TAILIEUCHUNG - Integrity analysis of an upper guide structure flange

The mode superposition and full transient methods were used to perform timeehistory analyses, and the displacement at the lower end of the flange was obtained. The effect of the damping ratio on the response of the flange was also evaluated, and the acceleration was obtained. The results of elastic and seismic analyses in this study will be used as basic information to judge whether a flange design meets the acceptance criteria. | NuclEngTechnol 47 2015 766 -7 75 ELSEVIER Available online at ScienceDirect journal homepage http nuclear-engineering-and-technology Original Article INTEGRITY ANALYSIS OF AN UPPER GUIDE STRUCTURE FLANGE KI-HYOUNG LEE SUNG-SIK KANG and MYUNG JO JHUNG Korea Institute of Nuclear Safety 62 Gwahak-ro Yuseong-gu Daejeon 305-338 Republic of Korea ARTICLE INFO ABSTRACT Article history The integrity assessment of reactor vessel internals should be conducted in the design Received 1 April 2015 Received in revised form 12 June 2015 Accepted 15 June 2015 Available online 12 August 2015 process to secure the safety of nuclear power plants. Various loads such as self-weight seismic load flow-induced load and preload are applied to the internals. Therefore the American Society of Mechanical Engineers ASME Code Section III defines the stress limit for reactor vessel internals. The present study focused on structural response analyses of the upper guide structure upper flange. The distributions of the stress intensity in the flange body were analyzed under various design load cases during normal operation. The Keywords allowable stress intensities along the expected sections of stress concentration were Design Acceptance Criteria Elastic Analysis Reactor Vessel Internals Seismic Analysis Structural Analysis derived from the results of the finite element analysis for evaluating the structural integrity of the flange design. Furthermore seismic analyses of the upper flange were performed to identify dynamic behavior with respect to the seismic and impact input. The mode superposition and full transient methods were used to perform time-history analyses and the displacement at the lower end of the flange was obtained. The effect of the damping ratio on the response of the flange was also evaluated and the acceleration was obtained. The results of elastic and seismic analyses in this study will be used as basic information to judge .

• Năng lượng
• Integrity analysis of an upper guide structure flange
• Upper guide structure flange
• Flange design meets
• Design Acceptance Criteria
• Reactor Vessel Internals
• Nuclear engineering and technology
• Dynamic characteristics assessment of reactor vessel internals
• Fluid structure interaction
• Response Spectrum Analysis