Research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accident
In order to explore the transient hydraulic characteristics of reactor coolant pump (RCP) under shaft stuck accident (SSA), it takes CAP1400 RCP as the research object. The applicability of three turbulence simulation methods and the different accident conditions are analyzed by numerical simulation...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Nuclear Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573324004674 |
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| author | Qichao Xia Xiuli Wang Yuanyuan Zhao Rongsheng Zhu Zhichen Wang Shenpeng Yang Wei Xu |
| author_facet | Qichao Xia Xiuli Wang Yuanyuan Zhao Rongsheng Zhu Zhichen Wang Shenpeng Yang Wei Xu |
| author_sort | Qichao Xia |
| collection | DOAJ |
| description | In order to explore the transient hydraulic characteristics of reactor coolant pump (RCP) under shaft stuck accident (SSA), it takes CAP1400 RCP as the research object. The applicability of three turbulence simulation methods and the different accident conditions are analyzed by numerical simulations and experiments. Combined with the appropriate turbulence simulation method and significant SSA conditions, the transient hydraulic characteristics of the whole process are studied. The results show that the numerical simulations align well with experiments during the SSA transition process, with deviations mainly concentrate in the early-middle stage. Large Eddy Simulation (LES) performs well in terms of external characteristics, with the maximum deviations below 10 %. The shorter stuck shaft transition time implies more severe accident damage, with greater the parameters decrease, more drastic specific pressure energy change. Under the kz1 and kz2 conditions, the head and torque decrease first fast and then slow down, while they decrease slowly in the early stage, then decrease sharply, reaching −92.2 % and −75.6 % of the rated value when the impeller stops under the kz3 condition. In the whole process, the head and torque decrease first and then increase, while the vorticity and specific pressure energy increase first and then decrease, all of which change dramatically in the transition process and stabilize in the subsequent response stage. The results provide theoretical and technical guidance for the optimization and improvement, enhancing the capability of accident prevention and mitigation. |
| format | Article |
| id | doaj-art-287422cce0fe4acdb0cc786331f81527 |
| institution | Kabale University |
| issn | 1738-5733 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj-art-287422cce0fe4acdb0cc786331f815272025-01-31T05:11:09ZengElsevierNuclear Engineering and Technology1738-57332025-02-01572103218Research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accidentQichao Xia0Xiuli Wang1Yuanyuan Zhao2Rongsheng Zhu3Zhichen Wang4Shenpeng Yang5Wei Xu6Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, 212013, ChinaSchool of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, 212013, ChinaSchool of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, China; Corresponding author.In order to explore the transient hydraulic characteristics of reactor coolant pump (RCP) under shaft stuck accident (SSA), it takes CAP1400 RCP as the research object. The applicability of three turbulence simulation methods and the different accident conditions are analyzed by numerical simulations and experiments. Combined with the appropriate turbulence simulation method and significant SSA conditions, the transient hydraulic characteristics of the whole process are studied. The results show that the numerical simulations align well with experiments during the SSA transition process, with deviations mainly concentrate in the early-middle stage. Large Eddy Simulation (LES) performs well in terms of external characteristics, with the maximum deviations below 10 %. The shorter stuck shaft transition time implies more severe accident damage, with greater the parameters decrease, more drastic specific pressure energy change. Under the kz1 and kz2 conditions, the head and torque decrease first fast and then slow down, while they decrease slowly in the early stage, then decrease sharply, reaching −92.2 % and −75.6 % of the rated value when the impeller stops under the kz3 condition. In the whole process, the head and torque decrease first and then increase, while the vorticity and specific pressure energy increase first and then decrease, all of which change dramatically in the transition process and stabilize in the subsequent response stage. The results provide theoretical and technical guidance for the optimization and improvement, enhancing the capability of accident prevention and mitigation.http://www.sciencedirect.com/science/article/pii/S1738573324004674Reactor coolant pumpStuck shaft accidentFlow fieldTransient characteristicsRefined numerical simulation |
| spellingShingle | Qichao Xia Xiuli Wang Yuanyuan Zhao Rongsheng Zhu Zhichen Wang Shenpeng Yang Wei Xu Research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accident Nuclear Engineering and Technology Reactor coolant pump Stuck shaft accident Flow field Transient characteristics Refined numerical simulation |
| title | Research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accident |
| title_full | Research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accident |
| title_fullStr | Research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accident |
| title_full_unstemmed | Research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accident |
| title_short | Research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accident |
| title_sort | research on transient hydraulic characteristics of the whole process of reactor coolant pump under shaft stuck accident |
| topic | Reactor coolant pump Stuck shaft accident Flow field Transient characteristics Refined numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S1738573324004674 |
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