ML111040089

Correction Letter for Limerick Generating Station, Units 1 and 2 - Safety Evaluation Regarding Measurement Uncertainty Recapture Power Uprate and Standby Liquid Control System Changes

ML111040089
Person / Time
Site:	Limerick
Issue date:	04/20/2011
From:	Peter Bamford Plant Licensing Branch 1
To:	Pacilio M Exelon Nuclear
Bamford, Peter J., NRR/DORL 415-2833
References
TAC ME3589, TAC ME3590, TAC ME3591, TAC ME3592
Download: ML111040089 (2)

Text

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• • • • i' Mr. Michael J. Pacilio President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 SUB..IECT: CORRECTION LETTER FOR LIMERICK GENERATING STATION, UNITS 1 AND 2 - SAFETY EVALUATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE AND STANDBY LIQUID CONTROL SYSTEM CHANGES (TAC NOS. ME3589, ME3590, ME3591, AND ME3592)

Dear Mr. Pacilio:

By letter dated April 8, 2011 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML110691095), the U.S. Nuclear Regulatory Commission (NRC) issued Amendment No. 201 to Facility Operating License No. NPF-39 and Amendment No. 163 to Facility Operating License No. NPF-85 for Limerick Generating Station (LGS), Units 1 and 2, respectively. The safety evaluation enclosed with the amendments contains two errors that are being acknowledged and corrected by this letter.

First, on page 30 of the safety evaluation, the first paragraph, second sentence, starts with "As noted in Section 2.2.2 above ... " This reference to Section 2.2.2 of the safety evaluation should have been to Section 3.9.2. Second, on page 40 of the safety evaluation, the last full paragraph states that "Installation locations are downstream of the flow straighteners and upstream of the existing feedwater flow nozzle." This is true only for the installation locations of the new Leading Edge Flow Meters (LEFMs) in Loops "B" and "C" for each unit. The loop "A" LEFM location is upstream of both the flow straightener and the feedwater flow nozzle for each unit. The correct location is acknowledged elsewhere in the safety evaluation, specifically earlier on page 40, in the first bulleted paragraph on that page, as well as on page 21, Section 3.7.2. Neither of these errors has any bearing on the NRC staff's technical evaluation or conclusions.

Please contact me at 301-415-2833 if you have any questions.

Sincerely, Peter Bamford, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353 cc: Distribution via Listserv

April 20,2011 Mr. Michael J. Pacilio President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

CORRECTION LETTER FOR LIMERICK GENERATING STATION, UNITS 1 AND 2 - SAFETY EVALUATION REGARDING MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE AND STANDBY LIQUID CONTROL SYSTEM CHANGES (TAC NOS. ME3589, ME3590, ME3591, AND ME3592)

Dear Mr. Pacilio:

By letter dated April 8, 2011 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML110691095), the U.S. Nuclear Regulatory Commission (NRC) issued Amendment No. 201 to Facility Operating License No. NPF-39 and Amendment No. 163 to Facility Operating License No. NPF-85 for Limerick Generating Station (LGS), Units 1 and 2, respectively. The safety evaluation enclosed with the amendments contains two errors that are being acknowledged and corrected by this letter.

First, on page 30 of the safety evaluation, the first paragraph, second sentence, starts with "As noted in Section 2.2.2 above ... " This reference to Section 2.2.2 of the safety evaluation should have been to Section 3.9.2. Second, on page 40 of the safety evaluation, the last full paragraph states that "Installation locations are downstream of the flow straighteners and upstream of the existing feedwater flow nozzle." This is true only for the installation locations of the new Leading Edge Flow Meters (LEFMs) in Loops "B" and "C" for each unit. The loop "A" LEFM location is upstream of both the flow straightener and the feedwater flow nozzle for each unit. The correct location is acknowledged elsewhere in the safety evaluation, specifically earlier on page 40, in the first bulleted paragraph on that page, as well as on page 21, Section 3.7.2. Neither of these errors has any bearing on the NRC staffs technical evaluation or conclusions.

Please contact me at 301-415-2833 if you have any questions.

Sincerely, Ira!

Peter Bamford, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353 cc: Distribution via Listserv DISTRIBUTION:

PUBLIC RidsOgcRp Resource LPLI-2 R/F RidsAcrsAcnw_MailCTR Resource RidsNrrDorlLpl1-2 Resouce RidsNrrDorlDpr Resource RidsRgn 1MailCenter Resource RidsNrrLAABaxter Resource RidsNrrPMLimerick Resource ADAMS Accession Number: ML111040089 *via email OFFICE LPLI-2/PM LPLI-2/LA LPL1-2/BC

! NAME PBamford ABaxter .. HChernoff DATE 04114/2011 04/18/2011 04/20/2011 OFFICIAL RECORD COPY