ML18143B610

Ltr Dated 5/17/18 NRC Office of Investigations Assist No. 3-2018-006F

ML18143B610
Person / Time
Site:	Byron
Issue date:	05/17/2018
From:	Jeffers M NRC/RGN-III
To:	Bryan Hanson Exelon Generation Co
References
3-2018-006F, OI 3-2018-006F
Download: ML18143B610 (2)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION REGION III 2443 WARRENVILLE ROAD, SUITE 210 LISLE, IL 60532-4352 May 17, 2018 Mr. Bryan C. Hanson Senior Vice President, Exelon Generation Co., LLC President and Chief Nuclear Officer, Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

NRC OFFICE OF INVESTIGATIONS ASSIST NO. 3-2018-006F

Dear Mr. Hanson:

This refers to transcribed interviews of four Exelon individuals conducted by the U.S. Nuclear Regulatory Commission (NRC) Office of Investigations (OI) in March 2018. The purpose of the interviews was to understand the circumstances that led to a change to Byron Station Procedure BFR-H.1, Response to Loss of Secondary Heat Sink, which authorized the use of the Auxiliary Feedwater System unit cross-tie. Based on the interviews, we determined that an OI investigation is not warranted. However, the regulatory aspects of this matter continue to be reviewed under our routine inspection process.

If you have any questions regarding this matter, please contact me at (630) 829-9798.

In accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390 of the NRC's Rules of Practice, a copy of this letter, and your response, if you choose to provide one, will be available electronically for public inspection in the NRC Public Document Room or from the NRC's Agencywide Documents Access and Management System (ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Sincerely,

/RA J. Benjamin for/

Mark T. Jeffers, Acting Chief Engineering Branch 2 Division of Reactor Safety Docket Nos. 50-454 and 50-455 License Nos. NPF-37 and NPF-66 cc: Associate General Counsel, Exelon Director, Licensing and Regulatory Affairs, Exelon

B. Hanson File No. RIII-2018-A-0005 Letter to B. Hanson from M. Jeffers; dated May 17, 2018

SUBJECT:

NRC OFFICE OF INVESTIGATIONS ASSIST NO. 3-2018-006F bcc: AMS File No. RIII-2018-A-0005 DOCUMENT NAME: G:\ORAIII\EICS\ALLEGATIONS\AMS-LTRS\18 AMS\180005 Byron AFW\130080 OI Assist to lic.docx To receive a copy of this document, indicate in the box: "C" = Copy without attachment/enclosure "E" = Copy with attachment/enclosure "N" = No copy OFFICE RIII N RIII N RIII N NAME Pelke Skokowski Jeffers JBenjamin for DATE 05//18 05/17/18 05/17/18 OFFICIAL RECORD COPY