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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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TVA and Entra1 to deploy 6 GW of NuScale SMRs
The Tennessee Valley Authority and Houston, Texas–based energy production company Entra1 Energy recently announced the signing of an agreement to collaborate on the deployment of six new nuclear power plants equipped with NuScale small modular reactors.
H. T. Lee, Y. Ohtsuka, Y. Ueda, K. Sugiyama, E. Markina, N. Yoshida
Fusion Science and Technology | Volume 63 | Number 1 | May 2013 | Pages 233-236
doi.org/10.13182/FST13-A16913
Articles are hosted by Taylor and Francis Online.
The structure and concentration distribution of He, H, and D in the ion implanted zone following simultaneous He-D irradiation in W was characterized. A shift in He bubble size from nanometer to tens of nanometers was observed between 800 K < T < 1000 K. The bubble field was found to extend to depths of 30-40 nm with mean concentrations of 4-5 at.%.. An order of magnitude increase in He trapping was observed at 800 K when the ion energy was increased from 0.3 to 1.0 keV. Depth profiles of the trapped D at 500 K indicatea marked decrease in the trapped amount coinciding with the He bubble layer. Conversely, enrichment in hydrogen concentration was observed. One hydrogen atom was found to trap in ratio with ~6 He atoms. Such preferential trapping of hydrogen appears to be an important process in the reduction of D diffusion into W due to He effects.