Numerical simulation of fluid dynamics and mixing in headers of sodium-air heat exchangers

Smetanin, T. R.; Pakholkov, V. V.; Rogozhkin, S. A.; Shepelev, S. F.; Рогожкин, Сергей Васильевич

Publication:
Numerical simulation of fluid dynamics and mixing in headers of sodium-air heat exchangers

creativeworkseries.issn	2452-3038
dc.contributor.author	Smetanin, T. R.
dc.contributor.author	Pakholkov, V. V.
dc.contributor.author	Rogozhkin, S. A.
dc.contributor.author	Shepelev, S. F.
dc.contributor.author	Рогожкин, Сергей Васильевич
dc.date.accessioned	2024-09-18T12:06:38Z
dc.date.available	2024-09-18T12:06:38Z
dc.date.issued	2024
dc.description.abstract	The paper presents the results of a numerical simulation for sodium fluid dynamics and mixing in the tubing system of an air-cooled heat exchanger (AHX), which is a part of the emergency cooldown system (ECS) of sodium fast reactors (SFRs). Non-uniform sodium flows in the AHX tubing system may lead to the mixing of different-temperature sodium flows, temperature fluctuations and tube breaks. It was found in the course of investigating accidents involving breaks in the PFR and Phénix reactor AHX tubing systems that the failure was caused by the metal temperature fluctuations (Cruickshank and Judd 2005). The numerical simulation used three- and one-dimensional computer codes. It has been found that the calculations of the AHX sodium flow rate distribution with a practically acceptable accuracy can be performed using a one-dimensional code. The factors that influence the non-uniform distribution of sodium flows in the AHX tubing system have been analyzed. Calculations have been performed for the AHX sodium flow distributions and for the mixing of different-temperature sodium flows in the AHX outlet header. The results are presented from calculating the amplitude of sodium fluctuations near the AHX header walls. The effect from shutting down several modules on the non-uniform flow distribution and temperature fluctuations in the AHX has been investigated. Approximations of numerical solutions have been obtained for the sodium flow distribution as a function of the number of the modules shut down.
dc.identifier.citation	Smetanin TR, Pakholkov VV, Rogozhkin SA, Shepelev SF (2024) Numerical simulation of fluid dynamics and mixing in headers of sodium-air heat exchangers. Nuclear Energy and Technology 10(1): 27-32. https://doi.org/10.3897/nucet.10.122352
dc.identifier.doi	10.3897/nucet.10.122352
dc.identifier.issn	2452-3038
dc.identifier.uri	https://nucet.pensoft.net/article/122352/list/9/
dc.identifier.uri	https://openrepository.mephi.ru/handle/123456789/14928
dc.relation.ispartof	Nuclear Energy and Technology
dc.subject	CFD
dc.subject	Mixing
dc.subject	Sodium
dc.subject	AHX
dc.subject	BN reactors
dc.subject	Pulsations
dc.subject	Hydrodynamics
dc.subject	Unevenness
dc.subject	Leaks
dc.title	Numerical simulation of fluid dynamics and mixing in headers of sodium-air heat exchangers
dc.type	journal-article
dspace.entity.type	Publication
journal.title	Nuclear Energy and Technology (NUCET)
journalvolume.identifier.name	Nuclear Energy and Technology
oaire.citation.issue	1
oaire.citation.volume	10
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