Measurement and Analyses of Radiation -Assessment of Defected Fuel by Analysis of Reactor Coolant Activities-

방사선 측정 및 해석 연구 -원자로 냉각수중의 방사능해석에 의한 결함핵연료봉의 평가-

  • Yang, Jae-Choon (Department of Physics, Chungnam National University) ;
  • Oh, Hi-Peel (Department of Physics, Chungnam National University) ;
  • Jun, Jae-Shik (Department of Physics, Chungnam National University) ;
  • Lee, Ho-Yon (Department of Physics, Chungnam National University) ;
  • Oh, Heon-Jin (Department of Physics, Chungnam National University) ;
  • Chung, Moon-Kyu (Korea Advanced Energy Research Institute) ;
  • Park, Hae-Yong (Korea Institute of Technology)
  • 양재춘 (충남대학교 이과대학 물리학과) ;
  • 오희필 (충남대학교 이과대학 물리학과) ;
  • 전재식 (충남대학교 이과대학 물리학과) ;
  • 이호연 (충남대학교 이과대학 물리학과) ;
  • 오헌진 (충남대학교 이과대학 물리학과) ;
  • 정문규 (한국 에너지 연구소) ;
  • 박해용 (한국과학 기술대학)
  • Published : 1986.12.15

Abstract

An improved mothod of assessing fuel status by analyzsis of the fission product in the reactor coolant system is proposed. The release mechanism of specific fission products is established for determination of the coefficients in the equations which relate the radioactivities with the amount of defected fuel. Knock-out and migration models are employed in the formulation of the release mechanism. The influence of the tramp uranium is quantified. Sample calculations were made for KNU 1 reactor system using the I-131 and I-133 concentrations in the primary coolant. The estimated number of defected fuel pins in the third and sixth cycles appeared to be $9.34{\pm}1.13\;and\;0.294{\pm}0.092$, respectively.

Keywords