ND-21-0332, ITAAC Closure Notification on Completion of ITAAC 2.2.03.08c.iv.03 (Index Number 185)

ITAAC Closure Notification on Completion of ITAAC 2.2.03.08c.iv.03 (Index Number 185)

ML21167A303
Person / Time
Site:	Vogtle
Issue date:	06/16/2021
From:	Yox M Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ND-21-0332
Download: ML21167A303 (6)

Text

^ ,1 l. I I Michael J. Yox 7825 River Road oOUtn0rn NUCl03r Regulatory Affairs Director Waynesboro, GA 30830 Vogtle 3 & 4 706-848-6459 tel Docket Nos.: 52-026

<<<<<<. ND-21-G332 JUN 1 6 2021 10CFR 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 2.2.03.08c.iv.03[Index Number 1851 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 2.2.03.08c.iv.03 [Index Number 185]for verifying that the maximum elevation of the top inside surface of the Core Makeup Tank (CMT)discharge lines to Direct Vessel Injection (DVl) connection is less than the elevation of the CMT bottom inside surface. The closure process for this ITAAC is based on the guidance described in NEl 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 Kelli A. Roberts at 706-848-6991.

Respectfully submitted,

(

Michael J. Yox' Regulatory Affairs Director Vogtle 3 & 4

Enclosure:

Vogtle Electric Generating Plant(VEGP) Unit 4 Completion of ITAAC 2.2.03.08c.iv.03 [Index Number 185]

MJY/RMS/sfr

U.S. Nuclear Regulatory Commission ND-21-0332 Page 2 of 3 To:

Southern Nuclear Operating Company/ Georgia Power Company Mr. Peter P. Sena III Mr. D. L. McKinney Mr. M. D. Meier Mr. G. Chick Mr. S. Stimac Mr. P. Martino Mr. M. J. Yox Mr. A. S. Parton Ms. K. A. Roberts Mr. C. T. Defnall Mr. C. E. Morrow Mr. J. M. Fisher Mr. R. L. Beiike Mr. S. Leighty Ms. A. C. Chamberlain Mr. J. C. Haswell Document Services RTYPE: VND.LI.L06 File AR.01.02.06 cc:

Nuclear Requlatorv Commission Ms. M. Bailey M . M. King M . G. Bowman Ms. A. Veil M . C. P. Patel M . G. J. Khouri M . C. J. Even M B. J. Kemker Ms. N. C. Coovert M . C. Welch M . J. Gaslevic M O. Lopez-Santiago M . G. Armstrong M M. Webb M T. Fredette M C. Santos M B. Davis M . J. Vasquez M . J. Eargle M . E. Davidson M . T. Fanelli Ms. K. McCurry M J. Parent M B. Griman

U.S. Nuclear Regulatory Commission ND-21-0332 Page 3 of 3 Qqlethorpe Power Corporation Mr. R. B. Brinkman Mr. E. Rasmussen Municipal Electric Authority of Georgia Mr. J. E. Fuller Mr. 8. M. Jackson Daiton Utilities Mr. T. Bundros Westinahouse Electric Company. LLC Dr. L. Oriani Mr. D. 0. Durham Mr. M. M. Corletti Mr. Z. 8. Harper Mr. J. L. Coward Other Mr. 8. W. Kline, 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 Mr. R. L. Trokey, Georgia Public Service Commission Mr. K. C. Greene, Troutman Sanders Mr. 8. Blanton, Baich Bingham

U.S. Nuclear Regulatory Commission ND-21-0332 Enclosure Page 1 of 3 Southern Nuclear Operating Company ND-21-0332 Enclosure Vogtle Electric Generating Plant(VEGP) Unit 4 Completion of ITAAC 2.2.03.08c.iv.03[Index No. 185]

U.S. Nuclear Regulatory Commission ND-21-0332 Enclosure Page 2 of 3 ITAAC Statement Design Commitment:

8.c) The PXS provides RCS makeup, boration, and safety injection during design basis events.

Inspections.Tests. Analvses:

iv) Inspections of the elevation of the following pipe lines will be conducted:

3. CMT discharge lines to DVI connection Acceptance Criteria iv) The maximum elevation of the top inside surface of these lines is less than the elevation of:

3. CMT bottom inside surface ITAAC Determination Basis Multiple ITAAC are performed to demonstrate that the Passive Core Cooling System (PXS) provides Reactor Coolant System (RCS) makeup, boration, and safety injection during design basis events. This ITAAC requires that inspections be conducted to verify that the maximum elevation of the top inside surface of the Core Makeup Tank(CMT) discharge lines to Direct Vessel Injection (DVI) connection is less than the elevation of CMT bottom inside surface.

The inspection of the CMT discharge lines to DVI connection top inside surface and the bottom inside tank surface of both CMTs(SV4-PXS-MT-02A and -02B) elevations was performed using survey equipment in accordance with site survey and measurement procedure (Reference 1).

The conservative wall thickness, derived from installed pipe data, was subtracted from the top-of-pipe survey data to obtain the highest elevation of the inside surface of these lines.

Additionally, calculations, based upon as-built manufacturer's data, combined with field measurements, were used to determine the elevation of the bottom inside surface of each CMT.

The maximum derived elevation of the top inside surface of the CMT discharge lines to DVI connection was compared to the derived elevation of the bottom inside surfaces of each associated CMT using a common reference point.

The inspection results documented in Reference 2, verify that the maximum elevation of the CMT A discharge lines to DVI connection top inside surface is 104.83 feet, the maximum elevation of the CMT B discharge lines to DVI connection top inside surface is 104.84 feet, and the elevation of the CMT bottom inside surface is 107.13 feet and 107.09 feet for CMT A and B, respectively, which meets the ITAAC acceptance criteria.

References 1 and 2 are available for NRC inspection as well as the Unit 4 Completion Package (Reference 3).

U.S. Nuclear Regulatory Commission ND-21-0332 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 findings pertaining to the subject ITAAC and associated corrective actions. This review found there are no relevant ITAAC findings associated with this ITAAC. The ITAAC completion review is documented in the ITAAC Completion Package for ITAAC 2.2.03.08c.iv.03(Reference 3)and is available for NRC review.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 2.2.03.08c.iv.03 was performed for VEGP 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. 4MP-T81C-N3201 Rev 1,"Construction Survey"

2. SV4-PXS-FSK-800185 Rev 0,"As-Built CMT Discharge Pipe Elevation Comparison to CMT A & B Bottom Inside Surface Elevation"

3. 2.2.03.08c.iv.03-U4-CP-Rev 0,"Completion Package for the Unit 4 ITAAC 2.2.03.08c.iv.03

[Index Number 185]"