Measurements and preliminary interpretation of K-Reactor foundation response to man-made seismic excitation

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In support of the Savannah River Technology Center (SRTC) effort to develop K-Reactor seismic design basis ground motions, SRTC monitored local high-explosive tests at a free-field'' site adjacent to K-Reactor and on the {minus}40 level on the foundation of K-Reactor. The high-explosive tests were part of the SRTC/United States Geological Survey (USGS) regional refraction and attenuation experiment that used deeply buried high explosive charges near New Ellenton, Snelling, and at more distant South Carolina sites. The primary purpose of the Reactor measurements are to compare the relative amplitude and frequency content of ambient noise and shot generated ground motions measured ... continued below

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Pages: (22 p)

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Lee, R.C. & Stephenson, D.E. April 10, 1992.

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Description

In support of the Savannah River Technology Center (SRTC) effort to develop K-Reactor seismic design basis ground motions, SRTC monitored local high-explosive tests at a free-field'' site adjacent to K-Reactor and on the {minus}40 level on the foundation of K-Reactor. The high-explosive tests were part of the SRTC/United States Geological Survey (USGS) regional refraction and attenuation experiment that used deeply buried high explosive charges near New Ellenton, Snelling, and at more distant South Carolina sites. The primary purpose of the Reactor measurements are to compare the relative amplitude and frequency content of ambient noise and shot generated ground motions measured at the K-Reactor foundation level and in the free-field'' so that foundation effects to ground motions can be documented and possibly incorporated in the facility design basis. Data analysis indicates that one of the five high explosive tests provided sufficient excitations at K-Reactor to produce satisfactory signal-to-noise between about 1 Hz and 15 Hz. Within this frequency band, Fourier spectral amplitude ratios of motions recorded within the first 10 seconds of first motion show substantial reductions (30{endash}50%) on shot radial and transverse components for frequencies greater than about 3 to 5 Hz. Approximately 50% reductions between 10 to 15 Hz were seen on vertical component ratios, and amplifications of 100% at 4 Hz and 5 Hz{endash}6 Hz.

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Pages: (22 p)

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  • Other: DE92015885
  • Report No.: WSRC-RP-92-187
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/5176008 | External Link
  • Office of Scientific & Technical Information Report Number: 5176008
  • Archival Resource Key: ark:/67531/metadc1055074

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  • April 10, 1992

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 7:13 p.m.

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Lee, R.C. & Stephenson, D.E. Measurements and preliminary interpretation of K-Reactor foundation response to man-made seismic excitation, report, April 10, 1992; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc1055074/: accessed August 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.