RETADD-II: a long-range atmospheric trajectory model with consistent treatment of deposition loss and species growth and decay

Technical Report · Wed Aug 01 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/6608361· OSTI ID:6608361

Murphy, B D; Ohr, S Y; Begovich, C L

A versatile model is described which estimates long-range atmospheric dispersion based on plume trajectories. This model allows the treatment of the dispersal from a source at an arbitrary height while taking account of plume depletion by dry and wet deposition together with the decay of material to successor species. The plume depletion, decay and growth equations are solved in an efficient manner which can accommodate up to eight pollutants (i.e., a parent and seven serial decay products). The code is particularly suitable for applications involving radioactive chain decay or for cases involving chemical species with successor decay products. Arbitrary emission rates can be specified for the members of the chain or, as is commonly the case, a sole emission rate can be specified for the first member. The code uses readily available upper-air wind data for the North American continent and it is therefore intended for the estimation of regional or continental scale dispersion patterns. This code is one of a group of codes, the Computerized Radiological Risk Investigation System (Baes and Miller, 1981), designed to simulate the transport of radionuclides through environmental pathways. 24 references, 5 figures.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6608361
• Report Number(s): ORNL/CSD-99; ON: DE84016551
• Country of Publication: United States
• Language: English

Related Subjects

500300* -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
COMPUTER CODES
DEPOSITION
DIFFUSION
EARTH ATMOSPHERE
ENVIRONMENTAL TRANSPORT
LONG-RANGE TRANSPORT
MASS TRANSFER
MATHEMATICAL MODELS
PLUMES
PRECIPITATION SCAVENGING
R CODES
RADIONUCLIDE MIGRATION
SEPARATION PROCESSES
WASHOUT