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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20211B7881999-08-10010 August 1999 Transmits Summary of Two Meetings with Risk-Informed TS Task Force in Rockville,Md on 990514 & 0714 ML20209H6921999-07-15015 July 1999 Forwards Comments on Preliminary Accident Sequence Precursor Analysis Provided in NRC Re Operational Condition Reported in LER 269/1998-04 ML20195H1681999-06-10010 June 1999 Forwards Copy of Preliminary ASP Analysis of Operational Condition Discovered at Ons,Units 1,2 & 3 on 980212 & Reported in LER 269/98-004,for Review & Comment ML20207C0321999-05-18018 May 1999 Forwards Fifth Rept Which Covers Month of Apr 1999. Commission Approved Transfer of TMI-1 Operating License from Gpu to Amergen & Transfer of Operating License for Pilgrim Station from Beco to Entergy Nuclear Generating Co ML20206E4101999-04-26026 April 1999 Forwards Four Copies of Rev 9 Todpc Nuclear Security & Contingency Plan,Per 10CFR50.54(p)(2).Changes Do Not Decrease Safeguards Effectiveness of Plan.Encl Withheld,Per 10CFR73.21 ML20205T1301999-04-0909 April 1999 Informs That on 990317,C Efin & Ho Christensen Confirmed Initial Operator Licensing Exam Schedule for Y2K.Initial Exam Dates Scheduled for Wks of 000710 & 17 for Approx 13 Candidates ML20205B0571999-03-24024 March 1999 Informs That Author Determined That Partial Exemption from 10CFR170 Fee Requirements Appropriate for Footnote 4 of Review of License Renewal Application for Ons,Units 1,2 & 3, That Staff Determines Has Generic Value to Industry ML20207C0501999-02-25025 February 1999 Submits Annual Rept Specifying Quantity of Each of Principal Radionuclides Released to Environment in Liquid & Gaseous Effluents,Per 10CFR72.44(d)(3).Effluent Release from ISFSI for CY98 Was Zero ML20202H7621999-01-28028 January 1999 Discusses Guidance Re License Renewal for Operating Power Reactors Developed in Response to FY99 Energy & Water Development Appropriations Act Rept 105-581 ML20202J1901999-01-28028 January 1999 Discusses License Renewal for Operating Power Reactors.Two Applications Received for Renewing Operating Licenses. Commission Established Adjudicatory Schedule Aimed at Completing License Renewal Process in 30-36 Months ML20198S8721999-01-0707 January 1999 Responds to Message to Marks Re Info Request on Appeal Deadline & Desire to Serve Appeal Either by e-mail or by Alternative Regular Mail ML20198Q8871999-01-0707 January 1999 Responds to to Chairman SA Jackson Re Issues for Consideration for Commission During Oconee License Renewal Process.Commissioners Must Remain Impartial During Pendency of Case.Copy of Order LBP-98-33 Encl.Served on 990107 ML20198Q8971998-12-17017 December 1998 Expresses Concerns Re License Renewal of Duke Energy,Oconee Nuclear Station,Units 1,2 & 3.Commends NRC on Steps Agency Has Undertaken to Conclude Renewal Process.With Certificate of Svc.Served on 990107 05000269/LER-1998-012, Forwards LER 98-012-01,re RB Spray Pumps Being Declared Inoperable Due to Npsh.Rept Has Been Revised to Indicate Results of Testing & Corrective Actions Taken to Date1998-12-0303 December 1998 Forwards LER 98-012-01,re RB Spray Pumps Being Declared Inoperable Due to Npsh.Rept Has Been Revised to Indicate Results of Testing & Corrective Actions Taken to Date 05000269/LER-1998-013, Forwards LER 98-013-00 Re Condition Prohibited by Ts,Per 10CFR50.73(a)(1)(d).Circumstances & Causes for Event Have Not Been Fully Determined & Will Be Provided in Supplemental LER on or Before 9812021998-11-0202 November 1998 Forwards LER 98-013-00 Re Condition Prohibited by Ts,Per 10CFR50.73(a)(1)(d).Circumstances & Causes for Event Have Not Been Fully Determined & Will Be Provided in Supplemental LER on or Before 981202 ML20155D2651998-10-23023 October 1998 Expresses Appreciation for Supporting Commission Initiative in Issuing Recent Statement of Policy on Conduct of Adjudicatory Proceedings.Case-specific Orders Were Issued in Calvert Cliffs & Oconee License Renewal Proceedings ML20155B1481998-10-21021 October 1998 Informs That as Result of Discussion of Issues Re Recent Events in Ice Condenser Industry,Ice Condenser Mini-Group (Icmg),Decided to Focus Efforts on Review & Potential Rev of Ice condenser-related TS in Order to Clarify Issues ML20154B9421998-09-30030 September 1998 Amends Chattooga River Watershed Coalition Petition to Intervene in Proceedings Re Application of Duke Energy Corp to Renew OLs for Oconee Nuclear Station,Units 1,2 & 3 ML20154A8971998-09-30030 September 1998 Requests That Submitted Info Be Attached to Amends to Petition to Intervene in Proceedings Re Application of Duke Energy Corp to Renew Operating Licenses for Units 1,2 & 3 ML20153H6881998-09-27027 September 1998 Requests Consideration of Motion to Enlarge Time Required to Submit Amended Petition to Intervene in Proceeding Re Application of Duke Energy Corp to Renew OLs for Facilities ML20153E4721998-09-24024 September 1998 Forwards Notices of Appearances for Attorneys Representing Duke Energy Corp,Applicant in Proceeding for License Renewal of Oconee Units 1,2 & 3.With Certificate of Svc ML20153D1831998-09-17017 September 1998 Ack Receipt of of Duke Energy Co Inviting Reconsideration of Denial by NRC CFO of Duke Exemption Request from Annual Fee Requirements for General License Under 10CFR171.11(d) ML20151S7501998-08-31031 August 1998 Provides Update on Commitment Made by Licensee in Response to NOV & Imposition of Civil Penalty Re Valves in Ldst Instrument Lines That Were Incorrectly Translated Into Station Procedures ML20237B0871998-08-11011 August 1998 Informs That NRC Plans to Administer Gfes of Written Operator Licensing Exam on 981007.Sample Registration Ltr Encl ML20236V9581998-07-27027 July 1998 Forwards Corrected Pages 3.5-30b of 961211 & 3.16-2 of 970205 TS Bases.Old Amend Numbers Were Left on Pages.Rev Changes Footer on Both Pages to Reflect Bases Changes ML20236P9451998-07-15015 July 1998 Forwards Emergency Response Data Sys Implementation Documents Including Data Point Library Updates for Oconee (Number 255),Dresden (Number 257) & Susquehanna (Number 258) ML20153D1961998-07-0909 July 1998 Requests NRC Reconsider & Grant Util Request for Exemption from Duplicative License Fee Under 10CFR171.11(d) for Storage of Spent Nuclear Fuel at Oconee Nuclear Station ML20236J9871998-06-24024 June 1998 First Final Response to FOIA Request for Documents.Documents Listed in App a Already Available in Pdr.Documents Listed in App B Being Released in Entirety ML20247G0881998-05-14014 May 1998 Provides Rev 2 to Section 3.3, Instrumentation, in Support of TS-362 Amend Request.Position on Testing of Analog Trip Type Instruments W/Regard to Transition from CTS to ITS, Restated.Summary Description of Its/Bases Changes,Encl 05000269/LER-1998-002, Forwards LER 98-002-01 Re non-isolable Weld Leak on Pressurizer Surge Line Drain Pipe Which Resulted in Unit Shutdown1998-04-30030 April 1998 Forwards LER 98-002-01 Re non-isolable Weld Leak on Pressurizer Surge Line Drain Pipe Which Resulted in Unit Shutdown ML20217G0351998-03-26026 March 1998 Submits Ltr to Update Commitment Made by Oconee in Response to Subject Violation.Update Assures That Details of Particular CA Are Appropriately Contained in Docketed Correspondence ML20203J9301998-02-26026 February 1998 Submits Response to NRC Bulletin 88-008, Thermal Stresses in Piping Connected to Rcs. Suppl 1 to Bulletin Attached & Contains Listed Commitments ML20199J7441998-02-0202 February 1998 Responds to NRC Bulletin 96-004 for NUHOMS-24P Sf Storage Sys Used at Plant Site.Nrc Reviewed Response & Found Response to Be Acceptable ML20198K9321998-01-13013 January 1998 Ack Receipt of Requesting Exemption from 10CFR171 for ISFSI License SNM-2503 & General License Provisions of 72.214 ML20198M9361998-01-12012 January 1998 Responds to Request That rept,BAW-2303P,rev 3 Be Considered Exempt from Mandatory Public Disclosure.Determined That Info Sought to Be Withheld Contains Proprietary Commercial Info & Will Be Withheld from Public Disclosure ML20203C8481997-12-10010 December 1997 Forwards Emergency Response Data Sys Implementation Documents for Plants.W/O Encl 05000269/LER-1997-003, Forwards LER 97-003-01 Re post-LOCA Boron Dilution Design Basis Not Being Met.Rept Includes Updated Info & Revised Corrective Action1997-11-12012 November 1997 Forwards LER 97-003-01 Re post-LOCA Boron Dilution Design Basis Not Being Met.Rept Includes Updated Info & Revised Corrective Action ML20198Q5741997-11-0303 November 1997 Provides Suppl to Initial 971020 Application for Amend to TS Re SG Tubing Surveillance Requirements,In Response to NRC 971030 Request for Addl Info.Proprietary Rev 3 to BAW-2303P, OTSG Repair Roll Qualification Rept Encl.Rept Withheld ML20211P1591997-10-17017 October 1997 Ack Receipt of & Check for $330,000 in Payment for Civil Penalty.Corrective Actions Will Be Examined During Future Insp ML20217D7261997-10-0101 October 1997 Informs That Staff Intends to Use Working Draft SRP-LR as Aid in Reviewing License Renewal Submittals Received from Dpc,Other Licensees & Owners Groups.Policy Issues Will Be Referred to Commission for Resolution ML20211F7981997-09-25025 September 1997 Submits Response to Violations Noted in Insp Repts 50-269/97-10,50-270/97-10 & 50-287/97-10 & Proposed Imposition of Civil Penalty in Amount of $330,000.Corrective Actions:Ldst Instrument Mods on All Three Units Completed ML20217D9341997-09-22022 September 1997 Informs That NRC Staff Has Accepted Deferral of Completion of Certain Actions Requested by Bulletin 96-03, Potential of Plugging of ECCS Strainers by Debris in Boiling Water Reactor ML20211C8021997-09-18018 September 1997 Forwards Revised TS Amend Re Reactor Bldg Structural Integrity.Previously Submitted TSs Contained Editorial Error ML20210T7121997-09-0404 September 1997 Informs That Representatives from Oconee Who Compose LERs Would Like to Meet W/Staff & AEOD at Convenient Place & Time to Facilitate Process.Concerns Addressed in Encl ML20216G5821997-09-0404 September 1997 Informs That 970730 Submittal Re Oconee Nuclear Station, Units 1,2 & 3 Will Be Marked Proprietary & Being Withheld Per 10CFR2.790(b)(5) & Section 103(b) of AEC Act of 1954 IR 05000269/19970071997-08-27027 August 1997 Discusses Insp Repts 50-269/97-07,50-270/97-07,50-287/97-07, 50-269/97-08,50-270/97-08 & 50-287/97-08 on 970606 & Forwards Notice of Violation & Proposed Imposition of Civil Penalty in Amount of $330,000 ML20210N1531997-08-13013 August 1997 Confirms 970807 Telcon Between J Burchfield & R Carroll Re Management Meeting to Be Conducted at Oconee Nuclear Station on 970922.Purpose of Meeting to Discuss Oconee Emergency Power Project Initiatives ML20210M8381997-08-13013 August 1997 Confirms Conversation Between J Burchfield & R Carroll on 970807 Re Mgt Meeting to Be Conducted in Region II Ofc on 971113.Meeting to Discuss Status of Plant Performance Improvement Initiatives ML20210N1121997-08-12012 August 1997 Informs That NRC Plans to Administer Generic Fundamentals Exam Section of Written Operator Licensing Exam on 971008. Facililty Must Submit Either Ltr Indicating No Candidates Scheduled to Participate or Listing Names of Candidates ML20149J4841997-07-21021 July 1997 Forwards Addl Pages to Rev 5 to Duke Power Co Nuclear Security & Contingency Plan. Encl Withheld 1999-08-10
[Table view] Category:ENGINEERING/CONSTRUCTION/CONSULTING FIRM TO NRC
MONTHYEARML20235A1251987-12-16016 December 1987 Forwards Info Re Resource Technical Svcs,Inc,Including Summary of NRC Contract Work,Nrc Form 26 for Three Existing Contracts,Audit Info,Work History & Lists of Expertise Available for Special Insps & of Current Resource Svcs ML20136E5171985-10-11011 October 1985 FOIA Request for Operator Exam Results from 1979 - 1982 to Be Placed in PDR ML20112D8381984-04-10010 April 1984 FOIA Request for Draft Rept on Failure Modes & Effects Analysis of Events That Could Result in Steam Generator Overfill for Facility ML19317E7731973-09-0606 September 1973 Forwards Correctly Numbered 730802 Prehearing Transcript to Replace Misnumbered One.W/O Encl ML19312C3561972-11-15015 November 1972 Forwards Summary of Hydrologic Engineering Studies Pertaining to Facility Development ML19322B2581972-11-15015 November 1972 Submits Rept on Hydrologic Engineering Studies of Flood Potential for Keowee-Toxaway Development of Oconee Stations ML19322B2271970-09-0404 September 1970 Forwards Comments on Fsar,Vols 1-3,Amends 8-18 & on B&W Topical Repts BAW-10008,Parts 1 & 2, Review of Seismic Design.Concludes Design Adequate for Postulated Seismic Conditions.W/O Encl ML19322B2241970-08-12012 August 1970 Requests Deletion of Two Comments from Blume Preliminary Rept,Review of Seismic Design of Oconee Which Pertain to B&W Topical Repts BAW-10008,Parts 1 & 2 Re LOCA Seismic Disturbances ML19317E3651970-08-12012 August 1970 Notifies That Review of BAW-10008 Completed.Requests Deletion of Comment 5 & Revision of Comment 6 Re Seismic Design.Designs Presented in 700803 Informal Matl Acceptable ML19322B1751970-04-29029 April 1970 Comments on Seismic Design of Keowee Hydroelectric Facilities as It Relates to Oconee,In Response to NRC Request ML19322B1651970-04-0303 April 1970 Forwards Comments & Questions from Review of B&W Topical Repts BAW-10008,Parts 1 & 2 Re LOCA & Seismic Excitation ML19317E2401969-09-0202 September 1969 Forwards Seismic Review of FSAR Vols 1 & 2 Per Request ML19322B1461969-04-24024 April 1969 Comments on Amend 6 Re Mod in Design of Weir ML19322B1611969-02-0202 February 1969 Forwards Questions & Comments Resulting from Review of Fsar,Vols 1 & 2 ML19322B1971967-07-0505 July 1967 Comments on Stability of Proposed Submerged Weir in Intake Canal ML19317E2451967-06-23023 June 1967 Forwards Adequacy of Structural Criteria for Oconee Nuclear Station Units 1,2 & 3. ML19308B2431967-05-25025 May 1967 Forwards Draft Rept, Adequacy of Structural Criteria for Oconee Units 1,2 & 3. ML19319A7481967-02-14014 February 1967 Provides Questions Based on Review of Psar,Vols 1 & 2 1987-12-16
[Table view] Category:INCOMING CORRESPONDENCE
MONTHYEARML20209H6921999-07-15015 July 1999 Forwards Comments on Preliminary Accident Sequence Precursor Analysis Provided in NRC Re Operational Condition Reported in LER 269/1998-04 ML20206E4101999-04-26026 April 1999 Forwards Four Copies of Rev 9 Todpc Nuclear Security & Contingency Plan,Per 10CFR50.54(p)(2).Changes Do Not Decrease Safeguards Effectiveness of Plan.Encl Withheld,Per 10CFR73.21 ML20207C0501999-02-25025 February 1999 Submits Annual Rept Specifying Quantity of Each of Principal Radionuclides Released to Environment in Liquid & Gaseous Effluents,Per 10CFR72.44(d)(3).Effluent Release from ISFSI for CY98 Was Zero ML20198Q8971998-12-17017 December 1998 Expresses Concerns Re License Renewal of Duke Energy,Oconee Nuclear Station,Units 1,2 & 3.Commends NRC on Steps Agency Has Undertaken to Conclude Renewal Process.With Certificate of Svc.Served on 990107 05000269/LER-1998-012, Forwards LER 98-012-01,re RB Spray Pumps Being Declared Inoperable Due to Npsh.Rept Has Been Revised to Indicate Results of Testing & Corrective Actions Taken to Date1998-12-0303 December 1998 Forwards LER 98-012-01,re RB Spray Pumps Being Declared Inoperable Due to Npsh.Rept Has Been Revised to Indicate Results of Testing & Corrective Actions Taken to Date 05000269/LER-1998-013, Forwards LER 98-013-00 Re Condition Prohibited by Ts,Per 10CFR50.73(a)(1)(d).Circumstances & Causes for Event Have Not Been Fully Determined & Will Be Provided in Supplemental LER on or Before 9812021998-11-0202 November 1998 Forwards LER 98-013-00 Re Condition Prohibited by Ts,Per 10CFR50.73(a)(1)(d).Circumstances & Causes for Event Have Not Been Fully Determined & Will Be Provided in Supplemental LER on or Before 981202 ML20155B1481998-10-21021 October 1998 Informs That as Result of Discussion of Issues Re Recent Events in Ice Condenser Industry,Ice Condenser Mini-Group (Icmg),Decided to Focus Efforts on Review & Potential Rev of Ice condenser-related TS in Order to Clarify Issues ML20154B9421998-09-30030 September 1998 Amends Chattooga River Watershed Coalition Petition to Intervene in Proceedings Re Application of Duke Energy Corp to Renew OLs for Oconee Nuclear Station,Units 1,2 & 3 ML20154A8971998-09-30030 September 1998 Requests That Submitted Info Be Attached to Amends to Petition to Intervene in Proceedings Re Application of Duke Energy Corp to Renew Operating Licenses for Units 1,2 & 3 ML20153H6881998-09-27027 September 1998 Requests Consideration of Motion to Enlarge Time Required to Submit Amended Petition to Intervene in Proceeding Re Application of Duke Energy Corp to Renew OLs for Facilities ML20153E4721998-09-24024 September 1998 Forwards Notices of Appearances for Attorneys Representing Duke Energy Corp,Applicant in Proceeding for License Renewal of Oconee Units 1,2 & 3.With Certificate of Svc ML20151S7501998-08-31031 August 1998 Provides Update on Commitment Made by Licensee in Response to NOV & Imposition of Civil Penalty Re Valves in Ldst Instrument Lines That Were Incorrectly Translated Into Station Procedures ML20236V9581998-07-27027 July 1998 Forwards Corrected Pages 3.5-30b of 961211 & 3.16-2 of 970205 TS Bases.Old Amend Numbers Were Left on Pages.Rev Changes Footer on Both Pages to Reflect Bases Changes ML20153D1961998-07-0909 July 1998 Requests NRC Reconsider & Grant Util Request for Exemption from Duplicative License Fee Under 10CFR171.11(d) for Storage of Spent Nuclear Fuel at Oconee Nuclear Station ML20247G0881998-05-14014 May 1998 Provides Rev 2 to Section 3.3, Instrumentation, in Support of TS-362 Amend Request.Position on Testing of Analog Trip Type Instruments W/Regard to Transition from CTS to ITS, Restated.Summary Description of Its/Bases Changes,Encl 05000269/LER-1998-002, Forwards LER 98-002-01 Re non-isolable Weld Leak on Pressurizer Surge Line Drain Pipe Which Resulted in Unit Shutdown1998-04-30030 April 1998 Forwards LER 98-002-01 Re non-isolable Weld Leak on Pressurizer Surge Line Drain Pipe Which Resulted in Unit Shutdown ML20217G0351998-03-26026 March 1998 Submits Ltr to Update Commitment Made by Oconee in Response to Subject Violation.Update Assures That Details of Particular CA Are Appropriately Contained in Docketed Correspondence ML20203J9301998-02-26026 February 1998 Submits Response to NRC Bulletin 88-008, Thermal Stresses in Piping Connected to Rcs. Suppl 1 to Bulletin Attached & Contains Listed Commitments 05000269/LER-1997-003, Forwards LER 97-003-01 Re post-LOCA Boron Dilution Design Basis Not Being Met.Rept Includes Updated Info & Revised Corrective Action1997-11-12012 November 1997 Forwards LER 97-003-01 Re post-LOCA Boron Dilution Design Basis Not Being Met.Rept Includes Updated Info & Revised Corrective Action ML20198Q5741997-11-0303 November 1997 Provides Suppl to Initial 971020 Application for Amend to TS Re SG Tubing Surveillance Requirements,In Response to NRC 971030 Request for Addl Info.Proprietary Rev 3 to BAW-2303P, OTSG Repair Roll Qualification Rept Encl.Rept Withheld ML20211F7981997-09-25025 September 1997 Submits Response to Violations Noted in Insp Repts 50-269/97-10,50-270/97-10 & 50-287/97-10 & Proposed Imposition of Civil Penalty in Amount of $330,000.Corrective Actions:Ldst Instrument Mods on All Three Units Completed ML20211C8021997-09-18018 September 1997 Forwards Revised TS Amend Re Reactor Bldg Structural Integrity.Previously Submitted TSs Contained Editorial Error ML20210T7121997-09-0404 September 1997 Informs That Representatives from Oconee Who Compose LERs Would Like to Meet W/Staff & AEOD at Convenient Place & Time to Facilitate Process.Concerns Addressed in Encl ML20149J4841997-07-21021 July 1997 Forwards Addl Pages to Rev 5 to Duke Power Co Nuclear Security & Contingency Plan. Encl Withheld ML20141F1381997-06-25025 June 1997 Forwards Rev 4 to Nuclear Security Training & Qualification Plan, Per 10CFR50.4 ML20140C9531997-06-0303 June 1997 Requests NRC Approval of Amend to Oconee ISFSI to Obtain Commission Approval of Proposed Rev 6 to Encl Physical Security Plan.W/O Encls ML20148C8621997-05-22022 May 1997 Informs That TR BAW-2241P Will Be Ref in Future Submittals of P/T Limit Curve Revs for B&W Plants as Result of 970519 Telcon Between L Lois & J Taylor ML20141K1981997-05-19019 May 1997 Forwards Rev 6 to Duke Power Co Nuclear Security & Contingency Plan.Encl Withheld,Per 10CFR73.21 ML20138G8981997-04-30030 April 1997 Forwards Rev 5 to DPC Security & Contingency Plan.Encl Withheld ML20138B3421997-04-22022 April 1997 Submits Response to Request for Addl Info Re Proposed Amend to Reactor Bldg Structural Integrity Tech Specs.Info Provided in Attachments 2 & 3 Supersedes Revised Pages & Markup Pages in Attachment 1 & 2,respectively ML20137N0231997-03-26026 March 1997 Forwards Revised TS 3.1.6 Bases Pages Deleting Detection Time of Reactor Bldg Air Particulate Monitor for RCS Leak of 1 Gpm ML20137B4731997-03-12012 March 1997 Forwards Rev 3 to Security Training & Qualification Plan.Rev Withheld,Per 10CFR73.21 ML20134P3831997-02-18018 February 1997 Submits Clarification of Design Basis Requirements at ONS for Permanently Installed Insulation in Response to NRC Bulletin 93-002, Debris Plugging of Emergency Core Cooling Suction Strainers ML20138L2101997-02-14014 February 1997 Forwards Monthly Operating Repts for Jan 1997 for Oconee Nuclear Station,Units 1,2 & 3 & Revised Monthly Operating Status Repts for Dec 1996 ML20134G5511997-02-0404 February 1997 Requests Exemption to Requirements of 10CFR70.24 Re Criticality Accident Monitoring,Per 10CFR70.14(a) & 70.24(d) ML20133M5971997-01-13013 January 1997 Forwards Revs to Oconee Selected Licensee Commitments Manual ML20138G8411996-12-26026 December 1996 Submits Supplementatl Info Re Emergency Power Engineered Safeguards Functional Test Amend Request ML20132F0911996-12-17017 December 1996 Forwards Response to 961212 & 13 Telcons Re Amend to Licenses for Proposed Changes to Updated Final Safety Analysis Rept Re one-time Emergency Power Engineered Safeguards Functional Test 05000269/LER-1996-008, Forwards Suppl to LER 96-008 Concerning Missed Valve Surveillance Which Resulted in Borated Water Storage Tank Technical Inoperability1996-10-31031 October 1996 Forwards Suppl to LER 96-008 Concerning Missed Valve Surveillance Which Resulted in Borated Water Storage Tank Technical Inoperability ML20134H2231996-10-30030 October 1996 Forwards Revised TS 3.7 Bases,Indicating Info Deleted ML20129B2571996-10-16016 October 1996 Submits Addl Info Re 960220 Application for Amends to Licenses DPR-38,DPR-47 & DPR-55 Concerning Proposed Rev to Chemistry TS Sections 3.1.5,3.1.10 & 4.1,in Response to NRC Telcon Request.Revised TS Pages Encl ML20128H2731996-09-19019 September 1996 Forwards Public Version of Rev 96-06 to Plant Emergency plan.W/961003 Release Memo ML20117D5691996-08-23023 August 1996 Requests Exemption for Ons,Units 1 & 2 & Cns,Units 1 & 2 Iaw/Provisions of 10CFR73.5, Requirements for Physical Protection of Licensed Activities in Nuclear Power Reactors Against Radiological Sabotage ML20116F0051996-08-0101 August 1996 Forwards Corrected Page for Proposed Amend to TS Re Removal of Es Signal from Valves LPSW-4 & LPSW-5 ML20117E6031996-06-26026 June 1996 Forwards Public Version of Change 2 to RP/0/B/1000/01, Emergency Classification & Change 4 to RP/0/B/1000/22, Procedures for Site Fire Damage Assessment & Repair ML20112A0581996-05-14014 May 1996 Responds to NRC Bulletin 96-002, Movement of Heavy Loads Over Spent Fuel,Over Fuel in Reactor Core or Over Safety-Related Equipment ML20115C4371996-05-13013 May 1996 Responds to NRC Bulletin 96-02, Movement of Heavy Loads Over Spent Fuel,Over Fuel in Reactor Core,Or Over Safety-Related Equipment, ML20117D4931996-04-24024 April 1996 Submits Clarification of Reporting Requirements Under 10CFR50.72(b)(2)(vi) ML20107K4991996-04-19019 April 1996 Forwards Rev 2 to Security Training & Qualification Plan. Changes Identified in Rev 2 Do Not Decrease Effectiveness of Plan & Thereby Submitted,Per 10CFR50.54(p),(2).Rev Withheld, Per 10CFR73.21 ML20107K5361996-04-18018 April 1996 Forwards Rev 4 to Util Security & Contingency Plan 1999-07-15
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- 1. In accordance with contract i AT(49-24)-008, dated 31 October 1972, and j ossociated understandings, I have made hydrologic engineering studies pertaining to the Keowee-Toxoway development of the Duke Power Company's Oconee Nuclear Station in Oconee County, South Carolino. A concise summary of my findings and conclusions is presented herein. Supporting technical details in documented form are available for your review if desired,
- 2. The assignment related specially to the following:
l o. Computation of probable maximum flood (PMF) hydrogrcphs of inflow into Jocassee and Keowee Reservoin, respectively;
- b. Routing of the PMF hydrographs through Jocessee and Keowce Reservoin under critical ossumptions, to determine hydrographs of reservoir stages and outflow rates;
- c. Computation of wave chorouteristics and vertical heights of runup on em-bankments of the Jocassee, Keowee and Little River Doms, respectively, that might coin-cide with maximum reservoir stages during the probable maximum floods; '
- d. A summary of conclusions regarding estimates referred to above, particularly as
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they relate to the safety of the dams egoinst failure during^ extreme floods.-
- 3. The policy concepts, methods, hydrometeorological criterio, and basic flood routing ossumptions adhered to in the assignment conform essentially with those adopted by the Atomic Energy Commission to govem the determination of spillway copocities and freeboard requirements for very large doms, generally as summarized in the February 1972 draft,' Standard Format and Contents of Safety Analysis Reports for Nuclear Power Plo,t.:.
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Mr. L. G. Hulman Page 2 November 15, 1972 i i
PERTINENT DATA
- 4. Following is a brief summary of physical features that relate to the studies:
- a. Keowee Lake, controlling 439 se,oore miles, is formed by a 150-foot high earthfill dom on the Keowee River and a l'0-foot high earthfill dom on Little River; o
" connecting canal" joins lakes formed by thue two doms, and is large enough to allow the two lakes to act as one. The Keowee and Little River Doms each have top eleva-tions of 815' msl. On each dom the upstream embankment is surfaced with dumped rock for erosion protection above elevation 772' mst, which has a slope at l' V to 2.0' H.
The downstream embankment has a slope of l' V to 2.5' H.
- b. The 385-foot high rockfill Jocessee Dom, located about 12 miles upstream
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from Keowee Dam, controls 148 square miles of the total 439 square mile basin above
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the Keowee-Little River Doms. The top elevation of the embankment is 1125' msl.
Upstream and downstream rockfill embankments each have a slope of l' V to 1.75' horizontal in the upper 100 feet of elevation, which includes the zone considered in i estimating potential wave runup effects.
- c. Keowee Lake has a gross storage capacity of 956,000 acre-feet at a normal full-pool elevation of 800' msl, with a surface creo of 18,372 acres (29 square miles).
The Jocassee Reservoir has a gross storage capacity of 1,160,000 acre-feet at a normal full-pool elevation of 1,110 feet msi, and a surface creo of 7565 acres (12 square miles).
- d. The Keowee Dom spillway consists of four tainter gates, 38' W x 35' H, with a crest elevation of 765' mst and a total discharge capacity of 106,000 cubic feet per second at a normal full pool level of 800' msl. The Jocessee spillway has two tainter gates, 38' W x 33' H, crest elevation 1077' msl, with a combined capacity of 46,200 cfs at a normal full-pool level of 1,110 msl.
- e. In addition to spillways, the Keowee and Jocessee Doms have power tur-bines ccpoble of discharging substantial quantities of water. Operating plans for Jocassee Dom provide for releases up to 15,000 cfs through power turbines to augment spillway discharges during floods, if needed. However, such turbine operations could be precluded by interruptions in power loadings or for other reasons under emergency conditions asso-ciated with extreme floods. Accordingly, in the studies reported herein, releases through power turbines were assumed as zero in routing the Probable Maximum Flood through the reservoirs.
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November 15,1972
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Mr. L. G. Hulman Page 3 CRITICAL FLOOD ESTIMATES
- 5. Probable Maximum Precipitation (PMP) estimates for the 439 square mile basin above !
Keowee Lake, and relevent sub-division thereof, were obtained from Hydrometeorological l Report No. 33 of the U. S. Weather Bureau (now NOAA). Alternative areal distributions of j PMP quantities were tested to develop critical flood producing relations. The Probable Maximum Flood from the 148 square mile basin above Jocassee Dom would result when the heaviest PMP concentration occurred over this area; the critical PMF hydrograph at Keowee Dom would result with the heaviest PMP omounts concentroted over the 291 square mile intermediate creo between Jocessee and the dams forming Keowee Lake. PMF hydrographs were computed by application of synthetic unit hydrographs to estimates of PMP rainfall-excess assuming on infiltration index of .05 inch per hour. The synthetic unit hydrographs were derived for component drainage creas tributary to full reservoirs to account for the accelerating effects of unusually lcrge water surfaces of lake Keowee and Lake Jocessee at normal full pool elevations, which represent more than 9 percent of the total 439 square mile drainage area. The selection of coefficients used in developing synthetic unit hydregraphs
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were based on studies cf unit hydrographs derived from analyses of major floods.
- 6. The computed PMF hydrograph of inflow into Jocessee Lake had a peak of 245,000 cfs, and a runoff volume of 210,000 acre-feet (26.6 inches runoff from 148 sq. mi.).
Assuming the reservoir would be filled to elevativ i 1,110' nsi at the beginning of the PMF, and all releases made through the two spillway gates, a peak reservoir stage of 1,122.5' msl was computed; stages exceeding 1,119.7' msl would prevail for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. The peak rate of reservoir outflow through the spillway would be 72,000 cfs.
- 7. The computed PMF hydrograph of inflow into Lake Keowee had a peak of 450,000 cfs, and a runoff volume of 550,000 acre-feet (23.5 inches runoff from 439 square miles).
Assuming the reservoir would be initially filled to elevation 800' mst, and all releases made through the four spillway gates, o peak reservoir level of 809.8' msl was computed; levels exceeding 806.6' mst would prevail for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. These values are predicated on the )
assumption that all concurrent releases from Jocassee Ressivoir are made through the spill- l l
way, without flows through power turbines.
FREEBOARD FOR WAVE ACTION
- 8. Following is a review of the apparent odequacy of existing dams to safely accom-modate wave action in Lake Jocassee and Lake Keowee in the event high winds blowing toward the dams should prevail for several hours while reservoir levels are equal to or near the maximum elevations indicated for PMF conditions. Relevant procedures and computo-tional aids contained in publications by the Army Corps of Engineers (EC 1110-2-27, and ETL 1110-2-8, dated 1 August 1966) were used in the analyses.
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Mr. l.. ' G. Hulman Page 4 November 15, 1972
- 9. Wind records and analyses show that wind velocities as high as 35 to 40 miles per hour over-land, for durations of 1 to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, may occur infrequently in the vicinity of Lake Jocos:ce and Lake Keowee. Research studies indicate that over-land wind velocities of 35 to 40 mph would accelerate approximately 25 percent over the open water surfaces near the dams - that is to over-water velocitics of 44 to 50 mph. Whether or not such winds raight coincide with peak reservoir levels during the PMF, and be oriented over the
" effective fetch" in a critical direction toward the respective doms, is largely a matter of conjecture, in general, studies show that wind directions tend to change substantially over local orcos os storm centers move, even though velocities in various directions may persist at high rates for several hours.
In general recognition of the improbability of the most critical wind velocity-duration-direction relations coinciding with maximum reservoir levels, the publications cited above provide for adoption of " design wind" criteria that are con-sidered reasonable on the basis of avoilable dato and design objectives involved. Estimates bmod on these criteria are used as aids to over all judgement of possible wave effects on ,
project features. In the instant case, o " design wind" corresponding to on over-land '
velocity of 25 mph for a period of 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> wcs considered reasonable in estimating heights of runup that might be expected during the PMF. However, the possible effects of wave action that could conceivably result from winds equal to 40 mph over-land were also considered to ossure that hozords from possible breaching of the dams from wave erosion would not exist even during extreme conditions. (Wind velocities cited horcin refer to "over-land" rates; however, corrections for velocity increases over water have been accounted for in wave 1
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computations).
- 10. The Jocassee Dom top elevation of 1125' msl provides a freeboard of 2.5' above the computed maximum reservoir level during the PMF elevation 1122.5' msl. Computations indicate that a sustained wind velocity equivalent to 25 mph over-land, acting on a 2.5 mile
" effective fetch," could result in "significant waves" (hs) 1.9 feet high, which would break and run up the face of Jocassee Dom to a vertical height of opproximately 2.5 feet above
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reservoir leve'ls prevailing during the PMF; a negligible amount of wave splash or over-wash !
from waves exceeding hs might pass over the crest of the dom. For corresponding conditions o sustained wind velocity equal to 40 mph over-land would produce runup upproximately 1.5 feet higher, and moderate amounts of wove-splash and wave over-wash might pass over the crest of the dom foro period of a few hours, ,
in view of the chorocteristics of the rockfill !
embankments of Jocessee Dom, it is concluded that this wave action would not be sufficient to represent any risk of breaching of the embankment of Jocassee Dom.
- 11. The_ Keowee Dum top elevation of 815' mst providcsa freeboord of 5.2 feet above the computed maximum rese voir level during the PMF elevation 809.8' msl. A sustained wind velocity comparabic to 40 mph over-land, blowing toward the dum over on effective fetch of 2.2 miles would produce significant waves 3.2'. high, capable of running up '
4.0 feet on the riprop embankment (slope 1:2); the maximum wave in a spectrum of 100 waves would run~ up about one foot higher. Accordingly, computations indicate that Keowee Dom is high enough to prevent wave over-wash under the most cirtical PMF conditions. The some i
conclusion is applicable to Little River Dom, where the effective fetch _(1.9 miles) is less than for the'Keowee Dom.
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4 Page 5 November 15, 1972 Mr. L. G. Hulman
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CONCLUSIONS !
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- 12. Procedures and Criteria. The policy concepts, methods, hydrometeorological criteria, and basic flood routing assumptions used in the subject studies are consistent with sound engineering practices associated with the design of very large dams in the 11nited i States; they foster a safe degree of conseivatism in evaluations pertaining to the projects covered by this report.
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- 13. Jocassee Dam and Reservoir.
- a. The Probable Maximum Flood hydrograph of inflow into take Jocassee would l
have a peak discharge of approximately 245,000 cfs, and a runoff volume of 210,000 acre-feet.
- b. A maximum reservoir level of 1,122.5' mst c.ould be attained in Lake Jocassee during the PMF under the most adverse circum tances considered reasonably possible.
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- c. The top clevation of 1,125' mst of Jocassee Dam provides a freeboard allowance for possible wave runup on the rockfill embankment equal to 2.5 feet above the peak PMF l j reservoir level (1,122.5' msl) estimated herein. It is remotely possible that sustained wind velocities (equal to 25 to 40 mph over land), blowing toward the dam could cause wave l j runup and some wave over-wash of the Jocassee embankment for a few hours during the PM However, the rockfill composisjon of the dam embankment is such as to preclude breaching of l the embankment from wave wash of thogeneral magnitude indicated. j 1
- 14. Keowee and Little River Doms. I c.
The Probable Maximum Flood Hydrograph of inflow into Lake Keowee would i have a peak discharge of approximately 450,000 cfs and a runoff volume of 550,000 acre-feet.
- b. A maximum reseivoir level of approximately 810.' mst could be attained in Lake Keowee during the PMF under the most critical circumstances considered reasonably possible.
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- c. It is remotely possible that sustained wind velocities (40 mph or less over land),
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blowing toward the dams during the PMF could cause wave runup on the riprop covered face of each dam opproaching crest elevation 815' msl. '
ff ALBERT L. COCHRAN d ^
Director of Special Projeurs Lyles, Bissett, Carlisle & Wolff ALC:ad
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