ND-21-0627, ITAAC Closure Notification on Completion of ITAAC Item 2.1.02.08b (Index Number 30)

ITAAC Closure Notification on Completion of ITAAC Item 2.1.02.08b (Index Number 30)

ML21239A427
Person / Time
Site:	Vogtle
Issue date:	08/27/2021
From:	Yox M Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ND-21-0627
Download: ML21239A427 (7)

Text

tk Southern Nuclear Michael J. Yox Regulatory Affairs Director 7825 River Road Waynesboro, GA 30830 Vogtle 3 & 4 706-848-6459 AUG 2 7 2021 Docket No.: 52-025 ND-21-0627 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 Item 2.1.02.08b [Index Number 301 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 2.1.02.08b [Index Number 30].

This ITAAC confirms the Reactor Coolant Pumps provide Reactor Coolant System flow coastdown on loss of power to the pumps. 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) request 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. Yox / V/'

Regulatory Affairs Director Vogtle 3 & 4

Enclosure:

Vogtle Electric Generating Plant(VEGP) Unit 3 Completion of ITAAC 2.1.02.08b [Index Number 30]

MJY/DLW/sfr

U.S. Nuclear Regulatory Commission ND-21-0627 Page 2 of 3 To:

Southern Nuclear Operating Company/ Georgia Power Company Mr. Peter P. Sena III Mr. D. L. McKinney Mr. M. D. Meier Mr. G. Chick Mr. S. Stimac Mr. P. Martino 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. J. M. Fisher Mr. R. L. Belike Mr. S. Leighty Ms. A. C. Chamberlain Mr. J. C. Haswell Document Services RTYPE: VND.Li.L06 File AR.01.02.06 cc:

Nuclear Requlatorv Commission Ms. M. Bailey Mr. M. King Mr. G. Bowman Ms. A. Veil M C. P. Patei M . G. J. Khouri M . C. J. Even M . B. J. Kemker Ms. N. C. Coovert M C. Welch M J. Gasievic M O. Lopez-Santiago M G. Armstrong M M. Webb M T. Fredette M C. Santos M B. Davis M J. Vasquez M J. Eargie M E. Davidson M T. Faneiii Ms. K. McCurry M J. Parent M B. Griman

U.S. Nuclear Regulatory Commission ND-21-0627 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 Dalton Utilities Mr. T. Bundros Westinahouse Electric Company. LLC Dr. L. Oriani 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 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-21-0627 Enclosure Page 1 of 4 Southern Nuclear Operating Company ND-21-0627 Enclosure Vogtle Electric Generating Piant(VEGP) Unit 3 Completion of ITAAC 2.1.02.08b [Index Number 30]

U.S. Nuclear Regulatory Commission ND-21-0627 Enclosure Page 2 of 4 ITAAC Statement Desion Commitment 8.b) The RCPs have a rotating inertia to provide RCS flow coastdown on loss of power to the pumps.

Inspections. Tests. Analvses A test will be performed to determine the pump flow coastdown curve.

Acceptance Criteria The pump flow coastdown will provide RCS flows greater than or equal to the flow shown in Figure 2.1.2-2,"Flow Transient for Four Cold Legs in Operation, Four Pumps Coasting Down."

ITAAC Determination Basis Testing was performed in accordance with Unit 3 preoperational test procedure 3-RCS-ITPP-506 (Reference 1) using Work Order 1071744(Reference 2)to confirm that the pump flow coastdown will provide Reactor Coolant System (RCS)flows greater than or equal to the flow shown in Figure 2.1.2-2,"Flow Transient for Four Cold Legs in Operation, Four Pumps Coasting Down."

The testing established the RCS at approximately 557°F and 2240 psig with all 4 Reactor Coolant Pumps(RCPs) at 100% speed for a minimum of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to ensure thermal stability.

Data acquisition recorders were started and utilized to monitor RCP breaker status and RCS flow data then all 4 RCPs were tripped simultaneously. Data was collected for 10 minutes after all 4 RCPs speed indicate 0 revolutions per minute. An evaluation (Reference 4) was documented in reference 1 and 3 and demonstrated that for Unit 3 the pump flow coastdown provided RCS flows greater than or equal to the flow shown in Figure 2.1.2-2,"Flow Transient for Four Cold Legs in Operation, Four Pumps Coasting Down."

References 1 through 4 are available for NRC inspection as part of Unit 3 ITAAC 2.1.02.08b Completion Package (Reference 5).

ITAAC Finding Review In accordance with plant procedures for ITAAC completion. Southern Nuclear Operating Company(SNC) performed a review of 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 2.1.02.08b (Reference 5)and is available for NRC review.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 2.1.02.08b was performed for VEGP Unit 3 and that the prescribed acceptance criteria were met.

U.S. Nuclear Regulatory Commission ND-21-0627 Enclosure Page 3 of 4 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 favailable for NRG inspection)

1. 3-RCS-ITPP-506, Rev. 3.0,"Reactor Coolant Pump and Reactor Coolant Flow Precore Hot Functional"

2. Work Order 1071744, Rev. 0,"Perform Pre-Op Test 3-RCS-ITPP-506"

3. SV3-RCS-ITR-800030, Rev. 0,"Unit 3 Recorded Results of RCS Flow Coastdown Measurement Test: ITAAC 2.1.02.08b"

4. SV3-RCS-T2C-5063, Rev. 0,"Vogtle Unit 3 RCS Flow Coastdown Preoperational Testing Results Validation"

5. 2.1.02.08b-U3-CP-Rev0, ITAAC Completion Package

U.S. Nuclear Regulatory Commission ND-21-0627 Enclosure Page 4 of 4 1.0 0.9 0.8 0.7 0.6 0.5 0.4 03 00 2.0 40 60 SO 100 Tims (sec)

Note; FOI = FractioQ of Initial Figure 2.1.2-2 Flow Transient foe Four Cold Legs in Operation, Four Pumps Coasting Down