Semantic search
| Entered date | Event description | |
|---|---|---|
| ENS 53015 | 14 October 2017 16:37:00 | At approximately 19:48 Mountain Standard Time on October 13, 2017, Palo Verde Nuclear Generating Station (PVNGS) staff confirmed a non-licensed supervisor tested positive for drugs during a random 'Fitness for Duty' test. The person's access authorization was terminated in accordance with station procedures. The NRC resident inspector has been notified by the licensee. |
| ENS 49416 | 7 October 2013 12:55:00 | The following event description is based on information currently available. If through subsequent reviews of this event additional information is identified that is pertinent to this event or alters the information being provided at this time a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73. At approximately 2100 MST on 10/06/13, while performing planned routine visual examinations of the Unit 3 reactor vessel bottom mounted instrumentation (BMI) nozzles, a white residue was identified around the annulus region of BMI penetration number 3. The BMI visual examinations are performed using remote video and photographic equipment to meet the in-service inspection requirements of 10 CFR 50.55a(g)(6)(ii)(E) and ASME Code Case N-722-1. At this time, no other indications of leakage have been identified and inspections of the remaining BMI penetrations are ongoing. Following review of the photographic images by qualified engineering personnel, at 0219 (MST) on 10/07/13, it was determined, based on past and present photographic evidence, the white residue is most likely dry boric acid resulting from reactor coolant system pressure boundary leakage. An activity to sample and analyze the white residue is being planned and will be performed as soon as possible. This notification is being made for a degraded condition pursuant to the requirements of 10 CFR 50.72(b)(3)(ii)(A). The NRC Resident Inspectors have been informed of this condition. |
| ENS 48347 | 26 September 2012 19:49:00 | This event is being reported as a newsworthy concern to the public under 10 CFR 50.72(b)(2)(xi). All times listed are approximate Mountain Standard Time. On September 26,2012, at 13:36 pm, Arizona Public Service (APS) was notified of the intention of Maricopa County Sheriff's Office (MCSO) to issue a press release regarding an attempted entry to the Palo Verde Nuclear Generating Station's (PVNGS) Security Owner Controlled Area (SOCA) by an individual with suspicious identification earlier this morning. An individual employed with a construction project sub-contractor arrived at the SOCA checkpoint and presented suspicious identification to PVNGS security officers to gain access to the site. The individual was not admitted through the checkpoint into the SOCA. MCSO was notified and placed the individual into custody. MCSO determined the identification was false and the individual was an undocumented immigrant. The individual did not enter nor was he previously granted access to the site's Protected Areas surrounding the three units and Independent Spent Fuel Storage Installation. No evidence of malicious intent has been identified. MCSO is investigating the incident. The station notified NRC Resident Inspectors and Region IV staff of the condition. APS does not intend at this time to issue a press release, but is responding to media inquiries. |
| ENS 46188 | 18 August 2010 16:30:00 | On August 18, 2010, at approximately 0742 Mountain Standard Time (MST), the Palo Verde Emergency Preparedness Department discovered that public warning system sirens Nos. 17, 23, and 34 were not responding, and therefore, were out of service. The loss of these sirens could potentially impact a population of approximately 1800 people in the 5-mile emergency planning zone (EPZ). Since the loss of these sirens could impair Arizona Public Service Company's ability to inform greater than 5% of the population within the EPZ, this notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii). If an event occurs while the sirens are out of service, the Palo Verde Emergency Plan has a contingency for dispatching Maricopa County Sheriff's Office (MCSO) vehicles with loud speakers to alert persons within the affected area. The MCSO is prepared to implement this contingency should it become necessary. Troubleshooting to determine the cause of the failure has commenced. The NRC Resident Inspector has been notified of the out of service sirens and this ENS call. (At the time of the notification to the NRC), siren #23 was restored at 1316 MST. The out of service sirens are now Nos. 17 and 34 with an affected population of 1196 within the 5 mile EPZ.
The licensee restored siren #17 at 1647 MST on 8/18/10. The restoration of this siren provided coverage to all the population within the 5-mile EPZ. The licensee has notified the NRC Resident Inspector and will also notify State and local authorities. R4DO (Miller) notified. |
| ENS 45968 | 1 June 2010 15:36:00 | The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73. On June 01, 2010, at approximately 0715 Mountain Standard Time (MST), the Palo Verde Emergency Planning Department discovered that public warning system siren No. 17 was not responding, and therefore, is out of service. The loss of siren No. 17 could potentially impact a population of approximately 1196 people in the 5-mile Emergency Planning Zone (EPZ). Since the loss of siren No. 17 could impair Arizona Public Service Company's ability to inform greater than 5% of the population within the EPZ, this notification is being made in accordance with 10 CFR 10.72(b)(3)(xiii). If an event occurs while siren No. 17 is out of service, the Palo Verde Emergency Plan has a contingency for dispatching Maricopa County Sheriff's Office (MCSO) vehicles with loud speakers to alert persons within the affected area. The MCSO is prepared to implement this contingency should it become necessary. The NRC Resident Inspector has been notified of siren No. 17 being out of service and this ENS call.
Siren number 17 was returned to service at 1435 MST. The NRC Senior Resident Inspector has been notified. The remote radio was replaced and all post-maintenance testing was completed. Notified R4DO (Werner). |