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August 2025
Latest News
From operator to entrepreneur: David Garcia applies outage management lessons
David Garcia
If ComEd’s Zion plant in northern Illinois hadn’t closed in 1998, David Garcia might still be there, where he got his start in nuclear power as an operator at age 24.
But in his ninth year working there, Zion closed, and Garcia moved on to a series of new roles—including at Wisconsin’s Point Beach plant, the corporate offices of Minnesota’s Xcel Energy, and on the supplier side at PaR Nuclear—into an on-the-job education that he augmented with degrees in business and divinity that he sought later in life.
Garcia started his own company—Waymaker Resource Group—in 2014. Recently, Waymaker has been supporting Holtec’s restart project at the Palisades plant with staffing and analysis. Palisades sits almost exactly due east of the fully decommissioned Zion site on the other side of Lake Michigan and is poised to operate again after what amounts to an extended outage of more than three years. Holtec also plans to build more reactors at the same site.
For Garcia, the takeaway is clear: “This industry is not going away. Nuclear power and the adjacent industries that support nuclear power—and clean energy, period—are going to be needed for decades upon decades.”
In July, Garcia talked with Nuclear News staff writer Susan Gallier about his career and what he has learned about running successful outages and other projects.
B. J. Kern, D. L. Sadowski, S. M. Ghiaasiaan, S. I. Abdel-Khalik
Fusion Science and Technology | Volume 52 | Number 4 | November 2007 | Pages 958-962
Technical Paper | Inertial Fusion Technology: Drivers and Advanced Designs | doi.org/10.13182/FST07-A1618
Articles are hosted by Taylor and Francis Online.
Compressible two-phase (liquid/gas) jets have been proposed as a means of protecting the chamber walls in high-yield, low repetition rate, Z-Pinch IFE reactor systems. The aspect ratio (height-to-thickness/diameter ratio) of such jets is expected to be large, so that the void fraction may vary significantly along the flow direction. An experimental investigation was conducted to determine the effect of various design and operational parameters on the void fraction distribution within a planar, downward-flowing, two-phase (liquid/gas) free jet. An air/water jet with an initial cross section of 1.0 cm × 10.0 cm was used, and different liquid inlet velocities and gas-to-liquid volumetric flow rate ratios were tested. Local void fractions at different locations along the width and length of the jets were measured by gamma-ray densitometry. The results indicated that buoyancy caused significant slip between the two phases, leading to the conclusion that homogeneous two-phase flow models cannot accurately model the behavior of such jets. The data obtained in this investigation can be used to validate predictions of mechanistic models for jet dynamics and shock attenuation.
