Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (3): 30401-030401.doi: 10.11889/j.0253-3219.2018.hjs.41.030401


Optimization design for energy response of the mobile radioactive gas monitor

ZHOU Xuemei1,2, LIU Guimin1,2, CHEN Yongzhong1,2   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2. Center for Thorium Molten Salt Reactor System, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2017-10-25 Revised:2017-11-21 Online:2018-03-10 Published:2018-03-14
  • Supported by:
    Supported by Strategic Priority Program of Chinese Academy of Sciences (No.XD02001003)

Abstract: [Background] The mobile radioactive gas monitor responses differently to gamma rays at different energies. [Purpose] This study aims to accurately measure the dose of gamma radiation monitor by means of compensation for energy response. [Methods] Energy responses of NaI(Tl) crystals in the monitor in different lead-hole models were simulated using Monte Carlo N Particle Transport Code (MCNP) software. Various sizes of shielding lead hole were selected to compare the standard deviations of different models, and the optimum size of shielding lead hole was obtained. [Results & Conclusion] The simulation result shows that the energy response of monitor is best compensated when the radius of hole is 3.0 cm and thickness of shielding lead is 0.5 cm.

Key words: Mobile radioactive gas monitor, MCNP, Energy response compensation, Lead shield

CLC Number: 

  • TL812+.1