Letter Sequence Draft RAI |
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Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance, Acceptance
Results
Other: ML100980062, ML101040675, ML101050307, ML101110054, ML101170056, ML101460059, ML103230048, ML103510668, ML110180524, ML111600187, ML11165A023, ML111750188, ML111821975, ML11252B053, ML11291A157, ML11307A393, ML11335A127, ML12044A329, ML12081A275, ML12082A209, ML12181A020
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MONTHYEARML1009205462010-03-31031 March 2010 Comment (1) of John D. Greenhill on Behalf of Himself Regarding Re-Licensing of Columbia Generating Station Project stage: Request ML1009800622010-03-31031 March 2010 Comment (2) of Jerome Delvin Supporting Columbia Generating Station'S License Renewal Project stage: Other ML1010406752010-04-0202 April 2010 Comment (3) of David V. Taylor, Et. Al., on Behalf of Washington State Legislature, Supporting Energy Northwest'S License Renewal for Columbia Generating Station to Extend Operating License Through 2043 Project stage: Other ML1012410372010-04-0606 April 2010 Transcript of Columbia Generating Station License Renewal Process and Environmental Scoping Public Meeting, Evening Session, 04/06/2010, Pages 1-30 Project stage: Meeting ML1010503072010-04-0606 April 2010 Comment (4) of James O. Luce, on Behalf of Washington State Energy Facility Site Evaluation Council, on Columbia Generating Station License Renewal Application Project stage: Other ML1019605472010-04-0606 April 2010 License Renewal, Written Comments of Gene Kinsey from Public Scoping Meeting Project stage: Meeting ML1012410022010-04-0606 April 2010 Transcript of Columbia Generating Station License Renewal Process and Environmental Scoping Public Meeting, Afternoon Session, April 06/2010, Pages 1-39 Project stage: Meeting ML1011100522010-04-0707 April 2010 Comment (5) of Brad Peck, Rick Miller, & Robert E. Koch Supporting Energy Northwest'S Columbia Generating Station License Renewal Application to the Nuclear Regulatory Commission Project stage: Request ML1011604352010-04-0909 April 2010 G20100244/LTR-10-0176/EDATS: SECY-2010-0219 - Ltr., Russell Jim, Storage of Spent Power Reactor Fuel at Columbia Generating Station Project stage: Request ML1011100532010-04-0909 April 2010 Comment (6) of Tim Sheldon Supporting Renewal of the Operating License for the Columbia Generating Station Project stage: Request ML1011700562010-04-12012 April 2010 Comment (8) of Washington State Senate, Supporting License Renewal of Columbia Generating Station Operated by Energy Northwest Project stage: Other ML1011100542010-04-12012 April 2010 Comment (7) of Larry Haler and Brad Klippert on Behalf of the Wa House of Representatives Supporting License Renewal of the Columbia Generating Station Operated by Energy Northwest Project stage: Other ML1011804592010-04-19019 April 2010 Comment (9) of Senator Phil Rockefeller, Washington State Adding His Voice to Those Strongly Supporting Relicensing of Columbia Generating Station as an Essential Asset in Washington'S Energy Resources Project stage: Request ML1032300482010-04-21021 April 2010 Comment (11) of Various Individuals on Behalf of Energy Northwest Re Environmental Review of Columbia Generating Station'S License Renewal Project stage: Other ML1012503142010-05-10010 May 2010 04/06/2010 - Meeting Summary-CGS License Renewal Overview and Environmental Scoping Meetings Project stage: Meeting ML1012505192010-05-10010 May 2010 04/06/2010 - Summary of Public License Renewal Overview and Environmental Scoping Meetings Related to the Review of the Columbia Generating Station License Renewal Application (TAC Nos. ME3058 and ME3121) Project stage: Meeting ML1014600592010-05-14014 May 2010 Comment (10) of Gary Robertson on Behalf of Washington State, Department of Health, on Environmental Review of Columbia Generating Station'S License Renewal Project stage: Other ML1017604212010-07-0101 July 2010 Request for Additional Information for the Review of the Columbia Generating Station License Renewal Application - SAMA Review Project stage: RAI ML1017506552010-07-0202 July 2010 Request for Additional Information for the Review of the Columbia Generating Station License Renewal Application - Environmental Review Project stage: RAI ML1018100912010-07-0808 July 2010 Request for Additional Information Related to the Environmental Site Audit for Columbia Generating Station License Renewal Project stage: RAI ML1018802892010-07-15015 July 2010 June 28, 2010, Summary of Telephone Conference Call Held Between NRC and Energy Northwest Concerning Draft Requests for Additional Information Pertaining to the SAMA Review of the Columbia Generating Station License Renewal Application Project stage: Draft RAI GO2-10-105, Response to Request for Additional Information License Renewal Application2010-08-0505 August 2010 Response to Request for Additional Information License Renewal Application Project stage: Response to RAI GO2-10-108, Response to Request for Additional Information, License Renewal Application2010-08-0909 August 2010 Response to Request for Additional Information, License Renewal Application Project stage: Response to RAI ML1023802882010-08-0909 August 2010 Response to Request for Additional Information License Renewal Application, Enclosure B, Terrestrial Ecology Documents Project stage: Response to RAI ML1021003032010-08-10010 August 2010 Schedule Revision for the Environmental Review of the Columbia Generating Station License Renewal Application Project stage: Approval GO2-10-138, Response to Request for Additional Information on License Renewal Application2010-09-17017 September 2010 Response to Request for Additional Information on License Renewal Application Project stage: Response to RAI ML1026302282010-10-0101 October 2010 04/27/10 Summary of Tribal Outreach Informational Meeting Concerning Columbia Generating Station License Renewal and Hanford Low Level Waste Project stage: Meeting ML1028709842010-11-10010 November 2010 Request for Additional Information for the Review of the Columbia Generating Station License Renewal Application-Sama Review Project stage: RAI ML1035106682010-12-17017 December 2010 E-mail Dtd 12/17/2010, Subj: NRC Ba/Efh Assessment for Columbia Generating Station License Renewal Review Project stage: Other GO2-10-178, Response to Request for Additional Information License Renewal Application2010-12-21021 December 2010 Response to Request for Additional Information License Renewal Application Project stage: Response to RAI ML1027702322010-12-29029 December 2010 Issuance of Environmental Scoping Summary Report Associated with the Staff'S Review of the Application by Energy Northwest for Renewal of the Operating License for Columbia Generating Station Project stage: Approval ML1034305262011-01-10010 January 2011 Schedule Revision for the Review of the Columbia Generating Station License Renewal Application (TAC Nos. ME3058, ME3121) Project stage: Approval ML1034001632011-01-18018 January 2011 06/08/10 - 06/10/10 Summary of Site Visit in Support of the Environmental Review of the License Renewal Application for Columbia Generating Station Project stage: Approval ML1101805242011-01-18018 January 2011 License Renewal, e-mail Dated 1/18/2011 Project stage: Other GO2-11-032, Response to Request for Additional Information for the Review of the License Renewal Application2011-01-28028 January 2011 Response to Request for Additional Information for the Review of the License Renewal Application Project stage: Response to RAI ML1104005102011-03-0101 March 2011 1/19/11 Summary of Telephone Conference Call Held Between USNRC and Energy Northwest Concerning Requests for Additional Information Pertaining to the SAMA Review of the Columbia Generating Station License Renewal Application Project stage: RAI ML1106703792011-03-10010 March 2011 Request for Additional Information for the Review of the Columbia Generating Station License Renewal Application - Severe Accident Mitigation Alternative Review Project stage: RAI GO2-11-082, Environmental Authorizations for CGS Operations2011-04-20020 April 2011 Environmental Authorizations for CGS Operations Project stage: Request GO2-11-092, Response to Request for Additional Information Related to the Review of the Severe Accident Mitigation Alternative Analysis2011-05-0606 May 2011 Response to Request for Additional Information Related to the Review of the Severe Accident Mitigation Alternative Analysis Project stage: Response to RAI ML11157A0362011-06-0505 June 2011 Letter from Heart of America Northwest Public Involvement Lists and Notices, Including Requests to Be Added to Lists and Requests for Hearings on the Draft EIS for Columbia Generating Station Project stage: Request ML1116001872011-06-0909 June 2011 E-mail Dtd 6/9/11, Subj: Energy Nw, Columbia Generating Station Public Involvement and Notice List, Request for Hearings Re EIS Project stage: Other ML11151A2222011-06-14014 June 2011 Schedule Revision for the Environmental Review of the Columbia Generating Station License Renewal Application Project stage: Approval ML1116802212011-06-16016 June 2011 Request for List of Protected Species within the Area Under Evaluation for the Columbia Generating Station License Renewal Application Review Project stage: Request ML1117501882011-06-23023 June 2011 Environmental Authorizations for Current CGS Operations Project stage: Other ML1118219752011-06-27027 June 2011 E-mail Dtd 6/27/2011, Subj: NRC Ba/Efh Assessment for Columbia Generating Station License Renewal Review Project stage: Other ML11165A0232011-08-23023 August 2011 Biological Assessment and Essential Fish Habitat Assessment for License Renewal of Columbia Generating Station Project stage: Other ML11214A2372011-08-30030 August 2011 RAI for the Review of the Columbia Generating Station LRA-Severe Accident Mitigation Alternative Review Project stage: RAI ML11227A0072011-08-31031 August 2011 NUREG-1437 Supp 47 Dfc Generic Environmental Impact Statement for License Renewal of Nuclear Plants Regarding Columbia Generating Station. Project stage: Acceptance Review ML11252B0532011-09-0101 September 2011 Comment (1) of Robert G. Whitlam, on Behalf of Washington Dept of Archaeology & Historic Preservation Columbia Generating Station License Renewal Project stage: Other ML1126306032011-09-20020 September 2011 Meeting Slides Preliminary Site-Specific Results of the License Renewal Environmental Review for Columbia Generating Station Project stage: Meeting 2010-08-05
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Category:Conference/Symposium/Workshop Paper
MONTHYEARML12157A2722012-06-11011 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 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 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) ML11188A2382011-07-12012 July 2011 07/06/2011-Summary of Telephone Conference Call Between NRC and Energy Northwest, Concerning the Request for Additional Information Response Pertaining to the Columbia Generating Station, License Renewal Application ML1104005102011-03-0101 March 2011 1/19/11 Summary of Telephone Conference Call Held Between USNRC and Energy Northwest Concerning Requests for Additional Information Pertaining to the SAMA Review of the Columbia Generating Station License Renewal Application ML1105401262011-02-28028 February 2011 2/17/11 Summary of Telephone Conference Call Held Between the USNRC and Energy Northwest, Concerning the Responses to the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application ML1102603802011-02-16016 February 2011 January 24, 2011, Summary of Telephone Conference Call Held Between U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Request for Additional Information Pertaining to the Columbia Generating Station ML1102402022011-02-0303 February 2011 01/20/2011 Summary of Telephone Conference with NRC and Energy Northwest, Concerning the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application ML1101405882011-01-31031 January 2011 01/12/11 Summary of Telephone Conference Call Held Between NRC and Energy Northwest, Concerning the Responses to RAI Pertaining to the Columbia Generating Station. License Renewal Application ML1030004792010-11-19019 November 2010 Summary of Telephone Conference Call Between the USNRC and Energy Northwest, Concerning the Draft Request for Additional Information Pertaining to the Columbia Generating Station, LRA ML1027902232010-10-25025 October 2010 10/05/2010 Summary of Telephone Conference Call Held Between NRC and Energy Northwest, Concerning the Draft Rao Pertaining to the Columbia Generating Station, License Renewal Application ML1028701932010-10-25025 October 2010 9/22/10 Summary of Telephone Conference Call Held Between the USNRC and Energy Northwest Concerning the D-RAI Pertaining to the Columbia Generating Station, License Renewal Application ML1028702452010-10-25025 October 2010 October 13, 2010, Summary of Teleconference Held Between the U.S. NRC and Energy Northwest, Concerning the Draft Request for Additional Information Pertaining to the Columbia Generating Station License Renewal Application ML1024507562010-09-16016 September 2010 8/12/10, Summary of Telephone Conference Call Held on Between NRC and Energy Northwest, Concerning the RAI Pertaining to the Columbia Generating Station, LRA ML1018802892010-07-15015 July 2010 June 28, 2010, Summary of Telephone Conference Call Held Between NRC and Energy Northwest Concerning Draft Requests for Additional Information Pertaining to the SAMA Review of the Columbia Generating Station License Renewal Application ML13119A5812008-04-0909 April 2008 April 9, 2008, Conference Call Summary Hydrogen Event at CSG 2012-06-11
[Table view] 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
[Table view] Category:Memoranda
MONTHYEARML23156A2822023-06-0505 June 2023 Summary of Meeting with Q & a Session to Discuss the 2022 Annual Assessment of Safety Performance at CGS ML22349A2002022-12-0101 December 2022 NRR E-mail Capture - (External_Sender) Energy Northwest Columbia Generating Station 2022 Priority Pollutant Discharge Monitoring Report ML22147A0932022-06-0606 June 2022 2021 Annual Assessment Public Meeting Summary ML22034A3932022-02-16016 February 2022 Calendar Year 2021 Security Baseline Completion Memo ML21140A3892021-05-24024 May 2021 Riv Column 1 EOC 2020 Public Meeting Summary 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 ML19053A2922019-02-20020 February 2019 Memorandum to File from P. Longmire Decommissioning Funding Plans for Columbia Generating Station ML15191A2892018-10-17017 October 2018 Response to Task Interface Agreement 2014-08 - Columbia Generating Station - Assessment of the Design and Licensing Bases for the Tower Makeup System (CAC No. MF4630; EPID L-2014-LRA-0002) ML18173A0082018-06-20020 June 2018 Cancelling Numerous Inspection Report Numbers ML16117A5552017-11-0303 November 2017 Response to Task Interface Agreement 2014-07, Columbia Generating Station Design and Licensing Basis for Containment Nitrogen Inerting System and Emergency Diesel Generator Fresh Air Intakes ML17037B8502017-02-0606 February 2017 08/21/1975 Notice of Meeting with Architect Engineers of Mark II Owners to Discuss Load Combinations and Analytical Techniques for Determining Stresses in Mechanical Components and Structures of Mark II Containments ML16230A2512016-08-0404 August 2016 Energy Northwest - Response to Volume 13- Emergency Preparedness Procedures ML16132A5122016-05-16016 May 2016 Notice Of Closed Meeting With USACE, NRC And Energy Northwest To Discuss Flood Analysis Associated With Columbia Generating Station ML16088A2052016-03-28028 March 2016 Enclosure 1 - (72.30 DFP Reviews to Be Completed 2015) - Memo T Bowers from s Ruffin, Technial Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations ML16088A2042016-03-28028 March 2016 Memo T Bowers from s Ruffin, Technical Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations W/ Encl 2 (Template) 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, ML14149A1012014-06-0202 June 2014 Notice of Forthcoming Closed Meeting to Discuss Dam Failure Analysis for Columbia Generating Station ML14148A3392014-05-30030 May 2014 G20130776/LTR-13-0866 - Memorandum to File and Transcript of 4/30/2014 Petition Review Board Conference Call with Charles Johnson, Oregon & Washington Physicians for Social Responsibility; 2.206 Petition Seismic Hazards at Columbia ML14050A3502014-02-25025 February 2014 G20130776/LTR-13-0866 - Memorandum to File and Transcript of 2/4/2014 Petition Review Board Conference Call with Charles Johnson, Oregon & Washington Physicians for Social Responsibility; 2.206 Petition Seismic Hazards at Columbia ML14087A1642013-12-12012 December 2013 Cooling Water Intake Screen NMFS Consultation No. (I/NWR/2011/05286) ML14091A2182013-12-12012 December 2013 Cooling Water Intake Screen NMFS Consultation No. (I/NWR/2011/05286) ML13309A0802013-12-11011 December 2013 Memorandum to File: Transcript for 10 CFR 2.206 Petition from Beyond Nuclear (Et Al) Regarding General Electric Mark I and Mark II Boiling-Water Reactors ML13098A0642013-04-10010 April 2013 Memorandum to File, Verbal Authorization on 4/6/2013 of Relief Request ISI3-13, Temporary Non-Code Repair of Reactor Water Cleanup System Piping to Prevent Reactor Shutdown Until Start of Refueling Outage 21 ML13071A4702013-02-28028 February 2013 Response to NRC Order EA-12-051-Overall Integrated Plan for Reliable Spent Fuel Pool Instrumentation ML12278A1212012-10-0404 October 2012 Notice of 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 ML12102A2382012-06-13013 June 2012 Memo Conclusion of Informal Section 7 Consultation with U.S. Fish and Wildlife Service for Columbia Generating Station and Section 7 Consultation Report 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 ML13255A1152012-05-18018 May 2012 E-mail from B. Balsam, NRR to S. Uttal, OGC FW: Section 7 Memo ML13255A1132012-05-18018 May 2012 Memo from J. Susco, NRR to B. Holian, NRR and M. Galloway, NRR on Section 7 Consultants That Extend Beyond the Nrc'S Issuance of Renewed Operating License and ESA Section 7(D) Findings ML13255A1122012-05-17017 May 2012 Email from B. Balsam, NRR to L. Subin, OGC Et Al., on Section 7 Memo ML12101A3952012-05-0404 May 2012 Conclusion of Efh Consultation for Columbia Generating Station and Efh Consultation Report ML12058A4962012-02-27027 February 2012 License Renewal Application 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 ML11348A0142011-12-16016 December 2011 Summary of Telephone Conference Call Held on 12/06/11, Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Metal Fatigue and Operating Experience Open Items in the Columbia License Renewal SER with Open Items 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 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) 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 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 ML11238A1202011-09-0707 September 2011 Notice of Forthcoming Meeting to Discuss the D-SEIS for the Lr of Columbia Generating Station ML11242A0942011-08-30030 August 2011 Advisory Committee on Reactor Safeguards Review of the Columbia Generating Station, License Renewal Application - Safety Evaluation Report with Open Items ML1117305512011-06-21021 June 2011 Notice of Forthcoming Pre-Licensing Meeting with Energy Northwest to Discuss Proposed Power Range Neutron Monitoring System/Arts/Mellla License Amendment Request for Columbia Generating Station ML1108714952011-04-0505 April 2011 Summary of Telephone Conference Call Held on March 23, 2011, Between NRC and Energy Northwest, Concerning the RAI Pertaining to the Columbia Generating Station, LRA (Tac No. ME3058) ML1106704962011-03-28028 March 2011 Summary of Telephone Conference Call Held on 2/28/11 Btw the USNRC and Energy Northwest Concerning Draft Requests for Additional Information Pertaining to the SAMA Review of the Columbia Generating Station License Renewal Application ML1102007102011-02-0303 February 2011 01/11/11 Summary of Telephone Conference Call Held Between the U.S. Nuclear Regulatory Commission and Energy Northwest Concerning the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Applicat ML1101405882011-01-31031 January 2011 01/12/11 Summary of Telephone Conference Call Held Between NRC and Energy Northwest, Concerning the Responses to RAI Pertaining to the Columbia Generating Station. License Renewal Application ML1100604382011-01-13013 January 2011 Summary of Telephone Conference Call Held on 1/5/11, Between NRC and Energy Northwesy, Concerning the RAI Pertaining to the Columbia Generating Station License Renewal Application (Tac No. ME3058) ML1100500182011-01-0606 January 2011 Summary of Telephone Conference Call Held on January 3, 2011, Between the NRC and Energy Northwest, Concerning the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application (TAC Number ME3 ML1034003172010-12-14014 December 2010 Notice of Forthcoming Pre-application Meeting on 1/18/2011 with Energy Northwest to Discuss Proposed Power Range Neutron Monitoring System/Arts/Mellla License Amendment Request ML1100300742010-12-14014 December 2010 Correction to Forthcoming Pre-Licensing Meeting with Energy Northwest(Tac No. ME5129), to Discuss Proposed Installation of a Digital Power Range Neutron Monitoring System, Average Power Range Monitor/Rod Block Monitor/Technical Specificatio 2023-06-05
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 15, 2010 LICENSEE: Energy Northwest FACILITY: Columbia Generating Station
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON JUNE 28,2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW OF THE COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest (the applicant) held a telephone conference call on June 28,2010, to discuss and clarify the staffs draft requests for additional information (D-RAls) concerning the Severe Accident Mitigation Alternatives (SAMA) review of the Columbia Generating Station license renewal application. The telephone conference call was useful in clarifying the intent of the staffs D-RAls. provides a listing of the participants and Enclosure 2 contains a listing of the D-RAls discussed with the applicant, including a brief description of the status of the items.
The applicant had an opportunity to comment on this summary.
~
Daniel I. Doyle, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-397
Enclosures:
- 1. List of Participants
- 2. List of Draft Requests for Additional Information cc w/encls: Distribution via Listserv
LIST OF PARTICIPANTS COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION-SAMA REVIEW TELEPHONE CONFERENCE CALL JUNE 28, 2010 PARTICIPANTS AFFILIATIONS Daniel Doyle U.S. Nuclear Regulatory Commission (NRC)
Tina Ghosh NRC Ray Gallucci NRC Steve Short Pacific Northwest National Laboratory (PNNL)
Garill Coles PNNL Bruce Schmitt PNNL Abbas A. Mostala Energy Northwest (EN)
Marsha G. Eades EN Jerral E. (Dusty) Rhoads EN Albert T. Chiang EN Massoud Tafazzoli AREVA Stanley Levinson AREVA Jennifer Butler AREVA James Metcalf AREVA Darvin Kapitz AREVA Eric J. Jorgenson Maracor ENCLOSURE 1
DRAFT REQUESTS FOR ADDITIONAL INFORMATION COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION SAMA REVIEW JUNE 28, 2010 The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of the applicant, Energy Northwest (EN), held a telephone conference call on June 28, 2010, to discuss and clarify the following draft requests for additional information (D-RAls) concerning the Severe Accident Mitigation Alternatives (SAMA) review of the Columbia Generating Station (CGS) license renewal application.
D-RAI1a Provide the following information regarding the Level 1 Probabilistic Safety Assessment (PSA) used for the SAMA analysis: Environmental Report (ER) Section E.3 explains that the SAMA evaluation is based on PSA Revision 6.2 models for Level 1 and 2 internal, fire, and seismic events. Table E.3-1 shows the completion dates for these different models to range from 1/2004 to 2/2007 and shows these models to be based on incorporation of plant modifications that occurred up through 8/2006 and CGS data/Bayesian updating through 6/2002. Identify any changes to the plant (physical and procedural modifications) since those dates that could have a significant impact on the results of the SAMA analyses, and provide a qualitative assessment of their impact on the PSA and on the results of the SAMA evaluation. Identify whether a newer PSA model is available, and if so, provide a brief description of the major changes relative to the PSA Revision 6.2, and provide an assessment of the impact on the results of the SAMA evaluation (e.g., increased benefit or additional SAMAs if the baseline core damage frequency (CDF) has increased; any new candidate SAMAs for newly-identified dominant sequences or risk-significant basic events).
Discussion:
The applicant noted that the PRA of record was Revision 6.2 and acknowledged that an upgraded PRA to RG 1,200 Rev 2 was recently available. The applicant was concerned with how that information could be used for the docketed SAMA analysis which was performed with Revision 6.2. NRC expressed concern that the insights from Revision 7.1 may lead to additional potentially cost beneficial SAMAs. The NRC indicated that the information from Revision 7,1 would be needed for validating the docketed SAMA analysis and some of the qualitative statements on the effect of plant changes that occurred after Revision 6.2.
D-RAI1b Provide the following information regarding the Level 1 PSA used for the SAMA analysis: ER Table E.3-3 shows the contribution of speCific types of Transients and loss of coolant accidents (LOCAs) to the CDF and identifies specific initiators leading to anticipated transient without scram. In light of the fact that station blackout (SBO) contributes 33.1 % to the CDF, identify the initiators that contribute to SBO.
ENCLOSURE 2
-2 Discussion:
The applicant asked for a clarification of the request to identify "initiators" that contribute to the SBO. The NRC reviewers responded that they were looking for the loss of offsite power (LOOP) contributors that comprise the grid, weather, and internal contributors to LOOP. The applicant stated that this was sufficient clarification.
D~RAI 1ci-iii Provide the following information regarding the Level 1 PSA used for the SAMA analysis:
i) A summary of the scope of the 1997 owner's group peer review mentioned in Section E.5.5.
ii) A brief description of all unresolved B Level facts and observations (F&Os) from the 2004 internal events PSA peer review discussed in Section E.5.5 and an assessment of their impact on the SAMA evaluation.
iii) A summary of the scope of the other two peer reviews and the seven technical reviews discussed in Section E.5.2, a brief description of all unresolved issues/F&Os, and an assessment of their impact on the SAMA evaluation.
Discussion:
The applicant noted that (c)(ii) asks for only a discussion on unresolved LEVEL B F&Os, whereas (c)(iii) asks for a brief description of all unresolved issues/F&Os and that (c)(i) asks for only a summary of the scope of the Boiling-Water Reactor Owners Group (BWROG) 1997 peer review. The applicant asked if the NRC is asking for only the significant unresolved F&Os from the various peer reviews and technical assessments or for all of the F&Os and if, for the 1997 peer review, only a scope of the review was required. The NRC reviewer indicated that he is most interested in significant F&Os that were unresolved from these peer reviews and technical assessments that might impact the SAMA evaluations or potentially create new ones. The reviewer also noted that the expectation is that any unresolved F&Os from the 1997 peer review will have been addressed in the most recent peer review and, if not, need to be specifically discussed.
D-RAI1e Provide the following information regarding the Level 1 PSA used for the SAMA analysis: ER Table E.3-2 presents the truncation limits used when quantifying the Internal Events and Fire PSA fault trees to be 1E-8 to 1E-14 with a footnote explaining that "the truncation limit was adjusted to assure sufficient capture of the contributing basic events." The meaning of and need for different truncation limits for fault trees, event trees and a category referred to as "Global" is not clear. Explain the basis for the truncation limits selected and the meaning of the entries shown in Table E.3-2. Clarify for which cases a truncation limit of 1E-8 versus a truncation limit of 1E-14 was used.
- 3 Discussion:
The applicant asked for additional detail regarding the request regarding truncation limits. The reviewers stated that they were not familiar with the use of specific and global truncation limits.
The applicant responded that this was a feature in the WinNUPRA program that allowed selective application of truncation limits to fault trees, event trees and to the overall equation.
Additional information was provided by Eric Jorgenson of Maracor on the use of these in the quantification module and how sensitivity evaluations were performed to assure these selective truncation limits did not result in loss of potential contributors from the fault trees and events trees. The NRC reviewer emphasized that additional information was needed to understand how the range of different truncation limits was applied and the basis for selecting the limit. The applicant agreed to provide more information on the WinNUPRA models quantification and the Revision 6.2 sensitivity studies that validate that they do not truncate important contributors to the solution.
D-RAI2b Provide the following information relative to the Level 2 analysis: ER Section EA.1.1 states that containment event trees (CETs) were developed for each plant damage state (PDS) and that quantification of the CETs was supported by fault tree analysis and assignment of split fractions.
Clarify how probabilities were assigned to branches using split fractions for branches. In the response, specifically address how split fractions were developed for phenomenological branch points.
Discussion:
The applicant asked for clarification about the request for information regarding the development of the split fractions and especially how split fraction were developed for phenomenological branch points. The NRC reviewers responded that although the values were provided in the submittal for the split fractions, they were looking for additional information on how these were determined.
D-RAI2c Provide the following information relative to the Level 2 analysis: ER Section E.5.5.1 lists peer review findings and other self-identified areas that are in progress for the next revision,and characterizes them as not expected to significantly alter the SAMA analysis findings. Yet, a number of the recommendations address non-conservatism in the Level 1 and 2 PSA model, including:
- upgrading the LOCA outside containment modeling;
- incorporating an initiating event for CCF of both 125-VDC power divisions;
- refining the impact of spray on equipment, the RCIC pump flood damage height, and flood isolation HEPs;
- including certain early phenomena that can lead to LERF;
- revising crew actions included in the LERF assessment;
- 4
- accounting for potential environmental impacts in the survivability of systems for Level 2 mitigation;
- reconsidering inclusion of source term scrubbing for non-LERF end states having no MAAP calculation.
Justify the conclusion that the unresolved findings are not expected to significantly alter the results of the SAMA analysis.
Discussion:
The applicant asked what additional justification would be acceptable to the NRC for those peer review findings and other self-identified areas that are in progress for the next revision. The applicant indicated that: (1) additional qualitative discussion of each item listed could be provided, (2) Revision 6.2 could be modified to bound the item, or (3) potentially this might be a use for Revision 7.1 as a sensitivity study against Revision 6.2 as these issues have been incorporated into Revision 7.1. The NRC replied that of the three options, the preferred one would be the third option.
D-RAI2f Provide the following information relative to the Level 2 analysis: The ER does not provide an importance list of either Level 1 or Level 2 basic events and so it is not possible to ascertain the significance of recovery events or operator actions in the PSAs. Discuss the extent to which recovery of systems or operator actions following the onset of core damage is credited in the Level 2 assessment and how recovery is modeled.
Discussion:
The applicant explained that Revision 6.2 could generate an importance list of basic events for level 1 (CDF) but, due to the structure of the interface between Level 1 and Level 2 (LERF), the importance at the basic events did not propagate through the Containment Event trees, and, therefore, the traditional Fussell-Vesely importance listing for level 2 basic events could not be provided. The applicant informed the NRC that they attempted to provide this information on Level 2 importance in narrative form in the submittal in section E9.5. The applicant stated that this was determined through inspection of those plant damage states that contribute most to LERF and identifying the major accident progression sequences and their important basic events. But Revision 6.2 would not generate the classic importance listing that the NRC was asking for in this question (and later in question 5c). The NRC reviewers emphasized that additional detail at the Level 2 basic event or cutset level was needed to conclude that the importance contributors had been considered. The NRC asked if Revision 7.1 would generate the importance. The applicant responded that it can and a sensitivity evaluation could be done to confirm the information in the level 2 importance discussion in the E9.5 section of the submittal. If additional basic events are identified in the sensitivity analysis, their consideration for additional SAMA candidates could be assessed.
- 5 D-RAI3a Provide the following information with regard to the treatment and inclusion of external events in the SAMA analysis: ER Section E.3.2.2 states that the seismic hazard analysis used for the seismic PSA is the same as submitted for the CGS Individual Plant Examination of External Events (IPEEE) except for an extrapolation from the maximum peak ground acceleration to 1.5g. The seismic hazard analysis used for the IPEEE was developed in 1994 and documented in "Probabilistic Seismic Hazard Analysis WNP-2 Nuclear Power Plant Hanford Washington."
Justify the use of the seismic PSA model given: (1) since then the U.S. Geological Survey (USGS) has updated its assessment of seismic hazards across the U.S., including Washington State, (2) seismic hazard analysis was performed specifically for the Hanford area in 1994 which is documented in WHC-SD-W236A-TI-016, Seismic Design Spectra 200 West and East Areas DOE Hanford Site, Washington," to provide better evaluation of subsurface materials and (3) work was performed in 2005 which is documented in PNNL-15089, "Site-Specific Seismic Response Model for the Waste Treatment Plant, Hanford Washington" that better characterizes the effect from deep layers of sediments "interbedded" with basalt. Address whether consideration of the more current seismic hazard analysis could impact the results of the SAMA analysis (both SAMA identification and SAMA evaluation).
Discussion:
The applicant expressed concern that impact to the seismic hazard curve by newer geological studies conducted by others for the region and a facility about 11 miles away from CGS could not be addressed quantitatively. The applicant asked if the intent of the question was to have the applicant review those other studies and to provide a qualitative response. The NRC was concerned that the seismic hazard study was based on techniques and methodology from about 15 years ago and was concerned that recent studies might cause additional SAMA considerations for the seismic hazard that the PRA would not identify. The applicant responded that the Waste Treatment Plant study had been quickly reviewed and it was noted that, in the report, the primary geological features that caused higher response spectra in the 2-10 hertz region were layers of basalt and silt structures. In review of CGS core drills, these kinds of structures were not identified to be prominent. The applicant asked if a discussion on that level would be of value to the reviewers for this question. NRC reviewers responded that it could be useful.
D-RAI6a Provide the following with regard to the Phase II cost-benefit evaluations: Section E.8 provides the basis and results for the total averted cost, or maximum benefit, from internal events.
Provide the same information (Le., APE, AOC, AOE, AOSC) for the total averted cost from fire and seismic events.
Discussion:
The applicant noted that the APE, AOC, AOE, and AOSC for fire and seismic were located in Tables E.11-3 and E.11-4. The reviewer agreed and withdrew the question. Items 6b-k will be renumbered 6a-j.
- 6 D-RAI6j Provide the following with regard to the Phase II cost-benefit evaluations: ER Section E.12 discusses six sensitivity cases. Insufficient information is provided to understand the specific changes made to the baseline analysis assumptions for Cases 1 and 6. Provide a more detailed description of the analysis assumptions and methodology for these two cases.
Discussion:
The applicant asked for clarification on what additional information the NRC was looking for related to Sensitivity Cases 1 and 6. For Sensitivity Case 1 the NRC is looking for how repaired and refurbished equipment was credited in the cost-benefit analysis. For Sensitivity Case 6 the NRC is looking for what escalation rate was used to determine the increase in replacement power costs.
D-RAI6k Provide the following with regard to the Phase II cost-benefit evaluations: ER Section E.12 states that "no explicit uncertainty was performed since the number of conservative assumptions and input account for any uncertainties in the calculations," and goes on to delineate several sources of conservatism in the SAMA analysis. This is not consistent with NEI 05-01 wherein the delineation of conservatisms is used to offset an uncertainty factor based on the 95th percentile CDF. Given that the 95th percentile values are typically a factor of two to five higher than point estimates, identify and provide a further evaluation of those SAMAs that are within a factor of two to five of being cost-beneficial. This evaluation can be based on more realistic estimates of risk reduction and implementation costs, and deterministic considerations, including potential negative implications of candidate SAMAs.
Discussion:
The applicant asked if a qualitative discussion would be an acceptable response. The NRC clarified the question and stated that a quantitative analysis is needed. The quantitative analysis should determine the impact that the variability in the CDF has on the maximum benefit.
July 15, 2010 LICENSEE: Energy Northwest FACILITY: Columbia Generating Station
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON JUNE 28, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW OF THE COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest (the applicant) held a telephone conference call on June 28, 2010, to discuss and clarify the staffs draft requests for additional information (D-RAls) concerning the Severe Accident Mitigation Alternatives (SAMA) review of the Columbia Generating Station license renewal application. The telephone conference call was useful in clarifying the intent of the staffs D-RAls. provides a listing of the participants and Enclosure 2 contains a listing of the D-RAls discussed with the applicant, including a brief description of the status of the items.
The applicant had an opportunity to comment on this summary.
IRA!
Daniel I. Doyle, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-397
Enclosures:
- 1. List of Participants
- 2. List of Draft Requests for Additional Information cc w/encls: Distribution via Listserv DISTRIBUTION:
See next page ADAMS Accession No ML101880289 OFFICE LA:DLR PM:RPB1:DLR BC:RPB1 :DLR PM:RPB1 :DLR NAME IKing DDoyle BPham DDoyle DATE 07/15/10 07/15/10 07/15/10 07/15/10 OFFICIAL RECORD COpy
Memorandum to Energy Northwest from Daniel I. Doyle dated July 15, 2010
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON JUNE 28, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW OF THE COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION DISTRIBUTION:
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