2003
DOI: 10.1016/s0029-5493(03)00040-2
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Modeling of debris cooling with annular gap in the lower RPV and verification based on ALPHA experiments

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Cited by 11 publications
(10 citation statements)
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“…On the other hand, in most of the quenching tests, flow pattern is a stratified flow or an annular flow, which could be represented by C K ¼1:2 (see Fig. 14) The gap size might be circumferentially different as discussed in Fig. In the LAVA-9 experiment, however, the CCFL constant of C K ¼2:1 gave best prediction of the vessel temperature as shown in Figs.…”
Section: Discussionmentioning
confidence: 96%
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“…On the other hand, in most of the quenching tests, flow pattern is a stratified flow or an annular flow, which could be represented by C K ¼1:2 (see Fig. 14) The gap size might be circumferentially different as discussed in Fig. In the LAVA-9 experiment, however, the CCFL constant of C K ¼2:1 gave best prediction of the vessel temperature as shown in Figs.…”
Section: Discussionmentioning
confidence: 96%
“…14) In the calculation of the crust thickness, the heat transfer rates from the molten debris to each crust are simply assumed to be proportional to the heat transfer rate on the crust surface. The heat flux from the upper crust to the saturated water in the RPV lower head q UC is calculated using the thermal resistances of the upper crust and its surface, which consists of radiation and boiling.…”
Section: Heat Transfer Equationsmentioning
confidence: 99%
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“…During solidification of the debris, its average temperature is constant and the crust thickness is a function of time. 14) In the calculation of the crust thickness, the heat transfer rates from the molten debris to each crust are simply assumed to be proportional to the heat transfer rate on the crust surface. The heat balance of the RPV is expressed by the equation:…”
Section: Heat Transfer Equationsmentioning
confidence: 99%
“…Therefore, using the data, the authors derived correlations for the average CHF restricted by countercurrent flow limitation (CCFL) and local boiling heat fluxes. 11,12) Using the derived correlations, the authors 13,14) conducted simple calculations for the ALPHA/IDC001 experiment 15) performed at Japan Atomic Energy Research Institute (JAERI) and compared the calculated values with the measured values. In order to validate and improve the heat transfer models for the narrow gap, however, quenching experiments from high superheats were required because most of the previous heat transfer experi-ments with narrow gaps were conducted at low superheats and applicability to high superheats was not clearly examined.…”
Section: Introductionmentioning
confidence: 99%