Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 47550 | 23 December 2011 13:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Response Data System Out of Service | At 0500 PST 12/23/2011, ERDS communication VPN (Virtual Private Network) link with the NRC was interrupted during an automatic swap between computer servers. Restoration of the communication link is expected to be restored by 1430 PST. The licensee will notify the NRC Resident Inspector. | Emergency Response Data System | |
| ENS 46711 | 30 March 2011 14:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Sirens Out of Service Due to Inadvertent Securing of Power | City of San Clemente inadvertently secured power to 19 Community Alert Sirens. Trouble alarms were received at 0700 (PDT) but it is not known at what time specifically power was removed. All sirens were functional the day before when an inspection was performed on 3/29/2011 at 1213 (PDT). Power was restored to the sirens at 1145 (PDT) 3/30/2011. This event resulted in 20 community sirens being non-functional for greater than 1 hour. Siren State Parks 4 (SP-4) was also non-functional for unrelated reasons and remains out of service. Power was restored and all but the state park siren capabilities were declared operable. The licensee notified the NRC Resident Inspector. | ||
| ENS 46503 | 22 December 2010 03:32:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Access to Primary Emergency Operations Facility Not Possible Due to Road Flooding | Notified by the Security Shift Commander at 1932 (PST) that access to the primary EOF is not possible due to flooding. San Onofre will activate the alternate EOF if an event is declared. There are no other affected systems or loss to emergency response capabilities due to this flooding. Access to the site has not been impacted due to the flooding. The NRC Resident Inspector has been notified. See similar report #46499. | ||
| ENS 45714 | 21 February 2010 16:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Planned Power Outage at Primary Emergency Operations Facility (Eof) | Southern California Edison has planned work scheduled for the San Onofre Emergency Operations Facility (EOF), for Sunday, February 21, 2010. The work is being done in order to replace a faulty circuit breaker and will result in area lighting being out in the building from approximately 0800 through 1600. During the time that the lighting is out, the EOF will be considered non-functional. Should conditions occur that would merit activation, EOF responders would be directed to the alternate EOF located in Irvine, CA. This planned EOF outage is being reported in accordance with 10 CFR 50.72(b)(3)(xiii). The licensee has notified the NRC Resident Inspector.
Follow up phone call to one made on 2/19/10 regarding planned power outage at normal EOF. Commenced 1145 (PST) today (2/21); restored 1715 (PST). The licensee will notify the NRC Resident Inspector. Notified R4DO (Miller) | ||
| ENS 45634 | 19 January 2010 03:50:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Operations Facility Inaccessible Due to Road Flooding | On January 18, 2010, at about 1950 PST, the access road to the SONGS MESA facilities became flooded after a day of rain. The San Onofre Emergency Operations Facility (EOF) is located at the MESA and because of the flooding, is inaccessible to passenger vehicles. While the EOF itself is operable, in the event of an emergency at San Onofre, SCE (Southern California Edison) would direct EOF emergency responders to the alternate EOF located in Irvine, California. SCE is reporting this occurrence to the NRC in accordance with 10CFR50.72(b)(3)(xiii). At the time of this occurrence, Unit 2 was shutdown for a Steam Generator Replacement outage and Unit 3 was operating at about 100% power. SCE will notify the NRC Resident Inspectors about this occurrence and will provide them with a copy of this report.
On January 18, 2010 at about 2101 PST, the MESA road flooding had dissipated sufficiently for car traffic to be passable. In the event of an emergency at San Onofre, there is no longer a need to redirect emergency responders to the alternate EOF located in Irvine, California. This report is to advise the NRC of this change in EOF access status. Also note that it is expected that rain will continue in the SONGS area during the week of January 17, 2010 and this status is subject to change. At the time of this occurrence, Unit 2 was shutdown for a Steam Generator Replacement Outage and Unit 3 was operating at about 100% power. SCE will notify the NRC Resident Inspectors about this occurrence and will provide them with a copy of this report. Notified R4DO (Werner) and NSIR (Kahler).
On January 20, 2009, at about 2107 PST, the access road to the SONGS MESA facilities again became flooded after a day of rain (reference NRC Operations Log Number 45634). The San Onofre Emergency Operations Facility (EOF) is located at the MESA and because of the flooding, is inaccessible to passenger vehicles. While the EOF itself is operable, in the event of an Emergency at San Onofre, SCE would direct EOF emergency responders to the alternate EOF located in Irvine California. SCE is reporting this occurrence to the NRC in accordance with 10CFR50.72(b)(3)(xiii). At the time of this occurrence, Unit 2 was in a Steam Generator Replacement Outage and Unit 3 was operating at about 100% power. SCE will notify the NRC resident inspectors about this occurrence and will provide them with a copy of this report." Notified R4DO (Werner) and NSIR/EP. | Steam Generator | |
| ENS 45462 | 23 October 2009 19:05:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Emergency Preparedness Capabilities | On Friday October 23, 2009, at approximately 1205 PDT, Southern California Edison (SCE) evacuated Building E-50, which includes the SONGS (San Onofre Nuclear Generating Station) Emergency Operations Facility (EOF). This Building is located outside of both the Protected Area and the Owner Controlled Area. The evacuation was initiated due to personnel reports of a smoky odor in Building E-50. SONGS Fire Department responded to the incident and, at approximately 1222 PDT, the majority of Building E 50, including the EOF, was cleared for personnel to re-enter the building. SCE is continuing to investigate the source of the smoky odor. The EOF was considered unavailable (but fully functional) for approximately 17 minutes. The licensee notified the NRC Resident Inspector. | ||
| ENS 45205 | 13 July 2009 18:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Temporary Loss of Power to Ten Emergency Notification Sirens | On Monday July 13, 2009, at approximately 1100 PDT, Southern California Edison discovered a loss of the ability to activate 10 Community Alert Sirens (CAS) located on the Camp Pendleton Marine Corp Base. Prior to the discovery, the most recent test demonstrating operability of the sirens was performed on July 10, 2009, at approximately 1152 PDT. On July 13, 2009, at approximately 1130 PDT, SCE re-established the ability to activate the sirens. SCE is currently conducting an investigation to determine the cause of the problem, to try to ascertain the time that the loss of ability to activate the sirens occurred, and to identify the cause of the delay in reporting this event. SCE assumes the sirens were inoperable for greater than 48 hours, and therefore, is reporting this event as a loss of emergency offsite capability, in accordance with 10 CFR 50.72(b)(3)(xiii). At the time of this report, Unit 2 and Unit 3 were operating at about 99 percent and 100 percent power, respectively. A CAS power panel was found with a tripped breaker. An investigation into the cause of the breaker trip is ongoing. The licensee notified the NRC Resident Inspector.
During a follow up investigation, SCE identified information to indicate the loss of the ability to activate the 10 Community Alert Sirens located on the Camp Pendleton Marine Corp Base occurred at approximately 1800 PDT on July 10, 2009. Therefore, the sirens were inoperable for greater than 48 hours. Additionally, SCE verified that, prior to the discovery of the inoperable sirens, the most recent test demonstrating operability of the sirens was performed on July 10, 2009 at 1053 PDT (not 1152 PDT as initially reported). The NRC Resident Inspector has been notified and will be provided with a copy of this report. Notified R4DO Vincent Gaddy. | ||
| ENS 44355 | 18 July 2008 15:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Operations Facility Inoperable for Maintenance Work | Southern California Edison (SCE) has scheduled maintenance for the electrical system of the San Onofre Emergency Operations Facility (EOF), for Saturday, July 19, 2008. While the maintenance is being performed, the EOF will be inoperable. The EOF outage is expected to begin at 0800 PDT and last approximately 4 hours. The alternate EOF, located in Irvine, CA, will be available should SCE need to respond to an Emergency Event. The Emergency Recall System, which is housed in the EOF, will be out of service while the maintenance is performed. Should recall of the Emergency Response Organization (ERO) be necessary during the EOF outage, SCE will utilize alternate methods (contained in existing site procedures) for activating the ERO. This planned EOF outage is being reported in accordance with 10CFR50.72(b)(3)(xiii). At the time of this report, Unit 2 and Unit 3 were operating at about 98 per cent and 100 per cent, respectively. The NRC Resident Inspector has been notified of this report and will be provided a copy.
The Emergency Operations Facility was returned to service on July 19, 2008 at 1240 PDT. The NRC Resident Inspector will be notified of this occurrence and will be provided with a copy of this report. Notified R4DO (Johnson). | ||
| ENS 44251 | 30 May 2008 22:05:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Planned Power Outage at Primary Emergency Operations Facility (Eof) | Southern California Edison has scheduled replacement of the backup diesel generator (DG) for the San Onofre Emergency Operations Facility (EOF), for Saturday May 31, 2008. While the new DG is being installed, the EOF will be inoperable. The EOF outage is expected to begin at about 0700 and last approximately 8 hours. The alternate EOF located in Irvine, CA, will be available should SONGS need to respond to an Emergency Event. The Emergency Recall System, which is housed in the EOF, will be out of service while the new DG is being installed. Should recall of the Emergency Response Organization (ERO) be necessary during the EOF outage, SCE will utilize alternate methods (contained in existing site procedures) for activating the ERO. This planned EOF outage is being reported in accordance with 10 CFR 50.72(b)(3)(xiii). At the time of this report, Unit 2 and Unit 3 were operating at about 99 percent and 98 percent power, respectively. The licensee notified the NRC Resident Inspector.
The Emergency Operations Facility was returned to service on May 31, 2008 at 1810 PDT. SCE is continuing to troubleshoot problems identified with the transfer switch associated with the new backup diesel generator, and will inform the NRC Resident Inspectors when the backup DG is available. The licensee will notify the NRC Resident Inspector. | ||
| ENS 43837 | 11 December 2007 19:05:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Major Loss of Communications Capability | On Tuesday, December 11, 2007, at approximately 1105 PST, the San Onofre Nuclear Generating Station Control Room Red Phone and commercial telephone systems became inoperable for approximately 10 minutes. Control Room Red Phone operability was confirmed by a successful call to NRC Headquarters Operation Office about 1115 PST. Southern California Edison is reporting this event in accordance with 10CFR50.72(b)(3)(xiii) for a condition that resulted in a major loss of offsite communications capability (Emergency Notification System and offsite notification system). As part of the problem solving efforts, the Red Phone may become inoperable for brief periods of time. At the time of this report, Unit 2 is in Mode 6 in a refueling outage and Unit 3 is in Mode 1 at 100 percent power. The NRC Senior Resident Inspector has been notified of this event and provided a copy of this report. The licensee still had satellite phone communications capability. | ||
| ENS 41958 | 29 August 2005 17:45:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Safety Parameter Display System and Emergency Response Data System Planned Upgrade Outage | On August 29, 2005 at about 1045 PDT, San Onofre Nuclear Generating Station, Unit 3, removed a portion of the Safety Parameter Display System (SPDS) and the Emergency Response Data System (ERDS) from service for a planned upgrade to ensure long-term reliability and improve the human-machine interface. This work is expected to complete within seven days. The SPDS emergency assessment function at San Onofre is implemented by a combination of the Qualified Safety Parameter Display System (QSPDS) and the Critical Function Monitoring System (CFMS). The QSPDS portion, which provides emergency assessment capability to plant operators in the control room, will remain functional. The CFMS portion, which receives input from the QSPDS, implements the ERDS and communicates data to the Technical Support Center and Emergency Offsite Facility. Only the CFMS and ERDS are impacted by this upgrade. This planned CFMS outage is being reported in accordance with10CFR50.72(b)(3)(xiii) as a courtesy notification even though only a portion of the SPDS will be removed from service and preplanned compensatory measures will be in place for the duration of the work. "At the time of this report, Unit 2 and Unit 3 were operating at about 99 percent and 100 percent power, respectively. The NRC Resident Inspectors will be notified of this occurrence and will be provided with a copy of this report. * * * UPDATE ON 09/04/05 AT 0249 FROM C. WILLIAMS TO P. SNYDER * * * The CFMS upgrade work was completed on September 3, 2005 at 2255 PDT. The SPDS and ERDS have been returned to service. The NRC Resident Inspectors will be notified of this occurrence. Notified R4DO (Smith). | Emergency Response Data System Safety Parameter Display System Qualified Safety Parameter Display System Critical Function Monitoring System | |
| ENS 41477 | 9 March 2005 08:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Planned Loss of the Emergency Response Data System | The following information was obtained from the licensee via e-mail (licensee text in quotes): On Thursday, March 10, 2005 San Onofre Nuclear Generating Station, Unit 2, will remove a portion of the Safety Parameter Display System (SPDS) and the Emergency Response Data System (ERDS) from service for a planned upgrade to ensure long-term reliability and improve the human-machine interface. This work is expected to complete within seven days. The SPDS emergency assessment function at San Onofre is implemented by a combination of the Qualified Safety Parameter Display System (QSPDS) and the Critical Function Monitoring System (CFMS). The QSPDS portion, which provides emergency assessment capability to plant operators in the control room, will remain functional. The CFMS portion, which receives input from the QSPDS, implements the ERDS and communicates data to the Technical Support Center and Emergency Offsite Facility. Only the CFMS and ERDS are impacted by this upgrade. This planned CFMS outage is being reported in accordance with 10CFR50.72(b)(3)(xiii) as a courtesy notification even though only a portion of the SPDS will be removed from service and preplanned compensatory measures will be in place for the duration of the work. At the time of this report, Unit 2 and Unit 3 were operating at about 79 percent and 99 percent power, respectively. The NRC Resident Inspectors will be notified of this occurrence and will be provided with a copy of this report. Should an emergency event occur, the licensee intends to transmit emergency response data to the NRC via facsimile and voice via the emergency notification system. No electronic data will be sent to the NRC Operations Center for the outage duration.
The CFMS upgrade work was completed on March 17, 2005 at 2310 PST. The SPDS and ERDS have been returned to service. The licensee has notified the NRC Resident Inspector. Notified R4DO (Farnholtz). | Emergency Response Data System Safety Parameter Display System Qualified Safety Parameter Display System Critical Function Monitoring System | |
| ENS 41320 | 10 January 2005 03:45:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | San Onofre Emergency Operations (Eof) Inaccessible Due to Road Flooding | The following information was received from the licensee via e-mail: On January 9, 2005, at about 1945 PST, the access road to the SONGS MESA facilities became flooded after several days of rain. The San Onofre Emergency Operations Facility (EOF) is located at the MESA and because of the flooding, is inaccessible to passenger vehicles. While the EOF itself is operable, in the event of an Emergency at San Onofre, SCE would direct EOF emergency responders to the alternate EOF located in Irvine, California. SCE is reporting this occurrence to the NRC in accordance with 10CFR50.72(b)(3)(xiii). At the time of this occurrence, Unit 2 was operating at about 100% power and Unit 3 was operating at about 65% power. SCE will notify the NRC resident inspectors about this occurrence and will provide them with a copy of this report.
On January 10, 2005 at about 0143 PST, flooding had dissipated sufficiently for one lane to be passable; at 0615 PST, both lanes were passable. In the event of an Emergency at San Onofre, there is no longer a need to redirect emergency responders to the alternate EOF located in Irvine, California. This report is to advise the NRC of this change in EOF access status. Also note that it is continuing to rain at SONGS and this status is subject to change. At the time of this report, Unit 2 was operating at about 85% power and Unit 3 was at about 80% power. SCE has informed the NRC resident inspectors and will provide them with a copy of this report. Notified R4DO (Bywater).
On January 11, 2005, at about 0041 PST, the access road to the SONGS MESA facilities again became flooded after several days of rain (reference NRC Operations Log Number 41320). The San Onofre Emergency Operations Facility (EOF) is located at the MESA and because of the flooding, is inaccessible to passenger vehicles. While the EOF itself is operable, in the event of an Emergency at San Onofre, SCE would direct EOF emergency responders to the alternate EOF located in Irvine California. SCE is reporting this occurrence to the NRC in accordance with 10CFR50.72(b)(3)(xiii). At the time of this occurrence, Unit 2 was operating at about 85% power and Unit 3 was at about 80% power. SCE will notify the NRC resident inspectors about this occurrence and will provide them with a copy of this report. Notified R4DO (Bywater).
On January 11, 2005, at 0125 PST, Southern California Edison (SCE) reported that the access road to the SONGS MESA facilities had again flooded after several days of rain and that the SONGS Emergency Operations Facility (EOF) was inaccessible to passenger vehicles (NRC Operations Log Number 41320). On January 11, 2005 at about 0535 PST, flooding had dissipated sufficiently for the road to be passable. In the event of an Emergency at San Onofre, there is no longer a need to redirect emergency responders to the alternate EOF located in Irvine California. This report is to advise the NRC of this change in EOF access status. At the time of this report, Unit 2 was operating at about 85% power and Unit 3 was at about 81% power. SCE has informed the NRC resident inspectors and will provide them with a copy of this report. Notified R4DO (Russ Bywater). |