The coolant of emergency core cooling system (ECCS), for long-term core cooling (LTCC), comes from the containment sump under the loss-of-coolant accident (LOCA). In the event of LOCA, within the containment of the pressurized water reactor (PWR), thermal insulation of piping and other materials in the vicinity of the break could be dislodged. A fraction of these dislodged insulation and other materials would be transported to the floor of the containment by coolant. Some of these debris might get through strainer and eventually accumulate over the suction sump screens of the emergency core cooling systems (ECCS). So, these debris like fibrous glass, fibrous wool, chemical precipitates and other particles cause pressure drop across the sump screen to increase, affecting the cooling water recirculation. As to address this safety issue, the downstream effect tests were performed over full-scale mock up fuel assembly. Sensitivity studies on pressure drop through LOCA-generated debris, deposited on fuel assembly, were performed to evaluate the effects of debris type and flowrate. Fibrous debris is the most crucial material in terms of causing pressure drop, with fibrous wool (FW) debris being more efficacious than fibrous glass (FG) debris.
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2017 25th International Conference on Nuclear Engineering
July 2–6, 2017
Shanghai, China
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5784-7
PROCEEDINGS PAPER
Sensitivity Study of LOCA-Generated Debris on the Pressure Drop of Fuel Assembly Available to Purchase
Hammad Aslam Bhatti,
Hammad Aslam Bhatti
North China Electric Power University, Beijing, China
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Zhangpeng Guo,
Zhangpeng Guo
North China Electric Power University, Beijing, China
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Weiqian Zhuo,
Weiqian Zhuo
North China Electric Power University, Beijing, China
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Shahroze Ahmed,
Shahroze Ahmed
North China Electric Power University, Beijing, China
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Da Wang,
Da Wang
North China Electric Power University, Beijing, China
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Fenglei Niu
Fenglei Niu
North China Electric Power University, Beijing, China
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Hammad Aslam Bhatti
North China Electric Power University, Beijing, China
Zhangpeng Guo
North China Electric Power University, Beijing, China
Weiqian Zhuo
North China Electric Power University, Beijing, China
Shahroze Ahmed
North China Electric Power University, Beijing, China
Da Wang
North China Electric Power University, Beijing, China
Fenglei Niu
North China Electric Power University, Beijing, China
Paper No:
ICONE25-67122, V006T08A081; 5 pages
Published Online:
October 17, 2017
Citation
Bhatti, HA, Guo, Z, Zhuo, W, Ahmed, S, Wang, D, & Niu, F. "Sensitivity Study of LOCA-Generated Debris on the Pressure Drop of Fuel Assembly." Proceedings of the 2017 25th International Conference on Nuclear Engineering. Volume 6: Thermal-Hydraulics. Shanghai, China. July 2–6, 2017. V006T08A081. ASME. https://doi.org/10.1115/ICONE25-67122
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