Letter Sequence RAI |
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MONTHYEARML1012503142010-05-10010 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 ML1024403422010-08-19019 August 2010 Columbia Generating Station - Response to Request for Additional Information License Renewal Application Project stage: Response to RAI ML1022203732010-08-26026 August 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application for Fatigue Monitoring Program, TLAA Exemptions, Metal Fatigue TLAA, Cumulative Fatigue Damage, CASS, and Structural Project stage: RAI ML1024505712010-09-14014 September 2010 Summary of Telephone Conference Call Held on August 10, 2010, Between the U.S. NRC and Energy Northwest, Concerning the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application Project stage: RAI ML1024506212010-09-14014 September 2010 Summary of Telephone Conference Call Held on August 26, 2010, Between the U.S. NRC and Energy Northwest, Concerning the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application Project stage: RAI ML1024507272010-09-16016 September 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application Project stage: RAI 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 Project stage: RAI ML1025306452010-09-21021 September 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application Project stage: RAI ML1027004332010-10-0404 October 2010 Summary of Telephone Conference Call Held on September 13, 2010, Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Request for Additional Information Pertaining to the Columbia Generating Station, License R Project stage: RAI ML1028004262010-10-14014 October 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application (TAC No. 3058) Project stage: RAI ML1028507352010-10-20020 October 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application (TAC ME3058) Concerning Structures Project stage: RAI ML1027303552010-10-20020 October 2010 Letter Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application, Concerning Structures (Tac No. ME3058) Project stage: RAI 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 Project stage: Draft Other 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 Project stage: Draft RAI 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 Project stage: RAI ML1028501032010-10-27027 October 2010 Summary of Telephone Conference Calls Held on 9/20/10, Between Us NRC and Energy Northwest, Concerning the Response to RAI Pertaining to the Columbia Generating Station, LRA Project stage: RAI ML1029305932010-11-0101 November 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application Project stage: RAI ML1030100802010-11-0505 November 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application Project stage: RAI GO2-10-164, Response to Request for Additional Information License Renewal Application2010-11-11011 November 2010 Response to Request for Additional Information License Renewal Application Project stage: Response to RAI 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 Project stage: Draft RAI ML1030905662010-11-19019 November 2010 Summary of Teleconference Held on September 22, 2010, Between the U.S. NRC and Energy Northwest, Concerning the Responses to the Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application Project stage: RAI ML1031305482010-11-19019 November 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application Project stage: RAI ML1032003382010-11-19019 November 2010 Summary of Teleconference Held on November 8, 2010, Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Responses to Request for Additional Information Pertaining to the Columbia Generating Station, LRA Project stage: RAI ML1035400222010-12-20020 December 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application Project stage: RAI ML1035506032010-12-27027 December 2010 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application (TAC No. Me3058) Project stage: RAI 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 Project stage: RAI 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 ML1036307392011-01-11011 January 2011 Safety Project Manager Change for the License Renewal of Columbia Generating Station (Tac No. ME3058) Project stage: Other 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) Project stage: RAI 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 Project stage: RAI 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 Project stage: RAI ML1102404262011-02-0303 February 2011 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application for Metal Fatigue (Tac No. ME3058) Project stage: RAI 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 Project stage: RAI 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 Project stage: RAI ML1104702152011-02-23023 February 2011 Summary of Telephone Conference Call Held on February 14, 2011, Btw the USNRC and Energy Northwest, Concerning the Responses to the Request for Additional Information Pertaining to the Columbia Generating Station, LRA Project stage: RAI 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 Project stage: RAI ML1106107122011-03-0909 March 2011 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application for Buried Piping and Tanks Inspection Project stage: RAI ML1106909972011-03-15015 March 2011 Summary of Telephone Conference Call Held on 3/8/11 Btw the USNRC and Energy Northwest Concerning the Responses to the RAI Pertaining to the Columbia Generating Station, License Renewal Application (TAC Number ME3058) Project stage: RAI ML1106806702011-03-18018 March 2011 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application for Drywell Floor Peripheral Seal Assembly (TAC Number ME3058) Project stage: RAI ML1106303602011-03-23023 March 2011 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application for Time-Limited Aging Analyses of Reactor Vessel Neutron Embrittlement (TAC Number ME3058) Project stage: RAI 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) Project stage: RAI ML11138A3232011-05-24024 May 2011 RAI for the Review of the Columbia Generating Station, License Renewal Application for Operating Experience Project stage: RAI ML11140A1612011-06-0202 June 2011 RAI for the Review of the Columbia Generating Station, License Renewal Application Regarding Core Plate Assembly Project stage: RAI ML11137A0442011-06-0808 June 2011 05/06/2011-Summary of Telephone Conference Call Between the NRC and Energy Northwest, Concerning the Draft Request for Additional Information Pertaining to the Columbia Generating Station, License Renewal Application Project stage: Draft RAI ML11165A2432011-06-22022 June 2011 Summary of Telephone Conference Call Held on June 1, 2011, Between the U.S. Nuclear Regulatory Commission and Energy Northwest, Concerning the Request for Additional Information Pertaining to the Columbia Generating Station, LRA Project stage: RAI 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 Project stage: RAI ML11195A2402011-07-19019 July 2011 Request for Additional Information for the Review of the Columbia Generating Station, License Renewal Application Regarding High Voltage Porcelain Insulators Project stage: RAI 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) Project stage: RAI 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 Project stage: RAI 2011-01-13
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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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Text
October 4, 2010 LICENSEE: Energy Northwest FACILITY: Columbia Generating Station
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON SEPTEMBER 13, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST, CONCERNING THE REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE COLUMBIA GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC NO. ME3058)
The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest (EN), held a telephone conference call on September 13, 2010, to discuss and clarify the NRCs request for additional information (RAI) concerning the Columbia Generating Station, license renewal application (LRA). The telephone conference call was useful in clarifying the intent of the staffs RAIs. provides a listing of the participants and Enclosure 2 contains a listing of the D-RAIs discussed with the applicant, including a brief description on the status of the items.
The applicant had an opportunity to comment on this summary.
/RA/
Evelyn Gettys, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-397
Enclosure:
As stated cc w/encls: Distribution via Listserv
ML102700433 OFFICE PM:RPB1:DLR LA:DLR BC: RPB1:DLR NAME EGettys YEdmonds BPham DATE 10/ /10 10/1/10 10/4/10
TELEPHONE CONFERENCE CALL COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS September 13, 2010 PARTICIPANTS AFFILIATIONS Evelyn Gettys U.S. Nuclear Regulatory Commission (NRC)
Bill Holston NRC Robert Sun NRC Yiming Pan Center (NRC contactor)
Abbas Mostala Energy Northwest (EN)
Marsha Eades EN John Twomey EN Janet Worthington EN Ryan Oakes EN ENCLOSURE 1
TELEPHONE CONFERENCE CALL COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION September 13, 2010 The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest, held a telephone conference call on September 13, 2010, to discuss and clarify the following requests for additional information (RAIs) concerning the Columbia Generating Station, license renewal application (LRA).
Above ground Steel Tanks AMP Follow-up RAI Draft RAI B.2.1-3
Background:
RAI B.2.1-1 requested the applicant to justify why there are no apparent compensatory inspections to detect potential corrosion of the tank bottom surface of the condensate storage tanks due to water and moisture intrusion penetrating the tank and concrete interface given that there is no sealant or caulking at this interface edge as recommended by GALL AMP XI.M29.
In its response dated August 26, 2010, the applicant stated that the condensate storage tanks have a preventive maintenance task to perform a visual and ultrasonic thickness measurement of the tank bottoms every ten years.
Issue:
The staff lacks sufficient information to evaluate that, given the lack of sealant or caulking at the interface between the tank and concrete foundation, whether the ten year frequency of the preventive maintenance task is adequate to detect degradation before it impacts the ability of the tank to meet its current licensing basis function(s).
Request:
Provide additional justification supporting a ten year frequency for performing the tank bottom inspection preventive maintenance activity (e.g., plant-specific operating experience from previous inspections).
Discussion: The staff discussed this draft RAI with the applicant. The applicant will provide a response as requested.
Compressed Air Monitoring RAI B.2.2-3
Background
GALL Report Table 3, line item 53 indicates that steel piping, piping components, and piping elements exposed to condensation can undergo loss of material due to corrosion, and GALL AMP XI.M24, Compressed Air Monitoring is recommended for managing the aging effect.
ENCLOSURE 2
Furthermore, the GALL AMP XI.M24 recommends the use of visual inspections, air quality monitoring, etc., to verify proper operation of the compressed air system and to ensure timely detection of loss of material due to corrosion.
LRA Table 3.3.2-10, Row Numbers 5, 7, 9, and 11 indicate that steel piping and valve bodies internally exposed to dried air are not subject to aging effects that require management. The LRA references the GALL Report item VII.J-22 for consistency and attributes the AMR results to AMP B.2.2, Air Quality Sampling Program. In addition, the LRA states that AMP B.2.2 is an existing, plant-specific program and includes periodic sampling for air quality in the Control Air System. The LRA also states that the other portions of GALL AMP XI.M24 are not applicable.
Issue As discussed in the references included in GALL AMP XI.M24, aging effects such as loss of material due to corrosion have been a contributor to compressed air system failures. While AMP B.2.2 performs periodic air quality sampling, the LRA does not provide sufficient detail for the staff to understand how a dried air (internal) environment will be maintained and/or verified for compressed air system related piping, piping components, and piping elements in the event that the air driers were isolated or bypassed due to a system perturbation, to support maintenance activities, or during an outage.
Request For compressed air system related piping, piping components, and piping elements identified as being exposed to a dried air (internal) environment, describe how a dried air environment will be maintained and/or verified in the event that the air driers were isolated or bypassed due to a system perturbation, to support maintenance activities, or during an outage.
Discussion: The staff discussed the draft RAI with the applicant. The applicant described their system which the staff will review when the responses are received.
Generic RAI on Submerged Inaccessible Low-Voltage Cables Revised B.2.32 this replaces B.2.32-4 from letter ML102300229 dated August 26, 2010
Background:
NUREG-1801, Rev. 1, Generic Aging Lessons Learned, (the GALL Report) addresses inaccessible medium-voltage cables in Aging Management Program (AMP) XI.E3, Inaccessible Medium Voltage Cables Not Subject to 10 CFR 50.49 Environmental Qualification Requirements. The purpose of this program is to provide reasonable assurance that the intended functions of inaccessible medium-voltage cables (2 kV to 35 kV), that are not subject to environmental qualification requirements of 10 CFR 50.49 and are exposed to adverse localized environments caused by moisture while energized, will be maintained consistent with the current licensing basis. The scope of the program applies to inaccessible (in conduits, cable
trenches, cable troughs, duct banks, underground vaults or direct buried installations) medium-voltage cables within the scope of license renewal that are subject to significant moisture simultaneously with significant voltage.
The application of AMP XI.E3 to medium-voltage cables was based on the operating experience available at the time Revision 1 of the GALL Report was developed. However, recently identified industry operating experience indicates that the presence of water or moisture can be a contributing factor in inaccessible power cables failures at lower service voltages (480 V to 2 kV). Applicable operating experience (OE) was identified in licensee responses to Generic Letter (GL) 2007-01, Inaccessible or Underground Power Cable Failures that Disable Accident Mitigation Systems or Cause Plant Transients, which included failures of power cable operating at service voltages of less than 2 kV where water was considered a contributing factor.
Recently identified industry operating, provided by the NRC licensees in response to GL 2007-01, has shown that there is an increasing trend of cable failures with length in service beginning in the 6th through 10th years of operation and also that moisture intrusion is the predominant factor contributing to cable failure. The staff has determined, based on the review of the cable failure distribution, that annual inspection of manholes and cable testing frequency of at least every 6 years is a conservative approach to ensuring the operability of power cables and, therefore, should be considered.
In addition, recently identified industry operating experience has shown that some NRC licensees may experience events, such as flooding or heavy rain, that subject cables within the scope of program for GALL Report XI.E3 to significant moisture. The staff has determined that event driven inspections, in addition to a 1 year periodic inspection frequency, is a conservative approach and, therefore, should be considered.
Issue:
The staff has concluded, based on recently identified industry operating experience concerning the failure of inaccessible low-voltage power cables (480 V to 2 kV) in the presence of significant moisture, that these cables can potentially experience age related degradation. The staff noted that the applicants Inaccessible Medium-Voltage Cables Program does not address inaccessible low voltage power cables (400 V (Nominally 480 V) to 2 kV inclusive). In addition, increased cable test and inspection frequencies (6 and 1 years respectively) should be evaluated to ensure that the Inaccessible Medium-Voltage Cables Program test and inspection frequencies reflect industry and plant-specific operating experience and that test and inspection frequencies may be increased based on future industry and plant-specific operating experience.
Request:
- 1. Provide a summary of your evaluation of recently identified industry operating experience and any plant-specific operating experience concerning inaccessible low- voltage power cable failures within the scope of license renewal (not subject to 10 CFR 50.49 environmental qualification requirements), and how this operating experience applies to the need for additional aging management activities at your plant for such cables.
- 2. Provide a discussion of how Columbia will manage the effects of aging on inaccessible low-voltage power cables within the scope of license renewal and subject to aging management review; with consideration of recently identified industry operating experience and any plant-specific operating experience. The discussion should include assessment of your aging management program description, program elements (i.e., Scope of Program, Parameters Monitored/Inspected, Detection of Aging Effects, and Corrective Actions),
and FSAR summary description to demonstrate reasonable assurance that the intended functions of inaccessible low-voltage power cables subject to adverse localized environments will be maintained consistent with the current licensing basis through the period of extended operation.
- 3. Provide an evaluation showing that the Inaccessible Medium-Voltage Cables Program test and inspection frequencies, including event driven inspections, incorporate recent industry and plant-specific operating experience for both inaccessible low- and medium-voltage cable.
Discuss how the Inaccessible Medium Voltage Program will ensure that future industry and plant-specific operating experience will be incorporated into the program such that inspection and test frequencies may be increased based on test and inspection results.
Discussion: The staff discussed with the applicant operating experience at the CGS and the inspection frequency of maintenance programs for inaccessible cable. The applicant will provide a response.
Letter to Energy Northwest from Evelyn H. Gettys dated October 04, 2010.
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON SEPTEMBER 13, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST, CONCERNING THE REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE COLUMBIA GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC NO. ME3058)
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EGettys DDoyle FLyon WWalker, RIV RCohen, RIV LSubin, OGC