ML19304A223

NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Correct Unbalanced Voltage Relay Instrumentation Values (TS-19-22)

ML19304A223
Person / Time
Site:	Watts Bar
Issue date:	10/31/2019
From:	Kimberly Green NRC/NRR/DORL/LPL2-2
To:	Wells R Tennessee Valley Authority
References
L-2019-LLA-0228
Download: ML19304A223 (3)

Text

NRR-DRMAPEm Resource From: Green, Kimberly Sent: Thursday, October 31, 2019 8:01 AM To: Wells, Russell Douglas Cc: kdhulvey@tva.gov; cedmondson@tva.gov; Shoop, Undine

Subject:

Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Correct Unbalanced Voltage Relay Instrumentation Values (TS-19-22) (EPID L-2019-LLA-0228)

Dear Mr. Wells:

By letter dated October 23, 2019 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML19296C538), Tennessee Valley Authority (TVA) submitted a license amendment request (LAR) for the Watts Bar Nuclear Plant (WBN), Units 1 and 2. The proposed amendments would revise the WBN Technical Specification Table 3.3.5-1, LOP DG Start Instrumentation, Function 5, 6.9 kV Emergency Bus Undervoltage (Unbalanced Voltage), values for the allowable value (AV) for the unbalanced voltage relay (UVR) low trip voltage, the AV for the UVR high trip time delay, and the trip setpoint for the UVR high trip time delay. These amendments would correct erroneous values issued in Amendment Nos. 128 and 31, dated August 27, 2019.

The purpose of this email is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staffs acceptance review of the proposed LAR. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant.

Consistent with Section 50.90 of Title 10 of the Code of Federal Regulations, an amendment to the license (including the technical specifications) must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications.

The NRC staff has reviewed TVAs application and concluded that it does provide technical information in sufficient detail to enable the NRC staff to complete its detailed technical review and make an independent assessment regarding the acceptability of the proposed amendments in terms of regulatory requirements and the protection of public health and safety and the environment. Given the lesser scope and depth of the acceptance review as compared to the detailed technical review, there may be instances in which issues that impact the NRC staffs ability to complete the detailed technical review are identified despite completion of an adequate acceptance review. If additional information is needed, you will be advised by separate correspondence.

Based on the information provided in TVAs submittal, the NRC staff has estimated that this licensing request will take approximately 300 hours12.5 days <br />1.786 weeks <br />0.411 months <br /> to complete and that the review can be completed by the requested date of December 13, 2019. If there are emergent complexities or challenges in our review that would cause changes to the initial forecasted completion date or significant changes in the forecasted hours, the reasons for the changes, along with the new estimates will be communicated, during the routine interactions.

These estimates are based on the staffs initial review of the application and they could change, due to several factors including requests for additional information and unanticipated addition of scope to the review.

If you have any questions, please contact me at (301) 415-1627.

Sincerely, 1

Kimberly J. Green, Senior Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 2

Hearing Identifier: NRR_DRMA Email Number: 295 Mail Envelope Properties (MN2PR09MB4016FE52512108462B18B3D88F630)

Subject:

Acceptance Review Results for Watts Bar Nuclear Plant, Units 1 and 2, License Amendment Request to Correct Unbalanced Voltage Relay Instrumentation Values (TS-19-22) (EPID L-2019-LLA-0228)

Sent Date: 10/31/2019 8:00:37 AM Received Date: 10/31/2019 8:00:00 AM From: Green, Kimberly Created By: Kimberly.Green@nrc.gov Recipients:

"kdhulvey@tva.gov" <kdhulvey@tva.gov>

Tracking Status: None "cedmondson@tva.gov" <cedmondson@tva.gov>

Tracking Status: None "Shoop, Undine" <Undine.Shoop@nrc.gov>

Tracking Status: None "Wells, Russell Douglas" <rdwells0@tva.gov>

Tracking Status: None Post Office: MN2PR09MB4016.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 3333 10/31/2019 8:00:00 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: