ML16152A126

Nuclear Regulatory Commission Plan for the Audit of Northern States Power Company Minnesota'S Flood Hazard Reevaluation Report Submittal Relating to the Near-Term Task Force Recommendation 2.1-Flooding Prairie Island Nuclear Generating Plan

ML16152A126
Person / Time
Site:	Prairie Island
Issue date:	06/07/2016
From:	Victor Hall Japan Lessons-Learned Division
To:	Northard S Northern States Power Company, Minnesota
HALL V, NRR/JLD, 415-2915
References
CAC MF7710, CAC MF7711
Download: ML16152A126 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 7, 2016 Mr. Scott D. Northard Acting Site Vice President Northern States Power Company - Minnesota Prairie Island Nuclear Generating Plant 1717 Wakonade Drive East Welch, MN 55089-9642

SUBJECT:

NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF NORTHERN STATES POWER COMPANY - MINNESOTA'S FLOOD HAZARD REEVALUATION REPORT SUBMITTAL RELATING TO THE NEAR-TERM TASK FORCE RECOMMENDATION 2.1-FLOODING PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1AND2 (CAC NOS. MF7710, MF7711)

Dear Mr. Northard:

This letter documents the U.S. Nuclear Regulatory Commission (NRC) staff's plan to perform a regulatory audit of Northern States Power Company's (the licensee), doing business as Xcel Energy, supporting calculations for the Flood Hazard Reevaluation Report (FHRR) submittal related to the Near-Term Task Force Recommendation 2.1, Flooding for Prairie Island Nuclear Generating Plant, Units 1 and 2 (Prairie Island). This technical audit will be performed consistent with NRC Office of Nuclear Reactor Regulation , Office Instruction LIC-111 , and "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 Prairie Island FHRR, which was submitted by letter dated May 9, 2016 (ADAMS Accession No. ML16133A041).

Specifically, the audit will provide the NRC with a better understanding of the analyses of the flooding hazards presented in the Prairie Island 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 NRC staff discussed the details of this audit with Mrs. Lynne Gunderson and Mr. Gene Eckholt of your staff.

S. Northard If you have any questions, please contact me at (301) 415-6185 or by e-mail at Victor.Hall@nrc.gov.

Victor Hall , Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306

Enclosure:

Audit Plan cc w/encl : Distribution via Listserv

NRC PLAN FOR THE AUDIT OF NORTHERN STATES POWER COMPANY - MINNESOTA'S FLOODING HAZARD REEVALUATION REPORT SUBMITTAL RELATING TO THE NEAR-TERM TASK FORCE RECOMMENDATION 2.1-FLOODING FOR PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1AND2 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 (1 O 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 May 9, 2016, Northern States Power Company - Minnesota (NSPM , the licensee), doing business as Xcel Energy, submitted its Flood Hazard Reevaluation Report (FHRR) for Prairie Island Nuclear Generating Plant, Units 1 and 2 (Prairie Island) (Agencywide Documents Access and Management System Accession No. ML16133A041 ). The NRC staff has begun its review of the aforementioned submittals and plans to conduct a regulatory audit of NSPM to aid in its review of the licensee's FHRR.

REGULA TORY AUDIT SCOPE AND METHODOLOGY:

The areas of focus for the regulatory audit is the information contained in the Prairie Island 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 a small number of meetings that are to be determined , as necessary.

Enclosure

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 Victor Hall NRC Branch Chief, NRO/DSEA Aida Rivera-Varona NRC Technical Lead Peter Chaput NRC Technical Support To Be Determined Oak Ridge National Laboratory Technical Support To Be Determined Taylor Engineering LOGISTICS:

The audit meetings will be coordinated with NSPM 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.

ML16152A126 OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/LA NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME VHall Slent MShams VHall DATE 05/27/2016 05/31/2016 06/07/2016 06/07/2016