The Nuclear Safety and Security Commission reported on the 27th that it received a report from the Korea Hydro and Nuclear Power Corporation around 2:20 p.m. about the discharge of internal air from the containment building of Unit 6 of the Hanbit Nuclear Power Plant, located in Yeonggwang, South Jeolla Province, which occurred 6 times between October 8th and the 10th without passing through the radiation monitor installed at the exhaust.
This is said to be due to the equipment not functioning properly after changes were made to the design of the radiation monitor during the planned preventive maintenance period from July to September. Korea Hydro and Nuclear Power Corporation reported that analysis of samples taken before the discharge confirmed it was within the normal operating range and that the radiation monitor had also been normalized.
The Nuclear Safety and Security Commission noted, "The Hanbit Nuclear Power Plant local office is checking on-site safety, and an investigation team composed of experts from the Korea Atomic Energy Safety Technology Institute is scheduled to be dispatched to the site."