On 21 March, China National Nuclear Power Co., Ltd. (CNNP) announced that a new-generation reactor pressure vessel inspection system, independently developed by its subsidiary China Nuclear Power Operation Technology Corporation, had been successfully deployed. The HAN5 system has completed a full pre-service inspection of the reactor pressure vessel on Unit 3 of the Sanmen Nuclear Power Plant, charting a new path for the independent upgrade of pressure vessel inspection technology for CNNP’s nuclear power units.

Compared with the conventional inspection systems, Han5 reduces the critical path time for pressure vessel inspection by more than three days. It is applicable to Generation II+ and mainstream reactor types, including AP1000 and Hualong One. It fully meets the in-service inspection requirements of international standards, including ASME and RSE-M, demonstrating its strong versatility and high potential for broader adoption.

(Source: China Nuclear Power Operation Technology Corporation)