311日本福島事故後，核電廠的運轉安全成為全球關心的焦點。核電廠若要能安全運轉，定期維護檢修與更換零組件是不可或缺的一環。因應核能零組件製造廠商日益減少，核能同級品便扮演了重要的替補角色，以維持核能電廠安全運轉。本文由核能電廠儀控系統設計與老化管理切入，介紹我國的核能同級品檢證與驗證制度，並以實際案例帶領讀者進一步瞭解檢證與驗證所使用的作業方法、流程與規範標準。

Since 311 Fukusihma nuclear accidents, this nuclear disaster put the operation safety of the nuclear power plant in the spotlight around the world. The periodic maintenance, inspection and component replacement are key factors to keep the nuclear power plant operating safely. Due to decrease of the manufacturers of the nuclear components, the dedicated commercial-grade item to be used as substitute becomes very important to maintaining the plant safety operation. This report describes the nuclear instrumentation and control system design and its aging management, and then to discuss the nuclear commercial-grade item dedication and qualifi cation system in Taiwan. Furthermore, the cases study to provide the application of the methodology, procedures, and the code and standards used in dedication and qualifi cation process.