ND-17-2139, Vogtie Electric Generating Plant Unit 3 - ITAAC Closure Notification on Completion of ITAAC C.2.6.12.05 (Index Number 675)

Vogtie Electric Generating Plant Unit 3 - ITAAC Closure Notification on Completion of ITAAC C.2.6.12.05 (Index Number 675)

ML17363A288
Person / Time
Site:	Vogtle
Issue date:	12/29/2017
From:	Yox M Southern Nuclear Operating Co
To:	Document Control Desk, Office of New Reactors
References
ITAAC C.2.6.12.05, ND-17-2139
Download: ML17363A288 (6)

Text

Michael J. Yox 7825 River Road A South ern Nuclear Regulatory Affairs Director Vogtie 3 & 4 Waynesboro, GA 30830 706-848-6459 tei 410-474-8587 ceii myox@soutfiernco.com DEC 2 9 2017 Docket No.;52-025 ND-17-2139 10CFR 52.99(c)(1)

U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001 Southern Nuclear Operating Company Vogtie Electric Generating Plant Unit 3 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 Vogtie Electric Generating Plant (VEGP)

Unit 3 and 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 G. Petrak at 706-848-1575.

Respectfully submitted.

Michael J. Yox Regulatory Affairs/Director Vogtie 3 & 4

Enclosure:

Vogtie Electric Generating Plant (VEGP) Unit 3 Completion of ITAAC C.2.6.12.05 [Index Number 675]

MJY/RAS/amw

U.S. Nuclear Regulatory Commission ND-17-2139 Page 2 of 3 To:

Southern Nii clear Operating Company/ Georgia Power Company Mr. D. A. Bost (w/o enclosures)

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

Mr. M. D. Me er Mr. D. H. Jones (w/o enclosures)

Mr. D. L. MchJnney Mr. M. J. Yox Mr. D. L. Fulton Mr. J. D. Williams Mr. F. H. Will s Ms. A. L. Puclh Mr. A. 8. Parton Mr. W. A. Sparkman Mr. 0. E. Morrow Ms. K. M. Stacy Mr. M. K. Walshington Mr. J. P. Red Ms. A. C. Chkmberlain Mr. D. R. Cu ver Mr. R. L. Bel ke Mr. T. G. Pelrak Document S<5rvices RTYPE: VND.L1.L06 File AR.01.02.06 cc:

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

Ms. J. M. He)sserer Mr. 0. P. Palel Mr. M. E. Ernstes Mr. G. J. Khouri Mr. T. E. Chandler Ms. S. E.Te nple Ms. P. Braxti Dn Mr. T. C. Brimfield Mr. A. J. Leroh Mr. 0. J. Even Mr. F. D. Brown Mr. B. J. Kernker Ms. A. E. Riyera-Varona Qqiethorpe Power Corporation Mr. K. T. Hayines Mr. R. B. Br ihkman Municipal Electric Authority of Georgia Mr. J. E. Ful er Mr. S. M. Ja ckson

U.S. Nuclear Iflegulatory Commission ND-17-2139 Page 3 of 3 Dalton Utilities Mr. T. Bundros Westinahouse Electric Company. LLC Dr. L. Oriani (w/o enclosures)

Mr. D. 0. Du rlliam (w/o enclosures)

Mr. M. M. Cor etti Ms. L. G. Iller Mr. D. Hawkir s Ms. 8. DiTom (naso Mr. J. L. Cow^ rd Ms. N. E. De.dngelis Other Mr. J. E. Heslle r, Bechtel Power Corporation Ms. L. Matis, Tetra Tech NUS, Inc.

Dr. W. R. Jacblbs, Jr., Ph.D., GDS Associates, Inc.

Mr. 8. Roetge r,, Georgia Public Sen/ice Commission Ms. 8. W. Kennizan, Georgia Public Service Commission Mr. K. C. Greeine, Troutman Sanders Mr. 8. Blanton Balch Bingham

U.S. Nuclear Iflegulatory Commission ND-17-2139 Binclosure Page 1 of 3 Southern Nuclear Operating Company ND-17-2139 Enclosure Vogtle Electric Generating Plant (VEGP) Unit 3 Completion of ITAAC C.2.6.12.05 [Index Number 675]

U.S. Nuclear Regulatory Commission ND-17-2139E nclosure Page 2 of 3 ITAAC StateiTient Design Comm itment:

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

Inspections. T(?sts. Analyses:

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 Ciiteria:

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

The design of he as-built offsite circuits was reviewed and the fault current contribution of each offsite circuit w as analyzed for short-circuits under two operational scenarios of the offsite power system. The friSt scenario was based on Vogtle Units 1,2, and 3 in normal operation, which is the configuratibin that will exist once Vogtle Unit 3 is completed and prior to completion of Unit 4.

The second sqenario was based on Vogtle Units 1, 2, 3, and 4 in normal operation, which is the offsite power system configuration that will have the highest potential fault currents once Vogtle Units 3 and 4 ^re completed. The results of the analyses are provided in the report, 0.2.6.12.05--U3 PCD-Rev 0-01, "Vogtle 3&4 Offsite Power - Maximum Available Fault Currents" (Reference 1)

The design of he 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 ciffsite circuit. The results of the design review are summarized in the report, PCD Summary Repp rt C.2.6.12.05-U3-SumRep-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 impedatvce. The equipment rating requirements identified in those analyses were incorporated ir) the design specifications issued for procurement of the equipment.

The fault capa Dilities of the onsite AC power system are conservatively designed for fault currents greatrjir than the maximum expected fault currents of the offsite power system. The short-circuit cc ntribution of each as-built offsite circuit at the interface with the onsite AC power system is com patible with the interrupting capability of the onsite fault current interrupting devices.

U.S. Nuclear Regulatory Commission ND-17-2139E nclosure 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 3 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 ^/ogtle Unit 3 and that the prescribed acceptance criteria are met. Systems, structures, anc components verified as part of this ITAAC are being maintained in their as-designed, ITA^'C compliant condition in accordance with approved plant programs and procedures.

References (a vailable for NRC inspection)

1. C.2.6.12.0^-U3-PCD-Rev 0-01, "Vogtle 3&4 Offsite Power - Maximum Available Fault Currents"

2. C.2.6.12.0^-U3-SumRep-Rev 0, "Review of As-Designed Short-Circuit Capabilities of Onsite AC Power System"

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