ML070580307
| ML070580307 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 03/12/2007 |
| From: | Sands S NRC/NRR/ADRO/DORL/LPLIII-2 |
| To: | Exelon Generation Co |
| Sands S,NRR/DORL, 415-3154 | |
| Shared Package | |
| ML070650255 | List: |
| References | |
| Download: ML070580307 (7) | |
Text
March 12, 2007 LICENSEE:
EXELON GENERATION COMPANY, LLC FACILITY:
LASALLE COUNTY STATION, UNITS 1 AND 2
SUBJECT:
SUMMARY
OF JANUARY 26, 2007, PRE-APPLICATION MEETING WITH EXELON, FOR GANGED ROD WITHDRAWAL AND ULTIMATE HEAT SINK AMENDMENT DENIAL On January 26, 2007, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of Exelon Generation Company (EGC) at NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discuss the licensees plan for re-submittal of the proposed license amendment request (LAR), to change the licensing basis to allow ganged rod drive capability of the rod control management system (RCMS). The LAR was first submitted to the NRC staff on March 15, 2006, with supplements dated May 10 and June 1, 2006. The LAR was subsequently withdrawn on July 31, 2006.
The NRC staff also met with EGCs licensing and technical representatives to discuss their ultimate heat sink (UHS) amendment request for LaSalle County Station, Units 1 and 2 (LaSalle), and the NRC staffs subsequent denial of that request. The original LAR was submitted on March 13, 2006, with supplemental letters for additional information dated June 15, July 13, and August 4, 2006, as well as two telecon discussions to clarify the additional information. On January 24, 2007, EGC submitted a letter to NRC in response to the November 3, 2006, denial of the UHS amendment request for LaSalle. However, the NRC staff had not had an opportunity to evaluate the letter due to the timing of the response with respect to the meeting and was not able to discuss the response to the denial. A written response to EGC is pending.
RCMS AMENDMENT EGC presented slides to include an outline of the draft LAR, as well as information regarding the technical and regulatory basis for the planned RCMS submittal, scope and level of detail, and necessary regulatory requirements necessary for the LAR approval.
During the discussion, the NRC staff conveyed to EGC that a number of documents and information would need to be submitted and/or augmented beyond EGCs previous submittal.
The following is a list of some of the documents to be included in the new LAR submittal:
A software V&V (verification and validation) plan Software design specifications and requirements Software safety/cyber security plan Software quality assurance, management, and development Training, operations, and maintenance plans Safety analysis (requirements, V&V, design, integration)
Software and hardware descriptions Description of how, and to what extend the new RCMS displays and controls are used for Regulatory Guide 1.97 and emergency operating plan purposes Analysis of the potential single failures that could result in the uncontrolled withdrawal of a rod gang Failure modes and effects analysis No significant hazards consideration needs to include analysis of Section 15 (NUREG-0800) accidents, which involve control rod movement The LAR must include specific warranty from General Electric (GE) as to the completeness and accuracy of the information, for any GE documents ULTIMATE HEAT SINK The meeting on January 26, 2007, also included a presentation by EGC regarding the UHS submittal and the NRC staffs subsequent denial of that LAR. The reason for EGCs initial amendment request for LaSalle, was to increase the technical specification (TS) temperature limit for the UHS. LaSalle often experiences higher than average temperatures in the summer and often is close to the TS limit of 100EF for the UHS. The original amendment sought to increase the UHS TS temperature limit to 101.5EF by installing high accuracy reference temperature detectors (RTDs). On November 3, 2006, the NRC sent a letter to EGC denying the LAR and concluded that the requested modifications to the TSs were not supported by the analysis provided by EGC.
This meeting on January 26, 2007, provided both the NRC staff and EGC an opportunity to review the NRC staffs safety evaluation denying the LAR with respect to EGCs original March 13, 2006, request. In addition to evaluating the original LAR and the NRCs safety evaluation, the approach was to discuss the UHS licensing basis, the plant design for the circulating water system and temperature instrumentation, the procedures LaSalle uses to evaluate UHS temperatures, and discuss the regulatory approach to resolving the issue. At the end of the discussion, the NRC staff indicated that a follow-on meeting with EGC would be beneficial. The follow-on meeting would completely address the concerns the NRC staff had raised in its safety evaluation and work toward a resolution of issues and a path to success for the proposed new LAR.
Action items were identified for both the NRC staff and EGC to address before the next meeting. The NRC staff will evaluate EGCs response to the denial including, regulatory basis, graded approach to setpoint methodology, and clarify the review for non-limiting safety system set points. The NRC staff also agreed to engage the TS Branch to review if the TS Bases is the proper vehicle to address the circumstance where 3 of 4 RTDs are out of service. The follow-up meeting to resolve any differences and review the action items is projected for the March 21 through March 28, 2007, time frame.
Public Meeting Feedback forms were available to be passed out, but none were received.
Please direct any inquiries to me at 301-415-3154, or [sps1@nrc.gov].
/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
Enclosures:
- 1. List of Attendees
- 2. Licensee Handout cc w/encls: See next page Public Meeting Feedback forms were available to be passed out, but none were received.
Please direct any inquiries to me at 301-415-3154, or [sps1@nrc.gov].
/RA/
Stephen P. Sands, Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No(s). 50-373 and 50-374
Enclosures:
- 1. List of Attendees
- 2. Licensee Handout cc w/encls: See next page DISTRIBUTION:
NON-PUBLIC LPL3-2 R/F RidsNrrDorlLpl3-2 RidsNrrPMSSands RidsNrrLAEWhitt Package Accession Number: ML070650255 ADAMS Accession Number: ML070580307 (Summary)
Handouts Accession Number: ML070600291 NRC-001 OFFICE LPL3-2/PM LPL3-2/LA LPL3-2/BC NAME SSands:mw EWhitt RGibbs DATE 3/9/2007 3/9/2007 3/12/2007 OFFICIAL RECORD COPY
LaSalle County Station, Units 1 and 2 cc:
Site Vice President - LaSalle County Station Exelon Generation Company, LLC 2601 North 21st Road Marseilles, IL 61341-9757 Plant Manager - LaSalle County Station Exelon Generation Company, LLC 2601 North 21st Road Marseilles, IL 61341-9757 Manager Regulatory Assurance - LaSalle Exelon Generation Company, LLC 2601 North 21st Road Marseilles, IL 61341-9757 U.S. Nuclear Regulatory Commission LaSalle Resident Inspectors Office 2605 North 21st Road Marseilles, IL 61341-9756 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 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4352 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 - Operations Support 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 Vice President - 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
LaSalle County Station, Units 1 and 2 cc:
Manager Licensing - Braidwood, Byron, and LaSalle Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Senior Vice President - Midwest Operations Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Mr. Christopher M. Crane, President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 NAME ORGANIZATION PHONE Keith Jury Exelon - Licensing Terrance W. Simpkin Exelon - LaSalle County Station 815-415-2800 Darin Benyak Exelon - Licensing 630-657-2811 Alison MacKellar Exelon - Licensing 630-657-2817 John Schrage Exelon - Licensing 630-657-2821 John Bashor Exelon - LaSalle County Station 815-415-3800 Alan McLaughlin Exelon - LaSalle County Station 815-415-4921 Robert Fredericksen Exelon - LaSalle County Station 815-415-2381 Stephen Sands NRC/NRR/DORL, PM 301-415-3154 Allen Howe NRC/NRR/EICB, BC 310-415-1351 Michael Marshall NRC/NRR/DORL, BC 301-415-0539 Paul Rebstock NRC/NRR/DE/EICB 301-415-3295 Hukam Garg NRC/NRR/DE/EICB 301-415-2929 Ken OBrien NRC/NRR 301-415-3469