ML072410041

Request for Additional Information Related to Measurement Uncertainty Recapture Power Uprate

ML072410041
Person / Time
Site:	Davis Besse
Issue date:	08/31/2007
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: ML072410041 (7)

Text

August 31, 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 (TAC NO. MD5240)

Dear Mr. Bezilla:

By letter to the Nuclear Regulatory Commission (NRC) dated April 12, 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 power 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. During a discussion with your staff on August 28, 2007, it was agreed that you would provide a response within 30 days from the date of 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

Mr. Mark B. Bezilla August 31, 2007 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 (TAC NO. MD5240)

Dear Mr. Bezilla:

By letter to the Nuclear Regulatory Commission (NRC) dated April 12, 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 power 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. During a discussion with your staff on August 28, 2007, it was agreed that you would provide a response within 30 days from the date of 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 RidsNrrPMTWengert RidsNrrLAEWhitt RidsAcrsAcnwMailCenter RidsOgcRp RidsRgn3MailCenter RidsNrrDorlDpr KMartin, NRR IAhmed, NRR RidsNrrDirsIolb RidsNrrDeEicb ADAMS Accession Number: ML072410041 NRR-088 OFFICE LPL3-2/PM LPL3-2/LA LPL3-2/BC NAME TWengert EWhitt RGibbs (THarris for)

DATE 8/31/07 8/31/07 8/31/07 OFFICIAL RECORD COPY

Davis-Besse Nuclear Power Station, Unit No. 1 cc:

Manager, Site Regulatory Compliance President, Board of County FirstEnergy Nuclear Operating Company Commissioners of Ottawa County Davis-Besse Nuclear Power Station Port Clinton, OH 43252 Mail Stop A-DB-3065 5501 North State Route 2 President, Board of County Oak Harbor, OH 43449-9760 Commissioners of Lucas County One Government Center, Suite 800 Director, Ohio Department of Commerce Toledo, OH 43604-6506 Division of Industrial Compliance Bureau of Operations & Maintenance The Honorable Dennis J. Kucinich 6606 Tussing Road United States House of Representatives P.O. Box 4009 Washington, D.C. 20515 Reynoldsburg, OH 43068-9009 The Honorable Dennis J. Kucinich Resident Inspector United States House of Representatives U.S. Nuclear Regulatory Commission 14400 Detroit Avenue 5503 North State Route 2 Lakewood, OH 44107 Oak Harbor, OH 43449-9760 Joseph J. Hagan Stephen Helmer President and Chief Nuclear Officer Supervisor, Technical Support Section FirstEnergy Nuclear Operating Company Bureau of Radiation Protection Mail Stop A-GO-14 Ohio Department of Health 76 South Main Street 35 East Chestnut Street, 7th Floor Akron, OH 44308 Columbus, OH 43215 David W. Jenkins, Attorney Carol OClaire, Chief, Radiological Branch FirstEnergy Corporation Ohio Emergency Management Agency Mail Stop A-GO-15 2855 West Dublin Granville Road 76 South Main Street Columbus, OH 43235-2206 Akron, OH 44308 Zack A. Clayton Danny L. Pace DERR Senior Vice President, Fleet Engineering Ohio Environmental Protection Agency FirstEnergy Nuclear Operating Company P.O. Box 1049 Mail Stop A-GO-14 Columbus, OH 43266-0149 76 South Main Street Akron, OH 44308 State of Ohio Public Utilities Commission Manager, Fleet Licensing 180 East Broad Street FirstEnergy Nuclear Operating Company Columbus, OH 43266-0573 Mail Stop A-GO-2 76 South Main Street Attorney General Akron, OH 44308 Office of Attorney General 30 East Broad Street Columbus, OH 43216

Davis-Besse Nuclear Power Station, Unit 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 PROPOSED MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE DOCKET NO. 50-346 In reviewing the FirstEnergy Nuclear Operating Companys (FENOCs) submittal dated April 12, 2007, related to the license amendment request to increase the maximum power level from 2772 MWt to 2817 MWt, for the Davis-Besse Nuclear Power Station, Unit No. 1, the NRC staff has determined that the following information is needed in order to complete its review. Note that Questions 1 through 4 refer to Section VII of Regulatory Issue Summary (RIS) 2002-03, Guidance on the Content of Measurement Uncertainty Recapture Power Uprate Applications.

1. Operator Actions (RIS 2002-03 Section VII.1)

a. Identify which operator actions will require additional time to perform. Provide the time periods currently required to complete these operator actions and the times that will be required subsequent to the implementation of the proposed measurement uncertainty recapture (MUR) power uprate.

b. Have any available time periods for significant operator actions been reduced for accident scenarios and events, such as anticipated transients without scram, due to the MUR power uprate? If so, describe how the new available times were validated.

2. Emergency and Abnormal Operating Procedures (RIS 2002-03 Section VII.2.A)

a. Describe any changes to operator actions in the emergency operating procedures and abnormal operating procedures required as a result of the MUR power uprate and how these changes will be integrated into the operator training program.

3. Control Room Controls, Displays (Including the Safety Parameter Display System), and Alarms (RIS 2002-03 Section VII.2.B)

a. Identify how much margin the operators will have to maintain the increased power production heat transfer within the prescribed parameters.

b. Describe the changes that will be made to the in-core monitoring system (IMS).

Describe how you have verified that the proposed software changes to the IMS will not have any adverse effects on the operators. Are there potential software changes that could introduce false indications in the control room indicators? Will the plant specific simulator require further modifications to account for the changes that will be made to the plant computer software?

c. The submittal stated that the amount of time the operators must control the cooldown of the reactor coolant system will increase due to the increase of decay heat. Identify the increase in the amount of time that the operators will need to control the cooldown.

d. Describe how the operators will be notified of self-diagnosed errors with the Caldon leading edge flowmeter in the event that the new control room alarm is either inoperable or fails to alert the operators.

4. Control Room Plant Reference Simulator (RIS 2002-03 Section VII.2.C)

a. Describe how the plant simulators fidelity will be verified after the MUR power uprate-related modifications are made.

5. Confirm that the correct calculated value of the flow measurement uncertainty includes uncertainty for the actual location of transducers within the housing as identified in Camaron Customer Information Bulletin 125, Revision 0, dated April 23, 2007.