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Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 1 — Examination Plan

[+] Author Affiliations
Tomohiko Yamamoto, Nobuchika Kawasaki

Japan Atomic Energy Agency, O-arai, Japan

Tsuyoshi Fukasawa, Shigeki Okamura

Mitsubishi FBR Systems, Tokyo, Japan

Takahiro Somaki

Obayashi Corporation, Tokyo, Japan

Yusuke Samejima

Bridgestone Corporation, Tokyo, Japan

Nobuo Masaki

Bridgestone Corporation, Yokohama, Japan

Paper No. PVP2015-45249, pp. V008T08A039; 7 pages
  • ASME 2015 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Boston, Massachusetts, USA, July 19–23, 2015
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5703-8
  • Copyright © 2015 by ASME


This paper describes the past preliminary examination results and the new characteristic examination plans of the thick laminated rubber bearing for the application to Sodium-cooled Fast Reactor (SFR).

The preliminary examination focusing on mechanical characteristics such as shear modulus with a 1/8-scale model (ϕ= 200 mm) and creep characteristics with a 1/13-scale model (ϕ= 120 mm) were carried out [1]. With the basic mechanical characteristic examination, the basic design formulas were temporarily confirmed. Furthermore, to establish the creep prediction formula, the creep characteristic examination has been carried out and the creep amount during the plant life has been approximately predicted.

To obtain the mechanical properties of thick laminated rubber bearing with the scale-effect, the basic mechanical characteristic examination, including the ultimate behavior test, with the 1/2-scale model (ϕ= 800 mm) will be planned to confirm design margin with clarifying the ultimate limit curve under the bi-axial loading such as shear strain and the normal stress. Moreover, the deterioration promoted examination will be planned. The object of this examination is intended to grasp the degree of aging that may be caused by environmental effects during the plant life. By the accelerated deterioration examination results, the influence by aging on the mechanical characteristic and ultimate behavior of the laminated rubber bearing could be evaluated.

Copyright © 2015 by ASME



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