​The Nuclear Emergency Committee Office of the Guangdong Province notified the Security Bureau of an operational event at Ling Ao Nuclear Power Station (LNPS), a Security Bureau spokesperson said today (May 10).

     On May 7, Unit 1 of LNPS was undergoing a planned overhaul for refueling. During routine testing, station staff remotely closed one of the cooling water isolation valves of the standby equipment from the main control room to adjust the cooling water flow, and restored it to normal status on the same day. Since the isolation valve remained closed for a duration exceeding the requirement of the technical specification, this event was classified as a Level 0 deviation on May 8 in accordance with the International Nuclear and Radiological Event Scale and the relevant nuclear safety regulations.  

     Throughout the above event, Unit 1 remained in a safe condition, the three safety barriers remained intact and there was no release of radioactive substances. This deviation did not affect the safety of the Unit, the health of the workers, the nearby public or the environment.

     The Daya Bay Nuclear Power Operations and Management Co Ltd has reported the relevant situation to the nuclear safety regulatory authority in a timely manner, and will conduct internal experience feedback. It has also released the details of this event on its website (www.dnmc.com.cn) (Chinese only), which can be viewed in the "operational events" section under the "nuclear and radiation safety information" page of the website.

Ends/Sunday, May 10, 2026
Issued at HKT 10:30

NNNN