05000369/LER-2010-004, Regarding Improper Technical Specification Application When Diesel Generator Starting Air. Receivers Cross-Tied
| ML103400087 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 11/23/2010 |
| From: | Repko R Duke Energy Carolinas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| LER 10-004-00 | |
| Download: ML103400087 (10) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 3692010004R00 - NRC Website | |
text
Duke REGIS T. REPKO Vice President SEnergy@
McGuire Nuclear Station Duke Energy MG01 VP / 12700 Hagers Ferry Rd.
Huntersville, NC 28078 980875-4111 980-875-4809 fax regis.repko@duke-energy.com November 23, 2010 U.S. Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, D.C. 20555
Subject:
Duke Energy Carolinas, LLC (Duke Energy)
McGuire Nuclear Station, Units 1 and 2 Docket Nos. 50-369 and 50-370 Licensee Event Report 369/2010-04, Revision 0 Problem Investigation Process No.: M-10-05299 Pursuant to 10 CFR 50.73 Sections (a)(1) and (d), attached is Licensee Event Report (LER) 369/2010-04, Revision 0, regarding operation of the diesel generator starting air system not in accordance with Technical Specifications.
This report is being submitted in accordance with 10 CFR 50.73 (a)(2)(i)(B), an operation prohibited by Technical Specifications. This event is considered to be of no significance with respect to the health and safety of the public. There are no regulatory commitments contained in this LER.
If questions arise regarding this LER, please contact P.T. Vu at (980) 875-4302.
Very truly yours, Regis T. Repko Attachment www. duke-energy. com
U.S. Nuclear Regulatory Commission November 23,.2010 Page 2 cc:
L. A. Reyes Administrator, Region II U.S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, GA 30303-1257 J. H. Thompson Project Manager (McGuire)
U.S. Nuclear Regulatory Commission 11555 Rockville Pike Mail Stop 0-8 G9A Rockville, MD 20852-2738 J. B. Brady NRC Senior Resident Inspector McGuire Nuclear Station W. L. Cox III Section Chief North Carolina Department of Environment and Natural Resources
.Division of Environmental Health Radiation Protection Section 1645 Mail Service Center Raleigh, NC 27699-1645'
Abstract
The two sub-trains of the starting air system for each diesel generator had been cross-tied during maintenance activities without complying with Technical Specification (TS) Required Actions.
This event was determined reportable per 10 CFR 50.73(a)(2)(i)(B) -
Operations Prohibited By Technical Specifications.
The root cause was an inadequate 10 CFR 50.59 Evaluation associated with a Nuclear Station Modification (NSM) in 1994.
The contributing causes were deviation from Westinghouse Standard TS (NUREG-1431),
misapplication of TS Condition, vague Safety Evaluation wording, and inadequate Updated Final Safety Analysis Report (UFSAR).
This event is considered to have ho significance with respect to the health and safety of the public.
Significant corrective actions include evaluating additional NSMs and associated 10 CFR 50.59 Evaluations, revising the affected UFSAR, and submitting a License Amendment Request to revise the affected Technical Specification.
NRC FORM 366 (7-2001)
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ADDITIONAL INFORMATION
To determine if this event is recurring, a search of the McGuire PIP database using this event's cause codes, event codes, action categories, detailed problem description key words, and discovery date within the last five years was conducted.
After further evaluation, no similar event was found; therefore, this event is not considered recurring.
NRC FORM 366 (7-2001)