CNL-18-008, Anchor Darling Double Disc Gate Valve Commitment Revision

Anchor Darling Double Disc Gate Valve Commitment Revision

ML18016A032
Person / Time
Site:	Browns Ferry
Issue date:	01/11/2018
From:	James Shea Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNL-18-008
Download: ML18016A032 (3)

Text

Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 CNL-18-008 January 11, 2018 10 CFR 50.4 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Browns Ferry Nuclear Plant, Units 1, 2, and 3 Renewed Facility Operating License Nos. DPR-33, DPR-52, and DPR-68 NRC Docket Nos. 50-259, 50-260, and 50-296

Subject:

TENNESSEE VALLEY AUTHORITY (TVA) - BROWNS FERRY NUCLEAR PLANT ANCHOR DARLING DOUBLE DISC GATE VALVE COMMITMENT REVISION

Reference:

TVA letter to NRC, Tennessee Valley Authority - Anchor Darling Double Disc Gate Valve Information and Status, dated December 28, 2017 (ML17362A566)

In the Reference letter dated December 28, 2017, TVA provided a listing of the Anchor Darling double disc gate valve (ADDDGV) population with active safety functions along with relevant valve information, including the results of susceptibility evaluations and repair status, for the Browns Ferry Nuclear Plant, Units 1, 2, and 3; and the Sequoyah Nuclear Plant, Units 1 and 2. The Reference letter also confirmed that Watts Bar Nuclear Plant (WBN), Units 1 and 2, does not use ADDDGVs to support any active safety function.

The purpose of this letter is to provide updated commitments regarding the BFN Units 1, 2, and 3, ADDDGV motor-operated valves that are categorized as Susceptible and Not Repaired in Enclosure 1 of the Reference letter. TVA, based on continued evaluation, has determined feasible repair schedules for these valves and is revising the BFN commitments accordingly.

The Enclosure to this letter reflects the revised commitments for BFN Units 1, 2, and 3 for the ADDDGV issue. These commitments supersede Commitment 4 in Enclosure 3 of the Reference letter.

U.S. Nuclear Regulatory Commission CNL-18-008 Page 2 January 11, 2018 TVA may modify these commitments should additional technical information or repair methods become available to justify such action.

If you have any questions regarding this submittal, please contact Russell Thompson at (423) 751-2567.

Respectfully, Digitally signed by J. W. Shea J. W. Shea DN: cn=J. W. Shea, o=Tennessee Valley Authority, ou=Nuclear Licensing, email=jwshea@tva.gov, c=US Date: 2018.01.11 12:24:51 -05'00' J. W. Shea Vice President, Nuclear Regulatory Affairs and Support Services

Enclosure:

Summary of Commitments cc (Enclosure):

NRR Director - NRC Headquarters NRC Regional Administrator - Region II NRC Project Manager - Browns Ferry Nuclear Plant NRC Senior Resident Inspector - Browns Ferry Nuclear Plant

Enclosure Summary of Commitments

1. TVA will repair the following BFN Unit 1 Anchor Darling double disc gate valve MOVs no later than the Fall 2022 refueling outage: 1-FCV-068-0003, 1-FCV-068-0079, 1-FCV-075-0009, and 1-FCV-075-0037.

2. TVA will repair the following BFN Unit 2 Anchor Darling double disc gate valve MOVs no later than the Spring 2021 refueling outage: 2-FCV-068-0003, and 2-FCV-068-0079.

3. TVA will repair the following BFN Unit 3 Anchor Darling double disc gate valve MOVs no later than the Spring 2022 refueling outage: 3-FCV-068-0003, and 3-FCV-068-0079.