4.5 Article

SCALE modeling of foil irradiations at WSU's TRIGA with sensitivity/uncertainty analysis

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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
卷 331, 期 12, 页码 5311-5323

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SPRINGER
DOI: 10.1007/s10967-022-08575-9

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TRIGA reactor model; U-237; U-239; Np-237; Np-239; Spectral index; TSUNAMI-3D; Reaction rate ratios

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The Washington State University TRIGA reactor was successfully modeled and analyzed using the KENO and TSUNAMI-3D modules of the SCALE system. The model accurately simulated the behavior of different types of fuel in the reactor, and a sensitivity/uncertainty analysis was performed.
The Washington State University TRIGA reactor was modeled in the SCALE system's KENO neutron transport code. The model includes 119 fuel rods, a central boral control rod, 4 control blades, 5 irradiation ports, and 20 graphite reflector blocks within a rectangular aluminum grid box. The model accurately simulated the irradiation of depleted uranium and highly enriched uranium foils and predicted reaction rate ratios for U-238(n,2n)U-237 / U-238(n,gamma)U-239 and Mo-99 / fission, which compared favorably to empirical values previously measured at Los Alamos. Finally, a sensitivity/uncertainty analysis was performed using the continuous-energy TSUNAMI-3D module of SCALE.

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