Rept Re Limitorque Valve Operator Test for Meeting General Requirements of Electrical Valve Actuator in Nuclear Reactor Containment Environ.Prepared by Philadelphia Gear Corp| ML17053A853 |
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| Site: |
Nine Mile Point  |
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| Issue date: |
01/02/1969 |
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| From: |
FRANKLIN INSTITUTE |
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| Shared Package |
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| ML17053A854 |
List: |
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| References |
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| NUDOCS 7907300160 |
| Download: ML17053A853 (16) |
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Category:TECHNICAL SPECIFICATIONS & TEST REPORTS
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[Table view]
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Rept Re Limitorque Valve Operator Test for Meeting General Requirements of Electrical Valve Actuator in Nuclear Reactor Containment Environ.Prepared by Philadelphia Gear Corp
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Rept of Test on Philadelphia Gear Corp SMBO-15 Limitorque. Prepared by Lockheed Electronics Co
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[Table view] |
Text
~~L4~PHILADELPHIA GEARCORPORATION KINGOFPRUSSIA,PENN.19406LIMITORQUE VALVECONTROLTESTOFLIMITORQUE'ALVE OPERATOR.TOMEETGENERALREQUIREMENTS OFANELECTRICVALVEACTUATORINNUCLEARREACTORCONTAINMENT ENVIRONMENT TESTREPORT3'ANUARY2,1969sooEGG~gogS
TESTREPORT-JANUARY2,1969ENGINEERING ORDERNO.600198TheLimitorque valveoperatortestedwasModelSMB-0witha15foot:pound,3phase,60cycle,440voltmotor,w~ithseg~~ightemperature motorinsulation andhightemperature resistant non-\,e~r~~~~Wmetalliccomponents, towithstand the~contemplated steampressure, hightemperature andchemicalconditions expected.in.theeventofanuclearreactorfailure.within.the,.containment vessel.TheLimitorque.
operatorwaswiredforatorqueseatingcontrolforclosingdirection andpositionlimitingcontrolforopendirection.
'IA23/8"diameterby1/4"pitch,1/4"lead,lefthandstemwasusedtosimulatethestemofavalvebeingopenedandclosedThespeedofoperation wasapproximately 6"perminuteovera12"travel.LThedesignedseatingthrusttobeexertedonthe.stembytheLimitorque valvecontrolwas16,500poundsofthrustintheclosedpositionofthevalvestem.Aslidewireelectricpositiontrans-mitter.wasalsoinstalled andconnected toaremotepositionreceiveroutsidethetestchamber.TESTSTOBEPERFORMED ONOPERATOR1.Preliminary heattestsoncomponent parts.2.Preliminary heattestsonactuator.
3.Preliminary livesteamtestonactuator.
4.Heatagingtestofelectricmotorandelectricmotorwithbrake.
5.Shockandvibration testofactuatortosimulateseismicconditions.
6.l50lifecycletestofactuatorproducing approximately 16,500poundsofthrust.7',TestofLimitorque valveoperatorandelectricbrakemotorunderasimulated reactorcontainment post-accident steamandchemicalenvironment.
l.PRELIMINARY HEATTESTSONCOMPONENT PARTSThestandardLimitorque operatorgearedlimitswitchandtorqueswitchwassubjected toadryheattestforapproxi-mately16hoursatatemperature of375'F.Periodically duringthistest,theswitcheswereremovedfromtheovenandactuatedbyhand.Theoperation wassatisfactory andnomal-'unctions occurred.
Allpartsfunctioned freelyandtherewasnobinding,jamming,norabnormaldistortion of.parts.Thetestwassuccessful inallrespects.
2.~PRELIMINARY HEATTESTSONACTUATORAcompletely assembled andoperational Limitorque operatorwasplaced.inanovenwherethetemperature wasmaintained atapproximately 325'F.foradurationof12hours.Theunitwaselectrically operatedeverythirtyminutesforaperiodofapproximately twominutespercycleandusingthegearedlimitswitchestostoptheactuatoratthefullopenandfullclosedpositionoftravel.Indicating lightcircuitswerealsowired.tothegearedlimitswitches.
Thetestwassuccessful ineveryrespect.Therewerenomalfunctions oftheoperatoranduponinspection ofthecom--ponen'tpartsused,therewasnonoticeable deterioration orwear.Thelubricant usedinhegearedlimitswitchdidbecomehardandcaked,howeverthelubricant usedintheLimitorque
gearhousingremainedpliableandhaditsoriginalconsistency.
Itwasdetermined thatthegreaseinthegearedlimitswitchgearhousingshouldbechangedtothesamegreaseasintheLimitorque operatorgearhousing.3'..PRELIMINARY LIVESTEPSTESTONACTUATOR~AcompleteLimitorque actuatorwassetupforelectrical operation andlivesteamwaspipedintotheconduittapsonthetopofthelimitswitchcompartment.
Oneofthebottomconduittapswasleftopentodrainoffanycondensate.
Theoperatorwassetuponatimerbasisforoperation overaperiodofapproximately ninehoursandoperating everythirtyminutesfortwominutespercycle.Duringthistest,thelivesteamintheswitchcompartment seemedtohavenoeffectwhateveronthefunctionofthe.limitswitchesin'heircontroloftheoperatoratthefull.openandfullclosedpositionoftravel.Inaddition, thelimitswitcheswerewireduptoindicating lightswhichoperatedsatisfactorily.
Thetestwassuccessful andtherewasnonoticeable effectonthefunctionofanyofthepartsinthelimitswitchcom-partment.
4.HEATAGINGTEST.OFELECTRICMOTORANDELECTRICMOTORWITHBRAKETheelectricmotorfortheLimitorque operatortobeusedintheenvironment testandanotherelectricmotorequippedwithadisktypebrakeweresub'jected toaheatagingtest.
BothelectricmotorsweresenttoReliance, ElectricCo.forheatagetesting.Thistestconsisted ofbakingthemotorsatatemperature of180'C.foratotalof100hourstosimulateagingthemotortoa40yearlifeexpectancy.
Motorinsulation checkswere.madeandfound.to.bewithinnormallimits.There.werenoadverseeffectsonthemotorsandmotorinsulation resi'stance measured'infinity toground.5..SHOCKANDVIBRATION TESTOFACTUATORTOSIMULATESEISMICCONDITIONS TheLimitorque operatortobeusedintheenvironment testwasshippedcompletetotheLockheedElectronics Co.,inPlain-.field,NewJersey,forshockandvibration testingtosimulateseismicconditions.
Acopyofthisreportisenclosedherewith.
Thetestbasically consisted ofmountingtheLimitorque operatoronashockandvibration tabletotestitat'20cyclespersecondvibration at.1Gloadforaperiodoftwominutesononeminuteoff.Thiswouldconstitute onecycle.Thecyclewasrepeatedfivetimesinboththeverticalandhorizontal axisoftheoperator.
Theactualtestreportandphotographs areincludedhere.Thetestwassuccessful andtherewasnonoticeable effectwhatsoever ontheLimitorque operator.
,~~~6~150LIFECYCLETESTOFLIMITORQUE OPERATORPRODUCING APPROXIMATELY 16,500POUNDSTHRUSTTheLimitorque operatorwasshippedtotheFranklinInstitute ResearchLaboratories, Philadelphia, Pennsylvania.
Theoperatorwasmountedonastandinsidethetestchamberanda150cycleloadtestwasmadeontheunit.Thistestconsisted ofstrokingthe23/8"diametervalvestematotalofapproximately 12inchesintwominutes.Thevalvesteminthefullclosedpositionproducedathrustof16,500poundsonarigidplatesecurelyboltedtothetestchamber.Thethrustwasmeasuredbythesamestrain-gauge recording instru-mentusedintheactualenvironmental testconducted bytheFranklinInstitute.
Theunitwaswiredupsothattheclosing(y.direction andtheopenpositiongearedlimitswitchstoppedtheunitinthefullopenposition.
Thespeedof.travelwas6inchesperminute.Afterthelifecycletestingwascompleted, theunitwasinspected and-foundtobeinexcellent condition.
Therewasnonoticeable wearonanyoftheparts.ThesameelectricImotorwhichhadbeenheatagetestedatRelianceElectricCo.wasusedforthislifeCycletest.Therewasnonoticeable adverseeffectontheelectricmotorandit.functioned properly.
7.TESTOFLIMITORQUE VALVEOPERATORUNDERSIMULATED
'REACTORCONTAINMENT POST-ACCIDENT STEAMANDCHEMICALENVIRONMENT TheattachedreportoftheFranklinInstitute ResearchLaboratories describes theactualtestingunderthisenviron-
wmentalcondition.
Afterthetest.wascompleted, theLimitorque operatorwasshippedbacktoPhiladelphia GearCorporation, KingofPrussia,'ennsylvania whereitwasdisassembled andall.partswereinspected.'hotographs areincludedshowingthevarious-partsoftheoperator.
Allparts,including theelectricmotor,slidewereposition'ransmitter,.
seals,bearings, gears,andshafts,wereinspected andnonoticeable wearwasnoted.However,thegearframe.ofthegearedlimit.switchhadcorrodedandcausedaminorfailure.Thegearedlimitswitchframehadbeenattackedbytheboricacidinthesteamatmosphere.
Thiscausedthegearframetocorrodeand..resulted inbinding,upoftheshaftsofthegearedlimitswitchwheretheyextendthroughthegearedlimitswitchhousing.Thiscausedthemalfunction oftheswitchasdescribed intheFranklinInstitute ResearchLabor-atories'eport.
Amaterialchangehasbeeninstituted tocorrectthiscorrosive actionofthematerialusedinthatparticular switch.Onallpresent'ordersbeingprocessed, andonallfutureunitstobeshippedtomeetenvironmental conditions suchasthis,thegearframehousingofthegeared'limitswitchwillbeabronzematerialwhichisnotsubjectltocorrosion byboricacidsolutions.
Themotorinsulation resistance afteralltestingwas1,000megohmsacrossall'threemotorterminals togroundat500volts.