Accession Number:

AD0779941

Title:

The Effect of an Air/Ground Interface on Fluence from a Plane Source of Neutrons in Homogeneous Air.

Descriptive Note:

Master's thesis,

Corporate Author:

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

Personal Author(s):

Report Date:

1974-03-01

Pagination or Media Count:

69.0

Abstract:

A numerical approximation of the multigroup diffusion equation was used to evaluate fluence from a plane source of neutrons in a homogeneous air environment with an airground interface. Data from the airground model were compared with data from an infinite homogeneous air model to determine the effect of the airground interface on the total neutron fluence in the air. This simple model indicates that the ground acts as a neutron sink for all 22 neutron energy groups studied. Based on this result, a set of modifications to the AFIT Nuclear Survivability Code was recommended to extend the useful range of that code below seven km. Author

Subject Categories:

  • Radioactivity, Radioactive Wastes and Fission Products
  • Nuclear Weapons
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE