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The Analytical Repository Source-Term (AREST) model: Description and documentation

Description: The geologic repository system consists of several components, one of which is the engineered barrier system. The engineered barrier system interfaces with natural barriers that constitute the setting of the repository. A model that simulates the releases from the engineered barrier system into the natural barriers of the geosphere, called a source-term model, is an important component of any model for assessing the overall performance of the geologic repository system. The Analytical Repositor… more
Date: October 1, 1987
Creator: Liebetrau, A. M.; Apted, M. J.; Engel, D. W.; Altenhofen, M. K.; Strachan, D. M.; Reid, C. R. et al.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Tank 241-AN-106 characterization and grout performance criteria

Description: This report provides an assessment of how well we can resolve the following issues concerning Tank 241-AN-106 at the Hanford Reservation, given the current state of information: How well we can characterize the contents of 241-AN-106; whether the degree of characterization is sufficient to use 241-AN-106 wastes to develop tests of grout adequacy. The wastes must be characterized not only to ensure grout adequacy but also to provide assurance that the wastes can be successfully and safely transf… more
Date: February 1, 1993
Creator: Liebetrau, A.M. & Anderson, C.M.
Partner: UNT Libraries Government Documents Department
open access

The Analytical Repository Source-Term (AREST) model: Analysis of spent fuel as a nuclear waste form

Description: The purpose of this report is to assess the performance of spent fuel as a final waste form. The release of radionuclides from spent nuclear fuel has been simulated for the three repository sites that were nominated for site characterization in accordance with the Nuclear Waste Policy Act of 1982. The simulation is based on waste package designs that were presented in the environmental assessments prepared for each site. Five distinct distributions for containment failure have been considered, … more
Date: February 1, 1989
Creator: Apted, M. J.; Liebetrau, A. M. & Engel, D. W.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Tank 241-AN-106 characterization and grout performance criteria

Description: This report provides an assessment of how well we can resolve the following issues concerning Tank 241-AN-106 at the Hanford Reservation, given the current state of information: How well we can characterize the contents of 241-AN-106; whether the degree of characterization is sufficient to use 241-AN-106 wastes to develop tests of grout adequacy. The wastes must be characterized not only to ensure grout adequacy but also to provide assurance that the wastes can be successfully and safely transf… more
Date: February 1, 1993
Creator: Liebetrau, A. M. & Anderson, C. M.
Partner: UNT Libraries Government Documents Department
open access

A Single Model Procedure for Estimating Tank Calibration Equations

Description: A fundamental component of any accountability system for nuclear materials is a tank calibration equation that relates the height of liquid in a tank to its volume. Tank volume calibration equations are typically determined from pairs of height and volume measurements taken in a series of calibration runs. After raw calibration data are standardized to a fixed set of reference conditions, the calibration equation is typically fit by dividing the data into several segments--corresponding to regi… more
Date: October 1, 1997
Creator: Liebetrau, A. M.
Partner: UNT Libraries Government Documents Department
open access

An evaluation and analysis of three dynamic watershed acidification codes (MAGIC, ETD, and ILWAS)

Description: The US Environmental Protection Agency is currently using the dynamic watershed acidification codes MAGIC, ILWAS, and ETD to assess the potential future impact of the acidic deposition on surface water quality by simulating watershed acid neutralization processes. The reliability of forecasts made with these codes is of considerable concern. The present study evaluates the process formulations (i.e., conceptual and numerical representation of atmospheric, hydrologic geochemical and biogeochemic… more
Date: January 1, 1989
Creator: Jenne, E. A.; Eary, L. E.; Vail, L. W.; Girvin, D. C.; Liebetrau, A. M.; Hibler, L. F. et al.
Partner: UNT Libraries Government Documents Department
open access

Uncertainty and Sampling Issues in Tank Characterization

Description: A defensible characterization strategy must recognize that uncertainties are inherent in any measurement or estimate of interest and must employ statistical methods for quantifying and managing those uncertainties. Estimates of risk and therefore key decisions must incorporate knowledge about uncertainty. This report focuses statistical methods that should be employed to ensure confident decision making and appropriate management of uncertainty. Sampling is a major source of uncertainty that de… more
Date: June 1, 1997
Creator: Liebetrau, A. M.; Pulsipher, B. A. & Kashporenko, D. M.
Partner: UNT Libraries Government Documents Department
open access

Characterization Report for the Ferrocyanide Safety Issue

Description: Recently PNNL was tasked by DOE to develop and demonstrate a risk-based strategic approach to characterizing Hanford`s Nuclear Waste Tanks. This strategic approach was documented in a report entitled ``A Risk-Based Focused Decision-Management Approach for Justifying Characterization of Hanford Tank Waste``. In support of the general approach, a specific strategy for addressing each of the several safety issues associated with the tanks was developed. This report documents the approach for the F… more
Date: June 1, 1997
Creator: Pulsipher, B. A.; Burger, L. L.; Liebetrau, A. M. & Scheele, R. D.
Partner: UNT Libraries Government Documents Department
open access

An example postclosure risk assessment using the potential Yucca Mountain Site

Description: The risk analysis described in this document was performed for the US Department of Energy`s (DOE) Office of Civilian Radioactive Waste Management (OCRWM) over a 2-year time period ending in June 1988. The objective of Pacific Northwest Laboratory`s (PNL) task was to demonstrate an integrated, though preliminary, modeling approach for estimating the postclosure risk associated with a geologic repository for the disposal of high-level nuclear waste. The modeling study used published characteriza… more
Date: May 1, 1992
Creator: Doctor, P. G.; Eslinger, P. W.; Elwood, D. M.; Engel, D. W.; Freshley, M. D.; Liebetrau, A. M. et al.
Partner: UNT Libraries Government Documents Department
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