ML17331A739

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Proposed Tech Specs 3.6.4.3 & 4.6.4.3 & Table 3.6-1A Re Hydrogen Control Interim Distributed Ignition Sys Limiting Condition for Operation & Surveillance Requirements & Location of Igniter Groupings
ML17331A739
Person / Time
Site: Cook  American Electric Power icon.png
Issue date: 05/29/1981
From:
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17331A738 List:
References
NUDOCS 8106030207
Download: ML17331A739 (4)


Text

DONALDC.COOKNUCLEARPLANTUNITNOS.1AND2ATTACHMENTNO.2TOAEP:NRC:00500C CONTAINMENTSYSTEMSHYDROGEN.CONTROLINTERIMDISTRIBUTEDIGNITIONSYSTEMLIMITINGCONDITIONFOROPERATION3.6.4.3.TwotrainsoftheDistributed'IgnitionSystem(DIS)shallbeoperable.APPLICABILITY:Modes1and2ACTIONWiththeDISinoperable,restorethesystemtoOPERABLEstatuswithin7daysorbeinHOTSTANDBYwithinthenext6hours.SURVEILLANCEREUIREMENTS4.6.4.3ThlDISshallbedemonstratedOPERABLE:Atleastonceperrefuelingoutagebyenergizingthesupply.breakersandverifyingthatnomorethanoneigniterpergroupisnotenergized.Igniter*groupsareshowninTable3.6-lAb.c~Verifyingbyvisualinspectionthatthereisnoloosedebrisinthevicinityoftheigniters.Energizingeachigniterandverifying.asurfacetemperatureof]5OOoForgreaterbyvisualobservation.'

Table.3.6-1ADistributedInitionSstemLocationNo.ofInitersPerTrainPerGroufl.UerVolumeIniterGrousa.Phase1b.Phase2c.Phase36.52.LowerVolumeIniterGrousa.Phase;1b.Phase2c.Phase'3D5 rI'SuestedAdditiontoBasesSection3/4.6.4TheDistributedIgnitionSystem(DIS)is'esignedtoprovideadditionalhydrogencontrolcapabilityintheunlikelyeventofadegradedcorecoolingeventinvolvingthegenerationofamountsofhydrogeninexcessofthatspecifiedinTOCFR50.44.Theoperabilityofthespecifiednumberofigniterswillmaintainaneffectivecoveragethroughoutthecon-tainmentandwillensurecombustionofleanhydrogen-air-steammixturesinacontrolledmannerasthehydrogenisreleased;therebyprecludingthepotentialaccumulationofhydrogenandignitionathighconcentrationbyarandomignitionsource.4L