Dust mobilization by high-speed vapor flow under LOVA

K. Matsuki, S. Suzuki, S. Ebara, T. Yokomine, A. Shimizu

Research output: Contribution to journalConference articlepeer-review

11 Citations (Scopus)

Abstract

In the safety analysis on the International Thermonuclear Experimental Reactor (ITER), the ingress of coolant (ICE) event and the loss of vacuum (LOVA) event are considered as one of the most serious accident. On the assumption of LOVA occurring after ICE, it is inferable that activated dusts are under the wet condition. Transport behavior of in-vessel activated dusts under the wet condition is not well understood in comparison with the dry case. In this study, we experimentally investigated the entrainment behavior of dust under LOVA after ICE. We measured dust entrainment by high-speed humid airflow with phase change. Graphite dusts and glass beads are used as substitutions for mobile inventory. The relations among the relative humidity, the entrainment of particles in the exhaust gas flow and the adhesion rate of dust particles on the pipe wall have been made clear, as has the distribution profile of dust deposition on the pipe wall. The entrainment ratio decreased as the relative humidity increased and increased as the initial pressure difference increased.

Original languageEnglish
Pages (from-to)1347-1351
Number of pages5
JournalFusion Engineering and Design
Volume81
Issue number8-14 PART B
DOIs
Publication statusPublished - 2006 Feb
Externally publishedYes
EventProceedings of the Seventh International Symposium on Fusion Nuclear Technology ISFNT-7 Part B -
Duration: 2005 May 222005 May 27

Keywords

  • Dust entrainment
  • Dust mobilization
  • LOVA

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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