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 Start dateReporting criterionTitleEvent descriptionSystemLER
ENS 5637621 February 2023 22:02:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification to Local Agency

The following information was provided by the licensee via email: On 2/21/2023 at 1402 (PST) SONGS (San Onofre Nuclear Generating Station) notified San Diego Regional Water Quality Control Board (SDRWQCB) regarding the results of a quarterly monitoring report. The report indicated the 24-effluent toxicity sample resulted in a 'Fail.' The results prompted a 24 hour notification to the SDRWQCB in accordance with the NPDES (National Pollutant Discharge Elimination System) permit. There was no significant effect on the health and safety of the public or the environment. Action Taken: SCE (Southern California Edison) Environmental notified the SDRWQCB via telephone voice mail at 1402 on 2/21/2023 followed by an e-mail describing the reason for the notification.

  • * * UPDATE ON 02/22/2023 AT 1403 EST FROM GUADALUPE ROBLES Jr. TO IAN HOWARD * * *

The following is a summary of information provided by the licensee via email: The licensee corrected the Unit from ISFSI to Unit 2 and the name of the quarterly test to note it was for the first quarter of 2023. Notified R4DO (Roldan-Otero), and NMSS Events Notification via email.

ENS 5461226 March 2020 03:00:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification for Sewage ReleaseOn 3/25/2020, SONGS (San Onofre Nuclear Generating Station) made required formal notifications to the California Office of Emergency Services at 2107 PDT, the San Diego Regional Water Quality Review Board at 2123 PDT, the San Diego Department of Environmental Health (CUPA) (Certified Unified Program Agency) at 2104 PDT, the National Response Center (NRC) at 2115 PDT, and the San Diego Coast Guard at 2149 PDT, concerning an approximate 7,000 gallon release of partially treated sewage to the Pacific Ocean. Both Sewage Treatment Plant effluent pumps were shut down and a state certified vendor is working to bring the treatment plant back to service.
ENS 5417923 July 2019 21:05:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite NotificationOn 7/23/2019 at 1405 PDT, San Onofre Nuclear Generating Station (SONGS) made a required formal notification to the Regional Water Quality Control Board for the state of California concerning a monthly oil sample of the oil removal system. The sample was analyzed to contain 42 ppm oil. This number exceeds the daily instantaneous maximum of 20 ppm. An additional sample was taken approximately one minute later and was analyzed to contain 8.1 ppm oil, potentially indicating a problem with the initial sample. Additional investigation is underway and a written follow-up report will be submitted to the Regional Water Quality Control Board within 5 days in accordance with the National Pollutant Discharge Elimination System permit. The licensee will inform NRC Region IV staff.
ENS 535805 September 2018 07:00:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseNotification to a Government Agency for Assistance Relative to a Medical EmergencyAt approximately 0608 Pacific Daylight Time (PDT), the Control Room was notified of a SONGS SCE (San Onofre Nuclear Generating Station Southern California Edison) employee experiencing a non-work related medical emergency outside the protected area, inside the owner controlled area. SONGS fire brigade was dispatched. Camp Pendleton Fire ambulance was requested. At 0644 (PDT) Camp Pendleton Fire department in communication with a doctor determined the victim is deceased. This notification is being made in accordance with 10 CFR 50.72(b)(2)(xi) for a situation related to the health of on-site personnel for which a notification to other government agencies is planned. California Highway Patrol and Coroner notified and expect the California Occupational Safety and Health Administration (Cal-OSHA) will be notified. NRC Region IV was notified (approximately 0900 PDT) as SONGS does not have a NRC resident inspector.
ENS 5225219 September 2016 19:30:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification to San Diego Regional Water Quality Control BoardAt 1230 (PDT) on 9/19/16, SONGS (San Onofre Nuclear Generating Station) made an offsite notification to the San Diego Regional Water Quality Control Board in regards to an oily waste water release to the environment in excess of allowable limits. On 9/15/16, the Unit 3 oily waste sump overflowed. An estimated 1500 gallons was released to the intake which is pumped to the outfall. A sample was taken during the end of the overflow; no visual indication of oil and grease was noted. The sample analysis completed on 9/19/16 indicated a result that exceeded SONGS' NPDES (National Pollutant Discharge Elimination System) instantaneous maximum limit of 20 ppm; results were 34.4 ppm. The licensee will inform NRC Region IV staff.
ENS 5101827 April 2015 22:27:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification to Local AgencyNotification was made to the San Diego Regional Water Quality Control Board, and a message was left for exceeding the daily maximum parts per million (ppm) of oil and grease in the North Industrial Area Yard Drain Sump. Sump pumps are currently in "OFF" and the site is investigating. The oil in the drain sump did not reach "reportable quantities" and did not require notifying other Federal Agencies.
ENS 5047018 September 2014 19:35:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification - Failure to Submit Required Semi-Annual and Annual Samples and Reports Per NpdesToday, at 1235 (PDT), San Onofre made the decision to notify offsite agencies (San Diego Regional Water Quality Control Board and Environmental Protection Agency if directed by SDRWQCB). Initial contact made with the San Diego Regional Water Quality Control Board was at 1333 (PDT) on 9/18/14. The subject of the report is listed below: On September 15, 2014, during a review of the NPDES (National Pollutant Discharge Elimination System) self-monitoring reports, SCE SONGS (Southern California Edison San Onofre Nuclear Generating Station) environmental staff discovered annual and semi-annual samples and required reports due in 2014 were not submitted on time and are now past due: - The missed samples and associated reports are non-radiological in nature - All parameters (physical and analytical data) in past Semi-annual and Annual reports have been in compliance with the NPDES permit. The licensee informed the NRC Resident Inspector.
ENS 5011514 May 2014 21:54:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleasePress Release Concerning Wildfire Near the FacilitySONGS (is) making a 4-Hour notification per 10CFR72.75 (b) to the NRC Operations Center regarding the following: There has been a fire in the vicinity of the station. The fire is not on plant property and has not challenged station operations. Entry into SONGS' Emergency Plan and activation of the Emergency Response Organization is not required at this time. Because of the fire near the plant, Southern California Edison will be making a press release today to update the public as to the situation at the plant. The licensee notified an onsite NRC Inspector.
ENS 4891311 April 2013 06:26:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseFbi Notified Due to Degraded Security Radio CommunicationsAt 2253 PDT on 4/10/13, SONGS experienced degraded on-site radio communications during planned maintenance on radio systems. Radio communications were restored at 2315 PDT. The licensee will notify the NRC Resident Inspector.
ENS 4842821 October 2012 15:05:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification Due to Hydrogen LeakageThe control room was notified that an unknown quantity of H2 gas (classified as a minor coupling leak (identified with Snoop liquid leak detector)) is currently being released to the air from the Unit 2 Full Flow Hydrogen skid. The Environmental Protection Group reported the leak to the California Emergency Management Agency (Cal EMA) at 0809 PDT and the San Diego Department of Environmental Health at 0812 PDT lAW (plant) procedure S0123-XV-17.3, 'Spill Contingency Plan'. The Hydrogen Gas leak is currently still in progress. There is no gas collection areas. Maintenance is in the process of taking action to terminate the leak. The licensee notified the NRC Resident Inspector.
ENS 4834426 September 2012 00:07:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification Due to a Freon Leak from Building Air ConditionerThe control room was notified by the Environmental Protection Group that 43 lbs of Freon was released (from an air conditioning unit) at the Administration Warehouse Supply/Shop, not in the Protected Area, and that it was reported to the California Emergency Management Agency at 17:19 PDT and San Diego County at 17:12 PDT, per lAW procedure SO123-XV-17.3, 'Spill Contingency Plan'. There is no longer a Freon release in progress. The licensee has notified the NRC Resident Inspector.
ENS 4748128 November 2011 14:00:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification of Unplanned Acidic Solution DischargeDuring the regeneration of the Unit 2 full flow condensate polishing demineralizer (FFCPD) resin, 5 percent sulfuric acid briefly overflowed from the bermed area. The majority of the acid went into the floor drains in the FFCPD area and then to the turbine building sump system. An estimated quantity of 2 gallons of sulfuric acid was released into the storm drains that discharged into the circulating water system. The quantity released was well below the reportable quantity. The fire department and environmental/hazmat team were contacted and responded. Precautionary notifications were made by SCE to: - California Emergency Management Agency - San Diego Dept. of Environmental Health. The cause of the leak has been corrected and no additional discharge is anticipated. The licensee will notify the NRC Resident Inspector.Circulating Water System
ENS 474011 November 2011 21:50:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
10 CFR 50.72(a)(1)(i), Emergency Class Declaration
Alert Declared Due to an Ammonia Leak

On November 1, 2011 at 1450 PDT, San Onofre Unit 3 declared an ALERT and entered EAL HA3.1 due to an ammonia leak that prevented access to local areas. The plant is in a stable condition while the leakage is being secured. The turbine building on Unit 3 has been evacuated. Plant personnel are in the process of verifying no presence of ammonia in the turbine building. There was no impact on Unit 2.

  • * * UPDATE FROM KEN HOUSEMAN TO JOHN KNOKE AT 2115 EDT ON 11/01/11 * * *

At 1807 PDT licensee exited the ALERT and EAL HA3.1. The leak was at the Ammonia day tank and was flowing through an overflow vent into the berm. The high level in the Ammonia day tank was due to a leaking closed valve between the Demineralizer system and the ammonia bulk storage. The berm area was drained of all fluids. The wind direction caused the ammonia fumes to travel to the Unit 3 turbine deck. No off-site HAZMAT personnel came on-site. At 1756 PDT the precautionary evacuation of on-site personnel was terminated. Unit 2 was not affected from this event. The NRC Resident Inspector was notified. Notified NRR EO (Fredrick Brown), R4DO (Vincent Gaddy, IRDMOC (Jeff Grant), DHS (Hill), DOE (Doyle), USDA (Krauf), FEMA (Fuller) and HHS (Fajardo).

  • * * UPDATE FROM LEE KELLY TO VINCE KLCO AT 2228 EDT ON 11/01/11 * * *

On November 1, 2011, Southern California Edison notified the California Emergency Management Agency at 1755 PDT and the San Diego Department of Environmental Health at 1810 PDT that approximately 25 gallons of Ammonium Hydroxide was spilled under the Ammonium Hydroxide day tank located outside the Unit 3 turbine building. The spill was contained in a berm under the tank and subsequently cleaned up. Both Units 2 and 3 were at approximately 100% power at the time of the event. Notified the R4DO (Gaddy).

ENS 4728923 September 2011 00:30:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification to County Agency Due to Inadvertent Wastewater Discharge

This notification is for San Onofre Units 2 and 3, and is being made in accordance with 10CFR50.72(b)(2)(xi) to report a notification to another government agency regarding a spill of approximately 26000 gallons of untreated waste water (sewage). A pending report will be made to the San Diego County Dept. of Environmental Health regarding a untreated (sewage) waste water spill that occurred as San Onofre. The details that were communicated to the DEH are that at 1730 PDT a sewage spill was identified at SONGS in the North Industrial yard area. The leak was being collected in the yard drains and being discharged to the ocean. The sump discharge system has been secured stopping the release. The licensee will inform the NRC Resident Inspector.

  • * * UPDATE FROM LEE KELLY TO JOHN KNOKE AT 1325 EDT ON 9/26/11 * * *

On September 22, 2011, an untreated (sewage) waste water spill was discovered in the San Onofre North Industrial Area. Southern California Edison (SCE) notified the NRC at 1730 PDT on September 22, 2011, (Event No. 47289) in accordance with 10CFR50.72(b)(2)(xi). The California Emergency Management Agency was notified (Control #11-5652) at 2223 PDT and San Diego County Department of Environmental Health (DEH) was notified at 2239 PDT. The initial report to the NRC indicated the spill was approximately 26,000 gallons. The estimated size of the spill has subsequently been revised to approximately 7,000 gallons. At the time of the event, Units 2 and 3 were at 100 percent power. SCE notified the NRC Resident Inspectors about this occurrence and will provide them with a copy of this report. Notified the R4DO (Greg Werner).

ENS 4690429 May 2011 16:57:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification Due to an On-Site Sulfuric Acid SpillThis notification is for San Onofre Units 2 and 3 and is being made in accordance with 10CFR50.72(b)(2)(xi) to report that on 5/29/2011 at 0957 PDT Government agencies were notified of a sulfuric acid spill. On 5/28/2011 (at) 1440 PDT, during resin bed regeneration operations at the High Flow Makeup Demineralizer (HFMUD), a sulfuric acid transfer was in progress. When process piping was pressurized, a valve on the discharge side of the process pump experienced a diaphragm failure causing a body to bonnet leak. Operators secured the acid transfer. All the sulfuric acid was contained within the bermed area of the HFMUD. Hazardous material teams have contained and cleaned up the spill. Area is secured until repairs can be implemented. All HFMUD operations have been stopped until repairs are completed. On 5/29/2011 at 0926, the hazardous material team determined that this event was reportable to government agencies. The following reports were made: (At) 0957 PDT San Diego Department of Enviornmental Health (was) called with (a) voice message left. (At) 0959 PDT California Emergency Management Agency (was) called. Report number 11-3246. (At) 1008 PDT National Response Center (was) called. Report number 977718. The licensee has notified the NRC Resident Inspector,
ENS 4675514 April 2011 19:35:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification to State of California Due to Hydrogen LeakDuring a scheduled delivery of Hydrogen to Unit 2's active and reserve hydrogen banks, a hydrogen leak was detected at the hydrogen fill connection isolation valve. A notification was made for an uncontrolled release of hazardous material to San Diego Department of Environmental Health at 12:35 PST and California Emergency Management Agency at 12:40 PST. Upon detection, the leak was isolated. The licensee has notified the NRC Resident Inspector.
ENS 4662117 February 2011 23:11:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification Due to Hydrazine Spill Contained OnsiteOn February 17, 2011, at approximately 1200 PST, noted approximately 70 gallons of diluted 35% hydrazine had spilled fully contained in a bermed area from a chemical holding tank inside the Protected Area and subsequently removed to barrels. Off-site notifications were made as follows: National Response Center at 1536 (PST) (NRC REPORT #967808) Cal-EMA at 1530 (PST) San Diego Department of Health at 1526 (PST) The licensee has notified the NRC Resident Inspector.
ENS 4661615 February 2011 19:40:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOff-Site Notification of Sewage Spill Contained On-Site (<100 Gallons)On February 15, 2011, at about 0830 PST, approximately 65 gallons (calculated maximum of 98 gallons) of partially treated sewage spilled on the ground and into a concrete ditch at San Onofre Nuclear Generating Station (SONGS) at the Mesa area while cleaning up from the plant overflow on 2-11-11. The spill was contained, vacuumed up, and returned to the sewage treatment plant. At approximately 1140 PST, Southern California Edison notified the San Diego Regional Water Quality Control Board, and the San Diego County Department of Environmental Health was notified at 1220 PST. Unit 2 is operating at approximately 100% power and Unit 3 is in Mode 3 after a steam generator replacement and refueling outage. The licensee will notify the Resident Inspector.Steam Generator
ENS 4661212 February 2011 00:15:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification of a Sewage Spill Contained OnsiteThe site Environmental Protection (EP) group notified the control room of a 3000 gallon sewage spill from the Mesa Sewage Treatment Plant. The spill overflowed to the storm water catch basin. The EP group notified the San Diego Regional Water Quality Board and the San Diego Department of Environmental Health. All sewage has been contained within the storm water catch basin. EP is currently on station to remediate the sewage spill. No sewage has been discharged offsite. The licensee has notified the NRC Resident Inspector.
ENS 4655018 January 2011 17:45:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseSiren Growl Heard Offsite

On January 18, 2011, at about 0830 PST, a State Park Ranger notified SONGS (San Onofre Nuclear Generating Station) Security that a siren growl was heard in the San Clemente State Park. Security subsequently notified the Control Room. Site Emergency Planning initiated an investigation of the event and informed the City of San Clemente Emergency Planning at approximately 0945 PST of the park ranger's call. SONGS investigation by its siren technicians into the potential SONGS siren growl resulted in absolutely no indication of activation of any of SONGS emergency sirens. It should be noted that quarterly growl tests have been scheduled during working hours January 18-20, 2011, and this information is posted on the City of San Clemente web site. However the tests had not been initiated at the time of the ranger report. In compliance with 10CFR50.72(b)(2)(xi), requiring licensees to report any event that results in notification to other government agencies, SCE (Southern California Edison) is providing this notification to the NRC. At the time of the State Park Ranger notification, Unit 2 was at approximately 100 percent power and Unit 3 was shutdown for a Steam Generator Replacement Outage. SCE will notify the NRC Resident Inspectors about this occurrence and will provide them with a copy of this report.

  • * * UPDATE FROM DENNIS MORRIS TO JOE O'HARA AT 1954 ON 1/18/11 * * *

SONGS telecommunications confirmed that the siren which was reported earlier was associated with Camp Pendleton and not associated with SONGS. Notified R4DO(O'Keefe)

Steam Generator
ENS 4649921 December 2010 04:20:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseAccess to Primary Emergency Operations Facility Not Possible Due to FloodingNotified by the Security Shift Commander at 2020 (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.
ENS 463954 November 2010 22:04:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleasePortal Radiation Monitor Alarm on a Scrap Shipment

On November 4, 2010, at approximately 1504 PDT, San Onofre Nuclear Generating Station (SONGS) was notified that scrap circuit breakers salvaged from the SONGS warehouse had alarmed a portal radiation monitor at a metal recycling facility in Los Angeles County. The monitor indicated a reading approximately 40% above background levels. Naturally occurring isotopes in the circuit breakers are suspected to have alarmed the portal monitor. The metal recycling vendor (Alpert and Alpert) called the Los Angeles branch of the California Department of Health Services, Radiologic Health Branch to obtain a special permit authorizing the return shipment to SCE. SCE is reporting this event in accordance with 10CFR50.72(b)(2)(xi). At the time of this report, Unit 2 was operating at 100% power and Unit 3 is defueled. The licensee notified the NRC Resident Inspector.

  • * * UPDATE AT 0018 EDT ON 11/06/10 FROM SIMMON TO HUFFMAN * *

On November 5, 2010, employees of the San Onofre staff disassembled the scrap circuit breakers that had been sent from the San Onofre Warehouse to the Alpert and Alpert salvage yard on November 4. These high voltage circuit breakers contain arc chutes consisting of large ceramic plates that contain naturally occurring radioactive material. All ceramic materials were removed. Health Physics technicians then re-surveyed the circuit breaker casings by direct and indirect survey and verified that they did not contain any detectable levels of radioactive material. Indirect survey of the ceramic material demonstrated that they had no detectable levels of removable radioactive material. The California Department of Health Services, Radiologic Health Branch will be notified of these results. The licensee has notified the NRC Resident Inspector. R4DO (Howell) and FSME (Chang) notified.

ENS 4613328 July 2010 16:45:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification of a Sulfuric Acid SpillOn Wednesday, July 28, 2010, at about 0945 PDT, Southern California Edison (SCE) determined that a spill of a total of about 110 gallons of sulfuric acid had occurred from two different locations earlier in the same day. All the acid was contained within the chemical berms around the acid transfer pumps in the Unit 3 intake area at the 9 foot level and the 30 foot level caustic berm. No acid was released to the environment. At 1050 PDT, SCE initiated notification to the San Diego County Department of Environmental Health (Report # 10-063463), the California Emergency Management Agency (CalEMA) (Report # 10-4518) and the National Response Center (Report # 949176). Notifications were completed by 1100 PDT. SCE is making this notification in accordance with 10CFR50.72(b)(2)(xi). The NRC Senior Resident Inspector has been notified.
ENS 4604725 June 2010 21:27:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseHazmat Spill Requiring Offsite NotificationsOn Friday, June 25, 2010, at about 1235 PDT, Southern California Edison (SCE) spilled about 25 gallons of Ethanolamine (ETA) while filling the ETA bins from the ETA bulk container. The spill occurred at the SONGS MESA Hazmat pad. Approximately 23 gallons remained inside the hazmat berm; approximately 2 gallons were spilled and contained outside the berm. The SONGS Hazardous Materials personnel are in the process of removing the ETA for disposal. ETA is used to control secondary side chemistry. SCE completed notification of the San Diego County Department of Environmental Health, the California Emergency Management Agency (CalEMA) and the National Response Center (Incident # 945486) by 1427 PDT. SCE is making this notification in accordance with 10CFR50.72(b)(2)(xi). At the time of this report, SONGS Units 2 and 3 are at 100% power. The NRC Senior Resident Inspector has been notified of this occurrence and will be provided with a copy of this report.
ENS 4594321 May 2010 20:20:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification to California Department of Public HealthOn May 19, 2010, at approximately 1730 PDT, San Onofre Nuclear Generating Station (SONGS) was notified that scrap bushings from breakers in the Unit 2 switchyard had alarmed a radiation monitor at a metal recycling facility in Los Angeles County. The metal recycling vendor (Alpert and Alpert) shipped the bushings back to a Southern California Edison (SCE) facility in Orange County. On May 21, 2010, SONGS completed isotopic analysis of a sample of ceramic shards from six randomly selected bushings. The analysis confirms the presence of naturally occurring radionuclides (uranium and thorium series), but does not indicate the presence of licensed radioactive material. On May 21, 2010, at approximately 1320 PDT, SONGS confirmed that on May 19, 2010, the metal recycling vendor had called the Brea branch of the California Department of Public Health, Radiologic Health Branch (Andrew Taylor) to obtain a special permit authorizing the return shipment to SCE. SONGS is, therefore, reporting this event in accordance with 10CFR50.72(b)(2)(xi) as an event related to the health and safety of the public for which notification to another government agency has been made. At the time of this report, both Unit 2 and Unit 3 were operating at 100 percent power. The NRC Senior Resident Inspector has been notified of this occurrence and will be provided with a copy of this report.
ENS 4586020 April 2010 18:03:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification - Sodium Hydroxide Released Into BermAt about 0755 (PDT) on April 20, 2010, approximately 200 gallons of sodium hydroxide (caustic) was released into the SONGS Caustic Skid Berm. The release was fully contained within the bermed area and there was no release to the environment. The release is believed to have occurred from a Unit 2 caustic pump pressure safety valve (PSV) during the performance of condensate polishing demineralizer regeneration. The release has been secured and SONGS personnel have pumped the caustic to poly drums. Between 1103 and 1125 (PDT) SONGS notified the San Diego Department of Environmental Health (DEH), the State of California Emergency Management Agency (CalEMA), and the National Response Center of the contained non-radioactive caustic spill within the protected area of the facility. Therefore, Southern California Edison is reporting this occurrence to the Nuclear Regulatory Commission in accordance with 10 CFR 50.72(b)(2)(xi). SONGS Unit 2 is in Mode 1 at approximately 98% power and Unit 3 is in Mode 1 at approximately 50% power. The NRC Resident Inspector will be notified of this occurrence and will be provided a copy of this report. Additional information regarding this event will be provided to one of the Resident Inspectors at the site.
ENS 456848 February 2010 08:10:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseEmergency Siren Spurious ActuationEmergency offsite siren, SC-11, in the City of San Clemente inadvertently activated for (approximately) 20 seconds. (Similar to 1/19/10 event) (EN #45636) Notification of California Office of Emergency Services and FEMA may occur. The licensee is investigating the cause of the alarm. The licensee has informed the NRC Resident Inspector.
ENS 4563619 January 2010 12:30:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseEmergency Siren Spurious Actuation

On January 19, 2010, at about 0445 PST, the SONGS Control Room was notified of a spurious actuation of a SONGS emergency response siren located in the city of San Clemente. The actuation occurred on January 19, 2010 at about 0430 PST for a duration of approximately 30 minutes. Upon investigation the siren was put into a silent test mode and technicians were able to duplicate the sounding. The siren was subsequently put into an inoperable status pending investigation and the cause of the actuation is unknown at this time. SCE (Southern California Edison) personnel notified Orange County, the City of San Clemente and the City of Dana Point regarding the inadvertent actuation of part of the public notification system.

In compliance with 10CFR50.72(b)(2)(xi), requiring licensees to report any event that results in notification to other government agencies, SCE is providing this notification to the NRC. At the time of this occurrence, Unit 2 was shutdown for a Steam Generator Replacement Outage and Unit 3 was operating at about 100 percent power. SCE will notify the NRC Resident Inspectors about this occurrence and will provide them with a copy of this report.

Steam Generator
ENS 453284 September 2009 00:30:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification to Los Angeles County Public Health Radiation Management Division

On September 3, 2009, at approximately 1730 PDT, Southern California Edison (SCE) was notified by a metal recycling vendor that a metal recycle load that was picked up at SONGS had been rejected at Terminal Island (Long Beach, CA) because it set off a radiation portal monitor as it was being processed through. The vendor (Alpert and Alpert) was requested to immediately ship the material back to SONGS. The County of Los Angeles Public Health, Radiation Management Division (Joji Ortego) called to confirm final destination, and a Special DOT Permit was issued to return the shipment to SONGS. The truck is currently returning to San Onofre where SCE Health Physicists will evaluate the load. SCE is reporting this event in accordance with 10CFR50.72(b)(2)(xi). SCE will provide an update to this report after the truck has returned to SONGS and the contents evaluated. At the time of this report, Unit 2 and Unit 3 were operating at about 99 and 100 percent power respectively. The NRC Resident Inspectors have been notified of this occurrence and will be provided with a copy of this report.

  • * * UPDATE FROM DAVID AXLINE TO CHARLES TEAL AT 1456 ON 09/04/09 * * *

The truck returned to SONGS site and SONGS has performed surveys on the contents of the truck cargo containers. SONGS' preliminary investigation did not identify any licensed radioactive material either internal or external to the containers. Surveys indicate that the source of the radiation appears to be boxes of ceramic tiles being removed from a storage area outside the Owner Controlled Area (OCA). Gamma isotopic analysis indicate the tiles appear to contain naturally occurring radioactive material (thorium byproducts). SONGS will continue to perform additional surveys to validate our initial conclusions. The NRC Resident Inspectors have been notified of this occurrence and will be provided with a copy of this report. Notified R4DO (Farnholtz).

ENS 4527419 August 2009 18:50:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification for Inadvertant Actuation of Sirens for 10 SecondsDuring an exercise, sirens for the city of San Clemente (19 of 52 total sirens) were inadvertently actuated for approximately ten seconds. The licensee made off-site notifications to California FEMA, California Dept of Health, California State Parks, Camp Pendleton, and the cities of San Clemente, San Juan Capistrano, and Dana Point. The licensee has notified the NRC Resident Inspector.
ENS 4498512 April 2009 11:30:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification Due to Sulfuric Acid Spill Into BurmOn Sunday, April 12, 2009 at about 0430 PDT, Southern California Edison (SCE) discovered that approximately 300 gallons of sulfuric acid had overflowed from the Unit 3 Sulfuric Acid Day Tank. The acid was contained within a berm around the tank, and there was no release to the environment. SONGS (San Onofre Nuclear Generating Station) Hazardous Materials personnel are in the process of responding to this event. Once onsite they will remove the acid from the berm for disposal at a hazardous waste facility. The overflow was caused by leakage from the Bulk Acid Tank to the Acid Day Tank. At about 1004 PDT, SCE notified the San Diego County Department of Environmental Health, and at about 0940 PDT, SCE notified the California Office of Emergency Services. SCE is making this notification in accordance with 10CFR50.72(b)(2)(xi). At the time of the report, SONGS Unit 2 is in Mode 1 at approximately 99% power and Unit 3 is in Mode 1 at approximately 100% power. The NRC Senior Resident Inspector has been notified of this occurrence and will be provided with a copy of this report.
ENS 4498310 April 2009 16:00:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification Due to Sulfuric Acid OverflowOn Friday April 10, 2009, at about 0900 PDT, Southern California Edison (SCE) discovered that approximately 1,000 gallons of sulfuric acid had overflowed from the Unit 3 Sulfuric Acid Day Tank. The acid was contained within a berm around the tank, and there was no release to the environment. SONGS (San Onofre Nuclear Generating Station) Hazardous Materials personnel responded to the event, and are in the process of removing the acid from the berm for disposal at a hazardous waste facility. The overflow was caused by leakage from the Bulk Acid Tank to the Acid Day Tank. At about 1340 PDT, SCE notified the San Diego County Department of Environmental Health, and at about 1353 PDT, SCE notified the California Office of Emergency Services. SCE is making this notification in accordance with 10CFR50.72(b)(2)(xi). At the time of this report, SONGS Unit 2 is in Mode 1 at approximately 99% power and Unit 3 is in Mode 1 at approximately 100% power. The NRC Senior Resident Inspector has been notified of this occurrence and will be provided with a copy of this report.
ENS 4437429 July 2008 21:00:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleasePress Release Concerning Impact of Earthquake on Southern California Edison AssetsOn July 29, 2008, SCE issued a press release regarding the earthquake that occurred on the same day. Along with information on other facilities, the press release included information on San Onofre Nuclear Power Plant and stated: The earthquake was felt at the San Onofre Nuclear Generating Station site. There were no safety issues reported and no indications of any damage. The plant continues to operate normally. The NRC Resident Inspector has been notified.
ENS 4393325 January 2008 17:00:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification Due to Inadvertent Actuation of Emergency Siren

On January 25, 2008, at about 0902 PST, SCE notified the City of Dana Point Emergency and Support Services of a spurious actuation of a SONGS (San Onofre Nuclear Generating Station) emergency response siren located in the City of Dana Point. The actuation occurred on January 25, 2008 at about 0900 PST with a duration of approximately ten seconds. The cause of the actuation appears to be due to SCE (Southern California Edison) maintenance being performed at the time. SCE personnel notified Orange County and the State of California Office of Emergency Services regarding the inadvertent actuation of part of the public notification system.

In compliance with 10CFR50.72(b)(2)(xi), requiring licensees to report any event that results in notification to other government agencies, SCE is providing this notification to the NRC.

"At the time of this occurrence, Unit 2 was operating at about 96 percent power and Unit 3 was operating at about 100 percent power.  SCE has notified the NRC resident inspectors about this occurrence and will provide them with a copy of this report.
ENS 4264414 June 2006 05:05:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification - Auto Accident Fatality

On Tuesday, June 13, 2006, at approximately 2205 PDT, an on duty SONGS security officer driving an SCE vehicle struck a pedestrian on a public road outside the Owner Controlled Area. At that time, the officer was performing routine rounds and was driving between the plant and SCE's MESA facility. SCE notified local authorities including the California Highway Patrol and the Orange County Fire Authority.

The individual sustained serious injuries and was transported to a local hospital. SCE has been notified unofficially that the individual passed away on June 14, 2006. The identity of the individual is unknown by SCE. SCE is reporting this occurrence in accordance with 10CFR50.72(b)(2)(xi). No news release is planned by SCE at this time. At the time of this report, Units 2 and 3 were operating at about 99 and 100 percent power, respectively. The NRC Resident Inspectors have been notified of this occurrence and will be provided with a copy of this report.

ENS 4237023 February 2006 12:00:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseMinor Leakage of Wastewater from Transport Truck

On February 22, 2006, at 1000 PST, two tankers containing wastewater with trace levels of radioactivity departed San Onofre Nuclear Generating Station (SONGS) Unit 1 Industrial Site for Clive, Utah. Each truck contained about 4500 gallons of water. At about 0400 PST February 23, 2006, SCE was notified by the trucking company (Triad Transport Company) that minor leakage from a valve on top of one of the trucks had been observed. The leakage was observed while the truck was stopped in Parawan, Utah approximately 4 hours from its destination. The driver of the truck immediately notified his management who traveled to the site, identified the origin of the leak as spray from a valve on top of the truck, relieved the tank pressure from a vent valve, and stopped the leak. Dampness was observed on the ground beside the tanker. Unconfirmed measurements indicate radiation levels are near background. SCE has dispatched a team to the site to coordinate remediation efforts as necessary. The second tanker has arrived at the site in Clive, Utah and no leakage was observed during receipt inspection. The Director of the Utah's Division of Radiation Control and the NRC Resident Inspectors have been notified of this occurrence. At the time of this report, Unit 1 was undergoing decommissioning. The activity from the radionuclides in the entire truck totaled 70.9 mCi, and primarily consisted of Cs-137 (41 mCi), Ni-63 (15 mCi), and Co-60 (5 mCi). The transport company notified the National Response Center. The truck traveled thru 4 States: CA, NV, AZ UT.

  • * * UPDATE FROM C. WILLIAMS TO M. RIPLEY 1607 EST 03/01/06 * * *

On February 23, 2006, SCE notified the NRC that a small leak had been identified from a tanker that was transporting wastewater with trace levels of radioactivity from SONGS to Clive, Utah. That incident was reported to the NRC in accordance with 10CFR50.72.(b)(2)(xi) and the Utah Division of Radiation Control. SCE is updating this report to provide the NRC with the following remediation status: 1. SCE has decontaminated the tanker exterior and the leaking flange has been repaired. On February 24, 2006, the tanker completed its trip to the disposal site in Clive, Utah. Enroute, SCE personnel followed the tanker and inspected the flange at planned stops every hour. No leakage was observed and the tanker was received at the disposal facility without further incident. 2. SCE surveyed the truck stop in Parowan and identified two contaminated locations. The first was an asphalt area near the diesel pumps; the second was a gravel area where the truck had parked (about 150 yards from the diesel pumps). All contaminated materials including asphalt, concrete, dirt, and gravel were removed and shipped to the disposal site in Clive, Utah. No detectable levels of licensed material remain at the truck stop. 3. SCE surveyed personnel at the truck stop and determined that one individual had been contaminated. The pants leg of the trucking supervisor who had climbed on top of the truck to stop the leak had been contaminated (SCE took possession of the contaminated garment). There was no contamination on his skin. 4. Approval was obtained from the Utah Division of Radiation Control, the remediated areas of the truck stop were backfilled. 5. SCE is continuing to investigate the cause of the flange leak and will implement appropriate corrective actions. The NRC resident Inspectors have been notified of this update and will be provided with a copy of this update. Notified R4 DO (J. Whitten) and NMSS EO (S. Flanders)

ENS 4061928 March 2004 21:49:0010 CFR 50.72(b)(2)(xi), Notification to Government Agency or News ReleaseOffsite Notification at San Ofre 2 and 3 Due to Inadvertent Weapon DischargeAt about 1349 (PST) on March 28, 2004, while a Security Offer was receiving his weapon in the armory, the weapon accidentally discharged as it was being holstered. The discharge grazed the officer's leg and the officer was treated for the resulting abrasion. At about 1425 PST, Southern California Edison notified the FBI (SONGS LLEA). SCE is reporting this occurrence in accordance with 10CFR50.72(b)(2)(xi). The NRC Resident Inspector was notified.