ML13226A154

Request for Additional Information Regarding Core Operating Limits Report for Cycle 21

ML13226A154
Person / Time
Site:	Catawba
Issue date:	08/20/2013
From:	Jason Paige Plant Licensing Branch II
To:	Henderson K Duke Energy Carolinas
Paige J, NRR/DORL 415-5888
References
TAC MF1777
Download: ML13226A154 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 August 20, 2013 Mr. K. Henderson Site Vice President Catawba Nuclear Station Duke Energy Carolinas, LLC 4800 Concord Road York, SC 29745

SUBJECT:

CATAWBA NUCLEAR STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION REGARDING CORE OPERATING LIMITS REPORT FOR CYCLE 21 (TAC NO. MF1777)

Dear Mr. Henderson:

By letter dated April 30, 2013, Duke Energy Carolinas, LLC (Duke, the licensee), submitted its Catawba Nuclear Station, Unit 1, Cycle 21, Core Operating Limits Report, pursuant to Technical Specification 5.6.5.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete our review. The enclosed document describes this request for additional information (RAt). On July 30,2013, the Duke staff indicated that a response to the RAt would be provided within 60 days of the date of this tetter.

If you have any questions, please call me at 301 888.

ason C. Paige, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-413

Enclosure:

Request for Additional Information cc wfencl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REGARDING CORE OPERATING LIMITS REPORT FOR CYCLE 21 CATAWBA NUCLEAR STATION. UNIT 1 By letter dated April 30, 2013, Duke Energy Carolinas, LLC (Duke, the licensee), submitted its Catawba Nuclear Station, Unit 1, Cycle 21, Core Operating Limits Report (COLR), pursuant to Technical Specification (TS) 5.6.5.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal and determined that the following additional information is needed in order to complete our review:

1. The analytical methods used to determine core operating limits for parameters identified in TS come from methodologies approved by the NRC. The approved methodologies used by Catawba are listed in Section 1.1 of the COLR. Please list which of these approved methodologies is used to determine each operating limit in Section 2.0.

2. In the COLR for Catawba Nuclear Station, Unit 1, Cycle 20 dated April 2011 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML11168A068), an exception was given under Shutdown Bank Insertion Limits in Section 2.4. The exception states:

Shutdown banks may be inserted to 219 steps withdrawn individually for up to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> provided the plant was operated in steady state conditions near 100% FP

[full power] prior to and during this exception.

Describe why this exception was eliminated for the Cycle 21 COLR.

3. In the COLR for Catawba Nuclear Station, Unit 1, Cycle 20, an exception was given under Control Bank Insertion Limits in Section 2.5. The exception states:

Control banks A, B, or C may be inserted to 219 steps withdrawn individually for up to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> provided the plant was operated in steady state conditions near 100% FP prior to and during this exception.

Describe why this exception was eliminated for the Cycle 21 COLR.

Enclosure

August 20, 2013 Mr. K. Henderson Site Vice President Catawba Nuclear Station Duke Energy Carolinas, LLC 4800 Concord Road York, SC 29745

SUBJECT:

CATAWBA NUCLEAR STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION REGARDING CORE OPERATING LIMITS REPORT FOR CYCLE 21 (TAC NO. MF1777)

Dear Mr. Henderson:

By letter dated April 30,2013, Duke Energy Carolinas, LLC (Duke, the licensee), submitted its Catawba Nuclear Station, Unit 1, Cycle 21, Core Operating Limits Report, pursuant to Technical Specification 5.6.5.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete our review. The enclosed document describes this request for additional information (RAI). On July 30, 2013, the Duke staff indicated that a response to the RAI would be provided within 60 days of the date of this letter.

If you have any questions, please call me at 301-415-5888.

Sincerely, IRA!

Jason C. Paige, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-413

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:

Public LPL2-1 RlF RidsAcrsAcnw_MailCTR Resource RidsNrrDorlLpl2-1 Resource RidsNrrDssSrxb Resource RidsNrrPMCatawbaResource (hard copy)

RidsNrrLASFigueroa Resource RidsRgn2MailCenter Resource ADAMS Accession No.: ML13226A154 OFFICE INRRlLPL2-1/PM NRRlLPL2-1/LA N RRlLPL2-1/BC NRRlLPL2-1/PM NAME JPaige SFigueroa RPascarelli JPaige DATE 08/19/13 !08/15/13 08119113 08/19/13 OFFICIAL RECORD COpy