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Title: Thermal Interaction Between Molten Metal and Sodium: Examination of the Fragmentation Mechanism of Molten Jet

Abstract

In order to clarify the mechanism of thermal fragmentation of a molten jet dropped into a sodium pool at instantaneous contact interface temperatures below its freezing point, a basic experiment was carried out using molten copper and sodium. Copper was melted in a crucible with an electrical heater and was dropped through a short nozzle into a sodium pool, in the form of a jet column. Thermal fragmentation originating inside the molten copper jet with a solid crust was clearly observed in all runs. It is verified that a small quantity of sodium, which is locally entrained inside the molten jet due to the organized motion between the molten jet and sodium, is vaporized by the sensible heat and the latent heat of molten copper, and the high internal pressure causes the molten jet with a solid crust to fragment. It is also concluded that the thermal fragmentation is more dominant than the hydrodynamic fragmentation, in the present range of Weber number and superheating of molten jet. Furthermore, it can be explained that the thermal fragmentation caused by the molten copper jet - sodium interaction is severer than that caused by the molten uranium alloy jet - sodium interaction, whichmore » was reported by Gabor et al., because the latent heat and the thermal diffusivity of molten copper, which are the physical properties that dominate the degree of fragmentation, are much higher than those of molten uranium alloy jets. (authors)« less

Authors:
; ;  [1]; ;  [2]
  1. Central Research Institute of Electric Power Industry - CRIEPI (Japan)
  2. Hokkaido University, North Ward, Sapporo 060-8628 (Japan)
Publication Date:
Research Org.:
The ASME Foundation, Inc., Three Park Avenue, New York, NY 10016-5990 (United States)
OSTI Identifier:
21072907
Resource Type:
Conference
Resource Relation:
Conference: ICONE-10: 10. international conference on nuclear engineering, Arlington - Virginia (United States), 14-18 Apr 2002; Other Information: Country of input: France
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER; CRUCIBLES; FRAGMENTATION; HEAT; HEATERS; INTERFACES; JETS; MELTING POINTS; NOZZLES; SODIUM; SOLIDS; SUPERHEATING; THERMAL COLUMNS; THERMAL DIFFUSIVITY; URANIUM ALLOYS

Citation Formats

Nishimura, Satoshi, Kinshita, Izumi, Ueda, Nobuyuki, Sugiyama, Ken-ichiro, and Okada, Ryohei. Thermal Interaction Between Molten Metal and Sodium: Examination of the Fragmentation Mechanism of Molten Jet. United States: N. p., 2002. Web.
Nishimura, Satoshi, Kinshita, Izumi, Ueda, Nobuyuki, Sugiyama, Ken-ichiro, & Okada, Ryohei. Thermal Interaction Between Molten Metal and Sodium: Examination of the Fragmentation Mechanism of Molten Jet. United States.
Nishimura, Satoshi, Kinshita, Izumi, Ueda, Nobuyuki, Sugiyama, Ken-ichiro, and Okada, Ryohei. 2002. "Thermal Interaction Between Molten Metal and Sodium: Examination of the Fragmentation Mechanism of Molten Jet". United States.
@article{osti_21072907,
title = {Thermal Interaction Between Molten Metal and Sodium: Examination of the Fragmentation Mechanism of Molten Jet},
author = {Nishimura, Satoshi and Kinshita, Izumi and Ueda, Nobuyuki and Sugiyama, Ken-ichiro and Okada, Ryohei},
abstractNote = {In order to clarify the mechanism of thermal fragmentation of a molten jet dropped into a sodium pool at instantaneous contact interface temperatures below its freezing point, a basic experiment was carried out using molten copper and sodium. Copper was melted in a crucible with an electrical heater and was dropped through a short nozzle into a sodium pool, in the form of a jet column. Thermal fragmentation originating inside the molten copper jet with a solid crust was clearly observed in all runs. It is verified that a small quantity of sodium, which is locally entrained inside the molten jet due to the organized motion between the molten jet and sodium, is vaporized by the sensible heat and the latent heat of molten copper, and the high internal pressure causes the molten jet with a solid crust to fragment. It is also concluded that the thermal fragmentation is more dominant than the hydrodynamic fragmentation, in the present range of Weber number and superheating of molten jet. Furthermore, it can be explained that the thermal fragmentation caused by the molten copper jet - sodium interaction is severer than that caused by the molten uranium alloy jet - sodium interaction, which was reported by Gabor et al., because the latent heat and the thermal diffusivity of molten copper, which are the physical properties that dominate the degree of fragmentation, are much higher than those of molten uranium alloy jets. (authors)},
doi = {},
url = {https://www.osti.gov/biblio/21072907}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jul 01 00:00:00 EDT 2002},
month = {Mon Jul 01 00:00:00 EDT 2002}
}

Conference:
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