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Summary of the technical report on estimating the impact of key programmatic risk allocation decisions on Phase 1 bids and U.S. Department of Energy costs

Description: The US Department of Energy (DOE) is privatizing the processing of hazardous and radioactive tank waste at the Hanford Site in Washington State. As part of the privatization process, a request for proposals describing the conditions and DOE`s expectations for contractor performance and responsibilities was issued. Argonne National Laboratory and Pacific Northwest National Laboratory collaborated to analyze programmatic risks and costs associated with privatization. They examined nine major risk… more
Date: May 1, 1996
Creator: Keisler, J.M. & Buehring, W.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Real-time earthquake alert system for the greater San Francisco Bay Area: a prototype design to address operational issues

Description: The purpose of the earthquake alert system (EAS) is to outrun the seismic energy released in a large earthquake using a geographically distributed network of strong motion sensors that telemeter data to a rapid CPU-processing station, which then issues an area-wide warning to a region before strong motion will occur. The warning times involved are short, from 0 to 30 seconds or so; consequently, most responses must be automated. The San Francisco Bay Area is particularly well suited for an EAS … more
Date: December 10, 1996
Creator: Harben, P.E.; Jarpe, S. & Hunter, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Impact of ground motion characterization on conservatism and variability in seismic risk estimates

Description: This study evaluates the impact, on estimates of seismic risk and its uncertainty, of alternative methods in treatment and characterization of earthquake ground motions. The objective of this study is to delineate specific procedures and characterizations that may lead to less biased and more precise seismic risk results. This report focuses on sources of conservatism and variability in risk that may be introduced through the analytical processes and ground-motion descriptions which are commonl… more
Date: July 1, 1996
Creator: Sewell, R. T.; Toro, G. R. & McGuire, R. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quantification of seismic liquefaction risk

Description: Explicit goals of acceptable risk for natural phenomena hazards (earthquake, extreme wind, and flood) have been established by the Department of Energy (DOE) 1994. Closely associated to the earthquake risk is the issue of seismically-induced liquefaction. Because deterministic methods currently available to answer the question to whether a site is liquefiable or not are incapable of providing a clue as to the likelihood or risk of liquefaction, the application of the criteria to a given facilit… more
Date: February 29, 1996
Creator: Arango, I.; Ostadan, F.; Lewis, M. R. & Gutierrez, B. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Summary of geotechnical services for the proposed Route 24/580/980 interchange improvement in Oakland, California

Description: This report presents a summary of the geotechnical services in connection with the proposed Route 24/580/980 Interchange Improvement in Oakland, California. The purpose of the work was to provide drilling equipment and personnel to log test borings, collect soils samples, testing of excess soil cutting for environmental concerns and disposal of excess soils cutting. A field investigation was conducted from September 7 through September 26, 1995. The field work consisted of drilling 7 borings (B… more
Date: February 1, 1996
Creator: Tabatabaie, A. & Majchrzak, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Site-specific probabilistic seismic hazard analyses for the Idaho National Engineering Laboratory. Volume 1: Final report

Description: This report describes and summarizes a probabilistic evaluation of ground motions for the Idaho National Engineering Laboratory (INEL). The purpose of this evaluation is to provide a basis for updating the seismic design criteria for the INEL. In this study, site-specific seismic hazard curves were developed for seven facility sites as prescribed by DOE Standards 1022-93 and 1023-96. These sites include the: Advanced Test Reactor (ATR); Argonne National Laboratory West (ANL); Idaho Chemical Pro… more
Date: May 1, 1996
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Impact of structural aging on seismic risk assessment of reinforced concrete structures in nuclear power plants

Description: The Structural Aging Program is addressing the potential for degradation of concrete structural components and systems in nuclear power plants over time due to aging and aggressive environmental stressors. Structures are passive under normal operating conditions but play a key role in mitigating design-basis events, particularly those arising from external challenges such as earthquakes, extreme winds, fires and floods. Structures are plant-specific and unique, often are difficult to inspect, a… more
Date: March 1996
Creator: Ellingwood, B. & Song, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mitigation of earthquake hazards using seismic isolation systems

Description: This paper describes mitigation of earthquake hazards using seismic base isolation systems. A numerical algorithm for analyzing system response of base-isolated structures with laminated elastomer bearings is briefly described. Seismic response analyses of both base- isolated and unisolated buildings under earthquakes {number_sign}42 and {number_sign}44 are performed and the results are compared to illustrate the mitigating effect of base-isolated systems.
Date: June 1, 1996
Creator: Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ground motion input in seismic evaluation studies

Description: This report documents research pertaining to conservatism and variability in seismic risk estimates. Specifically, it examines whether or not artificial motions produce unrealistic evaluation demands, i.e., demands significantly inconsistent with those expected from real earthquake motions. To study these issues, two types of artificial motions are considered: (a) motions with smooth response spectra, and (b) motions with realistic variations in spectral amplitude across vibration frequency. Fo… more
Date: July 1, 1996
Creator: Sewell, R. T. & Wu, S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ground motion input in seismic evaluation studies: impacts on risk assessment of uniform hazard spectra

Description: Conservatism and variability in seismic risk estimates are studied: effects of uniform hazard spectrum (UHS) are examined for deriving probabilistic estimates of risk and in-structure demand levels, as compared to the more-exact use of realistic time history inputs (of given probability) that depend explicitly on magnitude and distance. This approach differs from the conventional in its exhaustive treatment of the ground-motion threat and in its more detailed assessment of component responses t… more
Date: July 1, 1996
Creator: Wu, S. C. & Sewell, R. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Earthquake early warning system using real-time signal processing

Description: An earthquake warning system has been developed to provide a time series profile from which vital parameters such as the time until strong shaking begins, the intensity of the shaking, and the duration of the shaking, can be derived. Interaction of different types of ground motion and changes in the elastic properties of geological media throughout the propagation path result in a highly nonlinear function. We use neural networks to model these nonlinearities and develop learning techniques for… more
Date: February 1, 1996
Creator: Leach, Jr., R. R. & Dowla, F. U.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Statistical classification methods applied to seismic discrimination

Description: To verify compliance with a Comprehensive Test Ban Treaty (CTBT), low energy seismic activity must be detected and discriminated. Monitoring small-scale activity will require regional (within {approx}2000 km) monitoring capabilities. This report provides background information on various statistical classification methods and discusses the relevance of each method in the CTBT seismic discrimination setting. Criteria for classification method selection are explained and examples are given to ill… more
Date: June 11, 1996
Creator: Ryan, F. M.; Anderson, D. N.; Anderson, K. K.; Hagedorn, D. N.; Higbee, K. T.; Miller, N. E. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Site-specific probabilistic seismic hazard analyses for the Idaho National Engineering Laboratory. Volume 2: Appendices

Description: The identification of seismic sources is often based on a combination of geologic and tectonic considerations and patterns of observed seismicity; hence, a historical earthquake catalogue is important. A historical catalogue of earthquakes of approximate magnitude (M) 2.5 and greater for the time period 1850 through 1992 was compiled for the INEL region. The primary data source used was the Decade of North American Geology (DNAG) catalogue for the time period from about 1800 through 1985 (Engda… more
Date: May 1996
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthetic seismograms at regional distances for May 1995 earthquake and explosion sources in Western China

Description: Waveforms recorded at several regional seismic stations at varying azimuths form explosion and earthquake sources in western China exhibit marked variation from station to station. We have performed two-dimensional finite difference simulations of these events, using moment tensor sources and simple crustal structure models, to generate synthetic seismograms at these locations. The synthetic seismograms at three locations exhibit behavior that is qualitatively consistent with the data, while co… more
Date: August 1, 1996
Creator: App, F. N.; Bos, R. J. & Kamm, J. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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