Study on ultimate strength of thin-wall piping components for fast breeder reactors under seismic loading

地震荷重下での高速炉薄肉配管の終局強度に関する研究

渡壁 智祥; 北村 誠司 ; 月森 和之; 森下 正樹 

Watakabe, Tomoyoshi; Kitamura, Seiji; Tsukimori, Kazuyuki; Morishita, Masaki

配管の終局強度や破損様式を把握することは、設計評価の信頼性及び合理化の観点から重要である。本件では、高速炉で用いられる外径/板厚比が比較的大きい薄肉配管の破損様式を把握するために実施した動的破壊試験結果について報告する。

It is important to confirm failure modes and safety margin until ultimate strength of piping components from the point of view of seismic safety. Though, many dynamic failure tests of the thick-wall piping components for Light Water Reactors (LWRs) have been performed, there are little dynamic failure test data of the thin-wall pipe for Fast Breeder Reactors (FBRs). This paper presents a series of dynamic failure tests of thin-wall elbows with the diameter/thickness ratio close to that of the main piping of FBRs and discusses about vibration characteristics in elastic-plastic region, failure modes under dynamic load and the results of piping design evaluation for the test model. Moreover, the test results were compared to the Finite Element Analysis (FEA) results.