Semantic search
| Entered date | Event description | |
|---|---|---|
| ENS 52861 | 14 July 2017 21:44:00 | 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.
TSC ventilation was restored at 0128 EDT on 07/15/17. The licensee will inform the NRC Resident Inspector. Notified R1DO (Dimitriadis). |
| ENS 52230 | 9 September 2016 12:55:00 | Oyster 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 50524 | 12 October 2014 05:22:00 | 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.
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 49869 | 4 March 2014 06:04:00 | 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). |