Abstract
The maintenance of control and instrumentation (C&I) cables is crucial to safety of operating nuclear power plants. Therefore, when an accident occurs, there is a need for an accurate assessment of the impact on the cable's integrity. Unfortunately, most cable diagnostic methods are destructive and real-time assessment of the effect of accidents is not possible. Thus, in this paper, we present an analysis of a specific type of accident, a loss of coolant accident (LOCA), on C&I cables in real-time, based on time-frequency domain reflectometry (TFDR). Because the TFDR is sensitive to the signal-to-noise ratio and distortion of a reflected signal, we apply postprocessing techniques that compensate the dispersion based on the estimated propagation constant and a denoising method using singular value decomposition. The approach is verified by experimentally monitoring condition changes of localized LOCA hot spot in different C&I cables. The results are also validated by comparing with elongation at break test results.
| Original language | English |
|---|---|
| Article number | 7869345 |
| Pages (from-to) | 1864-1873 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Instrumentation and Measurement |
| Volume | 66 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2017 Jul 1 |
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All Science Journal Classification (ASJC) codes
- Instrumentation
- Electrical and Electronic Engineering
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Real-time condition monitoring of LOCA via time-frequency domain reflectometry. / Lee, Chun Kwon; Kwon, Gu Young; Chang, Seung Jin; Jung, Moon Kang; Park, Jin Bae; Kim, Han Soo; Shin, Yong June.
In: IEEE Transactions on Instrumentation and Measurement, Vol. 66, No. 7, 7869345, 01.07.2017, p. 1864-1873.Research output: Contribution to journal › Article
TY - JOUR
T1 - Real-time condition monitoring of LOCA via time-frequency domain reflectometry
AU - Lee, Chun Kwon
AU - Kwon, Gu Young
AU - Chang, Seung Jin
AU - Jung, Moon Kang
AU - Park, Jin Bae
AU - Kim, Han Soo
AU - Shin, Yong June
PY - 2017/7/1
Y1 - 2017/7/1
N2 - The maintenance of control and instrumentation (C&I) cables is crucial to safety of operating nuclear power plants. Therefore, when an accident occurs, there is a need for an accurate assessment of the impact on the cable's integrity. Unfortunately, most cable diagnostic methods are destructive and real-time assessment of the effect of accidents is not possible. Thus, in this paper, we present an analysis of a specific type of accident, a loss of coolant accident (LOCA), on C&I cables in real-time, based on time-frequency domain reflectometry (TFDR). Because the TFDR is sensitive to the signal-to-noise ratio and distortion of a reflected signal, we apply postprocessing techniques that compensate the dispersion based on the estimated propagation constant and a denoising method using singular value decomposition. The approach is verified by experimentally monitoring condition changes of localized LOCA hot spot in different C&I cables. The results are also validated by comparing with elongation at break test results.
AB - The maintenance of control and instrumentation (C&I) cables is crucial to safety of operating nuclear power plants. Therefore, when an accident occurs, there is a need for an accurate assessment of the impact on the cable's integrity. Unfortunately, most cable diagnostic methods are destructive and real-time assessment of the effect of accidents is not possible. Thus, in this paper, we present an analysis of a specific type of accident, a loss of coolant accident (LOCA), on C&I cables in real-time, based on time-frequency domain reflectometry (TFDR). Because the TFDR is sensitive to the signal-to-noise ratio and distortion of a reflected signal, we apply postprocessing techniques that compensate the dispersion based on the estimated propagation constant and a denoising method using singular value decomposition. The approach is verified by experimentally monitoring condition changes of localized LOCA hot spot in different C&I cables. The results are also validated by comparing with elongation at break test results.
UR - http://www.scopus.com/inward/record.url?scp=85014849021&partnerID=8YFLogxK
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U2 - 10.1109/TIM.2017.2664578
DO - 10.1109/TIM.2017.2664578
M3 - Article
AN - SCOPUS:85014849021
VL - 66
SP - 1864
EP - 1873
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
SN - 0018-9456
IS - 7
M1 - 7869345
ER -