Heterogeneous Reactor Calculation Methods: Quarterly Progress Report No. 5, April 1-June 30, 1960

Technical Report · Tue Oct 31 00:00:00 EST 1961

DOI:https://doi.org/10.2172/4022449· OSTI ID:4022449

Klahr, Carl N. ^[1]; Mendelsohn, Lawrence B. ^[1]

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1. TRG, Inc., Syosset, NY (United States)

Considerations pertaining to the effect of the finite size of the fuel elements-large source theory-on the kennels used in heterogeneous calculations are explored. The use of kernels going from the spatially distributed sources in one fuel element to spatially distributed sinks within another fuel element permits one to consider complex fuel elements with detailed interior structure. Self-effects of the fuel elements are calculated for some simple geometries. The effect of rod interactions on the kernels is considered and a simple homogenization recipe is given to take such interactions into account to first order. A comparison is made between heterogeneous calculations and experiments on critical configurations in a graphite lattice. The calculated reactivities agree with the experimental values to the extent expected. Heterogeneous calculations of control-rod configurations in a graphite lattice are presented. The results indicate that both in reactivity and in power distortion, control-rod effects are quite sensitive to the control-rod pattern. Calculations on spiking effects are given.

• Research Organization: TRG, Inc., Syosset, NY (United States)
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• DOE Contract Number: AT(30-1)-2375
• OSTI ID: 4022449
• Report Number(s): NYO--2677
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
22 GENERAL STUDIES OF NUCLEAR REACTORS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CONFIGURATION
CONTROL ELEMENTS
CRITICALITY
FUEL ELEMENTS
GRAPHITE
MATHEMATICS
NEUTRON FLUX
REACTIVITY
REACTOR TECHNOLOGY
REACTORS