ML080520164

RAI Related to Request for Relief I3R-11, Associated with the Third 10-Year Inservice Inspection Interval, Inspection Program Plan Risk-Informed Inservice Inspection of Piping

ML080520164
Person / Time
Site:	LaSalle
Issue date:	02/21/2008
From:	Sands S NRC/NRR/ADRO/DORL/LPLIII-2
To:	Pardee C Exelon Generation Co
Sands S,NRR/DORL, 415-3154
References
TAC MD5469, TAC MD5470
Download: ML080520164 (4)

Text

February 21, 2008 Mr. Charles G. Pardee Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

LASALLE COUNTY STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO REQUEST FOR RELIEF I3R-11 ASSOCIATED WITH THE THIRD 10-YEAR INSERVICE INSPECTION INTERVAL, INSPECTION PROGRAM PLAN RISK-INFORMED INSERVICE INSPECTION OF PIPING (TAC NOS. MD5469 AND MD5470)

Dear Mr. Pardee:

By letter to the Nuclear Regulatory Commission (NRC) dated April 30, 2007, Exelon Generation Company, LLC submitted a relief request (RR) associated with the third inservice inspection interval, for the LaSalle County Station, Units 1 and 2. The submittal requests relief from the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, requirements for the selection and examination of Class 1 and 2 piping and welds. Pursuant to Title 10 of the Code of Federal Regulations (10 CFR), Section 50.55a(a)(3)(ii), RR I3R-11 requests relief on the basis that compliance with the specified requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.

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, it was agreed that you would provide a response within 15 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. Charles G. Pardee February 21, 2008 Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

LASALLE COUNTY STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO REQUEST FOR RELIEF I3R-11 ASSOCIATED WITH THE THIRD 10-YEAR INSERVICE INSPECTION INTERVAL, INSPECTION PROGRAM PLAN RISK-INFORMED INSERVICE INSPECTION OF PIPING (TAC NOS. MD5469 AND MD5470)

Dear Mr. Pardee:

By letter to the Nuclear Regulatory Commission (NRC) dated April 30, 2007, Exelon Generation Company, LLC submitted a relief request (RR) associated with the third inservice inspection interval, for the LaSalle County Station, Units 1 and 2. The submittal requests relief from the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, requirements for the selection and examination of Class 1 and 2 piping and welds. Pursuant to Title 10 of the Code of Federal Regulations (10 CFR), Section 50.55a(a)(3)(ii), RR I3R-11 requests relief on the basis that compliance with the specified requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.

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, it was agreed that you would provide a response within 15 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 DISTRIBUTION:

PUBLIC LPL3-2 R/F RidsNrrDorlLpl3-2 RidsNrrLAEWhitt RidsNrrDorlDpr RidsNrrPMSSands RidsOgcRp RidsRgn3MailCenter RidsAcrsAcnw&mMailCenter ADAMS Accession Number: ML080520164 OFFICE LPL3-2/PM LPL3-2/LA LPL3-2/BC NAME SSands EWhitt RGibbs (HChernoff for)

DATE 02/21/08 02/21/08 02/21/08 OFFICIAL RECORD COPY

LaSalle County Station, Units 1 and 2 cc:

Corporate Distribution Exelon Generation Company, LLC Via e-mail LaSalle Distribution Exelon Generation Company, LLC Via e-mail LaSalle Senior Resident Inspector U.S. Nuclear Regulatory Commission Via e-mail Phillip P. Steptoe, Esquire Sidley and Austin One First National Plaza Chicago, IL 60603 Assistant Attorney General 100 W. Randolph St. Suite 12 Chicago, IL 60601 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 June 18, 2007, related to a relief request (RR) associated with the third inservice inspection interval, for the LaSalle County Station, Units 1 and 2. The submittal requests relief from the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),Section XI, requirements for the selection and examination of Class 1 and 2 piping and welds. The Nuclear Regulatory Commission staff has determined that the following information is needed in order to complete its review:

(A) Please provide the information regarding at what temperature and pressure that the following tests will be performed for the accessible and inaccessible (the unit cross-tie piping) piping in the hydrogen recombiner system:

(1) The ASME Code required system leakage test to be conducted once each inspection period.

(2) The licensees proposed alternative system pressure test at peak accident pressure, once each inspection interval.

(3) The 10-year hydrostatic test.

(4) The functional test of the hydrogen recombiner system during every refueling outage.

(B) Please describe the service conditions (temperature, pressure, environment, time at various conditions) of the unit cross-tie piping.

Enclosure