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MONTHYEARML16132A5122016-05-16016 May 2016 Notice Of Closed Meeting With USACE, NRC And Energy Northwest To Discuss Flood Analysis Associated With Columbia Generating Station Project stage: Request ML16202A4142016-08-11011 August 2016 Transmittal of U.S. Army Corps of Engineers Flood Hazard Reevaluation Information Project stage: Other ML16167A4602016-08-23023 August 2016 Summary of Closed Meeting with Representatives of the Us Army Corps of Engineers, Bureau of Reclamation, and Energy Northwest to Discuss the Flood Analysis Associated with Columbia Generating Station Project stage: Meeting ML16333A0942016-12-0707 December 2016 Current Design Basis Flood Hazards for Use in the MSA Project stage: Other 2016-05-16
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Category:Meeting Summary
MONTHYEARML23297A2642023-11-0606 November 2023 October 5, 2023, Summary of Teleconference with Energy Northwest Regarding Proposed License Amendment Request to Revise the Emergency Plan for Columbia Generating Station ML23156A2822023-06-0505 June 2023 Summary of Meeting with Q & a Session to Discuss the 2022 Annual Assessment of Safety Performance at CGS ML22147A0932022-06-0606 June 2022 2021 Annual Assessment Public Meeting Summary ML22067A1832022-03-10010 March 2022 Summary of Energy Northwest Regulatory Conference Columbia Generating Station, Airborne Radioactivity Event Resulting in Preliminary White Finding, March 1, 2022 ML21321A0422021-12-13013 December 2021 Summary of October 22, 2021, Teleconference Meeting with Energy Northwest Regarding Proposed License Amendment Requests to Adopt Technical Specifications Task Force (TSTF)-505, and 10 CFR 50.69 Categorization Program ML21140A3892021-05-24024 May 2021 Riv Column 1 EOC 2020 Public Meeting Summary ML21112A3512021-05-0303 May 2021 Summary of March 31, 2021, Pre-Application Teleconference with Energy Northwest to Discuss a Planned LAR Deletion of Certain License Conditions Relating to License Renewal Commitments for Columbia Generating Station ML20322A0362020-11-19019 November 2020 Summary of October 19, 2020, Presubmittal Teleconference with Energy Northwest Regarding Proposed COVID-19 Related Biennial Emergency Preparedness Exercise Exemption Request for Columbia Generating Station ML20314A0462020-11-0909 November 2020 Summary of November 4, 2020, NRC-NMFS Teleconference on Columbia Entrainment Study ML20189A2832020-07-0707 July 2020 Summary of Region IV Annual Assessment Public Meeting ML20101L5352020-04-14014 April 2020 Summary of April 6, 2020, Presubmittal Teleconference Meeting with Energy Northwest, to Discuss a Technical Specification Change License Amendment Request for the Columbia Generating Station ML19030A2152019-02-12012 February 2019 1/24/19, Summary of Presubmittal Teleconference Meeting with Energy Northwest, to Discuss a Shield Wall Deferral License Amendment Request for the Columbia Generating Station ML19030A3192019-02-12012 February 2019 1/17/2019, Summary of Presubmittal Meeting with Energy Northwest, to Discuss an Emergency Control Room Chiller License Amendment Request at Columbia Generating Station ML18354B0992019-01-0303 January 2019 Summary of Pre-Submittal Meeting with Energy Northwest, to Discuss an Emergency Control Room Chiller License Amendment Request for the Columbia Generating Station ML16266A3712016-09-29029 September 2016 Summary of Public Meeting with Energy Northwest to Discuss Upcoming License Amendment Request Regarding Change in Completion Time for Residual Heat Removal Pump a Repair for Columbia Generating Station ML16167A4602016-08-23023 August 2016 Summary of Closed Meeting with Representatives of the Us Army Corps of Engineers, Bureau of Reclamation, and Energy Northwest to Discuss the Flood Analysis Associated with Columbia Generating Station ML16193A0162016-07-14014 July 2016 Summary of 6/30/16 Prelicensing Meeting with Energy Northwest to Discuss License Amendment Request to Revise Emergency Action Levels Based on Nuclear Energy Institute (NEI) 99-01, Revision 6 at Columbia Generating Station ML16138A3762016-05-25025 May 2016 Summary of 5/3/2016 Prelicensing Meeting with Energy Northwest to Discuss License Amendment Request Regarding Emergency Control Room Chiller System at Columbia Generating Station ML16138A3292016-05-24024 May 2016 Summary of 5/2/2016 Prelicensing Meeting with Energy Northwest to Discuss Measurement Uncertainty Recapture Power Uprate License Amendment Request at Columbia Generating Station ML16126A4822016-05-17017 May 2016 Summary of Prelicensing Meeting with Energy Northwest to Discuss License Amendment Request Concerning Portional Reclassification of Reactor Water Cleanup System at Columbia Generating Station ML16138A1682016-05-0202 May 2016 Licensee Presentation Regarding Mur Power Uprate for Columbia Generating Station, Pending LAR ML15187A4442015-07-0606 July 2015 Summary of a Regulatory Conference to Discuss the Safety Significance of a Columbia Finding Emergency Plan Implementing Procedures Did Not Implement Some Protective Action Recommendations Required by the Emergency Plan ML15173A2732015-06-30030 June 2015 Summary of June 4, 2015, Category 1 Public Meeting with Energy Northwest to Discussion Columbia Generating Station Seismic Hazard Reevaluation Associated with Implementation of Japan Lessons-Learned Near-Term Task Force Recommendation 2.1, ML15069A5162015-03-17017 March 2015 2/24/2014 Summary of Presubmittal Meeting with Energy Northwest to Discuss Relief Request for Radwaste Cleanup Piping for Columbia Generating Station ML14168A0452014-07-0808 July 2014 Summary of 6/10/14 Closed Meeting Between U.S. Army Corps of Engineers, U.S. Dept of Interior Bureau of Reclamation, and Energy Northwest to Discuss Flooding Analysis for Columbia Generating Station ML13339B1452013-12-0505 December 2013 Meeting Summary for Public Meeting with Energy Northwest Regarding Columbia Generating Station ML12306A3332012-11-16016 November 2012 Summary of 10/18/12 Pre-licensing Meeting to Discuss Future License Amendment Request to Address Impacts of Remediation Activities Undertaken by Department of Energy in the Owner-Controlled Area at Columbia Generating Station ML12293A0592012-10-18018 October 2012 Summary of Meeting with Energy Northwest Regarding Columbia Generating Station Performance Improvement Initiatives ML12157A2722012-06-11011 June 2012 5/31/2012 Summary of Telephone Conference with Licensees Regarding Near Term Task Force Recommendation 2.1 Seismic Reevaluations - Diablo Canyon, 1 and 2, San Onofre, Units 2 and 3, Columbia Generating Station, and Palo Verde, Units 1, 2, a ML1201201102012-01-12012 January 2012 Summary of Meeting with Energy Northwest Regarding Columbia Generating Station Performance Improvement Initiatives ML11350A0562011-12-21021 December 2011 12/15/11, Summary of Telephone Conference Call Held Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Metal Fatigue and Operating Experience Open Items in the Columbia License Renewal Safety Evaluation Repo ML11336A1502011-12-12012 December 2011 Summary of Telephone Conference Call Held on November 14, 2011, Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Metal Fatigue Open Item in the Columbia License Renewal Safety Evaluation Report with Open I ML11339A0872011-12-12012 December 2011 Summary of Telephone Conference Call Held on November 28, 2011, Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Upper Shelf Energy Open Item in the Columbia License Renewal Safety Evaluation Report with O ML11339A0852011-12-12012 December 2011 November 8, 2011, Summary of Telephone Conference Call Held Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Metal Fatigue Open Item in the Columbia License Renewal Safety Evaluation Report with Open Items ML11249A0132011-11-21021 November 2011 08/29/2011-Summary of Tele Conf Call Between the USNRC and Energy Northwest, Concerning the Response to the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application ML11311A2662011-11-10010 November 2011 Summary of Tele Conf Call Held on 11/2/11, Between the USNRC and Energy Northwest, Concerning the Core Plate Hold-Down Bolts Open Item in the Columbia License Renewal Safety Evaluation with Open Items ML11305A1762011-11-0303 November 2011 Summary of Tele Conf Call Held on 10/27/11, Between the USNRC and Energy Northwest, Concerning the Metal Fatigue Open Item in the Columbia License Renewal Safety Evaluation with Open Items ML11291A0792011-11-0101 November 2011 09/27/2011 Summary of Public Meetings Conducted to Discuss the Dseis Related to the Review of the Columbia Generating Station License Renewal Application (Tac No. ME3121) ML11273A0012011-10-0404 October 2011 Summary of Teleconf Call Held on Sept. 28, 2011, Between the USNRC and Energy Northwest, Concerning the Draft Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application ML11273A0662011-10-0404 October 2011 Summary of the Telephone Conference Call Held on September 29, 2011, Concerning the Inspection Report Pertaining to the Columbia Generating Station, License Renewal Application ML11256A3002011-09-23023 September 2011 Summary of Telephone Conference Call Held on September 12, 2011, Concerning the Draft Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application ML11238A1582011-09-14014 September 2011 8/25/11 - Summary of Telephone Conference Call Between NRC and Energy Northwest Concerning Drais Pertaining to the SAMA Review of the Columbia Generating Station License Renewal Application ML11250A0152011-09-0808 September 2011 Summary of Tele Conf Call Held on August 22, 2011, Btw the USNRC and Energy Northwest, Concerning Topics Pertaining to the Columbia Generating Station, License Renewal Application ML11223A3512011-08-23023 August 2011 Summary of Telephone Conference Call Held on August 11, 2011, Between the NRC and Energy Northwest, Concerning the Response to the Request for Additional Information Pertaining to the Columbia Generation Station, LRA ML11230B0892011-08-23023 August 2011 August 17, 2011, Summary of Conference Call Held, Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Response to the Request for Additional Information Pertaining to the Columbia Generating Station, LRA ML11216A2532011-08-11011 August 2011 August 3, 2011, Summary of Telephone Conference Call Held Between the NRC and Energy Northwest, Concerning the Response to the Request for Additional Information Pertaining to the Columbia Generating Station, LRA ML11217A0222011-08-11011 August 2011 8/3-4/11, Summary of Telephone Conference Call Held Between Nuclear Regulatory Commission and Energy Northwest, Concerning the Response to the Request for Additional Information Pertaining to the Columbia Generating Station, LRA ML11220A0102011-08-11011 August 2011 February 3, 2011, Summary of Telephone Conference Call Held Between NRC and Energy Northwest, Concerning the Responses to the RAI Pertaining to the Columbia Generating Station, LRA ML1119900742011-08-0404 August 2011 Summary of Pre-Licensing Meeting with Energy Northwest to Discuss Proposed Power Range Neutron Monitoring System/Arts/Mellla License Amendment Request for Columbia Generating Station ML11208B0492011-08-0202 August 2011 07/19/11 Summary of Telephone Conference Call Held Between the NRC and Energy Northwest, Concerning the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application (TAC No. Me3058) 2023-06-05
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UNITED ST ATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 23, 2016 LICENSEE: Energy Northwest FACILITY: Columbia Generating Station
SUBJECT:
SUMMARY
OF JUNE 9, 2016, CLOSED MEETING BETWEEN REPRESENTATIVES OF THE U.S. ARMY CORPS OF ENGINEERS, BUREAU OF RECLAMATION, U.S. NUCLEAR REGULATORY COMMISSION, AND ENERGY NORTHWEST TO DISCUSS THE FLOOD ANALYSIS ASSOCIATED WITH COLUMBIA GENERATING STATION (CAC NO. MF3039)
On June 9, 2016, the U.S. Nuclear Regulatory Commission (NRC) staff held a closed meeting with the U.S. Army Corps of Engineers (USAGE), Bureau of Reclamation, and Energy Northwest (EN, the licensee) to discuss the flood hazard reevaluation (FHR) for the Columbia Generating Station (Columbia). The meeting was held at USACE's offices in Seattle, Washington. The closed meeting notice dated May 16, 2016, can be found in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML16132A512. The list of attendees can be found as Enclosure 1 to this summary. The licensee provided a list of questions associated with the USAGE FHR for the Columbia site. These questions were addressed leading up to the meeting and discussed in part during the meeting. The questions and answers can be found in Enclosure 2 to this summary.
The purpose of the meeting was to discuss the portion of the FHR the USAGE is performing under contract to the NRC for Columbia. By letter dated October 4, 2013, EN requested NRC assistance in having the USAGE perform a dam failure analysis for the Columbia River watershed for Columbia (ADAMS Accession No. ML13284A075). The licensee requested the NRC's assistance to support development of a flood hazard reevaluation report (FHRR) for Columbia in response to the March 12, 2012, request for information issued under Title 10 of the Code of Federal Regulations Part 50, Section 50.54(f) (ADAMS Accession No. ML12073A348).
The USAGE and NRC provided EN with a summary of the results of the USAGE dam failure analysis. The NRC stated that the next action to be completed in the process is the transmittal of the final results to EN. The NRC also stated that EN could request another meeting with the NRC after receiving the results. The licensee committed to submitting the final FHRR within 60 days of receipt of the final results.
The USAGE was provided an opportunity to comment on this summary prior to its issuance and its comments were addressed in the final version of this summary.
If you have any questions, please contact me at (301) 415-1056 or e-mail at Lauren.Gibson@nrc.gov.
Lauren K. Gibson, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket No. 50-397
Enclosures:
- 1. List of Attendees
- 2. Entergy Questions and Answers cc w/encls: Distribution via ListServ
NRC/USACE Intermediate Technical Review (ITR) Meeting US Army Corps Columbia Generating Station of
..,__ _ Engineers,
_ _ _ _ _..... June 9, 2016
- ~.l!*?,*NR~. ~;:g;b;:~~~d~~~trict Headquarters l'rotfftiug />eop/e 1111rl tht' F111*1rom1u*nt 4735 East Marginal Way South Seattle, WA 98134 LIST OF ATTENDEES:
NRC: Andy Campbell, Chris Cook, Anthony Minarik, Brad Harvey, Ken See USAGE Omaha: Chris Fassero, Curtis Miller USAGE Seattle: Harry Ehlers, Travis Ball Bur. of Reclamation: Joe Wright, Frank Dworak Energy Northwest: Don Gregoire, Shannon Kinnunen, Andy Langdon, Dan Moon, Richard Rogalski Enercon (EN): Kurt Roblyer, Suraj Balan Enclosure 1
Energy Northwest Columbia Generating Station -
Questions Regarding USNRC and USACE Dam Failure Analysis Energy Northwest had originally provided questions regarding the Probable Maximum Precipitation Event and Probable Maximum Flood Hydrology.
Probable Maximum Precipitation: The USAGE did not perform an analysis of the probable maximum precipitation event.
Probable Maximum Flood Hydrology To perform this screening analysis, the original Chief Joseph Dam spillway design flood was scaled up and applied to the CGS Basin-Wide PMF based on increase in drainage area. An additional 25% was added to the scaled PMF discharge to account for uncertainty in the drainage area method and the original Chief Joseph Dam flood calculations. The USAGE performed a screening level analysis and confirmed the Basin-Wide PMF scenario cannot flood the CGS site, and therefore is not a critical or impactful scenario.
Probable Maximum Flood Hydraulics
- 1) What hydraulic methods are utilized (e.g., steady state, unsteady state, one-dimensional, two-dimensional, etc.)?
NRC/USACE Response:
HEC-RAS [Hydrologic Engineering Center River Analysis System ] - 5.0, 1-dimensional flow using unsteady state conditions.
- 2) What are the extents of the hydraulic modeling?
NRC/USACE Response:
Kinbasket Lake (reservoir above Mica Dam located in British Columbia, Canada) is the upstream end of the modeling domain. The Pacific Ocean (tidal gage at the Columbia River mouth) is the downstream boundary of the model.
- 3) What topographical inputs were utilized to develop the model?
NRC/USACE Response:
RAS geometry file is a combination of various sources based on the most recently collected terrain and channel surveys available to the USAGE. This data ranges in age from several decades ago (some Canadian cross sections) to a couple of years ago (most of the US portion of the Columbia system due to the Columbia River Treaty studies).
Enclosure 2
- 4) How are any dams and bridges incorporated into the modeling?
NRC/USACE Response:
Dams are simulated as inline structures with a number of different operating approaches -
some are modeled as navigation dams, some elevation-controlled, and others with time series gate openings, depending on the complexity and operations of the dam. Bridges were excluded from the model, with the exception of three highway bridges in the upper Columbia.
- 5) What boundary conditions are used?
NRC/USACE Response:
Tributaries are modeled with storage areas and lateral inflow hydrographs in most cases.
Separate reaches have been developed for some major tributaries and local distributed inflows. Upstream and downstream boundaries are Kinbasket Lake (reservoir upstream of Mica Dam, British Columbia) and Pacific Ocean, tidal gage at the mouth of the Columbia River, respectively.
- 6) How many calibration and verification storms were utilized?
NRC/USACE Response:
This model was originally set-up as a joint-effort dam break model with Canada. Reaches of the model have been calibrated independently with three of each reaches' largest recent storms. No observed events have taken place that would aid in calibration of system-wide dam break-type scenarios.
- 7) How were Manning's roughness coefficients determined and what range of values are used for the stream and floodplain areas?
NRG/USAGE Response:
The hydraulic model used for this study is a conglomerate of smaller reach models that had recently been developed for Columbia River Treaty studies; Mapping, Modeling, and Consequences dam failure studies; and BC Hydro dam failure studies. Each of the smaller models were calibrated using the best available hydrology data. The calibration process included development of Manning's n values using historical channel data, land use coverage, aerial imagery investigation, and available research. The roughness coefficients used in the calibration process remained unchanged during this study. Typical channel roughness is .03 to .05, with isolated reaches as low and high as .022 and .07, respectively.
All overbank roughness is between .07 and .1
Dam Failure
- 8) How were the methods of JLD-ISG-2013-01 considered (e.g., consideration for all dams in the watershed, simplified approaches, hypothetical dams representing clusters of dams, etc.)?
NRG/USAGE Response:
A total of 206 dams were considered, 203 dams were screened out using NRG-provided methodologies (Japan Lessons-Learned Project Directorate, Interim Staff Guidance JLD-ISG-2013-01, "Guidance for Assessment of Flooding Hazards Due to Dam Failure,"
ADAMS Accession No. ML13151A153) and Corps technical team evaluation. Following this process, three dams (Mica, Revelstoke, and Grand Coulee) were identified as potentially-critical and requiring additional analysis.
- 9) Which dam failure scenarios were considered (e.g., hydrologic, seismic, sunny-day)?
NRG/USAGE Response:
All three scenarios (hydrologic, seismic, and sunny day) were considered for each dam.
- 10) If seismic or sunny-day failures were considered, was coincident flooding also considered?
NRG/USAGE Response:
Yes, per NRC/ISG (JLD-ISG-2013-01) guidance.
- 11) Which dams were identified as potentially-critical?
NRC/USACE Response:
Mica, Revelstoke, Grand Coulee.
- 12) Were seasonal reservoir water levels considered in the dam failure analysis?
NRC/USACE Response:
Yes.
- 13) Are any dams overtopped and not considered to fail? What methods were used to conclude overtopped dams would not fail?
NRC/USACE Response:
No, all dams that were overtopped were assumed to fail.
- 14) If the results of the dam failure analysis show that water levels exceed the 441' elevation, please provide the following:
NRC/USACE Response:
The Water level does not exceed 441 ft. (444.5 NAVD88) at the CGS site for any scenario.
- 15) What are the limitations and caveats of using these calculations to estimate downstream and/or off-site impacts related to flooding?
NRC/USACE Response:
The focus of the study was primarily the immediate upstream and downstream area of cross section 352.8 (adjacent to the CGS site), but the model set-up and analysis did include the entire "Hanford" reach from Priest Rapids Dam down to McNary Dam. As the model is set-up currently, it does not include levees, bridges, or full overbank terrain coverage downstream of the CGS site.
ML16167A460 *via email OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NRO/DSEA/RHM1/BC*
NAME AMinarik (LKGibson for) Slent CCook DATE 08/15/2016 06/21/2016 08/18/2016 OFFICE NRR/JLD/JHMB/BC(A) NRR/JLD/JHMB/PM NAME GBowman (EBowman for) LKGibson DATE 08/23/2016 08/23/2016