Investigates core performance using accident-tolerant fuel in nuclear reactors, suggesting enhanced safety benefits.
Recent advancements in accident-tolerant fuel (ATF) technology aim to enhance the safety and performance of commercial nuclear reactors, specifically within the APR-1400 model used in Korea. This study investigates the application of metallic microcell UO2-Mo pellets, designed to improve thermal conductivity, combined with chromium-based cladding for enhanced resistance to high-temperature oxidation and corrosion. By using the STREAM/RAST-K 2.0 two-step code system, we examine the effects of Mo on core performance, fuel cycle length, and neutronic behavior, comparing ATF against traditional UO2 fuel assemblies. Additionally, a comprehensive analysis of rod ejection accidents is performed using accident-tolerant control rods, with a focus on understanding the potential safety benefits of ATF in mitigating reactivity transients. The results provide valuable insights into the viability of ATF in improving operational safety margins and extending fuel cycle length, ultimately supporting the safe and efficient operation of next-generation nuclear reactors.
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Jeong et al. (2026) studied this question.
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