Radionuclide migration through fractured rock: Effects of multiple fractures and two-member decay chains
This report presents the results of an analytical study of the hydrological transport of a radioactive contaminant through fractured, porous rock. The purpose is to evaluate the time-, and space-dependent concentration of the contaminant in the ground-water in the fractures and in the rock pores. We propose a simplified analytical method that superposes two single-fracture solutions for the concentration in the rock matrix with a system of parallel fractures. The exact solutions require multiple integrals and summation of an infinite series, which converges slowly because of its oscillating nature. The convergence of the series becomes slower for strongly-sorbing media, large spacing of two fractures, and early times. In summary, we made extension to the theory of radionuclide penetration into multiply fractured rock, and provided solutions for a two-member decay chain. 9 refs., 10 figs., 1 tab.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5752198
- Report Number(s):
- LBL-21121; ON: DE88004884
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analytic solution of pseudocolloid migration in fractured rock
Radionuclide dispersion from multiple patch sources into a rock fracture
Related Subjects
053000 -- Nuclear Fuels-- Environmental Aspects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
510300 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
CONTAMINATION
DAUGHTER PRODUCTS
DISPERSIONS
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
FORECASTING
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
HYDROGEN COMPOUNDS
HYDROLOGY
ISOTOPES
MANAGEMENT
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOECOLOGICAL CONCENTRATION
RADIONUCLIDE MIGRATION
SORPTIVE PROPERTIES
SPACE DEPENDENCE
SURFACE PROPERTIES
TIME DEPENDENCE
UNDERGROUND DISPOSAL
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WATER