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Title: Thermal Interaction Between Molten Metal Jet and Sodium Pool: Effect of Principal Factors Governing Fragmentation of the Jet

Abstract

To clarify the effects of the principal factors that govern the thermal fragmentation of a molten metallic fuel jet in the course of fuel-coolant interaction, which is important in evaluating the sequence of core disruptive accidents (CDAs) for metallic fuel fast reactors, basic experiments were carried out using molten metallic fuel simulants (copper and silver) and a sodium pool.Fragmentation of a molten metal jet with a solid crust was caused by internal pressure produced by the boiling of sodium, which is locally entrapped inside the jet due to hydrodynamic motion between the jet and the coolant. The superheating and the latent heat of fusion of the jet are the principal factors governing this type of thermal fragmentation. On the other hand, the effect of the initial sodium temperature is regarded as negligible in the case of thermal conditions expected to result in CDAs for practical metallic fuel cores. Based on the fragmentation data for several kinds of jets (Cu, Ag, SUS, U, and U-5 wt% Zr alloy), an empirical correlation is proposed that is applicable to the calculation of a mass median diameter of fragments produced by the thermal fragmentation of the jet with a solid crust under low ambientmore » Weber number conditions.« less

Authors:
 [1];  [1];  [2];  [1]
  1. Central Research Institute of Electric Power Industry (CRIEPI) (Japan)
  2. Hokkaido University (Japan)
Publication Date:
OSTI Identifier:
20840240
Resource Type:
Journal Article
Journal Name:
Nuclear Technology
Additional Journal Information:
Journal Volume: 149; Journal Issue: 2; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0029-5450
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; ALLOYS; BOILING; COOLANTS; COPPER; FAST REACTORS; FRAGMENTATION; FUEL-COOLANT INTERACTIONS; FUSION HEAT; JETS; NUCLEAR FUELS; PONDS; REACTOR CORE DISRUPTION; SILVER; SODIUM

Citation Formats

Nishimura, Satoshi, Kinoshita, Izumi, Sugiyama, Ken-Ichiro, and Ueda, Nobuyuki. Thermal Interaction Between Molten Metal Jet and Sodium Pool: Effect of Principal Factors Governing Fragmentation of the Jet. United States: N. p., 2005. Web.
Nishimura, Satoshi, Kinoshita, Izumi, Sugiyama, Ken-Ichiro, & Ueda, Nobuyuki. Thermal Interaction Between Molten Metal Jet and Sodium Pool: Effect of Principal Factors Governing Fragmentation of the Jet. United States.
Nishimura, Satoshi, Kinoshita, Izumi, Sugiyama, Ken-Ichiro, and Ueda, Nobuyuki. Tue . "Thermal Interaction Between Molten Metal Jet and Sodium Pool: Effect of Principal Factors Governing Fragmentation of the Jet". United States.
@article{osti_20840240,
title = {Thermal Interaction Between Molten Metal Jet and Sodium Pool: Effect of Principal Factors Governing Fragmentation of the Jet},
author = {Nishimura, Satoshi and Kinoshita, Izumi and Sugiyama, Ken-Ichiro and Ueda, Nobuyuki},
abstractNote = {To clarify the effects of the principal factors that govern the thermal fragmentation of a molten metallic fuel jet in the course of fuel-coolant interaction, which is important in evaluating the sequence of core disruptive accidents (CDAs) for metallic fuel fast reactors, basic experiments were carried out using molten metallic fuel simulants (copper and silver) and a sodium pool.Fragmentation of a molten metal jet with a solid crust was caused by internal pressure produced by the boiling of sodium, which is locally entrapped inside the jet due to hydrodynamic motion between the jet and the coolant. The superheating and the latent heat of fusion of the jet are the principal factors governing this type of thermal fragmentation. On the other hand, the effect of the initial sodium temperature is regarded as negligible in the case of thermal conditions expected to result in CDAs for practical metallic fuel cores. Based on the fragmentation data for several kinds of jets (Cu, Ag, SUS, U, and U-5 wt% Zr alloy), an empirical correlation is proposed that is applicable to the calculation of a mass median diameter of fragments produced by the thermal fragmentation of the jet with a solid crust under low ambient Weber number conditions.},
doi = {},
journal = {Nuclear Technology},
issn = {0029-5450},
number = 2,
volume = 149,
place = {United States},
year = {2005},
month = {2}
}