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Kinoshita, Takahiro*; Okamura, Shigeki*; Nishino, Hiroyuki; Yamano, Hidemasa; Kurisaka, Kenichi; Futagami, Satoshi; Fukasawa, Tsuyoshi*
Transactions of the 26th International Conference on Structural Mechanics in Reactor Technology (SMiRT-26) (Internet), 7 Pages, 2022/07
The seismic evaluation of key components such as reactor vessel is important for the Seismic Probabilistic Risk Assessment (S-PRA) in a Sodium-Cooled Fast Reactor (SFR). Many components were damaged by cumulative damage like fatigue damage during seismic ground motion. However, general evaluation method for key components under seismic ground motion has been based on static loads and elastic region of materials. More accurate evaluation method for S-PRA, which can evaluate the failure of key components such as reactor vessels, has been actually required. In this study, failure probability evaluation method with integrated energy was developed by comparing the energy with vibration tests and fatigue tests. Vibration tests were performed to evaluate integrated vibration energy at failure by energy balance equation and fatigue tests were performed to evaluate integrated vibration energy at failure based on experimental results of fatigue tests.
Rh
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Al
(x = 0,0.1)Tanida, Hiroshi*; Kitagawa, Kentaro*; Tateiwa, Naoyuki; Sera, Masafumi*; Nishioka, Takashi*
Physical Review B, 96(23), p.235131_1 - 235131_7, 2017/12
Times Cited Count：1 Percentile：5.94(Materials Science, Multidisciplinary)We have done high pressure experiments on Ce(RuRh)Al (x = 0 and 0.1) to study pressure-induced phase transitions from the antiferromagnetic to paramagnetic state at 
. Experimental data of the electrical resistivity suggest that the 
-
hybridization gap could be not necessary to form the unusual AFM order. The pressure effects on the magnetic susceptibility is also studied. We discuss a difference in the pressure response of the magnetic susceptibility based the electronic state between x = 0 and 0.1.
Okamura, Shigeki*; Kinoshita, Takahiro*; Yamano, Hidemasa; Kurisaka, Kenichi; Futagami, Satoshi; Fukasawa, Tsuyoshi*
no journal, ,
The seismic evaluation of key components such as the reactor vessel is important for the seismic probabilistic risk assessment in sodium-cooled fast reactors. In the past, the correlation of the fatigue failure and the integrated vibration energy to the component was applied to the failure evaluation in the seismic assessment. The objective of this study is to develop a failure probability evaluation method, which evaluates integrated vibration energy to the component during an earthquake. The fatigue failure evaluation method is investigated with simple vibration examination to failure. The vibration examination with the simple examination specimens, of which main vibration mode is the bending vibration, has been carried out by the random wave. This paper describes the estimation of the integrated vibration energy with the random waves. The integrated vibration energy of the random wave was compared with the integrated vibration energy of the sine wave by the integrated energy per unit time. The integrated vibration energy of the random wave is in the range of the approximate line, which is estimated with the integrated vibration energy of the sine wave. The evaluation method investigated in this study is expected to estimate the integrated energy with the random wave by the integrated energy with the sine wave.
Haga, Yoshinori; Tokiwa, Yoshifumi; Sakai, Hironori; Yamamoto, Etsuji; Kambe, Shinsaku; Tokunaga, Yo; Muro, Yuji*
no journal, ,
no abstracts in English
