China’s nuclear safety regulator has published its pre-licence inspection report for Sanmen Unit 3. The report records substantial readiness but requires specific rectifications before first fuel loading and a response before the operating licence is issued.
Sanmen Unit 3 has reached a documented regulatory checkpoint before operation. China’s National Nuclear Safety Administration published its pre-licence inspection report on October 26, following checks carried out from October 12 to 16. The covering letter is dated October 24. The report describes construction and commissioning activities as controlled overall, while setting out work that must still be completed.
The distinction is concrete. Of 474 commissioning tests required before first fuel loading, 473 had been completed at inspection. The remaining test concerned discharge from the automatic depressurization system. All 101 systems requiring transfer to operations had been handed over, while 406 of 424 required rooms had been transferred.
Readiness includes unfinished obligations
The inspection examines quality assurance, safety-related equipment, commissioning, operating preparation, radiation protection, emergency arrangements and other areas. Its overall assessment does not erase the outstanding items. Six rectification requirements follow the findings.
These include completing the remaining test and room handovers before first loading, addressing radiation-boundary and fire-protection deficiencies, strengthening temporary separation between Units 3 and 4, and taking action on embedded anchor bolts whose applied standard was below the design requirement. The report also calls for improvements in site protection and conventional environmental management.
The value of publishing such findings lies in their specificity. “Ready” is not presented as a single percentage that absorbs every unfinished task. Individual conditions retain their own consequence for proceeding, even where other systems and organizational arrangements satisfy the relevant requirements.
Inspection does not issue the licence
The operator is instructed to submit its improvement measures and implementation status to the national regulator and the regional supervision station before the operating licence is issued. Several requirements are expressly tied to completion before first fuel loading.
The document therefore records an inspection outcome and a route for addressing remaining work. It does not announce that the operating licence has been issued, that fuel loading has occurred or that the unit is generating electricity. Preserving those separate stages allows readers to see what the report establishes: substantial preparation, identified deficiencies and an explicit obligation to resolve and report them before the next regulatory step.
Take-Out
The inspection makes the remaining obligations visible. Sanmen’s next step depends on resolving identified work and reporting its completion; a favorable overall assessment is not an operating licence.
Questions and answers
What readers should know
- What is the fresh development?
- Publication on October 26 of the regulator’s pre-operating-licence inspection report, with its covering letter dated October 24.
- When did the inspection occur?
- The inspection took place from October 12 to 16.
- What test remained incomplete at inspection?
- The report identifies one remaining pre-loading commissioning test concerning automatic depressurization system discharge.
- Does the report grant an operating licence?
- No. It requires the operator to report improvement measures and implementation before the operating licence is issued.
- What should not be inferred from the favorable overall assessment?
- It does not establish that fuel loading or electricity generation has occurred, or remove the specific rectification requirements.
Stay in the loop
Keep Mark and Focus in view
Hear about future publications, announcements, and relevant updates from Mark and Focus.