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Numerical Simulation of Aerosol Retention Characteristics under Sodium Fire Accident Conditions in Sodium Technology Rooms
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Yi-chen LI, Huan-jun ZHU, Xiang-yu YAN
Science Technology and Engineering | 2025, 25(16) : 6766 - 6773
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Science Technology and Engineering | 2025, 25(16): 6766-6773
• Papers·Nuclear Technology •
Numerical Simulation of Aerosol Retention Characteristics under Sodium Fire Accident Conditions in Sodium Technology Rooms
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Yi-chen LI, Huan-jun ZHU, Xiang-yu YAN
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  • China Institute of Atomic Energy, Beijing 102413, China
Published: 2025-06-08 doi: 10.12404/j.issn.1671-1815.2404997
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Sodium fire accidents in sodium technology room can generate harmful aerosols. To analyze the impact of sodium fire aerosol particle migration, a microchannel grid structure similar to real cracks was constructed using computational fluid dynamics(CFD) method based on the actual concrete crack characteristics to simulate the migration process of aerosol particles in the room wall. A two-dimensional horizontal microchannel flow model was established, considering gravity, inertial force, and the influence of Saffman lift and Brownian diffusion on particle motion was studied, and a microchannel particle motion model was constructed to numerically simulate particle retention characteristics for different gap structures. The results indicate that when the gap size is less than submillimeter, it is considered that there is no risk of causing a large amount of aerosol particle leakage in the gap. The branching corners and uneven micro structures within concrete gaps can effectively reduce the penetration coefficient of particles in the gaps and reduce leakage.

sodium fire aerosol  /  microchannels  /  sodium cooled fast reactor  /  numerical simulation
Yi-chen LI, Huan-jun ZHU, Xiang-yu YAN. Numerical Simulation of Aerosol Retention Characteristics under Sodium Fire Accident Conditions in Sodium Technology Rooms[J]. Science Technology and Engineering, 2025 , 25 (16) : 6766 -6773 . DOI: 10.12404/j.issn.1671-1815.2404997
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Year 2025 volume 25 Issue 16
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doi: 10.12404/j.issn.1671-1815.2404997
  • Receive Date：2024-07-04
  • Online Date：2025-07-09
  • Published：2025-06-08
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  • Received：2024-07-04
  • Revised：2025-03-07
Affiliations
    China Institute of Atomic Energy, Beijing 102413, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
species		 占总种数比例
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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