CASCADER: An m-chain gas-phase radionuclide transport and fate model. [CASCADER Model]
Chemicals and radionuclides move either in the gas-phase, liquid-phase, or both phases in soils. They may be acted upon by either biological or abiotic processes as they are advected and/or dispersed. Furthermore, parent and daughter radionuclides may decay as they are transported in the soil. CASCADER is a gas-phase, one space dimensional transport and fate model for an m-chain of radionuclides in very dry soil. This model contains barometric pressure-induced advection and diffusion together with linear irreversible and linear reversible sorption for each radionuclide. The advocation velocity is derived from an embedded air-pumping submodel. The airpumping submodel is based on an assumption of isothermal conditions and is barometric pressure driven. CASCADER allows the concentration of source radionuclides to decay via the classical Bateman chain of simple, first-order kinetic processes. The transported radionuclides also decay via first-order processes while in the soil. A mass conserving, flux-type inlet and exit set of boundary conditions is used. The user must supply the initial distribution for the parent radionuclide in the soil. The initial daughter distribution is found using equilibrium rules. The model is user friendly as it uses a prompt-driven, free-form input. The code is ANSI standard Fortran 77.
- Research Organization:
- Reynolds Electrical and Engineering Co., Inc., Las Vegas, NV (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC08-89NV10630
- OSTI ID:
- 7014706
- Report Number(s):
- DOE/NV/10630-23; ON: DE93001390; TRN: 92-038210
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
MATHEMATICAL MODELS
RADIONUCLIDE MIGRATION
SOILS
BISMUTH 214
LEAD 214
NEVADA TEST SITE
POLONIUM 218
RADON 222
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BISMUTH ISOTOPES
DAYS LIVING RADIOISOTOPES
ENVIRONMENTAL TRANSPORT
EVEN-EVEN NUCLEI
HEAVY NUCLEI
ISOTOPES
LEAD ISOTOPES
MASS TRANSFER
MINUTES LIVING RADIOISOTOPES
NATIONAL ORGANIZATIONS
NUCLEI
ODD-ODD NUCLEI
POLONIUM ISOTOPES
RADIOISOTOPES
RADON ISOTOPES
US DOE
US ORGANIZATIONS
540230* - Environment
Terrestrial- Radioactive Materials Monitoring & Transport- (1990-)
990200 - Mathematics & Computers