BVY 10-033, 10CFR50.46(a)(3)(ii) Report Covering Initial Operation of Plant Cycle 28 Commencing in May 2010

10CFR50.46(a)(3)(ii) Report Covering Initial Operation of Plant Cycle 28 Commencing in May 2010

ML101620131
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	06/07/2010
From:	Devincentis J Entergy Nuclear Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BVY 10-033
Download: ML101620131 (2)

Text

Entergy Nuclear Operations, Inc.

Vermont Yankee 320 Governor Hunt Road Vernon, VT 05354 Tel 802 257 7711 James M. DeVincentis Licensing Manager BVY 10-033.

June 7, 2010 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

SUBJECT:

10CFR50.46(a)(3)(ii) Report Vermont Yankee Nuclear Power Station Docket No. 50-271 License No. DPR-28

REFERENCES:

(1) Letter, Entergy to USNRC, Vermont Yankee Nuclear Power Station 10CFR50.46(a)(3)(ii) Annual Report for 2009, BVY 10-001, dated January 14, 2010 (2) Global Nuclear Fuel Report, 0000-0100-8140-SRLR, Revision 2, Supplemental Reload Licensing Report for Vermont Yankee Nuclear Power Station Reload, Cycle 28, dated May 2010

Dear Sir or Madam:

This letter is to report, in accordance with 10CFR50.46(a)(3)(ii), a change in peak cladding temperature (PCT) for the Vermont Yankee (VY) Emergency Core Cooling System (ECCS) Loss of Coolant Accident (LOCA) analysis. This report covers initial operation of VY Cycle 28 commencing in May 2010.

Since the last 10CFR50.46 report provided to the NRC (Reference 1), VY loaded a new fuel type (GNF2) necessitating a change in PCT. The new licensing basis PCT, calculated for the GE14 and GNF2 fuel types VY currently has loaded in its core, is documented in Reference (2). Additionally, since 2007 VY has had four GNF2 Lead Use Assemblies (LUAs) in the core. The GNF2 LUA bundles in the Cycle 28 core have been evaluated as Lead Use Assemblies. The limiting PCT for these bundles is confirmed to remain below the 10CFR50.46 limit of 2200 0 F.

For Cycle 28, VY used the General Electric (GE) SAFER/GESTR methodology for the evaluation of the ECCS/LOCA. The results are summarized and reported in Reference (2).

The following table summarizes the current ECCS performance analysis results performed by Global Nuclear Fuels (GNF) using their NRC approved methodology, for the VY Cycle 28 fuel types.

Am

BVY 10-033 / page 2 of 2 Summary of 10CFR50.46 Changes for Vermont Yankee 10CFR50.46 Change 10CFR50.46 Change Licensing Basis Delta Identification Description PCT (deg F) for:

GE14 GNF2 Cycle 28 Reload GNF2 fuel type 0 N/A introduction Total Delta PCT 0 N/A Previous Licensing Basis 1960 N/A PCT from Reference (b)

Current Licensing Basis 1960 2060 PCT Since the PCT for the GE14/GNF2 fuel types is within the acceptance criterion of 10CFR50.46(b)(1), there is .no need for re-analysis or other licensee action per 10CFR50.46(a)(3)(ii).

There are no new regulatory commitments being made in this submittal.

If you have any questions concerning this submittal, please contact me at (802) 451-3150.

Sincerely,

[JMD/JTM]

cc: Mr. Samuel J. Collins, Region 1 Administrator U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406-1415 Mr. James S. Kim, Project Manager Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 USNRC Resident Inspector Vermont Yankee Nuclear Power Station 320 Governor Hunt Road Vernon, VT 05354 Mr. David O'Brien, Commissioner VT Department of Public Service 112 State Street, Drawer 20 Montpelier, VT 05620-2601