Neutronic and Thermalhydraulic Evaluation of Annular Fuel in PWR with Three Different Nanofluids
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Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Sakarya University
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In pressurized nuclear reactors, one of the fuel design principles is the fuel centerline temperature limit. Since the thermal conductivity of UO2 is not high, the temperature increases rapidly from the fuel surface to the fuel center. To overcome this limitation, the use of annular type fuels instead of solid fuels is one of the improvement efforts. In this study, the effects of using annular fuel in a typical PWR are investigated. At the same time, the effects of adding nanoparticles (Al2O3, Cu and TiO2-with volume fractions of 0 < ϕ < 0.2 for neutronic and 0 < ϕ < 0.03 for thermalhydraulic calculations) and to the coolant water in the case of solid and annular fuels are also investigated. For both cases, neutronic and thermalhydraulic calculations are made and compared. In neutronic point of view, it has been shown that the use of annular fuel does not cause a significant change in the keff value but the presence of nanoparticles reduces the keff. This reduction is maximum for Cu+water and minimum for Al2O3+water nanofluids. In thermalhydraulic point of view, it has been shown that the annular fuel positively affects the fuel temperature limits and the addition of nanoparticles could provide an additional contribution to this, provided that it is in very small amounts (ϕ < 0.01). Among the three nanoparticles examined, Cu+water is found to be the least suitable both in terms of neutronics and termalhydraulic considerations. TiO2+water and Al2O3+water are comparable. It has also been shown that the optimum value for the annular fuel inner radius is approximately 0.4 cm. © 2022, Sakarya University. All rights reserved.
Açıklama
Anahtar Kelimeler
Annular fuel, Monte Carlo method, nanofluid, termalhydraulics
Kaynak
Sakarya University Journal of Science
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
26
Sayı
4
