05000370/LER-2011-001, Regarding Emergency Diesel Generator 2B Inability to Achieve Overload Operation
| ML11285A305 | |
| Person / Time | |
|---|---|
| Site: | Mcguire |
| Issue date: | 10/03/2011 |
| From: | Repko R Duke Energy Carolinas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| LER 11-001-00 | |
| Download: ML11285A305 (7) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 3702011001R00 - NRC Website | |
text
PDuke Energy REGIS T. REPKO Vice President McGuire Nuclear Station Duke Energy MG01VP / 12700 Hagers Ferry Rd.
Huntersville, NC 28078 980-875-4111 980-875-4809 fax regis. repko@duke-energy. com October 3, 2011 10 CFR 50.73 U.S. Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, D.C. 20555
Subject:
Duke Energy Carolinas, LLC McGuire Nuclear Station, Unit 2 Docket No. 50-370 Licensee Event Report 370/2011-01, Revision 0 Problem Investigation Process Number M-1 1-05505 Pursuant to 10 CFR 50.73 Sections (a) (1) and (d), attached is Licensee Event Report (LER) 370/2011-01, Revision 0, regarding the 2B Emergency Diesel Generator's inability to achieve overload operation.
This report is being submitted in accordance with 10 CFR 50.73 (a) (2) (i) (B), an operation prohibited by Technical Specifications.
This event has 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.
Sincerely, Regis T. Repko Attachment www. duke-energy. corn
U.S. Nuclear Regulatory Commission October 3, 2011 Page 2 cc:
V. M. McCree, Regional Administrator U.S. Nuclear Regulatory Commission, Region II Marquis One Tower 245 Peachtree Center Ave., NE, Suite 1200 Atlanta, Georgia 30303-1257 Jon H. Thompson (Addressee Only)
Senior Project Manager (McGuire)
U.S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852-2738 John Zeiler Senior Resident Inspector U.S. Nuclear Regulatory Commission 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
Unit Status: At the time of the event, Units 1 and 2 were in Mode 1 at 100% power.
Event Description
On 8/2/11, Emergency Diesel Generator (EDG) 2B did not meet overload acceptance criteria (Technical Specification Surveillance Requirement 3.8.1.14). EDG 2B achieved 4150 kilowatts (kW) versus the required 4200 kW. It was subsequently determined EDG 2B was inoperable from 7/16/11. EDG 2A was also inoperable from 7/19/11, 04:36 to 7/20/11, 04:01. This event is not safety significant since EDG 2B was available to provide power to the required emergency loads of approximately 3900 kW.
Event Cause
The root cause is lack of documented guidance on engine fuel rack linkage setting requirements in the original engine manufacturer (OEM) drawings which resulted in an inadequate governor actuator replacement setup procedure.
Corrective Actions
The governor actuator replacement setup procedure was revised to require engine fuel rack linkage adjustment any time a governor is removed and replaced.
NRC FORM 366 (10-2010)
(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)
ADDITIONAL INFORMATION
To determine if this event is recurring, a search of the McGuire Problem Identification Process (PIP) database was conducted for a time period covering 5 years prior to the date of this event. Three PIPs were found but they were not recurring because the combination of equipment, administrative controls, personnel actions and causes for those events are not similar to those in this event. Therefore, this event is not considered recurring.
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