05000348/LER-2013-001, Unit 1, Automatic Reactor Trip and B-Train Loss of Off-Site Power Caused by the Failure of a Startup Transformer Lightning Arrester
| ML13221A271 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 08/08/2013 |
| From: | Lynch T Southern Nuclear Operating Co |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| NL-13-1603 LER 13-001-00 | |
| Download: ML13221A271 (6) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(viii)(8) 10 CFR 50.73(a)(2)(iv)(A), System Actuation 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(v), Loss of Safety Function |
| 3482013001R00 - NRC Website | |
text
Thomas A. Lvnch Vice President - Farley Southern Nuclear Operating Company, Inc.
Farley Nuclear Plant Post Office Drawer 470 Ashford, Alabama 36312 Tel 334.814.4511 Fax 334.814.4728 August 8, 2013 Docket No.:
50-348 NL-13-1603 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Joseph M. Farley Nuclear Plant - Unit 1 Licensee Event Report 2013-001-00 Automatic Reactor Trip and B-Train Loss of Off-Site Power Caused by the Failure of a Startup Transformer Lightning Arrester Ladies and Gentlemen:
In accordance with the requirements of 10CFRSO.73(a)(2)(iv)(A) Southem Nuclear Operating Company hereby submits the enclosed Licensee Event Report. This letter contains no NRC commitments. If you have any questions, please contact Bill Arens at (334) 814-4765.
Sincerely, r~
T. A. LynCh Vice President - Farley TALlWNA Enclosure: Unit 1 Licensee Event Report 2013-001-00
U. S. Nuclear Regulatory Commission NL-13-1 2
cc:
Mr.
E. Kuczynski, Chairman, President &CEO Mr. D.
Bost, Executive Vice President &
Nuclear Officer Mr. B. L. Ivey, Vice President - Regulatory Affairs Mr. B. J. Adams, President -
Operations Mr. C. R. Pierce, Regulatory Director Mr. J. G. Horn, Regulatory Affairs Manager - Farley CFA04.054 Mr. V. M. McCree, Regional Administrator Mr. R. E. Martin, NRR Project Manager Farley Mr.
K. Niebaum, Senior Resident - Farley
Joseph M. Farley Nuclear Plant - Unit 1 NL-13-1 Automatic Reactor Trip and 8-Train of Off-Site Power Caused by the Failure of a Startup Transformer Lightning Arrester Enclosure Unit 1 Licensee Event Report 2013-001-00
RCFORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED SY OMS: NO. 3150-0104 EXPIRES: 08/31/2010 9-20(7)
, the NRC may not conduct or sponsor, and a person is not required to respond 10, the information collection,
- 2. DOCKET NUMBER
- 3. PAGE 05000348 1 OF 3
- 8. OTHER FACILITIES INVOLVED FACILITY NAME DOCKET NUMBER FACILITY NAME 08 I 108 I 2013 I
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check al/ that apply) 20.2201 (b) 20.2203(a)(3)(i) 0 50.73(a)(2)(i)(C) 50,73(a)(2)(vii) 1 20.2201 (d) 0 20.2203(a)(3)(II) 0 50.73(a)(2)(U)(A) 50,73(a)(2)(viii)(A) o 20.2203(a)(l) 20.2203(a)(4) 50.73(a)(2)(ii)(B) 0 50.73(a)(2)(viii)(8)
......~~~~~_-liD::; 20,2203(a)(2)(I) 50.36(c)(1)(i)(A) 50.73(a)(2)(III) 0 50.73(a)(2)(lx)(A)
O. POWER LEVEL 20.2203(a)(2){il) 50.36(c)(1)(ii)(A) tEl 50.73(a)(2)(iv)(A) 0 50.73(a)(2)(x) 20.2203(a)(2)(ill) 0 50.36(c)(2) 50.73(a)(2)(v)(A) 73.71 (a)(4) o 20.2203(a)(2)(iv) 0 50.46(a)(3)(ii) 50.73(a)(2)(v)(B) 0 73.71 (a)(5) 100 20.2203(a)(2)(v) 50.73(a)(2)(i)(A) 50.73(a)(2)(v)(C)
OTHER o 20.2203(a)(2)(vi) 50.73(a)(2)(I)(B) 0 50.73(a)(2)(v)(D)
Specify in Abstracl below or in =
(If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A)
Safety Assessment
All systems responded as designed to the reactor trip and the B*Train LOSP. The buses were automatically re-energized from the B-Train emergency diesel generator.
The A-Train ESF remained powered from off-site power with an operable emergency diesel generator available to supply backup power if needed. No major components or systems were out of service during event. All equipment operated as-designed to mitigate the event. There was no loss of safety function and no radioactive release associated with this event. There was no actual consequence detrimental to the health and safety of the public.
Corrective Action
A root cause analysis of this event identified that all lightning arresters of this vintage may have a higher susceptibility to moisture intrusion due to the manufacturing and acceptance test procedures that were in place at the time. Corrective actions include the implementation of an accelerated schedule for replacement of lightning arresters of the same vintage.
Additional Information
Similar previous events LER 2012-004-00 Unit 1 Unplanned B Train LOSP During Switchyard Breaker Testing 2012-003-00 Unit 1 - Unplanned LOSP during SI with LOSP Testing LER 2010-001-00 Unit 2 - Unplanned LOSP during SI with LOSP Testing