ND-20-1324, 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)

ML20350B435
Person / Time
Site:	Vogtle
Issue date:	12/15/2020
From:	Yox M Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ND-20-1324
Download: ML20350B435 (7)

Text

Michael J. Yox 7825 River Road

^Southern Nuclear Regulatory Affairs Director Vogtle 3 & 4 Waynesboro, GA 30830 706-848-6459 tel DEC 1 5 2020 Docket No.: 52-025 ND-20-1324 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 3 ITAAC Closure Notification on Completion of ITAAC 2.3.04.04.i [Index Number 3301 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 3 Inspections, Tests, Analyses, and Acceptance Criteria (ITAAC) Item 2.3.04.04.1 [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 3 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 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

/hJy Regulatory Affairs Director Vogtle 3 & 4

Enclosure:

Vogtle Electric Generating Plant(VEGP) Unit 3 Completion of ITAAC 2.3.04.04.1 [Index Number 330]

MJY/JFV/sfr

U.S. Nuclear Regulatory Commission ND-20-1324 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. G. Chick Mr. S. Stimac Mr. P. Martino 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. 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 Reoulatorv Commission Ms. M. Bailey (w/o enclosures)

Mr. M. King Mr. H. K. Nieh Mr. C. P. Patel Mr. G. J. Khouri Mr. C. J. Even Mr. 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 s. M. Bailey M B. Davis M J. Vasquez M J. Eargle M E. Davidson M T. Fanelli M S. Rose Ms. K. McCurry Qqiethorpe Power Corporation Mr. R. B. Brinkman Mr. E. Rasmussen

U.S. Nuclear Regulatory Commission ND-20-1324 Page 3 of 3 Municipal Electric Authority of Georgia Mr. J. E. Fuller Mr. 8. M. Jackson Dalton Utilities Mr. T. Bundros Westinqhouse Electric Company. LLC Dr. L. OrianI (w/o enclosures)

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

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-20-1324 Enclosure Page 1 of 4 Southern Nuclear Operating Company ND-20-1324 Enclosure Vogtle Electric Generating Plant(VEGP) Unit 3 Completion of ITAAC 2.3.04.04.1 [Index Number 330]

U.S. Nuclear Regulatory Commission ND-20-1324 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. Analvsis 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 nonsafety-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-20-1324 Enclosure Page 3 of 4 feeding the FPS and below the overflow is at least 18,000 gallons. The PCOWST usable volume above the standpipe feeding the FPS and below the PCOWST 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 3 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 34,883 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 sorav 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 nonsafety-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 3 FPS Containment Spray Nozzles Elevations 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-01 A) and the Secondary Fire Water Tank (FPS-MT-01B). 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-20-1324 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 SV3-FPS-MT-01A SV3-FPS-MT-01B report (Reference 3). The calculated dedicated volume of the Primary Fire Water Tank is 396,748 gallons and the Secondary Fire Water Tank is 396,576 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 2.3.04.04.1 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 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 is documented in the ITAAC Completion Package for ITAAC 2.3.04.04.1 (Reference 5) and is available for NRC review.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 2.3.04.04.1 was performed for VEGP Unit 3 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. SV3-CB20-FSK-800330, Rev. 0,"Vogtle Unit 3 ITAAC Passive Containment Cooling System (PCS) Storage Tank Volume".

2. SV3-1100-FSK-800330, Rev. 0,"Vogtle Unit 3 FPS Containment Spray Nozzles Elevations".

3. SV3-FPS-MTK-800330, Rev. 0,"ITAAC Verification Volume of Fire Water Storage Tanks SV3-FPS-MT-01A SV3-FPS-MT-01B".

4. 26139-000-4MP-T81C-N3201, Rev. 5,"Bechtel Construction Survey"

5. ITAAC 2.3.04.04.i-U3-CP-Rev 0, ITAAC Completion Package.

6. NEI 08-01,"Industry Guideline for the ITAAC Closure Process Under 10 CFR Part 52".