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AlGaN High Electron Mobility Transistor for Power Switches and High Temperature Logic

Klein, Brianna A.; Armstrong, Andrew A.; Allerman, Andrew A.; Nordquist, Christopher D.; Neely, Jason C.; Reza, Shahed; Douglas, Erica A.; Van Heukelom, Michael; Rice, Anthony; Patel, Victor J.; Matins, Benjamin; Fortune, Torben; Rosprim, Mary R.; Caravello, Lisa A.; Bays, Nathan R.; Pipkin, Jennifer R.; Abate, Vincent M.; Kaplar, Robert J.

Abstract not provided.

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TYPE Conference Presentation YEAR 2021
DOIOSTI

Uncertainty Analysis and Software Verification

Leyva, Nha T.A.H.

Uncertainty analyses are an important part of calibrations and testing. They allow researchers insight on how to reduce and mitigate errors in testing. Each device used in testing introduces error in a system, as well as other sources such as environmental conditions, electronics, analog to digital, and random errors. Each source is carefully examined to identify how much error it introduces to a system. These sources are then combined using various methods of uncertainty calculations. To verify and validate software, a manual calculation is required to ensure the software is performing as intended. Using Excel to verify the calculations, we can identify discrepancies within the software. The root of the sum of the squares uncertainty (RSS) is used to find the combined uncertainty of a device at one and two standard deviations of the mean. Calibrations on accelerometers are performed using a vibration system along with a back-toback reference accelerometer. The vibration system takes a reference point at 100Hz frequency at 10g amplitude. The sensitivities are collected at each dialed in frequency. The sensitivity of the device represents the electrical output of the UUT (mV, pC, etc.) per unit of acceleration (g). The full history of sensitivities of selected accelerometers are used to find the averaged, standard deviation, and uncertainty of the device at each frequency tested. The uncertainty calculations from excel and the software are then compared.

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TYPE Other Report YEAR 2021
OSTIDOIOSTI

Salt International Collaborations FY2021 Update

Kuhlman, Kristopher L.; Matteo, Edward N.; Mills, Melissa M.; Jayne, Richard S.; Reedlunn, Benjamin; Sobolik, Steven; Bays, Nathan R.; Stein, Emily; Gross, Mike

This report summarizes the international collaboration work conducted by Sandia and funded by the US Department of Energy Office (DOE) of Nuclear Energy Spent Fuel and Waste Science & Technology (SFWST) as part of the Sandia National Laboratories Salt R&D and Salt International work packages. This report satisfies the level-three milestone M3SF-20SN010303062. Several stand-alone sections make up this summary report, each completed by the participants. The sections discuss international collaborations on geomechanical benchmarking exercises (WEIMOS), granular salt reconsolidation (KOMPASS), engineered barriers (RANGERS), and model comparison (DECOVALEX). Lastly, the report summarizes a newly developed working group on the development of scenarios as part of the performance assessment development process, and the activities related to the Nuclear Energy Agency (NEA) Salt club and the US/German Workshop on Repository Research, Design and Operations.

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TYPE Other Report YEAR 2021
DOIOSTIDOIOSTI

New Geomechanical Computation Analysis Evaluating Behavior of the Fault nearby BC-4

Park, Byoung

BC-4 is an abandoned brining cavern situated in the middle of the site. Its presence poses a concern for several reasons: 1) the cavern was leached up into the caprock; 2) it is similar to BC-7, a brining cavern on the northwest corner of the dome that collapsed in 1954 and now is the home to Cavern Lake; 3) a similar collapse of BC-4 would have catastrophic consequences for the future operation of the site. There exists a previously mapped fault feature in the caprock and thought to extend into the salt dome than runs in close proximity to BC-4. There are uncertainties about the true extent of the fault, and no explicit analysis has been performed to predict the effects of the fault on BC-4 stability. Additional knowledge of the fault and its effects is becoming more crucial as an enhanced monitoring program is developed and installed.

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TYPE Other Report YEAR 2021
DOIDOIOSTIOSTI

Interpolation data transfer between the models before and after a partial drawdown leach in BH

Park, Byoung

It has been recognized that as cavern operations become more frequent due to oil sales, field conditions may arise which require a faster turnaround time of analysis to address potential cavern impacts. This letter describes attempts to implement a strategy of transferring an intermediate solution of a Big Hill (BH) geomechanical model from a previous finite element mesh with a specified cavern geometry, to a new mesh with a new cavern geometry created by leaching from an oil sale operation.

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TYPE Other Report YEAR 2021
DOIDOIOSTIOSTI
Results 13351–13400 of 100,993
Results 13351–13400 of 100,993
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