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Demonstration of a Repository Performance Assessment Capability at the U.S. Nuclear Regulatory Commission

by Richard Codell, U.S. Nuclear Regulatory Commission, Washington, United States,
Norman Eisenberg, U.S. Nuclear Regulatory Commission, Washington, United States,
Timothy McCartin, U.S. Nuclear Regulatory Commission, Washington, United States,
James Park, U.S. Nuclear Regulatory Commission, Washington, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1991

Abstract:

In order to better review licensing submittals for a High-Level Waste Repository, the U.S. Nuclear Regulatory Commission staff has expanded and improved its capability to conduct performance assessments. A demonstration of this capability used the limited data from Yucca Mountain, Nevada to investigate a small set of scenario classes. Models of release and transport of radionuclides from a repository via the groundwater and direct release pathways provided preliminary estimates of releases to the accessible environment for a 10,000 year simulation time. Latin hypercube sampling of input parameters was used to express results as distributions and to investigate model sensitivities. This methodology demonstration should not be interpreted as an estimate of performance of the proposed repository at Yucca Mountain, Nevada.

Subject Headings: Radioactive wastes | Federal government | Water resources | Recycling | Licensure and certification | Groundwater flow | Groundwater | Nevada | United States

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