Neutron Dose Measurements Using TLDs in a 252Cf Neutron Field

252Cf 중성자장에서 열형광선량계(TLD)를 이용한 중성자 방사선량 측정

  • Chang, Insu (Health Physics Department, Korea Atomic Energy Research Institute) ;
  • Kim, Sang In (Health Physics Department, Korea Atomic Energy Research Institute) ;
  • Lee, Jung Il (Health Physics Department, Korea Atomic Energy Research Institute) ;
  • Kim, Jang Lyurl (Health Physics Department, Korea Atomic Energy Research Institute) ;
  • Kim, Bong Hwan (Health Physics Department, Korea Atomic Energy Research Institute)
  • 장인수 (한국원자력연구원 방사선방호팀) ;
  • 김상인 (한국원자력연구원 방사선방호팀) ;
  • 이정일 (한국원자력연구원 방사선방호팀) ;
  • 김장렬 (한국원자력연구원 방사선방호팀) ;
  • 김봉환 (한국원자력연구원 방사선방호팀)
  • Received : 2013.02.25
  • Accepted : 2013.03.15
  • Published : 2013.03.30


In case of neutron dose measurement using TLDs (thermo-luminescence dosimeters), because the neutron energy dependence of the TLD is very high, the calibration of the energy response according to the characteristics of the neutron spectrum of workplace is required. In the present study, the ambient dose equivalent rates inside and around the Long-Counter (neutron detector) with narrow and complex inside in the neutron field of $^{252}Cf$ were evaluated. The calibration factors to account for the neutron energy dependence of TLDs were established for both the bare and $D_2O$ modulated $^{252}Cf$ neutron beams, respectively. The values of the TLD's measurement were compared with the computational results of the MCNPX (Monte Carlo N-Particles transport code). When using the two calibration factors of the TLD than a single calibration factor, the measured and the calculated values at the point of verification outside and inside the Long-Counter were in more good agreement. This results show that TLD should be calibrated in the reference neutron field similar to workplace situation.


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