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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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NNSA awards BWXT $1.5B defense fuels contract
The Department of Energy’s National Nuclear Security Administration has awarded BWX Technologies a contract valued at $1.5 billion to build a Domestic Uranium Enrichment Centrifuge Experiment (DUECE) pilot plant in Tennessee in support of the administration’s efforts to build out a domestic supply of unobligated enriched uranium for defense-related nuclear fuel.
Tanvir Salim, Woon-Shing Yeung, R. Thomas Fernandez
Nuclear Technology | Volume 89 | Number 2 | February 1990 | Pages 227-232
Technical Paper | Heat Transfer and Fluid Flow | doi.org/10.13182/NT90-A34349
Articles are hosted by Taylor and Francis Online.
A model to calculate the void fraction in counter-current flow for geometries with abrupt area change is proposed. Continuity and momentum equations are used to derive a quartic equation for the void fraction. By varying the known physical parameters, the quartic equation is solved to get a wide range of results that are physically consistent. The model is applied for the special case of flooding at abrupt area change geometry, and a comparison with data is made.
