Introduction to SSG-30 safety classification method and its preliminary application in CNHCCB TBS

The safety classification for items in nuclear system is the important basis of seismic class, design standards and quality classification. <> (Specific Safety Guide, No. SSG-30) was issued by IAEA in 2014. Compared to the 50-SG-D1 safety classification method issued by IAEA in 1979, the SSG-30 safety classification method adopts different safety classification steps according to the types of items, and adopts the index, such as the failure consequences, to perform safety classification. According to the SSG-30 safety classification guideline, this paper performed some preliminary safety classification application research in China Helium Coolant Ceramic Breeder Test Blanket Module System (CNHCCB TBS). The safety classification research can establish foundation for safety classification of items in fusion system. (authors)