ND-20-1188, ITAAC Closure Notification on Completion of ITAAC 2.2.03.08c.xii (Index Number 197)

ITAAC Closure Notification on Completion of ITAAC 2.2.03.08c.xii (Index Number 197)

ML22003A123
Person / Time
Site:	Vogtle
Issue date:	12/30/2021
From:	Yox M Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ND-20-1188
Download: ML22003A123 (7)

Text

Michael J. Vox 7825 River Road

!k Southern Nuclear Regulatory Affairs Director Waynesboro, GA 30830 Vogtle 3 & 4 706-848-6459 tel DEC 3 0 2021 Docket No.: 52-026 ND-20-1188 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 2.2.03.08c.xii [Index Number 1971 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 ITAAC 2.2.03.08c.xii

[Index Number 197]. This ITAAC verified that the downward slope of the CMT level sensors (PXS -11A/B/D/C, PXS -12A/B/C/D, PXS -13A/B/C/D, PXS -14A/B/C/D) upper level tap lines each have a downward slope of > 2.4 degrees from the centerline of the connection to the CMT to the centerline of the connection to the standpipe. 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 A. Roberts at 706-848-6991.

Respectfully submitted.

Michael J. Vox Regulatory Affairs Director Vogtle 3 & 4

Enclosure:

Vogtle Electric Generating Plant(VEGP) Unit 4 Completion of ITAAC 2.2.03.08c.xii [Index Number 197]

MJY/JFV/sfr

U.S. Nuclear Regulatory Commission ND-20-1188 Page 2 of 3 To:

Southern Nuclear Operating Company/Georgia Power Company Mr. Peter P. Sena III Mr. D. L. McKlnney Mr. H. NIeh Mr. G. Chick Mr. S. Stimac Mr. P. Martino Mr. J.B. Williams Mr. M. J. Yox 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. Beiike Mr. S. Leighty Ms. A. C. Chamberlain Mr. J. C. Haswell Document Services RTYPE: VND.LI.L06 File AR.01.02.06 Nuclear Reoulatorv Commission Ms. M. Bailey M M. King M G. Bowman Ms. A. Veil M C. P. Patel M G. J. Khouri M C. J. Even M 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 B. Davis M . J. Vasquez M . J. Eargle M T. Fanelli Ms. K. McCurry M J. Parent M B. Griman M V. Hall

U.S. Nuclear Regulatory Commission ND-20-1188 Page 3 of 3 Qqlethorpe Power Corporation Mr. R. B. Brinkman Mr. E. Rasmussen Municipal Electric Authority of Georgia Mr. J. E. Fuller Mr. 8. M. Jackson Daiton Utilities Mr. T. Bundros Westinqhouse Electric Company. LLC Dr. L. OrlanI Mr. D. 0. Durham 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 Sen/ice Commission Mr. R. L. Trokey, Georgia Public Service Commission Mr. K. C. Greene, Troutman Sanders Mr. 8. Blanton, Balch Bingham

U.S. Nuclear Regulatory Commission ND-20-1188 Enclosure Page 1 of 4 Southern Nuclear Operating Company ND-20-1188 Enclosure Vogtle Electric Generating Plant(VEGP) Unit 4 Completion of ITAAC 2.2.03.08c.xii [Index Number 197]

U.S. Nuclear Regulatory Commission ND-20-1188 Enclosure Page 2 of 4 ITAAC Statement Design Commitment:

8.c) The PXS provides RCS makeup, boration, and safety injection during design basis events.

inspections. Tests. Anaivses:

xii) inspections will be conducted of the CMT level sensors(PXS-11A/B/D/C, - 12A/B/C/D, -

13A/B/C/D, - 14A/B/C/D) upper level tap lines.

Acceptance Criteria:

xii) Each upper level tap line has a downward slope of s 2.4 degrees from the centeriine of the connection to the CMT to the centeriine of the connection to the standpipe.

ITAAC Determination Basis Multiple ITAAC are performed to demonstrate that the Passive Core Cooling System (PXS) provides Reactor Coolant System (RCS) makeup, boration, and safety injection during design basis events.

This ITAAC requires inspections to be performed of each Core Makeup Tank(CMT)level sensors (PXS-11A/B/D/C, -12A/B/C/D, -13A/B/C/D, -14A/B/C/D) upper level tap lines to verify that each upper level tap line has a downward slope of s 2.4 degrees from the centeriine of the connection to the CMT to the centeriine of the connection to the standpipe.

An inspection of the installed CMT level sensors upper level tap lines was performed using survey equipment in accordance with site survey and measurement procedures (Reference 1). The inspection was performed using specified survey locations and common reference points to measure the elevation and distance of each upper level tap line from the centeriine of the connection to the CMT to the centeriine of the connection to the standpipe. The survey measurements were recorded and used to calculate the as-built slope of each of the upper level tap line to ensure it meets the acceptance criteria.

The inspection results are shown in Attachment A and documented in the ITAAC Technical Report (Reference 2), which confirmed that each upper level tap line has a downward slope of s 2.4 degrees from the centeriine of the connection to the CMT to the centeriine of the connection to the standpipe and meets the ITAAC acceptance criteria.

Reference 2 is available for NRC inspection as part of the Unit 4 ITAAC 2.2.03.08c.xii Completion Package (Reference 3).

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 2.2.03.08c.xii (Reference 3) and is available for NRC review.

U.S. Nuclear Regulatory Commission ND-20-1188 Enclosure Page 3 of 4 ITAAC Completion Statement Based on the above Information, SNO hereby notifies the NRG that ITAAC 2.2.03.08c.xll 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 NRG inspection)

1. 26139-000-4MP-T81C-N3201, Rev. 7, Construction Survey

2. SV4-PXS-ITR-900197, Unit 4 Inspection of the PXS CMT Upper Level Tap Lines: ITAAC 2.2.03.08c.xll NRC Number 197, Revision 1

3. 2.2.03.08c.xll-U4-CP-Rev0, Completion Package

4. SV4-PXS-M6-001, Rev. 7, Piping and Instrumentation Diagram Passive Core Cooling System

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

U.S. Nuclear Regulatory Commission ND-20-1188 Enclosure Page 4 of 4 Attachment A GMT level sensors upper level tap line downward slope (Acceptance criteria s 2.4 degrees)

Unit 4 GMT Level GMT Level Upper Level Galculated Sensor GMT* Sensor* Tap Line++ as-built slope Standpipe+

(degrees)

PXS-11A/C PXS-MY-Y11A PXS-PL-L082A 7.8(max)- 2.5 (min)

PXS-11B/D PXS-MY-Y12A PXS-PL-L086A 5.6(max)- 2.6 (min)

PXS-MT-02A PXS-13A/C PXS-MY-Y13A PXS-PL-L092A 4.5(max)- 2.8 (min)

PXS-13B/D PXS-MY-Y14A PXS-PL-L096A 4.2(max)- 2.5 (min)

PXS-12A/C PXS-MY-Y12B PXS-PL-L082B 4.0(max)- 2.5 (min)

PXS-12B/D PXS-MY-Y11B PXS-PL-L086B 3.4(max)- 2.4 (min)

PXS-MT-02B PXS-14A/C PXS-MY-Y14B PXS-PL-L092B 3.4(max)- 2.4(min)

PXS-14B/D PXS-MY-Y13B PXS-PL-L096B 3.9(max)- 3.1 (min)

• Excerpt from COL Appendix C Table 2.2.3-1

+ Excerpt from UFSAR Table 3.2-3

++ Reference 5, Piping & Instrumentation Drawing SV4-PXS-M6-001