ND-19-1027, ITAAC Closure Notification on Completion of ITAAC C.2.6.12.05 (Index Number 675)

ITAAC Closure Notification on Completion of ITAAC C.2.6.12.05 (Index Number 675)

ML19242D436
Person / Time
Site:	Vogtle
Issue date:	08/30/2019
From:	Yox M Southern Nuclear Operating Co
To:	Document Control Desk, Office of New Reactors
References
ITAAC C.2.6.12.05, ND-19-1027
Download: ML19242D436 (6)

Text

Michael J. Yox 7825 River Road Southern Nuclear Regulatory Affairs Director Waynesboro, GA 30830 Vogtle 3 & 4 706-848-6459 tel AUG 3 0 2019 Docket No.: 52-026 ND-19-1027 10 CFR 52.99(c)(1)

U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001 Southern Nuclear Operating Company Vogtle Electric Generating Plant Unit 4 ITAAC Closure Notification on Completion of ITAAC C.2.6.12.05 (Index Number 6751 Ladies and Gentlemen:

In accordance with 10 CFR 52.99(c)(1), the purpose of this letter is to notify the Nuclear Regulatory Commission (NRC)of the completion of Vogtle Electric Generating Plant(VEGP)

Unit 4 Inspections, Tests, Analyses, and Acceptance Criteria (ITAAC) Item C.2.6.12.05 [Index Number 675]for verifying the short circuit contribution of each as-built offsite circuit at the interface with the onsite ac power system is compatible with the interrupting capability of the onsite fault current interrupting devices. The closure process for this ITAAC is based on the guidance described in Nuclear Energy Institute (NEI)08-01, "Industry Guideline for the ITAAC Closure Process under 10 CFR Part 52," which was endorsed by the NRC in Regulatory Guide 1.215.

This letter contains no new NRC regulatory commitments. Southern Nuclear Operating Company(SNC) requests NRC staff confirmation of this determination and publication of the required notice in the Federal Register per 10 CFR 52.99.

If there are any questions, please contact Tom Petrak at 706-848-1575.

Respectfully submitted, Michael J. Yox Regulatory Affairs Director Vogtle 3 & 4

Enclosure:

Vogtle Electric Generating Plant(VEGP) Unit 4 Completion of ITAAC C.2.6.12.05 [Index Number 675]

MJY/DJG/sfr

U.S. Nuclear Regulatory Commission ND-19-1027 Page 2 of 3 To:

Southern Nuclear Operating Company/ Georgia Power Company Mr. Peter P. Sena III (w/o enclosures)

Mr. D. L. McKlnney(w/o enclosures)

Mr. M. D. Meier(w/o enclosures)

Mr. D. H. Jones(w/o enclosures)

Mr. G. Chick Mr. M. J. Yox Mr. A. S. Parton Ms. K. A. Roberts Mr. T. G. Petrak Mr. C. T. Defnall Mr. C. E. Morrow Mr. J. L. Hughes Ms. K. M. Stacy Ms. A. C. Chamberlain Mr. J. C. Haswell Document Services RTYPE; VND.LI.L06 File AR.01.02.06 cc:

Nuclear Reaulatorv Commission Mr. W.Jones(w/o enclosures)

Mr. F. D. Brown Mr. C. P. Patel Mr. G. J. Khouri Ms. S. E. Temple Mr. N. D. Karlovlch Mr. A. Lerch Mr. C. J. Even Mr. 8. J. Kemker Ms. N. C. Coovert Mr. C. Welch Mr. J. Gaslevic Mr. V. Hall Mr. G. Armstrong Ms. T. Lamb Mr. M. Webb Mr. T. Fredette Mr. C. Weber Oalethorpe Power Corporation Mr. R. B. Brinkman Mr. E. Rasmussen

U.S. Nuclear Regulatory Commission ND-19-1027 Page 3 of 3 Municipal Electric Authority of Georgia Mr. J. E. Fuller Mr. 8. M. Jackson Daiton Utilities Mr. T. Bundros Westinahouse Electric ComDanv. LLC Dr. L. Oriani(w/o enclosures)

Mr. D. 0. Durham (w/o enclosures)

Mr. M. M. Corletti Ms. L. G. Iller Mr. Z. 8. Harper Mr. J. L. Coward Other Mr. J. E. Hosier, Bechtel Power Corporation Ms. L. Matis, Tetra Tech NUS, Inc.

Dr. W. R. Jacobs, Jr., Ph.D., CDS Associates, Inc.

Mr. 8. Roetger, Georgia Public Service Commission Ms. 8. W. Kernlzan, Georgia Public Service Commission Mr. K. C. Greene, Troutman Sanders Mr. 8. Blanton, Balch BIngham

U.S. Nuclear Regulatory Commission ND-19-1027 Enclosure Page 1 of 3 Southern Nuclear Operating Company ND-19-1027 Enclosure Vogtle Electric Generating Plant(VEGP)Unit 4 Completion of ITAAC C.2.6.12.05[Index Number 675]

U.S. Nuclear Regulatory Commission ND-19-1027 Enclosure Page 2 of 3 ITAAC Statement Desion Commitment:

5. The fault current contribution of each offsite circuit is compatible with the interrupting capability of the onsite short circuit interrupting devices.

Inspections. Tests. Analvses:

Analyses of the as-built offsite circuit will be performed to evaluate the fault current contribution of each offsite circuit at the interface with the onsite ac power system.

Acceptance Criteria:

A report exists and concludes the short circuit contribution of each as-built offsite circuit at the interface with the onsite ac power system is compatible with the interrupting capability of the onsite fault current interrupting devices.

ITAAC Determination Basis Analyses of the as-built offsite power system were performed to verify the fault current contribution of each as-built offsite circuit is compatible with the interrupting capability of the onsite short circuit interrupting devices.

The design of the as-built offsite circuits was reviewed and the fault current contribution of each offsite circuit was analyzed for short-circuits of the offsite power system based on Vogtle Units 1, 2, 3, and 4 in normal operation. The results of the analyses are provided in the report, 0.2.6.12.05-U4-PCD-Rev 0,"Vogtle 3&4 Offsite Power - Maximum Available Fault Currents" (Reference 1).

The design of the onsite alternating current(AC) power system was reviewed to determine that the capabilities of the interrupting devices are compatible with the short circuit contribution of each as-built offsite circuit. The results of the design review are summarized in the report, PCD Summary Report C.2.6.12.05-U4-8umRep-Rev 0,"Review of As-Designed Short-Circuit Capabilities of Onsite AC Power System"(Reference 2). The report concludes the analyses that determined the equipment ratings were performed with a conservative equivalent short-circuit impedance. The equipment rating requirements identified in those analyses were incorporated in the design specifications issued for procurement of the equipment.

The fault capabilities of the onsite AC power system are conservatively designed for fault currents greater than the maximum expected fault currents of the offsite power system. The short-circuit contribution of each as-built offsite circuit at the interface with the onsite AC power system is compatible with the interrupting capability of the onsite fault current interrupting devices.

U.S. Nuclear Regulatory Commission ND-19-1027 Enclosure Page 3 of 3 ITAAC Finding Review In accordance with plant procedures for ITAAC completion, Southern Nuclear Operating Company(SNC) performed a review of all ITAAC findings pertaining to the subject ITAAC and associated corrective actions. This review found that there are no relevant ITAAC findings associated with this ITAAC. The ITAAC completion review document number is included in the Vogtle Unit 4 ITAAC Completion Package for ITAAC C.2.6.12.05(Reference 3)and available for NRC inspection.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC C.2.6.12.05 was performed for Vogtle Unit 4 and that the prescribed acceptance criteria are met. Systems, structures, and components verified as part of this ITAAC are being maintained in their as-designed, ITAAC compliant condition in accordance with approved plant programs and procedures.

References(available for NRC inspection)

1. C.2.6.12.05-U4-PCD-Rev 0,"Vogtle 3&4 Offsite Power - Maximum Available Fault Currents"

2. C.2.6.12.05-U4-SumRep-Rev 0,"Review of As-Designed Short-Circuit Capabilities of Onsite AC Power System"

3. Vogtle Unit 4 ITAAC Completion Package for ITAAC C.2.6.12.05