ML111180060
| ML111180060 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 04/26/2011 |
| From: | David Helker Exelon Nuclear, Exelon Generation Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML111180060 (2) | |
Text
Exen 10 CFR 50.90 April 26, 2011 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Peach Bottom Atomic Power Station, Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-277 and 50-278
Subject:
Withdrawal of Request for Amendment to Technical Specification 3.1.7, Standby Liquid Control (SLC) System
References:
1)
Letter from P. B. Cowan (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, Request for Amendment to Technical Specification 3.1.7, Standby Liquid Control (SLC) System dated March 24, 2010 2)
Letter from J. D. Hughey (U.S. Nuclear Regulatory Commission) to M. J.
Pacilio (Exelon Generation Company, LLC), Peach Bottom Atomic Power Station, Units 2 And 3: Nonacceptance Of License Amendment Request Related To Extending Completion Time for Technical Specification 3.1.7, Standby Liquid Control System dated July 12, 2010 3)
Letter from P. B. Cowan (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, Supplement to the Request for Amendment to Technical Specification 3.1.7, Standby Liquid Control (SLC) System dated July 23, 2010 4)
Letter from D. P. Heiker (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, Supplement to the Request for Amendment to Technical Specification 3.1.7, Standby Liquid Control (SLC) System dated January 20, 2011 By letter to the Nuclear Regulatory Commission (NRC) dated March 24, 2010, Exelon Generation Company, LLC, (Exelon) submitted a request to revise the Technical Specifications (TS) for the Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3 (Reference 1). The proposed change would revise TS Section 3.1.7, Standby Liquid Control (SLC) System, to extend the Completion Time for Condition C (i.e., two SLC subsystems inoperable for reasons other than Condition A) from 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
10 CFR 50.90 April 26, 2011 U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D.C. 20555-0001 Peach Bottom Atomic Power Station, Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-277 and 50-278
Subject:
Withdrawal of Request for Amendment to Technical Specification 3.1.7, "Standby Liquid Control (SLC) System"
References:
1)
Letter from P. B. Cowan (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, "Request for Amendment to Technical Specification 3.1.7, "Standby Liquid Control (SLC) System"" dated March 24, 2010 2)
Letter from J. D. Hughey (U.S. Nuclear Regulatory Commission) to M. J.
Pacilio (Exelon Generation Company, LLC), "Peach Bottom Atomic Power Station, Units 2 And 3: Nonacceptance Of License Amendment Request Related To Extending Completion Time for Technical Specification 3.1.7, Standby Liquid Control System" dated July 12, 2010 3)
Letter from P. B. Cowan (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, "Supplement to the Request for Amendment to Technical Specification 3.1.7, "Standby Liquid Control (SLC) System lll
' dated July 23, 2010 4)
Letter from D. P. Helker (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, "Supplement to the Request for Amendment to Technical Specification 3.1.7, "Standby Liquid Control (SLC) System"" dated January 20, 2011 By letter to the Nuclear Regulatory Commission (NRC) dated March 24, 2010, Exelon Generation Company, LLC, (Exelon) submitted a request to revise the Technical Specifications (TS) for the Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3 (Reference 1). The proposed change would revise TS Section 3.1.7, "Standby Liquid Control (SLC) System," to extend the Completion Time for Condition C (I.e., two SLC subsystems inoperable for reasons other than Condition A) from 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
U.S. Nuclear Regulatory Commission April 26, 2011 Page 2 By letter to Exelon dated July 12, 2010 (Reference 2), the NRC provided the results of the NRC staffs acceptance review of this amendment request. The NRC staff concluded that additional information was necessary to enable the NRC staff to make an independent assessment regarding the acceptability of the proposed amendment request Exelon supplemented the License Amendment Request addressing the NRCs information request on July 23, 2010 (Reference 3)
On January 20, 2011 Exelon submitted an additional supplement (Reference 4) to revise the requested extension of the Completion Time duration from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to provide additional margin beyond what was justified by the PRA analysis.
After further consideration, Exelon hereby withdraws the PBAPS SLC AOT Extension License Amendment Request.
There are no regulatory commitments contained in this leffer.
If you have any questions or require additional information, please contact Mr. Doug Walker at (610) 765-5952.
Respectfully, David P. Helker Manager
- Licensing and Regulatory Affairs Exelon Generation Company, LLC cc:
USNRC Region I, Regional Administrator USNRC Project Manager, NRR
- Peach Bottom Atomic Power Station USNRC Senior Resident Inspector
- Peach Bottom Atomic Power Station S. T. Gray, State of Maryland R. R. Janati, Bureau of Radiation Protection, Commonwealth of Pennsylvania U.S. Nuclear Regulatory Commission April 26, 2011 Page 2 By letter to Exelon dated July 12, 2010 (Reference 2), the NRC provided the results of the NRC staff's acceptance review of this amendment request. The NRC staff concluded that additional information was to enable the NRC staff to make an independent assessment regarding the acceptability of the proposed amendment request. Exelon supplemented the License Amendment Request addressing the NRC's information request on July 23, 2010 (Reference 3). On January 20, 2011, Exelon submitted an additional supplement (Reference 4) to revise the requested extension of the Completion Time duration from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to provide additional margin beyond what was justified by the PRA analysis.
After further consideration, Exelon hereby withdraws the PBAPS SLC AOT Extension License Amendment Request.
There are no regulatory commitments contained in this letter.
If you have any questions or require additional information, please contact Mr. Doug Walker at (610) 765-5952.
Respectfully, David P. Helker Manager - Licensing and Regulatory Affairs Exelon Generation Company, LLC cc:
USNRC Region I, Regional Administrator USNRC Project Manager, NRR - Peach Bottom Atomic Power Station USNRC Senior Resident Inspector - Peach Bottom Atomic Power Station S. T. Gray, State of Maryland R. R. Janati, Bureau of Radiation Protection, Commonwealth of Pennsylvania