CNL-14-048, Fourth Progress Update on Improved Flood Mitigation System Project

Fourth Progress Update on Improved Flood Mitigation System Project

ML14092A279
Person / Time
Site:	Watts Bar, Sequoyah
Issue date:	03/31/2014
From:	James Shea Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNL-14-048, L44 140331 005
Download: ML14092A279 (4)

Text

L44 140331 005 Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 CNL-14-048 March 31, 2014 10 CFR 50.4 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Sequoyah Nuclear Plant, Units 1 and 2 Facility Operating Licenses Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328 Watts Bar Nuclear Plant, Unit 1 Facility Operating License No. NPF-90 NRC Docket No. 50-390 Watts Bar Nuclear Plant, Unit 2 Construction Permit No. CPPR-92 NRC Docket No. 50-391

Subject:

Fourth Progress Update on Improved Flood Mitigation System Project

References:

1. Letter from TVA to NRC, Commitment to Install Improved Flood Mitigation Systems, dated April 16, 2013 (ML13108A107)

2. Letter from TVA to NRC, Progress Update on Improved Flood Mitigation System Project, dated July 1, 2013 (ML13189A135)

3. Letter from TVA to NRC, Second Progress Update on Improved Flood Mitigation System Project, dated September 30, 2013 (ML13276A048)

4. Letter from TVA to NRC, Third Progress Update on Improved Flood Mitigation System Project, dated December 31, 2013

U.S. Nuclear Regulatory Commission Page 2 March 31, 2014 By letter dated April 16, 2013, the Tennessee Valley Authority (TVA) committed to install improved flood mitigation systems at the Sequoyah Nuclear Power Plant (SQN), Units 1 and 2, and the Watts Bar Nuclear Plant (WBN), Units 1 and 2 (Reference 1). TVA committed to complete implementation of the improved flood mitigation systems at SQN and WBN by December 31, 2016. TVA also committed to provide periodic written updates regarding the progress of the project. During a public meeting on June 27, 2013, TVA briefed the NRC regarding the status of the improved flood mitigation project and provided the first progress update on July 1, 2013 (Reference 2). TVA also committed in the first progress update (Reference 2) to develop a set of major tasks through TVAs engineering design and project controls processes and to discuss these major tasks as part of the periodic written progress updates. TVA submitted the second progress update on September 30, 2013 (Reference 3) and the third progress update on December 31, 2013 (Reference 4).

The purpose of this letter is to provide the fourth written update regarding the progress of the improved flood mitigation system project consistent with Commitment 2 in Enclosure 2 of the Reference 1 letter and Commitment 1 in Enclosure 1 of the Reference 2 letter.

During the June 27, 2013, public meeting and in the first update (Reference 2), TVA advised the NRC that engineering design and project controls for the project are being developed consistent with TVAs existing design and project management procedures. The Project Status Schedule, provided in Table 1 on page 3 of this letter, lists the major tasks associated with the design and project controls developed to implement the flood mitigation system. Table 1 will be used to provide the overall status of the improved flood mitigation system project each quarter. The status of the Table 1 tasks from December 14, 2013, to March 17, 2014, is provided below.

Task 4, Perform Preliminary Design Phase is on schedule. Project Kickoff meetings with SQN and WBN were held on January 28, 2014 and February 27, 2014, respectively. The design vendor completed the draft failure modes and effects analysis (FMEA) on March 4, 2014. The results of the draft FMEA were reviewed by the TVA technical design oversight team on March 6, 2014.

The following Task 4 actions are scheduled for completion by April 30, 2014:

a. Preparation of system functional calculations.

b. Preliminary system design/layout drawings.

c. Preliminary equipment sizing and Bill of Materials.

d. Budgetary cost estimate and schedule for Tasks 5, 6, and 7 Task 5, Conduct Engineering Design Phase, is scheduled to start by May 1, 2014, following completion of the Task 4 as indicated in Table 1.

Task 8, Project Closeout, has been removed from Table 1. This task is for finalizing the project financial and demobilizing activities after implementation of the flood mitigation system and has no status or impact to completing the project.

U.S. Nuclear Regulatory Commission Page 3 March 31, 2014 TABLE 1 PROJECT STATUS SCHEDULE Scheduled Scheduled Task Start Finish Status 1 Team Organization Structure 05/29/13 Completed 2 Develop Project Plan 10/30/13 Completed 3 Perform Conceptual Design Phase 10/30/13 Completed 4 Perform Preliminary Design Phase 10/01/13 04/30/14 In-Progress 5 Conduct Engineering Design Phase 05/01/14 04/30/15 Not Started 6 Procure Long-Lead Items 01/07/15 10/21/15 Not Started 7 Implementation 05/01/15 12/30/16 Not Started

U.S. Nuclear Regulatory Commission Page4 March 31, 2014 TVA will provide the fifth quarterly written progress update regarding the improved flood mitigation system project by June 30, 2014, consistent with Commitment 2 in Enclosure 2 of TVA's letter to NRC dated April 16, 2013(Reference1).

There are no new regulatory commitments contained in this letter.

If you have questions regarding this update, please contact Kevin Casey at (423) 751-8523.

J. W. Shea Vice President, Nuclear Licensing cc:

NRC Regional Administrator - Region II NRR Director - NRC Headquarters NRC Senior Resident Inspector - Sequoyah Nuclear Plant NRC Senior Resident Inspector - Watts Bar Nuclear Plant NRR Project Manager - Sequoyah Nuclear Plant NRR Project Manager - Watts Bar Nuclear Plant, Unit 1 NRR Project Manager - Watts Bar Nuclear Plant, Unit 2