CNL-13-137, Third Progress Update on Improved Flood Mitigation System Project
| ML14003A171 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar, Sequoyah  |
| Issue date: | 12/31/2013 |
| From: | James Shea Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| CNL-13-137 | |
| Download: ML14003A171 (4) | |
Text
Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37 402 CNL-13-137 December31, 2013 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 10 CFR 50.4
Subject:
Third Progress Update on Improved Flood Mitigation System Project
References:
- 1. Letter from TVA to NRC, "Commitment to Install Improved Flood Mitigation Systems," dated April16, 2013
- 2. Letter from TVA to NRC, "Progress Update on Improved Flood Mitigation System Project," dated July 1, 2013
- 3. Letter from TVA to NRC, "Second Progress Update on Improved Flood Mitigation System Project," dated September 30, 2013 By letter dated April16, 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, TV A 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 TVA's 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).
Printed on racycled paper
U.S. Nuclear Regulatory Commission Page2 December31, 2013 The purpose of this letter is to provide the third written progress 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 TVA's 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 October 1, 2013, to December 13, 2013, is provided below.
Task 2, Develop Project Plan, and Task 3, Perform Conceptual Design Phase, are complete. The following actions were completed:
- a. The WBN Design Criteria was issued on October 15, 2013.
- b. The Statement of Work for the Preliminary Engineering Phase was approved on October 23, 2013.
- c. A request for proposal was issued to prospective bidders on October 25, 2013.
Task 4, Perform Preliminary Design Phase, has begun. The project schedule for the Preliminary Design has been extended by 35 working days (i.e., from February 27, 2014 to April17, 2014) to allow more time for the development of the system functional requirements and to obtain a better understanding of the state of the plants beyond the probable maximum flood (PMF). The bidders have been tasked with submitting a Failure Modes and Effects Analysis (FMEA) for reactor decay heat removal and coolant water make-up at flood levels above the PMF. This extension affects the start of Task 5 but does not affect the overall implementation scheduled finish date.
For Task 4, the following actions have been completed:
- a. Pre-bid conference with the prospective bidders for the preliminary design was held on November 7, 2013.
- b. Bid proposals were received on December 6, 2013.
The following Task 4 actions are scheduled to be completed between January 1, 2014, and April30, 2014:
- b. Preparation of system functional calculations.
- c. Preliminary system design/layout drawings.
- d. Preliminary equipment sizing and Bill of Materials.
- e. Budgetary cost estimate and schedule for Tasks 5, 6, and 7.
U.S. Nuclear Regulatory Commission Page 3 December 31, 2013 The length of the Engineering Design Phase was increased to be consistent with actual experience gained from the Fukushima Response Design Team. The Engineering Design Phase was extended three months. The scheduled start of implementation has been delayed commensurate with the increased Engineering Design Phase. The scheduled implementation finish date remains unchanged.
TABLE 1 PROJECT STATUS SCHEDULE (updates shown in bold type)
Task Scheduled Start Scheduled 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 8
Project Closeout 12/16/16 09/30/17 Not Started
U.S. Nuclear Regulatory Commission Page4 December31, 2013 TVA will provide the fourth quarterly written progress update regarding the improved flood mitigation system project by March 30, 2014, consistent with Commitment 2 in Enclosure 2 of TVA's letter to NRC dated Apri116, 2013 (Reference 1).
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.
Respectfully, 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