ML080380170
| ML080380170 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 02/12/2008 |
| From: | Balwant Singal NRC/NRR/ADRO/DORL/LPLIV |
| To: | Muench R Wolf Creek |
| Singal, Balwant, 415-3016, NRR/DORL/LPL4 | |
| References | |
| TAC MD5946 | |
| Download: ML080380170 (4) | |
Text
February 12, 2008 Mr. Rick A. Muench President and Chief Executive Officer Wolf Creek Nuclear Operating Corporation Post Office Box 411 Burlington, KS 66839
SUBJECT:
WOLF CREEK GENERATING STATION - REQUEST FOR ADDITIONAL INFORMATION RE: REVIEW OF RESULTS OF THE 14TH STEAM GENERATOR TUBE INSERVICE INSPECTION (TAC NO. MD5946)
Dear Mr. Muench:
By letter dated March 19, 2007, Wolf Creek Nuclear Operating Corporation (WCNOC) submitted the results of the 2006 steam generator (SG) tube inspection performed at Wolf Creek Generating Station during the 15th refueling outage.
The U.S. Nuclear Regulatory Commission (NRC) staff has determined that the following additional information is required for staff to complete its review:
- 1.
For each refueling outage or SG tube inspection since installation of the SGs, provide the cumulative effective full power months that the SGs have operated.
- 2.
Provide a high-level summary of the results of the scale profiling analysis.
- 3.
Clarify the statement 100% of the U-bends have been inspected during the second inspection period. Does this mean that you were in the 90 effective full power month inspection period listed in your technical specifications? If so, when during the period were the U-bends for the tubes in rows 1 through 4 inspected?
- 4.
Describe the scope and results of any secondary-side inspections.
- 5.
On page 32 of 37 of March 19, 2008, letter, the indication in the tube in row 27, column 97 is listed as being 0.78 inches below the top of the tubesheet. Discuss the source and nature of this indication. Similarly, discuss the source and nature of the indication in the tube in row 21, column 117 which has an indication 0.15 inches below the top of the tubesheet. If attributed to a loose part, discuss whether these tubes were expanded for the full length of the tubesheet (or whether there is a crevice at the top of the tubesheet).
This request for additional information (RAI) was sent to Ms. Diane Hooper of WCNOC via e-mail on February 6, 2008. You are requested to provide your response to the RAI by February 29, 2008.
R. The NRC staff considers that timely responses to RAIs help ensure sufficient time is available for NRC staff to complete its review and contribute toward the NRCs goal of efficient and effective use of staff resources.
Sincerely,
/RA/
Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-482 cc: See next page
- Memo dated February 1, 2008 OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/CSGB/BC NRR/LPL4/BC NAME BSingal JBurkhardt AHiser(*)
THiltz DATE 2/11/08 2/11/08 2/1/08 2/12/08
February 2006 Wolf Creek Generating Station cc:
Jay Silberg, Esq.
Pillsbury Winthrop Shaw Pittman LLP 2300 N Street, NW Washington, D.C. 20037 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 Senior Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 311 Burlington, KS 66839 Chief Engineer, Utilities Division Kansas Corporation Commission 1500 SW Arrowhead Road Topeka, KS 66604-4027 Office of the Governor State of Kansas Topeka, KS 66612 Attorney General 120 S.W. 10th Avenue, 2nd Floor Topeka, KS 66612-1597 County Clerk Coffey County Courthouse 110 South 6th Street Burlington, KS 66839 Chief, Radiation and Asbestos Control Section Kansas Department of Health and Environment Bureau of Air and Radiation 1000 SW Jackson, Suite 310 Topeka, KS 66612-1366 Vice President Operations/Plant Manager Wolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839 Supervisor Licensing Wolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839 U.S. Nuclear Regulatory Commission Resident Inspectors Office/Callaway Plant 8201 NRC Road Steedman, MO 65077-1032