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RESEARCH PAPERS

Evaluation and Prediction of Critical Overhang Length Under Pipe Whip Accident

[+] Author and Article Information
T. Yano

Department of Energy Technology, Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd., Isogo-ku, Yokohama 235, Japan

N. Miyazaki

Department of Chemical Engineering, Kyushu University, Higashi-ku, Fukuoka 812, Japan

S. Miyazono

Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-11, Japan

J. Pressure Vessel Technol 108(2), 182-187 (May 01, 1986) (6 pages) doi:10.1115/1.3264767 History: Received March 27, 1984; Revised May 07, 1985; Online November 05, 2009

Abstract

When the pipe length between break exit and restraint is long in the pipe whip accident, the pipe will undergo a plastic collapse as the moment increases. The length at which plastic collapse may occur is called the critical overhang length, (OH)cr . The experimental results of (OH)cr show good agreement with the prediction by a static simplified estimation method for (OH)cr although the pipe whipping is a dynamic phenomenon. The diagrams of (OH)cr are also described for a range of sizes of stainless steel pipe under the loss of coolant accident conditions of light water reactors.

Copyright © 1986 by ASME
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