An example uncertainty and sensitivity analysis at the Horonobe site for performance assessment calculations.
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
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 919112
- Report Number(s):
- SAND2004-3440
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
DATA COVARIANCES
GEOLOGIC FAULTS
GEOLOGIC MODELS
GROUND WATER
HYDRAULIC CONDUCTIVITY
JAPAN
PERFORMANCE
RADIOACTIVE WASTE FACILITIES
SENSITIVITY ANALYSIS
STEADY-STATE CONDITIONS
Transport theory.
UNDERGROUND DISPOSAL
Uncertainty-Analysis-Simulation methods.
Underground facilities-Performance.
Underground facilities-Testing.