GO2-14-055, Updated Dam Screening Analysis in Support of Energy Northwest'S Request for the Us Army Corps of Engineers (Usace) Dam Failure Analysis Support

Updated Dam Screening Analysis in Support of Energy Northwest'S Request for the Us Army Corps of Engineers (Usace) Dam Failure Analysis Support

ML14121A116
Person / Time
Site:	Columbia
Issue date:	04/14/2014
From:	Swank D Energy Northwest
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML14176B181	List: GO2-14-055, Updated Dam Screening Analysis in Support of Energy Northwest'S Request for the Us Army Corps of Engineers (Usace) Dam Failure Analysis Support
References
GO2-14-055
Download: ML14121A116 (2)

Text

ENERGY NORTHWEST David A. Swank Columbia Generating Station P.O. Box 968, PE04 Richland, WA 99352-0968 Ph. 509-377-2309 I F. 509-377-2354 daswank @ energy-northwest.com April 14, 2014 G02-14-055 10 CFR 50.54(f)U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

COLUMBIA GENERATING STATION, DOCKET NO. 50-397 UPDATED DAM SCREENING ANALYSIS IN SUPPORT OF ENERGY NORTHWEST'S REQUEST FOR THE US ARMY CORPS OF ENGINEERS (USACE) DAM FAILURE ANALYSIS SUPPORT

References:

1.Letter dated March 12, 2012, from E. J. Leeds (NRC) to All Power Reactor Licensees and Holders of Construction Permits in Active or Deferred Status, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident" 2. NRC Interim Staff Guidance JDL-ISG-2013-01, "Guidance for Assessment of Flooding Hazards Due to Dam Failure," Revision 0, July 29, 2013 3. Letter G02-13-141, dated October 4, 2013, from D. A. Swank (Energy Northwest) to NRC, "Energy Northwest's Request for NRC Assistance to Obtain Information from the US Army Corps of Engineers (USACE)Related to Dam Failure Analysis" 4. E-mail dated November 22, 2013, from J. R. Waters, (Energy Northwest) to F. Lyon (NRC), "Preliminary Results of Dam Failure Screenings

-Columbia Generating Station"

Dear Sir or Madam,

In Reference 1, the Nuclear Regulatory Commission (NRC) issued the request for information associated with Near-Term Task Force (NTTF) Recommendation 2.1 for Flooding.

In Reference 2, the NRC staff issued guidance for assessing flooding hazards due to dam failure. In Reference 3, Energy Northwest requested that the NRC interface with the U. S. Army Corps of Engineers (USACE), such that the USACE would perform a dam failure analysis for the Columbia River watershed.

UPDATED DAM SCREENING ANALYSIS IN SUPPORT OF ENERGY NORTHWEST'S REQUEST FOR THE US ARMY CORPS OF ENGINEERS (USACE)DAM FAILURE ANALYSIS SUPPORT Page 2 of 2 In a telephone call on Wednesday, November 13, 2013, Energy Northwest stated that it would identify, no later than Friday, November 15, 2013, the specific dams for which it was requesting the USACE to perform dam failure analyses.

In a November 15, 2013, email, Energy Northwest stated that it was performing screening level analyses, in accordance with JLD-ISG-2013-01 (Reference 2), for the upstream dams addressed in Columbia's Final Safety Analysis Report (FSAR) Table 2.4-1, Major Columbia River Basin Dams, and certain upstream dams which are not addressed in the FSAR table.Energy Northwest also stated that it would report preliminary results of those screenings no later than November 22, 2013. The preliminary results of the upstream dams were provided in Reference 4 which also stated that the downstream dam assessment would be provided upon completion of the assessment.

The attachment to this letter provides Energy Northwest's updated analysis results in support of the request made in Reference 3.There are no new or revised regulatory commitments contained in this letter. If you have any questions or require additional information, please contact Ms. L. L. Williams at (509) 377-8148.Executed on 1 1Pei / a?,,v9'Respectfully, D.A. Swank Assistant Vice President, Engineering

Attachment:

List of Potentially Critical Dams Based on JLD-ISG-2013-01, RO, Screening Methods cc: NRC Region IV Administrator NRC NRR Project Manager NRC Senior Resident Inspector/988C MA Jones -BPA/1 399 (E-mail)