Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 49189 | 15 July 2013 04:29:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to Loss of Control Room Annunciators | The licensee declared a Notice of Unusual Event resulting from a loss of control room annunciators for greater than 15 minutes. The EAL Condition is SU 4.1. Compensatory measures have been established per Abnormal Operating Procedures. The plant continues to operate at 100 percent power. The licensee has called for support staff to troubleshoot the issue. No other major components are out of service. The licensee has notified the NRC Resident Inspector. Notified DHS SWO, FEMA, DHS NICC and the Nuclear SSA via email. * * * UPDATE FROM KEVIN O'ROURKE TO PETE SNYDER AT 0205 EDT ON 7/15/13 * * * Annunciator indication has returned for some time and appears to be working. Engineering and electrical instrumentation and control staff are onsite to troubleshoot but have not established any cause. The licensee remains in the Unusual Event until additional confidence can be established in annunciator indication. Notified R1DO (Cook).
The NOUE declared on July 15, 2013 at 0029 EDT hours due to loss of main control room annunciation was terminated on July 16, 2013 at 2310 EDT hours when the annunciation system was declared functional. Plant personnel and vendors have completed diagnostic checks and testing, system voltages are normal, and the annunciator system is working normally. The licensee has notified the NRC Resident Inspector. Notified R1DO (Gray), NRR EO (Hiland), IRD MOC (Grant), DHS SWO, FEMA, DHS NICC and the Nuclear SSA via email. | ||
| ENS 48736 | 9 February 2013 03:00:00 | 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to Loss of Offsite Power | Pilgrim Station scrammed on a loss of offsite power. All systems performed as designed. Groups I, II, VI went to completion. Reactor Core Isolation Cooling (RCIC) is injecting to the vessel controlling level. High Pressure Coolant Injection is in pressure control and slowly cooling down. Offsite power was lost multiple times. The Startup Transformer has been declared inoperable. The Unusual Event was declared under EAL SU 1.1 based on loss of offsite power greater than 15 minutes (at 2200 EST). The licensee originally experienced an automatic reactor scram at 2117 EST due to a load reject with a turbine trip/reactor scram due to loss of power. Offsite power availability has been fluctuating in and out to the site. The licensee states that all systems are functioning as required. All rods fully inserted and the reactor is stable in Mode 3. Both Emergency Diesel Generators are providing power to the safety related buses. The loss of offsite power is believed to be weather related. The licensee has notified the State and local authorities and the NRC Resident Inspector. Notified DHS SWO, FEMA, USDA, HHS, DOE, DHS NICC, EPA, and NuclearSSA via email.
Pilgrim terminated the Unusual Event and has transitioned to recovery effective at 10:55 AM on 02/10/2013. Offsite power has been restored to safety-related and non-safety-related electrical buses through the station Startup Transformer via a single 345 KV line. The other two offsite power sources remain out of service. The emergency diesel generators have been secured and are in standby. Residual heat removal is in shutdown cooling mode maintaining the reactor in cold shutdown. Fuel Pool Cooling is in service with fuel pool coolant temperatures trending down. The licensee notified State, local authorities and the NRC Resident Inspector. Notified R1 RA (Dean), R1DO (Powell), NRR DIR(Leeds) NRR EO (Evans) and NSIR IRD (Marshall). Notified DHS SWO, FEMA, USDA, HHS, DOE, DHS NICC, EPA, and NuclearSSA via email. | High Pressure Coolant Injection Emergency Diesel Generator Reactor Core Isolation Cooling Shutdown Cooling Residual Heat Removal | |
| ENS 48669 | 12 January 2013 14:50:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to Potential Security Event | On Saturday, January 12, 2013 at 0925 hours (EST), with the reactor shutdown at 0% core thermal power, a security threat was reported. Security personnel took action to investigate the threat and implemented appropriate protective actions as required per security procedures. Based on this security event, the Shift Manager activated the Emergency Plan and made notification of an Unusual Event at 0950 hours. As a result, the Emergency Response organization was notified and activated. At 1001 hours, the NRC and applicable state and local authorities were notified via the Emergency Notification System (ENS). At 1050 hours, Security and applicable local law enforcement agency officials completed immediate investigations and determined that the security threat was not credible and was the result of local duck hunters on a small watercraft near the plant site. At 1105 hours, the Emergency Director terminated the Unusual Event. The Senior Resident Inspector was on-site and has been informed of this event and associated offsite notification. The licensee has notified appropriate state and local authorities as required per Emergency Planning and other site specific procedures. A press release was also issued. This notification is being made in accordance with 10CFR50.72(b)(2)(xi). Notified the DHS SWO, FEMA and DHS NICC.
This is an informational update to notification EN# 48669 based on completion of the post event Emergency Planning review. Our initial notification contained the following documentation error: At 1001 hours, the NRC and applicable State and Local authorities were notified via the Emergency Notification System (ENS). This statement is corrected as follows: 'At 1001 hours, State and Local authorities were notified via the Dedicated Notification Network (DNN). At 1025 hours, the NRC was notified via the Emergency Notification System (ENS).' The Resident Inspector has been informed of this event update. Notified R1DO (Ferdas). | ||
| ENS 44611 | 30 October 2008 00:50:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event - Fire in Hp Calibration Lab | At 2050 EDT a fire was discovered on the 2nd floor of an outbuilding inside a Health Physics calibration lab inside the protected area. The fire was reported as starting in a "drawer or cabinet" in the room. Plymouth Fire Department was notified and responded along with the on-site fire brigade. An Unusual Event was declared at 2058 EDT. The fire was extinguished at 2109 EDT. A re-flash watch was established. Electrical breakers to the room were opened. Health Physics personnel determined that no sources had been impacted by the fire and that no radiological concerns existed. The licensee notified the Commonwealth of Massachusetts and local authorities. The licensee notified the NRC Resident Inspector.
The licensee has terminated the Unusual Event as of 2202 EDT on 10/29/2008. The licensee notified the NRC Resident Inspector. |