ML16202A414

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

ML16202A414
Person / Time
Site:	Columbia
Issue date:	08/11/2016
From:	Gibson L K Japan Lessons-Learned Division
To:	Reddemann M E Energy Northwest
Minarik, Anthony 301-415-6185
References
CAC MF3039
Download: ML16202A414 (3)

Text

OFFICIAL YSE ONLY SECURITY RELATED INFORMATION UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Mark E. Reddemann Chief Executive Officer Energy Northwest MD 1023 76 North Power Plant Loop P.O. Box 968 Richland, WA 99352 August 11, 2016

SUBJECT:

COLUMBIA GENERATING STATION-TRANSMITTAL OF U.S. ARMY CORPS OF ENGINEERS FLOOD HAZARD REEVALUATION INFORMATION (CAC NO. MF3039)

Dear Mr. Reddemann:

The purpose of this letter is to transmit the U.S. Army Corps of Engineers (USAGE) portion of the Columbia Generating Station (Columbia) 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 letter dated October 4, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 13284A075), Energy Northwest (EN, the licensee), requested assistance from the U.S. Nuclear Regulatory Commission (NRG) in obtaining information from USAGE to support EN's development of a report documenting the FHR in response to the March 12, 2012, request for information (ADAMS Accession No. ML 12073A348).

The NRG staff held meetings to discuss the details of the information being provided by USAGE with EN and the USAGE on the following dates:

• June 10, 2014 (summary at ADAMS Accession No. ML 14168A045)

• June 9, 2016 (summary at ADAMS Accession No. ML 16167 A460) These meetings were closed to the public due to the discussion of security-related information.

The enclosure to this letter contains the results of the USAGE flood hazard reevaluation.

The licensee needs to consider the USAGE results for Columbia as part of its flood hazard reevaluation report, which is due to the NRG within 60 days of this letter (October 10, 2016). The information contained in the enclosure was developed in accordance with Japan Learned Directorate (JLD) interim staff guidance (ISG) JLD-ISG-2013-01, "Interim Staff Guidance For Assessment of Flooding Hazards Due to Dam Failure," dated July 29, 2013 (ADAMS Accession No. ML 13151A153), and on the USAGE knowledge of the river system. The enclosure to this letter contains Security-Related Information.

When separated from the enclosure, this letter is DECONTROLLED.

OFFICIAL USE ONLY -SECURITY-RELATED INFORMATION M. Reddemann If you have any questions, please contact me at (301) 415-1056 or by e-mail at Lauren.Gibson@nrc.gov.

Docket No. 50-397

Enclosure:

CD containing USAGE FHR spreadsheets, plots, and GIS files cc w/o encl: Distribution via Listserv Sincerely, Lauren K. Gibson, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation OFFICIAL USE ONLY -SECURITY-RELATED INFORMATION OFFICIAL USE ONLY SECURITY RELATED INFORMATION M. Reddemann If you have any questions, please contact me at (301) 415-1056 or by e-mail at Lauren.Gibson@nrc.gov.

Docket No. 50-397

Enclosure:

Sincerely, IRA/ Lauren K. Gibson, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation CD containing USAGE FHA spreadsheets, plots, and GIS files cc w/o encl: Distribution via Listserv DISTRIBUTION:

PUBLIC (LETTER ONLY) JHMB R/F RidsNrrDorlLpl4-1 Resource RidsNrrLASLent Resource RidsNrrPMColumbia Resource RidsNsirDspRsps Resource RidsRgn4MailCenter Resource BHarvey, NRO CCook, NRO GBowman, NRR ADAMS Accession Nos.: Pkg: ML 16202A421; Letter: ML 16202A414 KSee, NRO ACampbell NRO PChaput, NRO LGibson, NRR *via e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/LA NRR/JLD/JHMB/BC(A)

NAME AMinarik SLent EBowman DATE 07/19/2016 07/20/2016 08/10/2016 OFFICE N RO/DSEA/RH M1 /BC NRR/JLD/JHMB/PM NAME CCook LKGibson DATE 08/10/2016 08/11/2016 OFFICIAL RECORD COPY OFFICIAL USE ONLY SECURITY RELATED INFORMATION