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Zhou Z.,CNNP Jiangsu Nuclear Power Corporation | Ouyang Q.,CNNP Jiangsu Nuclear Power Corporation | Mao Q.,CNNP Jiangsu Nuclear Power Corporation | Yuan S.,Nuclear Power Institute of China
Hedongli Gongcheng/Nuclear Power Engineering | Year: 2014

The equipment component and system structure of Loose Part Monitoring System (LPMS) in Tianwan NPP are introduced, and the alarm logic of LPMS is described. According to years operation record of LPMS in Tianwan NPP, the typical cases of false alarm of LPMS are analyzed and diagnozed, and the signal characteristics and origin of loose part alarm are summarized.


Yao J.-G.,CNNP Jiangsu Nuclear Power Corporation | Li X.-D.,CNNP Jiangsu Nuclear Power Corporation | Yang X.-Q.,CNNP Jiangsu Nuclear Power Corporation | Li Z.-P.,CNNP Jiangsu Nuclear Power Corporation | Yang G.-S.,CNNP Jiangsu Nuclear Power Corporation
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2014

Six TVS-2M type pilot fuel assemblies were loaded starting from the 5th fuel cycle at Tianwan NPS Unit 1, and would be under 4-year in-core fuel operation lifetime test from the 5th cycle to the 8th fuel cycle. Based on in-core thermal-hydraulic analysis, as well as the thermal-hydraulic test measurement and fuel assembly deformation inspection for the TVS-2M type pilot fuel assemblies, it is verified that the calculation mode of the thermal-hydraulic design code is reasonable and the calculation results are in good agreement with test results. The results show that the TVS-2M type fuel assembly and the AFA fuel assembly have a good compatibility during reactor operation, and the core operation reliability and safety can also be ensured during the transition fuel cycles. ©, 2014, Atomic Energy Press. All right reserved.


Li Y.-Y.,CNNP Jiangsu Nuclear Power Corporation | Yang X.-Q.,CNNP Jiangsu Nuclear Power Corporation | Yao J.-G.,CNNP Jiangsu Nuclear Power Corporation | Wang H.,CNNP Jiangsu Nuclear Power Corporation | And 2 more authors.
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2014

To realize long period refueling for Tianwan Nuclear Power Station (TNPS) units 1 and 2, the fuel management scheme on transition to 18 months refueling was worked out. Referring to management experience in Russian nuclear power station, the long period refueling project shall adopt the new type fuel assembly TVS-2M. Before formal transition to long period fuel cycle, the mixed core compatibility was verified by the operation of pilot TVS-2M fuel assemblies. TVS-2M fuel assemblies replaced AFA fuel assemblies in two steps, namely, TVS-2M with blanket was loaded in the first two transition cycles, and TVS-2M without blanket was loaded in the subsequent cycles. The two TNPS units are scheduled to gradually increase operation length and finally reach 480 effective full-power day (EFPD) in four transition fuel cycles. Transition fuel cycles and equilibrium fuel cycles were all designed to adopt the part-low-leakage core fuel loading, which can reduce neutron irradiation to reactor pressure vessel. Fuel management schemes on 18 months refueling for TNPS enhance units capacity factor and economy, and have flexible cycle length. ©, 2014, Yuanzineng Kexue Jishu/Atomic Energy Science and Technology. All right reserved.


Li Z.-P.,CNNP Jiangsu Nuclear Power Corporation | Yao J.-G.,CNNP Jiangsu Nuclear Power Corporation | Wang H.,CNNP Jiangsu Nuclear Power Corporation | Li X.-D.,CNNP Jiangsu Nuclear Power Corporation | Li B.-K.,CNNP Jiangsu Nuclear Power Corporation
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2014

The long fuel cycle will be implemented in Tianwan Nuclear Power Station, and the design basis accident needs to be re-analyzed since the change of core design. The large break LOCA was analyzed in the paper. Based on the input data and calculation assumption, the most conservative calculated case was obtained through the conservative analysis of the axial power distribution and the ECCS. It is shown that the accept criteria are satisfied in the large break LOCA on long fuel cycle, and the safety margin of the core design is large enough. ©, 2014, Yuanzineng Kexue Jishu/Atomic Energy Science and Technology. All right reserved.


Yao J.-G.,CNNP Jiangsu Nuclear Power Corporation | Wang H.,CNNP Jiangsu Nuclear Power Corporation | Dong C.,CNNP Jiangsu Nuclear Power Corporation | Li B.-K.,CNNP Jiangsu Nuclear Power Corporation | Ye L.-S.,CNNP Jiangsu Nuclear Power Corporation
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2014

After the long fuel cycle is adopted at Tianwan Nuclear Power Station (TNPS), the core thermal and physical parameters will be changed, thus the conclusion in Final Safety Analysis Report is not applicable, and therefore the accidents need to be reanalyzed. In this paper the main assumptions and analytical methods were presented, and the transient calculation program of DINAMIKA-97 was used in analyzing the loss of flow accident. The analysis results indicate that all the safety criteria are met for the loss of flow accident, and the nuclear power station safety can be ensured. ©, 2014, Yuanzineng Kexue Jishu/Atomic Energy Science and Technology. All right reserved.


Li W.,CNNP Jiangsu Nuclear Power CO
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2015

This article mainly introduces the general structure and working principle of whole body contamination monitor being used in Tianwan nuclear power plant radiation control area, describes the monitor's operational aspects and main defects.Through the statistical analysis of monitor's defects, it is found that the main reasons of resulting in monitor malfunction are industrial computer failure, inlet window failure and detector failure, various solutions and maintenance strategies are come up with to reduce faults. Finally, according to the characteristics of the monitor and the use of it, whole body contamination monitor selection suggestions are put forward. © 2015, Editorial Board of Nuclear Electronics & Detection Tech. All right reserved.

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