ML051650190

Dresden and Quad Cities, RAI, Amendment Request That Propose to Revise the Pressure and Temperature Limit Curves for 54 Effective full-power Years to Support the 20 Year License Extension

ML051650190
Person / Time
Site:	Dresden, Quad Cities
Issue date:	06/16/2005
From:	Banerjee M NRC/NRR/DLPM/LPD3
To:	Crane C Exelon Generation Co
Banerjee M, NRR/ADPT, 415-2277
References
TAC MC5160, TAC MC5161, TAC MC5162, TAC MC5163
Download: ML051650190 (5)

Text

June 16, 2005 Mr. Christopher M. Crane, President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3, AND QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 - REQUEST FOR AMENDMENTS (TAC NOS. MC5160, MC5161, MC5162 AND MC5163)

Dear Mr. Crane:

Exelon Generation Company, LLC (EGC) submitted an amendment request on November 4, 2004, that proposed to revise the pressure and temperature limit curves for 54 effective full-power years to support the 20 year license extension for both Dresden Nuclear Power Station, Units 2 and 3, and Quad Cities Nuclear Power Station, Units 1 and 2. On March 8, 2005, EGC supplemented this amendment request with additional information in response to questions from the NRC staff. After review of this additional information, in the area of neutron fluence, the staff determined that further information is needed. Additional questions, contained in the enclosed request for additional information (RAI), were provided to your staff via electronic mail on March 30 and May 17, 2005. On April 18 and June 9, 2005, the NRC staff held conference calls with your staff to discuss these RAI questions. We request that you provide a response to the RAI questions within 30 days of receipt of this letter.

Should you or your staff have any questions, please let me know. I can be reached at 301-415-2277 or by e-mail: mxb@nrc.gov.

Sincerely,

/RA/

Maitri Banerjee, Project Manager, Section 2 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-237, 50-249, 50-254, and 50-265

Enclosure:

As stated cc w/encls: See next page

June 16, 2005 Mr. Christopher M. Crane, President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3, AND QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 - REQUEST FOR AMENDMENTS (TAC NOS. MC5160, MC5161, MC5162 AND MC5163)

Dear Mr. Crane:

Exelon Generation Company, LLC (EGC) submitted an amendment request on November 4, 2004, that proposed to revise the pressure and temperature limit curves for 54 effective full-power years to support the 20 year license extension for both Dresden Nuclear Power Station, Units 2 and 3, and Quad Cities Nuclear Power Station, Units 1 and 2. On March 8, 2005, EGC supplemented this amendment request with additional information in response to questions from the NRC staff. After review of this additional information, in the area of neutron fluence, the staff determined that further information is needed. Additional questions, contained in the enclosed request for additional information (RAI), were provided to your staff via electronic mail on March 30 and May 17, 2005. On April 18 and June 9, 2005, the NRC staff held conference calls with your staff to discuss these RAI questions. We request that you provide a response to the RAI questions within 30 days of receipt of this letter.

Should you or your staff have any questions, please let me know. I can be reached at 301-415-2277 or by e-mail: mxb@nrc.gov.

Sincerely,

/RA/

Maitri Banerjee, Project Manager, Section 2 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-237, 50-249, 50-254, and 50-265

Enclosure:

As stated cc w/encls: See next page DISTRIBUTION:

PUBLIC LLois GDick MRing, RIII PD3-2 R/F JNakoski MBanerjee OGC GSuh HNeih PCoates ACRS DLPM DPR ADAMS Accession Number: ML051650190 Nrr-088 OFFICE PM:LPD3-2 LA:LPD3-2 DSSA:SRXB SC:SRXB SC:LPD3-2 NAME MBanerjee PCoates LLois GHsii for GSuh JNakoski DATE 6/15/05 6/15/05 6/16/05 6/16/05 6/16/05 OFFICIAL RECORD COPY

DRESDEN UNITS 2 AND 3 AND QUAD CITIES UNITS 1 AND 2 REQUEST FOR ADDITIONAL INFORMATION - PRESSURE AND TEMPERATURE LIMIT CURVES FOR 54 EFFECTIVE FULL-POWER YEARS Please provide answers to the following questions:

1. Please confirm that Exelon's submittal is neither using nor does it need to use the shroud fluence considerations as discussed in the GE report (attached to the Exelon submittal) and does not intend to gain NRC review and approval of the physical conditions (cracks) of the core shroud, such that the approval of the TS amendment request will not to be taken as defacto approval of the applicable GE methodology without limitations or approval of the core shroud conditions.

2. The original estimate of the peak vessel fluence for 32 EFPYs including the power uprate for Dresden and Quad Cities was 5.1x1017 n/cmsq for all units. On September 10, 2001, in response to an amendment request, we issued a safety evaluation (ADAMS ML012250027) revising the values to 4.4x1017 n/cmsq for Dresden. A similar revision was made to 4.5x1017 n/cmsq for Quad Cities. The current submittal proposes new values of 3.22x1017 n/cmsq for Dresden and 3.21x1017 n/cmsq for Quad Cities. The differences from the original values appear to be significantly beyond the uncertainty accounted for in the GE methodology. Please explain these differences.

3. The following questions relate to the GE report attached to Exelons March 8, 2005 letter:

a. Appendix A, Table A-2: are the values presented also the peak Azimuthal flux?

b. Appendix B, Tables B-1 and B-2: please identify the height associated with these values.

c. Appendix B, Tables B-3 and B-4: please identify the azimuth associated with these values.

d. On page 12, please correct the apparent discrepancy for the EFPY value stated for Cycle 17.

ENCLOSURE

Dresden and Quad Cities Nuclear Power Stations cc:

Site Vice President - Dresden Nuclear Power Station Vice President of Operations - Mid-West Exelon Generation Company, LLC Boiling Water Reactors 6500 N. Dresden Road Exelon Generation Company, LLC Morris, IL 60450-9765 4300 Winfield Road Warrenville, IL 60555 Dresden Nuclear Power Station Plant Manager Exelon Generation Company, LLC Vice President - Licensing and Regulatory 6500 N. Dresden Road Affairs Morris, IL 60450-9765 Exelon Generation Company, LLC 4300 Winfield Road Regulatory Assurance Manager - Dresden Warrenville, IL 60555 Exelon Generation Company, LLC 6500 N. Dresden Road Director - Licensing and Regulatory Morris, IL 60450-9765 Affairs Exelon Generation Company, LLC U.S. Nuclear Regulatory Commission 4300 Winfield Road Dresden Resident Inspectors Office Warrenville, IL 60555 6500 N. Dresden Road Morris, IL 60450-9766 Associate General Counsel Exelon Generation Company, LLC Chairman 4300 Winfield Road Grundy County Board Warrenville, IL 60555 Administration Building 1320 Union Street Manager Licensing - Dresden, Morris, IL 60450 Quad Cities and Clinton Exelon Generation Company, LLC Regional Administrator 4300 Winfield Road U.S. NRC, Region III Warrenville, IL 60555 801 Warrenville Road Lisle, IL 60532-4351 Site Vice President - Quad Cities Nuclear Power Station Illinois Emergency Management Exelon Generation Company, LLC Agency 22710 206th Avenue N.

Division of Disaster Assistance & Cordova, IL 61242-9740 Preparedness 110 East Adams Street Quad Cities Nuclear Power Station Springfield, IL 62701-1109 Plant Manager Exelon Generation Company, LLC Document Control Desk - Licensing 22710 206th Avenue N.

Exelon Generation Company, LLC Cordova, IL 61242-9740 4300 Winfield Road Warrenville, IL 60555 Senior Vice President - Nuclear Services Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

Dresden and Quad Cities Nuclear Power Stations cc:

Regulatory Assurance Manager - Quad Cities Exelon Generation Company, LLC 22710 206th Avenue N.

Cordova, IL 61242-9740 Quad Cities Resident Inspectors Office U.S. Nuclear Regulatory Commission 22712 206th Avenue N.

Cordova, IL 61242 David C. Tubbs MidAmerican Energy Company One River Center Place 106 E. Second, P.O. Box 4350 Davenport, IA 52808-4350 Vice President - Law and Regulatory Affairs MidAmerican Energy Company One River Center Place 106 E. Second Street P.O. Box 4350 Davenport, IA 52808 Chairman Rock Island County Board of Supervisors 1504 3rd Avenue Rock Island County Office Bldg.

Rock Island, IL 61201