ND-23-0423, ITAAC Closure Notification on Completion of ITAAC Item 3.3.00.05b (Index Number 785)

ITAAC Closure Notification on Completion of ITAAC Item 3.3.00.05b (Index Number 785)

ML23156A295
Person / Time
Site:	Vogtle
Issue date:	06/05/2023
From:	Coleman J Southern Nuclear Operating Co
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
ND-23-0423, ITAAC 3.3.00.05b
Download: ML23156A295 (1)

Text

Jamie M. Coleman 7825 River Road Regulatory Affairs Director Waynesboro, GA 30830 Vogtle 3 & 4 706-848-6926 tel June 5, 2023 Docket No.: 52-026 ND-23-0423 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 Item 3.3.00.05b [Index Number 785]

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 3.3.00.05b [Index Number 785]. An inspection of the boundaries between the rooms identified in VEGP Unit 4 Combined License (COL) Appendix C Table 3.3-2 was performed to demonstrate that the boundaries between these rooms were designed and constructed to prevent flooding of rooms that contain safety-related equipment. 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 Kelli Roberts at 706-848-6991.

Respectfully submitted, Jamie M. Coleman Regulatory Affairs Director Vogtle 3 & 4

Enclosure:

Vogtle Electric Generating Plant (VEGP) Unit 4 Completion of ITAAC 3.3.00.05b [Index Number 785]

JMC/LH/sfr

U.S. Nuclear Regulatory Commission ND-23-0423 Page 2 of 2 cc: Regional Administrator, Region ll Director, Office of Nuclear Reactor Regulation (NRR)

Director, Vogtle Project Office NRR Senior Resident Inspector - Vogtle 3 & 4

U.S. Nuclear Regulatory Commission ND-23-0423 Enclosure Page 1 of 4 Southern Nuclear Operating Company ND-23-0423 Enclosure Vogtle Electric Generating Plant (VEGP) Unit 4 Completion of ITAAC Item 3.3.00.05b [Index Number 785]

U.S. Nuclear Regulatory Commission ND-23-0423 Enclosure Page 2 of 4 ITAAC Statement Design Commitment 5.b) The boundaries between rooms identified in Table 3.3-2 of the auxiliary building are designed to prevent flooding of rooms that contain safety-related equipment.

Inspections/Tests/Analyses An inspection of the auxiliary building rooms will be performed.

Acceptance Criteria A report exists that confirms floors and walls as identified on Table 3.3-2 have provisions to prevent flooding between rooms up to the maximum flood levels for each room defined in Table 3.3-2.

ITAAC Determination Basis An inspection of the boundaries between the rooms identified in Vogtle Electric Generating Plant (VEGP) Unit 4 Combined License (COL) Appendix C Table 3.3-2 (Attachment A), was performed to demonstrate that the boundaries between these rooms are designed and were constructed to prevent flooding of rooms that contain safety-related equipment.

Inspections were performed of auxiliary building rooms to demonstrate that floors and walls as identified in Table 3.3-2 have provisions to prevent flooding between rooms up to the maximum flood levels for each room defined in COL Appendix C Table 3.3-2 (Attachment A). An inspection plan was prepared to identify all openings and penetrations on the floors and walls up to the maximum flood levels of the rooms. Each as-built opening or penetration was observed and measured to confirm being below the corresponding maximum flood level and was inspected to ensure that the openings and penetrations were sealed as specified in the design documents. A final walkdown of the floors and walls was performed to ensure that all openings and penetrations were identified and inspected.

The inspection plan and results of the visual inspection of the floors and walls are documented in the Unit 4 Principal Closure Document (PCD) (Reference 1), and confirms floors and walls as identified on COL Appendix C Table 3.3-2 have provisions to prevent flooding between rooms up to the maximum flood levels for each room defined in the COL Appendix C Table 3.3-2 (Attachment A).

Reference 1 is available for NRC inspection as part of the Unit 4 ITAAC 3.3.00.05b Completion Package (Reference 2).

U.S. Nuclear Regulatory Commission ND-23-0423 Enclosure Page 3 of 4 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 3.3.00.05b (Reference 2) and is available for NRC review.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 3.3.00.05b 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. SV4-1000-ITR-800785, Rev. 0, Unit 4 Inspections of Aux Bldg. Safety-Related Equipment Rooms Flood Prevention: ITAAC 3.3.00.05b, NRC Index Number: 785

2. 3.3.00.05b-U4-CP-Rev0, ITAAC Completion Package

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

U.S. Nuclear Regulatory Commission ND-23-0423 Enclosure Page 4 of 4 Attachment A COL Appendix C Table 3.3-2 Table 3.3-2 Nuclear Island Building Room Boundaries Required to Have Flood Barrier Floors and Walls Between Room Number to Room Number Boundary/ Room with Postulated Maximum Flood Level (inches) Flooding Source Adjacent Room Floor/36 12306 12211 Floor/3 12303 12203/12207 Floor/3 12313 12203/12207 Floor/1 12300 12201/12202/12207 12203/12204/12205 Floor/3 12312 12212 Wall/36 12306 12305 Floor/1 12401 12301/12302/12303 12312/12313 Wall/1 12401 12411/12412 Floor/36 12404 12304 Floor/4 12405 12305 Floor/36 12406 12306 Wall/36 12404 12421 Wall/30 12452 12421 Floor/3 12501 12401/12411/12412 Floor/3 12555 12421/12423/12422 Wall/168 12156 12111/12112 Wall/76.5 12158 12111 Wall/132 12258 12211/12212