ML070670047
| ML070670047 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 03/19/2007 |
| From: | Williams J NRC/NRR/ADRO/DORL/LPLIII-2 |
| To: | Crane C Exelon Generation Co |
| Williams J, NRR/DLPM/LPD1, 415-1470 | |
| References | |
| TAC MD4008 | |
| Download: ML070670047 (5) | |
Text
March 19, 2007 Mr. Christopher M. Crane President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
QUAD CITIES NUCLEAR POWER STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO PROPOSED CHANGE TO MINIMUM CRITICAL POWER RATIO SAFETY LIMIT (TAC NO. MD4008)
Dear Mr. Crane:
On January 16, 2007, Exelon Generation Company, LLC submitted a letter requesting a change to the minimum critical power ratio safety limit for the Quad Cities Nuclear Power Station, Unit 1. The NRC staff is reviewing this request, and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter.
If you have questions regarding this topic, or if circumstances result in the need to revise the requested response date, please contact me at (301) 415-1470.
Sincerely,
/RA/
Joseph F. Williams, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-254
Enclosure:
Request for Additional Information cc w/encl: See next page
Mr. Christopher M. Crane March 19, 2007 President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
QUAD CITIES NUCLEAR POWER STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO PROPOSED CHANGE TO MINIMUM CRITICAL POWER RATIO SAFETY LIMIT (TAC NO. MD4008)
Dear Mr. Crane:
On January 16, 2007, Exelon Generation Company, LLC submitted a letter requesting a change to the minimum critical power ratio safety limit for the Quad Cities Nuclear Power Station, Unit 1. The NRC staff is reviewing this request, and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter.
If you have questions regarding this topic, or if circumstances result in the need to revise the requested response date, please contact me at (301) 415-1470.
Sincerely,
/RA/
Joseph F. Williams, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-254 and 50-265
Enclosure:
Request for Additional Information cc w/encl: See next page Distribution:
PUBLIC RidsAcrsAcnwMailCenter LPL3-2 R/F RidsRgn3MailCenter RidsNrrDorlLpl3-2 RidsNrrDorlDpr RidsNrrLAEWhitt RidsNrrDssSbwb RidsNrrPMJWilliams BParks RidsOgcRp Accession Number: ML070670047 NRR-088 OFFICE PM:LPL3-2 LA:LPL3-2 BC:LPL3-2 NAME JWilliams:mw EWhitt RGibbs DATE 3/15/07 3/15/07 3/19/07 OFFICIAL RECORD COPY
Quad Cities Nuclear Power Station Units 1 and 2 cc:
Site Vice President - Quad Cities Exelon Generation Company, LLC 22710 206th Avenue N.
Cordova, IL 61242-9740 Plant Manager - Quad Cities Nuclear Power Station Exelon Generation Company, LLC 22710 206th Avenue N.
Cordova, IL 61242-9740 Manager Regulatory Assurance - 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 Regional Administrator, Region III U.S. Nuclear Regulaory Commission Suite 210 4300 Winfield Road Warrenville, IL 60555 Illinois Emergency Management Agency Division of Disaster Assistance &
Preparedness 110 East Adams Street Springfield, IL 62701-1109 Document Control Desk - Licensing Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Senior Vice President - Operations Support Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Director - Licensing and Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President - Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Associate General Counsel Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Manager Licensing - Dresden, Quad Cities and Clinton Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Senior Vice President - Midwest Operations Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
Enclosure REQUEST FOR ADDITIONAL INFORMATION QUAD CITIES NUCLEAR POWER STATION, UNIT 1 DOCKET NO. 50-254 REQUEST FOR TECHNICAL SPECIFICATIONS CHANGE MINIMUM CRITICAL POWER RATIO SAFETY LIMIT FOR CYCLE 20
- 1. Describe how the minimum critical power ratio safety limit (SLMCPR) analysis is conducted for legacy fuel. Discuss the burnup characteristics of modeled fuel type QAG4.
- 2. Fuel vendor documentation identifies a subset of legacy fuel, loaded in potentially limiting positions in the core, that was loaded in cycle 18A. Provide a comparison of predicted exposures of fuel loaded in cycles 18, 18A, and 19 at the start of QC1R20.
- 3. Provide the highest SLMCPR technical specification values for the legacy fuel for Quad Cities Unit 1.
- 4. Model assembly type QAG4 using the USAG14 correlation and provide assembly histograms through 10201 effective full power hours comparing the critical power ratio performance of the QAG4 bundles when modeled using D4.1.1 as compared to USAG14 to show that there is no significant impact of modeling with D4.1.1, which is not explicitly approved to model the lattice geometry contained in fuel assembly QAG4.