ND-22-0568, ITAAC Closure Notification on Completion of ITAAC 2.3.04.04.i (Index Number 330)

ITAAC Closure Notification on Completion of ITAAC 2.3.04.04.i (Index Number 330)

ML22230D071
Person / Time
Site:	Vogtle
Issue date:	08/18/2022
From:	Coleman J Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ITAAC 2.3.04.04.i, ND-22-0568
Download: ML22230D071 (7)

Text

Jamie M. Coleman 7825 River Road 3/4e: Southern Nuclear Regulatory Affairs Director Vogtle 3 &4 Waynesboro, GA 30830 706-848-6926 tel August 18,2022 Docket No.: 52-026 ND-22-0568 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 2.3.04.04.i [Index Number 330]

Ladies and Gentlemen :

In accordance with 10 CFR 52.99(c)(1 ), the purpose of this letter is to notify the Nuclear Regulatory Commission (NRG) of the completion of Vogtle Electric Generating Plant (VEGP) Unit 4 Inspections, Tests , Analyses, and Acceptance Criteria (ITAAC) Item 2.3.04.04.i [Index Number 330]. This ITAAC verified the as-built volume of the Passive Containment Cooling System (PCS)

Water Storage Tank feeding the Fire Protection System (FPS), the number and elevation of the FPS spray headers and nozzles, and the volume of water of each fire water storage tank dedicated to FPS meets the Unit 4 COL Appendix C acceptance criteria. The closure process for this ITAAC is based on the guidance described in NEI 08-01, "Industry Guideline for the ITAAC Closure Process under 10 CFR Part 52," which was endorsed by the NRG in Regulatory Guide 1.215.

This letter contains no new NRG regulatory commitments. Southern Nuclear Operating Company (SNC) requests NRG 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 Roberts at 706-848-6991 .

Respectfully submitted ,

OJ'NJQ~

~ e M. Coleman Regulatory Affairs Director Vogtle 3 & 4

Enclosure:

Vogtle Electric Generating Plant (VEGP) Unit 4 Completion of ITAAC 2.3.04.04.i [Index Number 330]

JMC/JTK/sfr

U.S. Nuclear Regulatory Commission ND-22-0568 Page 2 of 3 To:

Southern Nuclear Operating Company/ Georgia Power Company Mr. Peter P. Sena Ill Mr. D. L. McKinney Mr. H. Nieh Mr. G. Chick Mr. S. Stimac Mr. P. Martino Mr. D. Pitts Mr. J.B. Williams Mr. A. S. Parton Ms. K. A. Roberts Ms. J.M. Coleman Mr. C. T. Defnall Mr. C. E. Morrow Mr. K. J. Drudy Mr. J. M. Fisher Mr. R. L. Beilke Mr. S. Leighty Ms. A. C. Chamberlain Mr. J.C. Haswell Document Services RTYPE: VND.LI.L06 File AR.01 .02.06 Nuclear Regulatory Commission Mr. M. King Mr. G. Bowman Ms. A. Veil Mr. G. J. Khouri Mr. C. J. Even Mr. B. J. Kemker Ms. N. C. Coovert Mr. C. Welch Mr. J. Gaslevic Mr. 0 . Lopez-Santiago Mr. G. Armstrong Mr. M. Webb Mr. T. Fredette Mr. C. Santos Mr. B. Davis Mr. J. Vasquez Mr. J. Eargle Ms. K. Mccurry Mr. J. Parent Mr. B. Griman Mr. V. Hall

U.S. Nuclear Regulatory Commission ND-22-0568 Page 3 of 3 Oglethorpe Power Corporation Mr. R. 8. Brinkman Mr. E. Rasmussen Municipal Electric Authority of Georgia Mr. J. E. Fuller Mr. S. M. Jackson Dalton Utilities Mr. T. Bundros Westinghouse Electric Company, LLC Dr. L. Oriani Mr. D. C. Durham Mr. M. M. Corletti Mr. Z. S. Harper Ms. S.L. Zwack Other Mr. S. W. Kline, Bechtel Power Corporation Ms. L. Matis, Tetra Tech NUS, Inc.

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

Mr. S. Roetger, Georgia Public Service Commission Mr. R. L. Trokey, Georgia Public Service Commission Mr. K. C. Greene, Troutman Sanders Mr. S. Blanton, Balch Bingham

U.S. Nuclear Regulatory Commission ND-22-0568 Enclosure Page 1 of 4 Southern Nuclear Operating Company ND-22-0568 Enclosure Vogtle Electric Generating Plant (VEGP) Unit 4 Completion of ITAAC 2.3.04.04.i [Index Number 330]

U.S. Nuclear Regulatory Commission ND-22-0568 Enclosure Page 2 of 4 ITAAC Statement Design Commitment

4. The FPS provides for manual fire fighting capability in plant areas containing safety-related equipment.

6. The FPS provides nonsafety-related containment spray for severe accident management.

7. The FPS provides two fire water storage tanks, each capable of holding at least 100 percent of the water supply necessary for FPS use.

Inspections, Tests, Analysis i) Inspection of the passive containment cooling system (PCS) storage tank will be performed.

Inspection of the containment spray headers will be performed.

Inspection of each fire water storage tank will be performed.

Acceptance Criteria i) The volume of the PCS tank above the standpipe feeding the FPS and below the overflow is at least 18,000 gal.

The FPS has spray headers and nozzles as follows:

At least 44 nozzles at plant elevation of at least 260 feet, and 24 nozzles at plant elevation of at least 275 feet.

The volume of water dedicated to FPS use provided in each fire water storage tank is at least 396,000 gallons.

ITAAC Determination Basis Multiple ITAAC were performed to demonstrate that the Fire Protection System (FPS) provides for manual fire fighting capability in plant areas containing safety-related equipment, the FPS provides non safety-related containment spray for severe accident management, and the FPS provides two fire water storage tanks, each capable of holding at least 100 percent of the water supply necessary for FPS use. This ITAAC requires inspections to be performed of the Passive Containment Cooling System (PCS) storage tank, the containment spray headers, and each fire water storage tank.

i) The volume of the PCS tank above the standpipe feeding the FPS and below the overflow is at least 18,000 gal.

Inspections of the Passive Containment Cooling Water Storage Tank (PCCWST) and line elevation measurements for the standpipe feeding the FPS and the PCCWST overflow standpipe were performed to demonstrate that the volume of the PCCWST above the standpipe

U.S. Nuclear Regulatory Commission ND-22-0568 Enclosure Page 3 of 4 feeding the FPS and below the overflow is at least 18,000 gallons. The PCCWST usable volume above the standpipe feeding the FPS and below the PCCWST overflow standpipe was calculated, using the PCCWST dimensions and line elevation measurements, and compared to the ITAAC acceptance criteria of at least 18,000 gallons.

The inspection results of the PCS storage tank volume above the standpipe feeding the FPS and below the PCCWST overflow and the calculated volume are documented in the Vogtle Unit 4 ITAAC Passive Containment Cooling System (PCS) Storage Tank Volume report (Reference 1). The volume of the PCS storage tank (Tag No. PCS-MT-01) above the standpipe feeding the FPS and below the overflow is 22,936 gallons. This confirms that the volume of the PCS storage tank above the standpipe feeding the FPS and below the overflow is at least 18,000 gallons, in accordance with the ITAAC acceptance criteria.

The FPS has spray headers and nozzles as follows:

At least 44 nozzles at plant elevation of at least 260 feet, and 24 nozzles at plant elevation of at least 275 feet.

Inspections of the containment spray headers in the Fire Protection System (FPS) were performed and demonstrated that the FPS provides non safety-related containment spray for severe accident management. The inspections were performed to determine the number and elevation of the containment spray nozzles. The number of containment spray nozzles was determined by counting the number of spray nozzles at each of the two (upper and lower) ring headers located above the containment polar crane.

The number and elevation of the FPS containment spray headers and nozzles were compared to the ITAAC acceptance criteria. The results of the comparison were documented in Vogtle Unit 4 FPS Spray Headers and Nozzles Location Inspection report (Reference 2). The results verified that the FPS has 44 containment spray nozzles at plant elevation of at least 260 feet, and 24 containment spray nozzles at plant elevation of at least 275 feet, in accordance with the ITAAC acceptance criteria.

The volume of water dedicated to FPS use provided in each fire water storage tank is at least 396,000 gallons.

Inspections were performed to verify that the Fire Protection System (FPS) provides two fire water storage tanks, each capable of holding at least 396,000 gallons of water, per the VEGP 3&4 Updated Final Safety Analysis Report, Table 9.5.1-2, Component Data - Fire Protection System (Nominal Values). The FPS tanks are identified as the Primary Fire Water Tank (FPS-MT-01A) and the Secondary Fire Water Tank (FPS-MT-01 B). Measurements and calculations for these fire water storage tanks were conducted to verify that the dedicated volume of each tank to the FPS is at least 396,000 gallons.

The volume of the Primary Fire Water Tank and the Secondary Fire Water Tank were determined by the following method.

The dimensions of each fire water storage tank were measured and recorded following tank construction by the tank manufacturer. Each tank's as-built volume was calculated using the vendor measurements and compared to the minimum volume acceptance criteria of 396,000 gallons per fire water storage tank.

U.S. Nuclear Regulatory Commission ND-22-0568 Enclosure Page 4 of 4 The results of the Primary Fire Water Tank and the Secondary Fire Water Tank volume determinations are documented in the ITAAC Verification Volume of Fire Water Storage Tanks SV4-FPS-MT-01A SV4-FPS-MT-01 B report (Reference 3). The calculated dedicated volume of the Primary Fire Water Tank is 396,436 gallons and the Secondary Fire Water Tank is 396,436 gallons. This confirms that the dedicated volume of each fire water storage tank supplying the FPS is at least 396,000 gallons, in accordance with the ITAAC acceptance criteria.

Measurements taken to meet the ITAAC acceptance criteria were taken using survey equipment in accordance with the Bechtel Construction Survey procedure (Reference 4 ), as applicable.

The inspection results are documented in References 1, 2 and 3, and are available for NRC inspection as part of the ITAAC 2.3.04.04.i Completion Package (Reference 5).

ITAAC Finding Review In accordance with plant procedures for ITAAC completion, Southern Nuclear Operating Company (SNC) performed a review of all lTAAC 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 is documented in the ITAAC Completion Package for ITAAC 2.3.04.04.i (Reference 5) and is available for NRC review.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 2.3.04.04.i was performed for VEGP Unit 4 and that the prescribed acceptance criteria were 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. SV4-CB20-FSK-800330, Rev. 0, "Vogtle Unit 4 ITAAC Passive Containment Cooling System (PCS) Storage Tank Volume" .

2. SV4-FPS-ITR-800330, Rev 0, "Unit 4 FPS Spray Headers and Nozzles Location Inspection"

3. SV4-FPS-MTK-800330, Rev. 0, "ITAAC Verification Volume of Fire Water Storage Tanks SV4-FPS-MT-01A SV4-FPS-MT-01 B".

4. 26139-000-4MP-T81 C-N3201, Rev. 5, "Bechtel Construction Survey"

5. ITAAC 2.3.04.04.i-U4-CP-Rev0, ITAAC Completion Package.