Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Preliminary analyses on decontamination factors during pool scrubbing with bubble size distributions obtained from EPRI experiments

  • Lee, Yoonhee (Department of Nuclear Safety Research, Korea Institute of Nuclear Safety) ;
  • Cho, Yong Jin (Department of Nuclear Safety Research, Korea Institute of Nuclear Safety) ;
  • Ryu, Inchul (PSA& PSR Business Group, Level 2 Probabilistic Risk Assessment, KEPCO Engineering & Construction Company Inc.)
  • Received : 2020.06.03
  • Accepted : 2020.08.12
  • Published : 2021.02.25
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Abstract

In this paper, from a review of the size distribution of the bubbles during pool scrubbing obtained from experiments by EPRI, we apply the bubble size distributions to analyses on the decontamination factors of pool scrubbing via I-COSTA (In-Containment Source Term Analysis). We perform sensitivity studies of the bubble size on the various mechanisms of deposition of aerosol particles in pool scrubbing. We also perform sensitivity studies on the size distributions of the bubbles depending on the diameters at the nozzle exit, the molecular weights of non-condensable gases in the carrier gases, and the steam fractions of the carrier gases. We then perform analyses of LACE-ESPANA experiments and compare the numerical ~ results to those from SPARC-90 and experimental results in order to show the effect of the bubble size distributions.

Keywords

Acknowledgement

This work was supported by the Nuclear Safety Research Program through the Korea Foundation Of Nuclear Safety (KoFONS) using financial resources granted by the Nuclear Safety and Security Commission (NSSC) of the Republic of Korea (No. 1805001).

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