NL-03-1180, Measurement Uncertainty Recapture Power Uprate (Murpu)
| ML031540095 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 05/30/2003 |
| From: | Sumner H Southern Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NL-03-1180 | |
| Download: ML031540095 (2) | |
Text
Lewis Sumner Southern Nuclear Vice President Operating Company, Inc.
Hatch Project Support 40 Inverness Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.7279 Fax 205.992.0341 SOUTHERN A May 30, 2003 COMPANY Energy to Serve Your World C Docket Nos.:
50-321 NL-03-1180 50-366 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Measurement Uncertainty Recapture Power Uprate (MURPU)
Ladies and Gentlemen:
By letter dated December 19, 2002, Southern Nuclear Operating Company (SNC) submitted to the NRC a license amendment request for the Edwin I. Hatch Nuclear Plant Units 1 and 2. The proposed amendment increases the authorized maximum power level for both units from the current limit of 2763 CMWt to 2804 CMWt. of the December 19, 2002, amendment request provided a description of the installed Unit system as of the request date. However, following proof testing of the Unit I system, the installation has changed from that described in the amendment request.
This letter provides a description of the current Unit 1 configuration and a related clarification on system operation. The Unit 2 system configuration remains as described in the amendment request.
On Page E7-2,Section I.1.A., the second paragraph provides the following system descriptions: "The Unit I system consists of three flow-measurement devices installed on the "A" feedwater pipe, and a single device on the "B" feedwater pipe." "Each flow measurement device is composed of eight non-intrusive flow transducers (four primary/four redundant) strapped on the feedwater piping and a set of temperature sensing transducers connected via coax cable to a remote panel that acts as a data acquisition system and viewing system."
Following proof testing of the Unit 1 system, the unit one installation was changed to a single device on the "A" feedwater pipe and a single device on the "B" feedwater pipe.
The individual feedwater loops ("A" and "B") mass floNvrates will then be corrected by their respective measurement devices. With this configuration, the redundant transducers are now part of the primary measurement scheme, eliminating the redundancy feature.
This letter documents those items discussed in a conference call with the NRC on May 27, 2003.
Co0
U. S. Nuclear Regulatory Commission NL-03-1180 Page 2 This letter contains no NRC commitments. If you have any questions, please advise.
Sincerely, H. L. Sumner, Jr.
HLS/twl/whc cc:
Southern Nuclear Operating Company Mr. J. D. Woodard, Executive Vice President Mr. G. R. Frederick, General Manager - Plant Hatch Document Services RTYPE: CHAO2.004 U. S. Nuclear Regulatorv Commission Mr. L. A. Reyes, Regional Administrator Mr. S. D. Bloom, NRR Project Manager - Hatch Mr. N. P. Garrett, Acting Senior Resident Inspector - Hatch