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Multiple Event Considerations for Postclosure Seismic Hazard Evaluations at Yucca Mountain, Nevada

by Richard C. Lee, Science Applications Intl Corp, Las Vegas, United States,
Jerry L. King, Science Applications Intl Corp, Las Vegas, United States,
Terry A. Grant, Science Applications Intl Corp, Las Vegas, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1991

Abstract:

Postclosure waste canister design requirements suggest the values used for seismic design have less than a 10% chance of being exceeded in a 1,000 year postclosure period. Considerably longer periods (10,000 years) for waste canister design are being considered to take into account potentially longer engineered canister lifetimes and the corresponding potential for a radio-nuclide barrier with increased performance. Such lengthy design periods may entail engineering design of waste systems that would be exposed to multiple episodes of seismic strong shaking without any benefit of retrofit or repair following each event. Reconnaissance seismic hazard studies conducted for the waste handling facility suggest that repository block waste canister design include consideration for the occurrence of multiple episodes of strong motion if postclosure periods greater than 1,000 years are considered.

Subject Headings: Seismic design | Radioactive wastes | Seismic tests | Waste disposal | Load and resistance factor design | Systems engineering | Geohazards | Nevada | United States

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