Particle-in-cell vs straight-line airflow Gaussian calculations of concentration and deposition of airborne emissions out to 70 km for two sites of differing meteorological and topographical character
Two numerical models for the calculation of air concentration and ground deposition of airborne effluent releases are compared. The Particle-in-Cell (PIC) model and the Straight-Line Airflow Gaussian model were used for the simulation. Two sites were selected for comparison: the Hudson River Valley, New York, and the area around the Savannah River Plant, South Carolina. Input for the models was synthesized from meteorological data gathered in previous studies by various investigators. It was found that the PIC model more closely simulated the three-dimensional effects of the meteorology and topography. Overall, the Gaussian model calculated higher concentrations under stable conditions with better agreement between the two methods during neutral to unstable conditions. In addition, because of its consideration of exposure from the returning plume after flow reversal, the PIC model calculated air concentrations over larger areas than did the Gaussian model.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7330296
- Report Number(s):
- UCRL-52133; TRN: 77-006611
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
METEOROLOGY
RADIOACTIVE AEROSOLS
ENVIRONMENTAL TRANSPORT
TOPOGRAPHY
AEROSOLS
AIR POLLUTION
CHEMICAL EFFLUENTS
DEPOSITION
DISTRIBUTION
EARTH ATMOSPHERE
FORECASTING
GAUSS FUNCTION
HUDSON RIVER
MATHEMATICAL MODELS
NEW YORK
RADIATION DOSES
SAVANNAH RIVER PLANT
SIMULATION
TERRESTRIAL ECOSYSTEMS
THREE-DIMENSIONAL CALCULATIONS
COLLOIDS
DISPERSIONS
DOSES
ECOSYSTEMS
FUNCTIONS
MASS TRANSFER
MID-ATLANTIC REGION
NATIONAL ORGANIZATIONS
NORTH AMERICA
POLLUTION
RIVERS
SOLS
STREAMS
SURFACE WATERS
US AEC
US ERDA
US ORGANIZATIONS
USA
500300* - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)
053000 - Nuclear Fuels- Environmental Aspects
054000 - Nuclear Fuels- Health & Safety