ML080650082
| ML080650082 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/12/2008 |
| From: | John Hughey NRC/NRR/ADRO/DORL/LPLI-2 |
| To: | Pardee C Exelon Generation Co |
| Hughey J, NRR/DORL, 301-415-3204 | |
| References | |
| Download: ML080650082 (6) | |
Text
March 12, 2008 Mr. Charles G. Pardee Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 LICENSE AMENDMENT REQUEST FOR APPLICATION OF ALTERNATIVE SOURCE TERM
Dear Mr. Pardee:
By letter to the Nuclear Regulatory Commission (NRC) dated July 13, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML072570151), Exelon Generation Company, LLC (the licensee), submitted a License Amendment Request (LAR) for application of Alternative Source Term at Peach Bottom Atomic Power Station, Units 2 and 3.
The NRC staff has reviewed the request submitted by the licensee and has identified a need for additional information as set forth in the Enclosure.
The draft questions were sent to David Helker, from your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. On February 26, 2008, Mr. Helker indicated that the licensee will submit a response by March 28, 2008. Please note that if you do not respond to this letter within this agreed response time or provide an acceptable alternate date in writing, we may reject your application for amendment under the provisions of Title 10 of the Code of Federal Regulations, Section 2.108. If you have any questions, please contact John Hughey at (301) 415-3204.
Sincerely,
/ra/
John D. Hughey, Project Manager Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278 cc: See next page
March 12, 2008 Mr. Charles G. Pardee Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 LICENSE AMENDMENT REQUEST FOR APPLICATION OF ALTERNATIVE SOURCE TERM
Dear Mr. Pardee:
By letter to the Nuclear Regulatory Commission (NRC) dated July 13, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML072570151), Exelon Generation Company, LLC (the licensee), submitted a License Amendment Request (LAR) for application of Alternative Source Term at Peach Bottom Atomic Power Station, Units 2 and 3.
The NRC staff has reviewed the request submitted by the licensee and has identified a need for additional information as set forth in the Enclosure.
The draft questions were sent to David Helker, from your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. On February 26, 2008, Mr. Helker indicated that the licensee will submit a response by March 28, 2008. Please note that if you do not respond to this letter within this agreed response time or provide an acceptable alternate date in writing, we may reject your application for amendment under the provisions of Title 10 of the Code of Federal Regulations, Section 2.108. If you have any questions, please contact John Hughey at (301) 415-3204.
Sincerely,
/ra/
John D. Hughey, Project Manager Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278 cc: See next page DISTRIBUTION:
PUBLIC LPLI-2 R/F RidsNrrPMJHughey RidsNrrLAABaxter RDennig RidsRgn1MailCenter RidsNrrDorlLpl1-2 BHeida ADAMS Accession Number: ML080650082
- by memo dated OFFICE LPL1-2/PM LPL1-2/LA SCVB/BC LPL1-2/BC NAME JHughey ABaxter RDennig*
HChernoff DATE 3/10/2008 3/6/2008 2/26/2008 3/12/2008 OFFICIAL RECORD COPY
Peach Bottom Atomic Power Station, Unit Nos. 2 and 3 cc:
Site Vice President Peach Bottom Atomic Power Station Exelon Generation Company, LLC 1848 Lay Road Delta, PA 17314 Plant Manager Peach Bottom Atomic Power Station Exelon Generation Company, LLC 1848 Lay Road Delta, PA 17314 Regulatory Assurance Manager Peach Bottom Atomic Power Station Exelon Generation Company, LLC 1848 Lay Road Delta, PA 17314 Chief Operating Officer (COO)
Exelon Nuclear Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Resident Inspector U.S. Nuclear Regulatory Commission Peach Bottom Atomic Power Station P.O. Box 399 Delta, PA 17314 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. Roland Fletcher Department of Environment Radiological Health Program 2400 Broening Highway Baltimore, MD 21224 Correspondence Control Desk Exelon Generation Company, LLC 200 Exelon Way, KSA 1N1 Kennett Square, PA 19348 Director, Bureau of Radiation Protection Pennsylvania Department of Environmental Protection Rachel Carson State Office Building P.O. Box 8469 Harrisburg, PA 17105-8469 Board of Supervisors Peach Bottom Township 545 Broad Street Ext.
Delta, PA 17314-9203 Mr. Richard McLean Power Plant and Environmental Review Division Department of Natural Resources B-3, Tawes State Office Building Annapolis, MD 21401 Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803 Manager-Financial Control & Co-Owner Affairs Public Service Electric and Gas Company P.O. Box 236 Hancocks Bridge, NJ 08038-0236 Manager Licensing-Peach Bottom Atomic Power Station Exelon Generation Company, LLC P.O. Box 160 Kennett Square, PA 19348 Vice President - Licensing and Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
Peach Bottom Atomic Power Station, Unit Nos. 2 and 3 cc:
Senior Vice President-Mid-Atlantic Operations Exelon Generation Company, LLC 200 Exelon Way, KSA 3-N Kennett Square, PA 19348 Senior Vice President - Operations Support Exelon Generation Company, LLC 200 Exelon Way, KSA 3-N Kennett Square, PA 19348 Director - Licensing and Regulatory Affairs Exelon Generation Company LLC Correspondence Control P.O. Box 160 Kennett Square, PA 19348 Associate General Counsel Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST FOR THE APPLICATION OF ALTERNATIVE SOURCE TERM AT PEACH BOTTOM ATOMIC POWER STATION, UNITS NO. 2 AND 3 DOCKET NOS. 50-277 AND 50-278 By letter dated July 13, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML072570151), Exelon Generation Company, LLC (the licensee),
submitted a License Amendment Request (LAR) for application of Alternative Source Term at Peach Bottom Atomic Power Station, Units 2 and 3. The Nuclear Regulatory Commission (NRC) staff has reviewed the LAR provided in the July 13, 2007, submittal. In order for the NRC staff to complete its evaluation, response to the following requests for additional information (RAI) questions is requested.
SCVB RAI 1 In Attachment 1, Section 4.3.12, Determination of MSIV [main steam isolation valve] Leak Rates in Various Steam Line Volumes, you state: Since the actual MSIV leak rate is reduced at the accident condition due to the combined effects of compression (due to the high pressure) and expansion (due to the high temperature), the increase in the MSIV leak rates to the environment from the TSVs [turbine stop valves] are conservatively calculated using the Ideal Gas Law and drywell post-LOCA [Loss-of-Coolant Accident] peak pressure and temperature.
Please clarify the statement that actual MSIV leakage rate is reduced at the same time that the MSIV leak rates are increased.
SCVB RAI 2 The Control Room Fuel Handling Accident dose is analyzed for the Turbine Building /Reactor Building Ventilation Stack Release in Attachment 1, Section 4.4.5, Control Room Model.
Please discuss the ventilation systems relied upon for the Turbine Building /Reactor Building Ventilation Stack Release with regard to their safety classification, use of emergency power, and surveillance testing. If these systems are not safety-related please justify their use as the only release pathway.
Enclosure
SCVB RAI 3 In Attachment 2, modified Unit 2 and Unit 3 Technical Specification 3.6.4.1, Secondary Containment, you propose adding SR 3.6.4.1.4 to verify that the secondary containment can be maintained 0.25 inch of vacuum water gauge for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> using one Standby Gas Treatment (SGT) subsystem at a flow rate 10,500 cubic feet per minute (cfm). Technical Specification 5.5.7, Ventilation Filter Testing Program, indicates that the SGT high efficiency particulate air (HEPA) filters and the SGT charcoal adsorber are both tested at a flow rate of 7200 to 8800 cfm. Please discuss this apparent discrepancy. If the intention is to downgrade the SGT HEPA filters and the SGT charcoal adsorber, please discuss this downgrade with respect to Regulatory Guide 1.183, Alternative Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors, Regulatory Position 1.1.2, Defense in Depth.