Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2007, Vol. 18 ›› Issue (2): 123 doi: 10.1016/S1001-8042(07)60032-3

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Analysis of hot leg natural circulation under station blackout severe accident

DENG Jian CAO Xuewu   

  1. School of Nuclear Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
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DENG Jian CAO Xuewu. Analysis of hot leg natural circulation under station blackout severe accident.Nuclear Science and Techniques, 2007, 18(2): 123     doi: 10.1016/S1001-8042(07)60032-3
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Abstract: Under severe accidents, natural circulation flows are important to influence the accident progression and result in a pressurized water reactor (PWR). In a station blackout accident with no recovery of steam generator (SG) auxiliary feedwater (TMLB’ severe accident scenario), the hot leg countercurrent natural circulation flow is analyzed by using a severe-accident code, to better understand its potential impacts on the creep-rupture timing among the surge line, the hot leg, and SG tubes. The results show that the natural circulation may delay the failure time of the hot leg. The recirculation ratio and the hot mixing factor are also calculated and discussed.

Key words: Severe accident, TMLB’ accident, Natural circulation, Hot leg countercurrent flow