Journal of Radiation Research and Radiation Processing ›› 2019, Vol. 37 ›› Issue (2): 20603-020603.doi: 10.11889/j.1000-3436.2019.rrj.37.020603

• RADIATION PROTECTION • Previous Articles    

Radiation field calculation for maritime nuclear emergency

QIAN Yongbai1(),DANG Tongqiang2(),WANG Xin1,WANG Jin2,HE Tao2,LONG Pengcheng2,HU Liqin2   

  1. 1. Naval Academy, Beijing 100161, China
    2. Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2018-09-27 Revised:2018-12-06 Accepted:2018-12-06 Online:2019-04-20 Published:2019-04-19
  • Contact: Tongqiang DANG E-mail:qyb91802@139.com;tongqiang.dang@fds.org.cn
  • About author:<named-content content-type="corresp-name">QIAN Yongbai</named-content> (male) was born in July 1967, and received his doctoral degree from Tsinghua University in 2008. Now he is a senior engineer at Naval Academy, majoring in nuclear safety, E-mail: <email>qyb91802@139.com</email>|Ph.D. DANG Tongqiang, associate professor, E-mail: <email>tongqiang.dang@fds.org.cn</email>
  • Supported by:
    the Key Project of 13th Five-year Plan of Hefei Institutes of Physical Science, Chinese Academy of Sciences (CXJJ), Anhui Military-civilian Integration Guidance Fund Project, Informatization Project of Chinese Academy of Sciences (XXH13506-104), and The National Fundamental Science Data Sharing Program of China(DKA2017-12-02-17)

Abstract:

Source term estimation is the primary technology employed for decision-making during nuclear emergencies. Maritime nuclear accidents have the issue of the movement of radioactive source terms and detectors. In this paper, a technical solution is proposed for the source term inversion of a marine nuclear accident, which is based on the time-spatial correction of the Gaussian cloud model and ensemble Kalman filter. Radionuclide concentrations at different positions under the Daya Bay nuclear power plant were incorporated for modeling a hypothetical nuclear accident, and the nuclear accident source strength was thereby obtained through the modified inversion method. The obtained result is found to differ from the hypothetical accident source strength by a margin of 18.4%.

Key words: Maritime nuclear emergency, Source term inversion, Radiation field calculation and dose assessment system

CLC Number: 

  • TL71