05000270/LER-2010-001, For Oconee, Unit 2 Regarding Operation Prohibited by TS Due to Removal of West Penetration Room Brick Wall Support Girts
| ML102590482 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 09/13/2010 |
| From: | Baxter D Duke Energy Carolinas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| LER 10-001-00 | |
| Download: ML102590482 (8) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i) |
| 2702010001R00 - NRC Website | |
text
Duke DAVE BAXTER Vice President EEnergy.
Oconee Nuclear Station Duke Energy ON01 VP / 7800 Rochester Highway Seneca, SC 29672 864-873-4460 864-873-4208 fax dave. baxter@duke-energy. com September 13, 2010 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C.
20555
Subject:
Oconee Nuclear Station Docket No. 50-270 Licensee Event Report 270/2010-01, Revision 0 Problem Investigation Process No.: 0-10-5561 Gentlemen:
Pursuant to 10 CFR 50.73 Sections (a) (1) and (d),
attached is Licensee Event Report 270/2010-01, Revision 0, regarding operation in a condition prohibited by Oconee Technical Specifications.
The prohibited condition was an inoperable Standby Shutdown Facility (SSF) for a period of time which exceeded the required action time allowed by Limiting Condition for Operation (LCO) 3.10.1.
This report is being submitted in accordance with 10 CFR 50.73 (a) (2) (i)
(B).
There are no regulatory commitments contained in this report.
This event is considered to be of no significance with respect to the health and safety of the public.
Cause analysis for this event is not yet complete.
Results will be provided in a supplement to this report.
Iva9~
www. duke-energy. com
Document Control Desk Date: September 13, 2010 Page 2 Any questions regarding the content of this report should be directed to Russ Oakley at 864-873-3829.
Sincerely, Dave Baxter, Vice President Oconee Nuclear Site Attachment
Abstract
On July 14,
- 2010, Oconee Nuclear Station (ONS) discovered that workers had removed support girts from the Unit 2 West Penetration Room brick wall that were required to maintain seismic adequacy of the wall.
Failure of this wall could damage Standby Shutdown Facility (SSF) cables.
Damage to these cables could have caused the SSF Reactor Coolant Makeup and Auxiliary Service Water functions to be inoperable for a
seismically-induced Turbine Building Flood Event.
Technical Specification (TS) Limiting Condition for Operation (LCO) 3.10.1 was not met in this condition.
This condition existed for approximately fourteen days, which exceeded the seven-day required action time of the LCO.
Consequently, ONS Unit 2 operated in a condition prohibited by TS for approximately seven days as a result of this condition.
Prompt corrective action was taken to re-install the required support girts.
This work was completed on July 16, 2010.
This event is of no significance with respect to public health and safety.
NRC FORM 366 (7-2001)
(If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A)
Energy Industry Identification System (EIIS) codes are identified in the text within brackets
[ ].
There were no releases of radioactive materials, radiation exposures or personnel injuries associated with this event.
This event is not considered reportable under the Equipment Performance and Information Exchange (EPIX) program.
NRC FORM 366 (7-2001)