The development of multi-physics approach with Monte Carlo and computational fluid dynamics coupling for reactor cores

Feride Kutbay, Senem Şentürk Lüle*

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: ???type-name???Makalebilirkişi

1 Atıf (Scopus)

Özet

Highly accurate solutions for neutronic and thermal hydraulic phenomena in reactor cores certainly improve the safety conclusions about the reactors. The coupling methodology of governing physics of these two fields by using Monte Carlo and computational fluid dynamics (CFD) methods was described in this study with its application to Istanbul Technical University (ITU) TRIGA Mark II Research Reactor. As a different approach, instead of not modelling top and bottom grid plates of the reactor that is the common practice for geometrical simplification, the effect of grid plates on flow hydrodynamics was included into the conjugate heat transfer calculations as boundary conditions. The investigation on the effect of core element temperature, cross sections, and S(α,β) thermal scattering data showed the need of proper coupling of neutronic and thermal hydraulic fields since 30–45% relative error on excess reactivity value of the ITU research reactor was observed. With the developed loose coupling model, 483 individual cross section and 483 different S(α,β) thermal scattering data were generated by using NJOY nuclear data generation code and MAKSXF and OTF utilization tools of MCNP6.2 code. The reactivity loss against power increase in research reactor value of this study showed 6% relative error with loose coupling comparing to maximum 50% without coupling.

Orijinal dilİngilizce
Makale numarası112127
DergiNuclear Engineering and Design
Hacim402
DOI'lar
Yayın durumuYayınlandı - Şub 2023

Bibliyografik not

Publisher Copyright:
© 2022 Elsevier B.V.

Finansman

This work was supported by Scientific Research Projects Coordination Unit of Istanbul Technical University. Project number: MGA-2019-42258.

FinansörlerFinansör numarası
Istanbul Teknik ÜniversitesiMGA-2019-42258

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