Study on the formation mechanism of uranium aerosol under explosion load

LIU Zhiyong; WANG Jintao; HE Bin; LUO Yongfeng; WANG Fei

doi:10.11883/bzycj-2021-0075

Volume 41 Issue 5

May 2021

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ChuWen-hua, SunLong-quan, YaoXiong-liang, TianZhao-li. ResearchonimpactcharacteristicsofexplosiveboltsusingSPH method[J]. Explosion And Shock Waves, 2013, 33(3): 249-254. doi: 10.11883/1001-1455(2013)03-0249-06

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LIU Zhiyong, WANG Jintao, HE Bin, LUO Yongfeng, WANG Fei. Study on the formation mechanism of uranium aerosol under explosion load[J]. Explosion And Shock Waves, 2021, 41(5): 052201. doi: 10.11883/bzycj-2021-0075

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Study on the formation mechanism of uranium aerosol under explosion load

doi: 10.11883/bzycj-2021-0075

LIU Zhiyong^{1, 2
,},
WANG Jintao^{1
,
,},
HE Bin¹,
LUO Yongfeng²,
WANG Fei¹

1.
Department of Nuclear Engineering, Rocket Force University of Engineering, Xi’an, 710025, Shaanxi, China
2.
Academy of Rocket Force, Beijing 100015, China

Received Date: 2021-03-03
Rev Recd Date: 2021-04-16
Publish Date: 2021-05-05

Abstract

Abstract

Aiming at the process of uranium material forming radioactive aerosol under the action of explosion load, numerical simulation and experimental research were carried out based on the smoothed particle hydrodynamic method (SPH method). Through the combination of particle dynamics and SPH method, a numerical simulation model of explosive detonation acting on a uranium metal shell was established, which would be used to describe the formation process of uranium aerosol. The specific internal energy of uranium material was used as the aerosol conversion criterion, and the physical process of uranium material conversion into aerosol was obtained. We found two types of damage mode of the uranium under explosive load, one was overall damage when the uranium shell mass was close to the explosive mass, and the other one was crushing damage when the uranium shell mass was much less than the explosive mass. Under the same explosive equivalent, the aerosol conversion efficiencies of uranium materials with different mass were compared with the experimental results. The results show that uranium material can be considered to be completely converted into aerosol when its specific internal energy reaches 1.9 MJ/kg under explosive load. According to the explosive device structure in this paper, when the explosive mass is six times than the mass of uranium, the conversion ratio exceeds 90%. The experimental results have a good agreement with the numerical simulations, which shows that the method used in this paper can accurately describe the aerosol conversion process of uranium materials.
- uranium,
- aerosol,
- explosion load,
- smoothed particle hydrodynamics method

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References

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