Abstract
The seismic evaluation of the important component such as the reactor vessel is important for the seismic probabilistic risk assessment in a Sodium-Cooled Fast Reactor (SFR). The improvement of the evaluation method in the seismic probabilistic risk assessment for the fast reactor is investigated. In the improvement of the evaluation method, the evaluation method, which can evaluate the failure of the important components such as reactor vessels, is necessary. The correlation of the fatigue failure and the integrated vibration energy to the component was confirmed in the past study. Furthermore, the failure evaluation with the vibration energy was investigated. The probability of failure at components can be evaluated by comprehension of the vibration energy necessary for failure. Accordingly, the integrated vibration energy can apply to the failure probability curve. In this study, the failure probability evaluation method, which evaluates integrated vibration energy to the component during an earthquake, is developed. The simple examination specimens, whose main vibration mode is the bending vibration, were made. Furthermore, the vibration examination with the simple examination specimens was carried out by the sine wave. The integrated energy at the simple examination specimen was investigated in the vibration examination. As a result, the integrated energy to failure was approximately 4700 [J] on the examination condition.
