Sensitivity analysis using computer calculus: A nuclear waste isolation application

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Nucl. Sci. Eng.; (United States)

OSTI ID:7198375

Oblow, E M; Pin, F G; Wright, R Q

An automated procedure for performing large-scale sensitivity studies based on the use of computer calculus is presented. The procedure is embodied in a FORTRAN precompiler called GRESS, which automatically processes computer models adding derivative-taking capabilities to the normal calculated results. The theory and applicability of the GRESS codes are described and tested against a major geohydrological modeling problem. The SWENT nuclear waste repository modeling code is used as the basis for these studies. Results for a test problem involving groundwater flow in the vicinity of the Richton Salt Dome are discussed in detail. Sensitivity results are compared with analytical, perturbation, and alternate sensitivity approaches to the problem. Five-place accuracy in these sensitivity results is verified for all cases in which the effects of nonlinearities are made sufficiently small. Conclusions are drawn as to the applicability of GRESS in the problem studied and for more general large-scale modeling sensitivity studies.

• Research Organization: Oak Ridge National Lab., Engineering Physics and Mathematics Div. Oak Ridge, TN 37831
• OSTI ID: 7198375
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 94:1; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

052002* -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ANALYTICAL SOLUTION
COMPUTER CODES
COMPUTERIZED SIMULATION
FLOW MODELS
FORTRAN
G CODES
GEOLOGIC DEPOSITS
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
HYDROGEN COMPOUNDS
HYDROLOGY
MANAGEMENT
MATERIALS
MATHEMATICAL MODELS
NONLINEAR PROBLEMS
NUCLEAR FACILITIES
OXYGEN COMPOUNDS
PERTURBATION THEORY
PROGRAMMING LANGUAGES
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTES
S CODES
SALT DEPOSITS
SENSITIVITY ANALYSIS
SIMULATION
UNDERGROUND DISPOSAL
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WATER