配管系の熱疲労評価技術の開発
Development of thermal fatigue evaluation methods of piping systems
著者:
笠原 直人 Naoto KASAHARA 伊藤 隆基 Takamoto ITOH 岡崎 正和 Masakazu OKAZAKI 東芝 奥田 奥田 幸彦 Yukihiko OKUDA 釜谷 昌幸 Masayuki KAMAYA 中村 晶 Akira NAKAMURA 町田 秀夫 Hideo MACHIDA ＭＲＩ 松本 松本 昌昭 Masaaki MATSUMOTO
発刊日:
公開日:
Knowledge-baseNuclear PipingNumerical simulationThermal FatigueThermal HydraulicsThermal Stress
概要
Nuclear piping has various kinds of thermal fatigue failure modes. Main causes of thermal loads are structural responses to fluid temperature changes during plant operation. These phenomena have complex mechanisms and so many patterns, that their problems still occur even though well-known issues. To prevent thermal fatigue due to above thermal loads, the JSME guideline is adopted. Both thermal load and fatigue failure mechanism have been investigated and summarized into the knowledgebase. Based on above knowledge, improved methods for the JSME guideline and Numerical simulation methods for thermal fatigue evaluation were studied. Furthermore, probabilistic failure analysis approach with main influence parameters were investigated to be applied for the plant system safety.
