A parametric study on pressure–temperature limit curve using 3-D finite element analyses
| Autor: | Youn-Won Park, Yunok Kim, Juyun Choi, Taek-Jin Lee |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Physics
Nuclear and High Energy Physics Engineering drawing Mechanical Engineering Pressurized water reactor Mechanics Pressure temperature Cladding (fiber optics) Finite element method law.invention Nuclear Energy and Engineering law Boiling water reactor General Materials Science Limit (mathematics) Safety Risk Reliability and Quality Waste Management and Disposal Reactor pressure vessel Parametric statistics |
| Zdroj: | Nuclear Engineering and Design. 214:73-81 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/s0029-5493(02)00016-x |
| Popis: | In order to operate a reactor pressure vessel (RPV) safely, it is necessary to keep the pressure–temperature ( P – T ) limit during the heatup and cooldown process. While the ASME Code provides the P – T limit curve for safe operation, this limit curve has been prepared under conservative assumptions. In this paper, the effects of conservative assumptions involved in the P – T limit curve specified in the ASME Code Sec. XI were investigated. Three different parameters, the crack depth, the cladding thickness and the cooling rate, were reviewed based on 3-D finite element analyses. Also, the constraint effect on P – T limit curve generation was investigated based on J – T approach. It was shown that the crack depth and constraint effect change the safety region in P – T limit curve dramatically, and thus it is recommended to prepare a more precise P – T limit curve based on finite element analysis to obtain P – T limit for safe operation of a RPV. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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