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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Urenco progresses on expansion, partners with Aalo
The startup of a new cascade of gas centrifuge at Urenco USA’s (UUSA) uranium enrichment facility in Eunice, N.M came ahead of schedule and on budget, according to the company.
Dean Dobranich, Mohamed S. El-Genk
Nuclear Technology | Volume 94 | Number 3 | June 1991 | Pages 372-382
Technical Paper | Nuclear Fuel Cycle | doi.org/10.13182/NT91-A15815
Articles are hosted by Taylor and Francis Online.
Particle-bed reactors have been proposed to provide high-temperature, low-mass power sources for space-based operation. A computer program was prepared to simulate the thermal and mechanical response of a multilayered fuel particle operating in such a reactor. Issues of concern include temperature gradient and interference thermal stresses, along with the plastic and creep deformations associated with the high temperature of operation. The results of the computer simulations indicate that the interference thermal stress is much larger than the temperature gradient stress and the external pressure stress, and that permanent strain formation cannot be avoided for particles operating at temperatures greater than ∼2300 K. The results also reveal some interesting aspects unique to multilayered fuel particle performance. Two such aspects include (a) the interaction between interference thermal stress and high-temperature creep and (b) the effect of power ramp time on the formation of time-dependent plastic strains.