NLS2010009, Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2009

Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2009

ML100220456
Person / Time
Site:	Cooper
Issue date:	01/14/2010
From:	Vanderkamp D Nebraska Public Power District (NPPD)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NLS2010009
Download: ML100220456 (3)

Text

N Nebraska Public Power District

'Always there when you need us" 50.46(a)(3)(ii)

NLS2010009 January 14, 2010 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001

Subject:

Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2009 Cooper Nuclear Station, Docket No. 50-298, DPR-46

Reference:

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"

Dear Sir or Madam:

The purpose of this letter is to submit the 2009 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 the Reference letter dated August 18, 2008, the Nebraska Public Power District reported an error in an acceptable ECCS evaluation model reported by Global Nuclear Fuel in 2006.

The nature of the error is discussed in a General Electric Hitachi proprietary document that was previously provided to the Nuclear Regulatory Commission with the Reference letter.

This error involved a 00F change in the value of the Peak Clad Temperature (PCT). This same error continues to apply to the ECCS evaluation methodology for 2009. No reanalysis is planned at this time as the error is not significant. No other changes or errors in the ECCS evaluation methodology were identified during 2009 and the PCT remains as 2040'F. CNS continues to comply with the PCT limit of 2200'F specified in 10 CFR 50.46(b)(1).

If you have any questions regarding this report, please contact Kent Sutton, Nuclear Engineering Department Manager, at (402) 825-5105.

Sincerely, David W. Van Der Kamp Licensing Manager COOPER NUCLEAR STATION P.O. Box 98 / Brownville, NE 68321-0098 Telephone: (402).825-3811 / Fax: (402) 825-5211 ww vnppd.com

NLS2010009 Page 2 of 2

/lb cc: Regional Administrator USNRC - Region IV Cooper Project Manager USNRC - NRR Project Directorate IV-1 Senior Resident Inspector USNRC - CNS CNS Records NPG Distribution

ATTACHMENT 3 LIST OF REGULATORY COMMITMENTSC 4 4

ATTACHMENT3 LIST OF REGULATORY COMMITMENTSN Correspondence Number: NLS2010009 The following table identifies those actions committed to by Nebraska Public Power District (NPPD) in this document. Any other actions discussed in the submittal represent intended or planned actions by NPPD. They are described for information only and are not regulatory commitments. Please notify the Licensing Manager at Cooper Nuclear Station of any questions regarding this document or any associated regulatory commitments.

COMMITMENT COMMITTED DATE COMMITMENT NUMBER OR OUTAGE None

_______ .1 ___ 1. ___

4 4.

-t 4-4- .9.

I PROCEDURE 0.42 REVISION 24 PAGE 18 OF 25