Documentation and Analysis of the WSEG-10 Fallout Prediction Model.
Abstract
The purpose of this independent study is to recreate and document the most popular analytical fallout model in use over the past twenty years, WSEG-10. Local access to WSEG-10 at the Air Force Institute of Technology, School of Engineering, will provide a basis for future fallout studies. As such, this study provides a fully documented Fortran computer code containing the most recent version of the WSEG-10 analytical model with sample output. To further understand this computer code, a general discussion of the WSEG-10 fallout model and analysis of crossrange dispersion (sigma (y)) and activity conservation is included. Results of the analysis of sigma(y) demonstrate that diffusive growth is not accounted for in the model and that crosswind shear is the dominant, long term effect. In a comparative conservation analysis, the WSEG model in use today does not conserve activity due to the unnormalized character of the crossrange transport function. This effect is substantial at yields less than .1 MT. Activity not conserved varied between 31.4% at 1 KT and a wind of 60 st. mi. Also included is a further discussion of model limitations or inconsistencies discovered either through computer use during this independent study or during initial literature search.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1980
- Accession Number
- ADA083515
Entities
People
- Dan W. Hanifen
Organizations
- Air Force Institute of Technology