ML21140A017

NRR E-mail Capture - Change of Completion Date for Review of Watts Bar Nuclear Plant, Unit 2, License Amendment Request to Apply Temperature Adjustment to Growth Rate Calculation

ML21140A017
Person / Time
Site:	Watts Bar
Issue date:	05/19/2021
From:	Kimberly Green NRC/NRR/DORL/LPL2-2
To:	Wells R Tennessee Valley Authority
References
L-2021-LLA-0026
Download: ML21140A017 (2)

Text

From: Green, Kimberly Sent: Wednesday, May 19, 2021 5:04 PM To: Wells, Russell Douglas

Subject:

Change of Completion Date for Review of Watts Bar Nuclear Plant, Unit 2, License Amendment Request to Apply Temperature Adjustment to Growth Rate Calculation (EPID L-2021-LLA-0026)

Dear Mr. Wells:

By letter dated February 25, 2021 (Agencywide Documents Access and Management System Accession No. ML21056A623), Tennessee Valley Authority (TVA) submitted a license amendment request (LAR) for the Watts Bar Nuclear Plant (Watts Bar), Unit 2. The proposed amendment would revise the Watts Bar Nuclear Plant dual-unit Updated Final Safety Analysis Report to apply a temperature adjustment to the growth rate calculation used to determine the end-of-cycle distribution of indications of axial outside diameter stress corrosion cracking at tube support plates in support of the Watts Bar, Unit 2 operational assessment.

By email dated March 10, 2021 (ADAMS Accession No. ML21074253), I informed you of the U.S. Nuclear Regulatory Commissions (NRC) results of the acceptance review. In that email, I stated that the NRC staffs estimated level of effort would be 250 hours0.00289 days <br />0.0694 hours <br />4.133598e-4 weeks <br />9.5125e-5 months <br /> and that it could complete the review by May 19, 2021, which is TVAs requested date. The completion date was based on the issuance of a request for additional information (RAI) by April 2, 2021, and a response from TVA by April 16, 2021. During a clarification call regarding the draft RAI, TVA requested a 30-day response time. Subsequently, TVA requested an additional 2 weeks to respond to the RAI in order to consider the results of causal analysis. The NRC staff did not object to the additional 2 week request. As a result of these circumstances, the NRC now estimates that it can complete its review by June 30, 2021. If circumstances change, I will communicate the status and any changes in the estimated level of effort or completion date and the reason for the change.

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

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

Hearing Identifier: NRR_DRMA Email Number: 1198 Mail Envelope Properties (MN2PR09MB5739C2DE0EC3252952143D598F2B9)

Subject:

Change of Completion Date for Review of Watts Bar Nuclear Plant, Unit 2, License Amendment Request to Apply Temperature Adjustment to Growth Rate Calculation (EPID L-2021-LLA-0026)

Sent Date: 5/19/2021 5:04:04 PM Received Date: 5/19/2021 5:04:00 PM From: Green, Kimberly Created By: Kimberly.Green@nrc.gov Recipients:

"Wells, Russell Douglas" <rdwells0@tva.gov>

Tracking Status: None Post Office: MN2PR09MB5739.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 1915 5/19/2021 5:04:00 PM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: