ML053260303

RAI, Amendment Request

ML053260303
Person / Time
Site:	LaSalle
Issue date:	11/23/2005
From:	Sands S NRC/NRR/ADRO/DORL/LPLF
To:	Crane C Exelon Generation Co
Sands S, NRR/DLPM/415-3154
References
TAC MC7251, TAC MC7252
Download: ML053260303 (8)

Text

November 23, 2005 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 AMENDMENT REQUEST (TAC NOS. MC7251 AND MC7252)

Reference:

Letter from Keith R. Jury (Exelon Generation Company, LLC) to the U.S. Nuclear Regulatory Commission (NRC), "Request for Amendment to Technical Specifications Section 5.6.5, "Core Operating Limits Report (COLR)," dated March 7, 2005

Dear Mr. Crane:

In the referenced letter, Exelon Generation Company, LLC submitted a request for an amendment for LaSalle County Station, Units 1 and 2. This submittal was made to modify the Technical Specification (TS) Sections 5.6.5, "Core Operating Limits Report (COLR)." The proposed changes will add two new NRC approved topical report references to the list of analytical methods in TS 5.6.5, "Core Operating Limits Report (COLR)," that can be used to determine core operating limits. While reviewing your March 7, 2005 submittal, the NRC staff has determined that additional information as discussed in the enclosure to this letter, is needed to complete its review of your application.

The NRC staff developed the enclosed questions and a draft version of these questions were compiled in a request for additional information (RAI) and transmitted to Ms. Alison MacKellar of your staff via e-mail on October 13, 2005. The e-mail, also, provided for an opportunity for a phone call with NRC staff in case any clarifications were sought by Exelon. Subsequently, a phone call was conducted which clarified the final RAI, which is enclosed. It is requested that Exelon provide a response to the enclosed RAI within 30 days from the date of this letter.

C. Crane If you have any questions, please do not hesitate to contact me 301-415-3154 or by e-mail:

sps1@nrc.gov.

Sincerely,

/RA by G.Dick for/

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

C. Crane If you have any questions, please do not hesitate to contact me 301-415-3154 or by e-mail:

sps1@nrc.gov.

Sincerely,

/RA by G.Dick for/

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:

As stated above cc w/encl: See next page DISTRIBUTION:

PUBLIC LLois LPL III-2 R/F GMorris GSuh SSands PCoates TFord BBurgess, RIII GHill (4), T5C3 ADAMS Accession Number: ML053260303 Nrr-088 OFFICE PM:LPLIII-2 LA:LPLIII-2 SC:SBWB SC:LPLIII-2 NAME SPSands PCoates LLois GDick for GSuh DATE 11/22/05 11/22/05 11/22/05 11/23/05 OFFICIAL RECORD COPY

REQUEST FOR ADDITIONAL INFORMATION AMENDMENT TO TECHNICAL SPECIFICATION 5.6.5 LA SALLE COUNTY STATION, UNITS 1 AND 2 DOCKET NOS. 50-373 AND 50-374 In your letter from Keith R. Jury (Exelon Generation Company, LLC) to the U.S. Nuclear Regulatory Commission (NRC), "Request for Amendment to Technical Specifications Section 5.6.5, "Core Operating Limits Report (COLR)," dated March 7, 2005, one of the changes LaSalle is proposing to TS Section 5.6.5, "Core Operating Limits Report (COLR)" is to add an NRC previously approved Framatome Advanced Nuclear Power, Inc. topical report reference for an updated methodology for evaluation of Loss-of-Coolant Accident (LOCA) conditions (EXEM BWR-2000 ECCS Evaluation Model). In order for the proposed methodology reference to be incorporated into TS Section 5.6.5, (1) the methodology must be approved by the NRC, (2) the applicant must apply the methodology by performing an LOCA analysis, and (3) the applicant must submit the results of the LOCA analysis to the staff.

In performing the new LOCA analysis, the applicant must demonstrate the effects of any change in an acceptable evaluation model or in the application of such a model to determine if the change is significant. A significant change is defined as a peak fuel cladding temperature difference of more than 50E F from the temperature calculated for the limiting transient using the last acceptable model. Based on the above, the staff is requesting additional information to complete its review.

1. Was a new LOCA analysis performed using the proposed EXEM BWR-2000 evaluation model to determine if there is a peak fuel temperature change of more than 50E F from the temperature calculated for the limiting transient using the current acceptable model?

(a) If yes, i) please provide the key input parameters used in both the current analysis of record, and for EXEM BWR-2000 and, ii) submit the peak fuel temperature results for the new analysis using EXEM BWR-2000 as well as the peak fuel temperature results for the current analysis of record.

(b) If a new LOCA analysis was not performed, please provide justification, or perform a new LOCA analysis using the EXEM BWR-2000 evaluation model and i) please provide the key input parameters used in both the current analysis of record, and for EXEM BWR-2000 and, ii) submit the peak fuel temperature results for the new analysis using EXEM BWR-2000 as well as the peak fuel temperature results for the current analysis of record.

ENCLOSURE

LaSalle County Station Units 1 and 2 cc:

Site Vice President - LaSalle County Station Robert Cushing, Chief, Public Utilities Division Exelon Generation Company, LLC Illinois Attorney General's Office 2601 North 21st Road 100 W. Randolph Street Marseilles, IL 61341-9757 Chicago, IL 60601 LaSalle County Station Plant Manager Regional Administrator Exelon Generation Company, LLC U.S. NRC, Region III 2601 North 21st Road 801 Warrenville Road Marseilles, IL 61341-9757 Lisle, IL 60532-4351 Regulatory Assurance Manager - LaSalle Illinois Emergency Management Exelon Generation Company, LLC Agency 2601 North 21st Road Division of Disaster Assistance &

Marseilles, IL 61341-9757 Preparedness 110 East Adams Street U.S. Nuclear Regulatory Commission Springfield, IL 62701-1109 LaSalle Resident Inspectors Office 2605 North 21st Road Document Control Desk - Licensing Marseilles, IL 61341-9756 Exelon Generation Company, LLC 4300 Winfield Road Phillip P. Steptoe, Esquire Warrenville, IL 60555 Sidley and Austin One First National Plaza Senior Vice President - Nuclear Services Chicago, IL 60603 Exelon Generation Company, LLC 4300 Winfield Road Assistant Attorney General Warrenville, IL 60555 100 W. Randolph St. Suite 12 Chicago, IL 60601 Vice President of Operations - Mid-West Boiling Water Reactors Chairman Exelon Generation Company, LLC LaSalle County Board 4300 Winfield Road 707 Etna Road Warrenville, IL 60555 Ottawa, IL 61350 Vice President - Licensing and Regulatory Attorney General Affairs 500 S. Second Street Exelon Generation Company, LLC Springfield, IL 62701 4300 Winfield Road Warrenville, IL 60555 Chairman Illinois Commerce Commission 527 E. Capitol Avenue, Leland Building Springfield, IL 62706

LaSalle County Station Units 1 and 2 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