ML072550030

RAI Related to Relief Request 13R-05 for Post-Tensioning System Inspection Schedule

ML072550030
Person / Time
Site:	LaSalle
Issue date:	09/17/2007
From:	Sands S NRC/NRR/ADRO/DORL/LPLIII-2
To:	Crane C Exelon Generation Co
Sands S,NRR/DORL, 415-3154
References
TAC MD5467, TAC MD5468
Download: ML072550030 (4)

Text

September 17, 2007 Mr. Christopher M. Crane President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

LASALLE COUNTY STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO RELIEF REQUEST I3R-05 FOR POST-TENSIONING SYSTEM INSPECTION SCHEDULE FOR SITES WITH TWO PLANTS (TAC NOS. MD5467 AND MD5468)

Dear Mr. Crane:

By letter to the Nuclear Regulatory Commission (NRC) dated April 30, 2007, Exelon Generation Company, LLC submitted a request for relief associated with the third inservice inspection (ISI) interval and the second containment inservice inspection (CISI) interval, for the LaSalle County Station, Units 1 and 2.

The NRC staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter. During a discussion with your staff on September 10, 2007, it was agreed that you would provide a response within 30 days from the date of this letter.

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 NRC=s 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) 415-3154.

Sincerely,

/RA/

Stephen P. Sands, Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-373 and 50-374

Enclosure:

Request for Additional Information cc w/encl: See next page

Mr. Christopher M. Crane September 17, 2007 President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

LASALLE COUNTY STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO RELIEF REQUEST I3R-05 FOR POST-TENSIONING SYSTEM INSPECTION SCHEDULE FOR SITES WITH TWO PLANTS (TAC NOS. MD5467 AND MD5468)

Dear Mr. Crane:

By letter to the Nuclear Regulatory Commission (NRC) dated April 30, 2007, Exelon Generation Company, LLC submitted a request for relief associated with the third inservice inspection (ISI) interval and the second containment inservice inspection (CISI) interval, for the LaSalle County Station, Units 1 and 2.

The NRC staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter. During a discussion with your staff on September 10, 2007, it was agreed that you would provide a response within 30 days from the date of this letter.

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 NRC=s 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) 415-3154.

Sincerely,

/RA/

Stephen P. Sands, Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-373 and 50-374

Enclosure:

Request for Additional Information cc w/encl: See next page DISTRIBUTION:

PUBLIC LPL3-2 R/F RidsNrrDorlLpl3-2 RidsNrrPMSSands RidsNrrLAEWhitt RidsAcrsAcnwMailCenter RidsOgcRp RidsRgn3MailCenter RidsNrrDorlDpr ADAMS Accession Number: ML072550030 NRR-088 OFFICE LPL3-2/PM LPL3-2/LA LPL3-2/BC NAME SSands EWhitt RGibbs DATE 9/13/07 9/13/07 9/17/07 OFFICIAL RECORD COPY

LaSalle County Station, Units 1 and 2 cc:

Site Vice President - LaSalle County Station Document Control Desk - Licensing via e-mail via e-mail Plant Manager - LaSalle County Station Senior Vice President - Operations Support via e-mail via e-mail Manager Regulatory Assurance - LaSalle Director - Licensing and Regulatory Affairs via e-mail via e-mail LaSalle Senior Resident Inspector Vice President - Regulatory Affairs U.S. Nuclear Regulatory Commission via e-mail via e-mail Associate General Counsel Phillip P. Steptoe, Esquire via e-mail Sidley and Austin One First National Plaza Manager Licensing - Braidwood, Byron, Chicago, IL 60603 and LaSalle via e-mail Assistant Attorney General 100 W. Randolph St. Suite 12 Senior Vice President - Midwest Operations Chicago, IL 60601 via e-mail Chairman LaSalle County Board 707 Etna Road Ottawa, IL 61350 Attorney General 500 S. Second Street Springfield, IL 62701 Chairman Illinois Commerce Commission 527 E. Capitol Avenue, Leland Building Springfield, IL 62706 Robert Cushing, Chief, Public Utilities Division Illinois Attorney General's Office 100 W. Randolph Street Chicago, IL 60601 Illinois Emergency Management Agency Division of Disaster Assistance &

Preparedness via e-mail

REQUEST FOR ADDITIONAL INFORMATION LASALLE COUNTY STATION, UNITS 1 AND 2 DOCKET NOS. 50-373 AND 50-374 In reviewing the Exelon Generation Company=s (Exelon=s) submittal dated April 30, 2007, related to Relief Request I3R-05, Request for Relief for Post-Tensioning System Inspection Scheduling Requirements For Sites with Two Plants In Accordance with 10 CFR 50.55a(a)(3)(i)

[Title 10 of the Code of Federal Regulations (10 CFR)], for the LaSalle County Station (LSCS),

Units 1 and 2, the NRC staff has determined that the following information is needed in order to complete its review:

In light of the fact that several LSCS, Unit 1 containment tendons were found severely degraded during an inservice inspection in 2003, please discuss your program for substantiating the structural integrity of one unit when severely degraded tendon conditions are found during tendon surveillance of the other unit, for surveillances scheduled based on IWL-2421(b) for sites with multiple plants. How was this finding addressed when the degraded conditions were identified for LSCS, Unit 1 tendons in 2003, that ensured an acceptable level of quality and safety of the post-tensioning systems of both units?