ML062920419
| ML062920419 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 11/28/2006 |
| From: | Sands S NRC/NRR/ADRO/DORL/LPLIII-2 |
| To: | Exelon Generation Co |
| Sands S,NRR/DORL, 415-3154 | |
| Shared Package | |
| ML063330299 | List: |
| References | |
| TAC MD0360, TAC MD0361 | |
| Download: ML062920419 (6) | |
Text
November 28, 2006 LICENSEE:
Exelon Generation Company, LLC FACILITY:
LaSalle County Station Units 1 and 2
SUBJECT:
SUMMARY
OF SEPTEMBER 19, 2006, PRE-APPLICATION MEETING WITH EXELON GENERATION COMPANY, LLC, WITH RESPECT TO ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST FOR GANGED ROD WITHDRAWAL (TAC NOS. MD0360 AND MD0361)
On September 19, 2006, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of Exelon Generation Company, LLC (Exelon) at NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discuss additional information needed by the NRC staff to review Exelons proposed license amendment request (LAR) to change the licensing basis to allow ganged rod drive capability of the rod control management system (RCMS). The proposed LAR would incorporate the addition of a new accident description to the LaSalle County Station Updated Final Safety Analysis Report (UFSAR), Section 15.4.1.3, Multiple Rod Withdrawal Error on Startup. The proposed LAR would allow motion of ganged rod groups as part of a new RCMS. Ganged rod motion will allow withdrawal of up to four rods in assigned groups during startup conditions.
Exelon presented information (Enclosure 2) in support of the LAR which the NRC staff will evaluate when submitted. The NRC staff discussed the LAR with Exelon and queried them regarding the following four areas:
Intent of the LAR should be clearly defined.
The LAR must clearly define the communication interface, as well as data interface, of the various RCMS components, and the interfaces between any external systems and the RCMS.
The LAR should describe the controls (i.e., hardware and software) that restrict the maintenance display from selecting and controlling the movement of the rods.
The LAR needs to address cyber security. Specifically, the LAR should fully describe the data ports into the RCMS from external sources, and the controls that will prevent unauthorized access to, and control of the RCMS. The submittal should include a network diagram, description of firewalls, and means/methods of intrusion detection.
The LAR should describe the qualification of all RCMS components and equipment, including the identification of the manufacturer and model of the hardware components.
The LAR should describe how, and to what extent the new RCMS displays and controls are used for RG 1.97, Criteria For Accident Monitoring Instrumentation For Nuclear Power Plants, Rev. 4 (Agencywide Documents Access and Management System Accession No. ML061580448) and emergency operating procedures purposes.
The LAR should describe how the RCMS system processes rod-block signals from both a hardware and software perspective.
Failure Analysis a.
The LAR should provide an analysis of the potential single failures that could result in the uncontrolled withdrawal of a rod gang. The failure modes and effects analysis (FMEA) should also be submitted as an attachment to the LAR.
b.
The LAR should clearly characterize the likelihood of a common-mode software failure, and should include a description of the software development and testing program that minimizes the probability of a common-mode software failure.
c.
The LAR should describe what would happen if the low probability event (e.g.,
failures leading to the uncontrolled withdrawal of a rod gang) were to occur.
The No Significant Hazards Consideration, should address all NUREG-0800, Standard Review Plan, Section 15 accidents that involve control rod movement.
Members of the public were in attendance. Public Meeting Feedback forms were not 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 The LAR should describe how, and to what extent the new RCMS displays and controls are used for RG 1.97, Criteria For Accident Monitoring Instrumentation For Nuclear Power Plants, Rev. 4 (Agencywide Documents Access and Management System Accession No. ML061580448) and emergency operating procedures purposes.
The LAR should describe how the RCMS system processes rod-block signals from both a hardware and software perspective.
Failure Analysis a.
The LAR should provide an analysis of the potential single failures that could result in the uncontrolled withdrawal of a rod gang. The failure modes and effects analysis (FMEA) should also be submitted as an attachment to the LAR.
b.
The LAR should clearly characterize the likelihood of a common-mode software failure, and should include a description of the software development and testing program that minimizes the probability of a common-mode software failure.
c.
The LAR should describe what would happen if the low probability event (e.g.,
failures leading to the uncontrolled withdrawal of a rod gang) were to occur.
The No Significant Hazards Consideration, should address all NUREG-0800, Standard Review Plan, Section 15 accidents that involve control rod movement.
Members of the public were in attendance. Public Meeting Feedback forms were not 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 DISTRIBUTION:
PUBLIC RidsOgcRp PRebstock, NRR GSingh, NRR LPL3-2 R/F RidsAcrsAcnwMailCenter KMartin, NRR TBloomer, EDO RidsNrrDorlLpl3-2 RJasinski, NRR RidsNrrPmSSands RidsNrrDeEicb RidsNrrEWhitt DZhang, NRR RidsRgn3MailCenter Package accession no. ML063330299 Slides accession no. ML063330288 ADAMS Accession Number: ML062920419 NRC-001 OFFICE LPL3-2/PM LPL3-2/LA LPL3-2/BC NAME SSands:mw EWhitt MMarshall DATE 11/27/06 11/27/06 11/28/06 OFFICIAL RECORD COPY
ENCLOSURE LIST OF ATTENDEES NAME ORGANIZATION PHONE Terrance W. Simpkin Exelon - LaSalle County Station 815-415-2800 Darin Benyak Exelon - Licensing 630-657-2811 John Schrage Exelon - licensing 630-657-2821 Alan McLaughlin Exelon - LaSalle County Station 815-415-4921 Robert Fredericksen Exelon - LaSalle County Station 815-415-2381 Ryuji Iwaski Toshiba (public sector)
+81-3-3459-3734 Stephen Sands NRC/NRR/DORL 301-415-3154 Allen Howe NRC/NRR/EICB 310-415-1351 Deanna Zhang NRC/NRR/DE/EICB 301-415-1946 Dan Collins NRC/NRR/DORL 301-415-8707 Paul Rebstock NRC/NRR/DE/EICB 301-415-3295 Gush Singh NRC/NRR/DE/EICB 301-415-2962 Kamishan Martin NRC/NRR/DRIS 301-415-3469
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 U.S. NRC, Region III 801 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 -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 & Legal 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 LaSalle County Station, Units 1 and 2 cc:
Manager Licensing - 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