05000424/LER-2013-001, Unit 1, Regarding Failure to Comply with Technical Specification LCO 3.8.4

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Unit 1, Regarding Failure to Comply with Technical Specification LCO 3.8.4
ML14016A180
Person / Time
Site: Vogtle 
Issue date: 01/15/2014
From: Tynan T
Southern Co, Southern Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-14-0055 LER 13-001-00
Download: ML14016A180 (6)
v • d • e


LER-2013-001, Unit 1, Regarding Failure to Comply with Technical Specification LCO 3.8.4
Event date:
Report date:
Reporting criterion: 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
10 CFR 50.73(a)(2)(1)
10 CFR 50.73(a)(2)
10 CFR 50.73(a)(2)(v), Loss of Safety Function
4242013001R00 - NRC Website
v • d • e

text

Tom E. Tynan Vice President VogUe *Units 1 & 2 January 15, 2014 Docket No.:

50-424 Southern Nuclear Operating Company, Inc.

7821 River Road Waynesboro. GA 30830 Tel 706826.3151 Fax 205.980.3321 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 SOUTHERN A COMPANY NL-14-0055 Vogtle Electric Generating Plant-Unit 1 Licensee Event Report 2013-001-00 Failure to Comply with Technical Specification LCO 3.8.4 Ladies and Gentlemen:

In accordance with the requirements of 10 CFR 50.73 (a)(2)(i)(B), Southern Nuclear Operating Company (SNC) is submitting the enclosed Licensee Event Report. This letter contains no NRC commitments. If you have any questions, please contact Doug McKinney at (205) 992-5982.

Respectfully submitted,

/.1.1~

T. E. Tynan Vice President-Vogtle TET/GWG Enclosure: Unit 1 Licensee Event Report 2013-001-00 cc:

Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Bost, Executive Vice President & Chief Nuclear Officer Mr. B. L. lvey, Vice President-Regulatory Affairs Mr. D.R. Madison, Vice President-Fleet Operations

Page2 Docket No: 50-424 Mr. C.R. Pierce, Regulatory Affairs Director Mrs. M. A. Cline, Vogtle OE Coordinator RType: CVC7000 U. S. Nuclear Regulatory Commission Mr. V. M. McCree, Regional Administrator Mr. R. E. Martin, NRR Senior Project Manager-Vogtle Mr. L. M. Cain, Senior Resident Inspector-Vogtle NL-14-0055

Vogtle Electric Generating Plant Plant-Unit 1 Licensee Event Report 2013-001-00 Failure to Comply with Technical Specification LCO 3.8.4 Enclosure Unit 1 Licensee Event Report 2013-001-00

NRCFORM368 U.S. N.UCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150.0104 EXPIRES: 10131/2013 (10.2010)

, the NRC may not conduct or sponsor, and a person Is not required to respond to, the Information collactlon.

1. FACIUTY NAME
2. DOCKET NUMBER
13. PAGE 1

Vogtle Electric Generating Plant - Unit 1 05000-424 OF 3

~TITlE Failure to Comply with Technical Specification LCO 3.8.4

5. EVENT DATE
6. LER NUMBER
7. REPORT DATE
8. OTHER FACIUnES INVOLVED SEQUENTIAL REV FACIUTY NAME DOCI<ET NUMBER MONTH DAY YEAR YEAR NUMBER NO.

MONTH DAY YEAR 16 2014 FACIUTY NAME DOCKET NUMBER 11 27 2013 2013 00 01

9. OPERAnNG MODE
11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check aU that apply) 0 20.2201 (b) 0 20.2203(8)(3)(1) 0 50.73(a)(2)(1)(C) 0 50. 73(8)(2)(vll) 1 0 20.2201(d) 0 20.2203(a)(3)(11) 0 50. 73(a)(2)(11)(A) 0 50. 73(a)(2)(viii)(A) 0 20.2203(8)(1) 0 20.2203(a)(4) 0 50.73(a)(2)(11)(B) 0 50.73(8)(2)(viii)(B)

D 20.2203(8)(2)(1) 0 50.36(c:)(1)(1)(A)

D 50.73(a)(2)(111) 0 50.73(a)(2)(1x)(A)

10. POWER LEVEL 0 20.2203(8)(2)(11) 0 50.36(c:)(1)(11)(A) 0 50. 73(a)(2)(1v)(A) 0 50. 73(8)(2)(x) 0 20.2203(8)(2)(111) 0 50.36(c:)(2) 0 50. 73(a)(2)(v)(A) 0 73.71(a)(4) 100 0 20.2203(a)(2)(1v) 0 50.46(8)(3)(11) 0 50. 73(a)(2)(v)(B) 0 73.71(a)(5) 0 20.2203(8)(2)(v) 0 50.73(a)(2)(1)(A) 0 50.73(a)(2)(v)(C) 0 OTHER 0 20.2203(8)(2)(vl) 181 50.73(a)(2)(1)(B) 0 50. 73(a)(2)(v)(D)

Specify In Abstract below or In NRC Form 388A

12. UCENSEE CONTACT FOR THIS LER FACIUTY NAME

~~EPHONE NUMBER (lnducle Alea Code)

Vogtle Electric Generating Plant I George Gunn, Ucensing Supervisor

{706) 826-3596

13. COMPLETE ONE UNE FOR EACH COMPONENT FAILURE DESCRIBED IN THIS REPORT

CAUSE

SYSTEM COMPONENT MANU*

REPORTABLE

CAUSE

SYSTEM COMPONENT MANU*

REPORTABLE FACTURER TOEPIX FACTURER TOEPIX B

EJ BYC A363 y

14. SUPPLEMENTAL REPORT EXPECTED
15. EXPECTED MONTH DAY YEAR 0 YES (If yes, complete 15. EXPECTED SUBMISSION DATE) 181 NO SUBMISSION DATE

~BSTRACT (Umlt to 1400 spaces, I.e., approximately 15 single-spaced typewritten lines)

On November 27, 2013, an Internal wiring discrepancy was discovered on Class 1 E battery charger 1AD1CB [EJ] following the trip of the battery charger AC input breaker. The wiring discrepancy prevented the battery charger from performing all required functions of LCO 3.8.4, DC Sources -

Operating. One of two redundant battery chargers and one battery per train must be operable to meet the requirements of LCO 3.8.4. Subsequent review of battery charger maintenance activities determined that on September 30, 2013 the remaining redundant operable battery charger was removed from service for maintenance activities for approximately 14.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. LCO 3.8.4, DC Sources - Operating requires restoration of the inoperable DC source within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or entry into Mode 3 within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and entry into Mode 5 within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Although the degraded charger was able to maintain battery terminal voltage within limits under minimal loading condition, the DC source was inoperable for a time greater than allowed by Technical Specification.

The safety significance of this event is very low. Unit 2 was not affected and there were no adverse effects to the health and safety of the public.

NRC FORM 3ee (1~2010)

D. CAUSE OF EVENT

8. LER NUMBER I

SEQUENTIAL I REVISION NUMBER NUMBER 01 00 3

3. PAGE OF 3

The direct cause of the event was a wiring error on the battery charger slave rectifier bridge, with failure to properly address the wiring error upon discovery during the receipt inspection and a Jess than adequate functional test prior to placing the battery charger in service.

E. SAFETY ASSESSMENT

This event was evaluated using the internal events Probabilistic Risk Assessment model and the Incremental Core Damage Probability was determined to be Jess than 1 E-06; therefore, this event is of very low safety significance. The Class 1 E batteries are rated for 2. 75 hours8.680556e-4 days <br />0.0208 hours <br />1.240079e-4 weeks <br />2.85375e-5 months <br /> of continuous operation under full load, accident conditions. The redundant, operable battery charger, once the loss of DC source was identified, was returned to service in Jess than 45 minutes. Therefore under accident conditions an operable DC source could have been established in a timely manner.

F. CORRECTIVE ACTION

The functional test procedure for installation of future battery chargers and the battery charger calibration procedures will include adequate checks for proper rectifier operation.

In addition, engineering personnel have been briefed on this event including consequences and lessons learned.

G. ADDITIONAL INFORMATION

1) Failed Components:

AMETEK 125 VDC Battery Charger

2) Previous Similar Events:

None

3) Energy Industry Identification System Code:

[EJ] - DC Power Systems, Class 1 E

4) Other Systems Affected:

None

5) Commitment Information:

This report does not create any commitments.

NRC FORM 368A (11>2010)

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