An example uncertainty and sensitivity analysis at the Horonobe site for performance assessment calculations.

Technical Report · Sun Aug 01 00:00:00 EDT 2004

DOI:https://doi.org/10.2172/919112· OSTI ID:919112

James, Scott Carlton

Given pre-existing Groundwater Modeling System (GMS) models of the Horonobe Underground Research Laboratory (URL) at both the regional and site scales, this work performs an example uncertainty analysis for performance assessment (PA) applications. After a general overview of uncertainty and sensitivity analysis techniques, the existing GMS sitescale model is converted to a PA model of the steady-state conditions expected after URL closure. This is done to examine the impact of uncertainty in site-specific data in conjunction with conceptual model uncertainty regarding the location of the Oomagari Fault. In addition, a quantitative analysis of the ratio of dispersive to advective forces, the F-ratio, is performed for stochastic realizations of each conceptual model. All analyses indicate that accurate characterization of the Oomagari Fault with respect to both location and hydraulic conductivity is critical to PA calculations. This work defines and outlines typical uncertainty and sensitivity analysis procedures and demonstrates them with example PA calculations relevant to the Horonobe URL.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 919112
• Report Number(s): SAND2004-3440; TRN: US0807326
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
58 GEOSCIENCES
HYDRAULIC CONDUCTIVITY
PERFORMANCE
SENSITIVITY ANALYSIS
STEADY-STATE CONDITIONS
GROUND WATER
RADIOACTIVE WASTE FACILITIES
UNDERGROUND DISPOSAL
JAPAN
DATA COVARIANCES
GEOLOGIC FAULTS
GEOLOGIC MODELS
Uncertainty-Analysis-Simulation methods.
Transport theory.
Underground facilities-Performance.
Underground facilities-Testing.