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 ›› 2009, Vol. 20 ›› Issue (6): 359-362 doi: 10.13538/j.1001-8042/nst.20.359-362

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Monte Carlo simulation to key parameters of a compensated neutron logger

TUO Xianguo1,2 YANG Jianbo1,2,* MU Keliang1,2 LI Zhe1,2 LONG Qiong2   

  1. 1 Provincial Key Lab of Applied Nuclear Techniques in Geosciences, Chengdu University of Technology, Chengdu 610059, China
    2 Chengdu University of Technology, Chengdu 610059, China
PDF ShareIt Export Citation
TUO Xianguo, YANG Jianbo, MU Keliang, LI Zhe, LONG Qiong. Monte Carlo simulation to key parameters of a compensated neutron logger.Nuclear Science and Techniques, 2009, 20(6): 359-362     doi: 10.13538/j.1001-8042/nst.20.359-362

Abstract:

A compensated neutron logger (CNL) is designed by using Monte-Carlo simulation for lead shield thickness, near-to-far detector spacing range, source-to-detector spacing range, and detector’s effective length. The calculated results indicate that the optimum conditions for CNL are 80-mm thick lead plus 1-cm thick LiOH shield in front of the near detector, 250 mm for the near-to-far detector distance (Δr), and the source-to-detector distance (r) of 90mm. Simultaneously, some conclusion also obtained here, near/far detector counting response ratio (R) increases with the effective length of detector, R increases with the porosity for oil and water sandstones, and the oil sandstone is a bit greater than water sandstone.

Key words: Monte Carlo, MCNP, Logging, CNL optimal design