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South Korea to Reconsider Accident Management Plans for Four Units at Gori and Hanbit

On September 11, 2026, the Nuclear Safety and Security Commission of South Korea held its 14th meeting of 2026 to review the accident management plans and operating change license applications submitted by Korea Hydro & Nuclear Power (KHNP) for Gori Nuclear Power Plant Units 3 and 4 and Hanbit Nuclear Power Plant Units 1 and 2. The meeting failed to reach a final conclusion and decided to refer the relevant agenda items to the next meeting for continued deliberation. The accident management plan mainly includes the scope of nuclear power plant accident management, management facilities, management strategies, and training programs. For nuclear power units with long operating lives, approval of this plan is generally regarded as an important prerequisite for subsequent discussions on continued operation licenses....

2026-09-12

Cause Identified for Automatic Shutdown of Unit 3 at Shin-Kori Nuclear Power Plant in South Korea

The Nuclear Safety and Security Commission (NSSC) of South Korea reported on the 4th that it has completed its investigation into the automatic shutdown of Unit 3 at the Shin-Kori nuclear power plant during commissioning tests on the 11th of last month, and has approved the resumption of commissioning tests for the unit. The investigation confirmed that the direct cause of the incident was an operator error in inputting parameters during the process of restoring reactor power after the tests. According to the investigation findings, at the time of the incident, while setting the parameters for the turbine control valve position limiter, the operator mistakenly entered a value intended to limit the upper opening limit of the valve as a value in the valve closing direction. This limiter is used to prevent a rapid increase in the amount of steam entering the turbine for power generation within a short period. After the parameter error, the unit experienced an interruption in power output at approximately 80% power level, followed by an automatic shutdown.

2026-09-04

South Korea's Gijang County and KHNP Discuss Communication Issues with Residents near Kori Nuclear Power Plant

Gijang County, Busan, South Korea, said on August 25 that it held talks with Korea Hydro & Nuclear Power (KHNP) that day on pending issues related to the Kori Nuclear Power Plant, focusing on resident communication, allocation of co-prosperity support funds, dry cask storage facilities for spent fuel, and the small modular reactor project. According to Gijang County, KHNP President Kim Hoe-cheon visited the Gijang County government that day and met with County Governor Woo Sung-bin. Since taking office on March 18, Kim Hoe-cheon has been visiting nuclear power plant sites to understand local concerns, and this visit to Gijang County, the site of the Kori Nuclear Power Plant, is part of that ongoing communication effort...

2026-08-26

South Korea's Woori Technology Wins Supply Contract for Control Systems for Kori Nuclear Power Plant Units 3 and 4

Woori Technology announced on August 20 that it has signed a supply contract with Korea Hydro & Nuclear Power (KHNP) to provide equipment and technical support for the Plant Monitoring System (PMS) facility improvement project for Units 3 and 4 of the Kori Nuclear Power Plant. According to the disclosed information, the contract amount is KRW 8.4726 billion, approximately KRW 8.5 billion, excluding value-added tax, accounting for 9.72% of Woori Technology's consolidated sales in 2025. The contract period runs from August 19, 2026 to February 21, 2028, with sales and supply limited to South Korea, and the supply method is in-house production. Under the contract arrangement, Woori Technology will...

2026-08-20

Automatic Reactor Trip at Unit 3 of Shin-Kori Nuclear Power Plant During Commissioning

Unit 3 of the Shin-Kori nuclear power plant in Ulju, Ulsan, South Korea, is undergoing commissioning ahead of its planned commercial operation this year. The Nuclear Safety and Security Commission (NSSC) stated that it had received a report from Korea Hydro & Nuclear Power (KHNP) that the unit's reactor automatically tripped at approximately 20:56 on the 11th. Unit 3 of the Shin-Kori plant received its operating license from the NSSC in December last year and is currently in the power ascension testing phase. KHNP reported that during the commissioning test, when reactor power reached 80%, the unit experienced a loss of power transmission, and the reactor subsequently tripped automatically. The unit has been confirmed to remain in a safe shutdown condition...

2026-08-12

KHNP President Visits Kori Nuclear Power Plant, Pledges Stable Power Supply

Amid sustained heat waves driving up electricity demand, Kim Hoi-cheon, President of Korea Hydro & Nuclear Power (KHNP), recently conducted an on-site inspection at the Kori Nuclear Power Plant headquarters, focusing on the operational status of power generation facilities and frontline working conditions under high-temperature environments. The visit came as the South Korean government issued extreme heat warnings and strengthened its response posture, reflecting heightened attention to the stability of nuclear power as a baseload source in summer electricity supply. According to KHNP, Kim inspected work areas at the Kori plant that are vulnerable to high temperatures, reviewing employee health conditions, working environments, and the implementation of heat prevention and cooling measures. He also examined the operation of...

2026-08-10

South Korea Accelerates Safety Reviews of Long-Term Operating Nuclear Reactors and Advances Licensing of First Spent Fuel Dry Storage Facility

The Nuclear Safety and Security Commission (NSSC) of South Korea stated at its second-half work report meeting on August 4 that it will accelerate safety reviews of long-term operating nuclear reactors while simultaneously advancing regulatory efforts such as licensing systems for spent fuel dry storage facilities and small modular reactors. Under the plan, the NSSC will conduct safety inspections on nine reactors applying for continued operation, with review standards referencing newly built nuclear power plants and confirming safety margins in consideration of the characteristics of long-term unit operation. Among these, whether Kori Nuclear Power Plant Units 3 and 4 will be approved for continued operation in the second half of this year, and whether Hanbit Nuclear Power Plant Units 1 and 2 will be approved for continued operation in the first half of next year, are the near-term review priorities...

2026-08-05

South Korea Confirms Operating Nuclear Power Units Unaffected by Strong Earthquake in Kyushu, Japan

Following the strong earthquake in the Kyushu region of Japan, related aftershock signals have been detected in southern South Korea. The Nuclear Safety and Security Commission (NSSC) of South Korea stated that inspections confirmed all operating nuclear power units within the country remain unaffected. The NSSC noted that after the earthquake, inspections were conducted on all 27 operating nuclear power units, including the Kori Nuclear Power Plant in Busan and the Wolseong Nuclear Power Plant in Gyeongju, with no significant abnormalities or safety issues found. Korea Hydro & Nuclear Power (KHNP) also stated that no reports of damage to nuclear facilities have been received so far. The NSSC will continue to monitor the operational status of nuclear power plants to respond to potential subsequent aftershocks....

2026-07-31