ND-23-0171, ITAAC Closure Notification on Completion of 2.3.09.03.ii (Index Number 424)
| ML23150A221 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 05/30/2023 |
| From: | Coleman J Southern Nuclear Operating Co |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| ND-23-0171 | |
| Download: ML23150A221 (1) | |
Text
Jamie M. Coleman Regulatory Affairs Director Vogtle 3 & 4 7825 River Road Waynesboro, GA 30830 706-848-6926 tel May 30, 2023 Docket No.:
52-026 ND-23-0171 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 2.3.09.03.ii [Index Number 424]
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 2.3.09.03.ii [Index Number 424] to verify that 66 hydrogen igniters are provided at the locations specified, that the surface temperature meets or exceeds 1700°F, that controls in the main control room (MCR) operate to energize the igniters, and that displays identified in the Combined License (COL)
Appendix C Table 2.3.9-1 can be retrieved in the MCR. 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 is 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 2.3.09.03.ii [Index Number 424]
JMC/KIK/sfr
U.S. Nuclear Regulatory Commission ND-23-0171 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-23-0171 Enclosure Page 1 of 10 Southern Nuclear Operating Company ND-23-0171 Enclosure Vogtle Electric Generating Plant (VEGP) Unit 4 Completion of ITAAC 2.3.09.03.ii [Index Number 424]
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 2 of 10 ITAAC Statement Design Commitment
- 3. The VLS provides the nonsafety-related function to control the containment hydrogen concentration for beyond design basis accidents.
4.a) Controls exist in the MCR to cause the components identified in Table 2.3.9-2 to perform the listed function.
- 5. Displays of the parameters identified in Table 2.3.9-1 can be retrieved in the MCR.
Inspections/Tests/Analyses i) Inspection for the number of igniters will be performed.
ii) Operability testing will be performed on the igniters.
Testing will be performed on the igniters using the controls in the MCR.
Inspection will be performed for retrievability of the displays identified in Table 2.3.9-1 in the MCR.
Acceptance Criteria i) At least 66 hydrogen igniters are provided inside containment at the locations specified in Table 2.3.9-2.
ii) The surface temperature of the igniter meets or exceeds 1700°F.
Controls in the MCR operate to energize the igniters.
Displays identified in Table 2.3.9-1 can be retrieved in the MCR.
ITAAC Determination Basis This ITAAC performed testing and inspections to verify that the Containment Hydrogen Control System (VLS) provides the nonsafety-related function to control the containment hydrogen concentration for beyond design basis accidents by ensuring that the required number of hydrogen igniters were installed in the appropriate locations as specified by VEGP Combined License (COL) Appendix C Table 2.3.9-2 (Attachment A) and that the surface temperature of the igniters met or exceeded 1700°F. This ITAAC also verifies that controls exist in the Main Control Room (MCR) to cause the components identified in COL Appendix C Table 2.3.9-2 (Attachment A) to perform the listed function and that displays of the parameters identified in COL Appendix C Table 2.3.9-1 (Attachment B) can be retrieved in the MCR.
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 3 of 10 i) At least 66 hydrogen igniters are provided inside containment at the locations specified in Table 2.3.9-2.
An inspection was performed in accordance with the Unit 4 ITAAC Technical Report SV4-VLS-ITR-800424 (Reference 1) to verify that at least 66 hydrogen igniters are provided inside containment at the locations specified In Attachment A.
The inspection was conducted by reviewing installation records of the hydrogen igniters to verify the correct number of hydrogen igniters were installed and that they were all in their proper locations. The results of the inspection verified that for Unit 4 there are at least 66 hydrogen igniters provided inside containment at the locations specified In Table 2.3.9-2.
ii) The surface temperature of the igniter meets or exceeds 1700°F.
Testing was performed in accordance with Unit 4 preoperational test procedure and work orders listed in Reference 2 to verify that the surface temperature of the igniter meets or exceeds 1700°F.
Testing began by installing appropriate personnel protection barriers and closing the power supply breakers for the hydrogen igniters and control cabinets. Each hydrogen igniter group control was placed to ON and the temperature of each igniter was taken and verified to meet acceptance criteria.
The results of the testing on Unit 4 verifies the surface temperature of each igniter meets or exceeds 1700°F.
Controls in the MCR operate to energize the igniters.
Testing was performed in accordance with Unit 4 preoperational test procedures and work orders listed in Reference 2 to verify that controls in the MCR operate to energize the igniters.
Testing was performed at an operator workstation in Unit 4 MCR and placed the hydrogen igniter controls to ON. All of the igniters listed in Attachment A were verified to energize by measuring the temperature which was performed by item ii) above.
Displays identified in Table 2.3.9-1 can be retrieved in the MCR.
An inspection was performed as documented in Reference 2 for VLS indication verifications, and visually confirmed that when each of the displays of parameters identified in Attachment B was summoned at an MCR workstation, the summoned plant parameter appeared on a display monitor at that MCR workstation.
The completed test and inspection results (References 1 and 2) confirm that at least 66 hydrogen igniters are provided inside containment at the locations specified in Table 2.3.9-2, that the surface temperature of the igniters meets or exceeds 1700°F, that controls in the MCR operate to energize the igniters, and that the displays identified in Table 2.3.9-1 can be retrieved in the MCR.
References 1 and 2 are available for NRC inspection as part of Unit 4 ITAAC Completion Package (Reference 3).
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 4 of 10 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 2.3.09.03.ii (Reference 3) and is available for NRC review.
ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 2.3.09.03.ii 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-800424, Rev. 0, Unit 4 Containment Hydrogen Control (VLS) Igniter Locations Inspection: ITAAC 2.3.09.03.ii Item 3.i) NRC Index Number: 424
- 2. SV4-VLS-ITR-801424, Rev. 0, Unit 4 Containment Hydrogen Control (VLS) Igniter Functionality Test and Parameter Displays: ITAAC 2.3.09.03.ii, Items 3.ii), 4.a), and 5 NRC Index Number: 424
- 3. 2.3.09.03.ii-U4-CP-Rev0, ITAAC Completion Package
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 5 of 10 Attachment A COL Appendix C Table 2.3.9-2 Equipment Name Tag Number Function Power Group Number Location Room No.
Hydrogen Igniter 01 VLS-EH-01 Energize 1
Tunnel connection loop compartments 11204 Hydrogen Igniter 02 VLS-EH-02 Energize 2
Tunnel connection loop compartments 11204 Hydrogen Igniter 03 VLS-EH-03 Energize 1
Tunnel connection loop compartments 11204 Hydrogen Igniter 04 VLS-EH-04 Energize 2
Tunnel connection loop compartments 11204 Hydrogen Igniter 05 VLS-EH-05 Energize 1
Loop compartment 02 11402 Hydrogen Igniter 06 VLS-EH-06 Energize 2
Loop compartment 02 11502 Hydrogen Igniter 07 VLS-EH-07 Energize 2
Loop compartment 02 11402 Hydrogen Igniter 08 VLS-EH-08 Energize 1
Loop compartment 02 11502 Hydrogen Igniter 09 VLS-EH-09 Energize 1
In-containment refueling water storage tank (IRWST) sparger side 11305 Hydrogen Igniter 10 VLS-EH-10 Energize 2
IRWST sparger side 11305 Hydrogen Igniter 11 VLS-EH-11 Energize 2
Loop compartment 01 11401 Hydrogen Igniter 12 VLS-EH-12 Energize 1
Loop compartment 01 11501
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 6 of 10 Attachment A (cont)
Equipment Name Tag Number Function Power Group Number Location Room No.
Hydrogen Igniter 13 VLS-EH-13 Energize 1
Loop compartment 01 11401 Hydrogen Igniter 14 VLS-EH-14 Energize 2
Loop compartment 01 11501 Hydrogen Igniter 15 VLS-EH-15 Energize 2
IRWST vacuum breaker vents 11305 Hydrogen Igniter 16 VLS-EH-16 Energize 1
IRWST vacuum breaker vents 11305 Hydrogen Igniter 17 VLS-EH-17 Energize 2
Northeast valve room 11207 Hydrogen Igniter 18 VLS-EH-18 Energize 1
Northeast accumulator room 11207 Hydrogen Igniter 19 VLS-EH-19 Energize 2
East valve room 11208 Hydrogen Igniter 20 VLS-EH-20 Energize 2
Southeast accumulator room 11206 Hydrogen Igniter 21 VLS-EH-21 Energize 1
Southeast valve room 11206 Hydrogen Igniter 22 VLS-EH-22 Energize 1
Lower compartment area (core makeup tank
[CMT] and valve area) 11400 Hydrogen Igniter 23 VLS-EH-23 Energize 2
Lower compartment area (CMT and valve area) 11400 Hydrogen Igniter 24 VLS-EH-24 Energize 2
Lower compartment area (CMT and valve area) 11400 Hydrogen Igniter 25 VLS-EH-25 Energize 2
Lower compartment area (CMT and valve area) 11400
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 7 of 10 Attachment A (cont)
Equipment Name Tag Number Function Power Group Number Location Room No.
Hydrogen Igniter 26 VLS-EH-26 Energize 2
Lower compartment area (CMT and valve area) 11400 Hydrogen Igniter 27 VLS-EH-27 Energize 1
Lower compartment area (CMT and valve area) 11300 Hydrogen Igniter 28 VLS-EH-28 Energize 1
Lower compartment area (CMT and valve area) 11400 Hydrogen Igniter 29 VLS-EH-29 Energize 1
Lower compartment area (CMT and valve area) 11400 Hydrogen Igniter 30 VLS-EH-30 Energize 2
Lower compartment area (CMT and valve area) 11403 Hydrogen Igniter 31 VLS-EH-31 Energize 1
Lower compartment area (CMT and valve area) 11400 Hydrogen Igniter 32 VLS-EH-32 Energize 1
Lower compartment area (CMT and valve area) 11400 Hydrogen Igniter 33 VLS-EH-33 Energize 2
North CVS equipment room 11209 Hydrogen Igniter 34 VLS-EH-34 Energize 1
North CVS equipment room 11209 Hydrogen Igniter 35 VLS-EH-35 Energize 1
IRWST hooded vents 11500 Hydrogen Igniter 36 VLS-EH-36 Energize 2
IRWST hooded vents 11500 Hydrogen Igniter 37 VLS-EH-37 Energize 1
IRWST hooded vents 11500
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 8 of 10 Attachment A (cont)
Equipment Name Tag Number Function Power Group Number Location Room No.
Hydrogen Igniter 38 VLS-EH-38 Energize 2
IRWST hooded vents 11500 Hydrogen Igniter 39 VLS-EH-39 Energize 1
Upper compartment lower region 11500 Hydrogen Igniter 40 VLS-EH-40 Energize 2
Upper compartment lower region 11500 Hydrogen Igniter 41 VLS-EH-41 Energize 2
Upper compartment lower region 11500 Hydrogen Igniter 42 VLS-EH-42 Energize 1
Upper compartment lower region 11500 Hydrogen Igniter 43 VLS-EH-43 Energize 1
Upper compartment lower region 11500 Hydrogen Igniter 44 VLS-EH-44 Energize 1
Upper compartment lower region 11500 Hydrogen Igniter 45 VLS-EH-45 Energize 2
Upper compartment lower region 11500 Hydrogen Igniter 46 VLS-EH-46 Energize 2
Upper compartment lower region 11500 Hydrogen Igniter 47 VLS-EH-47 Energize 1
Upper compartment lower region 11500 Hydrogen Igniter 48 VLS-EH-48 Energize 2
Upper compartment lower region 11500 Hydrogen Igniter 49 VLS-EH-49 Energize 1
Pressurizer compartment 11503 Hydrogen Igniter 50 VLS-EH-50 Energize 2
Pressurizer compartment 11503 Hydrogen Igniter 51 VLS-EH-51 Energize 1
Upper compartment mid-region 11500
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 9 of 10 Attachment A (cont)
Equipment Name Tag Number Function Power Group Number Location Room No.
Hydrogen Igniter 52 VLS-EH-52 Energize 2
Upper compartment mid-region 11500 Hydrogen Igniter 53 VLS-EH-53 Energize 2
Upper compartment mid-region 11500 Hydrogen Igniter 54 VLS-EH-54 Energize 1
Upper compartment mid-region 11500 Hydrogen Igniter 55 VLS-EH-55 Energize 1
Refueling cavity 11504 Hydrogen Igniter 56 VLS-EH-56 Energize 2
Refueling cavity 11504 Hydrogen Igniter 57 VLS-EH-57 Energize 2
Refueling cavity 11504 Hydrogen Igniter 58 VLS-EH-58 Energize 1
Refueling cavity 11504 Hydrogen Igniter 59 VLS-EH-59 Energize 2
Pressurizer compartment 11503 Hydrogen Igniter 60 VLS-EH-60 Energize 1
Pressurizer compartment 11503 Hydrogen Igniter 61 VLS-EH-61 Energize 1
Upper compartment-upper region 11500 Hydrogen Igniter 62 VLS-EH-62 Energize 2
Upper compartment-upper region 11500 Hydrogen Igniter 63 VLS-EH-63 Energize 1
Upper compartment-upper region 11500 Hydrogen Igniter 64 VLS-EH-64 Energize 2
Upper compartment-upper region 11500 Hydrogen Igniter 65 VLS-EH-65 Energize 1
IRWST roof vents 11500 Hydrogen Igniter 66 VLS-EH-66 Energize 2
IRWST roof vents 11500
U.S. Nuclear Regulatory Commission ND-23-0171 Enclosure Page 10 of 10 Attachment B COL Appendix C 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