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

James, Scott Carlton

Sandia National Laboratories

关键词: Steady-State Conditions;    Radioactive Waste Facilities;    Sensitivity Analysis;    Ground Water;    58 Geosciences;   

DOI  :  10.2172/919112
RP-ID  :  SAND2004-3440
RP-ID  :  AC04-94AL85000
RP-ID  :  919112

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.