9 Matching Results

Search Results

Advanced search parameters have been applied.

in creator/contributor: "Kaplan, P."

open access

A formalism to generate probability distributions for performance-assessment modeling

A formalism is presented for generating probability distributions of parameters used in performance-assessment modeling. The formalism is used when data are either sparse or nonexistent. The appropriate distribution is a function of the known or estimated constraints and is chosen to maximize a quantity known as Shannon`s informational entropy. The formalism is applied to a parameter used in performance-assessment modeling. The functional form of the model that defines the parameter, data from … more

Date: December 31, 1990

Creator: Kaplan, P. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Pre-waste-emplacement ground-water travel time sensitivity and uncertainty analyses for Yucca Mountain, Nevada; Yucca Mountain Site Characterization Project

Yucca Mountain, Nevada is a potential site for a high-level radioactive-waste repository. Uncertainty and sensitivity analyses were performed to estimate critical factors in the performance of the site with respect to a criterion in terms of pre-waste-emplacement ground-water travel time. The degree of failure in the analytical model to meet the criterion is sensitive to the estimate of fracture porosity in the upper welded unit of the problem domain. Fracture porosity is derived from a number … more

Date: January 1, 1993

Creator: Kaplan, P. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Evaluation of soil characterization technologies using a stochastic, value-of-information approach

The US Department of Energy has initiated an integrated demonstration program to develop and compare new technologies for the characterization of uranium-contaminated soils. As part of this effort, a performance-assessment task was funded in February, 1993 to evaluate the field tested technologies. Performance assessment can be cleaned as the analysis that evaluates a system`s, or technology`s, ability to meet the criteria specified for performance. Four new technologies were field tested at th… more

Date: November 1, 1993

Creator: Kaplan, P. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Uncertainty and sensitivity results for pre-waste-emplacement groundwater travel time

Uncertainty and sensitivity analyses for pre-waste-emplacement groundwater travel time were conducted. Although preliminary, a number of interesting results were obtained. Uncertainty in the groundwater travel time statistics, as measured by the coefficient of variation, increases and then decreases as the modeled system transitions from matrix-dominated to fracture-dominated flow. The uncertainty analysis also suggests that the median, as opposed to the mean, may be a better indicator of perfo… more

Date: December 13, 1991

Creator: Kaplan, P. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Spent Fuel Reprocessing: More Value for Money Spent in a Geological Repository?

Today, each utility or country operating nuclear power plants can select between two long-term spent fuel management policies: either, spent fuel is considered as waste to dispose of through direct disposal or, spent fuel is considered a resource of valuable material through reprocessing-recycling. Reading and listening to what is said in the nuclear community, we understand that most people consider that the choice of policy is, actually, a choice among two technical paths to handle spent fuel… more

Date: February 25, 2003

Creator: Kaplan, P.; Vinoche, R.; Devezeaux, J-G. & Bailly, F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Data Rich, Information Poor

Surviving in a data-rich environment means understanding the difference between data and information. This paper reviews an environmental case study that illustrates that understanding and shows its importance. In this study, a decision problem was stated in terms of au economic-objective fimction. The function contains a term that defines the stochastic relationship between the decision and the information obtained during field chamctetition for an environmental contaminant. Data is defied as … more

Date: November 9, 1998

Creator: Kaplan, P. G. & Rautman, C. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Probabilistic comparison of alternative characterization technologies at the Fernald Uranium-in-Soils Integrated Demonstration Project

The performance of four alternative characterization technologies proposed for use in characterization of surficial uranium contamination in soil at the Incinerator and Drum Baling Areas at the Fernald Environmental Management Project in southwestern Ohio has been evaluated using a probabilistic, risk-based decision-analysis methodology. The basis of comparison is to minimize a computed total cost for environmental cleanup. This total-cost-based approach provides a framework for evaluating the … more

Date: December 31, 1993

Creator: Rautman, C. A.; McGraw, M. A.; Istok, J. D.; Sigda, J. M. & Kaplan, P. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Probability mapping of contaminants

Exhaustive characterization of a contaminated site is a physical and practical impossibility. Descriptions of the nature, extent, and level of contamination, as well as decisions regarding proposed remediation activities, must be made in a state of uncertainty based upon limited physical sampling. The probability mapping approach illustrated in this paper appears to offer site operators a reasonable, quantitative methodology for many environmental remediation decisions and allows evaluation of … more

Date: April 1, 1994

Creator: Rautman, C. A.; Kaplan, P. G.; McGraw, M. A.; Istok, J. D. & Sigda, J. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

TSPA 1991: An initial total-system performance assessment for Yucca Mountain; Yucca Mountain Site Characterization Project

This report describes an assessment of the long-term performance of a repository system that contains deeply buried highly radioactive waste; the system is assumed to be located at the potential site at Yucca Mountain, Nevada. The study includes an identification of features, events, and processes that might affect the potential repository, a construction of scenarios based on this identification, a selection of models describing these scenarios (including abstraction of appropriate models from… more

Date: July 1, 1992

Creator: Barnard, R. W.; Wilson, M. L.; Dockery, H. A.; Kaplan, P. G.; Eaton, R. R.; Bingham, F. W. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department