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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20217P6171999-10-21021 October 1999
Forwards non-proprietary & Proprietary Versions of HI-982083, Licensing Rept for Byron & Braidwood Nuclear Stations. Proprietary Rept Withheld,Per 10CFR2.790(b)(4)
ML20217M4361999-10-19019 October 1999
Forwards Rev 46 to Braidwood Station Security Plan, IAW 10CFR50.4(b)(4).Description of Changes,Listed.Encl Withheld Per 10CFR73.21
ML20217H4661999-10-18018 October 1999
Forwards Changes to EPIPs IAW 10CFR50.54(q) & 10CFR50,App E, Section V.Details of Changes Encl
ML20217G9791999-10-14014 October 1999
Forwards SE Accepting Relief Requests to Rev 5 of First 10-year Interval Inservice Insp Program for Plant,Units 1 & 2
ML20216J8241999-09-30030 September 1999
Notifies of Removal of NRC Headquarters & Region III Offices from Controlled Copy Distribution of Certain CE Documents. Specific Documents,Associated Controlled Copy Numbers & NRC Location Affected Are Shown on Attachment to Ltr
ML20217A9311999-09-29029 September 1999
Informs That NRC 6-month Review of Braidwood Identified That Performance in Maint Area Warranted Increased NRC Attention. Addl Insps Beyond Core Insp Program Will Be Conducted Over Next 6 Months to Better Understand Causes of Problem
ML20216H4301999-09-23023 September 1999
Informs That Arrangements Made for Administration of Licensing re-take Exams at Braidwood Generating Station for Week of 991108
ML20216F7441999-09-17017 September 1999
Forwards Insp Repts 50-456/99-13 & 50-457/99-13 on 990706-0824.Three Violations Noted & Being Treated as Ncvs. Insp Focused on C/As & Activities Addressing Technical Concerns Identified During Design Insp Completed on 980424
ML20212A6991999-09-10010 September 1999
Forwards SE Accepting Licensee Second 10-year Interval ISI Program Request for Relief 12R-07 for Plant,Units 1 & 2
ML20211Q9011999-09-0808 September 1999
Advises That Us Postal Service Mailing Address Has Changed for Braidwood Station.New Address Listed
ML20211Q6611999-09-0606 September 1999
Informs That NRC Tentatively Scheduled Initial Licensing Exam for Braidwood Operator License Applicants During Wk of 010115 & 22.Validation of Exam Will Occur at Station During Wk of 001218
ML20211P1901999-09-0303 September 1999
Forwards Insp Repts 50-456/99-12 & 50-457/99-12 on 990707-0816.No Violations Noted.Insp Generally Characterized by safety-conscious Operations,Sound Engineering & Maint Practices & Careful Radiological Work Controls
ML20211P1761999-09-0202 September 1999
Discusses Licensee Aug 1998 Rev 3K to Portions of Braidwood Nuclear Power Station Generating Stations Emergency Plan Site Annex Submitted Under Provisions of 10CFR50.54(q). NRC Approval Not Required
ML20211K1081999-09-0202 September 1999
Responds to Request for Addl Info to GL 92-01,Rev 1,Suppl 1, Reactor Vessel Structural Integrity, for Braidwood,Units 1 & 2 & Byron,Unit 2
ML20211G1221999-08-27027 August 1999
Forwards fitness-for-duty Program Performance Data for Each of Comm Ed Nuclear Power Stations & Corporate Support Employees within Scope of Rule for six-month Period Ending 990630,IAW 10CFR26.71(d)
ML20211B8691999-08-20020 August 1999
Forwards Insp Repts 50-254/99-10,50-265/99-10,50-454/99-09, 50-455/99-09,50-456/99-10 & 50-457/99-10 on 990628-0721. Action Plans Developed to Address Configuration Control Weaknesses Not Totally Effective as Listed
BW990053, Forwards post-outage Summary Rept for ISI Examinations Conducted During Seventh Refueling Outage of Braidwood Station,Unit 21999-08-13013 August 1999
Forwards post-outage Summary Rept for ISI Examinations Conducted During Seventh Refueling Outage of Braidwood Station,Unit 2
BW990052, Informs That RW Clay,License OP-31044,no Longer Requires Operator License at Braidwood Station1999-08-12012 August 1999
Informs That RW Clay,License OP-31044,no Longer Requires Operator License at Braidwood Station
ML20210N5651999-08-0606 August 1999
Forwards Rev 8 to Nuclear Generating Stations Emergency Plan, for Plants.With Summary of Changes
ML20210U8031999-08-0404 August 1999
Forwards SER Granting Licensee Relief Requests VR-1,VR-3 & Portion of VR-2 Pursuant to 10CFR50.55a(a)(3)(ii).Relief Request VR-4 Does Not Require Explicit NRC Approval for Second 10-year Inservice Testing Program
BW990049, Informs NRC of Plans to Demonstrate Compliance with 10CFR50.46 Requirements for Fuel Predicted to Experience Fuel Pellet to Rod Cladding Gap Reopening,During Current Cycle1999-08-0404 August 1999
Informs NRC of Plans to Demonstrate Compliance with 10CFR50.46 Requirements for Fuel Predicted to Experience Fuel Pellet to Rod Cladding Gap Reopening,During Current Cycle
ML20210M9131999-08-0202 August 1999
Forwards Response to NRC AL 99-02, Operating Reactor Licensing Action Estimates, for Fys 2000 & 2001 for Comed
ML20210K9761999-07-30030 July 1999
Forwards SE Accepting Licensee 60-day Response to GL 96-05, Periodic Verification of Design Basis Capability of Safety-Related Movs, for Plant
ML20210K0771999-07-30030 July 1999
Submits 30-day Rept Re Discovery of ECCS Evaluation Model Error for Byron & Braidwood Stations,As Required by 10CFR50.46
ML20210G6291999-07-29029 July 1999
Forwards Insp Repts 50-456/99-11 & 50-457/99-11 on 990525-0706.Two Violations Noted & Being Treated as NCV, Consistent with App C of Enforcement Policy
ML20210J8951999-07-29029 July 1999
Submits Other Actions,As Described,To Be Taken for Valves to Resolve Potential Pressure Locking Concerns,In Light of Extended Period for Valve Bonnet Natural Depressurization,In Response to GL 95-07, Pressure Locking & Thermal..
BW990045, Forwards Errata to 1998 Radioactive Effluent Release Rept. Info Has Been Corrected & Revised Spreadsheets Included in Attachment to Ltr1999-07-28028 July 1999
Forwards Errata to 1998 Radioactive Effluent Release Rept. Info Has Been Corrected & Revised Spreadsheets Included in Attachment to Ltr
ML20216D3781999-07-21021 July 1999
Forwards Revised NFM9900022, Braidwood Unit 2 Cycle 8 COLR on ITS Format & W(Z) Function, to Account for Error That W Discovered in Computer Code Used to Calculate PCT During LBLOCA
ML20210C3961999-07-20020 July 1999
Forwards Insp Repts 50-456/99-09 & 50-457/99-09 on 990517-0623.No Violations Noted.Weakness Identified on 990523,when Station Supervisors Identified Individual Sleeping in Cable Tray in RCA
ML20216D7061999-07-19019 July 1999
Forwards Rev 45 to Braidwood Station Security Plan,Iaw 10CFR50.4(b)(4).Plan Includes Listed Changes.Rev Withheld, Per 10CFR73.21
ML20210B7071999-07-16016 July 1999
Responds to Requesting Review & Approval of Three Proposed Changes to Ceco QA TR,CE-1A Per 10CFR50.54(a)(3) & 10CFR50.4(b)(7)
BW990042, Forwards Braidwood Station,Unit 1 Post Accident Monitoring Rept for Reactor Vessel Level Indication Sys (Rvlis),Due to Facility Train B RVLIS Being Restored to Operable Status After 7-day Completion Time,Per TS 3.3.3 & 5.6.71999-07-16016 July 1999
Forwards Braidwood Station,Unit 1 Post Accident Monitoring Rept for Reactor Vessel Level Indication Sys (Rvlis),Due to Facility Train B RVLIS Being Restored to Operable Status After 7-day Completion Time,Per TS 3.3.3 & 5.6.7
ML20209H2991999-07-16016 July 1999
Withdraws 980529 LAR to Credit Automatic PORV Operation for Mitigation of Inadvertent Safety Injection at Power Accident.Response to NRC 990513 RAI Re LAR Encl
IR 05000456/19993011999-07-15015 July 1999
Forwards Operator Licensing Exam Repts 50-456/99-301OL & 50-457/99-301OL for Test Administered from 990607-11 to Applicants for Operating Licenses.Three Out of Four Applicants Passed Exams
BW990040, Forwards Revised Monthly Operating Repts for May 1999 for Braidwood Station,Units 1 & 2.Since Issuance of Rept,It Was Determined That Rt That Occurred on Unit 2 During Startup Was Inadvertently Omitted1999-07-15015 July 1999
Forwards Revised Monthly Operating Repts for May 1999 for Braidwood Station,Units 1 & 2.Since Issuance of Rept,It Was Determined That Rt That Occurred on Unit 2 During Startup Was Inadvertently Omitted
ML20209H5141999-07-14014 July 1999
Discusses 990701 Telcon Re Arrangements for NRC to Inspect Licensed Operator Requalification Program at Braidwood Nuclear Generating Station for Week of 990927,which Coincides with Licensee Regularly Scheduled Exam Cycle
ML20207H7501999-07-12012 July 1999
Forwards Revised Pressure Temp Limits Rept, for Byron Station,Units 1 & 2.Revised Pressurized Thermal Shock Evaluations,Surveillance Capsule Rept & Credibility Repts, Also Encl
ML20196J9131999-07-0101 July 1999
Submits Status of Nuclear Property Insurance Currently Maintained for Braidwood,Byron,Dresden,Lasalle County,Quad Cities & Zion Nuclear Power Stations,Per 10CFR50.54(w)(3)
ML20196J9061999-07-0101 July 1999
Provides Evidence That Util Maintains Guarantee of Payment of Deferred Premiums in Amount of $10 Million for Each of Thirteen Reactors,Per 10CFR140.21
ML20209B8241999-06-30030 June 1999
Forwards Five 3.5 Inch Computer Diskettes Containing Revised Annual Dose Repts for 1994 Through 1998 for Individuals Receiving Neutron Dose Not Previously Included in Reported Total Effective Dose Equivalent Values.Without Diskettes
ML20196H0631999-06-28028 June 1999
Provides Individual Exam Results for Licensee Applicants Who Took June 1999 Initial License Exam.Without Encls
ML20212H8241999-06-24024 June 1999
Informs That Effective 990531 NRC Project Mgt Responsibility for Byron & Braidwood Stations Was Transferred to Gf Dick
ML20196D4591999-06-18018 June 1999
Forwards Insp Repts 50-456/99-07 & 50-457/99-07 on 990414- 0524.No Violations Noted.Conduct of Activities Generally Characterized by safety-conscious Operations,Sound Engineering & Maintenance Practices
ML20196A6671999-06-17017 June 1999
Refers to 990609 Meeting with Util in Braidwood,Il Re Licensee Initiatives in Risk Area & to Establish Dialog Between SRAs & Licensee PRA Staff
05000457/LER-1998-003, Forwards LER 98-003-00 Re Unit 2 Reactor Trip.Actions & Associated Action Tracking Number That Braidwood Station Is Committed to Implement in Response to LER Described Below1999-06-16016 June 1999
Forwards LER 98-003-00 Re Unit 2 Reactor Trip.Actions & Associated Action Tracking Number That Braidwood Station Is Committed to Implement in Response to LER Described Below
05000456/LER-1998-004, Forwards LER 98-004-01,IAW 10CFR50.73(a)(2)(i)(B). LER 98-004 Included Commitment to Transmit Supplemental Rept by 990628,due to on-going Evaluations1999-06-16016 June 1999
Forwards LER 98-004-01,IAW 10CFR50.73(a)(2)(i)(B). LER 98-004 Included Commitment to Transmit Supplemental Rept by 990628,due to on-going Evaluations
05000456/LER-1999-001, Forwards LER 99-001-00,IAW 10CFR50.73(a)(2)(i)(B). Description of Action & Associated Action Request Number That Braidwood Station Is Committed to Implement Is Response to LER Is Listed1999-06-15015 June 1999
Forwards LER 99-001-00,IAW 10CFR50.73(a)(2)(i)(B). Description of Action & Associated Action Request Number That Braidwood Station Is Committed to Implement Is Response to LER Is Listed
ML20195J3741999-06-14014 June 1999
Forwards Insp Rept 50-457/99-08 on 990415-0518.No Violations Noted.Sg Insp Program Found to Be Thorough & Conservative
BW990028, Forwards Braidwood Unit 2 Cycle 8 COLR in ITS Format & W(Z) Function, IAW TS 5.6.51999-06-10010 June 1999
Forwards Braidwood Unit 2 Cycle 8 COLR in ITS Format & W(Z) Function, IAW TS 5.6.5
ML20195F3231999-06-0909 June 1999
Informs That in ,Arrangements Finalized for Exam to Be Administered at Plant During Wk of 990607.All Parts of Plant Initial Licensed Operator Exam Approved for Administration
1999-09-08
[Table view]
Category:INCOMING CORRESPONDENCE
MONTHYEARML20217P6171999-10-21021 October 1999
Forwards non-proprietary & Proprietary Versions of HI-982083, Licensing Rept for Byron & Braidwood Nuclear Stations. Proprietary Rept Withheld,Per 10CFR2.790(b)(4)
ML20217M4361999-10-19019 October 1999
Forwards Rev 46 to Braidwood Station Security Plan, IAW 10CFR50.4(b)(4).Description of Changes,Listed.Encl Withheld Per 10CFR73.21
ML20217H4661999-10-18018 October 1999
Forwards Changes to EPIPs IAW 10CFR50.54(q) & 10CFR50,App E, Section V.Details of Changes Encl
ML20216J8241999-09-30030 September 1999
Notifies of Removal of NRC Headquarters & Region III Offices from Controlled Copy Distribution of Certain CE Documents. Specific Documents,Associated Controlled Copy Numbers & NRC Location Affected Are Shown on Attachment to Ltr
ML20211Q9011999-09-0808 September 1999
Advises That Us Postal Service Mailing Address Has Changed for Braidwood Station.New Address Listed
ML20211G1221999-08-27027 August 1999
Forwards fitness-for-duty Program Performance Data for Each of Comm Ed Nuclear Power Stations & Corporate Support Employees within Scope of Rule for six-month Period Ending 990630,IAW 10CFR26.71(d)
BW990053, Forwards post-outage Summary Rept for ISI Examinations Conducted During Seventh Refueling Outage of Braidwood Station,Unit 21999-08-13013 August 1999
Forwards post-outage Summary Rept for ISI Examinations Conducted During Seventh Refueling Outage of Braidwood Station,Unit 2
BW990052, Informs That RW Clay,License OP-31044,no Longer Requires Operator License at Braidwood Station1999-08-12012 August 1999
Informs That RW Clay,License OP-31044,no Longer Requires Operator License at Braidwood Station
ML20210N5651999-08-0606 August 1999
Forwards Rev 8 to Nuclear Generating Stations Emergency Plan, for Plants.With Summary of Changes
BW990049, Informs NRC of Plans to Demonstrate Compliance with 10CFR50.46 Requirements for Fuel Predicted to Experience Fuel Pellet to Rod Cladding Gap Reopening,During Current Cycle1999-08-0404 August 1999
Informs NRC of Plans to Demonstrate Compliance with 10CFR50.46 Requirements for Fuel Predicted to Experience Fuel Pellet to Rod Cladding Gap Reopening,During Current Cycle
ML20210M9131999-08-0202 August 1999
Forwards Response to NRC AL 99-02, Operating Reactor Licensing Action Estimates, for Fys 2000 & 2001 for Comed
ML20210K0771999-07-30030 July 1999
Submits 30-day Rept Re Discovery of ECCS Evaluation Model Error for Byron & Braidwood Stations,As Required by 10CFR50.46
ML20210J8951999-07-29029 July 1999
Submits Other Actions,As Described,To Be Taken for Valves to Resolve Potential Pressure Locking Concerns,In Light of Extended Period for Valve Bonnet Natural Depressurization,In Response to GL 95-07, Pressure Locking & Thermal..
BW990045, Forwards Errata to 1998 Radioactive Effluent Release Rept. Info Has Been Corrected & Revised Spreadsheets Included in Attachment to Ltr1999-07-28028 July 1999
Forwards Errata to 1998 Radioactive Effluent Release Rept. Info Has Been Corrected & Revised Spreadsheets Included in Attachment to Ltr
ML20216D3781999-07-21021 July 1999
Forwards Revised NFM9900022, Braidwood Unit 2 Cycle 8 COLR on ITS Format & W(Z) Function, to Account for Error That W Discovered in Computer Code Used to Calculate PCT During LBLOCA
ML20216D7061999-07-19019 July 1999
Forwards Rev 45 to Braidwood Station Security Plan,Iaw 10CFR50.4(b)(4).Plan Includes Listed Changes.Rev Withheld, Per 10CFR73.21
BW990042, Forwards Braidwood Station,Unit 1 Post Accident Monitoring Rept for Reactor Vessel Level Indication Sys (Rvlis),Due to Facility Train B RVLIS Being Restored to Operable Status After 7-day Completion Time,Per TS 3.3.3 & 5.6.71999-07-16016 July 1999
Forwards Braidwood Station,Unit 1 Post Accident Monitoring Rept for Reactor Vessel Level Indication Sys (Rvlis),Due to Facility Train B RVLIS Being Restored to Operable Status After 7-day Completion Time,Per TS 3.3.3 & 5.6.7
ML20209H2991999-07-16016 July 1999
Withdraws 980529 LAR to Credit Automatic PORV Operation for Mitigation of Inadvertent Safety Injection at Power Accident.Response to NRC 990513 RAI Re LAR Encl
BW990040, Forwards Revised Monthly Operating Repts for May 1999 for Braidwood Station,Units 1 & 2.Since Issuance of Rept,It Was Determined That Rt That Occurred on Unit 2 During Startup Was Inadvertently Omitted1999-07-15015 July 1999
Forwards Revised Monthly Operating Repts for May 1999 for Braidwood Station,Units 1 & 2.Since Issuance of Rept,It Was Determined That Rt That Occurred on Unit 2 During Startup Was Inadvertently Omitted
ML20207H7501999-07-12012 July 1999
Forwards Revised Pressure Temp Limits Rept, for Byron Station,Units 1 & 2.Revised Pressurized Thermal Shock Evaluations,Surveillance Capsule Rept & Credibility Repts, Also Encl
ML20196J9061999-07-0101 July 1999
Provides Evidence That Util Maintains Guarantee of Payment of Deferred Premiums in Amount of $10 Million for Each of Thirteen Reactors,Per 10CFR140.21
ML20196J9131999-07-0101 July 1999
Submits Status of Nuclear Property Insurance Currently Maintained for Braidwood,Byron,Dresden,Lasalle County,Quad Cities & Zion Nuclear Power Stations,Per 10CFR50.54(w)(3)
ML20209B8241999-06-30030 June 1999
Forwards Five 3.5 Inch Computer Diskettes Containing Revised Annual Dose Repts for 1994 Through 1998 for Individuals Receiving Neutron Dose Not Previously Included in Reported Total Effective Dose Equivalent Values.Without Diskettes
05000457/LER-1998-003, Forwards LER 98-003-00 Re Unit 2 Reactor Trip.Actions & Associated Action Tracking Number That Braidwood Station Is Committed to Implement in Response to LER Described Below1999-06-16016 June 1999
Forwards LER 98-003-00 Re Unit 2 Reactor Trip.Actions & Associated Action Tracking Number That Braidwood Station Is Committed to Implement in Response to LER Described Below
05000456/LER-1998-004, Forwards LER 98-004-01,IAW 10CFR50.73(a)(2)(i)(B). LER 98-004 Included Commitment to Transmit Supplemental Rept by 990628,due to on-going Evaluations1999-06-16016 June 1999
Forwards LER 98-004-01,IAW 10CFR50.73(a)(2)(i)(B). LER 98-004 Included Commitment to Transmit Supplemental Rept by 990628,due to on-going Evaluations
05000456/LER-1999-001, Forwards LER 99-001-00,IAW 10CFR50.73(a)(2)(i)(B). Description of Action & Associated Action Request Number That Braidwood Station Is Committed to Implement Is Response to LER Is Listed1999-06-15015 June 1999
Forwards LER 99-001-00,IAW 10CFR50.73(a)(2)(i)(B). Description of Action & Associated Action Request Number That Braidwood Station Is Committed to Implement Is Response to LER Is Listed
BW990028, Forwards Braidwood Unit 2 Cycle 8 COLR in ITS Format & W(Z) Function, IAW TS 5.6.51999-06-10010 June 1999
Forwards Braidwood Unit 2 Cycle 8 COLR in ITS Format & W(Z) Function, IAW TS 5.6.5
ML20195E3451999-06-0707 June 1999
Forwards 3.5 Inch Computer Diskette Containing Revised File Format for Annual Dose Rept for 1998,per 990520 Telcon Request from Nrc.Each Station Data Is Preceded by Header Record,Which Provides Info Necessary to Identify Data
ML20195D6351999-06-0404 June 1999
Notifies NRC of Actions That Has Been Taken in Accordance with 10CFR26, Fitness for Duty Programs
05000457/LER-1999-002, Forwards LER 99-002-00,IAW 10CFR50.73(a)(2)(iv).Commitments Made by Util Are Listed1999-05-21021 May 1999
Forwards LER 99-002-00,IAW 10CFR50.73(a)(2)(iv).Commitments Made by Util Are Listed
ML20195B2301999-05-19019 May 1999
Requests Approval of Proposed Changes to QA Topical Rept CE-1-A,rev 66a.Attachment a Describes Changes,Reason for Change & Basis for Concluding That Revised QAP Incorporating Proposed Changes Continues to Satisfy 10CFR50AppB
ML20206T3351999-05-17017 May 1999
Provides Written follow-up of Request for NOED Re Extension of Shutdown Requirement of TS Limiting Condition for Operation 3.0.3.Page 9 of 9 of Incoming Submittal Not Included
ML20206N7861999-05-14014 May 1999
Forwards 1998 Annual Radiological Environ Operating Rept for Braidwood Station. Rept Contains Info Associated with Stations Radiological Environ & Meteorological Monitoring Programs
ML20206Q8521999-05-13013 May 1999
Submits Rept on Numbers of Tubes Plugged or Repaired During SG Inservice Insp Activities Conducted During Plant Seventh Refueling outage,A2R07,per TS 5.6.9
ML20210C7221999-05-0303 May 1999
Forwards Initial License Exam Matls for Review & Approval. Exam Scheduled for Wk of 990607
ML20206F5381999-04-30030 April 1999
Forwards Magnetic Tape Containing Annual Dose Repts for 1998 for Braidwood,Byron,Dresden,Lasalle County,Quad Cities & Zion Nuclear Power Stations,Per 10CFR20.2206(c).Without Magnetic Tape
ML20206E3991999-04-29029 April 1999
Forwards 1998 Annual Environ Operating Rept & Listed Attachments Included in Rept.Without Encls
ML20206C7901999-04-23023 April 1999
Provides Suppl Info Re Use of W Dynamic Rod Worth Measurement Technique,As Requested During 990413 Telcon.Rev Bars in right-hand Margin Identify Changes from Info Submitted by
ML20206B3941999-04-21021 April 1999
Forwards Annual & 30-Day Rept of ECCS Evaluation Model Changes & Errors, for Byron & Braidwood Stations.Updated Info Re PCT for Limiting Small Break & Large Break LOCA Analysis Evaluations & Detailed Description of Errors
ML20205S9621999-04-20020 April 1999
Responds to 981203 RAI Telcon Re SG Tube Rupture Analysis for Byron Station,Unit 2 & Braidwood Station,Unit 2.Addl Info & Subsequent Resolution of Issues Discussed During 990211 Telcon Are Documented in Encl
ML20206B0821999-04-20020 April 1999
Requests to Reschedule Breaker Maint Insp for Either Wk of 990607 or One of Last Two Wks in Jul 1999,in Order to Better Accommodate Insp Activity
ML20206B2471999-04-20020 April 1999
Informs That SE Kuczynski Has Been Transferred to Position No Longer Requiring SRO License.Cancel License SOP-31030-1, Effective 990412
ML20206B0251999-04-14014 April 1999
Forwards Reg Guide 1.16 Rept for Number of Personnel & Person-Rem by Work Job Function for 1998. Associated Collective Deep Dose Equivalent Reported According to Work & Job Functions
ML20205K3581999-04-0606 April 1999
Submits Request to Reschedule Breaker Maint Insp for Braidwood Nuclear Power Station for Either Wk of 990607 or One of Last Two Wks in Jul 1999
ML20205K5841999-03-31031 March 1999
Submits Rept on Status of Decommissioning Funding for Reactors Owned by Comm Ed.Attachment 1 Contains Amount of Decommissioning Funds Estimated to Be Required Pursuant to 10CFR50.75(b) & (C)
ML20210C7181999-03-30030 March 1999
Forwards Integrated Exam Outline Which Plant Submitting for Review,Comment & Approval for Initial License Exam Scheduled for Wk of 990607
ML20205E6401999-03-26026 March 1999
Forwards Proprietary Ltr Re Notification of Corrected Dose Rept for One Individual,Per 1997 Annual Dose Repts for All Comed Nuclear Power Facilities,Submitted 970430.Proprietary Info Withheld
ML20205B4241999-03-23023 March 1999
Provides Results of drive-in Drill Conducted on 990208,as Well as Augmentation Phone Drills Conducted Since 981015,as Committed to in Util
ML20207J4321999-03-0808 March 1999
Forwards Braidwood Station ISI Outage Rept for A1R07, Per Requirements of ASME Section Xi,Article IWA-6200
ML20205C6861999-03-0404 March 1999
Provides Notification That Byron Station Implemented ITS on 990205 & Braidwood Station Implemented ITS on 990219
1999-09-08
[Table view] |
Text
..
. at ' er tin $t I n
- Route *l, tiox 81 Ilramille, 11.60107 % I9 Tel Hl5-45&2801 November 13,1995 BW/95-0110 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555
Subject:
Comed Braidwood Station Unit 1 Fifth Refuel Outage Steam Generator Inservice Inspection Report Docket No. STN 50-456
References:
(1) NUREG-1276, Technical Specifications, Braidwood Station, Unit Nos. I and 2 Gentlemen:
Specification 4.4.5.5.c of reference (1) requires that results of steam generator (SG) tube inspections which fall into Category C-3 shall be reported in a Special Report to the Commission pursuant to Specification 6.9.2 within 30 days and prior to resumption of plant operation. This report shall provide a description ofinvestigations conducted to determine the cause of tube degradation and corrective measures '.aken to prevent recurrence.
The initial sample inspection resulted in the following SGs being classified into Category C-3 based on the number of defective tubes found this outace:
lA On October 27,1995 at 22:00 hours IB On October 24,1995 at 16:55 hours IC On October 29,1995 at 21:00 hours ID On October 29,1995 at 21:45 hours Notification per Technical Specification Table 4.4-2 pursuant to 10 CFR 50.72(b)(2)(i) for Steam Generators being classified in Category C-3 was initiated. Notification was made based on the only approved Technical Specification SG tube plugging criteria being 40%
through-wall degradation. The 1.0 Volt Interim Plugging Criteria that was in effect for Braidwood Unit 1 Cycle 5 had expird At the time of the inspection, the Technical Specification amendment for a 3.0 Volt Interim Plugging Criteria had not been approved by the NRC. The 3.0 Volt Interim Plugging Criteria was approved by the NRC on j November 9,1995, in a letter from M. D. Lynch to D. L. Farrar, " ISSUANCE OF AhENDMENTS (TAC NOS. M91671, M91672, M91673, and M91674)." None of the SGs meet the criteria for Category C-3 based on the 3.0 Volt Interim Plugging Criteria.
)
e s. , n . .
9511170015 951113 PDR O
ADOCK 05000456 PDR '
.u om,m o,mmor r'QVil
'< i November 13,1995 .
Page Two The enclosed summarizes the inspection results. Included is a description of the ,
investigations being performed to determine the cause of degradation and corrective !
actions to prevent recurrence.
Please direct any questions regarding this submittal to Doug Huston, Braidwood Licensing Supervisor, (815) 458-2801, extension 2511.
f Very truly yours,
, . Tulon !
tation Manager Braidwood Nuclear Station -
TJT/DH/dla BW/95-0110. doc
Enclosure:
Steam Generator C-3 Report Attachment cc: Senior Resident Inspector - Braidwood j Braidwood Project Manager, NRR Regional Administrator, Region III s
. I l
Braidwood Station Unit 1 Fifth Refuel Outage Steam Generator C-3 Report On October 7,1995, a Steam Generator (SG) Tube Inservice Inspection was initiated on Braidwood Unit 1 in accordance with Technical Specification Surveillance requirement i
(TSSR) 4.4.5.0.
An initial sample size of 100% of all available tubes was selected.
TSSR 4.4.5.2.c requires that the results of each sample inspection be classified into one of three categories. A SG will be classified in Category C-3 if more than 10% of the total l tubes inspected are degraded or more than 1% of the inspected tubes are defective. A SG tube is considered degraded ifit has an imperfection of greater than or equal to 20%
nominal tube wall thickness. A SG tube is considered defective ifit has an imperfection of greater than or equal to 40% nominal tube wall thickness.
The initial sample inspection resulted in the following SGs being classified into Category C-3 based on the following reasons:
lA On October 27,1995 at 22:00 hours, greater than 1% of the 4073 inservice tubes being defective.
IB On October 24,1995 at 16:55 hours, greater than 1% of the 4476 inservice tubes being defictive.
1C On October 29,1995 at 21:00 hours, greater than 1% of the 3872 inservice tubes being defective.
ID On October 29,1995 at 21:45 hours, greater than 1% of the 4213 inservice tubes being defective.
The exact number of tubes exceeding the 40% through wall limit is not known since the eddy current examination was performed assuming approval of a 3.0 Volt Interim Plugging Criteria Technical Specification amendment. Enough eddy current examinations were performed to verify the results met Category C-3. At the time of the examination, the only approved Technical Specification SG tube plugging limit was the 40% through wall limit. The 1.0 Volt Interim Plugging Criteria that was in effect for Braidwood Unit 1 Cycle 5 had expired. At the time of the SG eddy current examination, the 3.0 Volt Interim Plugging Criteria had not been approved by the NRC. The 3.0 Volt Interim Plugging Criteria was approved by the NRC on November 9,1995 in a letter from M. D. Lynch to D. L. Farrar, " ISSUANCE OF AMENDMENTS (TAC NOS. M91671, M91672, M91673 ;
AND M91674)." None of the SGs meet the criteria for Category C-3 based on the 3.0 i Volt Interim Plugging Criteria. Most of the defective tubes based on the 40% through !
l wall criteria are due to indications at the hot leg tube support plate regions.
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s l Attachment A provides, by SG, the number of tubes plugged this outage per the 3.0 Volt
, Interim Plugging Criteria as well as the number of tubes plugged in previous outages.
- This attachment also includes the reason why each tube was plugged during this outage.
Technical Specification 4.4.5.5.c requires results of SG tube inspections which fall into Category C-3 to be reponed in a Special Report to the Commission pursuant to 4 Specification 6.9.2 within 30 days and prior to resumption of plant operation. This report
- shall provide a description ofinvestigations conducted to determine the cause of the tube degradation and corrective measures to prevent recurrence.
- INVESTIGATION CONDUCTED TO DETERMINE THE CAUSE OF THE TUBE i DEGRADATION
! The SG tube eddy current inspection performed during the Unit I fifth refuel outage met j the requirements for the implementation of the 3.0 Volt Interim Plugging Criteria. The j requirements for the 3.0 Volt Interim Plugging Criteria calls for 100% bobbin coil probe l
examination of all hot leg tubes down to the lowest cold leg indication. The lowest cold j leg indication is determined by a minimum examination of 20% of the SG tubes full length.
j Rotating Pancake Coil (RPC) inspections were performed on all hot leg support plate indications greater than 3.0 volts and all cold leg support plate indications greater than 1.0 volt. In addition, a minimum of 20% of the hot leg indications between 1.0 and 3.0 volts j were inspected by RPC. The bobbin coil inspection resulted in 4136 indications being identified at the support plate regions. The RPC inspection verified that the support plate indications are primarily axially oriented outside diameter stress corrosion cracking (ODSCC) and that the indications are confined within the thickness of the SG tube support plates. In addition to the ODSCC at the support plate regions, axial and :
circumferential cracks were identified at the top-of-tubesheet roll transition region. These j top-of-tubesheet indications resulted in 30 tubes being removed from service. The top-of-tubesheet indications are also a result of ODSCC. Two tubes were removed from service due to wear greater than 40% through wall at the Anti-Vibration Bars.
l CORRECTIVE MEASURES TO PREVENT RECUTlENCE The dominate form of corrosion in the Braidwood Unit 1 SGs is ODSCC at the support plate regions. Braidwood Station implemented the following programs to mitigate the corrosive environment in the tube support plate region which leads to ODSCC:
Industry Guidelines Compliance with the EPRI Secondary Chemistry Guidelines, Revision 3.
SG Tube Crevice Fouling
- Maintain hotwell dissolved oxygen concentrations <3 ppb
, Use of advances amines, such as ethanolamine (ETA), for secondary pH control i SG Crevice pH
- Evaluation of SG hideout return data during shutdown to assess the impact of operating chemistry on SG crevice chemistry, and potential formation of caustic crevices which can cause Tube Suppoit Plate ODSCC.
- The molar ratio control program begun at the start of Cycle 4 will be maintained.
This program adjusts the sodium to chloride ratio in the SG by adding ammonium chloride to the condensate system.
SG Sodium Reduction
- Installed a reverse osmosis unit in the makeup water system to reduce sodium input to the secondary side.
- Performed 100% eddy current inspection on the four condenser water boxes over the last three refuel outages.
SG Electrochemical Potential (ECP) Reduction
- Continue use of high hydrazine concentrations for maintaining reducing conditions in the SGs and passivation of piping systems and components.
- Braidwood does not have any copper components in its feedwater or condensate systems.
Currently, Braidwood Station, in conjunction with our Corporate Chemistry Support Organization, is pursuing additional methods to further enhance our SG corrosion control program. They are as follows:
The addition of other amines either with ETA or in place of ETA will be evaluated to optimize the pH contiof and minimize iron transport.
- Chemistries are being evaluated to improve iron transport out of the SG. The goal is to increase the efficiency ofiron removal via the SG blowdown system.
During Cycle 5, Braidwood Unit 1 implemented a Secondary Side Boric Acid program as a measure to reduce the corrosive environment in the SG tube support plate region which leads to ODSCC, thereby lengthening the life of the SGs. Since this time, Comed has decided to replace the SGs in Braidwood Unit 1. The SG replacemer.t is scheduled for the seventh refuel outage in the Fall of 1998. The overall Unit 1 Cycle 5 voltage growth rate of the support plate indications was greater than the voltage growth rate from Unit 1 Cycle 4. The Secondary Side Boric Acid program was not in effect during Unit 1 Cycle 4.
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- - - . - . . . _ _ - _ _ .. - . = - _ . . ~ _ . . . - - . - _ . . . . .--
Since the Secondary Side Boric Acid program was expensive to perform and did not stop
- the formation of ODSCC or reduce the voltage growth rate, and since the SGs will be replaced in the near future, the Secondary Side Boric Acid program will not be continued for Braidwood Unit 1 Cycle 6.
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1 Attachment A Braidwood Unit 1 Fifth Refuel Outage (A1R05) SG Tube Plugging Results 1 A SG 1BSG 1C SG 1D SG TOTALS Total Tubes 4578 4578 4578 4578 18312 Previously Plugged Tubes 505 102 706 365 1678 Total Tubes inspected This l 2
Outage 4073 4476 3872 4213 16634 A1R05 Tube Support Plate i i Pluggable 1 0 0 0 1 l Anti-Vibration Bar Wear
, Pluggable 0 1 1 0 2 Confirmed Wedge Location Pluggable Indications 10 0 1 3 14 i Top-of Tubesheet Pluggable j Indications (Circ / Axial / Mixed Mode) 8/1/0 2/0/1 8/1/1 5/3/0 23/5/2 Tubes Plugged due to 1 AVB 1 TSP VOL Administrative Reasons 2 Loose Parts 1AVB 2 Dents 0 7 Tubes Plugged due to TSP 4 Locking to Support the 3.0 Volt 4
IPC 21 21 22 21 85 l A1R05 Total Tubes Plugged 44 26 37 32 139 Restart Total Tubes Available 4029 4450 3835 4181 16495 Total Tubes Plugged 549 128 743 397 1817 Percentage of Tubes Plugged 12.0 2.8 16.2 8.7 9.9 SG Tube Pluggn;; Limits are a maximum of 30% in any one SG with a maximum of 24% total.
