ND-23-0153, ITAAC Closure Notification on Completion of ITAAC 2.3.09.02a (Index Number 421)

ITAAC Closure Notification on Completion of ITAAC 2.3.09.02a (Index Number 421)

ML23047A419
Person / Time
Site:	Vogtle
Issue date:	02/16/2023
From:	Coleman J Southern Nuclear Operating Co
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
ND-23-0153, ITAAC 2.3.09.02a
Download: ML23047A419 (1)

Text

Jamie M. Coleman 7825 River Road Regulatory Affairs Director Waynesboro, GA 30830 Vogtle 3 & 4 706-848-6926 tel February 16, 2023 Docket No.: 52-026 ND-23-0153 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 2.3.09.02a [Index Number 421]

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 2.3.09.02a [Index Number 421]. This ITAAC confirms that the hydrogen monitors identified in Table 2.3.9-1 are powered by the non-Class 1E dc and UPS System.

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 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 2.3.09.02a [Index Number 421]

JMC/CSS/sfr

U.S. Nuclear Regulatory Commission ND-23-0153 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-23-0153 Enclosure Page 1 of 4 Southern Nuclear Operating Company ND-23-0153 Enclosure Vogtle Electric Generating Plant (VEGP) Unit 4 Completion of ITAAC 2.3.09.02a [Index Number 421]

U.S. Nuclear Regulatory Commission ND-23-0153 Enclosure Page 2 of 4 ITAAC Statement Design Commitment 2.a) The hydrogen monitors identified in Table 2.3.9-1 are powered by the non-Class 1E dc and UPS system.

Inspections, Tests, Analyses Testing will be performed by providing a simulated test signal in each power group of the non-Class 1E dc and UPS system.

Acceptance Criteria A simulated test signal exists at the hydrogen monitors identified in Table 2.3.9-1 when the non-Class 1E dc and UPS system is provided the test signal.

ITAAC Determination Basis Testing is performed on the hydrogen monitors identified in the VEGP Unit 4 COL Appendix C Table 2.3.9-1 (Attachment A) to demonstrate they are powered from the non-Class 1E dc and Uninterruptible Power Supply (UPS) system (EDS). This ITAAC performs testing on the hydrogen monitors identified in Attachment A by providing a simulated test signal in the EDS supplying power to the hydrogen monitors.

The Unit 4 Construction Work Packages identified in Reference 1 document completion of power verification activities from the EDS uninterruptible power supply (UPS) distribution panel to the hydrogen monitors identified in Attachment A. Reference 1 first verifies that power supply cables/wiring are installed and terminated from the applicable EDS UPS power distribution panels to the hydrogen monitors identified in Attachment A using approved construction drawings and cable/wiring termination documentation. Reference 1 then confirms, via cable/wiring termination inspection documentation, that continuity testing was performed on each of the installed cables/wiring to confirm current flow within the installed cable/wiring. The combination of cable/wiring installation and termination verification, with the installed cable/wiring continuity testing, confirms that the hydrogen monitors identified in Attachment A are powered by their respective EDS power supply.

The Unit 4 Construction Work Packages documented in Reference 1 confirm that a simulated test signal exists at the hydrogen monitors identified in Table 2.3.9-1 when the EDS is provided the test signal.

Reference 1 is available for NRC inspection, as well as the Unit 4 ITAAC 2.3.09.02a Completion Package (Reference 2).

U.S. Nuclear Regulatory Commission ND-23-0153 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.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 2.3.09.02a 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-VLS-ITR-800421 Rev0 Unit 4 Containment Hydrogen Control System (VLS) Hydrogen Monitors Signaled from each Power Group

2. 2.3.09.02a-U4-CP-Rev0, ITAAC Completion Package

U.S. Nuclear Regulatory Commission ND-23-0153 Enclosure Page 4 of 4 Attachment A COL Appendix C Table 2.3.9-1 Table 2.3.9-1 Equipment Tag No. Display Containment Hydrogen Monitor VLS-001 Yes Containment Hydrogen Monitor VLS-002 Yes Containment Hydrogen Monitor VLS-003 Yes