ML062190235

Letter, Steam Generator Tube

ML062190235
Person / Time
Site:	Point Beach
Issue date:	08/30/2006
From:	Lyon C NRC/NRR/ADRO/DORL/LPLIII-1
To:	Koehl D Nuclear Management Co
F. Lyon LPLE X2296
References
TAC MD2042
Download: ML062190235 (4)

Text

August 30, 2006 Mr. Dennis L. Koehl Site Vice President Point Beach Nuclear Plant Nuclear Management Company, LLC 6610 Nuclear Road Two Rivers, WI 54241-9516

SUBJECT:

POINT BEACH NUCLEAR PLANT, UNIT 1 - REVIEW OF THE FALL 2005 STEAM GENERATOR TUBE INSPECTION REPORT (TAC NO. MD2042)

Dear Mr. Koehl:

By letter to the U.S. Nuclear Regulatory Commission (NRC) dated February 21, 2006, as supplemented July 14, 2006, Nuclear Management Company, LLC, submitted its inspection report for the fall 2005 refueling outage (U1R29) for the steam generator tube inspections at Point Beach Nuclear Plant, Unit 1. Your report was submitted in accordance with Technical Specification (TS) 5.6.8, "Steam Generator Tube Inspection Report."

Based on its review, the NRC staff concludes that you have provided the information required by TS 5.6.8. In addition, the NRC staff concludes that there are no technical issues that warrant follow-up action at this time, since the inspections appear to be consistent with the objective of detecting potential tube degradation and the inspection results appear to be consistent with industry operating experience at similarly designed and operated units. A summary of the NRC staff's review is enclosed. If you have any questions regarding this matter, please contact me at (301) 415-2296.

Sincerely,

/RA/

Carl F. Lyon, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-266

Enclosure:

Steam Generator Tube Inspection Report cc w/encl: See next page

Mr. Dennis L. Koehl August 30, 2006 Site Vice President Point Beach Nuclear Plant Nuclear Management Company, LLC 6610 Nuclear Road Two Rivers, WI 54241-9516

SUBJECT:

POINT BEACH NUCLEAR PLANT, UNIT 1 - REVIEW OF THE FALL 2005 STEAM GENERATOR TUBE INSPECTION REPORT (TAC NO. MD2042)

Dear Mr. Koehl:

By letter to the U.S. Nuclear Regulatory Commission (NRC) dated February 21, 2006, as supplemented July 14, 2006, Nuclear Management Company, LLC, submitted its inspection report for the fall 2005 refueling outage (U1R29) for the steam generator tube inspections at Point Beach Nuclear Plant, Unit 1. Your report was submitted in accordance with Technical Specification (TS) 5.6.8, "Steam Generator Tube Inspection Report."

Based on its review, the NRC staff concludes that you have provided the information required by TS 5.6.8. In addition, the NRC staff concludes that there are no technical issues that warrant follow-up action at this time, since the inspections appear to be consistent with the objective of detecting potential tube degradation and the inspection results appear to be consistent with industry operating experience at similarly designed and operated units. A summary of the NRC staff's review is enclosed. If you have any questions regarding this matter, please contact me at (301) 415-2296.

Sincerely,

/RA/

Carl F. Lyon, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-266

Enclosure:

Steam Generator Tube Inspection Report cc w/encl: See next page DISTRIBUTION:

PUBLIC LPL3-1 R/F RidsNrrDorlLpl3-1 RidsNRRPMFLyon RidsNrrLADClarke RidsAcrsAcnwMailCenter RidsRgn3MailCenter RidsNrrDorlDpr LMiller, NRR RidsNrrDciCsgb KKarwoski, NRR ADAMS Accession Number: ML062190235 *SE dated 8/3/06 OFFICE LPLIII-1/PM LPLIII-1/LA DCI/CSGB/BC LPLIII-1/BC(A)

NAME FLyon:ca DClarke AHiser* MMurphy DATE 8/30/06 8/30/06 8/3/06 8/30/06 OFFICIAL RECORD COPY

SUMMARY

OF THE REVIEW OF THE FALL 2005 REFUELING OUTAGE 29 STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT NUCLEAR MANAGEMENT COMPANY, LLC POINT BEACH NUCLEAR PLANT, UNIT 1 DOCKET NO. 50-266 By letter to the Nuclear Regulatory Commission (NRC) dated February 21, 2006 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML060600189), Nuclear Management Company, LLC (the licensee), submitted the annual steam generator (SG) tube inspection report for Point Beach Nuclear Plant (PBNP), Unit 1, for Refueling Outage (RFO) 29, in accordance with Technical Specification (TS) 5.6.8, "Steam Generator Tube Inspection Report." Additional information was provided by the licensee in a letter dated July 14, 2006 (ADAMS Accession No. ML061980407).

PBNP, Unit 1 has two Westinghouse model 44F SGs. Each SG has 3,214 thermally-treated Alloy 600 tubes with an outside diameter of 0.875 inch and a nominal wall thickness of 0.050 inch. The tubes are hydraulically expanded for the full depth of the tubesheet at each end. The tubes are supported by stainless steel support plates with quatrefoil-shaped holes and V-shaped anti-vibration bars. The SG tubes are arranged in a square pattern with a tube spacing of approximately 1.2 inches.

The licensee provided the scope, extent, methods, and results of the PBNP, Unit 1 SG tube inspections in the documents referenced above. In addition, the licensee described corrective actions (i.e., tube plugging) taken in response to the inspection findings.

The NRC staff has the following notes/observations as a result of reviewing the aforementioned submittals.

• Scale samples from SG A taken during RFO 29, indicated a copper content of approximately 16 percent (weight-percent). Copper in SGs can affect the eddy current data quality. The licensee plans to perform chemical cleaning in 2008.

• The licensee reported that the size of dents/dings has increased by less than 5 percent since the 2001 inspections. In addition, the licensee concluded that the dents/dings are not service induced since the number of dents/dings has not significantly increased and most of the dents/dings can be traced to prior inspections.

Based on its review, the NRC staff concludes that the licensee provided the information required by TS 5.6.8. In addition, the NRC staff concludes that there are no technical issues that warrant follow-up action at this time, since the inspections appear to be consistent with the objective of detecting potential tube degradation and the inspection results appear to be consistent with industry operating experience at similarly designed and operated units.

ENCLOSURE

Point Beach Nuclear Plant, Units 1 and 2 cc:

Jonathan Rogoff, Esquire Mr. Jeffery Kitsembel Vice President, Counsel & Secretary Electric Division Nuclear Management Company, LLC Public Service Commission of Wisconsin 700 First Street P.O. Box 7854 Hudson, WI 54016 Madison, WI 53707-7854 Mr. F. D. Kuester Nuclear Asset Manager President & Chief Executive Officer Wisconsin Electric Power Company WE Generation 231 West Michigan Street 231 West Michigan Street Milwaukee, WI 53201 Milwaukee, WI 53201 Michael B. Sellman Regulatory Affairs Manager President and Chief Executive Officer Point Beach Nuclear Plant Nuclear Management Company, LLC Nuclear Management Company, LLC 700 First Street 6610 Nuclear Road Hudson, MI 54016 Two Rivers, WI 54241 Douglas E. Cooper Mr. Ken Duveneck Senior Vice President - Group Operations Town Chairman Palisades Nuclear Plant Town of Two Creeks Nuclear Management Company, LLC 13017 State Highway 42 27780 Blue Star Memorial Highway Mishicot, WI 54228 Covert, MI 49043 Chairman Site Director of Operations Public Service Commission Nuclear Management Company, LLC of Wisconsin 6610 Nuclear Road P.O. Box 7854 Two Rivers, WI 54241 Madison, WI 53707-7854 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351 Resident Inspector's Office U.S. Nuclear Regulatory Commission 6612 Nuclear Road Two Rivers, WI 54241