ML17261A877: Difference between revisions
StriderTol (talk | contribs) Created page by program invented by StriderTol |
StriderTol (talk | contribs) Created page by program invented by StriderTol |
||
| Line 16: | Line 16: | ||
=Text= | =Text= | ||
{{#Wiki_filter:,gccE~~ | {{#Wiki_filter:,gccE~~TED D1.'>1;jEIUTION DEMONSTR~TeIN SYSTEMREGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:8903150532 DOC.DATE: | ||
89/03/06NOTARIZED-YESDOCKETgFACIL'.50-244 RobertEmmetGinnaNuclearPlant,Unit1,Rochester G05000244AUTH.NAMEAUTHORAFFILIATION MECREDY,R.C. | |||
Rochester Gas&ElectricCorp.RECIP.NAME RECIPIENT AFFILIATION STAHLE,C. | |||
NRC-NoDetailedAffiliation Given | |||
==SUBJECT:== | ==SUBJECT:== | ||
Discusses objectives ofutilprogramtoconfirmpressurizer surgelineintegrity,per NRCBulletin88-011.DISTRIBUTION CODE:IE11DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:BulletinResponse(50DKT)NOTES:License Expdateinaccordance with10CFR2,2.109(9/19/72). | |||
05000244RECIPIENT IDCODE/NAME PD1-3LASTAHLE,CINTERNAL: | |||
AEOD/DOANRR/DEST/ADE 8HNRR/DEST/MEB 9HNRR/DOEA/GCB 11QJGkSQDLRB12GN1ILE01EXTERNAL: | |||
LPDRNSICCOPIESLTTRENCL1011111111111111111111RECIPIENT IDCODE/NAME PD1-3PDAEOD/DSP/TPABNRR/DEST/ADS 7ENRR/DOEA/EAB 11NRR/DREP/EPB 10NUDOCS-ABSTRACT RES/DSIR/EIB NRCPDRCOPIESLTTRENCL111111111111111'.1NOTE'IOALL"RIDS"RECIPZEÃIS: | |||
PLEASEHELPUSTOREDUCEWASTE!CONTACT'IHEDOCUMEMI'GÃIBOL DESK,RXMPl-37(EXT.20079)IOELQ~TEARKNAMEFRYDISTEKBVZIGN LISTSFORDOCt2KMIS YOUDGN~TNEEDfTOTALNUMBEROFCOPIESREQUIRED: | |||
LTTR19ENCL18 March6,1989U.S.NuclearRegulatory Commission DocumentControlDeskAttn:Mr.CarlStahlePWRProjectDirectorate No.1Washington, D.C.20555 | |||
==Subject:== | ==Subject:== | ||
NRCBulletinNo.88- | NRCBulletinNo.88-11Alternate ScheduleforEvaluation ofPressurizer SurgeLineThermalStratification R.E.GinnaNuclearPowerPlantDocketNo.50-244 | ||
==DearMr.Stahle:== | ==DearMr.Stahle:== | ||
OnDecember20,1988,theNRCissuedBulletinNo.88-11" | OnDecember20,1988,theNRCissuedBulletinNo.88-11"Pressurizer SurgeLineThermalStratification". | ||
~ | Itrequestsalladdressees toestablish andimplement aprogramtoconfirmpressurizer surgelineintegrity inviewoftheoccurrence ofthermalstratification, andrequiresthemtoinformthestaffoftheactionstakentoresolvethisissue.Pursuanttosatisfying therequirements andschedules ofBulletin88-11,Rochester GasandElectricCorporation isparticipating inaprogramforpartialresolution ofthisissuethroughtheWestinghouse Owner'sGroup(WOG).TheWOGprogramwasapprovedattheOctober1988meetingandhasthefollowing objectives: | ||
Atthistime, | ~DevelopagenericJustification forContinued Operation (JCO)toassurethatplantsafetyisnotcompromised whiletheeffectsofthermalstratification arebeingdetermined. | ||
Collectandsummarize relevantdesign,operational, analytical, andtestdataforasmanyWOGplantsaspossible. | |||
Inaddition, arepresentative | |||
: sampling, ofapproximately tenplants,willbeselectedtoperformareviewofplantrecordsandconductinterviews withoperations personnel. | |||
~Evaluatedataandidentifyandprioritize significant parameters contributing tothisissue.Categorize (group)~~plplantsbasedontheseparameters. | |||
w'0~~'203i5053239030'~PDFAGOCK0.":000244 | |||
~Recommend additional monitoring tosupplement theexistingtransient databaserequiredtoboundallWOGplants.Estimatetheeffectofthermalstratification onfatiguelifeasafunctionofkeyparameters. | |||
~Recommend shorttermandlongtermactions.TheWOGprogramisdesignedtobenefitfromtheexperience gainedintheperformance ofseveralplant.-specific analysesonWestinghouse PWRsurgelines.Thesedetailedanalysesincludeddefinition ofrevisedthermaltransients (including stratification) andevaluations ofpipestress,fatigueusagefactor,thermalstriping, fatiguecrackgrowth,leak-before-break,andsupportloads.Theoverallanalytical approachusedinalloftheseanalyseshasbeenconsistent andhasbeenreviewed, indetail,bytheNRCstaff.Asignificant amountofsurgelinethermalmonitoring datahasbeenobtainedinsupportoftheseplant-specific analyses. | |||
Additional surgelinethermalmonitoring andplantsystemdatacontinues tobemadeavailable withintheWOG,resulting inasteadilyincreasing database. | |||
Asignificant amountofprogresshasbeenaccomplished towardmeetingtheseobjectives. | |||
Todate,theWOGhascompleted approximately 80-odftheeffortofassembling plant-specific designinformation onalldomesticWestinghouse PWRs(55unitstotal);Theeffortwillestablish therangeofkeydesignparameters andpermitgroupingofplantsbasedontheseparameters. | |||
Basedontheinformation assembled todate,andtheexperience gainedinplant-specific analysesandmonitoring | |||
: programs, theWOGevaluation hasresultedinthefollowing observations regarding plantsimilarity andthermalstratification: | |||
1.Thermalstratification | |||
(>100'F)hasbeenmeasuredonallsurgelinesforwhichmonitoring hasbeenperformed andwhichhavebeenreviewedbytheWOGtodate(7plants).2.Theamountofstratification measuredanditsvariation withtime(cycling) varies.Thisvariation hasbeenconservatively enveloped andapplicability demonstrated forplant-specific analyses. | |||
Additional monitoring datarepresenting awiderrangeofsurgelineconfigurations maybeneededinordertodemonstrate theapplicability ofthesethermalstratification transients tootherWestinghouse units.3.Significant factorswhichcaninfluence thestructural effectsofstratification are:a.Locationanddesignofrigidsupportsand.restraints b.Pipelayoutgeometryandsizec.Typeandlocationofpipingcomponents 4.Althoughthematerialandfabrication techniques forWestinghouse surgelinesarereasonably consistent andofhighquality,thedesignparameters listedinitem3varyamongWestinghouse PWRs.Thisvariation indesignisprimarily aresultofplant-specific routingrequirements. | |||
Thisvariability iscurrently beingexaminedinordertoasse'ssthefeasibility ofa.bounding analysisapproach. | |||
Theseobservations developed throughtheongoingWOGprogram,indicatethatthedevelopment ofthermalstratification loadingsandtheevaluation offatigue,considering theseloadings, isacomplexprocess.Therefore, inordertoprecisely evaluatestratification, additional timeisneeded.Whilemoretimeisneededtoevaluatethestratification issueindetail,theNDEinspection historyatR.E.Ginna,aswellasallotherdomesticWestinghouse designedPWRs,hasnotrevealedanyserviceinduceddegradation inthesurgelinepipingthathasbeenattributed tothermalstratification. | |||
Inaddition, alltheplant-specific analysesperformed todatethathaveincludedtheloadingsduetostratification andstripinghavevalidated the"leak-before-break" conceptandhavesubstantiated a40-yearplantlife.Thus,aprudentapproachforproviding adetailedevaluation oftheeffectsofsurgelinestratification wouldbetofollowtheWOGprogramgroupingevaluation recommendations andmonitorasdetermined tobeappropriate. | |||
TheWOGhascompleted agroupingevaluation, forthepurposeofrecommending alistofadditional plantswherethermalmonitoring isneeded.Thetimerequiredforthisadditional monitoring willbedependent onplantoutageschedules. | |||
Toassurethattheplantsafetyisnotcompromised withintherequested periodofscheduleextension, aJCOwillbeprepared. | |||
TheJCO,whichiscurrently beingdeveloped, willbeavailable forstaffreview,ifdesired,within4monthsofreceiptoftheBulletin. | |||
TheJCOwillutilizetheinformation, experience, andmonitoring dataobtainedthroughtheWOGprogram,andwillsupportthealternate schedulediscussed herein.Rochester GasandElectricCorporation herebyrequestsanalternate scheduletothatrequested inBulletin88-11.Ascheduleoftwoyears,fromreceiptoftheBulletin, isconsidered sufficient timetoobtainthenecessary additional monitoring data,definethermaltransients, performallrequiredanalysesandupdatethestressandfatigueanalysestoensurecompliance withapplicable codeandregulatory requirements. | |||
Thisschedule, thoughdifferent fromthatrequested inaction1.bofBulletin88-11,isconsistent withtherequirement toupdatethestressandfatigueanalyseswithintwoyearsasstatedinaction1.do~eBulletin. | |||
Atthistime,Rochester GasandElectricCorporation's requestforanalternate scheduleappliesonlytoitem1.bofNRCBulletin88-11.Rochester GasandElectricCorporation intendstocomplywithallotherrequirements oftheBulletin, butwillinformthestaffandjustifydifferences, ifappropriate. | |||
Verytrulyyours,RobertC.MecedyGeneralManagerNuclearProduction RWEN024Subscribed andsworntobef'oremeonthis6thdayofMarch,1989.JAMESC.McGUiAENTARYPUSUC,StateoiNewYorkOuaIfiedinhbnroe CourttyMgCoinnission Exp@aOec.28,t9'zc:U.S.NuclearRegulatory Commission RegionI475Allendale RoadKingof'Prussia, PA19406GinnaSeniorResidentInspector}} | |||
Revision as of 12:21, 29 June 2018
| ML17261A877 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/06/1989 |
| From: | MECREDY R C ROCHESTER GAS & ELECTRIC CORP. |
| To: | STAHLE C NRC |
| References | |
| IEB-88-011, IEB-88-11, NUDOCS 8903150532 | |
| Download: ML17261A877 (5) | |
Text
,gccE~~TED D1.'>1;jEIUTION DEMONSTR~TeIN SYSTEMREGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:8903150532 DOC.DATE:
89/03/06NOTARIZED-YESDOCKETgFACIL'.50-244 RobertEmmetGinnaNuclearPlant,Unit1,Rochester G05000244AUTH.NAMEAUTHORAFFILIATION MECREDY,R.C.
Rochester Gas&ElectricCorp.RECIP.NAME RECIPIENT AFFILIATION STAHLE,C.
NRC-NoDetailedAffiliation Given
SUBJECT:
Discusses objectives ofutilprogramtoconfirmpressurizer surgelineintegrity,per NRCBulletin88-011.DISTRIBUTION CODE:IE11DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:BulletinResponse(50DKT)NOTES:License Expdateinaccordance with10CFR2,2.109(9/19/72).
05000244RECIPIENT IDCODE/NAME PD1-3LASTAHLE,CINTERNAL:
AEOD/DOANRR/DEST/ADE 8HNRR/DEST/MEB 9HNRR/DOEA/GCB 11QJGkSQDLRB12GN1ILE01EXTERNAL:
LPDRNSICCOPIESLTTRENCL1011111111111111111111RECIPIENT IDCODE/NAME PD1-3PDAEOD/DSP/TPABNRR/DEST/ADS 7ENRR/DOEA/EAB 11NRR/DREP/EPB 10NUDOCS-ABSTRACT RES/DSIR/EIB NRCPDRCOPIESLTTRENCL111111111111111'.1NOTE'IOALL"RIDS"RECIPZEÃIS:
PLEASEHELPUSTOREDUCEWASTE!CONTACT'IHEDOCUMEMI'GÃIBOL DESK,RXMPl-37(EXT.20079)IOELQ~TEARKNAMEFRYDISTEKBVZIGN LISTSFORDOCt2KMIS YOUDGN~TNEEDfTOTALNUMBEROFCOPIESREQUIRED:
LTTR19ENCL18 March6,1989U.S.NuclearRegulatory Commission DocumentControlDeskAttn:Mr.CarlStahlePWRProjectDirectorate No.1Washington, D.C.20555
Subject:
NRCBulletinNo.88-11Alternate ScheduleforEvaluation ofPressurizer SurgeLineThermalStratification R.E.GinnaNuclearPowerPlantDocketNo.50-244
DearMr.Stahle:
OnDecember20,1988,theNRCissuedBulletinNo.88-11"Pressurizer SurgeLineThermalStratification".
Itrequestsalladdressees toestablish andimplement aprogramtoconfirmpressurizer surgelineintegrity inviewoftheoccurrence ofthermalstratification, andrequiresthemtoinformthestaffoftheactionstakentoresolvethisissue.Pursuanttosatisfying therequirements andschedules ofBulletin88-11,Rochester GasandElectricCorporation isparticipating inaprogramforpartialresolution ofthisissuethroughtheWestinghouse Owner'sGroup(WOG).TheWOGprogramwasapprovedattheOctober1988meetingandhasthefollowing objectives:
~DevelopagenericJustification forContinued Operation (JCO)toassurethatplantsafetyisnotcompromised whiletheeffectsofthermalstratification arebeingdetermined.
Collectandsummarize relevantdesign,operational, analytical, andtestdataforasmanyWOGplantsaspossible.
Inaddition, arepresentative
- sampling, ofapproximately tenplants,willbeselectedtoperformareviewofplantrecordsandconductinterviews withoperations personnel.
~Evaluatedataandidentifyandprioritize significant parameters contributing tothisissue.Categorize (group)~~plplantsbasedontheseparameters.
w'0~~'203i5053239030'~PDFAGOCK0.":000244
~Recommend additional monitoring tosupplement theexistingtransient databaserequiredtoboundallWOGplants.Estimatetheeffectofthermalstratification onfatiguelifeasafunctionofkeyparameters.
~Recommend shorttermandlongtermactions.TheWOGprogramisdesignedtobenefitfromtheexperience gainedintheperformance ofseveralplant.-specific analysesonWestinghouse PWRsurgelines.Thesedetailedanalysesincludeddefinition ofrevisedthermaltransients (including stratification) andevaluations ofpipestress,fatigueusagefactor,thermalstriping, fatiguecrackgrowth,leak-before-break,andsupportloads.Theoverallanalytical approachusedinalloftheseanalyseshasbeenconsistent andhasbeenreviewed, indetail,bytheNRCstaff.Asignificant amountofsurgelinethermalmonitoring datahasbeenobtainedinsupportoftheseplant-specific analyses.
Additional surgelinethermalmonitoring andplantsystemdatacontinues tobemadeavailable withintheWOG,resulting inasteadilyincreasing database.
Asignificant amountofprogresshasbeenaccomplished towardmeetingtheseobjectives.
Todate,theWOGhascompleted approximately 80-odftheeffortofassembling plant-specific designinformation onalldomesticWestinghouse PWRs(55unitstotal);Theeffortwillestablish therangeofkeydesignparameters andpermitgroupingofplantsbasedontheseparameters.
Basedontheinformation assembled todate,andtheexperience gainedinplant-specific analysesandmonitoring
- programs, theWOGevaluation hasresultedinthefollowing observations regarding plantsimilarity andthermalstratification:
1.Thermalstratification
(>100'F)hasbeenmeasuredonallsurgelinesforwhichmonitoring hasbeenperformed andwhichhavebeenreviewedbytheWOGtodate(7plants).2.Theamountofstratification measuredanditsvariation withtime(cycling) varies.Thisvariation hasbeenconservatively enveloped andapplicability demonstrated forplant-specific analyses.
Additional monitoring datarepresenting awiderrangeofsurgelineconfigurations maybeneededinordertodemonstrate theapplicability ofthesethermalstratification transients tootherWestinghouse units.3.Significant factorswhichcaninfluence thestructural effectsofstratification are:a.Locationanddesignofrigidsupportsand.restraints b.Pipelayoutgeometryandsizec.Typeandlocationofpipingcomponents 4.Althoughthematerialandfabrication techniques forWestinghouse surgelinesarereasonably consistent andofhighquality,thedesignparameters listedinitem3varyamongWestinghouse PWRs.Thisvariation indesignisprimarily aresultofplant-specific routingrequirements.
Thisvariability iscurrently beingexaminedinordertoasse'ssthefeasibility ofa.bounding analysisapproach.
Theseobservations developed throughtheongoingWOGprogram,indicatethatthedevelopment ofthermalstratification loadingsandtheevaluation offatigue,considering theseloadings, isacomplexprocess.Therefore, inordertoprecisely evaluatestratification, additional timeisneeded.Whilemoretimeisneededtoevaluatethestratification issueindetail,theNDEinspection historyatR.E.Ginna,aswellasallotherdomesticWestinghouse designedPWRs,hasnotrevealedanyserviceinduceddegradation inthesurgelinepipingthathasbeenattributed tothermalstratification.
Inaddition, alltheplant-specific analysesperformed todatethathaveincludedtheloadingsduetostratification andstripinghavevalidated the"leak-before-break" conceptandhavesubstantiated a40-yearplantlife.Thus,aprudentapproachforproviding adetailedevaluation oftheeffectsofsurgelinestratification wouldbetofollowtheWOGprogramgroupingevaluation recommendations andmonitorasdetermined tobeappropriate.
TheWOGhascompleted agroupingevaluation, forthepurposeofrecommending alistofadditional plantswherethermalmonitoring isneeded.Thetimerequiredforthisadditional monitoring willbedependent onplantoutageschedules.
Toassurethattheplantsafetyisnotcompromised withintherequested periodofscheduleextension, aJCOwillbeprepared.
TheJCO,whichiscurrently beingdeveloped, willbeavailable forstaffreview,ifdesired,within4monthsofreceiptoftheBulletin.
TheJCOwillutilizetheinformation, experience, andmonitoring dataobtainedthroughtheWOGprogram,andwillsupportthealternate schedulediscussed herein.Rochester GasandElectricCorporation herebyrequestsanalternate scheduletothatrequested inBulletin88-11.Ascheduleoftwoyears,fromreceiptoftheBulletin, isconsidered sufficient timetoobtainthenecessary additional monitoring data,definethermaltransients, performallrequiredanalysesandupdatethestressandfatigueanalysestoensurecompliance withapplicable codeandregulatory requirements.
Thisschedule, thoughdifferent fromthatrequested inaction1.bofBulletin88-11,isconsistent withtherequirement toupdatethestressandfatigueanalyseswithintwoyearsasstatedinaction1.do~eBulletin.
Atthistime,Rochester GasandElectricCorporation's requestforanalternate scheduleappliesonlytoitem1.bofNRCBulletin88-11.Rochester GasandElectricCorporation intendstocomplywithallotherrequirements oftheBulletin, butwillinformthestaffandjustifydifferences, ifappropriate.
Verytrulyyours,RobertC.MecedyGeneralManagerNuclearProduction RWEN024Subscribed andsworntobef'oremeonthis6thdayofMarch,1989.JAMESC.McGUiAENTARYPUSUC,StateoiNewYorkOuaIfiedinhbnroe CourttyMgCoinnission Exp@aOec.28,t9'zc:U.S.NuclearRegulatory Commission RegionI475Allendale RoadKingof'Prussia, PA19406GinnaSeniorResidentInspector