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{{#Wiki_filter:'[NDIANALMICHIGANELECTRICCOMPANYP.OaBOX18BOWLINGGREBMSTATIOHNEWYORK,H.Y.1000iApril24,1981AEP:NRC:00500ADonaldC.CookNuclearPlantUnitNos.1and2DocketNos.50-315and50-316.LicenseNos.DPR-58andDPR-74'econdquarterlyReportonHydrogenMitigationandControlMr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulationU.S.NuclearRegulatoryComIissionWashington,D.C.20555g~~=L
{{#Wiki_filter:'[NDIANALMICHIGANELECTRICCOMPANYP.OaBOX18BOWLINGGREBMSTATIOHNEWYORK,H.Y.1000iApril24,1981AEP:NRC:00500A DonaldC.CookNuclearPlantUnitNos.1and2DocketNos.50-315and50-316.LicenseNos.DPR-58andDPR-74'econd quarterly ReportonHydrogenMitigation andControlMr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulation U.S.NuclearRegulatory ComIission Washington, D.C.20555g~~=L


==DearMr.Denton:==
==DearMr.Denton:==
Thisletteranditsattachmentsconstituteoursecondquarterlyreportonhydrogen..mitigationandcontrolfortheDonaldC.CookNuclearPlantUnit[los.1and2.Thisreportisb'eingsubmittedinfulfillmentofthecommitmentmadeinourAEP:NRC:00476submittaldatedOctober7,1980andsupplementstheinformationpreviouslytransmittedtotheCommission.viaourfirstquarterlyreport,AEP:NRC:00500,datedJanuary12,1981.Asstatedinourfirstquarterlyreport,installationofthein-containmentportionofaDistributedIgnitionSystem(DIS)isscheduled-duringthe1981refuelingoutagesforUnitNos.1and2oftheCookPlant.Detailedinformationconcerningthein-containmentportionoftheDISisprovidedinAttachmentNo.2tothisletterasrequestedbymembersofyourStaff.Designoftheoutside-containmentportionoftheDIShasbeencompletedandthenecessarymaterialordersplaced.OureffortsaredirectedtowardhavingtheDISoperationalinUnitNo.2byJune1,1981.Theattachmentstothisletteraddressthevarioustopicsassociatedwithahypotheticaleventresultinginthegenerationofsub-stantiveamountsofhydrogen.Thisinformationisprovidedintheattachmentsasfollows:
Thisletteranditsattachments constitute oursecondquarterly reportonhydrogen..mitigation andcontrolfortheDonaldC.CookNuclearPlantUnit[los.1and2.Thisreportisb'eingsubmitted infulfillment ofthecommitment madeinourAEP:NRC:00476 submittal datedOctober7,1980andsupplements theinformation previously transmitted totheCommission
Mr.HaroldR.DentonAEP:NRC:00500AAttachmentNo.-~ToicContainm'entStructuralEvaluation213DistributedIgnitionSystemDesignInadequateCoreCooling/f{ydrogenControlEquipmentEquipmentSurvivabilityResearchProgramStatusCoreCoolingCapabilitySubsequent=to@drogenCombustionPreliminarySafetyEvaluationAs'statedinSection2.0oftheenclosuretoourAEP:NRC:00500submittal,AEPisinvestigatingvariouscandidatehydrogencontrolmethodsinconjunctionwithDukePowerCompanyandtheTennesseeValleyAuthority.Anevaluationo'fthestudiesperformedtodatewithregardtoHaloninerting,=Electro-magneticinterferenceemissionsfromsparkdischargeigniters,andtheuseofcatalyticcombustorswillbeforwardedtotheNRCinournextsub-mittalonthistopic.Testing.performedbyAEP/TVA/Duke/WestinghouseatFenwalIncorporatedverifiedtheabilityoftheglowplugigniterutilizedintheDIStoreliablyigniteleanhydrogen/air/steammixturesinthepresenceofwatersprayandfans.Confirmatorytests.performedbytheLawrenceLivermoreLaboratory(UCRb-84167)furthersubstantiatedourconclusions.withregardtotheFenwaltestresults;thatis,theglowplugigniterisareliableignitionsourceunderavarietyofadverseconditions.ThecontaihmentpressureandtemperatureresponsestohydrogencombustionhavebeenconservativelyestimatedusingtheCLASIXcomputercode.The=resultsoftheCLASIXanalysesshowthatde-liberateignitionofhydrogenwouldnotposeathreattocontainmentintegrityandwouldnotresultinenvironmentalconditionsmoreseverethanthecon-ditionstowhichmostofthenecessaryequipmenthasbeenqualifiedto.Basedontheresultsof.theaforementionedtestingandanalyses,wehaveconcludedthattheDISwouldservetoreducetheconsequencesofhypo-theticaleventssimilarinnaturetotheTMI-2accidentinvolvingthegener-ationofsubstantiveamountsofhydrogen.Theresearchanddevelopmentprograms,describedinAttachmentNo.5tothisletter(beingfundedbyAEP/TVA/DukeinconjunctionwiththeE1ectricPowerResearchInstitute},areex-pectedtoprovideconfirmatoryinformationinsupportoftheDISmitigationconcept.Themeritsofanypotentialmodification.tothepresentDISdesignuncoveredduringtheresearchprogramwillbedulyconsidered.
.viaourfirstquarterly report,AEP:NRC:00500, datedJanuary12,1981.Asstatedinourfirstquarterly report,installation ofthein-containment portionofaDistributed IgnitionSystem(DIS)isscheduled
Mr.HaroldR.Denton3AEP:NRC:00500AAhypotelcasma~tht1smal'lbreakloss-of;coolantaccident.withfailedECCSinjection'{S2D)hasbeenanalyzedandtheacceptabslityoftheDISmitsationconceptshownforthehydrogengenerationassociatedwith-aroximately80weightpercentzircohiumcladdingoxidation;amorefhydrogencontrolstandpointthantheTMI-2accident.Inlightoftheknowledgegainedfromtheabovementioned,testginandanalyses,assupplementedbyourcontinuedawarenessoftheissues'dis-cussedbytheNRCStaffwithregardstotheSequoyahandMcGuireNuclearlants,itisourpositionthattheDISdescribedinAttachmentNo.2to1t'llostitutethefinalhydrogencontrolsystemfortheDonaldC.CookNuclearPlantpendingcompletionofthegeneg~~ricderadedcorerulemasng.vsoukIturbeliefthatconsiderationofadditionaleventsequences,beyondS2Disnotwarrantedatthistime.Indiana8MichiganElectricCompany.interprets10CFR170.22asrequiringthatnofeeaccompanythissubmittal.Verytrulyyours,hYR.S.HunterVicePresidentcc:DohnE.Dolan-ColumbusR.C.Callen,G.Charno'ffD..V.Shaller-'ridgmanR.M.JurgensenRegionIIISite-Inspector}}
-duringthe1981refueling outagesforUnitNos.1and2oftheCookPlant.Detailedinformation concerning thein-containment portionoftheDISisprovidedinAttachment No.2tothisletterasrequested bymembersofyourStaff.Designoftheoutside-containment portionoftheDIShasbeencompleted andthenecessary materialordersplaced.OureffortsaredirectedtowardhavingtheDISoperational inUnitNo.2byJune1,1981.Theattachments tothisletteraddressthevarioustopicsassociated withahypothetical eventresulting inthegeneration ofsub-stantiveamountsofhydrogen.
Thisinformation isprovidedintheattachments asfollows:
Mr.HaroldR.DentonAEP:NRC:00500A Attachment No.-~ToicContainm'ent Structural Evaluation 213Distributed IgnitionSystemDesignInadequate CoreCooling/f{ydrogen ControlEquipment Equipment Survivability ResearchProgramStatusCoreCoolingCapability Subsequent=to
@drogenCombustion Preliminary SafetyEvaluation As'statedinSection2.0oftheenclosure toourAEP:NRC:00500 submittal, AEPisinvestigating variouscandidate hydrogencontrolmethodsinconjunction withDukePowerCompanyandtheTennessee ValleyAuthority.
Anevaluation o'fthestudiesperformed todatewithregardtoHaloninerting,=
Electro-magnetic interference emissions fromsparkdischarge
: igniters, andtheuseofcatalytic combustors willbeforwarded totheNRCinournextsub-mittalonthistopic.Testing.performed byAEP/TVA/Duke/Westinghouse atFenwalIncorporated verifiedtheabilityoftheglowplugigniterutilizedintheDIStoreliablyigniteleanhydrogen/air/steam mixturesinthepresenceofwatersprayandfans.Confirmatory tests.performed bytheLawrenceLivermore Laboratory (UCRb-84167)furthersubstantiated ourconclusions.
withregardtotheFenwaltestresults;thatis,theglowplugigniterisareliableignitionsourceunderavarietyofadverseconditions.
Thecontaihment pressureandtemperature responses tohydrogencombustion havebeenconservatively estimated usingtheCLASIXcomputercode.The=results oftheCLASIXanalysesshowthatde-liberateignitionofhydrogenwouldnotposeathreattocontainment integrity andwouldnotresultinenvironmental conditions moreseverethanthecon-ditionstowhichmostofthenecessary equipment hasbeenqualified to.Basedontheresultsof.theaforementioned testingandanalyses, wehaveconcluded thattheDISwouldservetoreducetheconsequences ofhypo-theticaleventssimilarinnaturetotheTMI-2accidentinvolving thegener-ationofsubstantive amountsofhydrogen.
Theresearchanddevelopment
: programs, described inAttachment No.5tothisletter(beingfundedbyAEP/TVA/Dukeinconjunction withtheE1ectricPowerResearchInstitute},
areex-pectedtoprovideconfirmatory information insupportoftheDISmitigation concept.Themeritsofanypotential modification
.tothepresentDISdesignuncovered duringtheresearchprogramwillbedulyconsidered.
Mr.HaroldR.Denton3AEP:NRC:00500A Ahypotelcasma~tht1smal'lbreakloss-of;coolant accident.
withfailedECCSinjection
'{S2D)hasbeenanalyzedandtheacceptabslity oftheDISmitsationconceptshownforthehydrogengeneration associated with-aroximately 80weightpercentzircohium claddingoxidation; amorefhydrogencontrolstandpoint thantheTMI-2accident.
Inlightoftheknowledge gainedfromtheabovementioned, testginandanalyses, assupplemented byourcontinued awareness oftheissues'dis-cussedbytheNRCStaffwithregardstotheSequoyahandMcGuireNuclearlants,itisourpositionthattheDISdescribed inAttachment No.2to1t'llostitutethefinalhydrogencontrolsystemfortheDonaldC.CookNuclearPlantpendingcompletion ofthegeneg~~ricderadedcorerulemasng.vsoukIturbeliefthatconsideration ofadditional eventsequences, beyondS2Disnotwarranted atthistime.Indiana8MichiganElectricCompany.interprets 10CFR170.22asrequiring thatnofeeaccompany thissubmittal.
Verytrulyyours,hYR.S.HunterVicePresident cc:DohnE.Dolan-ColumbusR.C.Callen,G.Charno'ff D..V.Shaller-'ridgman R.M.Jurgensen RegionIIISite-Inspector}}

Revision as of 07:21, 29 June 2018

Forwards Second Quarterly Rept on Hydrogen Mitigation & Control & Technical Rept Re Limiting Internal Uniform Pressure Capacity
ML17331A707
Person / Time
Site: Cook  
Issue date: 04/24/1981
From: HUNTER R S
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To: DENTON H R
Office of Nuclear Reactor Regulation
Shared Package
ML17326A884 List:
References
AEP:NRC:00500A, AEP:NRC:500A, NUDOCS 8104290515
Download: ML17331A707 (3)
v • d • e


Text

'[NDIANALMICHIGANELECTRICCOMPANYP.OaBOX18BOWLINGGREBMSTATIOHNEWYORK,H.Y.1000iApril24,1981AEP:NRC:00500A DonaldC.CookNuclearPlantUnitNos.1and2DocketNos.50-315and50-316.LicenseNos.DPR-58andDPR-74'econd quarterly ReportonHydrogenMitigation andControlMr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulation U.S.NuclearRegulatory ComIission Washington, D.C.20555g~~=L

DearMr.Denton:

Thisletteranditsattachments constitute oursecondquarterly reportonhydrogen..mitigation andcontrolfortheDonaldC.CookNuclearPlantUnit[los.1and2.Thisreportisb'eingsubmitted infulfillment ofthecommitment madeinourAEP:NRC:00476 submittal datedOctober7,1980andsupplements theinformation previously transmitted totheCommission

.viaourfirstquarterly report,AEP:NRC:00500, datedJanuary12,1981.Asstatedinourfirstquarterly report,installation ofthein-containment portionofaDistributed IgnitionSystem(DIS)isscheduled

-duringthe1981refueling outagesforUnitNos.1and2oftheCookPlant.Detailedinformation concerning thein-containment portionoftheDISisprovidedinAttachment No.2tothisletterasrequested bymembersofyourStaff.Designoftheoutside-containment portionoftheDIShasbeencompleted andthenecessary materialordersplaced.OureffortsaredirectedtowardhavingtheDISoperational inUnitNo.2byJune1,1981.Theattachments tothisletteraddressthevarioustopicsassociated withahypothetical eventresulting inthegeneration ofsub-stantiveamountsofhydrogen.

Thisinformation isprovidedintheattachments asfollows:

Mr.HaroldR.DentonAEP:NRC:00500A Attachment No.-~ToicContainm'ent Structural Evaluation 213Distributed IgnitionSystemDesignInadequate CoreCooling/f{ydrogen ControlEquipment Equipment Survivability ResearchProgramStatusCoreCoolingCapability Subsequent=to

@drogenCombustion Preliminary SafetyEvaluation As'statedinSection2.0oftheenclosure toourAEP:NRC:00500 submittal, AEPisinvestigating variouscandidate hydrogencontrolmethodsinconjunction withDukePowerCompanyandtheTennessee ValleyAuthority.

Anevaluation o'fthestudiesperformed todatewithregardtoHaloninerting,=

Electro-magnetic interference emissions fromsparkdischarge

igniters, andtheuseofcatalytic combustors willbeforwarded totheNRCinournextsub-mittalonthistopic.Testing.performed byAEP/TVA/Duke/Westinghouse atFenwalIncorporated verifiedtheabilityoftheglowplugigniterutilizedintheDIStoreliablyigniteleanhydrogen/air/steam mixturesinthepresenceofwatersprayandfans.Confirmatory tests.performed bytheLawrenceLivermore Laboratory (UCRb-84167)furthersubstantiated ourconclusions.

withregardtotheFenwaltestresults;thatis,theglowplugigniterisareliableignitionsourceunderavarietyofadverseconditions.

Thecontaihment pressureandtemperature responses tohydrogencombustion havebeenconservatively estimated usingtheCLASIXcomputercode.The=results oftheCLASIXanalysesshowthatde-liberateignitionofhydrogenwouldnotposeathreattocontainment integrity andwouldnotresultinenvironmental conditions moreseverethanthecon-ditionstowhichmostofthenecessary equipment hasbeenqualified to.Basedontheresultsof.theaforementioned testingandanalyses, wehaveconcluded thattheDISwouldservetoreducetheconsequences ofhypo-theticaleventssimilarinnaturetotheTMI-2accidentinvolving thegener-ationofsubstantive amountsofhydrogen.

Theresearchanddevelopment

programs, described inAttachment No.5tothisletter(beingfundedbyAEP/TVA/Dukeinconjunction withtheE1ectricPowerResearchInstitute},

areex-pectedtoprovideconfirmatory information insupportoftheDISmitigation concept.Themeritsofanypotential modification

.tothepresentDISdesignuncovered duringtheresearchprogramwillbedulyconsidered.

Mr.HaroldR.Denton3AEP:NRC:00500A Ahypotelcasma~tht1smal'lbreakloss-of;coolant accident.

withfailedECCSinjection

'{S2D)hasbeenanalyzedandtheacceptabslity oftheDISmitsationconceptshownforthehydrogengeneration associated with-aroximately 80weightpercentzircohium claddingoxidation; amorefhydrogencontrolstandpoint thantheTMI-2accident.

Inlightoftheknowledge gainedfromtheabovementioned, testginandanalyses, assupplemented byourcontinued awareness oftheissues'dis-cussedbytheNRCStaffwithregardstotheSequoyahandMcGuireNuclearlants,itisourpositionthattheDISdescribed inAttachment No.2to1t'llostitutethefinalhydrogencontrolsystemfortheDonaldC.CookNuclearPlantpendingcompletion ofthegeneg~~ricderadedcorerulemasng.vsoukIturbeliefthatconsideration ofadditional eventsequences, beyondS2Disnotwarranted atthistime.Indiana8MichiganElectricCompany.interprets 10CFR170.22asrequiring thatnofeeaccompany thissubmittal.

Verytrulyyours,hYR.S.HunterVicePresident cc:DohnE.Dolan-ColumbusR.C.Callen,G.Charno'ff D..V.Shaller-'ridgman R.M.Jurgensen RegionIIISite-Inspector

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