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Title: NRC model simulations in support of the hydrologic code intercomparison study (HYDROCOIN): Level 1-code verification

Abstract

HYDROCOIN is an international study for examining ground-water flow modeling strategies and their influence on safety assessments of geologic repositories for nuclear waste. This report summarizes only the combined NRC project temas' simulation efforts on the computer code bench-marking problems. The codes used to simulate thesee seven problems were SWIFT II, FEMWATER, UNSAT2M USGS-3D, AND TOUGH. In general, linear problems involving scalars such as hydraulic head were accurately simulated by both finite-difference and finite-element solution algorithms. Both types of codes produced accurate results even for complex geometrics such as intersecting fractures. Difficulties were encountered in solving problems that invovled nonlinear effects such as density-driven flow and unsaturated flow. In order to fully evaluate the accuracy of these codes, post-processing of results using paricle tracking algorithms and calculating fluxes were examined. This proved very valuable by uncovering disagreements among code results even through the hydraulic-head solutions had been in agreement. 9 refs., 111 figs., 6 tabs.

Publication Date:
Research Org.:
Nuclear Regulatory Commission, Washington, DC (USA). Div. of Engineering
OSTI Identifier:
5267773
Report Number(s):
NUREG-1249-Vol.1
ON: TI88900619
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; RADIOACTIVE WASTE DISPOSAL; RADIONUCLIDE MIGRATION; F CODES; FLOW MODELS; S CODES; T CODES; U CODES; BENCHMARKS; COMPUTERIZED SIMULATION; FINITE DIFFERENCE METHOD; FINITE ELEMENT METHOD; GROUND WATER; HYDROLOGY; INTERNATIONAL COOPERATION; THREE-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL CALCULATIONS; US NRC; COMPUTER CODES; COOPERATION; ENVIRONMENTAL TRANSPORT; HYDROGEN COMPOUNDS; ITERATIVE METHODS; MANAGEMENT; MASS TRANSFER; MATHEMATICAL MODELS; NATIONAL ORGANIZATIONS; NUMERICAL SOLUTION; OXYGEN COMPOUNDS; SIMULATION; US ORGANIZATIONS; WASTE DISPOSAL; WASTE MANAGEMENT; WATER; 052002* - Nuclear Fuels- Waste Disposal & Storage; 510300 - Environment, Terrestrial- Radioactive Materials Monitoring & Transport- (-1989); 990220 - Computers, Computerized Models, & Computer Programs- (1987-1989)

Citation Formats

. NRC model simulations in support of the hydrologic code intercomparison study (HYDROCOIN): Level 1-code verification. United States: N. p., 1988. Web.
. NRC model simulations in support of the hydrologic code intercomparison study (HYDROCOIN): Level 1-code verification. United States.
. 1988. "NRC model simulations in support of the hydrologic code intercomparison study (HYDROCOIN): Level 1-code verification". United States.
@article{osti_5267773,
title = {NRC model simulations in support of the hydrologic code intercomparison study (HYDROCOIN): Level 1-code verification},
author = {},
abstractNote = {HYDROCOIN is an international study for examining ground-water flow modeling strategies and their influence on safety assessments of geologic repositories for nuclear waste. This report summarizes only the combined NRC project temas' simulation efforts on the computer code bench-marking problems. The codes used to simulate thesee seven problems were SWIFT II, FEMWATER, UNSAT2M USGS-3D, AND TOUGH. In general, linear problems involving scalars such as hydraulic head were accurately simulated by both finite-difference and finite-element solution algorithms. Both types of codes produced accurate results even for complex geometrics such as intersecting fractures. Difficulties were encountered in solving problems that invovled nonlinear effects such as density-driven flow and unsaturated flow. In order to fully evaluate the accuracy of these codes, post-processing of results using paricle tracking algorithms and calculating fluxes were examined. This proved very valuable by uncovering disagreements among code results even through the hydraulic-head solutions had been in agreement. 9 refs., 111 figs., 6 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/5267773}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 1988},
month = {Tue Mar 01 00:00:00 EST 1988}
}

Technical Report:
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