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Title: Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics

Abstract

The limitation of gas-liquid counter-current flow is important for getting coolant to the core preventing heat-up. To illustrate the scaling dependence of counter-current flow in the downcomer, the upper core tie plate and the hot leg, some results are presented. Based on a derivation of the counter-current flow equations for vertical and horizontal flows, the scaling ability of existing correlations is shown for homogeneous vertical counter-current flow (Kutateladze-type equation) and separated horizontal flow in the hot leg during reflux-condenser conditions (Wallis equation). The large reactor scale heterogeneous counter-current flow in the downcomer and at the upper core tie-plate needed an extension of the Kutateladze-type equation. Finally, Bankoff suggested that for CCFL in perforated plates such as upper tie plate, a parameter that is a combination of actual length scale (Wallis parameter) and Laplace constant (Kutateladze parameter) will be required.

Authors:
 [1];  [2]
  1. Consultant (Germany)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22)
OSTI Identifier:
1547288
Report Number(s):
BNL-211926-2019-JAAM
Journal ID: ISSN 0029-5493
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Engineering and Design
Additional Journal Information:
Journal Volume: 354; Journal Issue: C; Journal ID: ISSN 0029-5493
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Vertical homogeneous counter-current flow; vertical heterogeneous horizontal counter-current flow; horizontal separated counter-current flow; core bypass; emergency core cooling; scaling effects

Citation Formats

Glaeser, Horst, and Rohatgi, Upendra Singh. Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics. United States: N. p., 2019. Web. doi:10.1016/j.nucengdes.2019.110226.
Glaeser, Horst, & Rohatgi, Upendra Singh. Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics. United States. doi:10.1016/j.nucengdes.2019.110226.
Glaeser, Horst, and Rohatgi, Upendra Singh. Sun . "Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics". United States. doi:10.1016/j.nucengdes.2019.110226.
@article{osti_1547288,
title = {Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics},
author = {Glaeser, Horst and Rohatgi, Upendra Singh},
abstractNote = {The limitation of gas-liquid counter-current flow is important for getting coolant to the core preventing heat-up. To illustrate the scaling dependence of counter-current flow in the downcomer, the upper core tie plate and the hot leg, some results are presented. Based on a derivation of the counter-current flow equations for vertical and horizontal flows, the scaling ability of existing correlations is shown for homogeneous vertical counter-current flow (Kutateladze-type equation) and separated horizontal flow in the hot leg during reflux-condenser conditions (Wallis equation). The large reactor scale heterogeneous counter-current flow in the downcomer and at the upper core tie-plate needed an extension of the Kutateladze-type equation. Finally, Bankoff suggested that for CCFL in perforated plates such as upper tie plate, a parameter that is a combination of actual length scale (Wallis parameter) and Laplace constant (Kutateladze parameter) will be required.},
doi = {10.1016/j.nucengdes.2019.110226},
journal = {Nuclear Engineering and Design},
number = C,
volume = 354,
place = {United States},
year = {2019},
month = {12}
}

Journal Article:
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This content will become publicly available on December 1, 2020
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