ML040150056
| ML040150056 | |
| Person / Time | |
|---|---|
| Site: | Kewaunee  |
| Issue date: | 01/26/2004 |
| From: | John Lamb NRC/NRR/DLPM/LPD3 |
| To: | Coutu T Nuclear Management Co |
| References | |
| TAC MC1049 | |
| Download: ML040150056 (5) | |
Text
January 26, 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, the Nuclear Management Company, LLC (NMC or the licensee) submitted a request for a proposed amendment to revise the Kewaunee Nuclear Power Plant (KNPP) 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, submittal and the KNPP 2003 Inservice Inspection Summary Report.
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 December 30, 2003.
A phone call was held between G. Riste (NMC) and myself on January 13, 2004, to discuss the e-mail sent on December 30, 2003, to ensure that there was no misunderstanding.
Also, the phone call on January 13, 2004, established that February 28, 2004, 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
ML040150056 OFFICE PDIII-1/PM PDIII-1/LA PDIII-1/SC NAME JLamb THarris DHood for LRaghavan DATE 01/22/04 01/21/04 01/23/04
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION (RAI)
REGARDING PROPOSED AMENDMENT REQUEST TO MODIFY STEAM GENERATOR TUBE INSPECTION FREQUENCY KEWAUNEE NUCLEAR POWER PLANT DOCKET NO. 50-305 1.
A number of manufacturing related signals were reported during the 2003 inservice inspection and during the preservice inspection. Please compare the 2003 inspection results to the preservice inspection results. Please explain the reason for any significant change in the signals and discuss the effect on tube integrity for the operating interval between inspections. Your response should include, but not be limited to the following:
a.
In Attachment 8 to your letter dated August 6, 2003, (ADAMS Accession No. ML032250165), you indicated that Nuclear Management Company detected two free-span indications. These indications either could not be detected in the preservice inspection or showed a change since the preservice inspection.
Please discuss whether the indications are new and/or changing. In addition, please discuss what is causing these indications to develop and/or change (i.e.,
could these indications affect tube integrity or be more susceptible to corrosion).
b.
In Attachment 8 to your letter dated August 6, 2003, you indicated that a total of 30 dings and 8 dents signals were found. Were these indications present since the baseline inspection? If so, have they changed and why? If not, provide details explaining what is causing these indications and what is the possible effect on tube integrity for the operating interval between inspections.
c.
In Attachment 8 to your letter dated August 6, 2003, you indicated that a total of 2 bulges signals on steam generator (SG) B were found. Were these indications present since the preservice inspection? If so, have they changed and why? If not, provide details explaining what is causing these indications and what is the possible effect on tube integrity.
2.
In Attachment 2 to your letter dated December 15, 2003, regarding the stretch power uprate, you stated that an evaluation was performed to address the size and location of the specific loose parts that were left in service during the 2003 outage. You also stated that the results from the evaluation of the loose part show that the minimum time to reach the minimum allowable tube wall thickness at uprated power conditions is 43 months. Given the potential uncertainties in the analysis of loose parts, discuss the conservatisms in the analysis, and provide a qualitative assessment of the significance of the conservatisms (e.g., could these significantly lengthen the amount of time to reach the minimum allowable wall thickness). For example, were the loose parts left in service in 2003 in the high flow regions or were they in the low flow regions?
3.
Please clarify what will be required by the technical specification if the next inspection is classified as C-2 or C-3. For example, would Nuclear Regulatory Commission (NRC) approval be required for a 40-month inspection interval? If not, please modify the proposed wording such that if the next inspection is not C-1, NRC approval would be required to continue 40-month inspection intervals.
4.
Please provide the following general information concerning your SGs:
a.
Designer/ Manufacturer b.
Tube manufacturer c.
Schematic illustrating tube supports including naming conventions d.
Tubesheet map e.
Tube pitch (i.e., 1.1-inch triangular)
Kewaunee Nuclear Power Plant cc:
John Paul Cowan Executive Vice President &
Chief Nuclear Officer Nuclear Management Company, LLC 700 First Street Hudson, MI 54016 James McCarthy Plant Manager Kewaunee Nuclear Power Plant N490 Highway 42 Kewaunee, WI 54216-9511 Gerry Riste Manager, Regulatory Affairs Kewaunee Nuclear Power Plant N490 Highway 42 Kewaunee, WI 54216-9511 David Molzahn Nuclear Asset Manager Wisconsin Public Service Corporation 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 Jonathan Rogoff Vice President, Counsel & Secretary Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Larry L. Weyers Chairman, President and CEO Wisconsin Public Service Corporation 600 North Adams Street Greey Bay, WI 54307-9002 David Zellner Chairman - Town of Carlton N2164 County B Kewaunee, WI 54216 Mr. Jeffery Kitsembel Electric Division Public Service Commission of Wisconsin PO Box 7854 Madison, WI 53707-7854