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RESEARCH PAPERS

An Exact Solution for Flow Transients in Two-Phase Systems by the Method of Characteristics

[+] Author and Article Information
J. M. Gonzalez-Santalo, R. T. Lahey

Core Development—APED, General Electric Co., San Jose, Calif.

J. Heat Transfer 95(4), 470-476 (Nov 01, 1973) (7 pages) doi:10.1115/1.3450091 History: Revised February 16, 1972; Received August 17, 1972; Online August 11, 2010

Abstract

One of the important design considerations in modern water-cooled nuclear reactors is their thermal performance during hypothetical accident situations. However, an accurate analysis of the system thermal-hydraulics is required before the thermal margins can be appraised. In this paper, an analysis based on the method of characteristics has been developed by which the exact solution to flow decay transients in homogeneous two-phase systems can be obtained. The exact solution presented yields the system flow and quality at each point in space and time during an exponential flow decay transient. These parameters can then be combined with an appropriate CHF correlation to predict the occurrence of transient CHF.

Copyright © 1973 by ASME
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