
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR CORES
REACTOR KINETICS
REACTORS
REFLECTION
WATER COOLED REACTORS
WATER MODERATED REACTORS
WESTINGHOUSE STANDARD REACTOR