Semantic search
| Entered date | Event description | |
|---|---|---|
| ENS 48626 | 26 December 2012 15:56:00 | At 0922 on 12/26/2012, R-16, Service Water System Effluent Line Radiation Monitor (for Containment Fan Cooling service water) was removed from service for scheduled maintenance. R-16 is used for Emergency Action Level (EAL) classifications of an unplanned release of liquid radioactivity to the environment that exceeds the requirements of the Offsite Dose Calculation Manual for an Unusual Event and an Alert, and is therefore being conservatively reported under 10 CFR 50.72(b)(3)(xiii) as a loss of emergency assessment capability. The maintenance was completed and R-16 restored at 1308 on 12/26/2012. R-16 is also scheduled to be removed from service for calibration on 12/27/2012 from 0800 -1400 CST. The licensee has notified the NRC Resident Inspector. |
| ENS 48431 | 22 October 2012 14:46:00 | At 0745 CDT on 10/22/2012, Dominion announced its plan to permanently shutdown and decommission the Kewaunee Power Station. A local press release was made at 1100 (CDT) on 10/22/2012. At 1139 (CDT), security reported that members of the local media were gathering on company property at the plants training facility which is located outside the Owner Controlled Area. At this time security reports no security issues and no other press releases are planned at this time. This event is being conservatively reported under 10 CFR 50.72(b)(2)(xi) for offsite notifications based on the press release and the notification to Midwest Independent System Operator (MISO) of the planned shutdown of the Kewaunee Power Station. The licensee notified the NRC Resident Inspector. |
| ENS 47755 | 20 March 2012 00:20:00 | At 1612 on 3/19/12 it was identified that an aerial lift was located in the Auxiliary Building stored in a seismic storage area near Train A and Train B safety related service water piping to Control Room Air Conditioning (CRAC) Alternate Cooling System. This resulted in both trains of Service Water being INOPERABLE per TS 3.7.8 and both trains of CRAC Alternate Cooling system per TS 3.7.11. At this time, there is no conclusive information that would support the OPERABILITY of the Service Water System during a seismic event therefore this event is being conservatively reported under 50.72(b)(3)(ii)(B), 'The nuclear plant being in an unanalyzed condition that significantly degrades plant safety.' and 50.72(b)(3)(v)(A) and (D) 'Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structure systems that are needed for: (A) shutdown the reactor and maintain it in a safe shutdown condition, (D) mitigate the consequences of an accident.' The aerial lift was removed and the plant is no longer in the condition noted above. The NRC Resident Inspector has been informed.
On March 19, 2012, EN #47755 provided notification that both service water trains were potentially inoperable based on the potential for an improperly stored aerial lift to tip onto the adjacent service water piping during a seismic event. The notification was conservatively made due to the lack of conclusive information regarding any potential interaction between the aerial lift and the service water piping during a seismic event. Subsequent investigation and analysis determined that physical characteristics of the aerial lift are such that it would not have adversely interacted with the service water piping. Therefore, both service water trains remained operable and this condition did not meet the reportability criteria identified in 10CFR50.72. As a result, the notification made on 3/19/2012 (EN #47755) is hereby retracted. The NRC Resident Inspector has been notified. Notified R3DO (Stone). |