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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20217M2871999-10-21021 October 1999 Refers to Rev 5 Submitted in May 1999 for Portions of Byron Nuclear Power Station Generating Stations Emergency Plan Site Annex.Informs That NRC Approval Not Required Based on Determination That Plan Effectiveness Not Decreased ML20217P6171999-10-21021 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 ML20217F7891999-10-0808 October 1999 Forwards Insp Repts 50-454/99-12 & 50-455/99-12 on 990803- 0916.One Violation Occurred Being Treated as NCV ML20217B6351999-10-0505 October 1999 Forwards for Info,Final Accident Sequence Precursor Analysis of Operational Event at Byron Station,Unit 1,reported in LER 454/98-018 & NRC Responses to Util Specific Comments Provided in ML20212L1791999-10-0505 October 1999 Informs That as Result of Staff Review of Util Responses to GL 92-01,rev 1,suppl 1 & Suppl 1 Rai,Staff Revised Info in Rvid & Is Releasing Rvid Version 2 ML20217B2991999-10-0101 October 1999 Forwards Insp Repts 50-454/99-16 & 50-455/99-16 on 990907-10.No Violations Noted.Water Chemisty Program Was Well Implemented,Resulted in Effective Control of Plant Water Chemistry 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 ML20212J6751999-09-30030 September 1999 Forwards Replacement Pages Eight Through Eleven of Insp Repts 50-454/99-15 & 50-455/99-15.Several Inaccuracies with Docket Numbers & Tracking Numbers Occurred in Repts ML20217A5821999-09-29029 September 1999 Advises of NRC Plans for Future Insp Activities at Facility for Licensee to Have Opportunity to Prepare for Insps & to Provide NRC with Feedback on Any Planned Insps Which May Conflict with Plant Activities 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 ML20216F8051999-09-17017 September 1999 Forwards Insp Rept 50-454/99-14 & 50-455/99-14 on 990823-27. Security Program Was Effectively Implemented in Areas Inspected.No Violations Were Identified 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 ML20211P1841999-09-0808 September 1999 Forwards Insp Repts 50-454/99-15 & 50-455/99-15 on 990824- 26.No Violations Noted.Objective of Insp to Determine Whether Byron Nuclear Generating Station Emergency Plan Adequate & If Emergency Plan Properly Implemented ML20211Q6821999-09-0606 September 1999 Informs That NRC Tentatively Scheduled Initial Licensing Exam for Byron Operator Licesne Applicants During Wks of 000619 & 26.Validation of Exam Will Occur at Station During Wk of 000529 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 ML20211N5151999-09-0303 September 1999 Ack Receipt of Re Safety Culture & Overtime Practices at Byron Nuclear Power Station.Copy of Recent Ltr from NRC to Commonwealth Edison Re Overtime Practices & Safety Culture Being Provided ML20211M1371999-09-0202 September 1999 Discusses 990527 Meeting with Ceco & Byron Station Mgt Re Overtime Practices & Conduciveness of Work Environ to Raising Safety Concerns at Byron Station.Insp Rept Assigned for NRC Tracking Purposes.No Insp Rept Encl 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 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 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) ML20211G4021999-08-25025 August 1999 Forwards Insp Repts 50-454/99-10 & 50-455/99-10 on 990622-0802.No Violations Noted 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 05000454/LER-1998-008, Informs That Licensee Determined That Suppl Rept to LER 98-008 Is Not Warranted.No Addl Info Was Generated Following Completion of Root Cause Investigation of Following Completion of Corrective Actions Stated in Original LER1999-08-12012 August 1999 Informs That Licensee Determined That Suppl Rept to LER 98-008 Is Not Warranted.No Addl Info Was Generated Following Completion of Root Cause Investigation of Following Completion of Corrective Actions Stated in Original LER 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 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 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 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 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 ML20210E2151999-07-23023 July 1999 Forwards Byron Unit 1 B1R09 ISI Summary Rept Spring 1999 Outage,980309-990424, in Compliance with Requirements of Article IWA-6000, Records & Repts of Section XI of ASME & P&PV,1989 Edition 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 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 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) ML20210A3151999-07-16016 July 1999 Forwards Insp Repts 50-454/99-08 & 50-455/99-08 on 990511-0621.Three Violations Being Treated as Noncited Violations 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 1999-09-08
[Table view] Category:NRC TO UTILITY
MONTHYEARML20062F5931990-11-19019 November 1990 Forwards Safety Insp Repts 50-456/90-18 & 50-457/90-20 on 900817-1030.No Violations Noted ML20217A1551990-11-14014 November 1990 Forwards Safety Insp Rept 50-455/90-22 on 901002-1107. Violations Noted ML20217A4431990-11-14014 November 1990 Forwards Safety Insp Rept 50-455/90-21 on 900910-11,24-26 & 1107.No Violations Noted ML20058G3241990-11-0505 November 1990 Forwards Page 9 of Insp Repts 50-454/90-16 & 50-455/90-15. Page Erroneously Deleted from Original Rept ML20058E7141990-10-30030 October 1990 Forwards Exam Forms & Answer Keys,Grading Results & Individual Answer Sheets for Each Applicant ML20058E7071990-10-30030 October 1990 Ack Receipt of 901015 Response to Violations Re Employee Protection at Plant Sites ML20058B9531990-10-23023 October 1990 Forwards Insp Rept 50-456/90-20 on 901004-06.No Violation Noted.Nrc Plans to Meet W/Licensee to Discuss Corrective Actions.Licensee Should Prepare to Discuss Act of Conducting Multiple Surveillances on Sys W/High/Low Pressure Interface ML20059N7001990-10-0505 October 1990 Forwards Safety Insp Repts 50-456/90-16 & 50-457/90-16 on 900729-0915.Noncited Violations Noted ML20059M2101990-09-25025 September 1990 Forwards Info Re Generic Fundamentals Exam Section of Operator Licensing Written Exams to Be Administered on 901010,including Map of Area Where Exams Will Be Taken, Preliminary Instructions for Exam & Equation Sheet ML20059L3051990-09-14014 September 1990 Forwards SER Re Util 900706 Request for Relief Concerning Inservice Testing Program.Relief Granted from Testing Requirements Which Would Impose Undue Hardship If Immediate Compliance Was Imposed ML20059L4531990-09-14014 September 1990 Forwards Suppl to SER Re Results of Inservice Testing Program Changes Based on Review of 881221 & 890203 Submittals.Changes Acceptable ML20059M1511990-09-14014 September 1990 Discusses Investigation Rept 3-85-018S from Investigation Conducted from 851107-880422 & 881101-900416 & Forwards Notice of Violation ML20059E1141990-08-30030 August 1990 Forwards Safety Insp Repts 50-454/90-16 & 50-455/90-15 on 900814-17.No Violations Noted IR 05000295/19900131990-08-24024 August 1990 Forwards Notices of Violations from Insp Repts 50-456/90-13, 50-457/90-16,50-295/90-13 & 50-304/90-15 Inadvertently Removed from Rept Package Due to Administrative Error ML20059B4271990-08-17017 August 1990 Forwards Safety Insp Repts 50-454/90-17 & 50-455/90-16 on 900701-0811.No Violations Noted ML20059B3531990-08-17017 August 1990 Forwards Safety Insp Repts 50-456/90-13 & 50-457/90-16 on 900617-0728 & Notice of Violation.Licensee Appears to Have Weakness in Overall Mgt Control of non-routine Tech Spec Surveillance Activities ML20059A2401990-08-14014 August 1990 Advises That Operator & Senior Operator Licensing Exams Scheduled for Wk of 901203.Preliminary License Applications Should Be Submitted at Least 30 Days Before First Exam Dates in Order to Review Training & Experience of Candidates ML20058M6141990-08-0707 August 1990 Forwards Sample Registration Ltr for 901010 Generic Fundamentals Section of Written Operator Licensing Exam. Registration Ltr Listing Names of Candidates Taking Exam Should Be Submitted to Region 30 Days Prior to Exam Date ML20058L9911990-08-0606 August 1990 Forwards SERs of Responses & Associated Science Application Intl Corp 900614 Technical Evaluation Rept SAIC-89/1640 Re Station Blackout.Revised Response Addressing Areas of Nonconformance Should Be Submitted within 60 Days ML20056A4981990-08-0101 August 1990 Forwards Master Bwr/Pwr Generic Fundamentals Exam Section W/Answer Key.W/O Encls ML20058L7241990-07-31031 July 1990 Discusses Potential Safety Issues Contained in Deposition Transcripts Provided by Util Attys Re Concerns Identified by Former Employee Including Quality of Welds at Facility, Welder certifications,N-5 Data Packages & Related Matters ML20055J1551990-07-24024 July 1990 Forwards Safeguards Insp Repts 50-456/90-15 & 50-457/90-18 on 900621-27.No Violations Noted ML20055J1521990-07-20020 July 1990 Forwards Final SALP Repts 50-454/90-01 & 50-455/90-01 for Nov 1989 - Mar 1990 ML20055G6661990-07-18018 July 1990 Confirms 900802 Enforcement Conference in Region III Ofc to Discuss Ofc of Investigations & Regional Findings Re Lack of Control of Operability Determinations Involving Emergency Diesel Generators at Plant.Listed Items to Be Discussed ML20055G4161990-07-18018 July 1990 Forwards Safety Insp Repts 50-456/90-12 & 50-457/90-15 on 900429-0616 & Notice of Violation ML20055G3301990-07-17017 July 1990 Forwards Safety Insp Repts 50-454/90-14 & 50-455/90-13 on 900513-0630.No Violations Noted ML20055E2171990-07-0202 July 1990 Forwards Requalification Exam Rept 50-454/OL-90-01 for Units 1 & 2 Administered During Wks of 900528 & 0604.Requests Response to Issue of Training & Evaluating Operators on Uncontrolled Depressurization of Steam Generators ML20055E2411990-06-29029 June 1990 Forwards Synopsis of NRC Investigation Rept 03-85-18S. Licensee Will Be Notified of NRC Decision Re Enforcement Action Based on Findings Concerning Violations ML20055E0691990-06-29029 June 1990 Forwards Synopsis of NRC Investigation Rept 03-87-011 Re Investigation Performed at Facility,For Info ML20055D0251990-06-28028 June 1990 Forwards Safety Insp Repts 50-454/90-15 & 50-455/90-14 on 900611-14.No Violations Noted ML20055D1341990-06-28028 June 1990 Forwards Safety Insp Repts 50-456/90-14 & 50-457/90-17 on 900618-22.No Violations Noted ML20055E8791990-06-27027 June 1990 Forwards Notice of Withdrawal of 880302 Application for Amend to Change Tech Spec 4.6.1.6.1.d,to Reduce Containment Tendon Design Stresses to Incorporate Addl Design Margin Not Reflected in Values Currently in Tech Specs,Per ML20055C7541990-06-15015 June 1990 Forwards Maint Team Insp Repts 50-456/90-08 & 50-457/90-08 on 900416-20 & 0430-0504 & Notice of Violation.Overall Insp Concluded That Implementation of Maint Program Adequate ML20059M8791990-06-13013 June 1990 Forwards NRC Performance Indicators for First Quarter 1990. W/O Encl ML20055C6341990-05-23023 May 1990 Advises That Revised Schedule to Perform Blackness Testing within 2 Yrs of Placing Racks in Svc & Every 5 Yrs Thereafter,Acceptable ML20055C6191990-05-17017 May 1990 Forwards Safety Insp Repts 50-456/90-10 & 50-457/90-11 on 900318-0428 & Notice of Violation ML20055C5731990-05-16016 May 1990 Ack Receipt of 900430 Response to Allegation RIII-90-A-0011 Re Employee Fitness for Duty.Confirms That Results of fitness-for-duty Test Negative & Allegation Unsubstantiated ML20055C3921990-02-26026 February 1990 Approves Util 900214 Request for Use of B&W Steam Generator Plugs W/Alloy 690 as Alternative to Alloy 600.Alternate Matl Is nickel-base Alloy (ASME Designation SB-166) ML20247R8411989-09-26026 September 1989 Forwards Safety Insp Repts 50-456/89-22 & 50-457/89-22 on 890730-0916 & Notice of Violation.Requests That Util Provide Description of Mgt Actions to Assure Proper & Timely Notifications in Future ML20248D4981989-09-26026 September 1989 Accepts Scope & Objectives for Annual Emergency Preparedness Exercise Scheduled for 891206 & 07,submitted by ML20248G9731989-09-20020 September 1989 Forwards Unexecuted Amend 13 to Indemnity Agreement B-69, Reflecting Increase in Primary Layer of Nuclear Energy Liability Insurance Provided by ANI & Maelu ML20247H6411989-09-12012 September 1989 Advises That 890816 Revisions to ATWS Mitigation Sys Acceptable W/Requirements of 10CFR50.62(c)(1) ML20247H8291989-09-12012 September 1989 Forwards Safety Insp Repts 50-456/89-24 & 50-457/89-24 on 890703-0901 & Notice of Violation.Particular Concern Re Violation 2 in Which Several Layers of Oversight Failed to Identify Recorded Survey Which Exceeded Stated Limit Noted ML20247K2231989-09-11011 September 1989 Forwards Amends 123 & 41 to Licenses DPR-61 & NPF-49, Respectively & Safety Evaluation.Amends Change Tech Specs 4.10.1.D.1.h & 4.4.5.4.a.8 to Allow Insp of Steam Generator Tubes by Insertion of Ultrasonic Test Probe 1990-09-25
[Table view] Category:OUTGOING CORRESPONDENCE
MONTHYEARML20217M2871999-10-21021 October 1999 Refers to Rev 5 Submitted in May 1999 for Portions of Byron Nuclear Power Station Generating Stations Emergency Plan Site Annex.Informs That NRC Approval Not Required Based on Determination That Plan Effectiveness Not Decreased 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 ML20217F7891999-10-0808 October 1999 Forwards Insp Repts 50-454/99-12 & 50-455/99-12 on 990803- 0916.One Violation Occurred Being Treated as NCV ML20217B6351999-10-0505 October 1999 Forwards for Info,Final Accident Sequence Precursor Analysis of Operational Event at Byron Station,Unit 1,reported in LER 454/98-018 & NRC Responses to Util Specific Comments Provided in ML20212L1791999-10-0505 October 1999 Informs That as Result of Staff Review of Util Responses to GL 92-01,rev 1,suppl 1 & Suppl 1 Rai,Staff Revised Info in Rvid & Is Releasing Rvid Version 2 ML20217B2991999-10-0101 October 1999 Forwards Insp Repts 50-454/99-16 & 50-455/99-16 on 990907-10.No Violations Noted.Water Chemisty Program Was Well Implemented,Resulted in Effective Control of Plant Water Chemistry ML20212J6751999-09-30030 September 1999 Forwards Replacement Pages Eight Through Eleven of Insp Repts 50-454/99-15 & 50-455/99-15.Several Inaccuracies with Docket Numbers & Tracking Numbers Occurred in Repts ML20217A5821999-09-29029 September 1999 Advises of NRC Plans for Future Insp Activities at Facility for Licensee to Have Opportunity to Prepare for Insps & to Provide NRC with Feedback on Any Planned Insps Which May Conflict with Plant Activities 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 ML20216F8051999-09-17017 September 1999 Forwards Insp Rept 50-454/99-14 & 50-455/99-14 on 990823-27. Security Program Was Effectively Implemented in Areas Inspected.No Violations Were Identified 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 ML20211P1841999-09-0808 September 1999 Forwards Insp Repts 50-454/99-15 & 50-455/99-15 on 990824- 26.No Violations Noted.Objective of Insp to Determine Whether Byron Nuclear Generating Station Emergency Plan Adequate & If Emergency Plan Properly Implemented 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 ML20211Q6821999-09-0606 September 1999 Informs That NRC Tentatively Scheduled Initial Licensing Exam for Byron Operator Licesne Applicants During Wks of 000619 & 26.Validation of Exam Will Occur at Station During Wk of 000529 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 ML20211N5151999-09-0303 September 1999 Ack Receipt of Re Safety Culture & Overtime Practices at Byron Nuclear Power Station.Copy of Recent Ltr from NRC to Commonwealth Edison Re Overtime Practices & Safety Culture Being Provided 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 ML20211M1371999-09-0202 September 1999 Discusses 990527 Meeting with Ceco & Byron Station Mgt Re Overtime Practices & Conduciveness of Work Environ to Raising Safety Concerns at Byron Station.Insp Rept Assigned for NRC Tracking Purposes.No Insp Rept Encl 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 ML20211G4021999-08-25025 August 1999 Forwards Insp Repts 50-454/99-10 & 50-455/99-10 on 990622-0802.No Violations Noted 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 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 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 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 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 ML20210A3151999-07-16016 July 1999 Forwards Insp Repts 50-454/99-08 & 50-455/99-08 on 990511-0621.Three Violations Being Treated as Noncited Violations 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) 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 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 ML20196K0161999-06-30030 June 1999 Discusses 990622 Meeting at Byron Nuclear Power Station in Byron,Il.Purpose of Visit Was to Meet with PRA Staff to Discuss Ceco Initiatives in Risk Area & to Establish Dialog Between SRAs & PRA Staff 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 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 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 ML20207G0601999-06-0707 June 1999 Provides Updated Info Re Number of Failures Associated with Initial Operator License Exam Administered from 980914-0918. NRC Will Review Progress Wrt Corrective Actions During Future Insps ML20207G0421999-06-0404 June 1999 Forwards Insp Repts 50-454/99-04 & 50-455/99-04 on 990330-0510.Violations Identified & Being Treated as non-cited Violations ML20207E5451999-05-28028 May 1999 Forwards Insp Repts 50-454/99-07 & 50-455/99-07 on 990517-20.No Violations Noted.Fire Protection Program Was Effective ML20207B6361999-05-25025 May 1999 Forwards SE Accepting Revised SG Tube Rupture (SGTR) Analysis for Bryon & Braidwood Stations.Revised Analysis Was Submitted to Support SG Replacement at Unit 1 of Each Station ML20207A5891999-05-20020 May 1999 Forwards Insp Repts 50-456/99-05 & 50-457/99-05 on 990405-23.Two non-cited Violations Identified ML20206U3471999-05-20020 May 1999 Forwards Insp Rept 50-454/99-05 on 990401-22.No Violations Noted.Insp Reviewed Activities Associated with ISI Efforts Including Selective Exam of SG Maint & Exam Records, Calculations,Observation of Exam Performance & Interviews ML20207A2151999-05-19019 May 1999 Forwards Insp Repts 50-454/99-06 & 50-455/99-06 on 990419-23.No Violations Noted.Insp Consisted of Review of Liquid & Gaseous Effluent Program,Radiological Environmental Monitoring Program,Auditing Program & Outage Activities ML20206U4641999-05-18018 May 1999 Responds to Util 990517 Request That NRC Exercise Discretion Not to Enforce Compliance with Actions Required in TS 3.0.3. Documents 990516 Telcon with Licensee Re NOED ML20207B8751999-05-18018 May 1999 Responds to Ltr Dtd 990225,expressing Concerns That Low Staffing Levels & Excessive Staff Overtime May Present Serious Safety Hazards at Some Commercial Nuclear Power Plants in Us ML20206N4791999-05-13013 May 1999 Forwards RAI Re 980529 Amend Request for Byron & Braidwood to Credit Automatic PORV Operation for Mitigation of Inadvertent SI at Power Accident.Response Requested 60 Days After Receipt Date ML20206Q5321999-05-11011 May 1999 Forwards Insp Repts 50-456/99-06 & 50-457/99-06 on 990302-0413.Configuration Control Error Resulted in Isolation of Unit 1 Emergency Boration Flow Path Through Designated Boric Acid Pump for Period of 3 H Occurred ML20206H8161999-05-0505 May 1999 Confirms Discussion Re Meeting to Be Conducted on 990527 at Braidwood Station Training Building.Meeting Will Discuss Braidwood Station Performance as Described in Most Recent Plant Performance Review 1999-09-08
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-. .- -.
. MAY 2 41985
, Docket Nos.: STN 50-_454/STN 50-455 STN 50-456/STN 50-457-Mr. Dennis L. Farrar Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. Farrar:
Subject:
TMI Action Item II.K.3.30 - Byron /Braidwood On May 21 1985, the NRC approved the new Westinghouse small break LOCA model, NOTRUMP, for use in satisfying the TMI Action Item II.K.3.30. The Westing-house model was documented in the two Topical Reports, WCAP-10079 and WCAP-10054. The Westinghouse Owners Group (WOG) references NOTRUMP as their new licensing small break LOCA model to satisfy the requirements of TMI Action Item II.K.3.30. Our Safety Evaluation of II.K.3.30 for the members of WOG is enclosed.
It is our understanding that you are a member of the WOG and that NOTRUMP is to be used in the -small break LOCA analysis for Byron /Braidwood. If this is correct, this completes the TMI Action Item II.K.3.30 for your plant and in accordance with the TMI Action Item II.K.3.31, your plants specific analysis is due within one year of receipt of this letter. Please advise this office within 60 days if this is not correct and provide your plans and schedule for completing II.K.3.30 and II.K.3.31.
On November 2, 1983 in Generic Letter No. 83-35, the NRC provided clarifica-tion and proposed a generic resolution of TMI Action Item II.K.3.31. That is, resolution of II.K.3.31 may be accomplished by generic analysis to demon-strate that the previous analyses performed with WFLASH were conservative.
Future plant specific analysis performed for your plants by Westinghouse for reloads or Technical Specification amendments (those beyond 90 days of the date of this letter) should be calculated with the new code, NOTRUMP.
Sincerely.
B. J. You'ngblood, Chief Licensing Branch No. 1 Division of Licensing
Enclosure:
As stated DISTRIBUTION:
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' UNITED STATES g . NUCLEAR REGULATORY COMMISSION WASMNGTON, D. C. 20555
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. Docket Nos.: STN 50-454/STN 50-455 STN 50-456/STN 50-457 Mr. Dennis L. Farrar Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. Farrar:
Subject:
TMI Action Item II.K.3.30'- Byron /Braidwood On May 21 1985, the NRC approved the new Westinghouse small' break LOCA model, NOTRUMP. for use in satisfying the TMI Action Item II.K.3.30. The Westing-house model was documented in the two Topical Reports, WCAP-10079 and WCAP-10054. The Westinghouse Owners Group (WOG) references NOTRUMP as their new licensing small break LOCA model to satisfy the requirements of TMI Action -
Item'II.K.3.30. Our Safety Evaluation of'II.K.3.30 for the members of WOG is enclosed.
It is our understanding that you are a member of the WOG and that NOTRUMP is to be used in the small break LOCA analysis for Byron /Braidwood. If this is correct, this completes the TMI Action Item II.K.3.30 for your plants and in
- accordance with the TMI Action Item II.K.3.31, your plant specific analysis is due within one year of receipt of this letter. Please advise this office within 60 days if this is not correct and provide your plans and schedule for completing II.K.3.30 and II.K.3.31.
On November 2, 1983 in Generic Letter No. 83-35, the NRC provided clarifica-tion'and proposed a generic resolution of TMI Action Item II.K.3.31. That is, resolution of II.K.3.31 may be accomplished by generic analysis,to demon-strate that the previous analyses performed with WFLASH were conservative.
Future plant specific analysis performed for your plants by Westinghouse for reloads or Technical Specification amendments (those beyond 90 days of the date of this letter) should be calculated with the new code, NOTRUMP.
Sincerely, O. NL or B. J. Youngblood, Chief '
Licensing Branch No. 1
Enclosure:
As stated cc: See next page
MD 2 41985 s_ BYRON /BRAIDWOOD Mr. Dennis L. Farrar Director of Nuclear Licensing Commonwealth Edison Company -
Post Office Box 767 Chicago, Illinois 60690 cc: Mr. William Kortier Dr. Bruce von Zellen Atomic Power Distribution Department of Biological Sciences Westinghouse Electric Corporation Northern Illinois University Post Office Box 355 -
DeKalb, Illinois 61107 Pittsburgh, Pennsylvania 15230 Mr. Julian Hinds Joseph Gallo, Esq. U. S. Nuclear Regulatory Commission Isham, Lincoln & Beale Byron / Resident Inspectors Office 1120 Connecticut Ave.c N. W. 4448 German Church Road Suite 840 Byron, Illinois 61010 Washington, D. C. 20036 Ms. Diane Chavez C. Allen Bock, Esquire 528 Gregory Street Post Office Box 342 Rockford, Illinois 61108 Urbana, Illinois 61801 Mrs. Phillip B. Johnson Thomas J. Gordon, Esquire 1907 Stratford Lane Waaler, Evans & Gordon Rockford, Illinois 61107 2503 S. Neil Champaign, Illinois 61820 Douglass Cassel, Esq.
109 N. Dearborn Street Ms. Bridget Little Rorem Suite 1300 Appleseed Coordinator Chicago, Illinois 60602 117 North Linden Street Essex, Illinois 60935 Ms. Pat Morrison 5568 Thunderidge Drive Mr. Edward R. Crass Rockford, Illinois 61107 Nuclear Safeguards and Licensing Division David C. Thomas, Esq.
Sargent & Lundy Engineers 77 S. Wacker Drive 55 East Monroe Street Chicago, Illinois 60601 Chicago, Illinois 60603 Rebecca J. Lauer, Esq.
U. S. Nuclear Regulatory Commission Isham, Lincoln & Beale Resident Inspectors Office Three First National Plaza RR#1, Box 79 Suite 5200 Braceville, Illinois 60407 Chicago, Illinois 60602
BYRON /BRAIDWOOD cc: Regional Administrator U. S. NRC, Region III-799 Roosevelt Road Glen Ellyn, Illinois 60137 Erie Jones, Director Illinois Emergency Services
- and Disaster Agency 110 East Adams Springfield, Illinois 62705 M's. Lorraine Creek Rt. 1, Box 182 Manteno.. Illinois 60950 Mr. Michael C. Parker, Chief '
Division of Engineering Illinois Department of Nuclear Safety 1035 Outer Park Drive
. Springfield, Illinois 62704 Michael Miller Isham, Lincoln & Beale One First National Plaza
-42nd Floor-Chicago, Illinois 60603 Jane M. Whicher, Esq.
109 N. Dearborn Street Chicago, Illinois 60602
- m. __ - -
Enc 1bsure SAFETY EVALUATION TMI ACTION ITEM II.K.3.30 FOR WESTINGHOUSE' PLANTS NUREG-0737 is a report transmitted by a letter from D. G. Eisenhut, Director of the Division of Licensing, NRR, to licensees of operating power
. reactors and applicants for operating reactor licenses forwarding TMI Action Plan requirements which have been approved by the Commission for implementa-tion.Section II.K.3.30 of Enclosure 3 to NUREG-0737 outlines the Commission requirements for the industry to demonstrate its small break loss of coolant accident (SBLOCA) methods continue to comply with the requirements of Appendix K to 10 CFR Part 50.
The technical issues to be addressed were outlined in NUREG-0611, " Generic Evaluation of Feedwater Transients and Small Break Loss-of-Coolant Accidents in Westinghouse-Designed Operating Plants." In addition to the concerns' listed in NUREG-0611, the staff requested licensees with U-tube steam generators to assess their computer codes with the Semiscale S-UT-08 experimental results.
This request was made to validate the code's ability to calculate the core coolant level depression as influenced by the steam generators prior to loop seal clearing.
~ In response to TMI Action Item II.K.3.30, the Westinghouse Owners Group (WOG) has elected to reference the Westinghoue NOTRUMP code as their new licensing small break LOCA model. Referencing the new computer code did not imply deficiencies in WFLASH to meet the Appendix K requirements. The decision
.was based on desires of the industry to perform licensing evaluatio'ns with a ,
computer program specifically designed to calculate small break LOCAs with ,
greater phenomenological accuracy than capable by WFLASH. ,
1
The following documents our evaluation of the WOG response to TMI Action Item II.K.3.30 confirmatory items.
II.
SUMMARY
OF REQUIREMENTS NUREG-0611 required licensees and applicants with Westinghouse NSSS designs to address the following concerns:
A. Provide confirmatory validation of the small break LOCA model to adequately calculate the core heat transfer and two phase coolant level during core uncovery conditions.
B. Validate the adequacy of modeling the primary side of the steam generators as a homogeneous mixture.
C. Validate the condensation heat transfer model and affects of non- '
condensible gases.
l D. Demonstrate, through noding studies, the adequacy of the SBLOCA model to calculate flashing during system depressurization.
E. Validate the. polytropic expansion coefficient applied in the accumu-lator model, and
! F. Validate the SBLOCA model with LOFT tests L3-1 and L3-7. In addition, validate the model with the Semiscale S-UT-08 experimental data.
- Detailed responses to the above items are documented in WCAP-10054, l
! " Westinghouse Small Break ECCS Evaluation Model Using the NOTRUMP Code."
III. EVALUATION The following is the staff's evaluation of the TMI Action Iten require-ments outlined above.
l i
I i
2
A. Core Heat Transfer Models The Westinghouse Owners Group (WOG) referenced the NOTRUMP computer code as their new computer program for small break loss of coolant accident (SBLOCA) evaluation. NOTRUMP was benchmarked against core uncovery experiments conducted at the Oak Ridge National Laboratory (ORNL). These tests were performed under NRC sponsorship. The good agreement between the calculations and the data confirmed the adequacy of the drift flux model used for core hydraulics as well as the core heat transfer models of clad temperature predictions.
t The staff finds the core thermal-hydraulic models in NOTRUMP accept-able. This item is resolved.
B. Steam Generator Mixture Level Model NUREG-0611 requested licensees and applicants with Westinghouse designed NSSSs to justify the adequacy of modeling the primary system ;
of the steam generators as a homogeneous . mixture. This question was i directed to the WFLASH code. NOTRUMP, the new SBLOCA licensing code models phase separation and incorporates flow regime maps within the steam generator tubes. The adequacy of this model was demonstrated through benchmark analyses with integral experiments, in particular i with Semiscale test S-UT-08.
. b The staff finds the steam generator model in NOTRUMP acceptable.
This item is resolved.
C. Noncondensible Affects On Condensation Heat Transfer -
NUREG-0611 requested validation of the condensation heat transfer 8 I
correlations in the Westinghouse SBLOCA model and an assessment of 3
.m., _ . - -
the consequences of noncondensible gases in the primary coolant.
The condensation heat transfer model used in NOTRUMP is based on
, steam experiments performed by Westinghouse on a 16-tube PWR steam generator model. For two phase conditions,"an empirical correlation developed by Shah is applied.
l The staff finds the condensation heat transfer correlation in NOTRUMP acceptable.
, The influences of noncondensible gases on the condensation heat transfer was demonstrated by degrading the heat transfer coefficient in the steam generators. The heat transfer degradation was calculated using a boundary layer approach. For this calculation, the noncon-
, densible gases generated within the primary coolant system were col-
~
1ected and deposited on the surface of the steam generator tubes.
The sources of noncondensibles considered were:
(i) Air dissolved in.the RWST.
(ii) Hydrogen dissolved in the primary system.
(iii) Hydrogen in the pressurizer vapor space.
(iv) Radiolytic decomposition of water, t
With a degradation factor on the heat transfer coefficient, the-limiting SBLOCA was reanalyzed for a typical PWR. The WOG, thereby, concluded that formation of noncondensible gases in quantities that may reasonably be expected for a 4-inch cold leg break LOCA presents no serious detriment on the PWR system response in terms of core uncovery or system pressure. What perturbation was observed was minor in nature.
-The staff finds acceptable the Westinghouse submittal on the influences of noncondensible gases on design bases SBLOCA events.
{urconclusion is based on the limited amount of noncondensible gases available dur-ing a design basis SBLOCA event, as well as results obtained from Semi-
' scale experiments which reached similar conclusions while injecting noncondensible gases in excess amount expected during a SBLOCA design basis event. This item is resolved.
4
D. Nodalization Studies For Flashing During Depressurization As a consequence of the staff's experience with modeling SBLOCA
. events with NRC developed computer codes (in particular the TMI-2 accident), the staff questioned the adequacy of the nodalization in the licensing model to calculate the depressurization of the primary system. The staff therefore requested validation of the Westinghouse Evaluation Model to properly calculate the depressurization expected
-during a SBLOCA event.
Through nodalization studies and validation of the NOTRUMP licensing model with integral experiments (e.g... LOFT and Semiscale), Westing-house demcnstrated the acceptability of the nodalization and nonequi-librium models.
The staff finds the Westinghouse model acceptable for calculating depressurization during SBLOCA events. This item is resolved.
E. Accumulator Model 4
WFLASH, the previous Westinghouse small break loss of coolant accident (SBLOCA) analysis. code, applied a polytropic gas expansion coefficient of 1.4 to the nitrogen in the accumulators. The WOG was requested to validate this accumulator model in light of data obtained through the LOFT experimental programs for SBLOCAs. Westinghouse reviewed the
- applicable LOFT data and determined the need to perform full scale accumulator tests. Based upon these tests, Westinghouse modified the ,)
polytropic expansion coefficient to a more realistic value. Of inter-est is Westinghouse's conclusion that the selection of either a high ,
or low expansion coefficient had negligibl,e effect on the calculated peak clad temperature (PCT). This insensitivity is only; appropriate to NOTRUMP, with its nonequilibrium assumptions.
The staff finds acceptable the polytropic expansion coefficient in the NOTRUMP code. This item is resolved.
5
F. Code Validation Following the Taree Mile Island event of 1979, staff analyses with NRC developed computer codes led to concerns that d'etailed nodali-
~
zation was required.to simulate realistic systems responses to postu-lated SBLOCAs. As a consequence, licensees and applicants with Westing-house plants were requested to validate their licensing tools with integral experiments. In specific, the NRC requested that the computer
, codes be validated with the LOFT L3-1 and L3-7 experimental data. In addition, the staff also requested that the code be benchmarked with the Semiscale S-UT-08 experimental data. -
Westinghouse performed the above benchmark analyses. For the LOFT tests, Westinghouse showed good agreement between the NOTRUMP calcu-lations and the experimental data. For the S-UT-08 test, Westinghouse demonstrated that NOTRUMP did a reasonable job calculating the experi-mental data. However, this required a more detailed nodalization of the steam generators then used in the licensing model. With the less detailed licensing nodalization, the pre-loop-seal-clearing core level depression phenomenon, as ~ observed in the S-UT-08 data, was not con-servatively calculated for very small breaks. However, the calculated peak clad temperature was demonstrated to be higher (more conservative) with the coarse nodalization. The staff, therefore, finds acceptable the NOTRUMP computer code and the associated nodalization for SBLOCA design basis evaluation.
This item is resolved.
IV. CONCLUSION TheWestinghouseOwnersGroup(WOG),byreferencingWCAP-10079fand WCAP-10054, have identified NOTRUMP as their new thermal-hydraulic
- computer program for calculating small break loss of coolant accidents (SBLOCAs). The staff finds acceptable the use of NOTRUMP as the new Westinghouse licensing '
tool for calculating SBLOCAs for Westinghouse NSSS designs.
6
~
The responses to NUREG-0611 concerns, as evaluated within this SER, have also been found acceptable.
This SER completes the requirements of TMI Action Item II.K.3.30 for licensees and applicants with Westinghouse NSSS designs who were members of the WOG and referenced WCAP-10079 and WCAP-10054 as their response to this item.
Within one year of receiving this SER, the licensees and applicants with Westinghouse NSSS designs are required to submit plant specific. analyses with NOTRUMP, as required by TMI Action Item II.K.3.31. Per generic letter 83-35, -
compliance with Action Item II.K.3.31 may be submitted generically. We require
._ that the generic submittal include validation that the limiting break location i has not shifted away from the cold legs to the hot or pump suction legs.
l N
7
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