Safety Evaluation Report, Related to the License Renewal of Byron Station, Units 1 and 2, and Braidwood Station, Units 1 and 2 – Docket Nos. 50-454, 50-455, 50-456, and 50-457 – Exelon Generation Company, LLC – Sections 1 to 3 (NUREG-2190, Volume 1)

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Publication Information

Manuscript Completed: November 2015
Date Published: December 2015

Office of Nuclear Reactor Regulation
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

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Abstract

This safety evaluation report (SER) documents the technical review of the Byron Station, Units 1 and 2, and Braidwood Station, Units 1 and 2, (BBS) license renewal application (LRA) by the United States (U.S.) Nuclear Regulatory Commission (NRC) staff (the staff). By letter dated May 29, 2013, Exelon Generation Company, LLC (Exelon or the applicant), submitted the LRA in accordance with Title 10 of the Code of Federal Regulations (10 CFR) Part 54, "Requirements for Renewal of Operating Licenses for Nuclear Power Plants." Exelon requests renewal of the BBS operating licenses (Operating License Nos. NPF-37, NPF-66, NPF-72, and NPF-77, respectively) for a period of 20 years beyond the current expiration at midnight October 31, 2024; November 6, 2026; October 17, 2026; and December 18, 2027, respectively.

Byron is located in north central Illinois, near the town of Byron, Illinois, and near the Rock River approximately 95 miles from Chicago, Illinois. The Braidwood Station is located in northeastern Illinois, near the town of Braidwood, Illinois, and near the Kankakee River approximately 60 miles from Chicago, Illinois. The NRC issued the Byron construction permit on December 31, 1975, and operating licenses on February 14, 1985 (Unit 1), and January 30, 1987 (Unit 2). The NRC issued the Braidwood construction permit on December 31, 1975, and operating licenses on July 2, 1987 (Unit 1), and May 20, 1988 (Unit 2). Each BBS unit has a Westinghouse Electric Corporation (Westinghouse) four-loop pressurized water reactor (PWR) and a turbine-generator furnished by Westinghouse. For both stations, Babcock & Wilcox supplied the steam generators for Unit 1, and Westinghouse supplied the steam generators for Unit 2. Sargent & Lundy was the architect-engineer for both stations. Each containment is a PWR dry ambient containment structure. The BBS licensed power outputs are about 3,645 megawatts thermal with a gross electrical output of approximately 1,260 megawatts electric.

Unless otherwise indicated, this SER presents the status of the staff's review of information submitted through April 17, 2015, the cutoff date for consideration in the SER. The two open items previously identified in the SER with Open Items, issued October 30, 2014, have been closed (see Section 1.5); therefore, no open items remain to be resolved before the final determination is reached by the staff on the LRA.