Correlation Development on Critical Power in a Spherical Narrow Gap

구형 간극에서의 임계 출력에 대한 상관식 개발

  • 박래준 (한국원자력연구소 열수력안전연구팀) ;
  • 하광순 (한국원자력연구소 열수력안전연구팀) ;
  • 김상백 (한국원자력연구소 열수력안전연구팀) ;
  • 김희동 (한국원자력연구소 열수력안전연구팀) ;
  • 정지환 (천안외국어대 환경관리과)
  • Published : 2001.06.27

Abstract

The CHFG (Critical Heat Flux in Gap) test results have been evaluated to quantify the critical power in hemispherical narrow gaps and a new correlation has been developed. The CHFG test results have shown that increases in the gap thickness and pressure lead to an increase in critical power. The pressure effect on the critical power was found to be much milder than predictions by CHF correlations of other researches. From the CHFG test results, a new correlation on critical power in the hemispherical gap has been developed using the non-dimensional parameters as follows: $$\frac{qCHF}{{\rho}g^hfg}{\cdot}4\sqrt{\frac{{\rho}_g^2}{g{\sigma}{\Delta}{\rho}}=\frac{0.1042}{1+0.1375({\rho}g/{\rho}l)^{0.21}(D/s)}$$ The developed correlation has been expanded to apply the spherical geometry using the Siemens/KWU's correlation.

Keywords