Nuclear Reactor Facilities Regulation Act Article 9

After nuclear reactor facilities have been formally operated, one integrated safety assessment shall be implemented at least once every ten years and then be submitted to the competent authority for review and approval.
中文原文 核子反應器設施管制法第9條
核子反應器設施於正式運轉後,每十年至少應作一次整體安全評估,並報請主管機關審核。

English translation for reference only; the Chinese text prevails. Not legal advice.