ML060470328
| ML060470328 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 02/22/2006 |
| From: | Banerjee M Plant Licensing Branch III-2 |
| To: | Crane C Exelon Generation Co |
| Banerjee M, NRR/ADPT, 415-2277 | |
| References | |
| TAC MC7068 | |
| Download: ML060470328 (4) | |
Text
February 22, 2006 Mr. Christopher M. Crane, President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
DRESDEN NUCLEAR POWER STATION, UNIT 3 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO RELIEF REQUEST CR-28 (TAC NO. MC7068)
Dear Mr. Crane:
By letter to the Nuclear Regulatory Commission (NRC) dated May 6, 2005, Exelon Generation Company, LLC requested relief from American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, Rules for Inservice Inspection of Nuclear Power Plant Components, and the augmented examinations specified in 10 CFR 50.55a(g)(6)(ii)(A)(2), for the Dresden Nuclear Power Station, Units 2 and 3.
The NRC staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested was e-mailed to your staff on January 25, 2006, and is addressed in the enclosure to this letter. During a discussion with your staff on February 7, 2006, it was agreed that you would provide a response to the RAI by March 10, 2006.
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) 415-2277.
Sincerely,
/RA/
Maitri Banerjee, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-249
Enclosure:
Request for Additional Information cc w/encl: See next page
Mr. Christopher M. Crane, President February 22, 2006 and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
DRESDEN NUCLEAR POWER STATION, UNIT 3 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO RELIEF REQUEST CR-28 (TAC NO. MC7068)
Dear Mr. Crane:
By letter to the Nuclear Regulatory Commission (NRC) dated May 6, 2005, Exelon Generation Company, LLC requested relief from American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, Rules for Inservice Inspection of Nuclear Power Plant Components, and the augmented examinations specified in 10 CFR 50.55a(g)(6)(ii)(A)(2), for the Dresden Nuclear Power Station, Units 2 and 3.
The NRC staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested was e-mailed to your staff on January 25, 2006, and is addressed in the enclosure to this letter. During a discussion with your staff on February 7, 2006, it was agreed that you would provide a response to the RAI by March 10, 2006.
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) 415-2277.
Sincerely,
/RA/
Maitri Banerjee, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-249
Enclosure:
Request for Additional Information cc w/encl: See next page DISTRIBUTION:
PUBLIC LPLF R/F RidsNrrDorlLplf RidsNrrPMMBanerjee RidsNrrLADClarke RidsAcrsAcnwMailCenter RidsOGCRp RidsRgn3MailCenter RidsNrrDorlDpr RidsNrrDciDpr ADAMS Accession Number: ML060470328 OFFICE LPLIII-2/PM DCI/CVIB/BC LPLIII-2/BC (A)
NAME MBanerjee MMitchell MLandau DATE 2/22/06 2/22/06 2/22/06 OFFICIAL RECORD COPY
Dresden Nuclear Power Units 2 and 3 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, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 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 of Operations 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 Assistant General Counsel Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348 Manager Licensing - Dresden, Quad Cities and Clinton Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
Enclosure REQUEST FOR ADDITIONAL INFORMATION DRESDEN NUCLEAR POWER STATION, UNIT 3 DOCKET NO. 50-249 In reviewing the Exelon Generation Companys (Exelons) submittal dated May 8, 2005, related to the request for relief from American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, Rules for Inservice Inspection of Nuclear Power Plant Components, and the augmented examinations specified in 10 CFR 50.55a(g)(6)(ii)(A)(2), for the Dresden Nuclear Power Station, Unit 3 (Dresden 3), the NRC staff has determined that the following information is needed in order to complete its review:
By letter dated March 23, 2005, the NRC approved an alternative Reactor Pressure Vessel (RPV) weld examination pursuant to Title 10 of the Code of Federal Regulations (10 CFR), Section 50.55a(a)(3)(I) and 10 CFR 50.55a(g)(6)(ii)(A)(5) for Dresden Nuclear Power Station, Units 2 and 3 (Dresden 2 and 3) that allows permanent deferral of the requirements to perform a volumetric examination of the RPV circumferential welds for the extended operating license terms for Dresden 2 and 3. This alternative requires examinations of essentially 100 percent of all longitudinal welds and examinations of approximately 2 to 3 percent of the circumferential welds at their points of intersection with the longitudinal welds.
In proposed Relief Request CR-28, Exelon did not indicate the extent to which the reduced examination volumes for the RPV longitudinal welds, as specified in the attachment to their May 6, 2005, letter, included the points of intersection with the circumferential welds. Please provide supplemental information indicating whether the reduced examination volumes for the specified Dresden 3 RPV longitudinal welds included all of the points of intersection with the circumferential welds. In addition, please indicate whether 2 to 3 percent volumetric coverage of the circumferential welds in the vicinity of the points of intersection with the longitudinal welds was achieved.