Measurement of vibration and stress for APR-1400 reactor internals

다국어 초록 (Multilingual Abstract)

The U.S. Nuclear Regulatory Commission, Regulatory Guide 1.20 needs to perform a comprehensive vibrationassessment program for reactor internals during preoperational and startup testing for nuclearpower plants and extended power uprate. Although the measurement program is one of the core programs,it is rarely carried out except for a first-of-a-kind or a unique design. This article describesmeasurement results of vibration and stress for the comprehensive vibration assessment program for anAPR-1400 reactor internals. The measurement was performed at an upper guide structure during thepre-core hot functional test of Shin Kori unit 4 reactor internals because the Shin Kori unit 3 and 4 are thefirst construction project for the APR-1400, and the upper guide structure assembly was to design changecompared with the valid prototype. We confirmed that all measured results are within the test acceptancecriteria. It means that the structural integrity of the APR-1400 reactor internals was secured for theflow-induced vibration.

참고문헌 (Reference)

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