A Computer Fallout Model for Operational Type Studies.

Abstract

This study describes a method of calculating g(t), the rate of deposition on the ground of radioactivity from the stabilized cloud resulting from a nuclear ground burst. Particle fall dynamics are described by the method of Davies as formalized into a computational algorithm by McDonald. The radius of particle arriving on the ground at any time from a given altitude, and the rate of change of this radius with time are described by polynomials in 1/t. A table of coefficients of these polynomials from 200 meters t 50 km above sea level is provided. It was found that a pancake (zero-thickness) cloud is an excellent approximation to a vertically-distributed cloud with finite extent. This, and the closed form of the calculation, make for a relatively simple and straightforward algorithm, one in fact that approaches the ease of a hand calculation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1980
Accession Number
ADA083755

Entities

People

  • Richard F. Colarco

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Cyber
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Algorithms
  • Altitude
  • Coefficients
  • Computers
  • Dose Rate
  • Equations
  • Metal Matrix Composites
  • Nuclear Fallout
  • Particle Size
  • Particles
  • Plastic Explosives
  • Radioactivity
  • Sea Level
  • Thickness
  • Wind Shear
  • Wind Velocity

Readers

  • Calculus or Mathematical Analysis
  • Nuclear Civil Defense.
  • Solar Physics