ML15324A383

Transmittal of U.S. Army Corps of Engineers Flood Hazard Reevaluation Information (Public)

ML15324A383
Person / Time
Site:	Monticello
Issue date:	11/18/2015
From:	Victor Hall Japan Lessons-Learned Division
To:	Gardner P Northern States Power Co
Hall, VE
Shared Package
ML15296A365	List: ML15324A383
References
TAC MF3696
Download: ML15324A383 (3)

Text

-GFFICIAL USE ONLY SECURITY RELATEE> INFORM:~HION UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 18, 2015 Mr. Peter A. Gardner Site Vice President Northern States Power Company - Minnesota Monticello Nuclear Generating Plant 2807 West County Road 75 Monticello, MN 55362-9637

SUBJECT:

MONTICELLO NUCLEAR GENERATING PLANT - TRANSMITTAL OF U.S.

ARMY CORPS OF ENGINEERS FLOOD HAZARD REEVALUATION INFORMATION (TAC NO. MF3696)

Dear Mr. Gardner:

The purpose of this letter is to transmit the U.S. Army Corps of Engineers (USACE) portion of the Monticello Nuclear Generating Plant flood hazard reevaluation (FHR) associated with the assessment of flood hazards due to flooding in streams and rivers, including potential site flooding due to dam failure. By letters dated May 5, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession Nos. ML14065A112 and ML14064A291 ), Northern States Power Company - Minnesota (the licensee), doing business as Xcel Energy (Xcel),

requested assistance from the U.S. Nuclear Regulatory Commission (NRC) in obtaining information from the USACE to support Xcel's development of a report documenting the FHR in response to the March 12, 2012, request for information (ADAMS Accession No. ML12073A348). The NRC staff held meetings to discuss the details of the information being provided by USACE with Xcel and the USACE on the following dates:

• August 5, 2014 (summary at ADAMS Accession No. ML14220A283)

• July 9, 2015 (summary at ADAMS Accession No. ML15271A207)

These meetings were closed to the public due to the discussion of security-related information.

Enclosures 2 and 3 to this letter contain the results of the USACE flood hazard reevaluation and is non-public for security-related Information. Xcel needs to consider the USACE results for Monticello as part of its flood hazard reevaluation report, which is due to the NRC within 180 days of this letter (May 16, 2016). The information contained in the enclosures was developed in accordance with Japan Lessons-Learned Directorate (JLD) interim staff guidance (ISG)

JLD-ISG-2013-01, "Interim Staff Guidance For Assessment of Flooding Hazards Due to Dam Failure," Revision 0, dated July 29, 2013 (ADAMS Accession No. ML13151A153), and on the USACE knowledge of the river system.

Enclosures two and three to this letter contain Security-Related Information.

When separated from Enclosures two and three, this letter and Enclosure one are DECONTROLLED.

OFFICIAL USE ONLY SECURITY*RELATED INFORMATION

OFFICIAL USE ONLY SECURITY-RELATED INFORMATION P. Gardner If you have any questions, please contact me at (301) 415-2915 or by e-mail at Victor.Hall@nrc.gov.

Sincerely, Victor Hall, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket No. 50-263

Enclosures:

1. Description of Information Requested and Transmitted

2. CD containing USACE FHR spreadsheets, plots, and GIS files

3. Hydrographs and Inundation Maps cc w/o encls: Distribution via Listserv OFFICIAL USE ONLY SECURIT'f=RELATED INFORMATION

Pkg: ML15296A365 PUBLIC Letter ML15324A383 NON PUBLICLetter: ML15296A274 *via e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/LA NRR/JLD/JHMB/BC NAME VHall Slent MS hams DATE 10/26/15 11/4/15 11/16/2015 OFFICE NRO/DSENRHM1/BC NRR/JLD/JHMB/PM NAME CCook ARiveraVarona for* VHall DATE 11/2/15 11/18/2015