ML073180505
| ML073180505 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 11/19/2007 |
| From: | Thomas Wengert NRC/NRR/ADRO/DORL/LPLIII-2 |
| To: | Bezilla M FirstEnergy Nuclear Operating Co |
| Wengert, Thomas NRR/DORL 415-4037 | |
| References | |
| TAC MD5240 | |
| Download: ML073180505 (5) | |
Text
November 19, 2007 Mr. Mark B. Bezilla Site Vice President FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station Mail Stop A-DB-3080 5501 North State Route 2 Oak Harbor, OH 43449-9760
SUBJECT:
DAVIS-BESSE NUCLEAR POWER STATION, UNIT NO. 1 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE LICENSE AMENDMENT REQUEST (TAC MD5240)
Dear Mr. Bezilla:
By letter to the Nuclear Regulatory Commission (NRC) dated April 12, 2007, as supplemented by letters dated September 18, October 3, and October 19, 2007, FirstEnergy Nuclear Operating Company submitted a request to make the operating license and technical specification changes necessary to allow an increase of approximately 1.63 percent in the rated thermal output, for the Davis-Besse Nuclear Power Station, Unit No. 1.
The NRC staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter.
The NRC staff considers that timely responses to requests for additional information help ensure sufficient time is available for staff review and contribute toward the NRCs goal of efficient and effective use of staff resources. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-4037.
Sincerely,
/RA/
Thomas J. Wengert, Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-346
Enclosure:
Request for Additional Information cc w/encl: See next page
November 19, 2007 Mr. Mark B. Bezilla Site Vice President FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station Mail Stop A-DB-3080 5501 North State Route 2 Oak Harbor, OH 43449-9760
SUBJECT:
DAVIS-BESSE NUCLEAR POWER STATION, UNIT NO. 1 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE LICENSE AMENDMENT REQUEST (TAC MD5240)
Dear Mr. Bezilla:
By letter to the Nuclear Regulatory Commission (NRC) dated April 12, 2007, as supplemented by letters dated September 18, October 3, and October 19, 2007, FirstEnergy Nuclear Operating Company submitted a request to make the operating license and technical specification changes necessary to allow an increase of approximately 1.63 percent in the rated thermal output, for the Davis-Besse Nuclear Power Station, Unit No. 1.
The NRC staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter.
The NRC staff considers that timely responses to requests for additional information help ensure sufficient time is available for staff review and contribute toward the NRCs goal of efficient and effective use of staff resources. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-4037.
Sincerely,
/RA/
Thomas J. Wengert, Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-346
Enclosure:
Request for Additional Information cc w/encl: See next page DISTRIBUTION:
PUBLIC LPL3-2 R/F RidsNrrDorlLpl3-2 RidsNrrDssSpwb RidsNrrPMTWengert RidsNrrLAEWhitt RidsAcrsAcnwMailCenter RidsOgcRp RidsRgn3MailCenter RidsNrrDorlDpr WLyon, NRR ADAMS Accession Number: ML073180505 OFFICE LPL3-2/PM LPL3-2/LA DSS/SRXB/BC LPL3-2/BC NAME TWengert EWhitt GCranston RGibbs DATE 11/19/07 11/19/07 11/19/07 11/19/07 OFFICIAL RECORD COPY
Davis-Besse Nuclear Power Station, Unit No. 1 cc:
Manager, Site Regulatory Compliance FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station Mail Stop A-DB-3065 5501 North State Route 2 Oak Harbor, OH 43449-9760 Director, Ohio Department of Commerce Division of Industrial Compliance Bureau of Operations & Maintenance 6606 Tussing Road P.O. Box 4009 Reynoldsburg, OH 43068-9009 Resident Inspector U.S. Nuclear Regulatory Commission 5503 North State Route 2 Oak Harbor, OH 43449-9760 Stephen Helmer Supervisor, Technical Support Section Bureau of Radiation Protection Ohio Department of Health 35 East Chestnut Street, 7th Floor Columbus, OH 43215 Carol O=Claire, Chief, Radiological Branch Ohio Emergency Management Agency 2855 West Dublin Granville Road Columbus, OH 43235-2206 Zack A. Clayton DERR Ohio Environmental Protection Agency P.O. Box 1049 Columbus, OH 43266-0149 State of Ohio Public Utilities Commission 180 East Broad Street Columbus, OH 43266-0573 Attorney General Office of Attorney General 30 East Broad Street Columbus, OH 43216 President, Board of County Commissioners of Ottawa County Port Clinton, OH 43252 President, Board of County Commissioners of Lucas County One Government Center, Suite 800 Toledo, OH 43604-6506 The Honorable Dennis J. Kucinich United States House of Representatives Washington, D.C. 20515 The Honorable Dennis J. Kucinich United States House of Representatives 14400 Detroit Avenue Lakewood, OH 44107 Joseph J. Hagan President and Chief Nuclear Officer FirstEnergy Nuclear Operating Company Mail Stop A-GO-14 76 South Main Street Akron, OH 44308 David W. Jenkins, Attorney FirstEnergy Corporation Mail Stop A-GO-15 76 South Main Street Akron, OH 44308 Danny L. Pace Senior Vice President, Fleet Engineering FirstEnergy Nuclear Operating Company Mail Stop A-GO-14 76 South Main Street Akron, OH 44308 Manager, Fleet Licensing FirstEnergy Nuclear Operating Company Mail Stop A-GO-2 76 South Main Street Akron, OH 44308
Davis-Besse Nuclear Power Station, Unit No. 1 cc:
Director, Fleet Regulatory Affairs FirstEnergy Nuclear Operating Company Mail Stop A-GO-2 76 South Main Street Akron, OH 44308 Jeannie M. Rinckel Vice President, Fleet Oversight FirstEnergy Nuclear Operating Company Mail Stop A-GO-14 76 South Main Street Akron, OH 44308 Richard Anderson Vice President, Nuclear Support FirstEnergy Nuclear Operating Company Mail Stop A-GO-14 76 South Main Street Akron, OH 44308 James H. Lash Senior Vice President of Operations and Chief Operating Officer FirstEnergy Nuclear Operating Company Mail Stop A-GO-14 76 South Main Street Akron, OH 44308
REQUEST FOR ADDITIONAL INFORMATION DAVIS-BESSE NUCLEAR POWER STATION, UNIT NO. 1 DOCKET NO. 50-346 In reviewing the FirstEnergy Nuclear Operating Company=s (FENOCs) submittal dated April 12, 2007, as supplemented by letters dated September 18, October 3, and October 19, 2007, related to FENOC=s license amendment request (LAR) for measurement uncertainty recapture power uprate, for the Davis-Besse Nuclear Power Station, Unit No. 1 (DBNPS), the NRC staff has determined that the following information is needed in order to complete its review:
- 1.
Provide representative flow profiles from plant operation that can be compared to the Alden Research Laboratory (ARL) test results provided in ER-227 Rev. 1 and the reasons for and implications of differences, if any.
- 2.
Regarding the Attachment 1, Page 16, figure provided in the September 18, 2007, supplement:
- a.
Define the terms in the figure
- b.
Describe the relationship between the information and measured flow rate
- c.
Provide a comparison of the Page 16 information with Table 3 on Page 9 of ER-227 Rev. 1.
- d.
Coverage of Page 16 information versus operating history including from time of initial operation and after transducer replacement
- e.
Provide reason for correspondence between the Aups and downs@ in the Page 16 plots for the two pipes
- 3.
Provide flow profile information before and after transducer replacement.
- 4.
Provide assessment of how transducer replacement and operating history changes affected calibration.
- 5.
Discuss how noise effects perturbed the ARL test results, in comparison with noise effects, when installed in the plant.
- 6.
With respect to Items 1 - 5 above, provide comparison with other plant parameters that vary with power level behavior. The intent is to examine confirmation of CheckPlus indication by use of other plant information.
- 7.
Taking the difference between the first table in Appendix A of ER-227 Rev. 1, the CAL90A Straight Pipe Paths 1-4 and Paths 5-8 for Loop A, give a differential value of 0.37 percent. The next table that covers the CAL90E Horizontal configuration also shows a difference but the difference is reversed. What are the reasons for these differences and how this is consistent with the claimed uncertainty?
- 8.
Provide ER-168 or, alternatively, provide the information pertinent to the Reynolds Number that is summarized in ER-227 Rev.1 Figure 6.
Enclosure