Modeling and analysis of low heat flux natural convection sodium boiling in LMFBRs

Technical Report · Wed Sep 01 04:00:00 EDT 1982

DOI:https://doi.org/10.2172/5341469· OSTI ID:5341469

Khatib-Rahbar, M; Cazzoli, E G

Flow excursion induced dryout at low heat flux natural convection boiling, typical of liquid metal fast breeder reactor, is addressed. Steady state calculations indicate that low quality boiling is possible up to the point of Ledinegg instability leading to flow excursion and subsequent dryout in agreement with experimental data. A flow regime-dependent dryout heat flux relationship based upon saturated boiling criterion is also presented. Transient analysis indicates that premature flow excursion can not be ruled out and sodium boiling is highly transient dependent. Analysis of a high heat flux forced convection, loss-of-flow transient shows a significantly faster flow excursion leading to dryout in excellent agreement with parallel calculations using the two-dimensional THORAX code. 31 refs., 25 figs., 6 tabs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5341469
• Report Number(s): NUREG/CR-2006; BNL-NUREG-51541; ON: TI83010683
• Country of Publication: United States
• Language: English

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ACCIDENTS
ALKALI METALS
BOILING
BREEDER REACTORS
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LOSS OF COOLANT
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICS
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NATURAL CONVECTION
PHASE TRANSFORMATIONS
REACTOR ACCIDENTS
REACTOR COMPONENTS
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SIMULATION
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