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Inelastic Seismic Test of the Small Bore Piping and Support System: Part 1 — Seismic Proving Test of the Small Bore Piping System

[+] Author Affiliations
Eiji Shirai

Kansai Electric Power Co., Inc., Osaka, Japan

Kazutoshi Eto

Kyushu Electric Power Co., Inc., Fukuoka, Japan

Akira Umemoto

Shikoku Electric Power Co., Inc., Takamatsu, Japan

Toshiaki Yoshii

Hokkaido Electric Power Co., Sapporo, Japan

Masami Kondo

Japan Atomic Power Co., Inc., Tokyo, Japan

Masatsugu Monde

Mitsubishi Heavy Industries, Ltd., Hyogo, Japan

Koichi Tai

Mitsubishi Heavy Industries, Ltd., Kobe, Japan

Paper No. PVP2008-61342, pp. 231-237; 7 pages
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4831-9 | eISBN: 0-7918-3828-5
  • Copyright © 2008 by ASME


Seismic safety is one of the major key issues of nuclear power plant safety in Japan. It is demonstrated that nuclear piping possesses large safety margins in the various piping ultimate test reports. But it is appeared that there still remain some technical uncertainties about the phenomenon when both piping and supports show inelastic behavior in the extremely high seismic excitation level. In order to obtain the influence of the inelastic behavior of the support to the whole piping system response, and the subsequent interaction when both piping and supports show inelastic behavior, the following two tests have been started. • Support element test: Load-displacement characteristics of the support system including U-bolt, support itself and concrete anchorage are obtained by the forced displacement test. • Seismic proving test of piping system: The small bore piping and support system consisted of three dimensional piping, supports, U-bolts, and concrete anchorages will be excited on the table by the extremely higher seismic level. This paper introduces the major results of seismic proving test of piping and support system. The support element test results is presented in the paper of part 2, and the simulation analyses of these tests are summarized in the paper of part 3 [1, 2].

Copyright © 2008 by ASME
Topics: Pipes , Piping systems



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