A practical subcritical rod worth measurement technique based on the improved neutron source multiplication method
The control rod worth is a key safety parameter required to be measured in commercial pressurized water reactors (PWRs). Conventionally, the control rod worth is measured after reaching the critical state, which occupies the considerable time in the zero-power physics test. In this study, an efficie...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573323005442 |
| _version_ | 1797238030133624832 |
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| author | Jiahe Bai Chenghui Wan Ser Gi Hong Hongchun Wu |
| author_facet | Jiahe Bai Chenghui Wan Ser Gi Hong Hongchun Wu |
| author_sort | Jiahe Bai |
| collection | DOAJ |
| description | The control rod worth is a key safety parameter required to be measured in commercial pressurized water reactors (PWRs). Conventionally, the control rod worth is measured after reaching the critical state, which occupies the considerable time in the zero-power physics test. In this study, an efficient control-rod worth measurement technique has been proposed based on the improved neutron-source multiplication method, which can be implemented with the source-range detector count rates in the subcritical states. Moreover, the noise reduction technique has been adopted to smooth the large fluctuation existing in the original signals. In order to verify the engineering performance of the proposed measurement technique, the measured source-range detector count rates during the rod withdrawal process before reaching critical state in a CNP1000 reactor have been employed. It demonstrated that almost all estimated results of control rod worth satisfy the engineering acceptance criteria, except one control rod with the relative difference over 10 %, which indicates the capability of the proposed method in estimating control rod worth. |
| first_indexed | 2024-04-24T17:29:09Z |
| format | Article |
| id | doaj.art-35d6051070bd4fadbb64a3483785351c |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-04-24T17:29:09Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-35d6051070bd4fadbb64a3483785351c2024-03-28T06:37:26ZengElsevierNuclear Engineering and Technology1738-57332024-04-0156413981406A practical subcritical rod worth measurement technique based on the improved neutron source multiplication methodJiahe Bai0Chenghui Wan1Ser Gi Hong2Hongchun Wu3School of Nuclear Science and Technology, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi, 710049, China; Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, South KoreaSchool of Nuclear Science and Technology, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi, 710049, China; Corresponding author. School of Nuclear Science and Technology, Xi'an Jiaotong University, 28 Xianning West Road, China.Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea; Corresponding author. Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, China.School of Nuclear Science and Technology, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi, 710049, ChinaThe control rod worth is a key safety parameter required to be measured in commercial pressurized water reactors (PWRs). Conventionally, the control rod worth is measured after reaching the critical state, which occupies the considerable time in the zero-power physics test. In this study, an efficient control-rod worth measurement technique has been proposed based on the improved neutron-source multiplication method, which can be implemented with the source-range detector count rates in the subcritical states. Moreover, the noise reduction technique has been adopted to smooth the large fluctuation existing in the original signals. In order to verify the engineering performance of the proposed measurement technique, the measured source-range detector count rates during the rod withdrawal process before reaching critical state in a CNP1000 reactor have been employed. It demonstrated that almost all estimated results of control rod worth satisfy the engineering acceptance criteria, except one control rod with the relative difference over 10 %, which indicates the capability of the proposed method in estimating control rod worth.http://www.sciencedirect.com/science/article/pii/S1738573323005442Subcritical rod worth measurementImproved neutron-source multiplication methodControl rod withdrawal processSource-range detector count rateNoise reduction technique |
| spellingShingle | Jiahe Bai Chenghui Wan Ser Gi Hong Hongchun Wu A practical subcritical rod worth measurement technique based on the improved neutron source multiplication method Nuclear Engineering and Technology Subcritical rod worth measurement Improved neutron-source multiplication method Control rod withdrawal process Source-range detector count rate Noise reduction technique |
| title | A practical subcritical rod worth measurement technique based on the improved neutron source multiplication method |
| title_full | A practical subcritical rod worth measurement technique based on the improved neutron source multiplication method |
| title_fullStr | A practical subcritical rod worth measurement technique based on the improved neutron source multiplication method |
| title_full_unstemmed | A practical subcritical rod worth measurement technique based on the improved neutron source multiplication method |
| title_short | A practical subcritical rod worth measurement technique based on the improved neutron source multiplication method |
| title_sort | practical subcritical rod worth measurement technique based on the improved neutron source multiplication method |
| topic | Subcritical rod worth measurement Improved neutron-source multiplication method Control rod withdrawal process Source-range detector count rate Noise reduction technique |
| url | http://www.sciencedirect.com/science/article/pii/S1738573323005442 |
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