Liquid Film Dryout and Re-wetting Behavior

Shinichi Morooka, Yasushi Yamamoto, Satoru Oomizu, Yoshiro Kudo, Koji Nishida, Hideya Kitamura

Research output: Contribution to journalArticlepeer-review


This paper deals with liquid film dryout and rewetting behavior under BWR (Boiling Water Reactor) transient condition. The rewetting behavior has not been fully clarified. Therefore, the transient BT (Boiling Transition) tests were performed using a simulated BWR 4x4 rod bundle which many thermocouples were installed along one of the heater rod in order to clarify the re-wetting behavior. The following results were obtained; (1) The BT occurs initially just upstream of the spacer. The location of BT then propagates upstream, and finally rewetting occurs upstream between adjacent spacers. (2) The liquid film front exists between spacers. (3) Rewetting propagation velocity decreases, as wall superheat increases.

Original languageEnglish
Pages (from-to)510-516
Number of pages7
JournalTransactions of the Atomic Energy Society of Japan
Issue number4
Publication statusPublished - 2003
Externally publishedYes


  • boiling transition
  • BWR type reactors
  • dryout
  • liquid film
  • re-wetting

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality


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