ENS 43907
ENS Event | |
|---|---|
20:15 Jan 15, 2008 | |
| Title | Unusual Event - Loss of Offsite Power |
| Event Description | At 1404 1/15/2008, Central time, Point Beach experienced a loss of Unit 1X-04, Low Voltage Station Auxiliary Transformer. This loss has caused Point Beach to declare an Unusual Event (SU 1.1, Loss of all Offsite Power to essential busses for greater than 15 minutes.)
The loss of Unit 1X-04 transformer is under investigation. All equipment operated properly with the exception of 1B-04, 'B' train 480 VAC Safeguards Bus, supply breaker opened for unknown reasons. The licensee notified the NRC Resident Inspector. Preparations are underway for a Unit 1 shutdown. Both Unit 1 EDGs are running and supplying Unit 1 safeguard buses. Non-safety buses are powered from an auto transfer that occurred after the loss of 1X-04. No impact on Unit 2 due to the Unit 1 electrical transient. Licensee notified state and local emergency management agencies.
On 1/15/08 at 1941 central time, FPL Energy Point Beach, LLC issued a press release concerning the Unusual Event at Point Beach that was declared on 1/15/08 at 1415 central time. The Unusual Event was reported under EN# 43907 and occurred due to the loss of all offsite power to essential busses for greater than 15 minutes from the failure of the Unit 1 X-04, Low Voltage Station Auxiliary Transformer. The NRC Resident Inspector has been informed of the press release and this subsequent notification.
At 1404 on 1/15/08 central time, Point Beach experienced a loss of Unit 1 X-04, Low Voltage Station Auxiliary Transformer. This loss caused Point Beach to declare an Unusual Event and that was reported under EN# 43907. Technical Specification 3.8.1.B, Associated unit's 13.8/4.16 kv (X04) transformer inoperable, was not met as of 1404 on 1/15/08 and this LCO has a Required Action to restore the (X04) transformer to Operable status with a Completion time of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. At 1404 1/16/08 the LCO was still not met and Unit 1 entered Technical Specification 3.8.1.H Required Action and associated Completion Time Not met, with a required action to be in Mode 3 in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and Mode 5 in 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. This Event Notification Worksheet is for the initiation of the Technical Specification Required reactor shutdown that commenced at 1549 on 1/16/08, per 10 CFR 50.72(b)(2)(i). The licensee notified the NRC Resident Inspector. Notified R3DO(Stone), NRR EO(Evans), and IRD(Blount).
Update: At 1947 CST on 01/16/08, the Unit 1 reactor reached MODE 3, completing the required Technical Specification Shutdown. Offsite power has been restored to the essential busses by paralleling from Unit 2 4160 V buses and the Emergency Diesel Generators G-01 and G-03 have been placed back to a normal standby alignment. The unit is being taken to MODE 5 in accordance with plant TS requirements. This update to EN #43907 also reports the termination of the Unusual Event [AT 2035 CST] SU1.1, Loss of all offsite power to essential buses for greater than 15 minutes initially reported via EN #43907. The State of Wisconsin and the counties of Kewaunee and Manitowoc were notified of the termination via the Nuclear Accident Reporting System (NARS) at 2041 on 1/16/08. The licensee notified the NRC Resident Inspector. Notified R3DO(Stone), NRR EO(Evans), NRR ET(Dyer), DHS(Gray), FEMA(Dunker), and IRD(Blount).
Update: At 0702 CST on 01/17/08, FPL Energy Point Beach, LLC issued a press release regarding the termination of the Unusual Event and the shutdown of Unit 1 for repair of 1- X04 transformer. The NRC resident inspector was notified of the press release." R3DO (Stone) notified. |
| Where | |
|---|---|
Point Beach  Wisconsin (NRC Region 3) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| LER: | 05000266/LER-2008-001 |
| Time - Person (Reporting Time:+-4.02 h-0.168 days <br />-0.0239 weeks <br />-0.00551 months <br />) | |
| Opened: | Tom Jessessky 16:14 Jan 15, 2008 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Jan 17, 2008 |
| 43907 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Point Beach with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
WEEKMONTHYEARENS 530042017-10-09T12:37:0009 October 2017 12:37:00
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Required Shutdown Due to 72 Hour Completion Time Not Met ENS 431012007-01-15T19:21:00015 January 2007 19:21:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Oil Spill ENS 429132006-10-17T13:32:00017 October 2006 13:32:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Press Release ENS 429122006-10-17T02:26:00017 October 2006 02:26:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event - Identified Leakage Greater than 25 Gpm ENS 424352006-03-20T23:11:00020 March 2006 23:11:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Oil Spill Onsite ENS 424262006-03-17T13:58:00017 March 2006 13:58:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Local Sheriff Contacted ENS 421092005-11-02T05:00:0002 November 2005 05:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech Spec Required Shutdown Due to Degradation of Containment Coatings ENS 414472005-02-27T17:58:00027 February 2005 17:58:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Loss of Dc Battery Chargers ENS 412122004-11-19T22:22:00019 November 2004 22:22:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to a Steam Leak on an Instrument Isolation Valve Inside Containment ENS 409402004-08-11T13:30:00011 August 2004 13:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of State Agency Regarding Potentially Oil Contaminated Soil ENS 408222004-06-16T19:59:00016 June 2004 19:59:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Emergency Sirens Inadvertently Activated ENS 406262004-03-30T18:15:00030 March 2004 18:15:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Safety Injection Accumulator Level Greater than Allowed by Technical Specification 2017-03-20T21:20:00 | |