Incorporation of an explosive cloud rise code into ARAC's (Atmospheric Release Advisory Capability) ADPIC transport and diffusion model

Technical Report · Sun Apr 01 04:00:00 EDT 1990

DOI:https://doi.org/10.2172/6873253· OSTI ID:6873253

Foster, K T; Freis, R P ^[1]; Nasstrom, J S ^[2]

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1. Lawrence Livermore National Lab., CA (USA)
2. EG and G Energy Measurements, Inc., Pleasanton, CA (USA)

The US Department of Energy's Atmospheric Release Advisory Capability (ARAC) supports various government agencies by modeling the transport and diffusion of radiological material released into the atmosphere. ARAC provides this support principally in the form of computer-generated isopleths of radionuclide concentrations. In order to supply these concentration estimates in a timely manner, a suite of operational computer models is maintained by the ARAC staff. One primary tools used by ARAC is the ADPIC transport and diffusion computer model. This three-dimensional, particle-in-cell code simulates the release of a pollutant into the atmosphere, by injecting marker particles into a gridded, mass-consistent modeled wind field. The particles are then moved through the gridded domain by applying the appropriate advection, diffusion, and gravitational fall velocities. A cloud rise module has been incorporated into ARAC's ADPIC dispersion model to allow better simulation of particle distribution early after an explosive release of source material. The module is based on the conservation equations of mass, momentum, and energy, which are solved for the cloud radius, height, temperature, and velocity as a function of time. 6 refs., 5 figs., 2 tabs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6873253
• Report Number(s): UCRL-ID-103443; ON: DE90012995
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540130* -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (1990-)
AEROSOLS
ALGORITHMS
CLOUDS
COLLOIDS
COMPUTER CODES
COMPUTERIZED SIMULATION
DIFFUSION
DISPERSIONS
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
EMISSION
ENVIRONMENTAL TRANSPORT
EXPLOSIONS
MASS TRANSFER
MATERIALS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
NUCLEAR EXPLOSIONS
PARTICLE SIZE
RADIOACTIVE AEROSOLS
RADIOACTIVE CLOUDS
RADIOACTIVE MATERIALS
RADIOECOLOGICAL CONCENTRATION
RADIONUCLIDE MIGRATION
SIMULATION
SIZE
SOLS
TRANSPORT