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Nuclear Event – Reactor Shutdown (Manual SCRAM): FitzPatrick Nuclear Power Plant, Scriba, NY

2016/06/27

Technological Hazard  – Nuclear Event

North America – USA | State of New York,  James A. FitzPatrick Nuclear Power Plant Unit 1
Location: 43°31’24.0″N 76°23’54.0″W
Present Operational Age: ~42 years
Event: RPS ACTUATION –  CRITICAL/EQUIPMENT DEGRADATION – MANUAL SCRAM

Nuclear Event in USA on Friday, 24 June, 2016 at 12:15 [EDT]

MANUAL REACTOR SCRAM DUE TO REACTOR RECIRCULATION PUMPS DEGRADATION

“At 1215 [EDT] on 6/24/2016, James A. FitzPatrick (JAF) was at 100% power when Breaker 710340 tripped and power was lost to L-gears L13, L23, L33, and L43. These provide non-vital power to Reactor Building Ventilation (RBV), portions of Reactor Building Closed Loop Cooling (RBCLC), and ‘A’ Recirculation pump lube oil systems. Off-site AC power remains available to vital systems and Emergency Diesel Generators (EDG) are available.

“Due to the loss of RBV, Secondary Containment differential pressure increased. At 1215 [EDT], Secondary Containment differential pressure exceeded the Technical Specifications (TS) Surveillance Requirement SR-3.6.4.1.1 of greater than or equal to 0.25 inches of vacuum water gauge. The Standby Gas Treatment (SBGT) system was manually initiated and Secondary Containment differential pressure was restored by 1219 [EDT].

“The ‘A’ Recirculation pump tripped at 1215 [EDT] and reactor power decreased to approximately 50%. ‘B’ Recirculation pump temperature began to rise due to the degraded RBCLC system. At 1236 [EDT], a manual scram was initiated. Reactor Pressure Vessel (RPV) water level shrink during the scram resulted in a successful Group 2 isolation. All control rods have been inserted. The RPV water level is being maintained with the Feedwater System and pressure is being maintained by main steam line bypass valves. A cooldown is in progress and JAF will proceed to cold shutdown (Mode 4). Due to complete loss of RBCLC system, the Spent Fuel Pool (SFP) cooling capability is degraded but the Decay Heat Removal system remains available. SFP temperature is slowly rising and it is being monitored. The time [duration] to 200 degrees is approximately 117 hours.

“The initiation of reactor protection systems (RPS) due to the manual scram at critical power is reportable per 10 CFR 50.72(b)(2)(iv)(B) and 10 CFR 50.72(b)(3)(iv)(A). The general containment Group 2 isolations are reportable per 10 CFR 50.72(b)(3)(iv)(A). In addition, the temporary differential pressure change in Secondary Containment is reportable per 10 CFR 50.72(b)(3)(v)(C), as an event that could have prevented fulfillment of a safety function.”

The licensee notified the NRC Resident Inspector and the State of New York.

Source: NRC  Event Number: 52042


Event: OFFSITE NOTIFICATION/EQUIPMENT DEGRADATION – COLD SHUTDOWN

Nuclear Event in USA on Sunday, 26 June, 2016 at 21:15 [EDT].

OFFSITE NOTIFICATION DUE TO AN OIL SPILL

“The United States Coast Guard reported an oil sheen in the vicinity of the station’s circulating water system effluent. Investigation by station personnel has not determined the source. The circulating water pumps were secured to mitigate the potential source. The United States Coast Guard response Center, and New York State Department of Environmental Conservation have been notified.”

The licensee notified the NRC Resident Inspector.

Notified DOE, EPA, USDA, HHS, FEMA.

* * * UPDATE ON 06/27/2016 AT 02:52 FROM DUSTIN SCURLOCK TO DAN LIVERMORE * * *

“The source of the oil sheen has been identified. The source, main turbine lubricating oil, has been stopped and cleanup efforts are underway.”

Notified DOE, EPA, USDA, HHS, and FEMA.

Source: NRC  Event Number: 52045

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