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| Entered date | Event description | |
|---|---|---|
| ENS 54185 | 27 July 2019 22:31:00 | At 1929 EDT on 7/27/2019, with the Unit in Mode 1 at 98 percent power, the reactor automatically scrammed due to a Main Turbine Trip. The trip was not complex, with all systems responding normally post-trip. Main Steam Isolation Valves (MSIVs) were manually closed to prevent exceeding Reactor Pressure Vessel Cooldown Rate. Rector Core Isolation Cooling (RCIC) was manually initiated to stabilize Reactor Vessel Water Level and Pressure following MSIV closure. The Main Condenser and Feedwater are available. Operations responded and stabilized the plant. Reactor water level is being maintained via RCIC. Decay heat is being removed by discharging steam to the Main Condenser and RCIC. The cause of the Main Turbine Trip is currently under investigation. The site is in a normal electrical lineup. The licensee notified the NRC Resident Inspector. |
| ENS 54085 | 24 May 2019 13:09:00 | At 0730 (EDT) on May 24, 2019, it was discovered that the Low-Pressure Core Spray System was inoperable. At Perry, the Low-Pressure Core Spray system is considered a single train system in Modes 1, 2, and 3; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v). Inoperability of the Low-Pressure Core Spray system was caused by Emergency Service Water Pump A inoperability. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. |
| ENS 52468 | 30 December 2016 14:40:00 | On December 28, 2016 at 2119 EST, the Standby Liquid Control system (SLC) subsystem A was declared inoperable in accordance with the surveillance instruction for performance of a routine surveillance test. At 2229 EST, control room operators received an out-of-service alarm for the explosive-actuated injection valve for SLC subsystem B and declared subsystem B inoperable, thereby rendering both subsystems inoperable. With both subsystems inoperable, the SLC system was unable to fulfill its safety function. At 2335, the surveillance was completed and subsystem A was restored to operable status, which restored the ability for the system to fulfill its safety function. Troubleshooting determined that the cause for subsystem B inoperability was an intermittent electrical connection for the explosive-actuated injection valve. Repairs were conducted and the subsystem was restored to operable status on December 29, 2016 at 1708 EST. This issue was entered into the Corrective Action Program and during post reportability review, it was determined that this was a reportable event under 10 CFR 50.72(b)(3)(v)(A) for an event or condition that could have prevented the fulfillment of a safety function of a system that is needed to shut down the reactor and maintain it in a safe shutdown condition and under 10 CFR 50.72(b)(3)(v)(D) for a system that was unavailable for accident mitigation. The NRC Resident Inspector has been notified. |
| ENS 49746 | 21 January 2014 02:19:00 | This notification is being made pursuant to (10 CFR) 50.72(b)(2)(xi), notification of other government agency. Notification to other government agency, State of Ohio, was made at 0140 (EST) on 1/21/14. At 1310 on 1/20/2014, a leak was identified on a feed water Venturi. In response to the water leak, samples were taken to check for the spread of tritium. A positive result for tritium was identified in the under drain system in the Auxiliary Building which requires communications as part of the NEI ground water protection initiative. The positive sample results were obtained at 2330 on 1/20/14. Actions are in progress stop the leak (perform leak injection). The EPA limit for groundwater is 20,000 pCi/l. The samples taken by the licensee indicated 46,000 pCi/l. The licensee has notified the NRC Resident Inspector and will notify local counties. |
| ENS 45798 | 28 March 2010 22:13:00 | At 1818 , the control room was notified of a lube oil fire on Reactor Feed Pump Turbine B. The fire brigade was toned out, and the Perry Township Fire Department was notified for assistance. Reactor Feed Pump Turbine B was manually tripped to allow removing the turbine lube oil system from service. The Motor Feed Pump started as expected, and the Reactor Recirculation system lowered reactor power as designed. Currently the reactor is at 68% reactor power following rod line adjustments after the transient was complete. The fire was reported to be out by the fire brigade leader at 2122. Damage assessment is currently in progress. Two fire brigade members were transported by ambulance to Tri-Point Medical Center with signs of heat exhaustion. Both individuals were verified to be free of contamination prior to transport. A news release will be made due to local media interest for this event. The NRC Resident Inspector has been notified.
The purpose of this call is to update Event Number 45798. In the notification made on 3/28/10, it was stated that a news release would be made due to local media interest for this event. After further review, it was determined that discussions with the media adequately addressed the interest and that a new release will not be made. The NRC Resident Inspector has been notified. Notified R3DO (Duncan). |
| ENS 45440 | 16 October 2009 01:48:00 | On October 16, 2009 at 0048 a manual reactor scram was inserted at the Perry Nuclear Plant. The plant was conducting a planned shutdown due to the Division 2 Emergency Service Water inoperability. While shifting reactor recirculation pumps to slow speed the 'A' pump failed to transfer and tripped off. Following stabilization from this event a manual reactor scram was inserted from approximately 30% power. This was different from the initial planned shutdown sequence. Following the scram all systems operated as expected. The plant is stable in Mode 3. The plant will transition to Mode 4 in accordance with Technical Specification 3.7.1 (Emergency Service Water Inoperability) required actions. All control rods fully inserted and the plant electrical power is in a normal line-up. The licensee notified the NRC Resident Inspector. |
| ENS 45423 | 9 October 2009 18:07:00 | On October 9, 2009, at approximately 1544 hours EDT, notification of an oil spill was made to the U.S. Environmental Protection Agency (EPA), National Response Center. At the time of the event, the plant was in Mode 1 at 100% power. The oil spill was the result of delivery activities related to a backhoe that was delivered to the Perry Nuclear Power Plant in the owner controlled area. The spill was initially estimated to be approximately 3 to 5 gallons of a red colored oil resembling hydraulic fluid. With current rainy weather conditions, the resultant sheen covered an area of approximately 20 to 25 feet by 100 feet of gravel and asphalt. The spill drained into two storm drains. The backhoe was moved inside of a building with a concrete floor. Absorbent material and oil selective soak mulch were placed on the area of the spill. Clean Harbors Incorporated (CHI) was contacted for clean up assistance. CHI representatives are providing assistance for clean-up remediation. Additionally, the Ohio EPA: State Emergency Response Commission, Perry Township Fire Department, Lake County Emergency Planning committee, and the U.S. Coast Guard were notified in accordance with plant procedures. This event is also being reported in accordance with the Operating License, Appendix B, Environmental Protection Plan, which states in part, 'Any occurrence of an unusual or important event that indicates or could result in significant environmental impact causally related to plant operation shall be recorded and reported to the NRC within 24 hours followed by written report. Specifically, unanticipated or emergency discharge of waste water or chemical substances.' The licensee has notified the NRC Resident Inspector. |