ML042160582

Request for Information, Concrete Expansion Anchors

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 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

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.

ENCLOSURE