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 ›› 2014, Vol. 25 ›› Issue (5): 050301 doi: 10.13538/j.1001-8042/nst.25.050301

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

A fractionation model based on three lognormal particle size distributions

SHANG Jian-Bo,1, 2 SHI Quan-Lin,2 WANG Qun-Shu,1, 2 ZHONG Zhen-Yuan,2 LEI Bei-Fang,2 LIU Jie,2 BAI Tao,2 DAI Yi-Hua, LI Mou2   

  1. 1Department of Engineering Physics, Tsinghua University, Beijing 100084, China
    2Northwest Institute of Nuclear Technology, Xi’an 710024, China
  • Contact: SHANG Jian-Bo E-mail:shangjianbo@nint.ac.cn
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SHANG Jian-Bo, SHI Quan-Lin, WANG Qun-Shu, ZHONG Zhen-Yuan, LEI Bei-Fang, LIU Jie, BAI Tao, DAI Yi-Hua, LI Mou. A fractionation model based on three lognormal particle size distributions.Nuclear Science and Techniques, 2014, 25(5): 050301     doi: 10.13538/j.1001-8042/nst.25.050301

Abstract:

In this paper, a new model is proposed to calculate distribution of fission products in particles of different sizes. The model sensitivity to the effective volume and mass of vaporized soil particles is examined. Compared with other fractionation models, the new method has a much better performance in calculating r89,95, but the calculated cumulative activity fraction for particles in diameters over 100 μm is in between the results using the F-T and G-X models. It is concluded that in a near surface nuclear explosion radioactivity is mainly distributed in soil particles which have not been vaporized, and according to the Henry’s law and ideal gas law, r89,95 may vary in larger particles when effective volume of the fireball is changed.

Key words: Fission products, Fractionation, Diffusion model