RBG-46966, Report of Changes and Errors to 10 CFR 50.46
| ML093060391 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 10/27/2009 |
| From: | Lorfing D Entergy Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RBG-46966 | |
| Download: ML093060391 (3) | |
Text
Entergy Operations, Inc.
River Bend Station tergy 5485 U.S. Highway 61 N St. Francisville, LA 70775 T.15485
.Hg a
N David N. Lorfing Manager, Licensing October 27, 2009 RBG-46966 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
River Bend Station - Unit 1 Docket No. 50-458 License No. NPF-47 Report of Changes and Errors to 10CFR50.46
References:
- 1.
Letter RBG-46847, "10 CFR 50.46 (a)(3)(ii) Report," dated September 22, 2008.
- 2. Letter RBG-46863, "License Amendment Request (LAR) Changes to Technical Specification 5.6.5 - Core Operating Limits Report (COLR),"
dated November 20, 2008.
- 3. Letter RBG-46493, ""Supplement to Amendment Request Changes to Technical Specification 5.6.5, "Core Operating Limits Report (COLR),"
dated August 12, 2009.
- 4. Letter RBC-50745, "Issuance of Amendment Re: Changes Technical Specification 5.6.5 - Core Operating Limits Report (COLR)," dated September 9, 2009 (TAC # ME 0157).
Dear Sir or Madam:
In accordance with 10 CFR 50.46 (a)(3)(ii), River Bend Station (RBS) is required to report to the Commission, at least annually, the estimated effect on the limiting Emergency Core Cooling System (ECCS) analysis caused by changes to or errors discovered in acceptable ECCS evaluations for information. This report will address the annual reporting requirement and the 30 day reporting for the change in the analysis of record resulting in a decrease in the Peak Clad Temperature of 159 0F as discussed below.
RBG-46966 Page 2 of 3 Since the last 10CFR50.46 report provided to the NRC [Reference 1], there have been no notices of changes or errors in the RBS ECCS performance analysis supporting operations up to Cycle 16.
Beginning in Cycle 16, RBS introduced a new fuel type (GE14) into the core. As a result, the RBS ECCS Performance Analysis was updated using the fuel vendor, General Electric/Global Nuclear Fuel (GE /GNF) approved analytical methods to perform licensing calculations.
RBS submitted a License Amendment Request (LAR) [Reference 2] to revise TS 5.6.5 to add a reference to a new analytical method to be used to determine-core operating limits.
RBS also provided supplemental information [Reference 3] describing'the approved ECCS evaluation model to be used to determine the Peak Clad Temperature (PCT) for both the new GE14 fuel and legacy ATRIUM-10 fuel types and the quantitative results of the analysis.
ATRIUM-10 Analysis of Record (AOR) used in the LAR resulted in a decrease in the ATRIUM-10 Peak Clad Temperature of 159°F. The ATRIUM-10 is the fuel type with the limiting PCT. The LAR was approved by the NRC in Reference 4. There have been no changes or errors associated with the RBS ECCS Performance analysis since the implementation of the new AOR described above.
'The Table below summarizes the current ECCS Performance analysis performed by GE/GNF using their NRC approved methodology.
Notification Nature of change Estimated PCT Effect None New Analysis N/A Sum of absolute magnitude of errors during this period 0
Cumulative sum of absolute magnitude of errors prior to this period 0
Cumulative sum of absolute magnitude of errors including this period 0
This letter does not contain any commitments.
For further information, contact myself, David Lorfing at (225) 381-4157.
Sincerely, Manager, Licensing River Bend Station - Unit 1 DNL/bmb
RBG-46966 Page 3 of 3 cc: Regional Administrator U. S. Nuclear Regulatory Commission Region IV 612 E. Lamar Blvd., Suite 400 Arlington, TX 76011-4125 NRC Senior Resident Inspector P. 0. Box 1050 St. Francisville, LA 70775 U. S. Nuclear Regulatory Commission Attn: Mr. Alan B. Wang MS 0-7 D1 Washington, DC 20555-0001 Mr. Jeffrey P. Meyers Louisiana Department of Environmental Quality Office of Environmental Compliance Attn. OEC - ERSD P. O. Box 4312 Baton Rouge, LA 70821-4312