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Category:INTERNAL OR EXTERNAL MEMORANDUM
MONTHYEARML20217A9811999-10-30030 October 1999 Forwards Sept 1999 Performance Indicator Data Rept for Revised Reactor Oversight Process Pilot Program.Rept Includes Data Through Aug 1999 (two-thirds of 3rd Quarter of 1999) for 13 Units at 9 Pilot Sites ML20217P5261999-10-20020 October 1999 Forwards Rev 0,Change 1 to Millstone Unit 1 Northeast Utils QA Program ML20217E9841999-10-14014 October 1999 Forwards Petition for Leave to Intervene Submitted on 991006 by Connecticut Coalition Against Millstone & Long Island Coalition Against Millstone ML20217A7971999-10-0606 October 1999 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered During Week of 990607 ML20212F5461999-09-23023 September 1999 Notification of 991004 Meeting with Utils in Rockville,Md to Update Status of Nuclear Mgt Company & Provide Details of Member Licensees Impending License Transfer Applications & Operating Agreement ML20216F5061999-09-16016 September 1999 Forwards Monthly Rept on Status of 10CFR2.206 Petitions as of 990831.During August,Director'S Decision (DD-99-10) on Seabrook Issued & Petition Closed.Six Petitions Open,Five in NRR & One in Nmss.Attachment 2 Withheld ML20216F3591999-09-15015 September 1999 Informs That Encl SRM on COMSECY-99-016 Being Released to Public,Effective 990915.Encl Documents Including 990406 SRM in Response to Millstone Independent Review Team 990312 Rept & 990713 Memo from G Caputo Previously Released ML20211K1431999-09-0202 September 1999 Notification of 990920 Meeting with Util in Rockville,Md to Discuss Recent Developments in New England Re Industry Deregulation & Restructuring Affecting Nu Use of Performance Indicators as Operating Plant ML20210U1461999-08-13013 August 1999 Notification of 990827 Meeting with NNECO in King of Prussia,Pennsylvania to Discuss Engineering Initiatives & Backlog Management ML20210F6981999-07-27027 July 1999 Discusses 990430 Request for Waiver of 10CFR170 Fees for Certain Insp Efforts Re NRR Pilot Regulatory Oversight Program.Determined That Thirteen Plants in Pilot Program Will Be Exempted from 10CFR170 Fees for Insp Efforts ML20210E9311999-07-26026 July 1999 Notification of 990825 Public Meeting in Waterford,Ct Re PSDAR for Plant Unit 1 ML20210K1421999-07-22022 July 1999 Informs That Recipient Designated Chairman of Millstone Assessment Panel & E Adensam,Designated Co-Chairman.Panel Established to Assist Region I & NRR in Coordination of NRC Resources for Performance Monitoring & Inspecting Millstone ML20210C1631999-07-19019 July 1999 Forwards Monthly Rept Which Gives Status of 10CFR2.206 Petitions as of 990630.Six Open NRR,1 OE & 2 NMSS Petitions Available.Attachment 2 Withheld ML20209G0541999-07-13013 July 1999 Submits Director'S Guidance 99-001,effective Immediately,As Result of SRM in Response to Recommendations in Plant Independent Review Team Rept, ML20212J5161999-07-0101 July 1999 Documents,For Public Record,Interaction Between NNECO & NRC Staff Re Licensee Proposed Licensing Action Now Being Reviewed by NRC Staff ML20209D7621999-06-29029 June 1999 Notification of Meeting 99-40 on 990715 with Nuclear Energy Advisory Council in Waterford,Ct to Discuss Millstone Safety Conscious Work Environ/Employee Concerns Program ML20209D7721999-06-29029 June 1999 Notification of 990715 Meeting 99-39 with Util in Waterford, CT Re Corrective Action & Safety Conscious Work Environ/ Employee Concerns Program Team Exit Meeting ML20196H8491999-06-28028 June 1999 Forwards June 1999 Performance Indicator (PI) Data Rept for Revised Reactor Oversight Process Pilot Program.Rept Constitutes Second Monthly PI Data Submittal from Pilot Plant Licensees,Which Includes Data Through May 1999 ML20212H9471999-06-22022 June 1999 Informs That No Addl Work Required on TACs M91735 & M95118 & Closes TACs Administratively ML20196F0581999-06-21021 June 1999 Discusses Update of Status of Petition,Dtd 961125,as Amended by Ltr,Dtd 961223,by Petitioners Re Millstone,Units 1,2 & 3 & Haddam Neck Nuclear Facilities ML20210G9711999-06-16016 June 1999 Informs That on June 9,two Occurrences of Hydrogen Burns Took Place at Palisades During VSC-24 Loading Activities ML20210G9611999-06-14014 June 1999 Informs That Sfpo Not Sure of Having Lead for Palisades Events Being Handled by Region III Insp ML20210G9411999-06-11011 June 1999 Informs That on 990610 Palisades 1 Notfied NRC That on 990609,minor Hydrogen Burns Occurred During Welding of Structural Lid on Sf Storage Cask ML20210G8871999-06-10010 June 1999 Forwards Draft Pn Region Iii,Concerning Latest Hydrogen Burn at Palisades ML20210G9091999-06-10010 June 1999 Requests That Cio Make Copy of Pn to Be Sent to M Sinclair in Midland,Mi ML20210G9361999-06-10010 June 1999 Informs That Attachment Has Been Reviewed & Approved in DNMS Re Palisades Pn ML20207F0951999-06-0404 June 1999 Forwards Figure 1 to Millstone Combined Insp Repts 50-245/99-05,50-336/99-05 & 50-423/99-05.Rept e-mailed on 990604 IR 05000336/19990041999-05-10010 May 1999 Forwards Database Used by Licensee to Track Questions Asked During Osti,Insp Rept 50-336/99-04.Summary of Licensee Responses Also Provided ML20210F7021999-04-30030 April 1999 Requests Waiver of Fees for Thirteen Dockets That Compromise Plant Population for NRR Pilot Regulatory Oversight Program. Purposes of Pilot Program Described in Commission Papers SECY-99-007 & SECY-99-007A ML20206A6041999-04-23023 April 1999 Notification of 990506 Meeting with Util in Rockville,Md to Provide Northest Nuclear Energy with Opportunity to Discuss Status of Development of post-shutdown Decommissioning Activities Rept for Unit 1 ML20206A1791999-04-22022 April 1999 Forwards Supplemental Info Related to Questions Re 50 Mile Ingestion Pathway Associated with Millstone Nuclear Facility That Were Raised During 990414 Commission Meeting on Remaining Issues Re Proposed Restart of Unit 2 DD-99-05, Forwards Monthly Rept on Status of 10CFR2.206 Petition as of 990331.During March,Director'S Decision (DD-99-06) on Browns Ferry & DD on Army Corps of Engineers Was Issued & (DD-99-05) on Diablo Canyon Became Final Agency Action1999-04-20020 April 1999 Forwards Monthly Rept on Status of 10CFR2.206 Petition as of 990331.During March,Director'S Decision (DD-99-06) on Browns Ferry & DD on Army Corps of Engineers Was Issued & (DD-99-05) on Diablo Canyon Became Final Agency Action ML20206B2371999-04-19019 April 1999 Forwards Questions & Answers Addressing Long Island Emergency Planning Issue Raised at Commission Meeting ML20205N1641999-04-0606 April 1999 Notification of Significant Licensee Meeting 99-18 with Util on 990420 in King of Prussia,Pa to Discuss Plant Unit 3 Outage Plans ML20205J1961999-03-31031 March 1999 Discusses Clarification of Enforcement Discussion in 990319 Millstone Independent Review Team Rept ML20205C3041999-03-23023 March 1999 Notification of Significant Meeting 99-15 on 990407 with NNECO in Waterford,Ct,To Discuss Operational Safety Team Insp Exit Meeting for Millstone,Unit 2 ML20207L1901999-03-16016 March 1999 Informs That NRC Staff Set Up Single Electronic Mail Address to Receive All Communications (Including Service of Filings) Re CP&L Proceeding.All Electronic Communications Should Be Sent to Counsel for NRC Staff at New Electronic Address ML20205J2011999-03-15015 March 1999 Forwards Annotated Draft Info Notice 99-XX Re Inadvertent Discharge of Carbon Dioxide Fire Suppression Sys in Cable Spreading Room,Reflecting Util Changes ML20207L5671999-03-12012 March 1999 Forwards Facility Submitted Outline,Initial Exam Submittal & as Given Operating Exam for Test Administered on 981130,1204-14 & 18 ML20207H4601999-03-0404 March 1999 Notification of 990318 Meeting with Northeast Nuclear Energy Co in Waterford,Connecticut to Discuss Exit Meeting Results of Millstone Unit 2 Independent C/A Program C/A Insp Performed by NRR ML20207K4011999-03-0404 March 1999 Rev 1 to Notification of Significant Meeting 99-12 with Util on 990318 in Waterford,Ct to Discuss Recovery of Millstone, Unit 2.Location of Meeting Has Been Changed ML20207K4071999-03-0404 March 1999 Notification of Significant Licensee Meeting 99-11 with Util on 990318 in Waterford,Ct to Discuss Plans,Schedules & Progress Toward Recovery of Plant,Unit 2 ML20207E6091999-03-0303 March 1999 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 980622-26 ML20206U3581999-02-0303 February 1999 Notification of Significant Licensee Meeting 99-08 with Util on 990217 Re 40500 Corrective Action Team Exit Meeting ML20202H7791999-02-0202 February 1999 Forwards Draft Request for Addl Info Re Loss of Main Feedwater Transient Analysis ML20202H7171999-02-0202 February 1999 Forwards Draft RAI Re Reg Guide 1.97 Deviation Request Involving Containment Area Radiation ML20202H7591999-02-0101 February 1999 Forwards Draft Request for Addl Info Re Radiological Consequences of Steam Generator Tube Rupture ML20202E4391999-01-28028 January 1999 Forwards Draft RAI Transmitted by Facsimile on 990127 to R Joshi of Licensee Staff Re post-LOCA Long Term Cooling. Review of RAI Would Allow Licensee to Determine & Agree Upon Schedule to Respond to RAI ML20204J6171999-01-27027 January 1999 Responds to 990107 Memo Re OI General Event Inquiry Case 99-01S,NRC Handling of Harassment & Intimidation Complaints at Millstone.Listed C/As Have Been or Will Be Taken ML20202E4361999-01-27027 January 1999 Forwards Draft RAI Transmitted by Facsimile on 990127 to R Joshi of Licensee Staff Re post-LOCA Long Term Cooling. Review of RAI Would Allow Licensee to Determine & Agree Upon Schedule to Respond to RAI 1999-09-23
[Table view] Category:MEMORANDUMS-CORRESPONDENCE
MONTHYEARML20217A9811999-10-30030 October 1999 Forwards Sept 1999 Performance Indicator Data Rept for Revised Reactor Oversight Process Pilot Program.Rept Includes Data Through Aug 1999 (two-thirds of 3rd Quarter of 1999) for 13 Units at 9 Pilot Sites ML20217J8951999-10-21021 October 1999 Staff Requirements Memo Re Affirmation Session on 991021, Rockville,Md (Open to Public Attendance) ML20217P5261999-10-20020 October 1999 Forwards Rev 0,Change 1 to Millstone Unit 1 Northeast Utils QA Program ML20217E9841999-10-14014 October 1999 Forwards Petition for Leave to Intervene Submitted on 991006 by Connecticut Coalition Against Millstone & Long Island Coalition Against Millstone ML20217D3601999-10-13013 October 1999 Staff Requirements Memo on SECY-99-223 Re Millstone Independent Review Team 990312 Rept on Allegations of Discrimination in NRC Ofc of Investigation Cases Nda: 1-96-002,1-96-007 & 1-97-007 & Associated Recommendation 6 ML20217A7971999-10-0606 October 1999 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered During Week of 990607 ML20212F5461999-09-23023 September 1999 Notification of 991004 Meeting with Utils in Rockville,Md to Update Status of Nuclear Mgt Company & Provide Details of Member Licensees Impending License Transfer Applications & Operating Agreement ML20216F5061999-09-16016 September 1999 Forwards Monthly Rept on Status of 10CFR2.206 Petitions as of 990831.During August,Director'S Decision (DD-99-10) on Seabrook Issued & Petition Closed.Six Petitions Open,Five in NRR & One in Nmss.Attachment 2 Withheld ML20216F3591999-09-15015 September 1999 Informs That Encl SRM on COMSECY-99-016 Being Released to Public,Effective 990915.Encl Documents Including 990406 SRM in Response to Millstone Independent Review Team 990312 Rept & 990713 Memo from G Caputo Previously Released ML20211K1431999-09-0202 September 1999 Notification of 990920 Meeting with Util in Rockville,Md to Discuss Recent Developments in New England Re Industry Deregulation & Restructuring Affecting Nu Use of Performance Indicators as Operating Plant ML20210U1461999-08-13013 August 1999 Notification of 990827 Meeting with NNECO in King of Prussia,Pennsylvania to Discuss Engineering Initiatives & Backlog Management ML20210F6981999-07-27027 July 1999 Discusses 990430 Request for Waiver of 10CFR170 Fees for Certain Insp Efforts Re NRR Pilot Regulatory Oversight Program.Determined That Thirteen Plants in Pilot Program Will Be Exempted from 10CFR170 Fees for Insp Efforts ML20210E9311999-07-26026 July 1999 Notification of 990825 Public Meeting in Waterford,Ct Re PSDAR for Plant Unit 1 ML20210K1421999-07-22022 July 1999 Informs That Recipient Designated Chairman of Millstone Assessment Panel & E Adensam,Designated Co-Chairman.Panel Established to Assist Region I & NRR in Coordination of NRC Resources for Performance Monitoring & Inspecting Millstone ML20210C1631999-07-19019 July 1999 Forwards Monthly Rept Which Gives Status of 10CFR2.206 Petitions as of 990630.Six Open NRR,1 OE & 2 NMSS Petitions Available.Attachment 2 Withheld ML20209G0541999-07-13013 July 1999 Submits Director'S Guidance 99-001,effective Immediately,As Result of SRM in Response to Recommendations in Plant Independent Review Team Rept, ML20216F3651999-07-0707 July 1999 Staff Requirements Memo Re COMSECY-99-016, Recommendations 2 & 3 of Mirt,Re Witness Credibility & OI Conclusions,Staff Requirements Memo ML20212J5161999-07-0101 July 1999 Documents,For Public Record,Interaction Between NNECO & NRC Staff Re Licensee Proposed Licensing Action Now Being Reviewed by NRC Staff ML20209D7621999-06-29029 June 1999 Notification of Meeting 99-40 on 990715 with Nuclear Energy Advisory Council in Waterford,Ct to Discuss Millstone Safety Conscious Work Environ/Employee Concerns Program ML20209D7721999-06-29029 June 1999 Notification of 990715 Meeting 99-39 with Util in Waterford, CT Re Corrective Action & Safety Conscious Work Environ/ Employee Concerns Program Team Exit Meeting ML20196H8491999-06-28028 June 1999 Forwards June 1999 Performance Indicator (PI) Data Rept for Revised Reactor Oversight Process Pilot Program.Rept Constitutes Second Monthly PI Data Submittal from Pilot Plant Licensees,Which Includes Data Through May 1999 ML20212H9471999-06-22022 June 1999 Informs That No Addl Work Required on TACs M91735 & M95118 & Closes TACs Administratively ML20196F0581999-06-21021 June 1999 Discusses Update of Status of Petition,Dtd 961125,as Amended by Ltr,Dtd 961223,by Petitioners Re Millstone,Units 1,2 & 3 & Haddam Neck Nuclear Facilities ML20210G9711999-06-16016 June 1999 Informs That on June 9,two Occurrences of Hydrogen Burns Took Place at Palisades During VSC-24 Loading Activities ML20210G9611999-06-14014 June 1999 Informs That Sfpo Not Sure of Having Lead for Palisades Events Being Handled by Region III Insp ML20210G9411999-06-11011 June 1999 Informs That on 990610 Palisades 1 Notfied NRC That on 990609,minor Hydrogen Burns Occurred During Welding of Structural Lid on Sf Storage Cask ML20210G8871999-06-10010 June 1999 Forwards Draft Pn Region Iii,Concerning Latest Hydrogen Burn at Palisades ML20210G9091999-06-10010 June 1999 Requests That Cio Make Copy of Pn to Be Sent to M Sinclair in Midland,Mi ML20210G9361999-06-10010 June 1999 Informs That Attachment Has Been Reviewed & Approved in DNMS Re Palisades Pn ML20207F0951999-06-0404 June 1999 Forwards Figure 1 to Millstone Combined Insp Repts 50-245/99-05,50-336/99-05 & 50-423/99-05.Rept e-mailed on 990604 ML20212A8181999-05-25025 May 1999 Staff Requirements Memo Re SECY-99-010, Closure of Order Requiring Third-Party Oversight of Northeast Nuclear Energy Implementation of Resolution of Millstone Station Employee Safety Concerns IR 05000336/19990041999-05-10010 May 1999 Forwards Database Used by Licensee to Track Questions Asked During Osti,Insp Rept 50-336/99-04.Summary of Licensee Responses Also Provided ML20210F7021999-04-30030 April 1999 Requests Waiver of Fees for Thirteen Dockets That Compromise Plant Population for NRR Pilot Regulatory Oversight Program. Purposes of Pilot Program Described in Commission Papers SECY-99-007 & SECY-99-007A ML20206B9511999-04-28028 April 1999 Staff Requirements Memo Re Briefing on Remaining Issues Concerning Proposed Restart of Millstone Unit 2 (SECY-99-109) on 990414 in Rockville,Md (Open to Public) ML20206B2501999-04-28028 April 1999 Staff Requirements Memo Re SECY-99-109,recovery of Millstone Nuclear Power Station,Unit 2.Commission Agreed with Staff Conclusions That Nene Satisfied 960814,independent Corrective Action Verification Program Order ML20206B2261999-04-28028 April 1999 Staff Requirements Memo Re Briefing on Remaining Issues Related to Proposed Restart of Millstone Unit 2 (SECY-99-109) on 990414 in Rockville,Md.Briefing Open to Public Attendance ML20206A6041999-04-23023 April 1999 Notification of 990506 Meeting with Util in Rockville,Md to Provide Northest Nuclear Energy with Opportunity to Discuss Status of Development of post-shutdown Decommissioning Activities Rept for Unit 1 ML20206A1791999-04-22022 April 1999 Forwards Supplemental Info Related to Questions Re 50 Mile Ingestion Pathway Associated with Millstone Nuclear Facility That Were Raised During 990414 Commission Meeting on Remaining Issues Re Proposed Restart of Unit 2 DD-99-05, Forwards Monthly Rept on Status of 10CFR2.206 Petition as of 990331.During March,Director'S Decision (DD-99-06) on Browns Ferry & DD on Army Corps of Engineers Was Issued & (DD-99-05) on Diablo Canyon Became Final Agency Action1999-04-20020 April 1999 Forwards Monthly Rept on Status of 10CFR2.206 Petition as of 990331.During March,Director'S Decision (DD-99-06) on Browns Ferry & DD on Army Corps of Engineers Was Issued & (DD-99-05) on Diablo Canyon Became Final Agency Action ML20206B2371999-04-19019 April 1999 Forwards Questions & Answers Addressing Long Island Emergency Planning Issue Raised at Commission Meeting ML20205N1641999-04-0606 April 1999 Notification of Significant Licensee Meeting 99-18 with Util on 990420 in King of Prussia,Pa to Discuss Plant Unit 3 Outage Plans ML20205H7501999-04-0606 April 1999 Staff Requirements Memo in Response to EDO Memo Re OIG Inquiry,Case 99-01S & Remaining Issues from SECY-98-292.Commission Approved C/As Described in EDO Memo ML20205H7291999-04-0606 April 1999 Staff Requirements Memo in Response to Millstone Independent Review Team 990312 Rept on Allegations of Discrimination in NRC Office of Investigations Cases 1-96-002,1-96-007, 1-97-007 & Associated Lessons Learned ML20205J1961999-03-31031 March 1999 Discusses Clarification of Enforcement Discussion in 990319 Millstone Independent Review Team Rept ML20205C3041999-03-23023 March 1999 Notification of Significant Meeting 99-15 on 990407 with NNECO in Waterford,Ct,To Discuss Operational Safety Team Insp Exit Meeting for Millstone,Unit 2 ML20207L1901999-03-16016 March 1999 Informs That NRC Staff Set Up Single Electronic Mail Address to Receive All Communications (Including Service of Filings) Re CP&L Proceeding.All Electronic Communications Should Be Sent to Counsel for NRC Staff at New Electronic Address ML20205J2011999-03-15015 March 1999 Forwards Annotated Draft Info Notice 99-XX Re Inadvertent Discharge of Carbon Dioxide Fire Suppression Sys in Cable Spreading Room,Reflecting Util Changes ML20207L5671999-03-12012 March 1999 Forwards Facility Submitted Outline,Initial Exam Submittal & as Given Operating Exam for Test Administered on 981130,1204-14 & 18 ML20207G0521999-03-0909 March 1999 Staff Requirements Memo on SECY-99-010 Re Closure of Order Requiring independent,third-party Oversight of Northeast Nuclear Energy Co Implementation of Resolution of Millstone Station Employees Safety Concerns ML20207K4071999-03-0404 March 1999 Notification of Significant Licensee Meeting 99-11 with Util on 990318 in Waterford,Ct to Discuss Plans,Schedules & Progress Toward Recovery of Plant,Unit 2 1999-09-23
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Juno 24, 1996 felDRAIER81 T0: Phillip F. McKee, Director i Project Directorate I-3 (N111 stone-2)
Division of Reactor Projects I/II l Eugene V. Imbro, Director
- Project Directorate 11-1 (Shearon Harris-1, H.8 Robinson-2)
! Division of Reactor Projects I/II John N. Hannon, Director l Project Director 111-1 (Pa111sades)
! Division of Reactor Pro;jects III/IV Frederick J. Hebdon, Director i Project Director II-3 (St. Lucie-1) l Division of Reactor Projects I/II i
! Gail H. Marcus, Director l Project Director III-3 (Kewaunee) l Division of Reactor Pro;iects III/IV FROM: Timothy E. Collins, Acting Chief Reactor Systems Branch i Division of Systems and Analysis 1
SU8 JECT: POTENTIAL VIOLATION OF 10 CFR 50.46 l We have recently completed an audit review of changes to the Siemens large
! break ECCS evaluation model which is used at one or more plants under your
- purview (Kawuanee, M111 stone-2 Pa111sades, N.B. Robinson-2, Shearon Harris 1, St.Lucte-1). We have determined that Siemens made significant changes to the code without staff approval and may have incorporated these model clianges into
- plant specific licensing calculations for the noted plants. The not impact of 1
the unapproved model changes for some plants where tte Siemens 1991
- methodology was used exceeded 50 degrees in the calculation of PCT used in the 4 LOCA analyses. We are concerned that these plants may be operating in violation of 10 CFR 50.46. Specifically, Appendix K requires that, when 4 l
! significant change is made to the evaluation model ( > 50 degrees F PCT impact) the evaluation model must, at the same time be modifned to delete the use of the Dougall-Rohsenow film boiling correlation (see Appendix K. j i I. C. 5. c). "he Dougall-Rohsenow correlation was not deleted when the above i noted changes were made to the code. In addition, the impact of the changes
! were not reported to the staff as required by 10 CFR 50.46. We recommend that ;s I you send the attached letter to the individual licensees to notify them of the 1 I potential violation.
l OFV2
[ f@J" N R C H l.E ( E i a C O P Y
Contact:
G. Thomas, SRK8/DSSA, 415-1814 i *see previous concurrence page j SRx8:DSSA* SASG:DSSA* SRX8:DSSA* SASG:DSSAY SR18:
i STHOMAS JSTAUDD81EIER ALEVIN RCARUS0 COLLINS j y 6/21/96 6/24/96 6/11/96 6hy/96 G:\SEDWIC l 9 * -ssosa. L-'t-I prw Can j u.- ic cr x S(4-n.Aws 9('l'f*""Q\'
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j N nuclear Regulatory Commission (NRC) staff approved the siemens large break
] ECC5 evaluatten model en July 8,1986. N evaluation model approved by the
! staff included the T000EE2 code. We have recently completed an audit review l of changes to W Siemens large break ECCS evaluation model which is uwJ
! at--- . We have determined that Siemens made significant changes to the code I
without staff approval and may have incorporated these model changes into plant specific Itcensing calculations. The not impact of the unapproved model j changes for same plants where the Siemens 1991 methodology was used exceeded 50 degrees in the calculation of KT used in the LOCA analyses. We are
- concerned that--- plant may be operating in violation of 10 CFR 50.46.
l Specifically, Appendix K tres that, when a significant change is made to the evaluation model (> 50 rees F K T impact) the evaluation model must, at l l N same time be modified to delete the use of the Dougall-Rohsenow fils
- boiling correlation (see Appendix K. I. C. 5. c). N Dougall-Robsenow j
correlation was not replaced when the aforementioned model changes were made.
hrefore, the model does not meet h requirement of Appendix K. In addition l the impact of the changes were not reported to the staff as required by 10 CFR i 50.46.
Since ------- uses the Siemens ECCS evaluation model for the LOCA analyses, we st that you ascertain whether ----used the unapproved 1991 version of the
- 1. A plant for which the unapproved methodolony was used may be in violation of 10 CFR 50.46. If the unapproved vers'on of the model was used, we request that you evaluate the not tapact of the code changes in the calculation of KT.10 CFR 50.46 requires that the licensee estimate the effect of any change in a acceptable evaluation model to determine if the change is significant. 10 CFR 50.46 also states that a significant change is one which results in a calculated KT different by more than 50 degrees F from i the temperature calculated for the limitN transient using the last acceptable model. 10 CFR 50.46 also states that if the change is significant, the licensee shall provide the report within 30 days and include with the report a proposed schedule for providing a reanalysis or taking owr action as may be needed to show compilance with 10 CFR 50.46. h staff expects that
will promptly report back to the staff if the change in calculated KT is greater than 50 degrees F.
1 4
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i 5 DWic0enald Jr l SRIS R/F GThomas
- RJLaufer '
i RJenes '
Karuse lSte l i
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. TCollins !
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