The operating licenses of Chinshan NPP Unit 1 and 2 expired in December 2018 and July 2019 respectively. For Chinshan NPP’s performance indicator information after the third quarter of 2019, please refer to  Oversight of NPP Decommissioning.
The operating licenses of Kuosheng NPP Unit 1 and 2 expired in December 2021 and March 2023 respectively. For Kuosheng NPP’s performance indicator information after the first quarter of 2023, please refer to  Oversight of NPP Decommissioning.
The operating licenses of Maanshan NPP Unit 1 and 2 expired in July 2024 and May 2025 respectively. For Maanshan NPP’s performance indicator information after the Second quarter of 2025, please refer to  Oversight of NPP Decommissioning.

Performance Indicator/NPP Kuosheng Maanshan 1 2 1 2 Initiating Events Unplanned scrams while critical per 7,000 hours, both manual and automatic Unplanned scrams while critical with loss of normal heat removal Unplanned changes in reactor power of greater than 20% full-power, per 7,000 hours of critical operation Mitigating Systems The unavailability of high pressure cooling system( HPCI/HPCS) The unavailability of reactor core isolation cooling (RCIC) or axillary feed water system (AFW). The unavailability of residual heat removal (RHR) The unavailability of emergency diesel. generator (EDG) Safety system functional failures Barrier Integrity Reactor Coolant System Specific Radioactivity Reactor Coolant System leakage Emergency Preparedness Drill/Exercise Performance Emergency Response Organization Drill Participation Alert and Notification System Reliability Radiation protection Occupational Radiation Exposure Control Effectiveness The performance of the Radiological Effluent Control Program Liquid Radioactive Waste Management Liquid radioactive waste generated Recycling ratio of liquid radioactive waste Correction Request and Violation relative to liquid radioactive waste

：indicates performance within an expected performance level where the associated cornerstone objectives are met.
：represents performance outside an expected range of nominal utility performance but related cornerstone objectives are still being met.
：indicates related cornerstone objectives are being met, but with a minimal reduction in the safety margin.
：signals a significant reduction in safety margin in the area measured by the performance indicator.