Impact of gas in sodium flow on the temperature variation in an LMFBR rod bundle

Marten, K.; Baumgartner, Erwin; Khan, M.A.A.; Hoffmann, H.

doi:10.1016/0029-5493(84)90221-8

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“…The upper boundary of gas volume fraction has been chosen according to work [1,2]. To calculate the interphase friction coefficients, the following relation are used:…”

Section: Description Of the Models To Calculate Processes In Two-phasmentioning

confidence: 99%

“…So it is important to provide numerical and experimental investigations of the motion of bubbles in liquid metals. During the sodium boiling in core or during the leakage in steam generator slug regime is the main two-phase [1,2]. The feature of slug flow regime is the existence of sharp boundary between phases that make some difficulties to numerical simulating especially in one dimensional approximation.…”

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confidence: 99%

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Numerical simulation of gas volume motion during the gas injection into liquid metal coolant

Usov¹,

Лобанов²,

Прибатурин³

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. Detailed description of relations and numerical approaches to simulate transport of gas phase in a vertical liquid column is presented in a current paper. These approaches are important to calculate phenomena that take place during steam generator tube rapture in fast reactors with liquid metal coolant. Presented relations determine interphase friction between gas and fluid in different flow regimes of two-phase flow. It is shown that correct definition of interphase friction coefficients determines the correct value of bubble velocity that is very important to simulate two-phase flow in steam generator and reactor core. The paper also contains numerical algorithm to calculate motion of gas volume in fluid flow. Especial attention is paid to describe the algorithms for simulating two-phase flow with sharp edges between phases that are character for slug flow regime. Also some experimental results are presented in the paper. Comparison between experimental data and calculation results has been provided. IntroductionThe active studies of processes in two-phase flow of liquid metals been providing in the middle of the 20th century due to the development of project of fast reactors. Unfortunately, due to the inherent technological problems in operation with liquid metals, many countries refused to further develop this technology, with the exception of Russia, which is still developing projects for liquid metal-cooled reactors. There are projects of lead, lead-bismuth and sodium cooled reactors. Accidents caused by the steam generator tubes rupture and the coolant boiling due to insufficient of heat removal from the core is determined by the behaviour of the gaseous phase in liquid. The motion of bubbles in the core, pulsations of theirs volume strongly influence to the behaviour of the reactor due to the presence of a positive feedback between the core neutron power and the gas volume. Knowledge about the specific of gas bubble motions into liquid metal coolant is also important for metallurgy to calculate of boiling or blown steel-melting baths. There is a lack of information about the processes in two-phase liquid metal flow. So it is important to provide numerical and experimental investigations of the motion of bubbles in liquid metals. During the sodium boiling in core or during the leakage in steam generator slug regime is the main two-phase [1,2]. The feature of slug flow regime is the existence of sharp boundary between phases that make some difficulties to numerical simulating especially in one dimensional approximation.

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“…The upper boundary of gas volume fraction has been chosen according to work [1,2]. To calculate the interphase friction coefficients, the following relation are used:…”

Section: Description Of the Models To Calculate Processes In Two-phasmentioning

confidence: 99%

mentioning

confidence: 99%

Numerical simulation of gas volume motion during the gas injection into liquid metal coolant

Usov¹,

Лобанов²,

Прибатурин³

et al. 2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

Impact of gas in sodium flow on the temperature variation in an LMFBR rod bundle

Cited by 1 publication

References 1 publication

Numerical simulation of gas volume motion during the gas injection into liquid metal coolant

Numerical simulation of gas volume motion during the gas injection into liquid metal coolant

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