ML112380605
| ML112380605 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/08/2011 |
| From: | John Hughey Plant Licensing Branch 1 |
| To: | Pacilio M Exelon Generation Co |
| Hughey J, NRR/DORL, 301-415-3204 | |
| References | |
| TAC ME6931 | |
| Download: ML112380605 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 September 8, 2011 Mr. Michael J. Pacilio President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNIT 3 - REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST FOR SAFETY LIMIT MINIMUM CRITICAL POWER RATIO CHANGE (TAC NO. ME6931)
Dear Mr. Pacilio:
By letter to the Nuclear Regulatory Commission (NRC) dated June 8, 2011, as supplemented by letter dated August 19, 2011,1 Exelon Generation Company, LLC, (Exelon) submitted a License Amendment Request for Peach Bottom Atomic Power Station (PBAPS), Unit 3. The submittal seeks to revise Technical Specification 2.1.1, "Reactor Core SLs [safety limits]" to reflect revised Safety Limit Minimum Critical Power Ratio (SLMCPR) values for Operating Cycle 19. The NRC staff has reviewed the request submitted by the licensee and determined that additional information is needed as set forth in the Enclosure.
The draft questions were sent to Mr. Thomas Loomis, of 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 September 6, 2011, Mr. Loomis indicated that the licensee will submit a response by September 16, 2011. Please note that if you do not respond to this letter by the agreed-upon date 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.
Sinft i) !PAr-John D. Hughey, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-278
Enclosure:
Request for Additional Information cc: Distribution via ListServ 1 Agencywide Documents Access and Management System (ADAMS) Accession No. ML111600180 and ML112340236. respectively
REQUEST FOR ADDITIONAL INFORMATION RELATED TO LICENSE AMENDMENT REQUEST FOR TECHNICAL SPECIFICATION CHANGES TO SAFETY LIMIT MINIMUM CRITICAL POWER RATIO VALUES PEACH BOTTOM ATOMIC POWER STATION - UNIT 3 DOCKET NO. 50-278 By letter to the Nuclear Regulatory Commission (NRC) dated June 8, 2011, 1 as supplemented by letter dated August 19, 2011,2 Exelon Generation Company, LLC, (Exelon) submitted a License Amendment Request for Peach Bottom Atomic Power Station, Unit 3. The submittal seeks to revise Technical Specification 2.1.1, "Reactor Core SLs [safety limits]" to reflect revised Safety Limit Minimum Critical Power Ratio (SLMCPR) values for operating cycle 19. The NRC staff has reviewed Exelon's response to the NRC Request for Additional Information (RAI) dated August 19, 2001,2 and determined that additional information, as described below, is needed to complete the review.
RAI-08: Identify the sections/pages of Reference 02-1: Global Nuclear Fuel, "General Electric Standard Application for Reactor Fuel (GESTAR II)," NEDE-24011 P-A-18 and NEDE 24011 P-A-18-US, April 2011, that are applicable to the inputs identified in the response to RAI-02.
2 In addition, provide a quantitative range for the referenced thermal limit margins and the reactivity margins.
RAI-09: Identify the sections/pages of Reference 03-1: Global Nuclear Fuel, "General Electric Standard Application for Reactor Fuel (GESTAR II)," NEDE-24011P-A-18 and NEDE 24011 P-A-18-US, April 2011, that describe the SLMCPR calculation related to GNF2 fuel assemblies as discussed in the response to RAI-03.2 RAI-10: Provide the calculation details requested in RAI-05.12 that justify the results listed in Table 3 of Attachment 4 from the June 8, 2011, submittal.3 RAI-11: Explain why the backup stability protection depicted in the power flow operation map contained in Attachment 6 of the June 8, 2011,1submittal extends beyond the applicable region.
RAI-12: Provide the backup stability protection for single loop operation in the power/flow map presented in Attachment 6 of the June 8, 2011,1 submittal.
1 Agencywide Documents Access and Management System (ADAMS) Accession No. ML111600180.
2 ADAMS Accession No. ML112340236.
3 Note that the "Attachment 4" referenced in RAI-10 is the non-publicly available, proprietary version of associated with the submittal dated June 8,2011 (ADAMS Accession No. ML111600180).
Enclosure
- via email OFFICE LPL 1-2/PM LPL1-2/LA SRXB/BC LPL1-2/BC NAME JHughey ABaxter
- TUlses HChernoff DATE 09/08/2011 09/06/2011 09/08/2011 09/08/2011