RS-11-031, Supplemental Information Related to License Amendment Request for Adoption of Technical Specifications Task Force-501
| ML110670305 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 03/08/2011 |
| From: | Hansen J Exelon Generation Co, Exelon Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RS-11-031, TAC ME4850 | |
| Download: ML110670305 (3) | |
Text
Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 www,exeloncorp.com Exe Nuclear RS-1 1-031 March 8, 2011 10 CFR 50.90 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket No. 50-461
Subject:
Supplemental Information Related to License Amendment Request for Adoption of Technical Specifications Task Force-501 (TAC No. ME4850)
References:
1.
Letter from J. L. Hansen (Exelon Generation Company, LLC (EGC)) to U. S. NRC, "License Amendment Request for Adoption of Technical Specifications Task Force (TSTF) Traveler TSTF-501, Revision 1, 'Relocate Stored Fuel Oil and Lube Oil Volume Values to Licensee Control,"'
dated October 8, 2010 2.
Letter from U. S. NRC to Mr. M. J. Pacilio (EGC), "Clinton Power Station, Unit No. 1 - Request for Additional Information Related to Request for Adoption of Technical Specification Task Force-501 (TAG No. ME4850),"
dated December 7, 2010 3.
Letter from P. R. Simpson (EGC) to U. S. NRC, "Response to Request for Additional Information Regarding License Amendment Request for Adoption of Technical Specifications Task Force (TSTF) Traveler TSTF-501, Revision 1, 'Relocate Stored Fuel Oil and Lube Oil Volume Values to Licensee Control,' (TAC No. ME4850)," dated January 6, 2011 4.
Letter from U. S. NRC to Mr. M. J. Pacilio (EGC), "Clinton Power Station, Unit No. 1 - Request for Additional Information Related to Request for Adoption of Technical Specification Task Force-501 (TAC No. ME4850),"
dated January 21, 2011 5.
Letter from J. L. Hansen (EGC) to U. S. NRC, "Response to Request for Additional Information Related to License Amendment Request for Adoption of Technical Specifications Task Force-501 (TAC No. ME4850),"
dated February 24, 2011
March 8, 2011 U. S. Nuclear Regulatory Commission Page 2 In Reference 1, Exelon Generation Company, LLC (EGC) requested an amendment to Appendix A, Technical Specifications (TS), of Facility Operating License No. NPF-62 for Clinton Power Station, Unit 1 (CPS). The proposed change modifies the CPS TS by implementing the guidance found in Technical Specifications Task Force (TSTF) Traveler TSTF-501, "Relocate Stored Fuel Oil and Lube Oil Volume Values to Licensee Control," Revision 1. In Reference 2, the NRC requested that EGC provide additional information in support of their review of Reference 1. The information requested in Reference 2 was provided in Reference 3. In Reference 4, the NRC requested that EGC provide additional information in support of their review of Reference 1. The information requested in Reference 4 was provided in Reference 5.
Upon further review of the information provided in Reference 5, EGC determined that clarification is required related to the EGC response to Reference 4, Request No. 3. That clarification is provided in the Attachment to this letter.
The information provided in this letter does not affect the No Significant Hazards Consideration, or the Environmental Consideration provided in Attachment 1 of the original license amendment request as described in the Reference 1 submittal.
In accordance with 10 CFR 50.91(b), "State consultation," EGC is providing the State of Illinois with a copy of this letter and its attachment to the designated State Official.
This letter contains no new regulatory commitments. If you have any questions concerning this letter, please contact Mr. Mitchel A. Mathews at (630) 657-2819.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 8th day of March, 2011.
Jeffr
{Hansen Man r - Licensing Exelon Generation Company, LLC
Attachment:
Supplemental Information Supporting the Clinton Power Station Request for Adoption of Technical Specifications Task Force-501
ATTACHMENT Supplemental Information Supporting the Clinton Power Station Request for Adoption of Technical Specifications Task Force-501 Following is Request No. 3 from Reference 1:
- 3. Does the Clinton Power Station fuel oil volume calculation method yield conservative results compared to the American National Standards Institute (ANSI) N195-1976 method (i.e., account for the 10 percent margin, account for the fuel oil volume consumed by testing) for each EDG?
Revised Exelon Generation Company. LLC (EGC) Response:
The table below describes the Clinton Power Station, Unit 1 (CPS) stored fuel oil volume requirements considering the time-dependent loading postulated in Reference 2, including fuel oil consumed by testing (i.e., T Value from ANSI N195-1976 Section 5.4), 10% margin, and additional fuel oil to account for vortexing in the associated fuel oil storage tank (V).
Fuel consumption is calculated based on the worst-case loading of the three postulated scenarios. These results show that there is margin to required stored fuel oil volume in the CPS calculation method, and that the CPS method is conservative compared to the N195-1976 method for each emergency diesel generator (EDG). Additionally, the stored fuel oil requirement for the Division 1 EDG was adjusted upward by one gallon to account for truncation in the calculation (i.e., 46,346 gallons versus the previously provided 46,345 gallons).
Table:
Comparison of the Clinton Power Station Stored Fuel Oil Volume Calculation Method to the ANSI N195-1976 Method Required Stored Fuel Oil Based on Time-Required D pendent Loads al Stored Fuel Oil Fuel Oil Storage Divisional 110°a*(Time According Tank EDG Time to the CPS Design Dependent T
V Dependent + T) +
Calculation Capacity V
Method (gal)
(gal) 1 41274 570 318 46346 51000 54000 2
39114 502 318 43896 45000 54000 3
18684 311 269 21164 29500 36000
References:
1.
Letter from U. S. NRC to Mr. M. J. Pacilio (EGC), "Clinton Power Station, Unit No. 1 -
Request for Additional Information Related to Request for Adoption of Technical Specification Task Force-501 (TAC No. ME4850)," dated January 21, 2011 2.
Letter from J. L. Hansen (EGC) to U. S. NRC, "Response to Request for Additional Information Related to License Amendment Request for Adoption of Technical Specifications Task Force-501 (TAC No. ME4850)," dated February 24, 2011 Page 1 of 1