NUCLEAR CRITICALITY CALCULATIONS ON A SPHERICALLY SYMMETRIC GASEOUS-CORE REACTOR.

Abstract

The nuclear criticality calculations are performed on a two-region, spherically symmetric gaseous-core reactor. The core is fueled with U235 vapor and is externally moderated by various thicknesses of graphite at 4000K. A one-group (thermal) transport analysis with a fast effect correction, which accounts for above-thermal fissions and absorptions, is used to perform the criticality calculations. The thermal-group analysis is developed by applying the Sn transport approximation to the one-velocity, onedimensional, time-independent Boltzmann transport equation. Age-diffusion theory is used to estimate the fast effect correction. The criticality calculations are done on the IBM 7090 digital computer, and results are compared with results from a multi-group transport analysis for similar reactor configurations.

Document Details

Document Type
Technical Report
Publication Date
May 01, 1964
Accession Number
AD0603614

Entities

People

  • John R. Rec

Organizations

  • Air Force Institute of Technology

Tags

DTIC Thesaurus Topics

  • Absorption
  • Boltzmann Equation
  • Computers
  • Diffusion
  • Diffusion Theory
  • Digital Computers
  • Equations
  • Graphitic Materials
  • Mathematics
  • Thickness
  • Transport Ships

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Solar Physics
  • Thermal Physics or Thermal Science.