The first results from the ACOPO experiment

Theofanous, T.G.; Maguire, Michael Christopher; Angelini, S.; Salmassi, T.

doi:10.1016/s0029-5493(97)00023-x

Cited by 105 publications

(16 citation statements)

References 2 publications

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“…The BALI 4) experiments were conducted in a full-scale slice facility with water as simulant. The Mini-ACOPO experiments were transformed into ACOPO 5) experiment, employing a one-half scale three-dimensional (3D) representation of the lower head. The UCLA 6) experiments were conducted in pyrex bell jars, using Freon-113 as simulant.…”

Section: Introductionmentioning

confidence: 99%

Natural Convection Heat Transfer in Two-Dimensional Semicircular Slice Pool

Lee

Suh

2003

Journal of Nuclear Science and Technology

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This paper presents results from the Mini-SIGMA (Simulation of Internal Gravity-driven Melt Accumulation) tests concerned with high Rayleigh number turbulent natural convection in a molten pool. Tests are conducted to check on functionality of a custom-designed heater and to obtain correlations in terms of the Rayleigh and Nusselt numbers. The internal heating method is adopted in the tests utilizing the cable-type heater. This study concentrates on the thermal load, angular heat flux distribution, and temperature distribution inside the molten pool. The test section is a twodimensional slice whose diameter, height, and thickness are 250 mm, 125 mm, and 50 mm, respectively. The pool's curved wall, with a 23 mm thick copper plate, is cooled by a regulated water loop. A water-cooling system is used to maintain the temperature of water surrounding the test section as constant as practicable with time. Four thin cable-type heaters, each with a diameter of 2.4 mm and a length of 900 mm, are used to simulate internal heating in the pool. They are uniformly distributed in the semicircular section to supply a maximum of 1 kW power to the pool. The Rayleigh number is obtained from these test data up to 10 10 .

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Section: Introductionmentioning

confidence: 99%

Natural Convection Heat Transfer in Two-Dimensional Semicircular Slice Pool

Lee

Suh

2003

Journal of Nuclear Science and Technology

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“…In fact, Equation (9) appears to be a better fit to the data. In Figure (7), although the data are bounded by Equation (10) and Equation (8). Therefore, there appears to be no advantage of using Equation (10) over Equations (8) or (9).…”

Section: Natural Convection In a Pool With Internal Heat Generationmentioning

confidence: 98%

“…In Figure (7), although the data are bounded by Equation (10) and Equation (8). Therefore, there appears to be no advantage of using Equation (10) over Equations (8) or (9). Based on these observations, Equation (10) will not be used for our analysis.…”

Section: Natural Convection In a Pool With Internal Heat Generationmentioning

confidence: 98%

A Heat Transfer Model for a Stratified Corium-Metal Pool in the Lower Plenum of a Nuclear Reactor

Sohal¹,

Siefken²

1999

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This preliminary design report describes a model for heat transfer in a coriummetal stratified pool. It was decided to make use the existing COUPLE model. Currently available correlations for natural convection heat transfer in a pool with and without internal heat generation were obtained. The appropriate correlations will be incorporated in the existing COUPLE model. Heat conduction and solidification modeling will be done with existing algorithms in the COUPLE. Assessment of the new model will be done by simple energy conservation problems. Comparison of Equation (10) Comparison of Equation (10) EXECUTIVE SUMMARYThe objective of this design report is to develop a model for heat transfer in stratified corium and metal pools in a nuclear reactor lower head formed as a result of severe accident. Natural convection heat transfer correlations in pools with and without internal heat generation were obtained from existing literature. It was decided to make use of the existing COUPLE model and its algorithm to reduce the coding cost. The appropriate correlations will be incorporated in the COUPLE model. Heat conduction and solidification modeling will be done with existing algorithms in the COUPLE. The new model will be assessed by energy conservation and other simple test problems, because no exact experimental data are available.1

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“…A comparison has been performed of the heat transfer coefficient deduced from ARTEMIS 11 with ones derived from heat transfer correlations existing in literature for natural convection by Mayinger (Mayinger et al, 1976), ACOPO and Mini-ACOPO correlations (Theofanous et al, 1997), BALI correlation (Bonnet and Seiler, 1999) and gas-liquid convection correlations by Greene et al (1980), Gabor et al (1979), Gustavson et al (1977), and Chawla and Chan (1982) . Fig.…”

Section: Void Fraction Measurement and Heat Transfermentioning

confidence: 99%