NL-04-0072, Proposed Technical Specifications Revisions to Primary Containment Leakage Rate Testing Program
| ML040270223 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 01/23/2004 |
| From: | Sumner H Southern Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NL-04-0072 | |
| Download: ML040270223 (2) | |
Text
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H. L Sumner, Jr.
Southern Nuclear Vice President Operating Company, Inc.
Hatch Project Post Office Box 1295 Birmingham. Alabama 35201 Tel 205.992.7279 SOUTHERNEAu January 23, 2004 COMPANY Energy to Serve Your World" Docket Nos.:
50-321 NL-04-0072 50-366 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Proposed Technical Specifications Revision to Primary Containment Leakage Rate Testing Program Ladies and Gentlemen:
By letter dated December 1, 2003, Southern Nuclear Operating Company submitted a proposed Technical Specifications (TS) revision to the peak calculated post accident primary containment internal pressure (Pa), in section 5.5.12, "Primary Containment Leakage Rate Testing Program", of the Unit I and 2 TS. TS maximum operating pressure, high pressure scram setpoints, maximum thermal power and SRV setpoints are not changed by this request. The proposed change supports a 10 psi increase in Unit I and Unit 2 nominal reactor operating pressure for turbine controls optimization.
SNC has implemented the recently NRC approved Measurement Uncertainty Recapture Power Uprates (MURPU), reflecting a change in Rated Thermal Power of 1.5%. The Hatch MURPU utilizes the NRC approved Crossflow advanced feedwater flow measurement technology. With the implementation of this technology, the corrected feedwater mass flow results in a calculated core thermal power less than that calculated with the standard plant instrumentation. At the current limiting turbine 't stage throttle pressure, the resulting calculated core thermal power is approximately I% less than the rated thermal power of 2804 MWTh. SNC intends to implement a 10 psi increase in the nominal operating pressure for optimization of the turbine control system, thereby realizing the full 1.5% uprate. The turbine optimization will allow both units to fully operate at the new rated thermal power.
Implementation will entail procedures, setpoints and instrumentation modifications. To implement these changes on-line increases the possibility of introducing unnecessary transients on the plant systems. Hence, SNC hereby respectfully requests an expeditious review of the proposed Technical Specifications amendment to the peak calculated post accident primary containment internal pressure. The amendment is hereby requested to be issued prior to May 2004, such that the implementation of the turbine optimization can be performed during the low electrical demand period for the Southern Company.
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U. S. Nuclear Regulatory Commission NL-04-0072 Page 2 In order to facilitate the requested expeditious review, SNC proposes to meet with the appropriate NRR staff to present the changes to the peak calculated post accident primary containment pressure associated with this amendment request, as well as the turbine optimization effort at your earliest convenience.
Mr. H. L. Sumner, Jr. states he is a Vice President of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and to the best of his knowledge and belief, the facts set forth in this letter are true.
This letter contains no NRC commitments. If you have any questions, please advise.
Respectfully submitted, SOUTHERN NUCLEAR OPERATING COMPANY H. L. Sumner, Jr.
Sworn to and subscribed before me this 23 day of 2
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LS/whc/daj cc:
Southern Nuclear Operating Company Mr. J. B. Beasley, Jr., Executive Vice President Mr. G. R. Frederick, General Manager - Plant Hatch Document Services RTYPE: CHAO2.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Mr. S. D. Bloom, NRR Project Manager - Hatch Mr. D. S. Simpkins, Senior Resident Inspector - Hatch State of Georgia Mr. L. C. Barrett, Commissioner - Department of Natural Resources