On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop
A direct current potential drop method utilizing array probes with measurement ends maintaining an equalized potential designated as equi-potential switching array probe direct current potential drop (ESAP-DCPD) technique has been developed earlier at Seoul National University. This paper validates...
| Main Authors: | , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer US
2016
|
| Online Access: | http://hdl.handle.net/1721.1/105811 https://orcid.org/0000-0002-5818-9825 |
| _version_ | 1826216636099592192 |
|---|---|
| author | Kim, Y. Choi, S. Yoon, J. Y. Nam, W. C. Hwang, I. S. Bromberg, Leslie Stahle, Peter W Ballinger, Ronald G. |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Kim, Y. Choi, S. Yoon, J. Y. Nam, W. C. Hwang, I. S. Bromberg, Leslie Stahle, Peter W Ballinger, Ronald G. |
| author_sort | Kim, Y. |
| collection | MIT |
| description | A direct current potential drop method utilizing array probes with measurement ends maintaining an equalized potential designated as equi-potential switching array probe direct current potential drop (ESAP-DCPD) technique has been developed earlier at Seoul National University. This paper validates ESAP-DCPD technique by showing consistency among experimental measurements, analytical solution and numerical predictions using finite element analysis (FEA) of electric field changes with crack growth in metals. In order to examine its viability as an on-line monitoring of environment assisted crack growth at the inner surface of piping welds, artificial inner surface cracks were introduced in a full-scale weldment mockup pipe and stainless steel metal mockup pipe. The weldment was joined by low alloy steel and stainless steel pipes. The pipes were monitored by using ESAP-DCPD in laboratory environments. Optimization of electrical wiring configuration has produced results with significantly reduced noise for adequately long period of time. Then optimized experimental results were compared with the FEA prediction results for the mockup to show a good agreement. Also a round-robin measurement has been made at three laboratories. It has been found that the developed ESAP-DCPD can detect circumferential cracks with a depth of 40 % of wall thickness in stainless steel with a good detectability for further growth behaviors. For axial cracks, however, the measurements showed poor detectability. Hence the developed ESAP-DCPD system can be used to monitor large circumferential cracks that existing non-destructive examination techniques often fail to detect until leakage takes place. |
| first_indexed | 2024-09-23T16:50:18Z |
| format | Article |
| id | mit-1721.1/105811 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:50:18Z |
| publishDate | 2016 |
| publisher | Springer US |
| record_format | dspace |
| spelling | mit-1721.1/1058112023-02-26T02:51:51Z On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop Kim, Y. Choi, S. Yoon, J. Y. Nam, W. C. Hwang, I. S. Bromberg, Leslie Stahle, Peter W Ballinger, Ronald G. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Plasma Science and Fusion Center Bromberg, Leslie Stahle, Peter W Ballinger, Ronald G A direct current potential drop method utilizing array probes with measurement ends maintaining an equalized potential designated as equi-potential switching array probe direct current potential drop (ESAP-DCPD) technique has been developed earlier at Seoul National University. This paper validates ESAP-DCPD technique by showing consistency among experimental measurements, analytical solution and numerical predictions using finite element analysis (FEA) of electric field changes with crack growth in metals. In order to examine its viability as an on-line monitoring of environment assisted crack growth at the inner surface of piping welds, artificial inner surface cracks were introduced in a full-scale weldment mockup pipe and stainless steel metal mockup pipe. The weldment was joined by low alloy steel and stainless steel pipes. The pipes were monitored by using ESAP-DCPD in laboratory environments. Optimization of electrical wiring configuration has produced results with significantly reduced noise for adequately long period of time. Then optimized experimental results were compared with the FEA prediction results for the mockup to show a good agreement. Also a round-robin measurement has been made at three laboratories. It has been found that the developed ESAP-DCPD can detect circumferential cracks with a depth of 40 % of wall thickness in stainless steel with a good detectability for further growth behaviors. For axial cracks, however, the measurements showed poor detectability. Hence the developed ESAP-DCPD system can be used to monitor large circumferential cracks that existing non-destructive examination techniques often fail to detect until leakage takes place. Korea (South). Ministry of Trade, Industry and Energy. Korea Institute of Energy Technology Evaluation and Planning 2016-12-13T18:45:28Z 2016-12-13T18:45:28Z 2015-12 2015-09 2016-08-18T15:42:53Z Article http://purl.org/eprint/type/JournalArticle 0195-9298 1573-4862 http://hdl.handle.net/1721.1/105811 Yoon, J. Y. et al. “On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop.” Journal of Nondestructive Evaluation 35.1 (2016): n. pag. https://orcid.org/0000-0002-5818-9825 en http://dx.doi.org/10.1007/s10921-015-0330-8 Journal of Nondestructive Evaluation Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ Springer Science+Business Media New York application/pdf Springer US Springer US |
| spellingShingle | Kim, Y. Choi, S. Yoon, J. Y. Nam, W. C. Hwang, I. S. Bromberg, Leslie Stahle, Peter W Ballinger, Ronald G. On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop |
| title | On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop |
| title_full | On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop |
| title_fullStr | On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop |
| title_full_unstemmed | On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop |
| title_short | On-Line Monitoring of Environment-Assisted Cracking in Nuclear Piping Using Array Probe Direct Current Potential Drop |
| title_sort | on line monitoring of environment assisted cracking in nuclear piping using array probe direct current potential drop |
| url | http://hdl.handle.net/1721.1/105811 https://orcid.org/0000-0002-5818-9825 |
| work_keys_str_mv | AT kimy onlinemonitoringofenvironmentassistedcrackinginnuclearpipingusingarrayprobedirectcurrentpotentialdrop AT chois onlinemonitoringofenvironmentassistedcrackinginnuclearpipingusingarrayprobedirectcurrentpotentialdrop AT yoonjy onlinemonitoringofenvironmentassistedcrackinginnuclearpipingusingarrayprobedirectcurrentpotentialdrop AT namwc onlinemonitoringofenvironmentassistedcrackinginnuclearpipingusingarrayprobedirectcurrentpotentialdrop AT hwangis onlinemonitoringofenvironmentassistedcrackinginnuclearpipingusingarrayprobedirectcurrentpotentialdrop AT brombergleslie onlinemonitoringofenvironmentassistedcrackinginnuclearpipingusingarrayprobedirectcurrentpotentialdrop AT stahlepeterw onlinemonitoringofenvironmentassistedcrackinginnuclearpipingusingarrayprobedirectcurrentpotentialdrop AT ballingerronaldg onlinemonitoringofenvironmentassistedcrackinginnuclearpipingusingarrayprobedirectcurrentpotentialdrop |