Accession Number:

AD0857324

Title:

Monoenergetic Time-Dependent Neutron Transport from an Expanding Shell Source in the Atmosphere.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

• Fisk, James Walter

Report Date:

1969-06-01

Pagination or Media Count:

74.0

Abstract:

The one group time-dependent transport equation for neutrons in sea level atmosphere is solved numerically for an expanding shell source. Using spherical geometry and assuming azimuthal symmetry and isotropic scatter, the problem is formulated in terms of the x,y,t variables. Results have been calculated for a region of eight mean free paths in diameter yielding flux curves comparable to S sub n. The problem was programmed for the IBM-7094 computer using the Fortran IV language. The program includes a plotting routine for an off-line plotter. Author

Descriptors:

• (*NEUTRON TRANSPORT THEORY
• AIR)
• NEUTRON SCATTERING
• NEUTRON FLUX
• BOUNDARY VALUE PROBLEMS
• DIFFERENCE EQUATIONS
• NUMERICAL ANALYSIS
• COMPUTER PROGRAMS
• THESES

Subject Categories:

• Fission Reactor Physics
• Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE