Scaling analysis of AP1000 ADS-4 entrainment and depressurization

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Abstract

ADS-4 is an important passive safety feature in AP1000 design which provides a controlled depressurization. In this paper, reduced diameter and height scaling analysis with identical fluid properties was conducted on AP1000 ADS-4 blowdown and depressurization process. The scaling analysis consisted of ADS-4 branch line entrainment scaling, system depressurization scaling and upper plenum entrainment scaling. Reasonable dimensionless criteria of related thermal hydraulic phenomena were chosen and developed by analyzing conservation equations. Experimental geometric dimensions and operating conditions for the scaled test facility were obtained.

Original languageEnglish
Pages (from-to)71-78
Number of pages8
JournalProgress in Nuclear Energy
Volume74
DOIs
StatePublished - Jul 2014

Keywords

  • ADS-4 branch entrainment
  • Experimental scaling
  • System depressurization
  • Upper plenum entrainment

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