Development of fuel rod behavior analysis code and its application to supercritical CO2 cooled nuclear reactor

Zhang, Kun; Yang, Tairan; Liao, Haoyu; Xie, Xiangdong; Chen, R.H.; Tian, Wenxi; Su, G.H.; Qiu, Suizheng

doi:10.1016/j.anucene.2021.108618

Cited by 8 publications

(1 citation statement)

References 16 publications

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“…The development of a nuclear reactor cooled with supercritical carbon dioxide (S-CO 2 ) has become an important topic in recent years and has attracted much attention [1,2]. Compared with the traditional steam cycle and conventional reactor, S-CO 2 has the advantages of high energy conversion efficiency, centralized piping, high space utilization, and better safety [3].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Alumina-Forming Austenitic Steel in Supercritical Carbon Dioxide Conditions: Effects of Nb Content and Temperature

Ma¹,

Cong

Chen³

et al. 2023

Materials

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The corrosion behavior of alumina-forming austenitic (AFA) stainless steels with different Nb additions in a supercritical carbon dioxide environment at 500 °C, 600 °C, and 20 MPa was investigated. The steels with low Nb content were found to have a novel structure with a double oxide as an outer Cr2O3 oxide film and an inner Al2O3 oxide layer with discontinuous Fe-rich spinels on the outer surface and a transition layer consisting of Cr spinels and γ’-Ni3Al phases randomly distributed under the oxide layer. Oxidation resistance was improved by accelerating diffusion through refined grain boundaries after the addition of 0.6 wt.% Nb. However, the corrosion resistance decreased significantly at higher Nb content due to the formation of continuous thick outer Fe-rich nodules on the surface and an internal oxide zone, and Fe2(Mo, Nb) laves phases were also detected, which prevented the outward diffusion of Al ions and promoted the formation of cracks within the oxide layer, resulting in unfavorable effects on oxidation. After exposure at 500 °C, fewer spinels and thinner oxide scales were found. The specific mechanism was discussed.

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Section: Introductionmentioning

confidence: 99%