The searchlight problem for neutrons in a semi-infinite medium

Conference · Thu Apr 01 04:00:00 EST 1993

OSTI ID:10150093

Ganapol, B D ^[1]; Nigg, D W; Jahshan, S N; Wemple, C A ^[2]

---

1. Arizona Univ., Tucson, AZ (United States). Dept. of Nuclear and Energy Engineering
2. EG and G Idaho, Inc., Idaho Falls, ID (United States)

The solution of the Search Light Problem for monoenergetic neutrons in a semi-infinite medium with isotropic scattering illuminated at the free surface is obtained by several methods at various planes within the medium. The sources considered are a normally-incident pencil beam and an isotropic point source. The analytic solution is effected by a recently developed numerical inversion technique applied to the Fourier-Bessel transform. This transform inversion results from the solution method of Rybicki, where the two-dimensional problem is solved by casting it as a variant of a one-dimensional problem. The numerical inversion process results in a highly accurate solution. Comparisons of the analytic solution with results from Monte Carlo (MCNP) and discrete ordinates transport (DORT) codes show excellent agreement. These comparisons, which are free of any associated data or cross section set dependencies, provide significant evidence of the proper operation of both the transport codes tested.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 10150093
• Report Number(s): EGG-M--92469; CONF-930404--14; ON: DE93010796
• Country of Publication: United States
• Language: English

Related Subjects

663610
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
99 GENERAL AND MISCELLANEOUS
990200
BENCHMARKS
BOUNDARY CONDITIONS
FOURIER TRANSFORMATION
MATHEMATICS AND COMPUTERS
MONTE CARLO METHOD
NEUTRON PHYSICS
NEUTRON TRANSPORT THEORY
NUMERICAL SOLUTION
PERSONAL COMPUTERS