The Thresholds of Performance Indicator

Cornerstone	Performance Indicator			Thresholds
Initiating Events	The number of unplanned scrams during the previous 4 quarters, both manual and automatic, while critical per 7,000 hours			≦3.0	＞3.0	＞6.0	＞25
	Total unplanned scrams while critical in the previous 4 quarters with loss of normal heat removal			≦2.0	＞2.0	＞10	＞20
	The number of unplanned changes in reactor power of greater than 20% full-power, per 7,000 hours of critical operation excluding manual and automatic scrams			≦6.0	＞6.0	NA	NA
Mitigating Systems	The unavailability of safety system in the previous 12 quarters	All Plants	≦2EDG	≦2.5％	＞2.5％	＞5.0％	＞10.0％
			＞2EDG	≦2.5％	＞2.5％	＞10.0％	＞20.0％
		BWR	HPCI	≦4.0％	＞4.0％	＞12.0％	＞50.0％
			HPCS	≦1.5％	＞1.5％	＞4.0％	＞20.0％
			RCIC	≦4.0％	＞4.0％	＞12.0％	＞50.0％
			RHR	≦1.5％	＞1.5％	＞5.0％	＞10.0％
		PWR	HPSI	≦1.5％	＞1.5％	＞5.0％	＞10.0％
			AFW	≦2.0％	＞2.0％	＞6.0％	＞12.0％
			RHR	≦1.5％	＞1.5％	＞5.0％	＞10.0％
	The number of safety system functional failures in the previous 4 quarters		BWR	≦6.0	＞6.0	NA	NA
			PWR	≦5.0	＞5.0	NA	NA
Barrier Integrity	The percentage of Reactor Coolant System specific activity to the Technical Specification limit in the previous 4 quarters			≦50.0％	＞50.0％	＞100.0％	NA
	Public Radiation Safety :The percentage of Reactor Coolant System leakage rate to the Technical Specification limit in the previous 4 quarters			≦50.0％	＞50.0％	＞100.0％	NA
Emergency Preparedness	Drill/Exercise Performance			≧90％	≧70％	＜70％	NA
	Emergency Response Organization Drill Participation			≧80％	≧60％	＜60％	NA
	Alert and Notification System Reliability			≧94％	≧90％	＜90％	NA
Occupational Radiation Safety	Occupational Radiation Exposure Control Effectiveness in the previous 4 quarters			≦2	＞2	＞5	NA
Public Radiation Safety	The performance of the Radiological Effluent Control Program in the previous 4 quarters			≦1	＞1	＞3	NA
Liquid Radioactive Waste Management	Average Liquid radioactive waste generated (gallon per day) in the previous 3 months			≦0.9 FSAR	≦1.0 FSAR	＞1.0 FSAR	NA
	Recycling ratio of liquid radioactive waste in the previous 3 months			≧92％	≧90％	＜90％	NA
	The number of Correction Request and Violation relative to liquid radioactive waste in the previous 3 months			The number of Correction Request <2 and no violation	The number of Correction Request ≤4 or  level Ⅴ violation equal to 1	The number of Correction Request >4 or level Ⅴ violation equal to 2 or level Ⅳ violation equal to 1	The number of level Ⅴ violation ≥ 3 or level Ⅳ violation  ≥ 2 or level Ⅲ violation  ≥1

：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.