Seismic Proving Test of Ultimate Piping Strength: Test Results on Piping Component and Simplified Piping System

Abstract

In 1998FY, the 6 year program of piping tests was initiated with the following objectives: i) to clarify the elasto-plastic response and ultimate strength of nuclear piping, ii) to ascertain the seismic safety margin of the current seismic design code for piping, and iii) to assess new allowable stress rules. In order to resolve extensive technical issues before proceeding on to the seismic proving test of a large-scale piping system, a series of preliminary tests of materials, piping components and simplified piping systems is intended. In this paper, the current status of the piping component tests and the simplified piping system tests is reported with focus on fatigue damage evaluation under large seismic loading.

Investigation on ultimate strength of thin wall tee pipe for sodium cooled fast reactor under seismic loading

“…A series of failure tests of thick wall piping have been conducted in Light Water Reactors (LWRs) studies. These results indicate that the failure mode of a thick wall piping under seismic loading is low cycle fatigue accompanied by ratchet deformation (Suzuki et al, 2002aand 2002b, Suzuki et al, 2004. Based on these results, the Japanese seismic design code for LWRs JEAC4601-2008 was revised so that the main evaluation of piping under seismic loading is fatigue evaluation (Japan Electric Association Code, 2008).…”

Some Collapse Tests for the Large Scale Models of the Nuclear Reactor Facilities by Shaking Table

“…The objectives of the tests were followings (Suzuki 2002, Suzuki 2003, Suzuki 2004. 1) to clarify the elasto-plastic response and ultimate strength of nuclear piping.…”