NL-16-0683, Special Report No. 2016-002-00, Alternate AC Source Out of Service
| ML16155A194 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 06/02/2016 |
| From: | Gayheart C Southern Co, Southern Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NL-16-0683 SR-2016-002-00 | |
| Download: ML16155A194 (3) | |
Text
Cheryl A. Gayheart V1ce Pres1dent - Farley June 2, 2016 Docket Nos.: 50-364 Southern Nuclear Operating Company, Inc.
Farley Nuclear Plan!
Post Olf1ce Drawer 470 Ashford, AL 36312 Tei334.B14.4511 Fax 334 814 4575 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 SOUTHERN <<\\
NUCLEAR A SOUTHERN COMPANY NL-16-0683 Joseph M. Farley Nuclear Plant - Unit 2 Special Report No. 2016-002-00. Alternate AC Source Out of Service Ladies and Gentlemen:
In accordance with Section 5.6.11 of the Joseph M. Farley Nuclear Plant (FNP) Units 1 and 2 Technical Specifications, Southern Nuclear Operating Company (SNC) hereby submits the enclosed Special Report No. 2016-002-00 for Unit 2.
This letter contains no NRC commitments. If you have any questions, please contact Ms. Julie Collier at (334) 814-4639.
Sincerely, CAG/JAC
Enclosure:
Special Report No. 2016-002-00, Alternate AC Source Out of Service
U. S. Nuclear Regulatory Commission NL-16-0683 Page2 cc:
Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Best, Executive Vice President & Chief Nuclear Officer Mr. C. R. Pierce, Director-Regulatory Affairs Mr. M. D. Meier, Vice President-Regulatory Affairs Mr. D. R. Madison, Vice President-Fleet Operations Mr. B. J. Adams, Vice President-Engineering Ms. B. L. Taylor, Regulatory Affairs Manager-Farley RTYPE: CFA04.054 U. S. Nuclear Requlatorv Commission Ms. C. Haney, Regional Administrator Mr. S. A. Williams, NRR Project Manager - Farley Mr. P. K. Niebaum, Senior Resident Inspector-Farley
Enclosure to NL-16-0683 Joseph M. Farley Nuclear Plant-Unit 2 Special Report No. 2016-002-00. Alternate AC Source Out of Service This Special Report is being submitted as required by Technical Specifications (TS) 5.6.11 due to the 2C Diesel Generator (DG), the Alternate AC Source (AAC Source) for Plant Farley, being out of service for greater than 10 days.
At 0848 on April 21, 2016, with Unit 2 defueled during refueling outage 2R24, the 2C DG was declared non-functional due to discovering failed relays in the circuitry of the B2J Sequencer. Troubleshooting activities and delays in obtaining replacement parts led to the 2C DG being out of service for Unit 2 for greater than 10 days, which requires NRC notification per TS 5.6.11. Following completion of maintenance activities and functional testing of the sequencer, the 2C DG was returned to service at 1339 on May 2, 2016, for a total out of service time of 11.2 days.
There were two time intervals during this period when the diesel was available to perform Its AAC Source function. One of these was for approximately 10.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> on April 26-27, 2016, and another was on May 1, 2016 for approximately 2.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. These intervals of availability were not realized until after the failure mode was better understood following troubleshooting, testing, and restoration of the 2C DG. Therefore, the 2C DG was treated as non-functional for the duration of the out of service period.
Cheryl A. Gayheart V1ce Pres1dent - Farley June 2, 2016 Docket Nos.: 50-364 Southern Nuclear Operating Company, Inc.
Farley Nuclear Plan!
Post Olf1ce Drawer 470 Ashford, AL 36312 Tei334.B14.4511 Fax 334 814 4575 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 SOUTHERN <<\\
NUCLEAR A SOUTHERN COMPANY NL-16-0683 Joseph M. Farley Nuclear Plant - Unit 2 Special Report No. 2016-002-00. Alternate AC Source Out of Service Ladies and Gentlemen:
In accordance with Section 5.6.11 of the Joseph M. Farley Nuclear Plant (FNP) Units 1 and 2 Technical Specifications, Southern Nuclear Operating Company (SNC) hereby submits the enclosed Special Report No. 2016-002-00 for Unit 2.
This letter contains no NRC commitments. If you have any questions, please contact Ms. Julie Collier at (334) 814-4639.
Sincerely, CAG/JAC
Enclosure:
Special Report No. 2016-002-00, Alternate AC Source Out of Service
U. S. Nuclear Regulatory Commission NL-16-0683 Page2 cc:
Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Best, Executive Vice President & Chief Nuclear Officer Mr. C. R. Pierce, Director-Regulatory Affairs Mr. M. D. Meier, Vice President-Regulatory Affairs Mr. D. R. Madison, Vice President-Fleet Operations Mr. B. J. Adams, Vice President-Engineering Ms. B. L. Taylor, Regulatory Affairs Manager-Farley RTYPE: CFA04.054 U. S. Nuclear Requlatorv Commission Ms. C. Haney, Regional Administrator Mr. S. A. Williams, NRR Project Manager - Farley Mr. P. K. Niebaum, Senior Resident Inspector-Farley
Enclosure to NL-16-0683 Joseph M. Farley Nuclear Plant-Unit 2 Special Report No. 2016-002-00. Alternate AC Source Out of Service This Special Report is being submitted as required by Technical Specifications (TS) 5.6.11 due to the 2C Diesel Generator (DG), the Alternate AC Source (AAC Source) for Plant Farley, being out of service for greater than 10 days.
At 0848 on April 21, 2016, with Unit 2 defueled during refueling outage 2R24, the 2C DG was declared non-functional due to discovering failed relays in the circuitry of the B2J Sequencer. Troubleshooting activities and delays in obtaining replacement parts led to the 2C DG being out of service for Unit 2 for greater than 10 days, which requires NRC notification per TS 5.6.11. Following completion of maintenance activities and functional testing of the sequencer, the 2C DG was returned to service at 1339 on May 2, 2016, for a total out of service time of 11.2 days.
There were two time intervals during this period when the diesel was available to perform Its AAC Source function. One of these was for approximately 10.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> on April 26-27, 2016, and another was on May 1, 2016 for approximately 2.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. These intervals of availability were not realized until after the failure mode was better understood following troubleshooting, testing, and restoration of the 2C DG. Therefore, the 2C DG was treated as non-functional for the duration of the out of service period.