DIFFUSION ANISOTROPY IN SINGLY- AND DOUBLY-PERIODIC LATTICES

Journal Article · Thu Nov 01 04:00:00 EST 1962 · Nuclear Science and Engineering (U.S.)

OSTI ID:4755944

Beeler, J R

ABS>Monte Carlo computational experiments were used to study the diffusion anisotropy of fast and slow neutrons in singly- and doubly-periodic, two-region reactor lattices. In two-region systems, it is shown that the separation of the anisotropy factor into a part representing mean free path discontinuity and a part representing absorption probability discontinuity is physically meaningful. In the singlyperiodic lattice, the anisotropy factor for fast neutrons was greater than unity, while that for slow neutrons was less than unity. It is possible, however, for the slow neutron anisotropy factor to exceed unity in doubly-periodic lattices. The anisotropy extreme, in the singly- periodic lattice, occurred when the albedo of the moderator slab was equal to that of the fuel slab. (auth)

• Research Organization: General Electric Co., Cincinnati
• NSA Number: NSA-17-005311
• OSTI ID: 4755944
• Journal Information: Nuclear Science and Engineering (U.S.), Journal Name: Nuclear Science and Engineering (U.S.) Vol. Vol: 14; ISSN NSENA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANISOTROPY
PHYSICS
PROBABILITY