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Title: Integrating Risk Analyses & Tools at the DOE Hanford Site

Abstract

Risk assessment and environmental impact analysis at the U.S. Department of Energy (DOE) Hanford Site in Washington State has made significant progress in refining the strategy for using risk analysis to support closing of several hundred waste sites plus 149 single-shell tanks at the Hanford Site. A Single-Shell Tank System Closure Work Plan outlines the current basis for closing the single-shell tank systems. An analogous site approach has been developed to address closure of aggregated groups of similar waste sites. Because of the complexity, decision time frames, proximity of non-tank farm waste sites to tank farms, scale, and regulatory considerations, various projects are providing integrated assessments to support risk analyses and decision-making. Projects and the tools that are being developed and applied at Hanford to support retrieval and cleanup decisions include: (1) Life Cycle Model (LCM) and Risk Receptor Model (RRM)--A site-level set of tools to support strategic analyses through scoping level risk management to assess different alternatives and options for tank closure. (2) Systems Assessment Capability for Integrated Groundwater Nadose Zone (SAC) and the Site-Wide Groundwater Model (SWGM)--A site-wide groundwater modeling system coupled with a risk-based uncertainty analysis of inventory, vadose zone, groundwater, and river interactions for evaluating cumulativemore » impacts from individual and aggregate waste sites. (3) Retrieval Performance Evaluation (RPE)--A site-specific, risk-based methodology developed to evaluate performance of waste retrieval, leak detection and closure on a tank-specific basis as a function of past tank Leaks, potential leakage during retrieval operations, and remaining residual waste inventories following completion of retrieval operations. (4) Field Investigation Report (FIR)--A corrective action program to investigate the nature and extent of past tank leaks through characterization activities and assess future impacts to determine if there is a need to implement interim measures or take corrective action before closing the tank farms. This list is not meant to be all inclusive of risk analysis projects and tools at the Hanford Site. It is intended to highlight a small set of projects and illustrate the process of integrating risk analysis information for a complex set of interrelated interim decisions and issues for various types of waste sites. New and emerging information relative to long-term human health risks during and following tank and non-tank site closure show the importance and usefulness of an integrated risk framework for decision-making. This paper will describe the approach for using risk assessment to support waste site and tank closure decisions, the tools being developed, and how integration of these risk assessments and analyses are being performed to address near-term and long-term decisions.« less

Authors:
Publication Date:
Research Org.:
DOE-ORP (US)
Sponsoring Org.:
USDOE Office of Environmental Management (EM) (US)
OSTI Identifier:
808565
Report Number(s):
HNF-9927-FP, Rev.0
TRN: US0302201
DOE Contract Number:  
AC06-96RL13200
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 25 Jan 2002
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; DECISION MAKING; DETECTION; ENVIRONMENTAL IMPACTS; LIFE CYCLE; REFINING; RISK ASSESSMENT; SIMULATION; STORAGE FACILITIES; TANKS; WASTE RETRIEVAL

Citation Formats

LOBER, R W. Integrating Risk Analyses & Tools at the DOE Hanford Site. United States: N. p., 2002. Web.
LOBER, R W. Integrating Risk Analyses & Tools at the DOE Hanford Site. United States.
LOBER, R W. Fri . "Integrating Risk Analyses & Tools at the DOE Hanford Site". United States. https://www.osti.gov/servlets/purl/808565.
@article{osti_808565,
title = {Integrating Risk Analyses & Tools at the DOE Hanford Site},
author = {LOBER, R W},
abstractNote = {Risk assessment and environmental impact analysis at the U.S. Department of Energy (DOE) Hanford Site in Washington State has made significant progress in refining the strategy for using risk analysis to support closing of several hundred waste sites plus 149 single-shell tanks at the Hanford Site. A Single-Shell Tank System Closure Work Plan outlines the current basis for closing the single-shell tank systems. An analogous site approach has been developed to address closure of aggregated groups of similar waste sites. Because of the complexity, decision time frames, proximity of non-tank farm waste sites to tank farms, scale, and regulatory considerations, various projects are providing integrated assessments to support risk analyses and decision-making. Projects and the tools that are being developed and applied at Hanford to support retrieval and cleanup decisions include: (1) Life Cycle Model (LCM) and Risk Receptor Model (RRM)--A site-level set of tools to support strategic analyses through scoping level risk management to assess different alternatives and options for tank closure. (2) Systems Assessment Capability for Integrated Groundwater Nadose Zone (SAC) and the Site-Wide Groundwater Model (SWGM)--A site-wide groundwater modeling system coupled with a risk-based uncertainty analysis of inventory, vadose zone, groundwater, and river interactions for evaluating cumulative impacts from individual and aggregate waste sites. (3) Retrieval Performance Evaluation (RPE)--A site-specific, risk-based methodology developed to evaluate performance of waste retrieval, leak detection and closure on a tank-specific basis as a function of past tank Leaks, potential leakage during retrieval operations, and remaining residual waste inventories following completion of retrieval operations. (4) Field Investigation Report (FIR)--A corrective action program to investigate the nature and extent of past tank leaks through characterization activities and assess future impacts to determine if there is a need to implement interim measures or take corrective action before closing the tank farms. This list is not meant to be all inclusive of risk analysis projects and tools at the Hanford Site. It is intended to highlight a small set of projects and illustrate the process of integrating risk analysis information for a complex set of interrelated interim decisions and issues for various types of waste sites. New and emerging information relative to long-term human health risks during and following tank and non-tank site closure show the importance and usefulness of an integrated risk framework for decision-making. This paper will describe the approach for using risk assessment to support waste site and tank closure decisions, the tools being developed, and how integration of these risk assessments and analyses are being performed to address near-term and long-term decisions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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