Modal Analysis of a PWR Fuel Rod under Simulated Plant Operation Condition

摘要

In this paper, vibration behavior of the fuel rod of which the properties are changing during its life time due to a Pressurized Water Reactor (PWR) plant operation conditions has been investigated. For the investigation, three kinds of models have been proposed according to the in-reactor condition. With these models, the modal analyses have been performed and the results have been compared with those of the test which has been carried out for verification of the analysis model. The analysis results which simulate the test condition show a good agreement with test results. And the model and the operation conditions proposed in the present analysis may be usefully applied to understand the fuel rod vibrational behavior during its life time in reactor.