ML15230A273

Nuclear Regulatory Commission Plan for Audit of Exelon Generation Company Llc'S Flood Hazard Reevaluation Report Submittal Relating to the Near-Term Task Force Recommendation 2.1 Flooding for Three Mile Island Nuclear Station, Unit 1

ML15230A273
Person / Time
Site:	Three Mile Island
Issue date:	08/26/2015
From:	Govan T V Japan Lessons-Learned Division
To:	Bryan Hanson Exelon Nuclear
Govan, Tekia NRR/JLD 415-6197
References
TAC MF1113
Download: ML15230A273 (5)

Text

Mr. Bryan C. Hanson UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 26, 2015 President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 SUBJECT: NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF EXELON GENERATION COMPANY, LLC'S FLOOD HAZARD REEVALUATION REPORT SUBMITTAL RELATING TO THE NEAR-TERM TASK FORCE RECOMMENDATION 2.1-FLOODING FOR THREE MILE ISLAND NUCLEAR STATION, UNIT 1 (TAC NO. MF1113) Dear Mr. Hanson: This letter documents the U.S. Nuclear Regulatory Commission (NRC) staff's plan to perform a regulatory audit of Exelon Generation Company, LLC's (the licensee) supporting calculations for the Flood Hazard Reevaluation Report (FHRR) submittal related to the Near-Term Task Force Recommendation 2.1, Flooding for Three Mile Island Nuclear Station, Unit 1 (TMI). This technical audit will be performed consistent with NRC Office of Nuclear Reactor Regulation, Office Instruction LIC-111, "Regulatory Audits," dated December 29, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML082900195). The audit will be conducted over multiple sessions, as needed, and the NRC staff will develop an audit summary report to document its observations and conclusions within 90 days of the final audit session. The audit will provide the NRC staff with a better understanding of the TMI FHRR. which was submitted on August 13, 2015 (ADAMS Accession No. ML 15225A266). Specifically, the audit will provide the NRC staff with a better understanding of the analyses of the flooding hazards presented in the TMI FHRR. The audit is intended to support completion of the staff's review of the FHRR and the subsequent issuance of a Staff Assessment. The enclosed audit plan outlines the process that will allow the: NRC staff to identify additional information potentially necessary for licensees to supplement their FHRRs, and resolve potential technical concerns. The details of this audit have been discussed with Mr. Dave Distel of your staff.

8. Hanson -2 -If you have any questions, please contact me at (301) 415-6197 or by e-mail at Tekia.Govan@nrc.gov. Docket No. 50-289 Enclosure: Audit Plan cc w/encl: Distribution via Listserv Sincerely, Tekia V. Govan, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation NRC PLAN FOR THE AUDIT OF EXELON GENERATION COMPANY, LLC'S FLOOD HAZARD REEVALUATION REPORT SUBMITTAL RELATING TO THE NEAR-TERM TASK FORCE RECOMMENDATION 2.1-FLOODING FOR THREE MILE ISLAND NUCLEAR STATION, UNIT 1 BACKGROUND AND AUDIT BASIS By letter dated March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued a request for information to all power reactor licensees and holders of construction permits in active or deferred status, pursuant to Title 10 of the Code of Federal Regulations (10 CFR), Section 50.54(f) "Conditions of license" (hereafter referred to as the "50.54(f) letter"). The request was issued in connection with implementing lessons-learned from the 2011 accident at the Fukushima Dai-ichi nuclear power plant, as documented in The Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident. Recommendation 2.1 of that document recommended that the staff issue orders to all licensees to reevaluate seismic and flooding for their sites against current NRC requirements and guidance. Subsequent Staff Requirements Memoranda associated with Commission Papers SECY 11-0124 and SECY-11-0137, instructed the NRC staff to issue requests for information to licensees pursuant to 10 CFR 50.54(f). By letter dated August 13, 2015, Exelon Generation Company, LLC (Exelon, the licensee) submitted its Flood Hazard Reevaluation Report (FHRR) for Three Mile Island Nuclear Station, Unit 1 (TMI) (Agencywide Documents Access and Management System Accession No. ML 15225A266). The NRC staff has begun its review of the aforementioned submittals and plans to conduct a regulatory audit of Exelon to aid in its review of the licensee's FHRR. REGULATORY AUDIT SCOPE AND METHODOLOGY The areas of focus for the regulatory audit is the information contained in the TMI FHRR submittal, and all associated and relevant supporting documentation used in the development of the aforementioned document including, but not limited to, methodology, process information, calculations, computer models, etc. The audit will be conducted and completed over several meetings that are to be determined, as necessary. Enclosure

-2 -INFORMATION AND OTHER MATERIAL NECESSARY FOR THE REGULATORY AUDIT The information required for the audit is the licensee's models and supporting calculations, as well as documentation related to the storm surge and site specific probable maximum precipitation analyses. Other information needs will be discussed as audit meetings are scheduled. NRC AUDIT TEAM Title Team Member Affiliation Team Leader, NRR/JLD Tekia Govan NRC Branch Chief, NRO/DSEA Chris Cook NRC Technical Lead Ken Lee NRC Technical ManaQer Laura Quinn-Willingham NRC Technical Support Various Contractors Department of Energy National Laboratory LOGISTICS The audit meetings will be coordinated with Exelon staff. DELIVERABLES The NRC team will develop an audit summary report to convey the audit results. The report will be placed in ADAMS within 90 days of the completion of the final audit session, and will be publicly available. The information discussed in the audit may be included, fully or in part, in the development of the NRC technical staff's assessments as a result of the FHRR review.

B. Hanson -2 -If you have any questions, please contact me at (301) 415-6197 or by e-mail at Tekia.Govan@nrc.gov. Docket No. 50-289 Enclosure: Audit Plan cc w/encl: Distribution via Listserv DISTRIBUTION: PUBLIC JLD R/F RidsNRRJLD Resource KSee, NRO CCook, NRO JBowen, NRR RidsNrrDorllpl1-2 MShams, NRR ARivera, NRO BHarvey,NRO ADAMS Accession No.: ML15230A273 Sincerely, IRA/ Tekia V. Govan, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation LQuinn-Willingham, NRO RidsNrrPMThreeMilelsland KErwin, NRO BHayes, NRO MFranovich, NRR OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/LA NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME TGovan Slent MShams TGovan DATE 08/19/15 08/21/15 08/21/15 08/26/15 OFFICAL RECORD COPY