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Penetration Behavior of Liquid Jet Falling Into a Shallow Pool

[+] Author Affiliations
Fumihito Kimura, Akiko Kaneko, Yutaka Abe

University of Tsukuba, Tsukuba, Japan

Hiroyuki Yoshida

Japan Atomic Energy Agency, Naka, Japan

Paper No. ICONE26-81993, pp. V009T16A065; 7 pages
  • 2018 26th International Conference on Nuclear Engineering
  • Volume 9: Student Paper Competition
  • London, England, July 22–26, 2018
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5153-1
  • Copyright © 2018 by ASME


Mitigation measures against severe accidents (SAs) are important from the viewpoint of safety of nuclear reactors. In some scenarios of the SAs, the core materials melt and fall into a water pool in the lower plenum as a jet. The molten material jet is broken up, and heat transfer between molten material and coolant is occurred. This process is called a fuel-coolant interaction (FCI).

The aim of the present study is to clarify the liquid jet behavior falling into a shallow pool. Our focus is on the atomization conditions of a liquid jet injected into the pool with insufficient depth.

In order to understand the jet behavior in a shallow pool, we performed observation of visualization with several methods and mapped observed flow regimes of jet against dimensionless numbers. As a results of observation, we succeeded visualization of internal flow.

Copyright © 2018 by ASME



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