ND-23-0459, ITAAC Closure Notification on Completion of ITAAC 2.6.01.04d (Index Number 587)

ITAAC Closure Notification on Completion of ITAAC 2.6.01.04d (Index Number 587)

ML23200A112
Person / Time
Site:	Vogtle
Issue date:	07/19/2023
From:	Coleman J Southern Nuclear Operating Co
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
ND-23-0459, ITAAC 2.6.01.04d
Download: ML23200A112 (1)

Text

Jamie M. Coleman Regulatory Affairs Director Vogtle 3 & 4 7825 River Road Waynesboro, GA 30830 706-848-6926 tel July 19, 2023 Docket No.:

52-026 ND-23-0459 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 2.6.01.04d [Index Number 587]

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 2.6.01.04d [Index Number 587]. This ITAAC confirms that each diesel generator provides power to the load with a generator terminal voltage of 480 +/- 10% volts and a frequency of 60 +/- 5% Hz. 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 2.6.01.04d [Index Number 587]

JMC/CSS/sfr

U.S. Nuclear Regulatory Commission ND-23-0459 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-23-0459 Enclosure Page 1 of 3 Southern Nuclear Operating Company ND-23-0459 Enclosure Vogtle Electric Generating Plant (VEGP) Unit 4 Completion of ITAAC 2.6.01.04d [Index Number 587]

U.S. Nuclear Regulatory Commission ND-23-0459 Enclosure Page 2 of 3 ITAAC Statement Design Commitment 4.d) Each ancillary diesel generator unit is sized to supply power to long-term safety-related post-accident monitoring loads and control room lighting and ventilation through a regulating transformer; and for one PCS recirculation pump.

Inspections/Tests/Analyses Each ancillary diesel generator will be operated with fuel supplied from the ancillary diesel generator fuel tank and with a load of 35 kW or greater and a power factor between 0.9 and 1.0 for a time period required to reach engine temperature equilibrium plus 2.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

Acceptance Criteria Each diesel generator provides power to the load with a generator terminal voltage of 480 +/-

10% volts and a frequency of 60 +/- 5% Hz.

ITAAC Determination Basis Testing was performed as documented in ITAAC Technical Report SV4-ECS-ITR-800587 (Reference 1) to confirm that each ancillary diesel generator unit is sized to supply power to long-term safety-related post-accident monitoring loads and control room lighting and ventilation through a regulating transformer; and for one PCS recirculation pump.

Each ancillary diesel generator was operated with fuel supplied from the ancillary diesel generator fuel tank and with a 75 kW load applied, at a power factor of 1.0, using a load bank.

The engine temperature was monitored to determine when the operating temperature reached equilibrium. Upon reaching equilibrium, the generator was operated for greater than 2.5-hours under 75 kW load while monitoring the generator terminal voltage, frequency, and power factor.

The results of each generator load test confirmed the diesel generator provides power to the load with a generator terminal voltage of 480 +/- 10% volts and a frequency of 60 +/- 5% Hz.

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

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 were no relevant ITAAC findings associated with this ITAAC. The ITAAC completion review is documented in the ITAAC Completion Package for ITAAC 2.6.01.04d (Reference 2) and is available for NRC review.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 2.6.01.04d 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.

U.S. Nuclear Regulatory Commission ND-23-0459 Enclosure Page 3 of 3 References (available for NRC inspection)

1. SV4-ECS-ITR-800587, Rev 0, Unit 4 Test Results for ECS Diesel Generator-Voltage and Frequency: ITAAC 2.6.01.04d, NRC Index Number: 587

2. 2.6.01.04d-U4-CP-Rev0, ITAAC Completion Package