Experimental studies on critical heat flux in vertical tight 37-rod bundles using freon-12

2005 ◽  
Vol 31 (10-11) ◽  
pp. 1198-1219 ◽  
Author(s):  
X. Cheng
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Experimental Studies ◽  
Rod Bundles

Experimental Studies on Critical Heat Flux in Tight Lattice Rod Bundles

2014 ◽  
Author(s):  
Xuemei Lang ◽  
Houjun Gong ◽  
Lei Zhou ◽  
Feng Xie ◽  
Ye Liu
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Experimental Studies ◽  
Helix Angle ◽  
Pressurized Water Reactors ◽  
Experimental Investigations ◽  
Rod Bundles ◽  
Pressurized Water ◽  
Water Reactors ◽  
Tight Lattice

The tight fuel lattice of pressurized water reactors (PWR) is helped to reduce the volume ratio of water-uranium, to increase the conversion ratio, to decrease the volume of core. It is especially useful for very high burnup and high volume power flux. The design of tight-lattice pressurized water reactors requires the knowledge of critical heat flux (CHF) in tight rod bundles. The tight hexagonal 19-rod bundles is used in this test. There are 4 wires wrapped in outside wall of each rod to support and locate. Experimental investigations on CHF behavior in the two kind bundles of helix angle 3° and 5° were performed. The CHF data points have been obtained in a range of parameters: pressure 8.0–16.6 MPa, mass flux 164.6–3283.0 kg/m2s and bundle exit steam quality −0.315 to 0.747. It is found that the CHF value of helix angle 5° bundle was more higher than that of helix angle 3° bundle in the same T/H condition. The effect of different parameters on CHF in the tight rod bundle is similar to that in the open literature. The CHF correlations of helix angle 5° bundle was obtained based on the test data.

A Theoretical Critical Heat Flux Model for Rod Bundles Under Pressurized Water Reactor Conditions

1989 ◽  
Vol 85 (2) ◽  
pp. 213-226 ◽  
Author(s):  
Wen-Shan Lin ◽  
Bau-Shei Pei ◽  
Chien-Hsiung Lee ◽  
I. A. Mudawwar
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Pressurized Water Reactor ◽  
Rod Bundles ◽  
Pressurized Water ◽  
Water Reactor ◽  
Flux Model ◽  
Heat Flux Model

Calculation of critical heat flux in rod bundles with local turbulators

1983 ◽  
Vol 54 (6) ◽  
pp. 400-405
Author(s):  
V. K. Ivanov ◽  
L. L. Kobzar'
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Rod Bundles

Critical Heat Flux in Square- and Nonsquare-Array Rod Bundles for Advanced Light Water Reactors

2007 ◽  
Vol 158 (2) ◽  
pp. 219-228 ◽  
Author(s):  
Dae-Hyun Hwang ◽  
Kyong-Won Seo ◽  
Chung-Chan Lee
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Light Water Reactors ◽  
Rod Bundles ◽  
Light Water ◽  
Water Reactors

Research on Processing of Signals and Images of Critical Heat Flux in Natural Circulation Based on Wavelet Transform and Edge Detection

2011 ◽  
Vol 105-107 ◽  
pp. 2000-2004
Author(s):  
Cheng Sheng ◽  
Tao Zhou ◽  
De Xun Hong
Keyword(s):  
Heat Flux ◽  
Fourier Transform ◽  
Wavelet Transform ◽  
Edge Detection ◽  
Critical Heat Flux ◽  
Natural Circulation ◽  
Experimental Studies ◽  
Detection Technology ◽  
Temperature Signal ◽  
Dry Patch

Based on the experimental data acquired from natural circulation experiment, critical heat flux (CHF) was detected through applying Fourier transform and wavelet transform firstly. Then, the technology of edge detection was applied in detecting CHF regions under different heating powers from the photos which were taken in experiment. Results showed that wavelet transform could detect the occurrence of CHF much more accurate than Fourier transform. The apply of wavelet transform using of db1 wavelet and edge detection technology using of Canny algorithm could accurately distinguish the singularity of CHF in one-dimensional temperature signal and dry patch regions that represented CHF phenomena in two-dimensional photographs respectively, which can provide a new approach in the analysis of CHF experimental studies of natural circulation.

Critical Heat Flux Predictions in Rod Bundles

1983 ◽  
Vol 60 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Shih-Ping Kao ◽  
Mujid S. Kazimi
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Rod Bundles
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