RS-19-021, Withdrawal of License Amendment Request for a One-Time Extension to Byron Station, Units 1 and 2 Technical Specification 3.8.1, AC Sources-Operating, Required Action a

Withdrawal of License Amendment Request for a One-Time Extension to Byron Station, Units 1 and 2 Technical Specification 3.8.1, AC Sources-Operating, Required Action a

ML19039A272
Person / Time
Site:	Byron
Issue date:	02/08/2019
From:	Gullott D Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
EPID L-2018-LLA-0218, RS-19-021
Download: ML19039A272 (2)

Text

4300 Winfield Road Warrenville, IL 60555 Exelon Generation 630 657 2000 Office RS-19-021 10 CFR 50.90 February 8, 2019 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Byron Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. STN 50-454 and STN 50-455

Subject:

Withdrawal of License Amendment Request for a One-Time Extension to Byron Station, Units 1 and 2 Technical Specification 3.8.1, "AC Sources-Operating,"

Required Action A.2

References:

1. Letter from D. M. Gullett (Exelon Generation Company, LLC (EGC)) to U.S. NRC, "License Amendment Request for a One-Time Extension to Technical Specification 3.8.1, 'AC Sources-Operating,' Required Action A.2,"

dated August 10, 2018

2. Letter from J. S. Wiebe (NRC) to B. C. Hanson (EGC), "Byron Station, Unit Nos. 1 and 2 - Supplemental Information Needed for Acceptance of Requested Licensing Action Re: One-Time Extension of Technical Specification 3.8.1, 'AC Sources-Operating,' A2 Completion Time (EPID L-2018-LLA-0218)," dated December 12, 2018

3. Letter from D. M. Gullett (EGC) to NRC, "Supplemental Information Related to License Amendment Request for a One-Time Extension to Technical Specification 3.8.1, 'AC Sources-Operating,' Required Action A.2," dated December 21, 2018 In Reference 1, Exelon Generation Company, LLC (EGC) requested an amendment to Facility Operating License (FOL) Nos. NPF-37 and NPF-66 for Byron Station, Units 1 and 2. The proposed change to the Byron Station, Units 1 and 2 Technical Specifications (TS) was intended to serve as a contingency to allow the restoration of an inoperable qualified circuit between the offsite transmission network and the onsite Class 1E AC Electrical Power Distribution System that would result from an unanticipated failure of Unit 2 System Auxiliary Transformer (SAT) 242-1.

In Reference 2, the NRC requested supplemental information required to complete its review of Reference 1.

February 8, 2019 U.S. Nuclear Regulatory Commission Page 2 In Reference 3, EGC provided the information requested in Reference 2.

Based on the current schedule for the replacement of Byron Station, Unit 2 SAT 242-2, EGC hereby withdraws its Reference 1 request for amendments to the Byron Station, Units 1 and 2 Technical Specifications.

There are no regulatory commitments contained within this letter.

If you have any questions concerning this letter, please contact Mr. Mitchel A. Mathews at (630) 657-2819.

Respectfully, David M. Gullatt Director - Licensing and Regulatory Affairs Exelon Generation Company, LLC cc: Regional Administrator - NRC Region Ill NRC Senior Resident Inspector - Byron Station Illinois Emergency Management Agency - Division of Nuclear Safety