The effect of a zero-concentration sink on contaminant transport and remedial-action designs for the Weldon Spring quarry, Weldon Spring, Missouri
One-dimensional analytical expressions are developed to simulate two processes in a homogeneous porous medium: contaminant transport through a porous medium that has a zero-concentration sink located at a finite distance from a step-function source; and contaminant transport through a porous medium that has an initial steady-state distribution corresponding to a constant strength source and zero-concentration sink separated by a finite distance. The governing equations are cast in dimensionless form, making use of the flow system's Peclet number. Evaluation of the analytical expressions is accomplished by numerical inversion of Laplace-space concentrations using either a full Fourier series approach with acceleration, or the Stehfest algorithm. The analytical expressions are used to evaluate possible contaminant conditions at the Weldon Spring quarry near Weldon Spring, Missouri. The following results have been found: contaminant concentrations should be at or near steady-state conditions; the spatial distribution of contaminants should be a function of the flow system's Peclet number; contaminant concentrations near the Femme Osage Slough should approach zero; contaminant concentrations near the quarry during dewatering and bulk-waste removal should monotonically decrease with time; and the spatial distribution of contaminants during remedial activities should be relatively flat, especially near the dewatering pumps. Future work will entail evaluating existing radionuclide or chemical concentration data to determine the applicability of the proposed contaminant transport model and to improve the hydrogeological conceptualization of the quarry area and vicinity. 20 refs., 27 figs.
- Research Organization:
- Argonne National Lab., IL (USA). Environmental Assessment and Information Sciences Div.
- Sponsoring Organization:
- DOE/NE
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6461572
- Report Number(s):
- ANL/EAIS/TM-31; ON: DE91002957
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
ENVIRONMENTAL TRANSPORT
MATHEMATICAL MODELS
POLLUTANTS
ECOLOGICAL CONCENTRATION
ONE-DIMENSIONAL CALCULATIONS
RADIOACTIVE MATERIALS
RADIOECOLOGICAL CONCENTRATION
SURPLUS NUCLEAR FACILITIES
REMEDIAL ACTION
CHEMICAL WASTES
CONTAMINATION
GROUND WATER
HYDROLOGY
LAPLACE TRANSFORMATION
MISSOURI
POROUS MATERIALS
RADIOACTIVE WASTES
RADIONUCLIDE MIGRATION
SOLUTES
SOURCE TERMS
SURFACE WATERS
WASTE MANAGEMENT
FEDERAL REGION VII
HYDROGEN COMPOUNDS
INTEGRAL TRANSFORMATIONS
MANAGEMENT
MASS TRANSFER
MATERIALS
NORTH AMERICA
NUCLEAR FACILITIES
OXYGEN COMPOUNDS
TRANSFORMATIONS
USA
WASTES
WATER
054000* - Nuclear Fuels- Health & Safety
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
540330 - Environment
Aquatic- Radioactive Materials Monitoring & Transport- (1990-)