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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.
Khaled Meftah, Arthur E. Ruggles
Nuclear Technology | Volume 154 | Number 3 | June 2006 | Pages 328-334
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT06-A3737
Articles are hosted by Taylor and Francis Online.
A scaled model boiling water reactor (SMBWR) uses water at 0.095 MPa in a transparent heated channel 0.5 m in length with four electrical heated fuel simulator rods. The axial void profile in the channel is measured using conductivity probes. The boiling channel exhibits bubbly and churn flow regimes. In the present study, the bubbly-churn regime transition is investigated using the variance, kurtosis, and skewness of the probability density function (pdf) derived from the conductivity measurements. The positioning of five conductivity sensors along the boiling water channel allows examination of the gradual changes in the flow regime characteristics. The results indicate it is possible to detect the bubbly-to-churn flow regime transition using the pdf distribution attributes of the conductivity probes.