ML042160582
| ML042160582 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities  |
| Issue date: | 08/10/2004 |
| From: | Banerjee M NRC/NRR/DLPM/LPD3 |
| To: | Crane C Exelon Generation Co, Exelon Nuclear |
| Banerjee M, NRR/ADPT, 415-2277 | |
| References | |
| TAC MB7297, TAC MB7298, TAC MB7299, TAC MB7300 | |
| Download: ML042160582 (4) | |
Text
August 10, 2004 Mr. Christopher M. Crane, President Exelon Nuclear Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 & QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 - REQUEST FOR INFORMATION
- CONCRETE EXPANSION ANCHORS (TAC NOS. MB7297, MB7298, MB7299 AND MB7300)
Dear Mr. Crane:
Our review of your letter dated September 11, 2002, which responded to NRC inspection items related to concrete expansion anchors, has identified the need for additional information. A request for information was sent to Mr. Ken Nicely of Exelon via an e-mail on March 25, 2004.
However, no response has been received as of this date. The request for information is enclosed. Based on my telephone discussion with Mr. Tim Byam of your staff, it is my understanding that Exelon plans to respond to this request by September 30, 2004.
Should you have any questions, please contact me on (301) 415-2277.
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:
Request for Additional Information cc w/encls: See next page
August 10, 2004 Mr. Christopher M. Crane, President Exelon Nuclear Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 & QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 - REQUEST FOR INFORMATION
- CONCRETE EXPANSION ANCHORS (TAC NOS. MB7297, MB7298, MB7299 AND MB7300)
Dear Mr. Crane:
Our review of your letter dated September 11, 2002, which responded to NRC inspection items related to concrete expansion anchors, has identified the need for additional information. A request for information was sent to Mr. Ken Nicely of Exelon via an e-mail on March 25, 2004.
However, no response has been received as of this date. The request for information is enclosed. Based on my telephone discussion with Mr. Tim Byam of your staff, it is my understanding that Exelon plans to respond to this request by September 30, 2004.
Should you have any questions, please contact me on (301) 415-2277.
Sincerely, 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:
Request for Additional Information cc w/encls: See next page DISTRIBUTION:
PUBLIC PDIII-2 R/F AMendiola PCoates MBanerjee OGC SReynolds, RIII KManoly DLPM DPR LRossbach DHills, RIII RidsAcrsAcnwMailCenter JNeurauter, RIII ADAMS Accession Number: ML042160582 OFFICE PM:PDIII-2 PM:PDIII-2 LA:PDIII-2 DE:EMEB SC:PDIII-2 NAME MBanerjee LRossbach PCoates KManoly AMendiola DATE 08/06/04 8/4/04 N/A 8/4/04 08/10/04 OFFICIAL RECORD COPY
Dresden and Quad Cities Nuclear Power Stations cc:
Site Vice President - Dresden Nuclear Power Station Exelon Generation Company, LLC 6500 N. Dresden Road Morris, IL 60450-9765 Dresden Nuclear Power Station Plant Manager Exelon Generation Company, LLC 6500 N. Dresden Road Morris, IL 60450-9765 Regulatory Assurance Manager - Dresden Exelon Generation Company, LLC 6500 N. Dresden Road Morris, IL 60450-9765 U.S. Nuclear Regulatory Commission Dresden Resident Inspectors Office 6500 N. Dresden Road Morris, IL 60450-9766 Chairman Grundy County Board Administration Building 1320 Union Street Morris, IL 60450 Regional Administrator U.S. NRC, Region III 801 Warrenville Road Lisle, IL 60532-4351 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 - Nuclear Services Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President of Operations - Mid-West Boiling Water Reactors Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President - Licensing and Regulatory Affairs 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 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 Site Vice President - Quad Cities Nuclear Power Station Exelon Generation Company, LLC 22710 206th Avenue N.
Cordova, IL 61242-9740 Quad Cities Nuclear Power Station Plant Manager Exelon Generation Company, LLC 22710 206th Avenue N.
Cordova, IL 61242-9740
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
ENCLOSURE DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 REQUEST FOR ADDITIONAL INFORMATION CONCRETE EXPANSION ANCHORS 1.
Exelon letter to the NRC dated September 11, 2002, indicated that Dresden and Quad Cities UFSAR Section 3.8.4.6, "Concrete Expansion Anchors," that stated concrete expansion anchors (CEAs) were installed following manufacturer's recommendations, was revised to clarify that this section applied only to the IEB 79-02 response (i.e., not to the CEAs for high energy restraints (HERs)). Please indicate what Code, Standard or practice accepted by the NRC for design these CEAs in safety related applications were designed to.
2.
Please review the application of the CEAs used as high energy restraints that have factors of safety in the range of 2.5 to 3.8 (one at Dresden and five at Quad Cities), and discuss the safety impact of these CEAs failing to perform their safety function including restraining a pipe whip.
3.
Exelon letter to the NRC, dated September 11, 2002, discussed some of the inherent conservatism in the HER design. Please provide the results of analyses that quantify these conservatisms.