Temperature Profile Measurement in Simulated Fuel Assembly Structure with Wire-Mesh Technology
When light water reactor (LWR) is subject to a cold shutdown, it needs to be cooled with pure water or seawater to prevent the core melting. To precisely evaluate the cooling characteristics in the fuel assembly, a measurement method capable of installing to the fuel assembly structure and determini...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2018/2631084 |
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| author | Hiroki Takiguchi Masahiro Furuya Takahiro Arai |
| author_facet | Hiroki Takiguchi Masahiro Furuya Takahiro Arai |
| author_sort | Hiroki Takiguchi |
| collection | DOAJ |
| description | When light water reactor (LWR) is subject to a cold shutdown, it needs to be cooled with pure water or seawater to prevent the core melting. To precisely evaluate the cooling characteristics in the fuel assembly, a measurement method capable of installing to the fuel assembly structure and determining the temperature distribution with high temporal resolution, high spatial resolution, and in multidimension is required. Furthermore, it is more practical if applicable to a pressure range up to the rated pressure 16 MPa of a pressurized water reactor (PWR). In this study, we applied the principle of the wire-mesh sensor technology used in the void fraction measurement to the temperature measurement and developed a simulated fuel assembly (bundle) test loop with installing the temperature profile sensors. To investigate the measurement performance in the bundle test section, it was confirmed that a predetermined temperature calibration line with respect to time-average impedance was calculated and became a function of temperature. To evaluate the followability of measurement in a transient temperature change process, we fabricated a 16 × 16 wire-mesh sensor device and measured the hot-water jet-mixing process into the cold-water pool in real time and calculated the temperature profile from the temperature calibration line obtained in advance from each measurement point. In addition, the sensors applied to three-dimensional temperature distribution measurement of a complex flow field in the bundle structure. The axial and cross-sectional profiles of temperature were quantified in the forced flow field with nonboiling when the 5×5 bundle was heated by energization. |
| format | Article |
| id | doaj-art-2ad35aac62294acab8a9ac9d6bb4e924 |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-2ad35aac62294acab8a9ac9d6bb4e9242025-02-03T01:11:34ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832018-01-01201810.1155/2018/26310842631084Temperature Profile Measurement in Simulated Fuel Assembly Structure with Wire-Mesh TechnologyHiroki Takiguchi0Masahiro Furuya1Takahiro Arai2Central Research Institute of Electric Power Industry, 240-0196, JapanCentral Research Institute of Electric Power Industry, 240-0196, JapanCentral Research Institute of Electric Power Industry, 240-0196, JapanWhen light water reactor (LWR) is subject to a cold shutdown, it needs to be cooled with pure water or seawater to prevent the core melting. To precisely evaluate the cooling characteristics in the fuel assembly, a measurement method capable of installing to the fuel assembly structure and determining the temperature distribution with high temporal resolution, high spatial resolution, and in multidimension is required. Furthermore, it is more practical if applicable to a pressure range up to the rated pressure 16 MPa of a pressurized water reactor (PWR). In this study, we applied the principle of the wire-mesh sensor technology used in the void fraction measurement to the temperature measurement and developed a simulated fuel assembly (bundle) test loop with installing the temperature profile sensors. To investigate the measurement performance in the bundle test section, it was confirmed that a predetermined temperature calibration line with respect to time-average impedance was calculated and became a function of temperature. To evaluate the followability of measurement in a transient temperature change process, we fabricated a 16 × 16 wire-mesh sensor device and measured the hot-water jet-mixing process into the cold-water pool in real time and calculated the temperature profile from the temperature calibration line obtained in advance from each measurement point. In addition, the sensors applied to three-dimensional temperature distribution measurement of a complex flow field in the bundle structure. The axial and cross-sectional profiles of temperature were quantified in the forced flow field with nonboiling when the 5×5 bundle was heated by energization.http://dx.doi.org/10.1155/2018/2631084 |
| spellingShingle | Hiroki Takiguchi Masahiro Furuya Takahiro Arai Temperature Profile Measurement in Simulated Fuel Assembly Structure with Wire-Mesh Technology Science and Technology of Nuclear Installations |
| title | Temperature Profile Measurement in Simulated Fuel Assembly Structure with Wire-Mesh Technology |
| title_full | Temperature Profile Measurement in Simulated Fuel Assembly Structure with Wire-Mesh Technology |
| title_fullStr | Temperature Profile Measurement in Simulated Fuel Assembly Structure with Wire-Mesh Technology |
| title_full_unstemmed | Temperature Profile Measurement in Simulated Fuel Assembly Structure with Wire-Mesh Technology |
| title_short | Temperature Profile Measurement in Simulated Fuel Assembly Structure with Wire-Mesh Technology |
| title_sort | temperature profile measurement in simulated fuel assembly structure with wire mesh technology |
| url | http://dx.doi.org/10.1155/2018/2631084 |
| work_keys_str_mv | AT hirokitakiguchi temperatureprofilemeasurementinsimulatedfuelassemblystructurewithwiremeshtechnology AT masahirofuruya temperatureprofilemeasurementinsimulatedfuelassemblystructurewithwiremeshtechnology AT takahiroarai temperatureprofilemeasurementinsimulatedfuelassemblystructurewithwiremeshtechnology |