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 Entered dateSiteRegionReactor typeEvent description
ENS 539774 April 2019 15:16:00Oyster CreekNRC Region 1Oyster Creek NGS (Nuclear Generating Station) Tech Support Center (TSC) ventilation is not functional due to a broken belt on exhaust fan FN-843-14. The TSC ventilation system will remain non-functional until fan belt replacement can be completed. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii) due to partial loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector has been notified."
ENS 531536 January 2018 06:05:00Oyster CreekNRC Region 1GE-2

Oyster Creek Declared an Unusual Event HU 6 Hazardous Event for an Abnormal Intake Structure Level Less than or equal to -3.0 feet MSL (Mean Sea Level) on points 23 and 24 in the Main Control Room at time 0524 (EST). The licensee notified the NRC Resident Inspector, State, and local authorities. Notified DHS SWO, FEMA Operations Center, DHS NICC, FEMA NWC (email), DHS Nuclear SSA (email), and FEMA NRCC SASC (email).

  • * * UPDATE ON 1/6/18 AT 2325 EST FROM JAMES RITCHIE TO BETHANY CECERE * * *

Oyster Creek Terminated Unusual Event HU 6 Hazardous Event for an Abnormal Intake Structure Level at time 2308 (EST). The licensee notified the NRC Resident Inspector, State, and local authorities. Notified R1DO (Werkheiser), NRR EO (King), IRD MOC (Gott), DHS SWO, FEMA Operations Center, DHS NICC, FEMA NWC (email), DHS Nuclear SSA (email), and FEMA NRCC SASC (email).

ENS 529548 September 2017 12:49:00Oyster CreekNRC Region 1GE-2A non-licensed employee supervisor had a confirmed positive for a prohibited substance during a random fitness-for-duty (FFD) test. The individual's unescorted access to the plant has been removed. The licensee has notified the NRC Resident Inspector.
ENS 5286114 July 2017 21:44:00Oyster CreekNRC Region 1GE-2

Oyster Creek Generating Station has experienced a loss of the Technical Support Center (TSC) ventilation system due to an electrical perturbation. If an emergency is declared requiring TSC activation during the time TSC ventilation is non-functional, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii) due to a loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector has been notified.

  • * * UPDATE AT 0537 EDT ON 07/15/17 FROM JIM RITCHIE TO S. SANDIN * * *

TSC ventilation was restored at 0128 EDT on 07/15/17. The licensee will inform the NRC Resident Inspector. Notified R1DO (Dimitriadis).

ENS 528393 July 2017 12:32:00Oyster CreekNRC Region 1GE-2At 1015 (EDT) a manual reactor scram was inserted due to degrading main condenser vacuum. All rods inserted into the core as expected and all systems functioned as expected during the scram. This event is reportable within 4 hours per 10 CFR 50.72(b)(2)(iv)(B) 'any event or condition that results in actuation of the Reactor Protection System (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.' At 1033 (EDT) an automatic reactor scram occurred on low reactor water level. Due to the previous manual reactor scram, all rods were (already) inserted. This event is reportable within 8 hours per 10 CFR 50.72(b)(3)(iv)(A) 'any event or condition that results in valid actuation of any of the systems listed in paragraph (b)(3)(iv)(B) of this section, except when the actuation results from and is part of a preplanned sequence during testing or reactor operation. (1) Reactor protection system (RPS) including : Reactor scram and reactor trip.' Decay heat is being removed using main feedwater and the turbine bypass valves. The licensee notified the NRC Resident Inspector. This event was characterized as a "configuration control event" where a valve misposition allowed the offgas line to flood.
ENS 5267412 April 2017 21:06:00Oyster CreekNRC Region 1GE-2

Oyster Creek Generating Station has experienced a loss of the Technical Support Center (TSC) ventilation system due to charcoal filter test failure. A charcoal filter replacement is planned. If an emergency is declared requiring TSC activation during the time TSC ventilation is non-functional, the TSC will be staffed and activated using existing emergency planning procedure unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii) due to a loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector will be notified.

  • * * RETRACTION ON 4/20/17 AT 1447 EDT FROM JIM RITCHIE TO DONG PARK * * *

This is a retraction of ENS notification 52674. After further testing and evaluation, the station concluded that the TSC Ventilation Charcoal filter met the acceptance criteria, and the TSC Ventilation was not inoperable at the moment the original ENS notification was performed. The licensee will notify the NRC Resident Inspector. Notified R1DO (Arner).

ENS 5246529 December 2016 09:25:00Oyster CreekNRC Region 1GE-2

Oyster Creek Generating Station has experienced a loss of the TSC (Technical Support Center) ventilation system. If an emergency is declared requiring TSC activation during the time TSC ventilation is non-functional, the TSC will be staffed and activated using existing emergency planning procedure unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii) due to a potential loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector has been notified.

  • * * UPDATED FROM JOSH MCGUIRE TO DONALD NORWOOD AT 1521 EST ON 12/30/16 * * *

At 1410 EST on 12/30/16, maintenance is complete and the TSC ventilation system has been restored to normal operation. The licensee notified the NRC Resident Inspector. Notified R1DO (Lilliendahl).

ENS 5238120 November 2016 06:01:00Oyster CreekNRC Region 1GE-2At 0342 EST, an automatic reactor scram was processed during turbine valve testing. All rods inserted into the core as expected and all systems functioned as expected during the scram. The event is reportable within 4 hours per 10 CFR 50.72(b)(2)(iv)(B) - any event or condition that results in actuation of the Reactor Protection System (RPS) when the reactor is critical except when the actuation results from and is part of a preplanned sequence during testing or reactor operation. The plant response to the reactor scram was uncomplicated. The main feedwater system is maintaining reactor water level and decay heat is being removed by the main turbine bypass valves to the main condenser. The unit is in a normal shutdown electrical lineup. No SRVs lifted during the scram. The licensee was testing the main turbine trip function just prior to the scram. The cause is under investigation. The licensee notified the NRC Resident Inspector.
ENS 522309 September 2016 12:55:00Oyster CreekNRC Region 1GE-2Oyster Creek Nuclear Station made notifications to local authorities that a sewage radiation monitor was out of service due to an equipment deficiency for greater than 24 hours. Alternate sampling methods are being utilized. The licensee notified Ocean County Utilities Commission, Lacey Municipal Utilities, and the NRC Resident Inspector.
ENS 5203021 June 2016 18:12:00Oyster CreekNRC Region 1GE-2Today at 1646 EDT a reportable spill of approximately 1 liter of Sodium Hypochlorite 15 percent solution reached the soils of New Jersey. The leak was able to be isolated and the area is being cleaned up. This event is reportable within 4 hours per 10 CFR 50.72(b )(2)(xi) any event or situation related to protection of the environment for which a notification to other government agencies has been made. The licensee notified the New Jersey Department of Environmental Protection and has notified the NRC Resident Inspector.
ENS 5189530 April 2016 19:14:00Oyster CreekNRC Region 1GE-2Today at 1804 EDT, a manual scram was processed during startup due to rising unidentified leak rate. The rise in unidentified leak rate was identified to be coming from the D Reactor Recirc Pump seal cavity. All rods inserted into the core and all systems functioned as expected during the scram. The event is reportable within 4 hours per 10 CFR 50.72(b)(2)(iv)(B) - any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation. The reactor is stable in hot shutdown. The licensee notified the NRC Resident Inspector.
ENS 5167723 January 2016 08:26:00Oyster CreekNRC Region 1GE-2

Oyster Creek Generating Station has experienced a loss of power to the Site Emergency Building, which renders the TSC ventilation system non-functional until power is restored. If an emergency is declared requiring TSC activation during the time TSC ventilation is non-functional, the TSC will be staffed and activated using existing emergency planning procedure unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10 CFR 50.72(b)(3)(xii) due to potential loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector has been notified.

  • * * UPDATE FROM ANDREW KRUKOWSKI TO JEFF HERRERA AT 1121 EST ON 1/23/16 * * *

Due to a loss of power to the Site Emergency Building the Plant Process Computer needed to be secured. Due to the loss of the Plant Process Computer the Emergency Response Data System (ERDS) functions are not available for communications to the NRC.

The licensee has notified the NRC Resident Inspector. Notified R1DO (Gray).

  • * * UPDATE FROM ANDREW KRUKOWSKI TO HOWIE CROUCH AT 1446 EST ON 1/23/16 * * *

Power was restored to the Site Emergency Building. TSC Ventilation and the ERDS systems were returned to service at 1440 EST. The licensee has notified the NRC Resident Inspector. Notified R1DO (Gray).

ENS 516344 January 2016 08:14:00Oyster CreekNRC Region 1GE-2The NJ DEP (New Jersey Department of Environmental Protection) was contacted due to a coolant leak from our Emergency Diesel Generator (EDG) that reached the waters of New Jersey. The coolant contains a hazardous substance per NJAC 7:1 E. The EDG has been removed from service for repairs. The Licensee has notified the NRC Resident Inspector.
ENS 514453 October 2015 14:46:00Oyster CreekNRC Region 1GE-2A non-licensed supervisory employee had a confirmed positive for alcohol during a for-cause fitness-for-duty test. The employee's access to the plant has been restricted. The licensee notified the NRC Resident Inspector.
ENS 511081 June 2015 06:57:00Oyster CreekNRC Region 1GE-2

A planned maintenance evolution at the Oyster Creek Generating Station has removed the Technical Support Center (TSC) ventilation system from service. The TSC ventilation system will be rendered non-functional during the course of the work activities. The TSC ventilation is expected to be out of service for approximately sixteen hours and will return to service at approximately 2200 (EDT) June 1, 2015. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii) due to potential loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector has been notified.

  • * * UPDATE FROM JOSHUA MCGUIRE TO JOHN SHOEMAKER AT 2324 EDT ON 6/1/15 * * *

At 2240 EDT on 6/1/15, the TSC ventilation system was restored. The licensee will notify the NRC Resident Inspector. Notified the R1DO (Powell).

ENS 510557 May 2015 18:55:00Oyster CreekNRC Region 1GE-2Today at 1727 EDT, an automatic scram from a turbine trip occurred. The cause of the turbine trip is currently under investigation. All rods inserted into the core and all systems functioned as expected during the scram. The event is reportable within 4 hours per 10CFR50.72(b)(2)(iv)(B) - any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation. Plant response to the scram was uncomplicated and the plant is stable in Mode 3. The licensee has notified the NRC Resident Inspector.
ENS 5091622 March 2015 15:17:00Oyster CreekNRC Region 1GE-2RPS Actuation (scram) on a Hi-Hi APRM (average power range monitor) signal (which) occurred due to a pressure spike following a failure of the EPR (Electric Pressure Regulator). All Rods Inserted. All systems responded normally. No other safety system actuations occurred. Plant will proceed to a cold shut down condition. The plant is in a normal electrical lineup. Core cooling is being maintained by the bypass valves to the condenser. The licensee has notified the NRC Resident Inspector and will notify the local and state governments. A press release is planned by the licensee.
ENS 5052412 October 2014 05:22:00Oyster CreekNRC Region 1GE-2

Today at approximately 0250 (EDT) (on 10/12/14), during a planned reactor power ascension with reactor power at approximately 1% of rated thermal power, reactor water level began lowering. Operators inserted a manual SCRAM at 0251 (EDT) in accordance with station procedures. The cause of the lowering reactor level is currently under investigation. All rods inserted into the core and all systems functioned as expected during the scram. No electromatic (EMRVs) or safety relief valves lifted during the transient. The plant is currently shutdown and plant parameters are stable. This event is reportable per 10CFR50.72(b)(2)(iv)(B) - 'any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.' Decay heat is being released to the main condenser and normal offsite power is being maintained. The licensee has notified the NRC Resident Inspector.

  • * * UPDATE PROVIDED BY JOSH MCGUIRE TO JEFF ROTTON AT 1520 EDT ON 10/17/2014 * * *

An automatic SCRAM occurred at 0251 EDT, moments before operators inserted a manual SCRAM in accordance with station procedures. The licensee notified the NRC Resident Inspector. Notified R1DO (Cook).

ENS 5049525 September 2014 16:35:00Oyster CreekNRC Region 1GE-2The following report was received via e-mail: This is a non-emergency notification from Oyster Creek Nuclear Generating Station (OCNGS) required under 10 CFR Part 21 concerning the design of Electromatic Relief Valve (EMRV) actuators. On June 20, 2014, during as-found bench (stroke) testing of the EMRV actuators removed from the plant during refueling outage 1R24 (October 2012), two of five EMRV actuators failed to operate. Subsequent inspection of these actuators found unexpected wear of the posts (grooves approximately 1/2 inch from the top), springs (thinned and broken at the top), and guides (grooves inside), with one spring having a piece axially wedged between the post and the guide. The root cause of this failure was determined to be the inadequate design of the EMRV actuators in that when placed in an environment where the actuator is subject to the vibration associated with plant operation, the allowed installation tolerances between posts and guides can create a condition where the springs can jam the actuator plunger assembly by wedging between the guides and the posts. If the EMRV actuators are set up in a condition where the posts are not optimally aligned, preferential wear of the post is observed due to interaction of the post, spring, and guide. Additionally, the vendor guidance for refurbishment of the EMRV actuator does not provide the necessary acceptance criteria for alignment of the posts to guides to ensure that the springs, posts, and guides do not interact in a way that causes preferential wear of the post allowing the jamming mechanism to exist. By OCNGS process, the EMRV actuators are refurbished with new springs, posts, guides, and microswitches every 24 months during refueling outages due to the known wear of these parts. The actuator inspection/refurbishment frequency of 24 months exceeds the manufacturer's (i.e., Dresser Industries) recommended frequency of 36 months (per Vendor Manual VM-OC-0030, Installation and Maintenance Manual for Electromatic Relief Valves, Revision 1, Section VII, Ref. 4.5). In addition, in 2008, the station implemented the manufacturer's recommended material changes intended to minimize part wear, and prevent potential actuator failures. Identification of Facility and Component: Oyster Creek Nuclear Generating Station / Electromatic Relief Valve Actuator, Dresser Valve Type 6 inches Model 1525-VX Identification of Component Manufacturer and/or Supplier: Dresser Industries. Nature of Defect: Inadequate design of the EMRV actuators in that when placed in an environment where the actuator is subject to the vibration associated with plant operation, the allowed installation tolerances between posts and guides can create a condition where the springs can jam the actuator plunger assembly by wedging between the guides and the posts. Safety Significance (e.g., substantial hazard that is or could be created): Identified condition is a Substantial Safety Hazard since it could cause EMRV to be inoperable, which could result in a loss of safety function. Date of Discovery of Initial Condition (taken from the IR): 06/20/14 Date of Discovery of the Substantial Safety Hazard (date of approval of the technical evaluation): 09/22/14 Recommended Actions: Change the design to mitigate the cause of the actuator parts (i.e., springs, guides and posts) interacting which results in unexpected wear due to vibration induced fretting. Number and Locations of All Defective Components: Two EMRVs located in the Drywell on the Main Steam piping. Any Advice Related to the Defect: Consider actuator design change if vibration conditions at the valve location results in unexpected wear of the EMRV actuators. Perform actuator as-found stroke testing before removal for refurbishment to determine in situ operability of the component. With current design, ensure posts are aligned such that preferential wear does not occur. Spring should be optimally centered on the guide and the post and guide should be equidistant around the full circumference of the bushing. Contacts (Name, Title, Location, Phone Number, etc.): Sylvain L. Schwartz, Senior Staff Engineer, Oyster Creek Nuclear Generating Station, Phone: (609) 971-4558, Email: sylvain.schwartz@exeloncorp.com The licensee notified the NRC Resident Inspector. Plants with similar Dresser EMRVs: Nine Mile Point, Quad Cities, and Dresden.
ENS 5047620 September 2014 07:42:00Oyster CreekNRC Region 1GE-2At approximately 2359 EDT a temporary modification plug was found to be removed from a floor drain in the Outboard MSIV Room (Trunnion Room). The purpose of the temporary modification plug is to ensure that secondary containment remains intact during outages where the trunnion room door is required to be open. The trunnion room door was open when the plug was found to be removed. The plug was immediately reinstalled, restoring the safety function of the secondary containment. Per (10 CFR) 50.72(b)(3)(v)(C), Oyster Creek is reporting an event that could have prevented the fulfillment of the safety function of a system needed to control the release of radioactive material. The licensee has notified the NRC Resident Inspector.
ENS 5027011 July 2014 05:17:00Oyster CreekNRC Region 1GE-2Today at approximately 0312 (EDT on 7/11/14), during a planned reactor power ascension with reactor power at approximately 55 percent of rated thermal power, main condenser vacuum began to lower. In accordance with the abnormal operating procedure for degrading vacuum, Operators inserted a manual scram of the reactor at 0314 (EDT). The cause of the degraded vacuum is currently under investigation. All rods inserted into the core and all systems functioned as expected during the scram. No electromatic (EMRVs) or safety relief valves lifted during the transient. This event is reportable within 4 hours per 10CFR50.72(b)(2)(iv)(B) - any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation. The scram was uncomplicated, normal offsite power is available, and plant is being cooled down to cold shutdown. The cause of the degraded condenser vacuum is suspected condenser boot degradation. The licensee has informed the NRC Resident Inspector.
ENS 502617 July 2014 22:12:00Oyster CreekNRC Region 1GE-2

On July 7, 2014 at approximately (2040 EDT), an issue was discovered with currently removed Electromatic Relief Valves (EMRVs) that calls the operability of the currently installed EMRVs into question. Based on this new information, all 5 of the currently installed EMRVs were conservatively declared inoperable. With the potential of 5 EMRVs inoperable a Technical Specification shutdown is required under Technical Specification 3.4.b, whereby reactor pressure shall be reduced to 110 psig or less within 24 hours. This event is immediately reportable under: 50.72(b)(2)(i), 'The initiation of any nuclear plant shutdown required by the plant's Technical Specifications.' 50.72(b)(3)(v)(D), 'Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to: (D) Mitigate the consequences of an accident.'" The licensee notified the NRC Resident Inspector. The licensee will notify the State of New Jersey and issue a press release.

  • * * RETRACTION AT 1745 EDT ON 7/11/2014 FROM CHARLES SPAGNUOLO TO MARK ABRAMOVITZ * * *

The original concern and July 7, 2014 EN (report) was caused by abnormal wear found on removed Electromatic Relief Valve actuators. However, on July 8, 2014, upon completion of in situ testing as well as visual examination of the installed EMRV actuators, it was determined that the 5 currently installed EMRVs were fully operable and capable of performing their safety function. Therefore, Oyster Creek is retracting the notifications made under 50.72(b)(2)(i) and 50.72(b)(3)(v)(D). The licensee notified the NRC Resident Inspector and the State will be notified. The licensee will be issuing a press release. Notified the R1DO (DeFrancisco).

ENS 5022023 June 2014 09:20:00Oyster CreekNRC Region 1GE-2

A planned maintenance evolution at the Oyster Creek Nuclear Generating Station has removed the dedicated phone line between Emergency Response Facilities and the NARS (Nuclear Accident Reporting System) line from service and will be rendered non-functional during the course of the work activities. Expected out of service time is approximately 82 hours from 0900 (EDT) 6/23/14 to 1900 (EDT) 6/26/14. If an emergency is declared requiring the use of emergency communication phone circuits a proceduralized alternative method will be used. This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii) for planned maintenance that impacts the emergency communications capability. An update will be provided when the dedicated phone line between Emergency Response Facilities and the NARS line has been restored to normal operation. The licensee has notified the NRC Resident Inspector.

  • * * UPDATE PROVIDED BY JOHN DEVENNEY TO JEFF ROTTON AT 1738 EDT ON 06/25/2014 * * *

At 1700 EDT on 6/25/14 planned maintenance is complete and the dedicated phone line between Emergency Response Facilities and the NARS line has been restored to normal operation. The licensee notified the NRC Resident Inspector. Notified R1DO (Bickett)

ENS 5014528 May 2014 11:26:00Oyster CreekNRC Region 1GE-2

At 1037 EDT on May 28, 2014 an Unusual Event (EAL HU5) was declared due to a release of toxic gas that could have adversely affected plant operations. The leak was due to a leak in pipe containing water and chlorine. The pipe has been isolated and the leak has stopped. The chlorine smell was initially noticed at approximately 1008 EDT. The leak was coming from a buried underground pipe. There were no personnel injuries or medical response needed. The licensee notified the NRC Resident Inspector, State, and local authorities. The licensee plans on issuing a press release. Notified DHS SWO, FEMA Ops Center, NICC Watch Officer, and Nuclear SSA via email.

  • * * UPDATE FROM ROBERT SALES TO CHARLES TEAL AT 1202 EDT ON 5/28/14 * * *

At 1140 EDT on 5/28/14 Oyster Creek has exited the Unusual Event. The leak has been isolated and is not affecting normal plant operations. The licensee notified the NRC Resident Inspector, State, and local authorities. The licensee plans on issuing a press release. Notified R1DO (Rogge), NRR EO (Chernoff), IRD MOC (Gott), DHS ASWO, FEMA Ops Center, NICC Watch Officer, and Nuclear SSA via email.

ENS 498694 March 2014 06:04:00Oyster CreekNRC Region 1GE-2

A planned maintenance evolution at the Oyster Creek Nuclear Generating Station has removed the Technical Support Center (TSC) ventilation system from service. The TSC ventilation system will be rendered non-functional during the course of the work activities. The TSC ventilation is expected to be out of service for approximately twenty hours from 0500 (EST) to 2400, today, March 4, 2014. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10CFR50.72(b)(3)(xiii) due to potential loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector has been notified.

 *  *  *  UPDATE AT 1532 ON 3/6/14 FROM SPAGNUOLO TO SNYDER  *  *  *

On 3/6/14 at 1532 EST the Technical Support Center was returned to service. Notified R1DO (Bower).

ENS 4985022 February 2014 19:32:00Oyster CreekNRC Region 1GE-2

(The New Jersey Department of Environmental Protection) and Ocean County Health (Department were) notified of a spill of approximately 1 cup of hydraulic fluid (oil) that leaked from a vehicle and entered a storm drain at approximately 1615 (EST). The licensee notified the NRC Resident Inspector.

  • * * RETRACTION FROM JEREMY SHARKEY TO CHARLES TEAL AT 1954 EST ON 2/27/14 * * *

Upon subsequent review of the Material Safety Data Sheet associated with the fluid that leaked from the vehicle, it was determined that the fluid was not a hazardous substance as defined by the State of New Jersey (Appendix A of N.J.A.C. 7:1E). Additionally, it was determined that the fluid did not reach surface water. Based on this information, the New Jersey Department of Environmental Protection (NJDEP) was notified that the fluid that leaked from the vehicle did not reach surface water and was not a hazardous substance. The NJDEP notification was updated for the record. For the above reasons, the 4 hour non-emergency ENS notification made under EN # 49850 is hereby retracted The NRC Resident Inspector has been informed. Notified R1DO (DeFrancisco).

ENS 4964818 December 2013 03:41:00Oyster CreekNRC Region 1GE-2Pursuant to 10CFR50.72(b)(3)(iv)(A), notifications are being performed for a valid actuation of the reactor protection system resulting in a full scram. The actuation was a result of the reactor mode switch being placed from the refuel position to the shutdown position without the scram bypass jumpers installed. The reactor was subcritical with all rods inserted at the time of the actuation. All systems functioned as designed. The licensee notified the NRC Resident Inspector.
ENS 4963314 December 2013 06:57:00Oyster CreekNRC Region 1GE-2Today at approximately 0337 (EST), during quarterly turbine valve testing with reactor power at 100% of rated thermal power, the plant experienced reactor pressure control abnormalities. Reactor pressure rose to 1042 psig (at which point) the Operators inserted a manual SCRAM. The cause of the rise in reactor pressure is currently under investigation. All control rods inserted into the core. Main steam isolation valves remained open, (however), bypass valves did not open as expected. The plant is in its normal electrical lineup and decay heat is being removed via isolation condensers. No electronic (EMRVs) or safety valves lifted during the transient. The plant is currently shutdown and all parameters are stable. This event is reportable within 4 hours per 10CFR50.72(b)(2)(iv)(B) - 'any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.' The licensee notified the NRC Resident Inspector and will be notifying the State.
ENS 4957021 November 2013 20:30:00Oyster CreekNRC Region 1GE-2Today, November 21, 2013, at approximately 1737 EST, the New Jersey Department of Environmental Protection (NJDEP) was notified that an indeterminate amount (less than 1 gallon) of sodium hypochlorite was spilled onto the lands of the State of New Jersey. The spill has been contained and cleaned-up. There was no actual or potential impact on the environment and no impact on the health and safety of the public or onsite personnel. The spill did not reach the federal reportable quantities limit. Due to notification of a government agency, this event is being reported under 10CFR50.72 (b)(2)(xi). The licensee informed the NRC Resident Inspector.
ENS 4954717 November 2013 22:37:00Oyster CreekNRC Region 1GE-2Station personnel simultaneously opened the inner and outer air lock doors from the reactor building to the reactor control enclosure (Reactor Building 23 foot elevation North West airlock). Reactor Building secondary containment integrity was declared INOPERABLE per TS 3.5.B.2 due to both containment airlock doors being momentarily open at the same time. Reactor Building D/P (differential pressure) remained less than negative 0.25 inches water column. Reactor Building secondary containment integrity was declared OPERABLE following verification that at least one airlock door to each access of secondary containment was closed per TS 3.5.B.2. Total LCO time was approximately 10 seconds. The NRC Resident Inspector has been informed.
ENS 495106 November 2013 22:12:00Oyster CreekNRC Region 1GE-2On November 6, 2013, at approximately 0800 hours (EST), a 40 oz. beer bottle containing what was believed to be 20 oz. of alcohol (beer) was discovered in the vicinity of the dilution plant trash raking system inside the protected area. The bottle was discovered during a routine tour and the finding was immediately reported to supervision. Based on the location of the bottle, the weathered condition of the bottle, and interviews with maintenance personnel who observed the bottle falling from the trash rake, it is known that the source of the bottle was the intake canal. The bottle was retrieved during automated raking evolutions and fell from the trash rake while the rake was in-transit to the dumpster. This report is submitted pursuant to 10 CFR 26.719 (b)(1) based on the presence of alcohol in the protected area. The licensee has notified the NRC Resident Inspector.
ENS 494146 October 2013 14:26:00Oyster CreekNRC Region 1GE-2Today at approximately 1040 (EDT), during a planned reactor power ascension with reactor power at approximately 20% of rated thermal power, main condenser vacuum began to lower. In accordance with the abnormal operating procedure for degrading vacuum, Operators inserted a manual scram of the reactor at 1130 (EDT). The cause of the degraded vacuum is currently under investigation. All rods inserted into the core and all systems functioned as expected during the scram. No electromatic (EMRVs) or safety relief valves lifted during the transient. The plant is currently shutdown and parameters are stable. The plant is in its normal shutdown electrical lineup and decay heat is being removed via steam bypass valves to the main condenser. This event is reportable within 4 hours per 10CFR50.72(b)(2)(iv)(B) - any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation. The licensee has notified the NRC Resident Inspector and will be notifying state authorities.
ENS 494043 October 2013 09:20:00Oyster CreekNRC Region 1GE-2At 0643 EDT (on 10/03/13), during reactor startup, with the reactor critical and power in the intermediate range, an automatic reactor scram occurred due to an invalid (noise) intermediate range monitor (IRM) scram signal processed on both RPS trip systems. All control rods fully inserted and plant response was as expected. This notification is in accordance with 10CFR50.72(b)(2)(iv)(B). The reactor is currently subcritical. When the reactor scram occurred, reactor power was below the Point of Adding Heat and had minimal effect on the plant. Normal offsite power is being maintained. Decay heat is being maintained via normal shutdown cooling. The Licensee has notified the NRC Resident Inspector.
ENS 4922129 July 2013 13:31:00Oyster CreekNRC Region 1GE-2A non-licensed, supervisory employee had a confirmed positive for alcohol during a random fitness-for-duty test. The employee's access to the plant has been restricted. The licensee notified the NRC Resident Inspector.
ENS 4920017 July 2013 17:36:00Oyster CreekNRC Region 1GE-2Today, July 17th, 2013, at approximately 1605 EDT, the New Jersey Department of Environmental Protection was notified that approximately 1 pint of sodium hypochlorite was spilled onto the lands of the State of New Jersey. The spill has been contained and cleaned-up. There was no actual or potential impact on the environment and no impact on the health and safety of the public or onsite personnel. Due to notification of a government agency, this event is being reported under 10CFR50.72 (b)(2)(xi). The spill did not reach the federal reportable quantities limit. The licensee has notified the NRC Resident Inspector.
ENS 4886128 March 2013 10:15:00Oyster CreekNRC Region 1GE-2

A planned maintenance evolution at the Oyster Creek Generating Station has removed the Technical Support Center (TSC) ventilation system from service. The TSC ventilation system will be rendered non-functional during the course of the work activities. The TSC ventilation is expected to be out of service for approximately fourteen hours and will return to service at approximately 2200 (EDT) March 28, 2013. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10CFR50.72(b)(3)(xiii) due to potential loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The licensee informed the NRC Resident Inspector.

  • * * UPDATE FROM ERIC SWAIN TO HOWIE CROUCH AT 1245 EDT ON 3/29/13 * * *

The TSC ventilation system was returned to service at 1240 EDT. The licensee has notified the NRC Resident Inspector. Notified R1DO (Krohn).

ENS 486578 January 2013 07:05:00Oyster CreekNRC Region 1GE-2

A planned maintenance evolution at the Oyster Creek Nuclear Generating Station has removed the Technical Support Center (TSC) ventilation system from service. The TSC ventilation system will be rendered non-functional during the course of the work activities. The TSC ventilation is expected to be out of service for approximately thirty six hours from 0505 (EST) to 1700, tomorrow, Jan 9, 2013. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10CFR 5O.72(b)(3)(xiii) due to potential loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC resident has been notified.

  • * * UPDATE AT 0258 ON 1/9/2013 FROM JIM RITCHIE TO MARK ABRAMOVITZ * * *

TSC ventilation was returned to service at 0230 EST. The licensee will notify the NRC Resident Inspector. Notified the R1DO (Newport).

ENS 4853727 November 2012 00:02:00Oyster CreekNRC Region 1GE-2Pinhole leak discovered on a Reactor Head Spray line weld during Nuclear Steam Supply System Leak Test. Oyster Creek Nuclear Generating Station is currently in the Shutdown Condition executing Refueling Outage 1R24, which includes Nuclear Steam Supply System (NSSS) Leak Testing, prior to startup. At 1930 on 11/26/2012, a pinhole leak was discovered on a Reactor Head Spray Class 1 piping weld. The leak was discovered during the NSSS Leak Test, while the Reactor was in the Shutdown Condition. The leak is on a flange to piping weld on the Reactor Head Spray system upstream of the N-7B nozzle. Water was found to be weeping from the pinhole leak (approximately 2 to 3 drops per minute). The cause is under investigation and corrective action plans are being developed. The leak has been evaluated by Exelon and determined to meet the criteria for reporting identified in NUREG-1022: Welding or material defects in the primary coolant system that cannot be found acceptable under ASME Section XI, IWB-3600, 'Analytical Evaluation of Flaws,' or ASME Section XI, Table IWB-3410-1, 'Acceptable Standards.' The NRC Resident Inspector has been informed.
ENS 484958 November 2012 16:55:00Oyster CreekNRC Region 1GE-2Prior to 1020 EST on November 8, 2012, 4 out of 42 Emergency Planning Zone (EPZ) Sirens remained inoperable, due to issues caused by Hurricane Sandy. At 1020 on November 8, 2012, Oyster Creek was notified by ANS, the provider of Exelon siren maintenance, that due to the recent snow storm, 11 out of 42 sirens in the Oyster Creek Emergency Planning Zone were inoperable. 11 out of 42 sirens exceeds Exelon's reporting threshold of 25 percent or more sirens out of service. Therefore, an 8-hour report is required under 10 CFR 50.72(b)(3)(xiii) due to a 'Loss of Emergency Preparedness Capabilities.' Prior to the submission of this report, Oyster Creek was notified by ANS that 4 of the 11 inoperable sirens were returned to service. The licensee will notify the NRC Resident Inspector.
ENS 484917 November 2012 20:18:00Oyster CreekNRC Region 1GE-2Oyster Creek Nuclear Generating Station is currently in Cold Shutdown executing Refueling Outage 1R24, which includes in-service inspections. At 1240 EST, General Electric notified Oyster Creek Management of surface indications that were detected by dye penetrant testing. The indications are in the adjacent base material area of the System Pressure Boundary weld. The indications are located Top Dead Center (TDC) of the 3 inch pipe. Indication #1 is upstream 0.7 inches away from the weld toe, the indication is 1.5" long. Indication #2 is downstream 0.2 inches away from the weld toe, the indication is 2.5" long. The depth of the indications are unknown at this time. Initial investigation revealed that there was no moisture or leakage found in the area of the indications. Further investigation is in progress to better characterize the indications. The cause is under investigation and corrective action plans are being developed. The surface defects have been evaluated by Exelon and determined to meet the criteria for reporting identified in NUREG-1022: Welding or material defects in the primary coolant system that cannot be found acceptable under ASME Section XI. IWB-3600, 'Analytical Evaluation of Flaws,' or ASME Section XI, Table IWB-3410-1, 'Acceptable Standards'. The NRC Resident Inspector has been informed.
ENS 4846031 October 2012 00:07:00Oyster CreekNRC Region 1GE-2(The licensee) notified National Marine Fisheries Service per OC-08 that Oyster Creek has been unable to use the dilution and intake trash rake for greater than 24 hours due to safety concerns and loss of power. Daily manual raking of intake and dilution is in progress. The licensee informed the NRC Resident Inspector.
ENS 4845229 October 2012 19:18:00Oyster CreekNRC Region 1GE-2

At 1855 EDT on 10/29/2012, the licensee declared a Notice of Unusual Event (NOUE) per criteria HU4 for high water level in the station intake structure of greater than 4.5 feet. At the time of the notification, water level in the intake structure was approximate 4.8 feet and slowly rising. The cause of the increased water level was due to storm surge associated with Hurricane Sandy. No other station impacts were reported at the time. The licensee continues to monitor the intake levels and ocean tides. The licensee has notified the NRC Resident Inspector and the State of New Jersey.

  • * * ALERT UPDATE ON 10/29/2012 AT 2141 EDT FROM STEVE SERPE TO RYAN ALEXANDER * * *

At 2044 EDT on 10/29/2012, the licensee escalated its emergency declaration to an Alert per criteria HA4 for high water level in the station intake structure of greater than 6.0 feet. At the time of the notification, water level in the intake structure was approximately 6.6 feet. The site also experienced a loss of offsite power event concurrent with the additional water level increase. Both emergency diesel generators started and are supplying power to the emergency electrical busses. Shutdown cooling and spent fuel pool cooling have been restored. Reactor pressure vessel level is steady at 584.7 inches. Intake levels continues to rise slowly and the licensee is monitoring. The licensee has notified the NRC Resident Inspector and the State of New Jersey. Notified DHS SWO, FEMA Ops Center, USDA Ops Center, HHS Ops Center, DOE Ops Center, DHS NICC Watch Officer, EPA EOC, and NuclearSSA via e-mail.

  • * * UPDATE on 10/30/12 at 0414 EDT FROM GILBERT DEVRIES TO RYAN ALEXANDER * * *

The licensee updated this report with an 8-hour non-emergency notification of emergency diesel generator auto-actuation due to the actual loss of off-site power event (which occurred at 2018 EDT on 10/29/2012). This event caused a valid RPS actuation with automatic containment isolations that resulted in a temporary loss of shut-down cooling to the reactor. Shutdown cooling was subsequently restored with power provided by the emergency diesel generators. The licensee has notified the NRC Resident Inspector. Notified R1DO (Caruso).

  • * * UPDATE AT 0357 EDT ON 10/31/12 FROM GILBERT A. DeVRIES TO S. SANDIN * * *

Termination of Alert. The Oyster Creek Station has terminated the Alert that was declared at 2044 (EDT) on 10/29/12 due to Intake Structure high water level greater than 6.0 ft. MSL (EAL HA4). Intake water level has returned to normal and is now below the Unusual Event EAL threshold (4.5 ft. MSL) and continues to lower. The licensee informed state and local agencies and the NRC Resident Inspector. Notified Region I IRC (Clifford), NRR (Evans), and IRD (Marshall). Notified DHS SWO, FEMA Ops Center, USDA Ops Center, HHS Ops Center, DOE Ops Center, DHS NICC Watch Officer, EPA EOC, and NuclearSSA via e-mail.

ENS 4845029 October 2012 16:15:00Oyster CreekNRC Region 1GE-2

On October 29, 2012, at approximately 1500 EDT, ANS, the licensee's provider of siren maintenance, reported a loss of 12 out of 43 sirens in the Oyster Creek Emergency Planning Zone, which exceeded the licensee's reporting threshold of 25 percent or more sirens out of service. At 1600 EDT, ANS, updated that the number of sirens out of service was 21 out of 43 sirens. ANS and the licensee continues to work to rectify the issue. The NRC Resident Inspector will be notified.

  • * * UPDATE ON 10/30/12 AT 0428 EDT FROM JOHN CLARK TO RYAN ALEXANDER * * *

As of 0320 EDT on 10/30/12, it was determined that 36 of the 43 Emergency Planning Zone sirens were out of service, and the licensee continues work to rectify the issue. The NRC Resident Inspector will be notified. Notified R1DO (Caruso) and IRD (Marshall).

ENS 4812523 July 2012 04:24:00Oyster CreekNRC Region 1GE-2

At 0329 EDT, Oyster Creek experienced a loss of offsite power. As a result of the loss of offsite power, the unit automatically scrammed from 100% with all control rods fully inserting and all safety systems functioning as required. Both Emergency Diesel Generators automatically started and are carrying loads on the safety buses. At 0341 EDT, Oyster Creek declared an Unusual Event based on a loss of offsite power for greater than 15 minutes. The unit is stable in Hot Shutdown with decay heat removal via the Isolation Condenser. The cause of the loss of offsite power is currently under investigation by JCP&L. The licensee notified the State and local agencies, as well as the NRC Resident Inspector. The licensee will be making a press release.

  • * * UPDATE ON 7/23/12 AT 0625 EDT FROM ROBERT SALES TO DONG PARK * * *

Oyster Creek has terminated from the loss of offsite power Unusual Event (at 0538 EDT). All safety systems functioned as expected for this event. The licensee has notified the NRC Resident Inspector. Notified R1DO (Dimitriadis), NRR EO (Nieh), IRD (Gott), DHS SWO, FEMA, and DHS NICC.

  • * * UPDATE ON 7/23/12 AT 1205 EDT FROM ANDREW ZUCHOWSKI TO VINCE KLCO * * *

As a result of the loss of offsite power, both Emergency Diesel Generators automatically started and carried loads on the safety buses, as required. Offsite power was returned to service at 0457 EDT and both Emergency Diesel Generators were secured at 0520 EDT. Per 50.72(b)(3)(iv)(A), Oyster Creek is reporting any event or condition that results in valid actuation of an Emergency AC electrical power system. Additionally, the Reactor Building (Secondary Containment) differential pressure indicated positive 0.25 inches W.G. at approximately 0357 EDT. Reactor Building differential pressure indication returned to normal at 0434 EDT. Oyster Creek is currently investigating the cause of the positive Reactor Building pressure indication. Per 50.72(b)(3)(v)(C), Oyster Creek is reporting an event that could have prevented the fulfillment of the safety function of a system needed to control the release of radioactive material. The licensee notified the NRC Resident Inspector. Notified R1DO (Gray).

  • * * UPDATE AT 0914 EDT ON 9/12/12 FROM ERIC SWAIN TO HUFFMAN * * *

As a result of further investigation it was found that the Reactor Building Differential Pressure issue was an indication issue only and not indicative of a loss of the secondary containment barrier. The positive indication was caused by a degradation of instrument air pressure to the instrument used to generate the differential pressure indication. The degradation of instrument air pressure was an expected condition caused by the loss of offsite power. Alternate indication, not affected by instrument air pressure, was available throughout the event. The alternate indication read negative 0.4 Inches water gauge throughout the event. Based on this information Oyster Creek is retracting the portion of this report that was reported per 50.72(b)(3)(v)(C), an event that could have prevented the fulfillment of the safety function of a system needed to control the release of radioactive material. The licensee has notified the NRC Resident Inspector. R1DO (Newport) notified.

ENS 4810213 July 2012 14:20:00Oyster CreekNRC Region 1GE-2

At 12:00 on July 13, 2012 it was determined, during a conference call with the Exelon siren vendor, that Oyster Creek emergency planning zone (EPZ) sirens may be unreliable. The unreliability is being caused by an intermittent signal on the frequency used to activate the sirens. Therefore, an 8-hour report is required under 10 CFR 50.72(b)(3)(xiii) due to a potential 'Loss of Emergency Preparedness Capabilities.' Additionally, Exelon is contacting the Federal Communications Commission (FCC) for troubleshooting and reporting purposes, as well as, the New Jersey Office of Emergency Management (NJ OEM) and the Ocean County Office of Emergency Management to institute compensatory actions. Due to contacting other government agencies a 4-hour report is required per 10 CFR 50.72(b)(2)(xi). Exelon will notify the NRC Operations Center upon full-restoration of the Oyster Creek EPZ siren system. The NRC Resident Inspector has been informed.

  • * * UPDATE AT 2110 EDT ON 7/14/12 FROM CLARK TO HUFFMAN * * *

As of 2058 EDT on July 14, the licensee has declared that all 42 sirens have been restored to a reliable status. The siren vendor has shifted the activation frequency to avoid the interference. The vendor is still working with the FCC to determine the cause of the interference signal at the original frequency. The licensee has notified the NRC Resident Inspector. R1DO (Doerflein) notified.

ENS 4805227 June 2012 20:16:00Oyster CreekNRC Region 1GE-2At 1630 EST, Exelon was notified by the NJ State OEM (Office of Emergency Management) that Oyster Creek Emergency Preparedness Siren #25, located in Harvey Cedars, NJ, was inadvertently actuated at 0209 EST and sounded for a period of 2-3 minutes. The siren was inadvertently actuated by Atlantic City Electric when restoring power to the siren. No actual plant emergency existed. Siren #25 and all other of the 42 sirens remain functional. No other reportability thresholds have been met or exceeded. State and local authorities were also notified. The licensee will notify the NRC Resident Inspector.
ENS 4802414 June 2012 09:53:00Oyster CreekNRC Region 1GE-2At 0607 hrs. EDT, a vehicle struck a pole on Route 9, immediately in front of the site, causing a loss of power to the Technical Support Center (TSC). At 0615 hrs., the Fire Brigade was dispatched to investigate reports of a 'smoldering' transformer behind the Site Emergency Building (SEB) and Oyster Creek Administration Building (OCAB.) At approximately 0708 hrs., the on-scene Fire Brigade Leader called the local fire department, because, in his determination, it was an event or situation that was related to the health and safety of the onsite personnel. At 0717 hrs., the local fire department came on-site in response to the call. Upon investigation, it was found that the transformer was smoking due to overheating. There was no fire and no Emergency Action Level (EAL) was applicable for this event. Due to the notification and response of the local fire department, a 4-hour report is required per 10CFR50.72(b)(2)(xi). At 0731 hrs., power was restored to the TSC and the TSC was restored to a fully operable condition. Due to the loss of the power to the TSC for greater than one hour (time required for TSC staffing), an 8-hour report is required in accordance with 10CFR50.72(b)(3)(xiii). The NRC Senior Resident was on-site and notified of the event.
ENS 4774615 March 2012 08:32:00Oyster CreekNRC Region 1GE-2

A planned maintenance evolution at the Oyster Creek Nuclear Generating Station will remove the Technical Support Center (TSC) ventilation system from service. Therefore, the TSC ventilation system will be rendered non-functional during the course of the work activities. The TSC ventilation is expected to be out of service for approximately six hours from 0800 (EDT) to 1400 today. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. This notification is being made in accordance with 10CFR 50.72(b)(3)(xiii) due to potential loss of the TSC. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC resident has been notified.

  • * * UPDATE FROM JOHN CLARK TO VINCE KLCO AT 1109 EDT ON 3/15/2012 * * *

The TSC was restored to service on March 15, 2012 at 1107 EDT. The licensee will notify the NRC Resident Inspector. Notified the R1DO (Krohn)

ENS 4752012 December 2011 18:06:00Oyster CreekNRC Region 1GE-2At 1447 (EST) Oyster Creek experienced a failure of a discharge flange on a fire protection pond pump. The fire system backup fire diesel started in response to low system pressure. At 1540 (EST), it was noted that the fire diesel had higher than expected opacity from its exhaust. High exhaust opacity (equal to or greater than 20% for more than 3 minutes in any consecutive 30 minute period) is reportable to the State of New Jersey in accordance with the Auxiliary Boiler Air Pollution Control Permit. At 1650 (EST), high opacity from the fire diesel was reported to the State of New Jersey via the NJ Department of Environmental Protection hotline. In accordance with 10 CFR 50.72 (b)(2)(xi) this event is being reported due to Offsite Notification. The licensee has notified the NRC Resident Inspector.
ENS 4721328 August 2011 11:13:00Oyster CreekNRC Region 1GE-2Oyster Creek has lost 10 sirens in the Emergency Plan Zone. Communications with the Ocean County Office of Emergency Management has been conducted to inform them of the outage. The licensee has notified the NRC Resident Inspector.