ML17331A739

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
Issue date:	05/29/1981
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17331A738	List: ML17331A737 ML17331A739
References
NUDOCS 8106030207
Download: ML17331A739 (4)

Text

DONALDC.COOKNUCLEARPLANTUNITNOS.1AND2ATTACHMENT NO.2TOAEP:NRC:00500C CONTAINMENT SYSTEMSHYDROGEN.

CONTROLINTERIMDISTRIBUTED IGNITIONSYSTEMLIMITINGCONDITION FOROPERATION 3.6.4.3.TwotrainsoftheDistributed'Ignition System(DIS)shallbeoperable.

APPLICABILITY:

Modes1and2ACTIONWiththeDISinoperable, restorethesystemtoOPERABLEstatuswithin7daysorbeinHOTSTANDBYwithinthenext6hours.SURVEILLANCE REUIREMENTS 4.6.4.3ThlDISshallbedemonstrated OPERABLE:

Atleastonceperrefueling outagebyenergizing thesupply.breakersandverifying thatnomorethanoneigniterpergroupisnotenergized.

Igniter*groups areshowninTable3.6-lAb.c~Verifying byvisualinspection thatthereisnoloosedebrisinthevicinityoftheigniters.

Energizing eachigniterandverifying.a surfacetemperature of]5OOoForgreaterbyvisualobservation.'

Table.3.6-1ADistributed InitionSstemLocationNo.ofInitersPerTrainPerGroufl.UerVolumeIniterGrousa.Phase1b.Phase2c.Phase36.52.LowerVolumeIniterGrousa.Phase;1b.Phase2c.Phase'3D5 rI'SuestedAdditiontoBasesSection3/4.6.4TheDistributed IgnitionSystem(DIS)is'esigned toprovideadditional hydrogencontrolcapability intheunlikelyeventofadegradedcorecoolingeventinvolving thegeneration ofamountsofhydrogeninexcessofthatspecified inTOCFR50.44.Theoperability ofthespecified numberofigniterswillmaintainaneffective coveragethroughout thecon-tainmentandwillensurecombustion ofleanhydrogen-air-steam mixturesinacontrolled mannerasthehydrogenisreleased; therebyprecluding thepotential accumulation ofhydrogenandignitionathighconcentration byarandomignitionsource.4L