ML040890855

Request for Additionai Information Re Proposed Amendment Request Steam Generator Eddy Current Inspection Frequency Extension:

ML040890855
Person / Time
Site:	Kewaunee
Issue date:	04/06/2004
From:	John Lamb NRC/NRR/DLPM/LPD3
To:	Coutu T Nuclear Management Co
References
TAC MC1049
Download: ML040890855 (5)

Text

April 6, 2004 Mr. Thomas Coutu Site Vice President Kewaunee Nuclear Power Plant Nuclear Management Company, LLC N490 State Highway 42 Kewaunee, WI 54216

SUBJECT:

KEWAUNEE NUCLEAR POWER PLANT - REQUEST FOR ADDITIONAL INFORMATION FOR PROPOSED AMENDMENT REQUEST, STEAM GENERATOR EDDY CURRENT INSPECTION FREQUENCY EXTENSION (TAC NO. MC1049)

Dear Mr. Coutu:

By letter dated October 8, 2003, as supplemented February 27, 2004, the Nuclear Management Company, LLC (NMC or the licensee) submitted a request for a proposed amendment to revise the Kewaunee Nuclear Power Plant Technical Specifications for changes to the steam generator inservice inspections that would increase the inspection interval.

The Nuclear Regulatory Commission (NRC) staff has reviewed the information NMC provided with the October 8, 2003, application, the February 27, 2004, submittal and the Palo Verde Unit 2 Event Report No. 40533 to the NRC on February 20, 2004, regarding a primary-to-secondary leakage increase in Steam Generator No. 1. This was the first cycle using the steam generators at Palo Verde Unit 2 since the steam generators were replaced in 2003.

Based on the review of these documents, the NRC staff has determined that additional information is required in order to complete the evaluation. The additional information being requested is enclosed.

A draft of the request for additional information was e-mailed to Mr. G. Riste (NMC) on March 9, 2004.

A phone call was held between G. Riste (NMC), T. Olsen (NMC), K. Karwoski (NRC), and myself on March 26, 2004, to discuss the e-mail sent on March 9, 2004, to provide any clarification.

T. Coutu Also, the phone call on March 26, 2004, established that 30 days from the date of the letter would be a mutually agreeable response date. Please contact me at (301) 415-1446 if future circumstances should require a change in this response date.

Sincerely,

/RA/

John G. Lamb, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-305

Enclosure:

Request for Additional Information cc w/encl: See next page

ML040890855 OFFICE PDIII-1/PM PDIII-1/LA PDIII-1/SC NAME JLamb THarris LRaghavan DATE 04/05/04 04/02/04 04/05/04 REQUEST FOR ADDITIONAL INFORMATION (RAI)

REGARDING PROPOSED AMENDMENT REQUEST TO MODIFY STEAM GENERATOR TUBE INSPECTION FREQUENCY KEWAUNEE NUCLEAR POWER PLANT DOCKET NO. 50-305 A primary-to-secondary leak was observed at a plant which recently replaced their steam generators. In reviewing the eddy current data for the leaking tube (both preservice and inservice inspection data), the licensee noticed an anomalous dent signal. Although the leak was attributed to this dent signal, there was no clear indication of a 100-percent through-wall flaw based on the rotating probe data (the leak was attributed to this location based on visual and non-destructive examination data).

Given that your steam generators contain dents/dings, please discuss the potential for a through-wall or near through-wall flaw to exist at these locations (e.g., are there anomalous dent/ding signals). Please discuss your primary-to-secondary leakage history since installation of the steam generators. Please discuss whether the hydrostatic test and/or other pressure tests performed during fabrication would have been able to detect small leaks through the tubes. Please discuss whether any other inspection data could represent through-wall or near through-wall flaws (e.g., do other types of indications exhibit anomalous signals).

ENCLOSURE

Kewaunee Nuclear Power Plant cc:

John Paul Cowan Jonathan Rogoff Executive Vice President & Vice President, Counsel & Secretary Chief Nuclear Officer Nuclear Management Company, LLC Nuclear Management Company, LLC 700 First Street 700 First Street Hudson, WI 54016 Hudson, MI 54016 Larry L. Weyers James McCarthy Chairman, President and CEO Plant Manager Wisconsin Public Service Corporation Kewaunee Nuclear Power Plant 600 North Adams Street N490 Highway 42 Greey Bay, WI 54307-9002 Kewaunee, WI 54216-9511 David Zellner Gerry Riste Chairman - Town of Carlton Manager, Regulatory Affairs N2164 County B Kewaunee Nuclear Power Plant Kewaunee, WI 54216 N490 Highway 42 Kewaunee, WI 54216-9511 Mr. Jeffery Kitsembel Electric Division David Molzahn Public Service Commission of Wisconsin Nuclear Asset Manager PO Box 7854 Wisconsin Public Service Corporation Madison, WI 53707-7854 600 N. Adams Street Green Bay, WI 54307-9002 Thomas Webb Nuclear Asset Manager Wisconsin Public Service Corporation 600 N. Adams Street Green Bay, WI 54307-9002 Resident Inspectors Office U. S. Nuclear Regulatory Commission N490 Hwy 42 Kewaunee, WI 54216-9510 Regional Administrator Region III U. S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532-4351 ENCLOSURE