Experimental Research on Aerosol Condensation and Retention in Narrow Cracks of Steel Containments

Wang Shanpu; Tong Lili; Cao Xuewu

doi:10.13832/j.jnpe.2022.06.0128

Volume 43 Issue 6

Dec. 2022

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Wang Shanpu, Tong Lili, Cao Xuewu. Experimental Research on Aerosol Condensation and Retention in Narrow Cracks of Steel Containments[J]. Nuclear Power Engineering, 2022, 43(6): 128-132. doi: 10.13832/j.jnpe.2022.06.0128

Citation:

Wang Shanpu, Tong Lili, Cao Xuewu. Experimental Research on Aerosol Condensation and Retention in Narrow Cracks of Steel Containments[J]. Nuclear Power Engineering, 2022, 43(6): 128-132. doi: 10.13832/j.jnpe.2022.06.0128

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Experimental Research on Aerosol Condensation and Retention in Narrow Cracks of Steel Containments

doi: 10.13832/j.jnpe.2022.06.0128

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

Received Date: 2021-11-22
Rev Recd Date: 2022-01-15
Publish Date: 2022-12-14

Abstract

Abstract

Currently, the effect of narrow cracks on aerosol retention is not taken into account in the radioactivity assessment of containment in a nuclear power plant. However, compared with the conventional size, the high surface/volume ratio of the narrow crack has considerable retention of aerosol leakage, and the assessment results are too conservative. Through the aerosol leakage experiment in the rectangular straight channel, the aerosol retention efficiency in the narrow crack of the steel containment with a crack height of about 100 μm is obtained, and it is observed that the entrance area of narrow crack channel is the main particle deposition area. Besides, by establishing and maintaining a certain temperature gradient in the narrow crack flow direction, the aerosol leakage process in the containment narrow crack is simulated when the containment passive cooling system is put into operation. The results show that the narrow crack has a good retention effect on submicron aerosol, and the steam condensation introduced by temperature gradient can significantly improve the retention efficiency of aerosol to about 91%, and reduce the leakage area.
- Aerosol,
- Steel containment,
- Narrow cracks,
- Retention,
- Steam condensation

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References(13)

References

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