Geophysical investigation: New Production Reactor Complex, Idaho National Engineering Laboratory

Technical Report · Sun Dec 01 04:00:00 EST 1991

DOI:https://doi.org/10.2172/10178149· OSTI ID:10178149

Filipkowski, F; Blackey, M; Davies, D; Levine, E N; Murphy, V ^[1]

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1. Weston Geophysical Corp., Westboro, MA (US)

Seismic crosshole and downhole velocity measurements were performed for two borehole arrays approximately 300 feet deep in conjunction with verticality measurements and geophysical logging of borehole WO-2 (to a depth of 4,960 feet) at the NPR site of the INEL. Past studies show that the site area is covered by a thin layer of soil which overlies numerous basalt flows interrupted by sandy and clayey interbeds. Compressional and shear wave velocities computed for these arrays revealed low velocity zones at the following elevation ranges for crosshole array No. 1: 4,893 feet to 4,873 feet (basalt rubble zone) and 4,705 feet to 4,686 feet (sediment interbed). Corresponding elevation ranges for crosshole array No. 2 include: 4,830 feet to 4,815 feet (sediment interbed), 4,785 feet to 4,765 feet (highly vesicular and fractured basalt), 4,715 feet to 4,705 feet (basalt rubble zone), and 4,672 feet to 4,667 feet (sediment interbed). In general, crosshole velocity data correlated between arrays with velocity differences possibly explained by localized lithologic changes. Due to scatter in the downhole velocity data, only velocity averages were computed. However, these downhole velocities correlated to the approximate mean crosshole velocity values and therefore independent confirmed the crosshole data. Geophysical logging of well WO-2 included natural gamma, neutron, and compensated density logs to a depth of 4,960 feet at which a viscous borehole fluid inhibited further investigation. Second runs of small sections of these logs were repeated satisfactorily for confirmation of certain anomalous areas.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States); Weston Geophysical Corp., Westboro, MA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 10178149
• Report Number(s): EGG-NPR--10689; ON: DE93019034
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220501
220600
58 GEOSCIENCES
580000
BASALT
BOREHOLES
CLAYS
DEPTH
EXPERIMENTAL DATA
FRACTURED RESERVOIRS
GAMMA LOGGING
GAMMA-GAMMA LOGGING
GEOPHYSICAL SURVEYS
GEOSCIENCES
IDAHO NATIONAL ENGINEERING LABORATORY
LITHOLOGY
MAPS
NEUTRON LOGGING
RESEARCH
TEST
TRAINING
PRODUCTION
IRRADIATION
MATERIALS TESTING REACTORS
RESERVOIR FLUIDS
ROCK MECHANICS
SAND
SEISMIC P WAVES
SEISMIC S WAVES
SEISMIC SURVEYS
SITE CHARACTERIZATION
SITING
SPECIAL PRODUCTION REACTORS
WAVE PROPAGATION