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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,171 records · Page 65
All sourcesNASA NTRSDOE OSTI
DOE OSTI2012

Seismic Data Acquisition at the FACT Site for the CASPAR Project

Since May 2010, we have been recording continuous seismic data at Sandia's FACT site. The collected signals provide us with a realistic archive for testing algorithms under development for local monitoring of explosive testing. Numerous small explosive tests are routinely conducted around Kirtland AFB by different organizations. Our goal is to identify effective methods for distinguishing these events from normal daily activity on and near the base, such as vehicles, aircraft, and storms. In this report, we describe the recording system, and present some observations of the varying ambient noise conditions at FACT. We present examples of various common, non-explosive, sources. Next we show signals from several small explosions, and discuss their characteristic features.

58 GEOSCIENCES↗
DOE OSTI2012

SPE2 Far-field Seismic Data Quicklook

The purpose of this report is to provide a brief overview of the far-field seismic data collected by the array of instruments (Figures 1 and 2) deployed by the Source Physics experiment for shots 1 (roughly 100 kg TNT equivalent at a depth of 60 m) and shot 2, (roughly 2000 kg TNT equivalent at a depth of 45 m). 'Far-field' is taken to refer to instruments in the zone of purely elastic response at distances of 100 m or greater. The primary focus is data from the main instrument array and hence data from other groups is not considered. Infrasound data is not addressed nor any remote sensing data. Data processing was done at LLNL in parallel with the effort at UNR. Raw reftek data was sent via hard disk from NsTec. Reftek data was converted to SEGY and then to SAC format. Data files were renamed according to station and channel information. Reftek logs were reviewed. These data have been reviewed for consistency with the UNR data on the server. The primary goal was quality check and a summary is provided in Tables 1 and 2.

58 GEOSCIENCES↗
DOE OSTI2013

Seismic Fire Evaluation

This report describes an approach for modeling the number of ignitions (fires) following an earthquake. It is an update from a previous calculation (March 2012), “Modeling the Number of Ignitions Following an Earthquake: Developing Prediction Limits for Overdispersed Count Data,” performed by Elizabeth Kelly and Raymond Tell. This update incorporates comments from two reviews conducted by Douglas Honneger (March 2011) and Shane Reese (February 2013). Also, a comparison is made here with the Nuclear Regulatory Commission methodology developed by John Lambright for prediction of the likelihood of a seismically-induced fire for the resolution of Generic Issue 57, “Evaluation of Generic Issue 57: Effects of Fire Protection System Actuation on Safety-Related Equipment,” NUREG-5580.

42 ENGINEERING↗
DOE OSTI2013

Karst characterization in a semi-arid region using gravity, seismic, and resistivity geophysical techniques.

We proposed to customize emerging in situ geophysical monitoring technology to generate time-series data during sporadic rain events in a semi-arid region. Electrodes were to be connected to wireless \nodes" which can be left in the eld for many months. Embedded software would then increase sampling frequency during periods of rainfall. We hypothesized that this contrast between no-volume ow in karst passageways dur- ing dry periods and partial- or saturated-volume ow during a rain event is detectable by these Wireless Sensor Network (WSN) geophysical nodes, we call this a Wireless Resistivity Network (WRN). The development of new methodologies to characterize semi-arid karst hydrology is intended to augment Sandia National Laboratorys mission to lead e orts in energy technologies, waste disposal and climate security by helping to identify safe and secure regions and those that are at risk. Development and initial eld testing identi ed technological barriers to using WRNs for identifying semi-arid karst, exposing R&D which can be targeted in the future. Gravity, seismic, and resis- tivity surveys elucidated how each technique might e ectively be used to characterize semi-arid karst. This research brings to light the importance and challenges with char- acterizing semi-arid karst through a multi-method geophysical study. As there have been very few studies with this emphasis, this study has expanded the body of practical experience needed to protect the nations water and energy security interests.

Barnhart, Kevin Scott↗
DOE OSTI2013

Compilation of Criteria and Summaries from B332 Seismic Evaluations for the Initial Scoping Document Release of the HS-45 LLNL Audit, February 7, 2013

This study consists of separate evaluations of Increment I, Increment III and the Plenum Building. The analysis was limited to the structural components of these structures and did not include architectural features, components nor mechanical or electrical equipment or systems. The seismic analysis was an elastic dynamic analysis following the UCRL-15910 guidelines.

58 GEOSCIENCES↗
DOE OSTI2013

Tier 1 Seismic Evaluation of 41 Buildings

This seismic Evaluation Report summarizes Tier I evaluations for 41 buildings at Lawrence Livermore National Laboratory in accordance with ASCE 31 Life Safety criteria for a 10% in 50 year earthquake.

58 GEOSCIENCES↗
DOE OSTI2014

Seismic and Infrasound Location

This presentation includes slides on Signal Propagation Through the Earth/Atmosphere Varies at Different Scales; 3D Seismic Models: RSTT; Ray Coverage (Pn); Source-Specific Station Corrections (SSSCs); RSTT Conclusions; SALSA3D (SAndia LoS Alamos) Global 3D Earth Model for Travel Time; Comparison of IDC SSSCs to RSTT Predictions; SALSA3D; Validation and Model Comparison; DSS Lines in the Siberian Platform; DSS Line CRA-4 Comparison; Travel Time Δak135; Travel Time Prediction Uncertainty; SALSA3D Conclusions; Infrasound Data Processing: An example event; Infrasound Data Processing: An example event; Infrasound Location; How does BISL work?; BISL: Application to the 2013 DPRK Test; and BISL: Ongoing Research.

58 GEOSCIENCES↗
DOE OSTI2014

230 Th/U ages Supporting Hanford Site-Wide Probabilistic Seismic Hazard Analysis

This product represents a USGS Administrative Report that discusses samples and methods used to conduct uranium-series isotope analyses and resulting ages and initial 234U/238U activity ratios of pedogenic cements developed in several different surfaces in the Hanford area middle to late Pleistocene. Samples were collected and dated to provide calibration of soil development in surface deposits that are being used in the Hanford Site-Wide probabilistic seismic hazard analysis conducted by AMEC. The report includes description of sample locations and physical characteristics, sample preparation, chemical processing and mass spectrometry, analytical results, and calculated ages for individual sites. Ages of innermost rinds on a number of samples from five sites in eastern Washington are consistent with a range of minimum depositional ages from 17 ka for cataclysmic flood deposits to greater than 500 ka for alluvium at several sites.

58 GEOSCIENCES↗
DOE OSTI2014

Application of Active Seismic and Electrical Methods to Detect and Characterize Subsurface Effects of an Underground Explosion

During the period of underground nuclear testing in the U.S., now ended for over 20 years, the focus of work was to conduct the test and analyze the data as quickly as possible; there was little concern about application of technologies that could be used to detect and characterize the location and depth of the explosion. Thus, there is little experience with applying geophysical methods in places where an underground nuclear explosion (UNE) has taken place. On the other hand, application of geophysical methods to the detection of shallow artifacts and water table depth is commonly applied in the environmental remediation and site characterization realm of commercial geophysical surveys. For nuclear nonproliferation treaty applications which may incorporate both shallow and deep geophysical probing methods (such as on-site inspection (OSI) under the Comprehensive Nuclear Test Ban Treaty [CTBT]), there thus remains a need to better understand detection capabilities of the deeper targets: anomalies related to an explosion cavity or rubble zone that may be located several hundred meters below the ground surface. The purpose of this Coordinated Inspection Technologies (CIT) project was to gain experience in applying active seismic methods and electrical methods at a site in Nevada where an underground nuclear test (UNE) had been conducted in the past to get a better understanding of the capabilities of these methods for detection and characterization of deep subsurface effects of the explosion.

58 GEOSCIENCES↗
DOE OSTI2015

Finding Large Aperture Fractures in Geothermal Resource Areas Using a Three-Component Long-Offset Surface Seismic Survey, PSInSAR and Kinematic Structural Analysis

The DOE cost-share program applied innovative and cutting edge seismic surveying and processing, permanent scatter interferometry-synthetic aperture radar (PSInSAR) and structural kinematics to the exploration problem of locating and mapping largeaperture fractures (LAFs) for the purpose of targeting geothermal production wells. The San Emidio geothermal resource area, which is under lease to USG, contains production wells that have encountered and currently produce from LAFs in the southern half of the resource area (Figure 2). The USG lease block, incorporating the northern extension of the San Emidio geothermal resource, extends 3 miles north of the operating wellfield. The northern lease block was known to contain shallow thermal waters but was previously unexplored by deep drilling. Results of the Phase 1 exploration program are described in detail in the Phase 1 Final Report (Teplow et al., 2011). The DOE cost shared program was completed as planned on September 30, 2014. This report summarizes results from all of Phase 1 and 2 activities.

15 GEOTHERMAL ENERGY↗
DOE OSTI2015

Fabry-Perot MEMS Accelerometers for Advanced Seismic Imaging

This report summarizes the technical achievements that occurred over the duration of the project. On November 14th, 2014, Lumedyne Technologies Incorporated was acquired. As a result of the acquisition, the work toward seismic imaging applications was suspended indefinitely. This report captures the progress achieved up to that time.

02 PETROLEUM↗
DOE OSTI2015

Passive seismic investigation of Harrat Rahat

Ambient noise correlation was applied to 18 months of continuous seismic data from 14 stations. The procedure of Bensen et al [2007] was followed with some changes to optimize signal-to-noise of the results. The 18 months of correlations (representing about 1 week of CPU time on a 12 core machine) were stacked and manually inspected to yield about 40 cross-correlations. These cross-correlations represent the Green’s function between the station pairs and will be analyzed in part two of this project to yield velocity structure.

15 GEOTHERMAL ENERGY↗
DOE OSTI2015

BUILDING 341 Seismic Evaluation

The Seismic Evaluation of Building 341 located at Lawrence Livermore National Laboratory in Livermore, California has been completed. The subject building consists of a main building, Increment 1, and two smaller additions; Increments 2 and 3.

42 ENGINEERING↗
DOE OSTI2016

Real-time Microseismic Processing for Induced Seismicity Hazard Detection

Induced seismicity is inherently associated with underground fluid injections. If fluids are injected in proximity to a pre-existing fault or fracture system, the resulting elevated pressures can trigger dynamic earthquake slip, which could both damage surface structures and create new migration pathways. The goal of this research is to develop a fundamentally better approach to geological site characterization and early hazard detection. We combine innovative techniques for analyzing microseismic data with a physics-based inversion model to forecast microseismic cloud evolution. The key challenge is that faults at risk of slipping are often too small to detect during the site characterization phase. Our objective is to devise fast-running methodologies that will allow field operators to respond quickly to changing subsurface conditions.

15 GEOTHERMAL ENERGY↗
DOE OSTI2017

Numerical Simulations of 3D Seismic Data Final Report CRADA No. TC02095.0

This was a collaborative effort between Lawrence Livermore National Security, LLC (formerly The Regents of the University of Califomia)/Lawrence-Livermore National Laboratory (LLNL) and Schlumberger Cambridge Research (SCR), to develop synthetic seismic data sets and supporting codes.

02 PETROLEUM↗