Accession Number:

ADA231425

Title:

Modifications to MCNP, Version 3B: Incorporating a Variable Density Atmosphere. Addendum

Descriptive Note:

Technical rept.

Corporate Author:

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

Personal Author(s):

Report Date:

1991-03-01

Pagination or Media Count:

75.0

Abstract:

MCNP version 3B was modified to incorporate a continuously variable density atmosphere. This was accomplished by representing the variation of air density as a function of altitude with a series of continuous piecewise exponential curves up to a maximum altitude of 1000 km. User-written subroutines and functions were written which incorporated these piecewise functions. These subroutines and functions were subsequently incorporated into a production version of MCNP. Several MCNP subroutines and files were modified in support of these modifications. This report discusses detailed information regarding the theoretical development of the variable density model, the user written subroutines and functions, the modifications to MCNP subroutines and files, and other relevant information.

Subject Categories:

  • Atmospheric Physics
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE