Heterogeneous Reactor Calculation Methods: Quarterly Progress Report No. 4 for January 1, 1960 to March 31, 1960

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

DOI:https://doi.org/10.2172/4120232· OSTI ID:4120232

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

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

Progress is indicated in three areas of heterogeneous reactor calculations: (1) multiple fission and absorption resonance effects; (2) a critical appraisal of the heterogeneous parameters and a better physical understanding of their values: and (3) the acquisition of HERESY-1 calculating experience on D₂O lattices. The general plan of HERESY-2 is described. A start was made on the assembly and use of epithermal fission resonance data in the form of heterogeneous parameters. A discussion of the multiple resonance treatment and related topics is given. A critical analysis of the assumptions of the heterogeneous method was made, in connection with the evaluation of the parameters gamma (thermal absorption) and A (single equivalent resonance absorption) that are used in HERESY-1. The problems of infinite complex lattices, the approach to criticality of a square lattice, and the analysis of spiked cores in D₂O were examined. A series of HERESY-1 calculations was carried out to examine the difference between square and hexagonal graphite- moderated lattice configurations. (For preceding period see NYO-2675.)

• Research Organization: TRG, Inc., Syosset, NY (United States)
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• NSA Number: NSA-15-007008
• OSTI ID: 4120232
• Report Number(s): NYO--2676; TRG--129-QTR-4
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
ABSORPTION
CRITICALITY
EPITHERMAL NEUTRONS
FINNED TUBES
FINS
FISSION
GRAPHITE MODERATOR
HEAVY WATER
LATTICES
MATHEMATICS
REACTOR CORE
REACTOR TECHNOLOGY
REACTORS
RESONANCE NEUTRONS
THERMAL NEUTRONS
TUBES