Effects of UMo irradiation creep on the thermo-mechanical behavior in monolithic UMo/Al fuel plates

Feng, Yan; Jian, Xiaobin; Ding, Shurong

doi:10.1016/j.jnucmat.2019.07.006

Cited by 15 publications

(4 citation statements)

References 17 publications

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“…Except for those near the two ends, the tensile stresses can be seen and larger values appear near the locations with ∼2 mm away from the two path ends. With the increase of creep rate coefficient from 500 × 10 −22 mm 3 /(fission•MPa) to 2,000 × 10 −22 mm 3 /(fission•MPa), the maximum tensile stress on the 308 th day decreases by ∼25%, which is similar to that in Yan et al (2019). After irradiation of 231 days, the maximum tensile stress is ∼58 MPa for 500 × 10 −22 mm 3 /(fission•MPa), which is ∼34% greater than that for 2,000 × 10 −22 mm 3 /(fission•MPa).…”

Section: On the First Principal Stresses And Irradiation Creep Strainssupporting

confidence: 68%

“…The thermo-mechanical behavior analysis for monolithic U-Mo/Al fuel plates can be found in the previous works (Kim et al, 2012;Kim et al, 2013;Jian et al, 2019a). A linear relation of equivalent creep strain rate with fission rate and Von Mises stress was generally adopted, namely _ ε cr ∝ σ • _ f (Dienst, 1977;Ghoshal et al, 2013;Yan et al, 2019). Kim et al (2013); Yan et al (2019) and Jian et al, (2019b) made important contributions to the predictions of fuel creep rate effects, and the researches indicated that the fuel creep performance played an important role in the thermo-mechanical behavior of fuel plates.…”

Section: Introductionmentioning

confidence: 99%

“…A linear relation of equivalent creep strain rate with fission rate and Von Mises stress was generally adopted, namely _ ε cr ∝ σ • _ f (Dienst, 1977;Ghoshal et al, 2013;Yan et al, 2019). Kim et al (2013); Yan et al (2019) and Jian et al, (2019b) made important contributions to the predictions of fuel creep rate effects, and the researches indicated that the fuel creep performance played an important role in the thermo-mechanical behavior of fuel plates. It is noted that these simulations were focused on the mini fuel plates (Miller et al, 2010;.…”

Section: Introductionmentioning

confidence: 99%

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Effects of U-Mo Irradiation Creep Performance on the Thermo-Mechanical Coupling Behavior in U-Mo/Al Monolithic Fuel Assemblies

et al. 2021

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To obtain the optimized fuel performance, the effects of U-Mo irradiation creep rate coefficient on the thermo-mechanical behavior of a fuel assembly are investigated. In this study, three cases of creep rate coefficient are considered. The distribution and evolution results of temperature, displacement, stress/strain and fuel foil micro-structure are analyzed. The simulation results indicate that with the increase of creep rate coefficient 1) the temperature field in the fuel assembly changes slightly; 2) the maximum out-of-plane displacements in the side plates decrease slightly; the maximum out-of-plane displacements in the fuel plates adjacent to the outside Al plates rise distinctly, induced by the enhanced bending deformation contributions; 3) the peak values of the first principal stresses and skeleton normal stresses in the fuel foils are reduced, while the through-thickness creep strains are enlarged; 4) with an increase of fuel creep rate coefficient from 500 × 10−22 mm3/(fission MPa) to 2,000 × 10−22 mm3/(fission·MPa), the maximum Von Mises stress in the fuel cladding decreases by ∼24% on the 308th day. This work is helpful for advanced fabrication and optimization design of U-Mo/Al fuel assemblies.

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Section: On the First Principal Stresses And Irradiation Creep Strainssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of U-Mo Irradiation Creep Performance on the Thermo-Mechanical Coupling Behavior in U-Mo/Al Monolithic Fuel Assemblies

et al. 2021

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“…The existing constitutive models for swelling, elastic-plastic deformation, and creep utilized in monolithic UMo fuel performance modeling (Miller et al, 2010;Ozaltun and Rabin, 2017;Medvedev et al, 2018;Yan et al, 2019) are empirical and developed primarily by fitting experimental data Burkes and Wachs, 2010;Kim et al, 2013) and secondarily to fit the results of finite element analyses. The mechanisms of deformations such as plastic and creep deformation and the coupling of gas bubble structure, stress, and property evolution are not sufficiently considered, which limits the predictive capability of the existing models.…”

Section: Introductionmentioning

confidence: 99%

Gas Bubble Evolution in Polycrystalline UMo Fuels Under Elastic-Plastic Deformation: A Phase-Field Model With Crystal-Plasticity

Beeler

2021

Front. Mater.

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In monolithic UMo fuels, the interaction between the Al cladding and large gas bubble volumetric swelling causes both elastic-plastic and creep deformation. In this work, a phase-field model of gas bubble evolution in polycrystalline UMo under elastic-plastic deformation was developed for studying the dynamic interaction between evolving gas bubble/voids and deformation. A crystal plasticity model, which assumes that the plastic strain rate is proportional to resolved shear stresses of dislocation slip systems on their slip planes, was used to describe plastic deformation in polycrystalline UMo. Xe diffusion and gas bubble evolution are driven by the minimization of chemical and deformation energies in the phase-field model, while evolving gas bubble structure was used to update the mechanical properties in the crystal plasticity model. With the developed model, we simulated the effect of gas bubble structures (different volume fractions and internal gas pressures) on stress-strain curves and the effect of local stresses on gas bubble evolution. The results show that 1) the effective Young’s modulus and yield stress decrease with the increase of gas bubble volume fraction; 2) the hardening coefficient increases with the increase of gas bubble volume fraction, especially for gas bubbles with higher internal pressure; and 3) the pressure dependence of Xe thermodynamic and kinetic properties in addition to the local stress state determine gas bubble growth or shrinkage. The simulated results can serve as a guide to improve material property models for macroscale fuel performance modeling.

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A new method to simulate dispersion plate-type fuel assembly in a multi-physics coupled way

Xiang

Niu

et al. 2022

Annals of Nuclear Energy

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Effects of UMo irradiation creep on the thermo-mechanical behavior in monolithic UMo/Al fuel plates

Cited by 15 publications

References 17 publications

Effects of U-Mo Irradiation Creep Performance on the Thermo-Mechanical Coupling Behavior in U-Mo/Al Monolithic Fuel Assemblies

Effects of U-Mo Irradiation Creep Performance on the Thermo-Mechanical Coupling Behavior in U-Mo/Al Monolithic Fuel Assemblies

Gas Bubble Evolution in Polycrystalline UMo Fuels Under Elastic-Plastic Deformation: A Phase-Field Model With Crystal-Plasticity

A new method to simulate dispersion plate-type fuel assembly in a multi-physics coupled way

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