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Development of an Evaluation Method for Seismic Isolation Systems of Nuclear Power Facilities: Part 3 — Seismic Response of Crossover Piping for Seismic Isolation System

[+] Author Affiliations
Akihito Otani, Teruyoshi Otoyo

IHI Corporation, Yokohama, Kanagawa, Japan

Hideo Hirai, Hirohide Iiizumi

Toshiba Corporation, Yokohama, Kanagawa, Japan

Hiroshi Shimizu

Mitsubishi Heavy Industries, Ltd., Takasago, Hyogo, Japan

Mitsuru Saitoh

Hitachi-GE Nuclear Energy, Ltd., Hitachi, Ibaraki, Japan

Shigenobu Onishi

Chubu Electric Power Co., Inc., Nagoya, Aichi, Japan

Paper No. PVP2014-29012, pp. V008T08A038; 10 pages
  • ASME 2014 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Anaheim, California, USA, July 20–24, 2014
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4607-0
  • Copyright © 2014 by ASME


This paper, which is part of the series entitled “Development of an Evaluation Method for Seismic Isolation Systems of Nuclear Power Facilities”, shows the linear seismic response of crossover piping installed in a seismically isolated plant. The crossover piping, supported by both isolated and non-isolated buildings, deforms with large relative displacement between the two buildings and the seismic response of the crossover piping is caused by two different seismic excitations from the buildings. A flexible and robust structure is needed for the high-pressure crossover piping.

In this study, shaking tests on a 1/10 scale piping model and FEM analyses were performed to investigate the seismic response of the crossover piping which was excited and deformed by two different seismic motions under isolated and non-isolated conditions. Specifically, as linear response analysis of the crossover piping, modal time-history analysis and response spectrum analysis with multiple excitations were carried out and the applicability of the analyses was confirmed. Moreover, the seismic response of actual crossover piping was estimated and the feasibility was evaluated.

Copyright © 2014 by ASME



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