ML081630557
| ML081630557 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 06/20/2008 |
| From: | Peter Bamford NRC/NRR/ADRO/DORL/LPLI-2 |
| To: | Pardee C Exelon Generation Co |
| Bamford, Peter J., NRR/DORL 415-2833 | |
| References | |
| TAC MD7048, TAC MD7049 | |
| Download: ML081630557 (4) | |
Text
June 20, 2008 Mr. Charles G. Pardee Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348
SUBJECT:
LIMERICK GENERATING STATION, UNIT NOS. 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED LOCAL POWER RANGE MONITOR CALIBRATION FREQUENCY REVISION (TAC NOS.
MD7048 AND MD7049)
Dear Mr. Pardee:
By letter dated October 19, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML072970339), Exelon Generation Company, LLC, submitted a license amendment request (LAR) regarding an extension of the local power range monitor calibration interval specified in the technical specifications for Limerick Generating Station, Units 1 and 2. The original LAR was supplemented by letters dated March 14, 2008 (ADAMS Accession No. ML080850565) and March 26, 2008 (ADAMS Accession No. ML080990667).
The U.S. Nuclear Regulatory Commission staff has been reviewing your LAR, and has determined that a response to the enclosed Request for Additional Information (RAI) is necessary in order for the staff to complete its review. The questions in the enclosure were sent to Mr. Richard Gropp of your staff via electronic transmission in draft form on June 3, 2008. The draft RAI was sent to ensure that the questions were understandable, the regulatory basis was clear and to determine if the information was previously docketed. These questions were discussed with your staff in a teleconference on June 9, 2008, and it was agreed that you would provide responses within 30 days of the date of this letter.
Please contact me at 301-415-2833 if you have any questions.
Sincerely,
/ra/
Peter J. Bamford, Project Manager Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353
Enclosure:
As stated cc w/encl: See next page
Limerick Generating Station, Unit Nos. 1 and 2 cc:
Christopher Mudrick Site Vice President Limerick Generating Station Exelon Generation Company, LLC 3146 Sanatoga Road Sanatoga, PA 19464 Ed Callan, Plant Manager Limerick Generating Station Exelon Generation Company, LLC 3146 Santoga Road Sanatoga, PA 19464 Manager Regulatory Assurance - Limerick Generating Station Exelon Generation Company, LLC 3146 Sanatoga Road Sanatoga, PA 19464 Senior Vice President - Mid-Atlantic Operations Exelon Generation Company, LLC 200 Exelon Way, KSA 3-N Kennett Square, PA 19348 Chief Operating Officer-Exelon Nuclear 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 Vice President Licensing and Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Director, Licensing and Regulatory Affairs Exelon Generation Company, LLC Correspondence Control P.O. Box 160 Kennett Square, PA 19348 Manager Licensing Exelon Generation Company, LLC Correspondence Control P.O. Box 160 Kennett Square, PA 19348 Correspondence Control Desk Exelon Generation Company, LLC 200 Exelon Way, KSA 1-N-1 Kennett Square, PA 19348 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Senior Resident Inspector U.S. Nuclear Regulatory Commission Limerick Generating Station P.O. Box 596 Pottstown, PA 19464 Library U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406 Director, Bureau of Radiation Protection Pennsylvania Dept. of Environmental Protection Rachel Carson State Office Building P.O. Box 8469 Harrisburg, PA 17105-8469 Chairman Board of Supervisors of Limerick Township 646 West Ridge Pike Linfield, PA 19468 Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803
Limerick Generating Station, Unit Nos. 1 and 2 cc:
J. Bradley Fewell, Esquire Associate General Counsel Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Mr. Charles G. Pardee Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
June 20, 2008 Mr. Charles G. Pardee Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348
SUBJECT:
LIMERICK GENERATING STATION, UNIT NOS. 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED LOCAL POWER RANGE MONITOR CALIBRATION FREQUENCY REVISION (TAC NOS.
MD7048 AND MD7049)
Dear Mr. Pardee:
By letter dated October 19, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML072970339), Exelon Generation Company, LLC, submitted a license amendment request (LAR) regarding an extension of the local power range monitor calibration interval specified in the technical specifications for Limerick Generating Station, Units 1 and 2. The original LAR was supplemented by letters dated March 14, 2008 (ADAMS Accession No. ML080850565) and March 26, 2008 (ADAMS Accession No. ML080990667).
The U.S. Nuclear Regulatory Commission staff has been reviewing your LAR, and has determined that a response to the enclosed Request for Additional Information (RAI) is necessary in order for the staff to complete its review. The questions in the enclosure were sent to Mr.
Richard Gropp of your staff via electronic transmission in draft form on June 3, 2008. The draft RAI was sent to ensure that the questions were understandable, the regulatory basis was clear and to determine if the information was previously docketed. These questions were discussed with your staff in a teleconference on June 9, 2008, and it was agreed that you would provide responses within 30 days of the date of this letter.
Please contact me at 301-415-2833 if you have any questions.
Sincerely,
/ra/
Peter J. Bamford, Project Manager Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353
Enclosure:
As stated cc w/encl: See next page DISTRIBUTION:
PUBLIC LPL1-2 R/F RidsNrrPMPBamford RidsNrrLAABaxter RidsOgcRp RidsAcrsAcnw&mMailCenter RidsNrrDorlLpl1-2 RidsRgn1MailCenter RidsNrrDorlDpr Accession Number: ML081630557 OFFICE LPL1-2/PM LPL1-2/LA LPL1-2/BC NAME PBamford ABaxter HChernoff DATE 6/17/08 6/17/08 6/20/08 Official Record Copy
REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED CHANGES TO THE TECHNICAL SPECIFICATIONS LOCAL POWER RANGE MONITOR CALIBRATION FREQUENCY LIMERICK GENERATING STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-352 AND 50-353 By letter dated October 19, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML072970339), Exelon Generation Company, LLC, submitted a license amendment request (LAR) regarding an extension of the local power range monitor (LPRM) calibration interval specified in the technical specifications for Limerick Generating Station, Units 1 and 2. The original LAR was supplemented by letters dated March 14, 2008 (ADAMS Accession No. ML080850565) and March 26, 2008 (ADAMS Accession No. ML080990667).
The Nuclear Regulatory Commission staff has been reviewing the submittal and has determined that additional information is needed to complete its review.
1.)
In Enclosure 1 of the March 14, 2008, supplement, it is stated that 2,000 effective full-power hours (EFPH) is equivalent to ~ (approximately) 2,000 Megawatt Days per short ton (MWD/st). Provide a demonstration that 2,000 EFPH is conservative or equivalent to 2,000 MWD/st or provide a proposed surveillance interval that is bounding with respect to the analysis.
- 2.)
In the March 14, 2008, supplement, it is stated that, Reference 9 also shows [emphasis added] that this has an (( )) on the calculated SLMCPR [Safety Limit Minimum Critical Power Ratio] value. Reference 9 was provided by the March 26, 2008, supplement, in which it is stated, For the Limerick plants, comparison between SLMCPR calculations using the original LPRM [local power range monitor] update uncertainty and the doubled LPRM update uncertainty shows an (( )) on the calculated SLMCPR. This is a statement or conclusion. Provide a demonstration or calculations with an explanation that shows this conclusion is valid.
3.)
In the March 26, 2008, supplement, a demonstration was provided regarding doubling of the LPRM uncertainty on the SLMCPR. Is it your intent to apply this doubling to your SLMCPR calculations and reflect this methodology change in your licensing basis when operating with the longer surveillance interval? If so, how will the SLMCPR calculations and the licensing basis documentation be updated?
Quotations in question (2), including the empty brackets, are taken from the non-proprietary versions of the supplements referenced.