Reflooding Phenomena in a Single Heated Rod : Part 1, Experimental Study

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概要

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• Reflooding in a loss of coolant accident involves unsteady and very complicated phenomena such as quenching. In this study the reflooding is examined using a simple apparatus with a single electrically heated rod. The purpose of this paper is to present qualitative examinations relating to the phenomena during reflood, and to obtain ascending speed of the quench front and heat transfer coefficient during transient. the results are as follows : (1) A boiling region can be divided into two main parts. One is a film boiling region which occupies the greater part of the boiling region. The other is a nucleate boiling region appearing in a small area around the quench front. (2) The heat transfer coefficients of a film boiling region and a nucleate boiling region are about tens to hundreds and more than thousand kcal/m^2h℃, respectively. (3) The quench front advances upward at a nearly constant speed when the inlet coolant temperature is as low as 20℃.

• 一般社団法人日本機械学会の論文

著者

• KAMINAGA Fumito

  Faculty of Engineering, Ibaraki University

• Kaminaga Fumito

  Faculty Of Engineering Ibaraki University

• UCHIDA Hideo

  Faculty of Engineering,University of Tokyo

• Uchida Hideo

  Faculty Of Engineering University Of Tokyo

関連論文

• Heat transfer characteristics of a radial heat pipe
• Reflooding Phenomena in a Single Heated Rod : Part 2 Analytical Study
• Reflooding Phenomena in a Single Heated Rod : Part 1, Experimental Study
• Heat transfer model for dispersed flow regime during reflood.

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