418 経年原子力設備の耐震安全評価に関する研究 : 欠陥を有する機器・配管の耐震試験計画(OS3-4 構造健全性,OS3 エネルギー構造機器の健全性評価と信頼性の高度化3)

概要

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Since aging degradation of components and piping in NPP (nuclear power plants) has been a key issue related to seismic safety assessments in Japan, JNES (Japan Nuclear Energy Organization) initiated in fiscal year 2004 the three year test program of degraded piping and components. The objectives were: i) to develop a better understanding of seismic strength of degraded BWR components (core shroud and support) and PLR piping (primary loop recirculation piping) with cracks due to aging, ii) to assure the seismic design safety margin of such degraded components and piping, iii) to verify the JSME Code Rules on Fitness-for-Service for NPP. The element tests of core shroud shell, shroud support and PLR piping are to be conducted under quasi static displacement control of monotonous and cyclic loading. The combined model tests are to be performed on the shaking table, using the 1/2.5 scale model of core shroud shell and shroud support, and the 1/3 scale model of PLR piping. All the test models have simulated cracks due to aging degradation, whose cracks are assumed to have the maximum allowable size according to the JSME Code Rules.
一般社団法人日本機械学会の論文
2005-11-03