Youho Lee
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View article: GIFT-1.0: Advanced light water reactor fuel performance code
GIFT-1.0: Advanced light water reactor fuel performance code Open
In response to emerging fuel technologies, such as Accident Tolerant Fuels (ATF), Small Modular Reactor (SMR) fuels, and extended spent fuel storage in the nuclear power industry, GIFT-1.0 was developed to enable full life-cycle simulation…
View article: Blast Responses of a Reinforced Concrete Slab Using the Arbitrary Lagrangian-Eulerian Method
Blast Responses of a Reinforced Concrete Slab Using the Arbitrary Lagrangian-Eulerian Method Open
Numerical simulation emerges as a highly effective method for studying the interaction between structures and blast waves.In this study, we apply a multi-material arbitrary Lagrangian-Eulerian method to explore the dynamic response of a re…
View article: Characterization of eutectic reaction of Cr and Cr/CrN coated zircaloy accident tolerant fuel cladding
Characterization of eutectic reaction of Cr and Cr/CrN coated zircaloy accident tolerant fuel cladding Open
Eutectic reactions of five kinds of Cr-coated Zr alloy cladding with different base materials (Zr–Nb–Sn alloy or Zr–Nb alloy), different coating thicknesses (6∼22.5 μm), and different coating materials (Cr single layer or Cr/CrN bilayer) w…
View article: Spent fuel simulation during dry storage via enhancement of FRAPCON-4.0: Comparison between PWR and SMR and discharge burnup effect
Spent fuel simulation during dry storage via enhancement of FRAPCON-4.0: Comparison between PWR and SMR and discharge burnup effect Open
Spent fuel behavior of dry storage was simulated in a continuous state from steady-state operation by modifying FRAPCON-4.0 to incorporate spent fuel–specific fuel behavior models. Spent fuel behavior of a typical PWR was compared with tha…
View article: Study of high burnup effect on steam oxidation of Zircaloy and its regulatory implications via the developement of a pre-transient oxide model of TRANOX
Study of high burnup effect on steam oxidation of Zircaloy and its regulatory implications via the developement of a pre-transient oxide model of TRANOX Open
A mechanisitc model that gives oxygen distribution of Zircaloy cladding with pre-transient oxide and absorbed hydrogen under steam oxidation environments has been developed. The model has been incorporated into TRANOX. The model has been v…
View article: Hydride embrittlement resistance of Zircaloy-4 and Zr-Nb alloy cladding tubes and its implications on spent fuel management
Hydride embrittlement resistance of Zircaloy-4 and Zr-Nb alloy cladding tubes and its implications on spent fuel management Open
In the spent fuel storage phase, nuclear fuel cladding is subjected to increased embrittlement owing to a large amount of hydride precipitation. This study compares the differences in the hydrogen-induced cladding embrittlement of cold wor…
View article: Temperature-dependent axial mechanical properties of Zircaloy-4 with various hydrogen amounts and hydride orientations
Temperature-dependent axial mechanical properties of Zircaloy-4 with various hydrogen amounts and hydride orientations Open
The effects of hydride amount (20–850 wppm), orientation (circumferential and radial), and temperature (room temperature, 100 °C, 200 °C) on the axial mechanical properties of Zircaloy-4 cladding were comprehensively examined. The fraction…
View article: Post-LOCA ductility of Cr-coated cladding and its embrittlement limit
Post-LOCA ductility of Cr-coated cladding and its embrittlement limit Open
Post-Loss of Coolant Accident (LOCA) ductility assessments of Cr-coated Zircaloy cladding was conducted in compliance with the United States Nuclear Regulatory Commission (U.S.NRC)’s guidelines. The Equivalent Cladding Reacted (ECR) limit …
View article: TRANOX: Model for non-isothermal steam oxidation of zircaloy cladding
TRANOX: Model for non-isothermal steam oxidation of zircaloy cladding Open
TRANOX-1.0 (TRANsient OXidation), a mechanistic model that calculates oxygen distribution for isothermal and non-isothermal transients (1000–1250 °C) has been developed. TRANOX solves radial transient diffusion equation using Finite Differ…
View article: The statistical ductility of embrittled Zircaloy-4 and its regulatory implications
The statistical ductility of embrittled Zircaloy-4 and its regulatory implications Open
The statistical nature of ductility of embrittled Zircaloy-4 cladding and its implications on the ECCS criteria (10 CFR 50.46) were investigated. Ductility of embrittled cladding specimens (ECR: 9-30%, and H: 171-1759 wppm) was measured by…