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Title: Two-phase interactions in countercurrent flow. Annual technical report, 1 November 1977-31 December 1978

Abstract

The flow of thin films occurs in a variety of situations in the course of a loss of coolant accident. These can include flow in the annular downcomer during injection of emergency core cooling water, flow along the fuel rods in the course of the flowdown, and flow along the fuel rods as a result of upper head injection. This report summarizes research completed during the period November 1977 to October 1978 on related problems. (1) The flooding process, (2) motion and size of drops during upward annular flow, and (3) interfacial structure and momentum interactions for upward film flow. (1) Generalized solutions of the film flow equations are obtained which demonstrate the variety of possible mechanisms for flooding. The possibility that the physical condition which exists oscillates between one or more of these states is explored. (2) A new optical technique is presented for simultaneous measurement of drop size as well as radial and axial velocity in the presence of a liquid film. (3) Experimental data are reported for upward film flow in an air-water system. Included are entrainment and film rates, pressure drop and film structure data. The results are interpreted in terms of wall and interfacial shearmore » stress and friction factors.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Houston Univ., TX (USA). Dept. of Chemical Engineering
OSTI Identifier:
5811761
Alternate Identifier(s):
OSTI ID: 5811761
Report Number(s):
PB-292780
DOE Contract Number:  
AT(49-24)0194
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; LOSS OF COOLANT; TWO-PHASE FLOW; PWR TYPE REACTORS; CORE FLOODING SYSTEMS; FLOW RATE; LIQUID FLOW; MATHEMATICAL MODELS; ACCIDENTS; ECCS; ENGINEERED SAFETY SYSTEMS; FLUID FLOW; REACTOR ACCIDENTS; REACTOR PROTECTION SYSTEMS; REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS 220900* -- Nuclear Reactor Technology-- Reactor Safety; 210200 -- Power Reactors, Nonbreeding, Light-Water Moderated, Nonboiling Water Cooled

Citation Formats

Dukler, A.E., Chopra, A., Moalim, D., and Semiat, R. Two-phase interactions in countercurrent flow. Annual technical report, 1 November 1977-31 December 1978. United States: N. p., 1979. Web.
Dukler, A.E., Chopra, A., Moalim, D., & Semiat, R. Two-phase interactions in countercurrent flow. Annual technical report, 1 November 1977-31 December 1978. United States.
Dukler, A.E., Chopra, A., Moalim, D., and Semiat, R. Thu . "Two-phase interactions in countercurrent flow. Annual technical report, 1 November 1977-31 December 1978". United States.
@article{osti_5811761,
title = {Two-phase interactions in countercurrent flow. Annual technical report, 1 November 1977-31 December 1978},
author = {Dukler, A.E. and Chopra, A. and Moalim, D. and Semiat, R.},
abstractNote = {The flow of thin films occurs in a variety of situations in the course of a loss of coolant accident. These can include flow in the annular downcomer during injection of emergency core cooling water, flow along the fuel rods in the course of the flowdown, and flow along the fuel rods as a result of upper head injection. This report summarizes research completed during the period November 1977 to October 1978 on related problems. (1) The flooding process, (2) motion and size of drops during upward annular flow, and (3) interfacial structure and momentum interactions for upward film flow. (1) Generalized solutions of the film flow equations are obtained which demonstrate the variety of possible mechanisms for flooding. The possibility that the physical condition which exists oscillates between one or more of these states is explored. (2) A new optical technique is presented for simultaneous measurement of drop size as well as radial and axial velocity in the presence of a liquid film. (3) Experimental data are reported for upward film flow in an air-water system. Included are entrainment and film rates, pressure drop and film structure data. The results are interpreted in terms of wall and interfacial shear stress and friction factors.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {2}
}

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