Addressing earthquake strong ground motion issues at the Idaho National Engineering Laboratory

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:7236441

Wong, I G ^[1]; Silva, W J; Stark, C L ^[2]; Jackson, S; Smith, R P ^[3]

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1. Woodward-Clyde Consultants, Oakland, CA (United States)
2. Pacific Engineering Analysis, El Cerrito, CA (United States)
3. EG and G Idaho, Inc., Idaho Falls, ID (United States)

In the course of reassessing seismic hazards at the Idaho National Engineering Laboratory (INEL), several key issues have been raised concerning the effects of the earthquake source and site geology on potential strong ground motions that might be generated by a large earthquake. The design earthquake for the INEL is an approximate moment magnitude (M{sub w}) 7 event that may occur on the southern portion of the Lemhi fault, a Basin and Range normal fault that is located on the northwestern boundary of the eastern Snake River Plain and the INEL, within 10 to 27km of several major facilities. Because the locations of these facilities place them at close distances to a large earthquake and generally along strike of the causative fault, the effects of source rupture dynamics (e.g., directivity) could be critical in enhancing potential ground shaking at the INEL. An additional source issue that has been addressed is the value of stress drop to use in ground motions predictions. In terms of site geology, it has been questioned whether the interbedded volcanic stratigraphy beneath the ESRP and the INEL attenuates ground motions to a greater degree than a typical rock site in the western US. These three issues have been investigated employing a stochastic ground motion methodology which incorporates the Band-Limited-White-Noise source model for both a point source and finite fault, random vibration theory and an equivalent linear approach to model soil response.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 7236441
• Report Number(s): EGG-M-91365; CONF-9110122-29; ON: DE92017841
• Resource Relation: Conference: Natural phenomena hazards mitigation conference, St. Louis, MO (United States), 15-18 Oct 1991
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
EARTHQUAKES
STRESSES
GROUND MOTION
COMPUTERIZED SIMULATION
ENVIRONMENTAL IMPACTS
GEOLOGIC FAULTS
IDAHO NATIONAL ENGINEERING LABORATORY
MECHANICAL VIBRATIONS
NUCLEAR FACILITIES
POINT SOURCES
RUPTURES
SEISMIC WAVES
SENSITIVITY ANALYSIS
SNAKE RIVER PLAIN
FAILURES
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
MOTION
NATIONAL ORGANIZATIONS
RADIATION SOURCES
SEISMIC EVENTS
SIMULATION
US DOE
US ERDA
US ORGANIZATIONS
540250* - Environment
Terrestrial- Site Resource & Use Studies- (1990-)
580000 - Geosciences