Study on Non-Uniform Axial Power Shape Correction Factor for DNBR Analysis under Return-to-Power Steam Line Break Accident

2021 ◽  
Vol 9 (2) ◽  
pp. 107-114
Author(s):  
Byeongil Jang ◽  
Kanghoon Kim
Keyword(s):  
Correction Factor ◽  
Steam Line ◽  
Shape Correction

Inner Bremsstrahlung Accompanying the Non-Unique First Forbidden β-Decay of 141Ce

1993 ◽  
Vol 48 (11) ◽  
pp. 1115-1118 ◽  
Author(s):  
E. I. Khalil
Keyword(s):  
Correction Factor ◽  
Single Channel ◽  
Experimental Results ◽  
The Other ◽  
Β Decay ◽  
Inner Bremsstrahlung ◽  
Shape Correction ◽  
Peeling Off

Abstract The inner Bremsstrahlung (I.B.) spectrum accompanying the β-decay of 141Ce (non-unique first forbidden β-transition) was measured using a single channel scintillation spectrometer. The measured I.B. was analyzed by the variable width peeling-off method. This analyzed and corrected I.B. was compared with those calculated according to the original theories of Knipp and Uhlenbeck as well as of Bloch (KUB), the coulomb corrected theories of Lewis and Ford and of Nilsson, and according to detour-transition calculations of the Ford and Martin theory. Ths shape correction factor suggested by Konopinski and Uhlenbeck on the Fermi β-decay theory was applied to the calculated I.B. based on Nilsson's theory (modified KUB theory). The experimental results are in better agreement with the modified KUB theory than the other theories.

RE-EXAMINATION OF THICKNESS-RESONANCE- FREQUENCY FORMULA FOR STRUCTURAL INTEGRITY APPRAISAL AND DAMAGE DIAGNOSIS

2012 ◽  
Vol 04 (01n02) ◽  
pp. 1250011
Author(s):  
RUICHONG ZHANG
Keyword(s):  
Data Analysis ◽  
Resonant Frequency ◽  
Correction Factor ◽  
Structural Integrity ◽  
Data Sets ◽  
Damage Diagnosis ◽  
Thickness Estimation ◽  
Hilbert Huang Transform ◽  
Time Frequency ◽  
Shape Correction

This study examines rationale of correction factor β in the formula of thickness resonant frequency, fundamental to the thickness estimation of impact-echo (IE) approach in nondestructive testing (NDT) for integrity appraisal and damage diagnosis of infrastructure systems. It shows the role of the factor in the formula from the perspective of testing equipment setup, wave propagation, and resonant frequency identification, much broader than what was first introduced empirically for shape correction of a structure under test. Emphasis is laid in wave-based interpretation of resonant frequency, typically obtained from traditional fast Fourier transform (FFT) data analysis of IE recordings. Since the FFT data analysis provides average, not true, characteristic of resonant frequency shown in the nonstationary IE recordings, it typically distorts the thickness estimation from the formula if the correction factor is not used. An adaptive time-frequency data analysis termed Hilbert–Huang transform (HHT) is then introduced to overcome the shortage of FFT analysis in identifying the resonant frequency from noise-added IE recordings. With FFT and HHT analyses of five data sets of sample IE recordings from sound and damaged concrete structures and comparison with referenced ones, this study reveals that the proposed IE approach with HHT data analysis not only eliminates the subjective use of correction factor in the formula, but it also improves greatly the accuracy in the thickness estimation.

scholarly journals Shape Correction Factor for Drying Shrinkage in a Concrete Cross-Section

CONCREEP 10 ◽  
2015 ◽  
Author(s):  
N. Reybrouck ◽  
P. Criel ◽  
R. Caspeele ◽  
L. Taerwe
Keyword(s):  
Cross Section ◽  
Correction Factor ◽  
Drying Shrinkage ◽  
Shape Correction

Performance enhancement of normal contact ratio gearing system through correction factor

2019 ◽  
Vol 13 (3) ◽  
pp. 5242-5258
Author(s):  
R. Ravivarman ◽  
K. Palaniradja ◽  
R. Prabhu Sekar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Correction Factor ◽  
Bending Strength ◽  
Performance Enhancement ◽  
Transmission Ratio ◽  
Contact Ratio ◽  
Element Analysis ◽  
Normal Contact ◽  
Root Region

As lined, higher transmission ratio drives system will have uneven stresses in the root region of the pinion and wheel. To enrich this agility of uneven stresses in normal-contact ratio (NCR) gearing system, an enhanced system is desirable to be industrialized. To attain this objective, it is proposed to put on the idea of modifying the correction factor in such a manner that the bending strength of the gearing system is improved. In this work, the correction factor is modified in such a way that the stress in the root region is equalized between the pinion and wheel. This equalization of stresses is carried out by providing a correction factor in three circumstances: in pinion; wheel and both the pinion and the wheel. Henceforth performances of this S+, S0 and S- drives are evaluated in finite element analysis (FEA) and compared for balanced root stresses in parallel shaft spur gearing systems. It is seen that the outcomes gained from the modified drive have enhanced performance than the standard drive.

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