2026-10-19T01:56:31Zhttps://ebyu-rdlopen.rawdatalibrary.net/oai/requestoai:ebyu-rdlopen.rawdatalibrary.net:ebyu/110812026-10-18T20:39:20Zopenairedrivercom_ebyu_10000col_ebyu_10001Exploring thermal flow dynamics in pressurized water reactors using hybrid graphene nanoplatelet coolantsUzun, SinemGenç, YasinAcır, Ademcriticalitygraphene nanoplateletshybrid nanoparticlesnuclear reactor coolantNanoclayNanofluidicsNucleate boilingReactor refuelingSiO2 nanoparticlesFlow dynamicsHybrid nanofluidHybrid nanoparticleNanofluidsNanoparticle ratioSiO 2Thermal flowsPressurized water reactorsThis study investigates the impact of hybrid nanoparticles on the temperature of nuclear reactor coolant, with a focus on graphene nanoplatelet (GNP)-based hybrid nanoparticles. Sixteen different hybrid nanofluids were analyzed, and their performance was compared with a standard water-based coolant. The criticality values were obtained through MCNP modeling, revealing that higher nanoparticle ratios led to increased criticality, with the highest value of 1.3239 observed in GNP-Fe3O4 + Al2O3 nanofluids (0.05 wt%) and the lowest value of 1.2935 in GNP–Fe3O4 + SiO2 nanofluids (0.001 wt%). Temperature variations showed that increasing nanoparticle concentrations resulted in slightly higher temperatures, with a maximum of 611.97 K for 0.05 vol.% GNP nanoparticles. Additionally, the departure from nucleate boiling ratio values were consistently above the safety threshold of 2.08, with the lowest value of 3.657 for GNP–Fe3O4 + SiO2 nanofluids (0.05 vol.%). These findings suggest that hybrid nanofluids, particularly those with higher nanoparticle ratios, can enhance the thermal performance and safety margins of nuclear reactor coolants, offering a promising avenue for future research and application. © 2024 The Author(s). Energy Science & Engineering published by Society of Chemical Industry and John Wiley & Sons Ltd.John Wiley and Sons Ltd2024Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/11081https://doi.org/10.1002/ese3.18802050-0505enEnergy Science and Engineeringinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/11081