Optimization of gap sizes for the high performance of annular nuclear fuels

Kwon, Yuri; Kwon, Soon Bum; Kim, Seong-Su; Cho, Hui-Jeong

doi:10.1007/s12206-015-0310-z

Cited by 4 publications

(2 citation statements)

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“…The physical properties applied to this analysis are adopted from 6.5500 × 10 −9 1.0412 × 10 −8 [1]. Material properties of the pellet and cladding at operating temperature are given in Tables 2 and 3, and the heat transfer coefficients can be found in [4][5][6][7]. In the thermoelasticplastic-creep analysis, we used the mathematical formula as a function of temperature obtained from experiments in an actual nuclear reactor.…”

Section: Thermal and Mechanical Materials Propertiesmentioning

confidence: 99%

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Comparison of the Characteristics of Solid Type and Annular Type Nuclear Fuels Using Thermoelastic-Plastic-Creep FEM

Kwon

Lee

Yun

2016

Mathematical Problems in Engineering

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The purpose of this study is to compare the characteristics of two types of nuclear fuel using the finite element program of thermoelastic-plastic-creep analysis. The analyzed fuel rods are of two types, solid and annular ones, and their thermomechanical characteristics are compared. Thermoelastic-plastic-creep analyses were made using an in-house finite element analysis program that adopts the “effective-stress-function” algorithm. The temperature-dependent material properties, which were obtained from the experiments for actual nuclear reactors, are adopted. The effects of type of fuel systems are revealed in both stresses and temperature distributions. The maximum tensile and compressive hoop stress of pellet and cladding are monitored to evaluate the mechanical behavior, and the maximum temperature is used to evaluate the thermal behavior. Although the annular type of fuel has certain disadvantage, it would be used very effectively or safely in future nuclear power plants.

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Section: Thermal and Mechanical Materials Propertiesmentioning

confidence: 99%

“…The recent nuclear fuels are of solid type [1,2] and are generally utilized in the pressurized water nuclear reactors. Annular types of fuel [3][4][5][6][7] have been introduced to improve the performance of nuclear power plant. Annular fuels have wider surfaces, which promote the transfer of generated heat into the cooling water.…”

Section: Introductionmentioning

confidence: 99%