Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 53101 | 30 November 2017 21:57:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to Earthquake | An Unusual Event was declared at 1657 EST due to an earthquake detected onsite. The Unusual Event was declared under EAL HU1.1. There is no release in progress due to this event. There are no protective actions recommended at this time. The Licensee will notify the NRC Resident Inspector. Note: See also EN #53099 for Salem Unusual Event.
An earthquake was felt onsite at time 1645 EST. Multiple phone calls were made to the Control Room confirming the earthquake. It was verified there was an earthquake felt in Delaware with a magnitude of 4.4. Neither seismic monitor at Salem Unit 1, Salem Unit 2, and Hope Creek actuated. There is no indication of any damage to any systems or plant structures. Plant walk-downs have been initiated in accordance with plant operating procedures for a seismic event. No injuries have been reported to the Control Room. The licensee will notify the NRC Resident Inspector and State and local government agencies. Notified R1DO (Gray), DHS SWO, FEMA Operations Center, DHS NICC, FEMA NWC (email), and DHS Nuclear SSA (email).
The licensee terminated the Unusual Event at 2125 EST on 11/30/2017 following plant walkdowns that revealed no damage to plant structures, systems, or components. The NRC Resident Inspector has been notified. Notified R1DO (Gray), IRD (Grant), and NRR EO (Miller), DHS SWO, FEMA Operations Center, DHS NICC, FEMA NWC (email), and DHS Nuclear SSA (email). | ||
| ENS 48947 | 19 April 2013 19:18:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Notification of Unusual Event Declared Due to Inability to Confirm a Fire in the Protected Area within 15 Minutes | Fire within the Protected Area not verified within 15 minutes. Emergency Action Level HU 2.1 declared at 1518 EDT. Confirmation of no fire completed at 1526 EDT. The fire alarm occurred in the Rad Waste Building. Due to the location of the alarm, the licensee was not able to validate alarm within 15 minutes which led to the emergency declaration. Once access to the area was obtained, there was no fire observed. The cause of the inadvertent fire alarm is under investigation. The licensee has notified Lower Alloways Creek Township, the State of New Jersey, the State of Delaware and the NRC Resident Inspector. Notified DHS, FEMA, NICC and NuclearSSA via email.
At 1725 EDT, the licensee terminated the Notification of Unusual Event. The affected fire alarm was placed out of service and a fire watch has been established. The licensee has notified Lower Alloways Creek Township, the State of New Jersey, the State of Delaware and the NRC Resident Inspector. Notified R1DO (Cook), IRD (Grant), NRR EO (Skeen), DHS, FEMA, NICC, and NuclearSSA via email. | ||
| ENS 47192 | 23 August 2011 18:00:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Notification of an Unusual Event Due to a Seismic Event | On 8/23/11 at 1400 hrs. EDT, Hope Creek and Salem generation stations declared a common site Unusual Event in accordance with EAL 9.5.1.a, due to an earthquake felt by onsite personnel within the protected area. The plant is operating at 100% power with no significant anomalies noted. Walkdowns of safety related areas are currently in progress. All ECCS systems are available and in standby alignment. The licensee has notified the NRC Resident Inspector and state and local authorities. (See also EN #47191).
Initial walkdowns are complete with no anomalies noted. Detailed walkdowns of all rooms and areas are in progress with estimated completion time of 1900 hrs. The licensee has notified the NRC Resident Inspector. Notified R1 IRC (Dentil).
Hope Creek and Salem have terminated their Notification of Unusual Event. The licensee has notified the NRC Resident Inspector and state and local authorities. Notified R1DO (Krohn), IRD (Morris), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner). | ||
| ENS 44442 | 28 August 2008 08:47:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event - Internal Flooding in Service Water Intake Structure | Licensee entered into Unusual Event due to EAL 9.7.1, which is internal flooding in excess of sump handling capability affecting safety related areas of the plant. Failure of the sump pump level switches in the active Service Water Intake Structure (SWIS) bay resulted in several inches of water on the floor and receipt of a SWIS 'Pump Room Flooded' alarm. There was no excessive leakage from the service water system and no damage to safety related systems in the room. Sump pumps are now operating and level in the SWIS bay is lowering. All safety related systems are operable except for the 'A' Diesel Area Panel Room Supply Fan, which is cleared and tagged for scheduled maintenance. Licensee will notify the NRC Resident Inspector and has notified the states of New Jersey and Delaware and the local township.
At 0736 EDT the licensee terminated the Unusual Event. The SWIS sump pumps are working as designed using the sump pump level switch. The sump pumps are running and lowering level (approximately 0.75 inches remains on the SWIS floor). The licensee has notified the State of New Jersey and Delaware Emergency Response organizations and will be notifying the NRC Resident Inspector. Notified R1DO (Powell), NRR EO (Thorp), IRD MOC (McDermott), DHS (McKentry), and FEMA (Sweetser). | Service water | |
| ENS 41753 | 7 June 2005 18:37:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to Unidentified Drywell Leakage Greater than 10 Gpm | Hope Creek manually scrammed the reactor from 100% power at 1413 and declared an Unusual Event due to unidentified drywell leakage exceeding 10 gpm (EAL 2.1.1.b) at 1437. The drywell unidentified leak rate peaked at approximately 15 gpm and is currently 12 gpm and slowly lowering. All safety systems were operable prior to the transient and responded as expected. Drywell pressure peaked at approximately 0.5 psig and is steady using normal drywell cooling (the normal pressure band is 0.1 to 0.7 psig). Drywell and suppression pools sprays were not required to mitigate the drywell pressure transient. Reactor vessel level lowered to approximately -30 inches following the scram and was returned to the normal level band using the feedwater and condensate systems. The expected vessel level 3 (setpoint +12.5 inches) ESF actuations occurred. The plant is proceeding to cold shutdown to investigate the drywell leak. The licensee notified the NRC Resident Inspector.
As of 0330, Region I IRC in consultation with NRC/IRD (McGinty) secured from Monitoring Mode based on the plant being stable at about 55 psig (about 300 degrees F) and preparing to initiate shutdown cooling. The leak rate remains at about 8 gpm, and an initial drywell entry determined the source of the leakage to be from the A-loop of shutdown cooling testable check valve (50A ). The valve was found with the position indication failed/separated and an approximate 20 foot plume of steam/liquid coming out. Plans are to continue to cool down the plant, go onto the B-loop of shutdown cooling , and isolate valve 50A. The licensee has conservatively remained in the UE and plans to exit when leak rate is assured to remain below 10 gpm (EAL entry condition) or cold shutdown is achieved and the EAL is no longer applicable. The licensee's outage center remains manned, and an NRC inspector remains on site around the clock. DHS (Hoisington), FEMA (Sweetser), DOE (Turner) EPA (Crews), USDA (Pimmons), HHS (Williams) were notified.
The licensee has placed RHR loop B into service and reached Mode 4 (cold shutdown) at 0455. Preparations are in progress to isolate the leak by closing manual valve 183.
The licensee terminated the Unusual Event at 0515 EDT based on reaching cold shutdown with the leak rate less than 10 gpm. The licensee notified the NRC Resident Inspector. DHS (Hoisington) and FEMA (Sweetser), R1D0 (Jackson), NRR EO (Hannon), and IRD (Leach) notified.
On the morning; of 06/08/05, investigation into a previously reported increase in unidentified drywell leakage (Event #41753) identified the leak location as the F050A residual heat removal (RHR) check valve. The F050A check valve is on the return line to the 'A' recirculation loop,. The F050A check valve was isolated at approximately 0545 hours. The position indication magnatrol assembly for the F050A check valve appears to be the source of the leakage. Additional investigation is proceeding to identify the exact location of the leak as well as address the structural integrity of the valve. This updated report is being made in accordance with 10CFR50.72(b)(3)(ii). At the time of this notification Hope Creek Generating station is in OPCON 4 (Cold Shutdown) at 122 degrees reactor coolant temperature. The licensee notified the NRC Resident Inspector. R1DO (Jackson) and NRR EO (Jung) notified. | Feedwater Shutdown Cooling Residual Heat Removal | |
| ENS 41155 | 28 October 2004 14:03:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to a Toxic Gas Release in the Security Center | At 1003 (hrs) on October 28, 2004, an Unusual Event was declared at the Hope Creek Generating Station in accordance with EAL 9.4.1.b due to an uncontrolled release of freon gas from a chiller located in the top floor of the PSEG Nuclear Security Center. Although the top floor of the security center is a normally locked security area, access restrictions to the top floor of the security center were imposed by the Site Protection (or Fire) Department with breathing apparatus required. This was due to freon concentrations of 2000 ppm at the site of the leak, which exceed the threshold limit value of 1000 ppm. No injuries resulted from the freon leak and no access restrictions were imposed to the main entry/exit level of the security center or the basement (where maximum freon levels were 100 ppm or 10% of the TLV and 1000 ppm respectively). The TLV represents a concentration acceptable for 40 hrs per week, 50 weeks per year occupancy. As of 1040 (hrs) freon levels in the top floor of the security center are 0 ppm. The licensee informed state/local agencies and the NRC Resident Inspector.
Hope Creek secured from Unusual Event at 1316. The leakage has stopped, the machine has been evacuated of freon and normal personnel access has been restored. The licensee notified the NRC Resident Inspector. Notified R1 (R. Blough), NRR (T. Reis), IRD (P. Wilson), DHS (A. Costa and M. Cohen), and FEMA (K. Sweetser). |