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Atlanta, GA|Atlanta Marriott Marquis
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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.
G. Srikantiah
Nuclear Science and Engineering | Volume 24 | Number 2 | February 1966 | Pages 175-183
Technical Paper | doi.org/10.13182/NSE66-A18302
Articles are hosted by Taylor and Francis Online.
Methods of long-term reactivity control for plutonium-fueled D2O-moderated reactors that favor high conversion ratios are considered. One method uses annular gaps around the fuel elements that can be selectively filled with the D2O moderator. Reactivity compensations ranging from 8 to 15% can be achieved with gaps of 6 to 8-cm thickness and a corresponding reduction in conversion ratio of 3 to 5%. In the second method, depleted uranium sleeves that can be removed as required during long-term operation are utilized around fuel elements in annular regions of the reactor. Sleeves of only 0.2-cm thickness, around fuel elements in the central region of the reactor, provide reactivity compensations of up to 10% and actually increase the conversion ratio in the design studied. Average conversion ratios of about 0.90 are obtained in a large D2O-cooled and -moderated reactor using Zircaloy pressure tubes at fuel burnup of 104 MWd/t. The average conversion ratios would increase to about 0.97 if beryllium-based pressure tubes could be developed.
