Modeling of corrosion-induced blockages on radiation heat transfer by using RELAP5-3D

Khatry, Jivan; Aydoğan, Fatih; Ilyas, Muhammad; Houts, Michael G.

doi:10.1016/j.pnucene.2018.12.005

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…NTP reactor designs are grouped into high-enriched uranium (HEU) and low-enriched uranium (LEU) designs according to the different enrichment of the nuclear fuel used. A few decades of the cold war between the United States and the Soviet Union had witnessed the amount of mature and effective numerical and experimental work (Belair et al, 2013;Khatry et al, 2019;Graham, 2020) on HEU design. However, recent efforts focus on designing a feasible engine that relies on LEU fuel due to its lower cost and nuclear proliferation risk (Venneri and KIM, 2015a;Venneri and KIM, 2015b;Gates et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of heat transfer characteristics of moderator assembly employed in a low-enriched uranium nuclear thermal propulsion reactor

Guan²,

Song³

et al. 2022

Front. Energy Res.

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The design of a nuclear thermal propulsion (NTP) reactor based on low-enriched uranium (LEU) requires additional moderator elements in the core to physically meet the critical requirements. This design softens the core energy spectrum and can provide more thermal neutrons for the fission reaction, but the heat transfer characteristics between the fuel and moderator assembly are more complex. Aiming at the typical LEU unit design, the heat transfer mathematical model is established using the principle of heat flow diversion and superposition. The model adopts the heat transfer relationship based on STAR-CCM+ simulation rather than the empirical expression used in the past literature to improve the applicability of the model. The heat transfer coefficients in the proposed model are evaluated under different Reynolds numbers and thermal power. The deviations between the proposed model and CFD simulation are analyzed. The results show that the calculation of the heat transfer coefficient between the proposed model and the CFD simulation maintains a good consistency, most of which are within 10%. It may provide a reliable and conservative temperature estimation model for future LEU core design.

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