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| {{#Wiki_filter:ATTACMMENT 1DesignAnalysisOperability Evaluation for857A/B/CGinnaStationRochester GasandElectricCorporation 89EastAvenueRochester, NewYork14649DA-ME-96-096 Revision0September 20,1996Preparedby:~~DesignEngieer9p~9j,DateReviewedby:Independent orLeadEngineerDateTECHNICAL INPUTFORMEIN857A857B857CKEYWORDSCROSSREFPSSL03COMMENTMOV0erabilitNonePROPRIETARY OTHR5111NoneYESNOXSUPERSEDES NonePage1960'F270297 960924PDRADQCK05000244VDa' REVISINTATUHEETRevisionNumberAffectedSectionsDescritionofRevision0all"initialdocumentDesignAnalysisDA-ME-96-096 PageiiRevision0 | | {{#Wiki_filter:ATTACMMENT 1 Design Analysis Operability Evaluation for 857 A/B/C Ginna Station Rochester Gas and Electric Corporation 89 East Avenue Rochester, New York 14649 DA-ME-96-096 Revision 0 September 20, 1996 Prepared by:~~Design Engi eer 9p~9j, Date Reviewed by: Independent or Lead Engineer Date TECHNICAL INPUT FORM EIN 857A 857B 857C KEYWORDS CROSS REF PSSL 03 COMMENT MOV 0 erabilit None PROPRIETARY OTH R 5111 None YES NO X SUPERSEDES NonePage 1 960'F270297 960924 PDR ADQCK 05000244 VDa' REVISI N TATU HEET Revision Number Affected Sections Descri tion of Revision 0 all" initial document Design Analysis DA-ME-96-096 Page ii Revision 0 |
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| OBJECTIVE | | OBJECTIVE 2.0 To evaluate the operability of RHR system valves 857 A/B/C.Valve Bonnet pressure locking forces will be considered in this operability evaluation. |
| | CONCLUSIONS 2~1 2.2 2.3 2,4 2.4'1 3.2 3.3 3.4 3.5 3.6 3'The total Required Thrust to open the 857 valves was determined to be 8759 lbs.This considers valve bonnet pressure locking conditions. |
| | The minimum Available Thrust based upon In-situ Motor/Actuator capacity testing is 9456 lbs.Valves 857 A/B/C are considered operable since the available thrust exceeds the required thrust.The Total Required Thrust of 8759 lbs.does not exceed the weaklink limit thrust of 9027 lbs.Conservatisms associated with this analysis are discussed in Section 8.5.These conservatisms would add additional margin, between the available thrust and the required thrust to open the subject valves.Therefore this analysis is considered bounding.DESIGN INPUTS Design Criteria, EWR 5111, Revision 1.RG&E/MOVATS Static Diagnostic Test Package, MOV 857A, (M-64.1.2), dated 4/2/92.RG&E/MOVATS Static Diagnostic Test Package, (M-64.1.2), MOV-857A, dated 4/26/96.RG&E/MOVATS Static Diagnostic Test Package, (M-64.1.2), MOV-857B, dated 4/30/96.RG&E/MOVATS Static Diagnostic Test Package, (M-64.1.2), MOV-857C, dated 4/29/96.RG&E/MOVATS Diagnostic Test Package PT-50.19, (DP Test), 857A, Dynamic test dated 3/22/93, Static Test dated 4/2/92.RG&E/MOVATS Diagnostic Test Package PT-50.19, (DP Test), 857B, Dynamic Test dated 4/4/92, Static Test dated 4/4/92.Design Analysis DA-ME-96-096 Page 3 Revision 0 Date 9 19 96 3.9 3.10 3.11 3.12 3.13 3.14 4.0 4.1 6.0 RG&E/MOVATS Diagnostic Test Package PT-50.19 (DP Test), 857C, Dynamic Test dated 3/21/93, Static Test dated 4/3/92.RG&E MOV Thrust Calculation, 857A, dated 3/8/96.RG&E MOV Thrust Calculation, 857B, dated 3/8/96.RG&E MOV Thrust Calculation, 857C, dated 3/8/96.RG&E I/O J.E.Pacher to B.Flynn,"MOVs 857A, B, and C Voltages", dated 9/17/96.RG&E/MOVATS Diagnostic Test Package, PT-50.2, (DP Test), 860C, Dynamic Test dated 4/24/90, Static Test Date 3/19/93.Anchor/Darling letter, C.J.Bower to S.Greer, P.O.AP0-96190-1, Rev.0, dated 9/19/96.REFERENCES Altran Calculation No.94108-C-1, Rev.0, dated 11/1/94.ASSUMPTIONS None other than described in analysis.COMPUTER CODES 7.0 None ANALYSIS 7~1 7.1.1 7.1.2 7.1.3 The total required thrust (T~)to lift 857 A/B/C off the seat during its safety-related condition will be calculated utilizing the methodology of Reference 4.1.I The total required thrust will include bonnet pressure locking forces.This calculation will reflect the latest available information regarding the 857 A/B/C valves.The calculated total required thrust will be compared to the test-determined available thrust (T)for the purposes of an operability assessment. |
| | Design Analysis DA-ME-96-096 Page 4 Revision 0 Date 9 19 96 Total Required Thrust (T): Stem Differential Pressure Load (F,~): Stem Area (A~)=nD 4 D;-Stem Diameter=1.375" (Design Inputs 3.9, 3.10, 3.11)4 F~=PqA, where P~=Bonnet Pressure (614.7 psi)7.2.2 F,~=(614.7)(1.48) |
| | =913 lbs.Stem Disc Wei ht Force Fg: F=50 lbs.Note: This is conservative since the weight of the disc/stem assembly is assumed to be 50 lbs, per Ref.4.1;Actual Field weight measurement of spare disc/stem assembly was found to be 26 lbs.7.2.3~~Sealin Load F From Design Inputs 3.3, 3.4, and 3.5 the measured sealing loads (indicated as"unseating thrust-open direction") |
| | for the 857 A/B/C valves are as follows: Valve Measured F 857A 857B 857C 586 lbs.769.8 lbs.769 lbs.7.2.4.'.Bounding F~is 770 lbs.Packing Friction Load (Fpp): From Design Inputs 3.3, 3.4, 3.5, 3.6, 3.7, and 3.8 the Measured Packing Friction loads (indicated as"Running Thrust-open direction") |
| | for the 857 A/B/C valves are as follows: Design Analysis DA-ME-96-096 Page 5 Revision 0 |
|
| |
|
| ==2.0 Toevaluatetheoperability==
| | Valve Measured Fpp 3.3 3.4 3.5 Measured Fpp 3.6 3.7 3.8 857A 857B 857C 247 lbs.498 lbs.513 lbs.535 450 400 7.2.5.'.A conservative Bounding F~=550 lbs, is used.Disc Differential Pressure Load (FDp): Disc Area (A~)=mDD 4 where DD=Disc Mean Seat Diameter, From Design Input 3.14, and Field Measurement; Dp 4'" Ap=~pp 4.5'15.9 inp 4 Fpp=i 2'g PUs PDpiAAp cos(qh)+@sin(p)where: P~=Bonnet Pressure=614.7 psi P=Upstream Pressure=147 psi (RHR Pump Side)P~=Downstream Pressure=2.9 psi (Rx side)p=Disc Seat Angle=0'Parallel Disc Gate Valve)p=Friction Coefficient |
| ofRHRsystemvalves857A/B/C.ValveBonnetpressurelockingforceswillbeconsidered inthisoperability evaluation.
| | =0.5 (see below)p=0.5 Based upon Measured Valve Factors per Design Inputs 3.6, 3.7, and 3.8 and qb=0'therefore, p=valve factor): Valve 857A 857B 857C p (open direction) 1.18 (see note below)0.356 0.469 Design Analysis DA-ME-96-096 Page 6 Revision 0 Note: p=0.5 is bounding for 857 B/C, the data obtained from'A'alve was indicated to be suspect (based upon a low Dp used and no use of a Torque Thrust Cell).This value will be reverified during future MOV testing.Design Inputs 3.6, 3.7, and 3.8 reflect the above valve factors which are based upon a nominal seat diameter of 4.0>>(yielding an area of 12.566 in).These valve factors do not consider the stem rejection force or the torque reaction factor.If the valve factors are adjusted for a mean seat diameter of 4.5>>(Design Input 3.14), and the stem rejection force and torque reaction factor are included, the adjusted Valve Factor values would be lower, thus further enveloping the 0.5 value.FDp 2 614 7 147 2~9 0~5 15 9 cos (0)+(0.5)(sin 0)7.2.6 FDp=8582 lbs.Tor ue Reaction Factor T~g: DD TRp=1-(2.5.0151)(12)4 5>>TRp=0.96 where: F,=Stem Factor taken as 0.0151 ft (based upon conservative use of 0.2 for coefficient of friction)7.2.7 Total Required Force (TR): Reference 4.1 utilizes the following equation to calculate the total force required to open the valves: TR F+Fpp F+Fop~+F Design Analysis DA-ME-96-096 Page 7 Revision 0 |
| CONCLUSIONS 2~12.22.32,42.4'13.23.33.43.53.63'ThetotalRequiredThrusttoopenthe857valveswasdetermined tobe8759lbs.Thisconsiders valvebonnetpressurelockingconditions.
| |
| TheminimumAvailable ThrustbaseduponIn-situMotor/Actuator capacitytestingis9456lbs.Valves857A/B/Careconsidered operablesincetheavailable thrustexceedstherequiredthrust.TheTotalRequiredThrustof8759lbs.doesnotexceedtheweaklinklimitthrustof9027lbs.Conservatisms associated withthisanalysisarediscussed inSection8.5.Theseconservatisms wouldaddadditional margin,betweentheavailable thrustandtherequiredthrusttoopenthesubjectvalves.Therefore thisanalysisisconsidered bounding.
| |
| DESIGNINPUTSDesignCriteria, EWR5111,Revision1.RG&E/MOVATS StaticDiagnostic TestPackage,MOV857A,(M-64.1.2),
| |
| dated4/2/92.RG&E/MOVATS StaticDiagnostic TestPackage,(M-64.1.2),
| |
| MOV-857A, dated4/26/96.RG&E/MOVATS StaticDiagnostic TestPackage,(M-64.1.2),MOV-857B, dated4/30/96.RG&E/MOVATS StaticDiagnostic TestPackage,(M-64.1.2),
| |
| MOV-857C, dated4/29/96.RG&E/MOVATS Diagnostic TestPackagePT-50.19, (DPTest),857A,Dynamictestdated3/22/93,StaticTestdated4/2/92.RG&E/MOVATS Diagnostic TestPackagePT-50.19, (DPTest),857B,DynamicTestdated4/4/92,StaticTestdated4/4/92.DesignAnalysisDA-ME-96-096 Page3Revision0Date91996 3.93.103.113.123.133.144.04.16.0RG&E/MOVATS Diagnostic TestPackagePT-50.19(DPTest),857C,DynamicTestdated3/21/93,StaticTestdated4/3/92.RG&EMOVThrustCalculation, 857A,dated3/8/96.RG&EMOVThrustCalculation, 857B,dated3/8/96.RG&EMOVThrustCalculation, 857C,dated3/8/96.RG&EI/OJ.E.PachertoB.Flynn,"MOVs857A,B,andCVoltages",
| |
| dated9/17/96.RG&E/MOVATS Diagnostic TestPackage,PT-50.2,(DPTest),860C,DynamicTestdated4/24/90,StaticTestDate3/19/93.Anchor/Darling letter,C.J.BowertoS.Greer,P.O.AP0-96190-1, Rev.0,dated9/19/96.REFERENCES AltranCalculation No.94108-C-1, Rev.0,dated11/1/94.ASSUMPTIONS Noneotherthandescribed inanalysis.
| |
| COMPUTERCODES7.0NoneANALYSIS7~17.1.17.1.27.1.3Thetotalrequiredthrust(T~)tolift857A/B/Cofftheseatduringitssafety-related condition willbecalculated utilizing themethodology ofReference 4.1.IThetotalrequiredthrustwillincludebonnetpressurelockingforces.Thiscalculation willreflectthelatestavailable information regarding the857A/B/Cvalves.Thecalculated totalrequiredthrustwillbecomparedtothetest-determined available thrust(T)forthepurposesofanoperability assessment.
| |
| DesignAnalysisDA-ME-96-096 Page4Revision0Date91996 TotalRequiredThrust(T):StemDifferential PressureLoad(F,~):StemArea(A~)=nD4D;-StemDiameter=
| |
| 1.375"(DesignInputs3.9,3.10,3.11)4F~=PqA,whereP~=BonnetPressure(614.7psi)7.2.2F,~=(614.7)(1.48)
| |
| =913lbs.StemDiscWeihtForceFg:F=50lbs.Note:Thisisconservative sincetheweightofthedisc/stem assemblyisassumedtobe50lbs,perRef.4.1;ActualFieldweightmeasurement ofsparedisc/stem assemblywasfoundtobe26lbs.7.2.3~~SealinLoadFFromDesignInputs3.3,3.4,and3.5themeasuredsealingloads(indicated as"unseating thrust-opendirection") | |
| forthe857A/B/Cvalvesareasfollows:ValveMeasuredF857A857B857C586lbs.769.8lbs.769lbs.7.2.4.'.BoundingF~is770lbs.PackingFrictionLoad(Fpp):FromDesignInputs3.3,3.4,3.5,3.6,3.7,and3.8theMeasuredPackingFrictionloads(indicated as"RunningThrust-opendirection")
| |
| forthe857A/B/Cvalvesareasfollows:DesignAnalysisDA-ME-96-096 Page5Revision0
| |
|
| |
|
| ValveMeasuredFpp3.33.43.5MeasuredFpp3.63.73.8857A857B857C247lbs.498lbs.513lbs.5354504007.2.5.'.Aconservative BoundingF~=550lbs,isused.DiscDifferential PressureLoad(FDp):DiscArea(A~)=mDD4whereDD=DiscMeanSeatDiameter, FromDesignInput3.14,andFieldMeasurement; Dp4'"Ap=~pp4.5'15.9inp4Fpp=i2'gPUsPDpiAApcos(qh)+@sin(p)where:P~=BonnetPressure=614.7psiP=UpstreamPressure=147psi(RHRPumpSide)P~=Downstream Pressure=2.9psi(Rxside)p=DiscSeatAngle=0'Parallel DiscGateValve)p=FrictionCoefficient
| | The methodology of Reference 4.1 is very conservative, in that the Disc/Stem assembly weight load and the Packing Load are included in the calculation of total required thrust by the above equation, when in actuality these loads are already included in the unseating load (F,~).The second conservatism in this methodology is that the unseating force (F...q)is a measured value which already considers the Torque Reaction Factor (T~).Removing these two conservatisms results in a calculated required thrust of: Tg=(-913+8582)+770.96 7.3 TR=8759 lbs.Available Thrust (T)Available Thrust is obtained from In-situ motor/actuator capacity tests.From Design Input 3.2 the 1004 voltage thrust capacity was measured to be 10,832 lbs.Note: An in-situ motor/actuator capacity test, was also performed on valve 860B.The 860's are 6" x 4" x 6" Anchor Darling Parallel disc gate valves with SMB-00-7.5 actuators and are identical to the 857's.Per Design Input 3.13, the available thrust was measured to be 11,016 (at 1004 voltage, no reduction for temp.effects).Since this value is greater than the 857 value of 10,832 lbs, 10,832 lbs.will be used to be conservative. |
| =0.5(seebelow)p=0.5BaseduponMeasuredValveFactorsperDesignInputs3.6,3.7,and3.8andqb=0'therefore, p=valvefactor):Valve857A857B857Cp(opendirection) 1.18(seenotebelow)0.3560.469DesignAnalysisDA-ME-96-096 Page6Revision0 Note:p=0.5isboundingfor857B/C,thedataobtainedfrom'A'alvewasindicated tobesuspect(baseduponalowDpusedandnouseofaTorqueThrustCell).Thisvaluewillbereverified duringfutureMOVtesting.DesignInputs3.6,3.7,and3.8reflecttheabovevalvefactorswhicharebaseduponanominalseatdiameterof4.0>>(yielding anareaof12.566in).Thesevalvefactorsdonotconsiderthestemrejection forceorthetorquereactionfactor.Ifthevalvefactorsareadjustedforameanseatdiameterof4.5>>(DesignInput3.14),andthestemrejection forceandtorquereactionfactorareincluded, theadjustedValveFactorvalueswouldbelower,thusfurtherenveloping the0.5value.FDp261471472~90~5159cos(0)+(0.5)(sin0)7.2.6FDp=8582lbs.TorueReactionFactorT~g:DDTRp=1-(2.5.0151)(12)45>>TRp=0.96where:F,=StemFactortakenas0.0151ft(baseduponconservative useof0.2forcoefficient offriction) 7.2.7TotalRequiredForce(TR):Reference 4.1utilizesthefollowing equationtocalculate thetotalforcerequiredtoopenthevalves:TRF+FppF+Fop~+FDesignAnalysisDA-ME-96-096 Page7Revision0
| | It should also be noted that these type of tests are not performed under complete motor stall conditions.. |
| | Therefore, there would be some additional thrust available. |
| | The In-situ Motor/Actuator capacity tests include consideration of stem factor.As was previously indicated, the 10,832 lb.thrust used for this analysis was for the 857A valve.The following stem factors are obtained from Design Inputs 3.6, 3.7, and 3.8 as follows (Note: these are for Design Analysis DA-ME-96-096 Page 8 Revision 0 |
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| Themethodology ofReference 4.1isveryconservative, inthattheDisc/Stem assemblyweightloadandthePackingLoadareincludedinthecalculation oftotalrequiredthrustbytheaboveequation, wheninactuality theseloadsarealreadyincludedintheunseating load(F,~).Thesecondconservatism inthismethodology isthattheunseating force(F...q)isameasuredvaluewhichalreadyconsiders theTorqueReactionFactor(T~).Removingthesetwoconservatisms resultsinacalculated requiredthrustof:Tg=(-913+8582)+770.967.3TR=8759lbs.Available Thrust(T)Available ThrustisobtainedfromIn-situmotor/actuator capacitytests.FromDesignInput3.2the1004voltagethrustcapacitywasmeasuredtobe10,832lbs.Note:Anin-situmotor/actuator capacitytest,wasalsoperformed onvalve860B.The860'sare6"x4"x6"AnchorDarlingParalleldiscgatevalveswithSMB-00-7.5 actuators andareidentical tothe857's.PerDesignInput3.13,theavailable thrustwasmeasuredtobe11,016(at1004voltage,noreduction fortemp.effects).
| | closed direction only, no accurate data for open direction is available): |
| Sincethisvalueisgreaterthanthe857valueof10,832lbs,10,832lbs.willbeusedtobeconservative.
| | Valve Closed Stem Factor 857A 857B 857C*0.0117 0.0107 0.0089 7.3.1 The'A'alve has the highest measured stem factor in the closed direction. |
| Itshouldalsobenotedthatthesetypeoftestsarenotperformed undercompletemotorstallconditions..
| | It will be assumed that it also has the highest stem factor for the open direction. |
| Therefore, therewouldbesomeadditional thrustavailable. | | Therefore, there is no reason to adjust the 10,832 lb.value by the ratio of the stem factors.From Section 7.2.4 add minimum running load (conservative) to calculate thrust available at control switch trip: 7.3.2 Tp ([gpss)10'32+247 1 1 g 079 lbs.Reduction for equipment error (from Design Input 3.3, Section 4): 7.3.3 Eg 5~744'1 1 g 079)+240 lbs~ER=876 lbs.Tp 1 1 g 079 876 10 g 203 lbs.Consider Reduced Voltage and temperature effects R=974 (conservative minimum from Design Input 3.12 for 857A)From Design Inputs 3.9, 3.10, and 3.11 the temperature effect reduction is 1.5%.Final Available Thrust per In-situ Motor/Actuator capacity test: T~10'03 (~97)(~985)7.4.'.T=9456 lbs.Acceptability (Operability) |
| TheIn-situMotor/Actuator capacitytestsincludeconsideration ofstemfactor.Aswaspreviously indicated, the10,832lb.thrustusedforthisanalysiswasforthe857Avalve.Thefollowing stemfactorsareobtainedfromDesignInputs3.6,3.7,and3.8asfollows(Note:theseareforDesignAnalysisDA-ME-96-096 Page8Revision0
| | T=9456 lbs.>T~=8759 lbs.Design Analysis DA-ME-96-096 Page 9 Revision 0 |
| | .'.Since the available thrust from previous in-situ motor/actuator capacity tests;considering equipment error, applicable reduced voltage and temperature effects considerations is greater than the calculated required thrust to unseat the valve (including bonnet pressure locking loads), the 857 A/B/C valves are considered operable.Note: Per Reference 4.1 the limiting weaklink thrust value was indicated to be 9027 lbs.Since 8759 lbs.<9027 lbs.the weaklink limit will not be exceeded for the subject valves.8.0 RESULTS 8.1 The total Required Thrust to open the 857 valves was determined to be 8759 lbs.This considers valve bonnet pressure locking conditions. |
| | 8.2 The minimum Avail'able Thrust based upon In-situ Motor/Actuator capacity testing was determined to be 9456 lbs.8.38.4 8.5 Valves 857 A/B/C are considered operable since the available thrust exceeds the required thrust.The Required Thrust of 8759 lbs.does not exceed the weaklink limit of 9027 lbs for the subject valves.Conservatisms associated with this analysis which make it bounding, are as follows: 8.5.1 The in-situ motor/actuator capacity tests, performd on two valves out of the affected group, were not taken out to complete 1004 stall conditions. |
| | Therefore, it can be assumed that some additional thrust would be available. |
| | 8.5.2 The minimum running load measured for all valves from all current as-left available tests, was used to determine the 100%voltage available thrust.This results in an overall=lower available thrust for comparison. |
| | 8.5.3 In terms of a reduced voltage, the minimum for all valves and a slightly conservative value was used.This results in an overall lower available thrust for comparison. |
| | Design Analysis~~DA-ME-9 6-0,9 6 Page 10 Revision 0 |
|
| |
|
| closeddirection only,noaccuratedataforopendirection isavailable):
| | 8.5.4~~The maximum sealing load from all valves was utilized.This yields a conservative calculated total required thrust.Design Analysis DA-ME-96-096 Page 11 Revision 0 Date 9 19 96 n}} |
| ValveClosedStemFactor857A857B857C*0.01170.01070.00897.3.1The'A'alvehasthehighestmeasuredstemfactorinthecloseddirection.
| |
| Itwillbeassumedthatitalsohasthehigheststemfactorfortheopendirection.
| |
| Therefore, thereisnoreasontoadjustthe10,832lb.valuebytheratioofthestemfactors.FromSection7.2.4addminimumrunningload(conservative) tocalculate thrustavailable atcontrolswitchtrip:7.3.2Tp([gpss)10'32+24711g079lbs.Reduction forequipment error(fromDesignInput3.3,Section4):7.3.3Eg5~744'11g079)+240lbs~ER=876lbs.Tp11g07987610g203lbs.ConsiderReducedVoltageandtemperature effectsR=974(conservative minimumfromDesignInput3.12for857A)FromDesignInputs3.9,3.10,and3.11thetemperature effectreduction is1.5%.FinalAvailable ThrustperIn-situMotor/Actuator capacitytest:T~10'03(~97)(~985)7.4.'.T=9456lbs.Acceptability (Operability)
| |
| T=9456lbs.>T~=8759lbs.DesignAnalysisDA-ME-96-096 Page9Revision0
| |
| .'.Sincetheavailable thrustfrompreviousin-situmotor/actuator capacitytests;considering equipment error,applicable reducedvoltageandtemperature effectsconsiderations isgreaterthanthecalculated requiredthrusttounseatthevalve(including bonnetpressurelockingloads),the857A/B/Cvalvesareconsidered operable.
| |
| Note:PerReference 4.1thelimitingweaklinkthrustvaluewasindicated tobe9027lbs.Since8759lbs.<9027lbs.theweaklinklimitwillnotbeexceededforthesubjectvalves.8.0RESULTS8.1ThetotalRequiredThrusttoopenthe857valveswasdetermined tobe8759lbs.Thisconsiders valvebonnetpressurelockingconditions.
| |
| 8.2TheminimumAvail'able ThrustbaseduponIn-situMotor/Actuator capacitytestingwasdetermined tobe9456lbs.8.38.48.5Valves857A/B/Careconsidered operablesincetheavailable thrustexceedstherequiredthrust.TheRequiredThrustof8759lbs.doesnotexceedtheweaklinklimitof9027lbsforthesubjectvalves.Conservatisms associated withthisanalysiswhichmakeitbounding, areasfollows:8.5.1Thein-situmotor/actuator capacitytests,performdontwovalvesoutoftheaffectedgroup,werenottakenouttocomplete1004stallconditions.
| |
| Therefore, itcanbeassumedthatsomeadditional thrustwouldbeavailable.
| |
| 8.5.2Theminimumrunningloadmeasuredforallvalvesfromallcurrentas-leftavailable tests,wasusedtodetermine the100%voltageavailable thrust.Thisresultsinanoverall=loweravailable thrustforcomparison.
| |
| 8.5.3Intermsofareducedvoltage,theminimumforallvalvesandaslightlyconservative valuewasused.Thisresultsinanoverallloweravailable thrustforcomparison.
| |
| DesignAnalysis~~DA-ME-96-0,96Page10Revision0
| |
| | |
| 8.5.4~~Themaximumsealingloadfromallvalveswasutilized.
| |
| Thisyieldsaconservative calculated totalrequiredthrust.DesignAnalysisDA-ME-96-096 Page11Revision0Date91996 n}}
| |
Rev 0 to Design Analysis Operability Evaluation for 857 A/B/C Ginna Station.| ML17264A610 |
| Person / Time |
|---|
| Site: |
Ginna  |
|---|
| Issue date: |
09/23/1996 |
|---|
| From: |
ROCHESTER GAS & ELECTRIC CORP. |
|---|
| To: |
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| Shared Package |
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| ML17264A608 |
List: |
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| References |
|---|
| DA-ME-96-096, DA-ME-96-096-R00, DA-ME-96-96, DA-ME-96-96-R, NUDOCS 9609270297 |
| Download: ML17264A610 (17) |
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ML17262B0831992-07-31031 July 1992
Recommended Info for Inclusion in Section 15.6.4 of FSAR for Re Ginna Nuclear Plant.
ML17262A8391992-04-30030 April 1992
Rev 0 to Summary Exam Rept for 1992 SG Eddy Current Insp at Re Ginna Nuclear Power Station.
ML17262A5601991-06-18018 June 1991
Rev 1 to Design Verification Ginna Station Containment Foundation Mat Analysis.
ML17262A4691991-04-25025 April 1991
Rev 0 Summary Exam Rept for 1991 Steam Generator Eddy Current Insp.
ML17262A4521991-04-22022 April 1991
Control Room Heatup Analysis.
ML17262A3781991-02-28028 February 1991
Nonproprietary Re Ginna Low Temp Overpressure Protection Sys Setpoint Phase II Evaluation, Final Rept
ML17262A4141991-02-26026 February 1991
Safety Analysis,Ginna Station Updated FSAR Section 6.2.4 & Tables 6.2-13,6.2-14 & 6.2-15 Changes.
ML17262A3681991-02-15015 February 1991
Simulation Facility Certification Rept.
ML17262A4431990-10-0404 October 1990
Rev 0 to Design Analysis Ginna Station Containment Mat Design Water Level Elevation 265 ft,0 Inches.
ML17262A4401990-10-0404 October 1990
Rev 0 to Design Verification Ginna Station Containment Foundation Mat Analysis.
ML17262A1931990-10-0303 October 1990
Rev 1 to Safety Analysis Ginna Station Updated FSAR Table 6.2-13 Changes.
ML17262A1761990-08-30030 August 1990
Voltage Simulation for Case EOF LOC4 LOCA Simulation for 50/50 Mode - Circuit 767 Details 12B Transformer Feeding Bus 12B.
ML17262A1771990-07-27027 July 1990
Rev 1 to Design Analysis EWR 4525-1, Fault Current Analysis of Power Distribution Sys.
ML17262A1781990-07-24024 July 1990
Rev 1 to Design Analysis EWR 4525-2, Adequacy of Electric Sys Voltages.
ML17250B1761990-05-0808 May 1990
Rev 1 Summary Exam Rept for 1990 Steam Generator Eddy Current Insp.
ML17261B0201990-03-14014 March 1990
Design Criteria Ginna Station Steam Generator Containment Penetration.
ML17251A4811989-02-28028 February 1989
Ultrasonic Indication Sizing Technique Development. Related Info Encl
ML17251A4771988-06-17017 June 1988
Rev 0 to Differential Pressure Thrust Calculation Methodology.
ML17261A6571987-10-31031 October 1987
Steam Generator Tube Plugging Increase Licensing Rept for Ginna Nuclear Power Station.
ML17261A5521987-07-14014 July 1987
Supplemental Rept to Dcrdr Final Summary Rept for Re Ginna Station.
ML17251A4741987-04-0101 April 1987
Rev 0 to Safety Analysis,Ginna Station PORV Block Valves.
ML17251A4721987-03-10010 March 1987
Rev 0 to Design Criteria,Ginna Station PORV Block Valves Replacement.
ML17251A9191986-12-18018 December 1986
Rev 0 to Implementation Rept EWR 2799, Reactor Vessel Level Monitoring Sys.
ML17251A6171986-03-0101 March 1986
1986 Steam Generator Eddy Current Exam Summary Rept.
ML17254A7031985-12-31031 December 1985
Vols 1 & 2 to Dcrdr Final Summary Rept Program Implementation,Re Ginna Nuclear Power Plant.
ML17254A6911985-12-16016 December 1985
Reinforced Masonry Wall Evaluation,Evaluation of Control Bldg Reinforced Walls.
1997-08-29
[Table view]
Category:TEXT-SAFETY REPORT
MONTHYEARML17265A7601999-10-0505 October 1999
Part 21 Rept Re W2 Switch Supplied by W Drawn from Stock, Did Not Operate Properly After Being Installed on 990409. Switch Returned to W on 990514 for Evaluation & Root Cause Analysis
ML17265A7621999-09-30030 September 1999
Monthly Operating Rept for Sept 1999 for Re Ginna Npp.With 991008 Ltr
ML17265A7531999-09-23023 September 1999
Part 21 Rept Re Corrective Action & Closeout of 10CFR21 Rept of Noncompliance Re Unacceptable Part for 30-4 Connector. Unacceptable Parts Removed from Stock & Scrapped
ML17265A7541999-09-22022 September 1999
LER 99-011-00:on 990823,small Tears Were Discovered in Flexible Duct Work Connector at Inlet of CR HVAC Sys Return Air Fan (AKF08).Caused by in-leakage Greater than That Assumed.Implemented Temporary Mod 99-029.With 990922 Ltr
ML17265A7471999-08-31031 August 1999
Monthly Operating Rept for Aug 1999 for Re Ginna Npp.With 990909 Ltr
ML17265A7431999-08-24024 August 1999
LER 99-004-01:on 990412,discovered That Containment Recirculation Fan Chevron Separator Vanes Were Installed Backwards.Caused by Improper Assembly by Mfg.Moisture Separator Vanes Were Dismantled & Correctly re-installed
ML17265A7341999-07-31031 July 1999
Monthly Operating Rept for July 1999 for Re Ginna Npp.With 990806 Ltr
ML17265A7291999-07-29029 July 1999
Interim Part 21 Rept Re safety-related DB-25 Breaker Mechanism Procured from W Did Not Pas Degradatin Checks When Drawn from Stock to Be Installed Into BUS15/03A.Holes Did Not line-up & Tripper Pan Bent
ML17265A7181999-07-23023 July 1999
LER 99-007-01:on 990423,reactor Trip Occurred Due to Instrument & Control Technicians Inadvertently Pulling Fuses from Wrong Nuclear Instrument Channel.Setpoint Adjustments Were Completed by Different Crew of Technicians
ML17265A7081999-07-22022 July 1999
LER 98-003-02:on 980904,actuations of CR Emergency Air Treatment Sys Was Noted Due to Invalid Causes.Caused by Various Degraded Components in CR RM Sys.Creats Actuation Signal Was Reset & Normal Ventilation Was Restored
ML17265A7131999-07-22022 July 1999
Special Rept:On 990407,radiation Monitor RM-14A Was Declared Inoperable.Caused by Failed Communication Link from TSC to Plant Process Computer Sys.Communication Link Was re-established & RM-14A Was Declaed Operable on 990521
ML17265A7031999-07-19019 July 1999
LER 99-S01-00:on 990617,determined That Temporary Unescorted Access Had Been Granted to Contractor Employee.Caused by Incomplete Info Re Circumstances of Individual Military Separation.Individual Access Was Revoked.With 990719 Ltr
ML17265A7211999-07-19019 July 1999
ISI Rept for Third Interval (1990-1999) Third Period, Second Outage (1999) at Re Ginna Npp.
ML17265A7021999-07-15015 July 1999
LER 99-010-00:on 990615,ventilation Isolation of Auxiliary Bldg Occurred When Auxiliary Bldg Gas Radiation Monitor R-14 Reached High Alarm Setpoint.Cr Operators Rest Auxiliary Bldg Ventilation Isolation Signal.With 990715 Ltr
ML17265A7661999-06-30030 June 1999
1999 Rept of Facility Changes,Tests & Experiments Conducted Without Prior NRC Approval for Jan 1998 Through June 1999, Per 10CFR50.59.With 991020 Ltr
ML17265A7011999-06-30030 June 1999
Monthly Operating Rept for June 1999 for Re Ginna Npp.With 990712 Ltr
ML17265A6851999-06-21021 June 1999
LER 99-001-01:on 990222,deficiencies in NSSS Vendor steam- Line Brake Mass & Energy Release Analysis Results in Plant Being Outside Design Bases Occurred.Caused by Deficiencies in W.Temporary Administrative Replaced.With 990621 Ltr
ML17265A6761999-06-16016 June 1999
Part 21 Rept Re Defects & noncompliances,10CFR21(d)(3)(ii), Which Requires Written Notification to NRC on Identification of Defect or Failure to Comply. Relays Were Returned to Eaton for Evaluation & Root Cause Analysis
ML17265A6661999-06-0202 June 1999
LER 99-009-00:on 990503,instrumentation Declared Inoperable in Multiple Channels Resulted in Condition Prohibited by Ts. Caused by Unanticipated High Frequency AC Voltage Ripple. Entered TS LCO 3.0.3.With 990602 Ltr
ML17265A6681999-05-31031 May 1999
Monthly Operating Rept for May 1999 for Re Ginna Nuclear Power Plant.With 990608 Ltr
ML17265A6651999-05-27027 May 1999
Interim Rept Re W2 Control Switch,Procured from W,Did Not Operate Satisfactorily When Drawn from Stock to Be Installed in Main Control Board for 1C2 Safety Injection Pump. Estimated That Evaluation Will Be Completed by 991001
ML17309A6541999-05-27027 May 1999
LER 99-008-00:on 990427,overtemperature Delta T Reactor Trip Occurred Due to Faulted Bistable During Calibr of Redundant Channel.Plant Was Stabilized in Mode 3 & Faulted Bistable Was Subsequently Replaced.With 990527 Ltr
ML17265A6631999-05-24024 May 1999
LER 99-007-00:on 990423,technicians Inadvertently Pulled Fuses from Wrong Nuclear Instrument Cahnnel,Causing Reactor Trip,Due to High Range Flux Trip.Caused by Personnel Error. Labeling Scheme Improved
ML17265A6601999-05-21021 May 1999
LER 99-006-00:on 990421,start of turbine-driven Auxiliary Feedwater Pump Was Noted.Caused by MOV Being Left in Open Position.Closed Manual Isolation Valve to Secure Steam to Pump.With 990521 Ltr
ML17265A6591999-05-17017 May 1999
Part 21 Rept Re Relay Deficiency Detected During pre-installation Testing.Caused by Incorrectly Wired Relay Coil.Relays Were Returned to Eaton Corp for Investigation. Relays Were Repaired & Retested
ML17265A6441999-05-13013 May 1999
LER 99-005-00:on 990413,undervoltage Signal of Safeguards Bus During Testing Resulted in Automatic Start of B Edg. Caused by Personnel Error.Blown Fuse Was Replaced & Offsite Power Was Restored to Safeguards Bus 17.With 990513 Ltr
ML17265A6431999-05-12012 May 1999
LER 99-004-00:on 990412,discovered That Containment Recirculation Fan Moisture Separator Vanes Were Incorrectly Installed,Per 10CFR21.Caused by Improper Assembly by Mfg. Subject Vanes Were Dismantled & Correctly re-installed
ML17265A6381999-05-0707 May 1999
Part 21 Rept Re Replacement Turbocharger Exhaust Turbine Side Drain Port Not Functioning as Design Intended.Caused by Manufacturing Deficiency.Turbocharger Was Reaasembled & Reinstalled on B EDG
ML17265A6391999-04-30030 April 1999
Monthly Operating Rept for Apr 1999 for Re Ginna Nuclear Power Plant.With 990510 Ltr
ML17265A6361999-04-23023 April 1999
Part 21 Rept Re Power Supply That Did Not Work Properly When Drawn from Stock & Installed in -25 Vdc Slot.Power Supply Will Be Sent to Vendor to Perform Failure Mode Assessment.Evaluation Will Be Completed by 991001
ML17265A6301999-04-18018 April 1999
Rev 1 to Cycle 28 COLR for Re Ginna Npp.
ML17265A6251999-04-15015 April 1999
Special Rept:On 990309,halon Systems Were Removed from Svc & Fire Door F502 Was Blocked Open.Caused by Mods Being Made to CR Emergency Air Treatment Sys.Continuous Fire Watch Was Established with Backup Fire Suppression Equipment
ML17265A6551999-04-0909 April 1999
Initial Part 21 Rept Re Mfg Deficiency in Replacement Turbocharger for B EDG Supplied by Coltec Industries. Deficiency Consisted of Missing Drain Port in Intermediate Casing.Required Oil Drain Port Machined Open
ML17265A6291999-03-31031 March 1999
Rev 0 to Cycle 28 COLR for Re Ginna Npp.
ML17265A6241999-03-31031 March 1999
Monthly Operating Rept for Mar 1999 for Ginna Station.With 990409 Ltr
ML17265A6141999-03-31031 March 1999
LER 99-003-00:on 990301,two Main Steam non-return Check Valves Were Declared Inoperable Due to Exceedance of Acceptance Criteria.Caused by Changes in Methodology & Matls.Packing Gland Torque Will Be Adjusted.With 990331 Ltr
ML17265A6131999-03-29029 March 1999
LER 99-002-00:on 990227,discovered That Surveillance Had Not Been Performed at Frequency,Per Ts.Caused by Personnel Error.Procedure O-6.13 Will Be Evaluated for Enhancement Documentation of Completion of ITS Srs.With 990329 Ltr
ML17265A6061999-03-24024 March 1999
LER 99-001-00:on 990222,plant Was Noted Outside Design Basis.Caused by Deficiencies in NSSS Vendor Slb Mass & Energy Release.Placed Temporary Administrative Restriction 40 Degrees F Max on Screenhouse Bay Temp
ML17265A5661999-03-0101 March 1999
Rev 26 to QA Program for Station Operation.
ML17265A5961999-02-28028 February 1999
Monthly Operating Rept for Feb 1999 for Ginna Nuclear Power Plant.With 990310 Ltr
ML17265A5371999-01-31031 January 1999
Monthly Operating Rept for Jan 1999 for Re Ginna Nuclear Power Plant.With 990205 Ltr
ML17265A5951998-12-31031 December 1998
Rg&E 1998 Annual Rept.
ML17265A5001998-12-21021 December 1998
Rev 26 to QA Program for Station Operation.
ML17265A4951998-12-21021 December 1998
LER 98-005-00:on 981120,loss of 34.5 Kv Offsite Power Circuit 751,resulted in Automatic Start of B Edg.Caused by Faulted Cable Splice.Performed Appropriate Actions of Abnormal Procedure AP-ELEC.1.With 981221 Ltr
ML17265A4931998-12-17017 December 1998
LER 98-004-00:on 971030,determined That Improperly Performed Surveillance Resulted in Condition Prohibited by Ts.Caused by Procedure non-adherence.Appropriate Calibr Procedures Were Properly Performed with 24 H of Condition Discovery
ML17265A4761998-11-30030 November 1998
Monthly Operating Rept for Nov 1998 for Re Ginna Nuclear Power Plant.With 981210 Ltr
ML17265A4691998-11-25025 November 1998
LER 98-003-01:on 980904,actuations of CR Emergency Air Treatment Systems (Creats) Occurred.Caused by Radon build-up During Temp Inversion.Creats Actuation Signal Was Reset & Normal Ventilation Was Restored to CR
ML17265A4531998-10-31031 October 1998
Monthly Operating Rept for Oct 1998 for Re Ginna Nuclear Power Plant.With 981110 Ltr
ML17265A4271998-10-0505 October 1998
LER 98-003-00:on 980904,actuations of CR Emergency Air Treatment Sys Occurred.Caused by Radon build-up During Temp Inversion.Air Samples Were Taken & Determined That Source of Radiation Was Naturally Occurring Radon.With 981005 Ltr
ML17265A4291998-09-30030 September 1998
Monthly Operating Rept for Sept 1998 for Re Ginna Nuclear Power Plant.With 981009 Ltr
1999-09-30
[Table view] |
Text
ATTACMMENT 1 Design Analysis Operability Evaluation for 857 A/B/C Ginna Station Rochester Gas and Electric Corporation 89 East Avenue Rochester, New York 14649 DA-ME-96-096 Revision 0 September 20, 1996 Prepared by:~~Design Engi eer 9p~9j, Date Reviewed by: Independent or Lead Engineer Date TECHNICAL INPUT FORM EIN 857A 857B 857C KEYWORDS CROSS REF PSSL 03 COMMENT MOV 0 erabilit None PROPRIETARY OTH R 5111 None YES NO X SUPERSEDES NonePage 1 960'F270297 960924 PDR ADQCK 05000244 VDa' REVISI N TATU HEET Revision Number Affected Sections Descri tion of Revision 0 all" initial document Design Analysis DA-ME-96-096 Page ii Revision 0
OBJECTIVE 2.0 To evaluate the operability of RHR system valves 857 A/B/C.Valve Bonnet pressure locking forces will be considered in this operability evaluation.
CONCLUSIONS 2~1 2.2 2.3 2,4 2.4'1 3.2 3.3 3.4 3.5 3.6 3'The total Required Thrust to open the 857 valves was determined to be 8759 lbs.This considers valve bonnet pressure locking conditions.
The minimum Available Thrust based upon In-situ Motor/Actuator capacity testing is 9456 lbs.Valves 857 A/B/C are considered operable since the available thrust exceeds the required thrust.The Total Required Thrust of 8759 lbs.does not exceed the weaklink limit thrust of 9027 lbs.Conservatisms associated with this analysis are discussed in Section 8.5.These conservatisms would add additional margin, between the available thrust and the required thrust to open the subject valves.Therefore this analysis is considered bounding.DESIGN INPUTS Design Criteria, EWR 5111, Revision 1.RG&E/MOVATS Static Diagnostic Test Package, MOV 857A, (M-64.1.2), dated 4/2/92.RG&E/MOVATS Static Diagnostic Test Package, (M-64.1.2), MOV-857A, dated 4/26/96.RG&E/MOVATS Static Diagnostic Test Package, (M-64.1.2), MOV-857B, dated 4/30/96.RG&E/MOVATS Static Diagnostic Test Package, (M-64.1.2), MOV-857C, dated 4/29/96.RG&E/MOVATS Diagnostic Test Package PT-50.19, (DP Test), 857A, Dynamic test dated 3/22/93, Static Test dated 4/2/92.RG&E/MOVATS Diagnostic Test Package PT-50.19, (DP Test), 857B, Dynamic Test dated 4/4/92, Static Test dated 4/4/92.Design Analysis DA-ME-96-096 Page 3 Revision 0 Date 9 19 96 3.9 3.10 3.11 3.12 3.13 3.14 4.0 4.1 6.0 RG&E/MOVATS Diagnostic Test Package PT-50.19 (DP Test), 857C, Dynamic Test dated 3/21/93, Static Test dated 4/3/92.RG&E MOV Thrust Calculation, 857A, dated 3/8/96.RG&E MOV Thrust Calculation, 857B, dated 3/8/96.RG&E MOV Thrust Calculation, 857C, dated 3/8/96.RG&E I/O J.E.Pacher to B.Flynn,"MOVs 857A, B, and C Voltages", dated 9/17/96.RG&E/MOVATS Diagnostic Test Package, PT-50.2, (DP Test), 860C, Dynamic Test dated 4/24/90, Static Test Date 3/19/93.Anchor/Darling letter, C.J.Bower to S.Greer, P.O.AP0-96190-1, Rev.0, dated 9/19/96.REFERENCES Altran Calculation No.94108-C-1, Rev.0, dated 11/1/94.ASSUMPTIONS None other than described in analysis.COMPUTER CODES 7.0 None ANALYSIS 7~1 7.1.1 7.1.2 7.1.3 The total required thrust (T~)to lift 857 A/B/C off the seat during its safety-related condition will be calculated utilizing the methodology of Reference 4.1.I The total required thrust will include bonnet pressure locking forces.This calculation will reflect the latest available information regarding the 857 A/B/C valves.The calculated total required thrust will be compared to the test-determined available thrust (T)for the purposes of an operability assessment.
Design Analysis DA-ME-96-096 Page 4 Revision 0 Date 9 19 96 Total Required Thrust (T): Stem Differential Pressure Load (F,~): Stem Area (A~)=nD 4 D;-Stem Diameter=1.375" (Design Inputs 3.9, 3.10, 3.11)4 F~=PqA, where P~=Bonnet Pressure (614.7 psi)7.2.2 F,~=(614.7)(1.48)
=913 lbs.Stem Disc Wei ht Force Fg: F=50 lbs.Note: This is conservative since the weight of the disc/stem assembly is assumed to be 50 lbs, per Ref.4.1;Actual Field weight measurement of spare disc/stem assembly was found to be 26 lbs.7.2.3~~Sealin Load F From Design Inputs 3.3, 3.4, and 3.5 the measured sealing loads (indicated as"unseating thrust-open direction")
for the 857 A/B/C valves are as follows: Valve Measured F 857A 857B 857C 586 lbs.769.8 lbs.769 lbs.7.2.4.'.Bounding F~is 770 lbs.Packing Friction Load (Fpp): From Design Inputs 3.3, 3.4, 3.5, 3.6, 3.7, and 3.8 the Measured Packing Friction loads (indicated as"Running Thrust-open direction")
for the 857 A/B/C valves are as follows: Design Analysis DA-ME-96-096 Page 5 Revision 0
Valve Measured Fpp 3.3 3.4 3.5 Measured Fpp 3.6 3.7 3.8 857A 857B 857C 247 lbs.498 lbs.513 lbs.535 450 400 7.2.5.'.A conservative Bounding F~=550 lbs, is used.Disc Differential Pressure Load (FDp): Disc Area (A~)=mDD 4 where DD=Disc Mean Seat Diameter, From Design Input 3.14, and Field Measurement; Dp 4'" Ap=~pp 4.5'15.9 inp 4 Fpp=i 2'g PUs PDpiAAp cos(qh)+@sin(p)where: P~=Bonnet Pressure=614.7 psi P=Upstream Pressure=147 psi (RHR Pump Side)P~=Downstream Pressure=2.9 psi (Rx side)p=Disc Seat Angle=0'Parallel Disc Gate Valve)p=Friction Coefficient
=0.5 (see below)p=0.5 Based upon Measured Valve Factors per Design Inputs 3.6, 3.7, and 3.8 and qb=0'therefore, p=valve factor): Valve 857A 857B 857C p (open direction) 1.18 (see note below)0.356 0.469 Design Analysis DA-ME-96-096 Page 6 Revision 0 Note: p=0.5 is bounding for 857 B/C, the data obtained from'A'alve was indicated to be suspect (based upon a low Dp used and no use of a Torque Thrust Cell).This value will be reverified during future MOV testing.Design Inputs 3.6, 3.7, and 3.8 reflect the above valve factors which are based upon a nominal seat diameter of 4.0>>(yielding an area of 12.566 in).These valve factors do not consider the stem rejection force or the torque reaction factor.If the valve factors are adjusted for a mean seat diameter of 4.5>>(Design Input 3.14), and the stem rejection force and torque reaction factor are included, the adjusted Valve Factor values would be lower, thus further enveloping the 0.5 value.FDp 2 614 7 147 2~9 0~5 15 9 cos (0)+(0.5)(sin 0)7.2.6 FDp=8582 lbs.Tor ue Reaction Factor T~g: DD TRp=1-(2.5.0151)(12)4 5>>TRp=0.96 where: F,=Stem Factor taken as 0.0151 ft (based upon conservative use of 0.2 for coefficient of friction)7.2.7 Total Required Force (TR): Reference 4.1 utilizes the following equation to calculate the total force required to open the valves: TR F+Fpp F+Fop~+F Design Analysis DA-ME-96-096 Page 7 Revision 0
The methodology of Reference 4.1 is very conservative, in that the Disc/Stem assembly weight load and the Packing Load are included in the calculation of total required thrust by the above equation, when in actuality these loads are already included in the unseating load (F,~).The second conservatism in this methodology is that the unseating force (F...q)is a measured value which already considers the Torque Reaction Factor (T~).Removing these two conservatisms results in a calculated required thrust of: Tg=(-913+8582)+770.96 7.3 TR=8759 lbs.Available Thrust (T)Available Thrust is obtained from In-situ motor/actuator capacity tests.From Design Input 3.2 the 1004 voltage thrust capacity was measured to be 10,832 lbs.Note: An in-situ motor/actuator capacity test, was also performed on valve 860B.The 860's are 6" x 4" x 6" Anchor Darling Parallel disc gate valves with SMB-00-7.5 actuators and are identical to the 857's.Per Design Input 3.13, the available thrust was measured to be 11,016 (at 1004 voltage, no reduction for temp.effects).Since this value is greater than the 857 value of 10,832 lbs, 10,832 lbs.will be used to be conservative.
It should also be noted that these type of tests are not performed under complete motor stall conditions..
Therefore, there would be some additional thrust available.
The In-situ Motor/Actuator capacity tests include consideration of stem factor.As was previously indicated, the 10,832 lb.thrust used for this analysis was for the 857A valve.The following stem factors are obtained from Design Inputs 3.6, 3.7, and 3.8 as follows (Note: these are for Design Analysis DA-ME-96-096 Page 8 Revision 0
closed direction only, no accurate data for open direction is available):
Valve Closed Stem Factor 857A 857B 857C*0.0117 0.0107 0.0089 7.3.1 The'A'alve has the highest measured stem factor in the closed direction.
It will be assumed that it also has the highest stem factor for the open direction.
Therefore, there is no reason to adjust the 10,832 lb.value by the ratio of the stem factors.From Section 7.2.4 add minimum running load (conservative) to calculate thrust available at control switch trip: 7.3.2 Tp ([gpss)10'32+247 1 1 g 079 lbs.Reduction for equipment error (from Design Input 3.3, Section 4): 7.3.3 Eg 5~744'1 1 g 079)+240 lbs~ER=876 lbs.Tp 1 1 g 079 876 10 g 203 lbs.Consider Reduced Voltage and temperature effects R=974 (conservative minimum from Design Input 3.12 for 857A)From Design Inputs 3.9, 3.10, and 3.11 the temperature effect reduction is 1.5%.Final Available Thrust per In-situ Motor/Actuator capacity test: T~10'03 (~97)(~985)7.4.'.T=9456 lbs.Acceptability (Operability)
T=9456 lbs.>T~=8759 lbs.Design Analysis DA-ME-96-096 Page 9 Revision 0
.'.Since the available thrust from previous in-situ motor/actuator capacity tests;considering equipment error, applicable reduced voltage and temperature effects considerations is greater than the calculated required thrust to unseat the valve (including bonnet pressure locking loads), the 857 A/B/C valves are considered operable.Note: Per Reference 4.1 the limiting weaklink thrust value was indicated to be 9027 lbs.Since 8759 lbs.<9027 lbs.the weaklink limit will not be exceeded for the subject valves.8.0 RESULTS 8.1 The total Required Thrust to open the 857 valves was determined to be 8759 lbs.This considers valve bonnet pressure locking conditions.
8.2 The minimum Avail'able Thrust based upon In-situ Motor/Actuator capacity testing was determined to be 9456 lbs.8.38.4 8.5 Valves 857 A/B/C are considered operable since the available thrust exceeds the required thrust.The Required Thrust of 8759 lbs.does not exceed the weaklink limit of 9027 lbs for the subject valves.Conservatisms associated with this analysis which make it bounding, are as follows: 8.5.1 The in-situ motor/actuator capacity tests, performd on two valves out of the affected group, were not taken out to complete 1004 stall conditions.
Therefore, it can be assumed that some additional thrust would be available.
8.5.2 The minimum running load measured for all valves from all current as-left available tests, was used to determine the 100%voltage available thrust.This results in an overall=lower available thrust for comparison.
8.5.3 In terms of a reduced voltage, the minimum for all valves and a slightly conservative value was used.This results in an overall lower available thrust for comparison.
Design Analysis~~DA-ME-9 6-0,9 6 Page 10 Revision 0
8.5.4~~The maximum sealing load from all valves was utilized.This yields a conservative calculated total required thrust.Design Analysis DA-ME-96-096 Page 11 Revision 0 Date 9 19 96 n