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| Entered date | Event description | |
|---|---|---|
| ENS 54452 | 18 December 2019 15:27:00 | On December 18, 2019, at 0908 EST, with the East and Center Reactor Building HVAC (RBHVAC) trains in service, secondary containment pressure degraded to the point where the Technical Specification (TS) requirement for secondary containment pressure was not met and secondary containment was declared inoperable. Secondary containment pressure did not meet the TS required limit for approximately four minutes. The maximum secondary containment pressure observed during that time was approximately 0.064 inches of vacuum water gauge. Secondary containment pressure was returned to within the TS operability limit of greater than or equal to 0.125 inches of vacuum water gauge (TS SR 3.6.4.1.1) by starting Division 1 of the Standby Gas Treatment System (SGTS). Secondary containment was declared Operable at 0912 EST. A modulating damper associated with the Center train of RBHVAC was identified as not properly controlling; an investigation is in progress. RBHVAC was manually secured to support problem identification and resolution. Secondary containment pressure is currently stable with Division 1 SGTS in service. There were no radiological releases associated with this event. Declaring secondary containment inoperable is reportable under 10 CFR 50.72(b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material. The NRC Resident Inspector has been notified. |
| ENS 54188 | 30 July 2019 15:42:00 | On July 30, 2019, at 1014 EDT, the Division 2 Mechanical Draft Cooling Tower (MDCT) Fan D was declared inoperable due to a trip of the fan while placing in it high speed. The MDCT Fans are required to support operability of the Ultimate Heat Sink (UHS). The UHS is required to support operability of the Division 2 Emergency Equipment Cooling Water (EECW) system. The EECW system cools various safety related components, including the High Pressure Coolant Injection (HPCI) system room cooler. An unplanned HPCI inoperability occurred based on a loss of the HPCI Room Cooler. Investigation revealed that a high speed breaker control power fuse had blown. The control power fuse was replaced, the MDCT Fan D was tested satisfactorily, and HPCI was declared operable at 1431 EDT. This report is being made pursuant to 10 CFR 50.72(b)(3)(v)(D) based on an unplanned HPCI inoperability. The licensee has notified the NRC Senior Resident Inspector |
| ENS 53982 | 5 April 2019 12:19:00 | EN Revision Text: FITNESS-FOR-DUTY: FALSIFIED PRE-EMPLOYMENT INFORMATION A non-licensed employee falsified pre-employment information. The employee's access to the plant has been terminated.
The following event notifications are retracted: EN 53822 reported on 1/11/2019 and EN 53982 reported on 4/5/2019. Subsequent to the initial notification, further investigation revealed that no new information was discovered that would meet the criteria for reporting under RG 5.62 or NUREG-1304. Further the events were also determined to be limited to an act of personal deception by those applying for unescorted access, without intent to commit or cause events identified in paragraphs I (a) and (d) of Appendix G to Part 73, and is not a programmatic breakdown. Based on this information, and consistent with the NRC memorandum dated May 19, 1995, 'Access Authorization Reportability and Enforcement Issues,' this event does not meet the threshold for reporting. The NRC Resident Inspector has been notified. Notified R3DO (Cameron) and via E-mail the FFD E-mail group. |