ML110740158
| ML110740158 | |
| Person / Time | |
|---|---|
| Site: | Kewaunee  |
| Issue date: | 03/14/2011 |
| From: | Price J Dominion Energy Kewaunee |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 10-063B, TAC ME4011 | |
| Download: ML110740158 (3) | |
Text
Dominion Energy Kewaunee, Inc.
5000 Dominion Boulevard, Glen Allen, VA 23060 March 14, 2011 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Serial No. 10-063B L1C/JG/RO Docket No. 50-305 License No. DPR-43 DOMINION ENERGY KEWAUNEE, INC.
KEWAUNEE POWER STATION CLARIFYING RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION:
LICENSE AMENDMENT REQUEST 236, AUTOMATIC OPERATION OF TRANSFORMER LOAD TAP CHANGERS (TAC NO. ME4011)
By application dated June 1, 2010 (reference 1), and as supplemented January 18, 2011 (reference 2), Dominion Energy Kewaunee, Inc. (DEK), requested an amendment to Facility Operating License Number DPR-43 for Kewaunee Power Station (KPS). The proposed amendment would revise the KPS current licensing basis (CLB) to allow the use of new automatic load tap changers (LTCs) in both manual and automatic mode on new transformers that provide offsite power to KPS.
During a telephone call between DEK and Nuclear Regulatory Commission (NRC) staff on March 7, 2011, NRC staff requested clarification regarding a response to an NRC request for additional information (RAI) related to the proposed amendment (reference 2). The response to NRC RAI Question 2 discussed a failure analyses summary of the electrical buses, but did not provide a concluding statement for the analyses results regarding whether a potential single failure could result in Buses 1-5 and 1-6 being transferred to a single offsite power source.
As stated in the Question 2 failure analysis summary, the KPS accident analyses postulate that either all offsite power would be available or no offsite power would be available.
The analyses performed in response to NRC Question 2 (reference 2) concluded that a single failure of the bus transfer scheme will not result in transfer of Buses 1-5 and 1-6 to a single source of offsite power during a design basis event.
This clarification has no impact on any other aspect of License Amendment Request 236.
Serial No. 10-0638 LAR 236 Clarifying Response Page 2 of 3 If you have any questions or require additional information, please contact Mr. Jack Gadzala at 920-388-8604.
Sincerely, rice sident - Nuclear Engineering COMMONWEALTH OF VIRGINIA'
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COUNTY OF HENRICO
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The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by J. Alan Price, who is Vice President - Nuclear Engineering of Dominion Energy Kewaunee, Inc.
He has affirmed before me that he is duly authorized to execute and file the foregoing document in behalf of that Company, and that the statements in the document are true to the best of his knowledge and belief.
~\\J:Lrtc otary Public Acknowledged before me this 14-H.u day of NClY0U My Commission Expires:
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References:
Commitments made in this letter: None GINGER LYNN MELTON Notary PUblic Commonwealth of Virginia
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- 1. Letter from L. N. Hartz (DEK) to Document Control Desk (NRC), "License Amendment Request 236, Automatic Operation of Transformer Load Tap Changers," dated June 1, 2010.
2.
Letter from L. N. Hartz (DEK) to Document Control Desk (NRC), "Supplement and Response to Request for Additional Information:
License Amendment Request 236, Automatic Operation of Transformer Load Tap Changers (TAC NO.
ME4011," dated January 18, 2010.
cc:
Regional Administrator, Region III U. S. Nuclear Regulatory Commission 2443 Warrenville Road Suite 210 Lisle, IL 60532-4352 Mr. K. D. Feintuch Project Manager U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 08-H4A 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Kewaunee Power Station Public Service Commission of Wisconsin Electric Division P.O. Box 7854 Madison, WI 53707 Serial No. 10-0638 LAR 236 Clarifying Response Page 3 of 3