NLS2014009, Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2013

Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2013

ML14023A607
Person / Time
Site:	Cooper
Issue date:	01/17/2014
From:	Vanderkamp D Nebraska Public Power District (NPPD)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NLS2014009
Download: ML14023A607 (3)

Text

N Nebraska Public Power District Always there when you need us NLS2014009 50.46(a)(3)(ii) 2014 January 17, U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001

Subject:

Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2013 Cooper Nuclear Station, Docket No. 50-298, DPR-46

References:

1. Letter from David Van Der Kamp, Nebraska Public Power District, to U.S. Nuclear Regulatory Commission, dated August 18, 2008, "Failure to Include Error in Emergency Core Cooling System Evaluation Model in Annual Report for 2006"

2. Letter from David Van Der Kamp, Nebraska Public Power District, to U.S. Nuclear Regulatory Commission, dated September 21, 2011, "10 CFR 50.46(a)(3)(ii) Report"

3. Letter from David Van Der Kamp, Nebraska Public Power District, to U.S. Nuclear Regulatory Commission, dated January 14, 2013, "Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2012"

Dear Sir or Madam:

The purpose of this letter is to submit the 2013 annual report of changes or errors in the Emergency Core Cooling System (ECCS) Evaluation Models pursuant to 10 CFR 50.46(a)(3)(ii) for Cooper Nuclear Station (CNS).

By reference letters 1 through 3, Nebraska Public Power District previously reported errors in the ECCS evaluation models for GE14 and GNF2 fuel. These errors continue to apply to the ECCS evaluation methodologies for 2013 and have a cumulative impact of 145°F on the Peak Cladding Temperature (PCT) for GE14 fuel and 30'F for GNF2 fuel. There were no errors reported for GE14 or GNF2 fuel in 2013. The errors/changes reported by General Electric Hitachi result in a PCT of 2185°F for GE14 fuel and 2170'F for GNF2 fuel.

All changes/errors are itemized in the attachment to this letter. CNS continues to comply with the PCT limit of 2200'F specified in 10 CFR 50.46(b)(1) for both GE14 and GNF2 fuel types.

COOPER NUCLEAR STATION A P.O. Box 98 / Brownville, NE 68321-0098 Telephone: (402) 825-3811 / Fax: (402) 825-5211 www.nppd.com

NLS2014009 Page 2 of 2 This letter makes no regulatory commitments.

If you have any questions regarding this report, please contact Jeremy Custer, Reactor and Fuels Engineering Supervisor, at (402) 825-5653.

Sincerely, David W. Van Der Kamp Licensing Manager

/lb Attachment - Changes/Errors in Emergency Core Cooling System Evaluation Models for 2013 cc: Regional Administrator w/attachment USNRC - Region IV Cooper Project Manager w/attachment USNRC - NRR Project Directorate IV-1 Senior Resident Inspector w/attachment USNRC - CNS NPG Distribution w/attachment CNS Records w/attachment

NLS2014009 Attachment Page 1 of I Changes/Errors in Emergency Core Cooling System Evaluation Models for 2013 Nebraska Public Power District - Cooper Nuclear Station GE14 Fuel GE Hitachi Date Subject PCT Impact 10 CFR 50.46 (OF)

Notification Letter 2006-01 7/28/06 Impact of Top Peaked Power 00 F Shape for Small Break Loss of Coolant Accident Analysis 2011-02 9/2/11 Impact of Database Error for Heat 350 F Deposition on the Peak Cladding Temperature (PCT) for lOx 10 Fuel Bundles 2011-03 9/2/11 Impact of Updated Formulation 95 0 F for Gamma Heat Deposition to Channel Wall for 9x9 and IOx 10 Fuel Bundles 2012-01 11/29/12 PRIME Fuel Properties 150 F Implementation for Fuel Rod Thermal/Mechanical Performance, Replacing GESTR Fuel Properties Total = 145°F PCT at beginning of 2013 = 2185°F PCT at end of 2013 = 2185°F GNF2 Fuel GE Hitachi Date Subject PCT Impact 10 CFR 50.46 (OF)

Notification Letter 2012-01 11/29/12 PRIME Fuel Properties 30°F Implementation for Fuel Rod Thermal/Mechanical Performance, Replacing GESTR Fuel Properties Total = 30°F PCT at beginning of 2013 = 2170OF PCT at end of 2013 = 2170 °F