ML17292A611

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Rev 0 to Pressure Locking Evaluation for RCIC-V-31
ML17292A611
Person / Time
Site: Columbia 
Issue date: 07/12/1996
From: Kelsow W
WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:
Shared Package
ML17292A609 List:
References
ME-02-96-23, ME-02-96-23-R00, ME-2-96-23, ME-2-96-23-R, NUDOCS 9612030158
Download: ML17292A611 (26)
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RESPONSE TO REQUESTER PLANT SPECIFIC CALCULATIONy This attachment does not constitute an LBD.

Page 1 of 16.

whsrrrrrctoN tusLfc towER SUPPLY SYSI.EM CALCULATIONCOVER SHEET BDC Page NONE Equipment Piece No.

RCIC-Y-31, RCIC-MO-31 Project MIP2 Dllsclpline MECHANICAL Page 1.000 Conrd On Page 1.100 Calculation No.

MEW-8&25 Quarty Class Remarks c tmov<ileslrcictpjcajc.doc T1Ue/Subject PRESSVRE LOCKINGEYALVATIONFOR RCjC-Y-31 Purpose DETERMINETHE OPEN THRUST REQUIREMENTFOR A POSTULATED PRESSURE LOCQNG CONDITIONCAUSED SY PRE5SUREAT THE SUCTION LINERELIEF VALVESET PRESSURE BECOMING TRAPPED IN THE VALVEBONNET; REVISION NO.

STATUS/

F,PorS REVISION DESCRIPTION INITTALISSUE INITIATING DOCUMENTS GL 85-07 TRANSMITTAL NO.

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REVISION NO.

JEFE PERFORMED BY/DATE VERIFIED BY/DATE

~AWds'u APPROVED BY/DATE 96i2030i58 96ii25 PDR'DOCK 05000397 P

..fDR 166-1 6645 R2 (6IQs)

Study calculations shall be used only for the purpose of evaluating alternate design options or assisting the engineer in performing assessments.

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Page 3 of 16 WhafBPICFON tubUC POWER SUPPLY SYSTEM CALCULATIONINDEX Page 1.100 Calculation No.

Cont'd On Page 1.200 Calculation Cover Sheet Calculation Index ME;02-8lo-23 Revision No.

0 PAGE No. SEQUENCE 1.000 -

t.ggg 1100 -

troo Verification Checklist for Calculations and CMR's Calculation Reference List t.2go 1.300 -

trot Calculation Output Interface Document Revision index

" 400 -

l.eo Calculation Output Summary Calculation Method, Sketches Manual Calculation 2 000 -

agog 3 000 -

a.ooo 4.000-5.000-APPENDICES:

MATHCADCALCUlATlON Historical / Information Superseded Pages Appendix A Appendix B Appendix C Appendix 0 Appendix H Appendix S Appendix Appendix Appendix N/A N/A Pages Pages Pages Pages Pages Pages Pages Pages Pages 008.25ZTS R1 tSIQS)

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RESPONSE TO REQUEST R PLANT SPECIFIC CALCULATION This attachment does not constitute an LBD.

Page 4 of 16 wA$8plcroN tUIUc towER N SUPPLY SYSIXM VERIFICATIONCHECKLISTFOR CALCULATIONSAND CMICE 1.200 1.300 Calculation/@MR M-verified using the following methods:

Q Checklist Below Revision ~ was Q Alternate Calculations Checklist item Clear statement of purpose of analysis Methodology clearly stated and sufficiently detailed and appropriate to proposed application Logical consistency of analysis

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Completeness ofdocumenting references

~

Completeness ofdocumenting and updating output interface documents Completeness of input Consistency of input data with approved criteria Completeness in stating assumptions Validityof assumptions Calculation sufficiently detailed

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Arithmetical accuracy

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Physical units specified and correctly used Reasonableness of output conclusions Supervisor independency check gf acting as Verifier)

Did not specify analysis approach Did not rule out specific analysis options Did not establish analysis inputs

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Ifa computer program was used:

Is the program appropriate forthe proposed application?

Have the program error notices been reviewed to determine ifthey pose any limitations for this application?

Is the program name, revision number, and date of run inscribed on the output?

Is the program identified on the Calculation Method form?

'fso, is it listed in Chapter 10 of the Engineering Standards Manual?

Other Elements Considered Zevz initial

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Ifa separate verifierwas used forvalidating these functions or a portion ofthese functions, sign and initial below.

Based on the foregoing, the calculation is adequate forthe purpose intended.

VerifierSignature{a) IDate VerifierInitials

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Page 5 of 16 WASHWCTOM tUBLIC POWER SUPPLY SYSTEM CALCULATIONREFERENCE LIST 1.301 Reialon No.

Con'I On Page 1.400 ME-02-9&23 SEQUENCE NO.

AUTHOR ISSUE DATE, EDITION OR REVISION TITLE Gcc Rcfcrcnccs Scctlon of A cndtx A

. L DOCUMENT'O.

RESPONSE TO REQUESTER PLANT SPECIFIC CALCULATION~

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Page 6 of 16 WASHOIC1ON tUSLlC tOWER SUPPLY SYSTEM CALCULATION OUTPUT INTERFACE DOCUMENTS REVISION INDEX 1.400 Con1cn Pspo 2.000 Prspatod ByI Oatn JE FEtuew VenAo4 ByIOSI~

7/11/98 ~.~gap ~EWE ME-02-98-23 Reislon Ha 0

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The below listed output interface calculations and/or documents are impacted by the current revision of the subject calculation. The listed output interfaces require revision as a result of this calculation. The documents have been revised or the revision deferred with Manager approval, as indicated below.

AFFECTED DOCUMENT NO.

None CHANGED BY

BDC SCN CMR Rev.

CHANGE DEFERRED RFTS NO.

DEPT.

MANAGER' Re uired for deferred chan esonl 088 26286 (SI03)

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RESPONSE TO REQUESTER PLANT SPECIFIC CALCULATION~

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Page 7 of 16 wAs)GNGTQN FUEL)c pou/Ea N SUPPLY SYSIXM Discuss)on o) Resuits CALCULATIONOUTPUT

SUMMARY

Page Con't On Page 2.000 S OOO Ca)ouht)on ))o.

ME-02-98-29 Revision No.

0 1.

TME TOTALREQUIRED THRUST'TO OPEN RCIC-Y-31 NTH THE VALVEPRESSURIZED TO 118 PSIG IS 1024f LG.

2.

THE ACTUATOR OPEN THRU5TCAPAGILI7YIS 13,~ LO. (310% POSITlVE THRUSTMARGIN) 3.

7HE MAXIMUMPREFERRED ST'ATIC UNSEATlNG LOADI5 9 948 LS TO ENSURE THAT'THRUST'LIMITATIONSOF THE VALVEOR ACTVATORARE NOTEXCEEDED, Conc)us)on s RCIC-V-31 REMAINSOPERAOLE UNDER THE POSTULATED PRE55URE LOCKINGCONDmONS.

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RESPONSE TO REQUESTER PLANT SPECIFIC CALCULATION~

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Page 8 of 16 Page ConTd On Page WASIIRICZON PIIELIC POIFER SUPPLY SYSIKM Ptapaead bytoata JE FELLMAN tnatyata Method (chaott appropriate boxee)

CALCULATIONMETHOD Varttted bytData u>V98 3.000 Appcndbc A ME-02-98-23 Itevtaton Ho.

[g Manual (As required, document source of equations in Reference List)

Q Computer Q MainFrame Q

Personal Q

In-House Program Q Computer Service Bureau Program BCS CDC PCC VelTTied Program: Code name/Revision Q Other Q Unverified Program: Document in Appendix B Apptsaeh/Methodotogy REV.

BAR THIS CALCULA7)ONJS SASED ON THE METHODPRESENTED INTHE PROCEEDINGS OF THE SORKSIIOPON GATE VALVEF'RESSURE LOCKINGANDTHERMALBINDINGHELDSY THE NRC FE8. 4, 1994; NVREGICF'-Of@8. 7HE METHODDIRECTLYAPPUES THE EQUAT)oNS coNrAIHEDINTHE 57H EDlIJDNoF RDARK4 Y0UNGs F0RMUlAsF0R STRESS ANDSTRAIN, REF. 8.

THE TOTALREQUIRED THRUSTFOR OPENING ANYVALVEs UNDER PRE55 URGED SONNEfCONDJT)ONS, JS DEPENDENrON THE FINAL WEDGING FORCE FROM THE PREVIOUS CLOSING CYCLE. FORA GIVENTORQUESWIrCH SEl7JNG, 7HE WEDGIIJG FORCE CANVARY SECAUSE INERTIALOVERSHOOT JS AFFEClED SY THE MAGNlllIDEOF 7HE DIFFERENrIALPRE5S URE ACROSS THE DISC.

7YPRALLY,THE HIGHESTWEDGINGFORCE WOULDSE INTRODUCEDWHEN THE VALVEJS CLOSED WIIHOUrDIFFERENTIALPRESSURE THIS CALCULATUN CONSERVATIVELYQUANOFJES THE UNIIEDGINGFORCE SASED ONAN~4 AS TESTEDUNIVEDGINGFORCE UHDER SrATJCCOHDIMNSs ANDGIVENSONNET PRE55URE ANDUP57REAM ANDDOyrrNSTREAMEXlERNALPRE55URES.

THE CALCULAT)ONALSO MODELS A WEDGE PISTON EFFECr FOR FLEXWEDGE GATE VALVESWJIERESY LOWER EXTERNALPRESSURES 7HANTHE INTERNALSONNEr PRESSURE CANRESULT'INANErPOMlVARDFORCE MJCH OPPOSES 7HE 5TEMPISTVNEFFECT.

CDNvERsELY, HIGHER ExlERNALPREssUREs cANRESULTINA NEr UPwARDFDRcE.

THE NErFoRcE J5 EllHER PosmvE oR NEGAT)vEIN THE OVERALLDETERMJNAT)ONOF THE FORCE REQUIRED TO OPEN THE VALVE.

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Page 9 of 16 RC3 IPLR02vfCD w~~~tx 4 CALCULATIONME4 -9 Prepared By:

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OPENING THRUST CAPABILITYCALCULATIONFOR RCIC-V-31; SUPPRESSION POOL SUCTION VALVETO RCIC PUMP UNDER POTENTIALPRESSURE LOCKED CONDITION 7N/96 V.O WW P:= 0 psig V EHW:= (466-453) 0.433 V EHW =5.6 psig V EHRV:= (453-431) 0.433 V EHRV =9.5 psig PB:= 125.5 - V EHRV psig P CST:= (448-426) 0.433 P CST =9.5 psig V OP:= WW P psig MSD:= 8.17 in H R:= 3.38 in v:= 0.30 VSA:= 50:= VSA-.01745 0 =0.1 SUW:= 7646 Ibf SUW re:= 0.104 SUW fsc:=0 Ibf SD:= 1.625 in RL:= 441 Ibf It:= 0.0863 VF:=.6.

DV:= 0.8 TPI:= 4 TS:= 2 MS:= 1900 rpm OAR:= 362 MOT TQ:= 15 It-Ibs MOT TQ loss:= 0.0 TLT:= 250 F ATL:= 104 F PO elf:= 0.4 RUN elf:= 0.5 STALL cff:= 0.6 OTL:= 22680 Ibf VOL:= 25167 lbf T max:= 220F GR:= 250 It-Ibs SFM:= 0.0123 Wetwell Chamber Pressure Elevation Head on Valve, Wetwell Side (due to minimum WWlevel)

Elevation Head Gem Relief Valve to Valve (reliefvalve is below RCIC-V-3I)

Internal Bonnet Pressure (reliefvalve sctpoint)

Suction Pressure (CST head, keepfull pump oII)

Valve Open Pressure.

Mean Seat Diameter Valve Hub Radius Poisson's Ratio for carbon steel Valve Seat Angle (degrees), 0 (radians)

Measured Static Unwedging Load Measured Unwedging Load Reading Error Measured Unwedging Load Full Scale Error Stem Diameter Measured Running Load Measured Stem Coeflicient ofFriction Measured Valve Factor Degraded Voltage Tlneads Per Inch Thread Starts (Lead xTPI)

Motor Speed Unit Overall Ratio Motor Torque Torque Loss 250 F Torque Loss Temperature MinimumAmbient Temp. forTorque Loss Pullout El5ciency Run EIIiciency Stall EIIicicncy Operator Thrust Limit(162%)

Valve Open Thrust Limit Max. Operating Temp.

Gear Rating Measured Stem Factor Assumed Rcf. 2, pg. D-28 Ref. 2, pg. D-27/8 Ref. 2, pg. D-28" Ref. 19,20 Rcf. 4 Measured Ref. 7,p546 Ref. 4, DR-1078, pg. 82 Ref. 13 Ref. 13 Ref. 13 Ref. 10 Ref. 13 Ref. 13 Ref. 13 Rcf. 14 Rcf. 15 Ref. 15

, Ref. 15 Ref. 15 Ref. 15 Ref. 16, Att. 6.3, pg. 3 Ref. 16, Att. 6.3, pg. 3 Rcf. 16, Att. 6.3 Am. 93-14 Ref. 16, Att. 6.5, Am. 9345 Rcf. 16, Att. 6.5, Am. 9345 Ref. 16, Att. 6.5, Am. 9345 Ref. 168k 17 Ref. 11 Ref. 8 Ref. 17 Unseating, Rcf. 13

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Page 10 of 16 RC31PLRO.MCD CALCULATION~2-96-23 RKV. 0 Prepared By:

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1) Detenninc the operability ofthe valve withthe bonnet pressurized to suction line reliefvalve set pressure witha 5% stem factor degradation.

The motor operator should have sufficient capability to open the valve with the bonnet pressurized without exceeding the thrust limitations ofthe valve or the operator.

2) Determine the maximum prcfencd static unwcdging force with a 5% stem factor degradation to provide increased assura'nce that the valve or operator open thrust limitwinnot bc exceeded.

BtaRHBaL:

1) WNP-2 Pressure Locking and Thermal Bindiag Report, WPPSS-ENT136, December 29, 1993.
2) RCIC System MOVDesign Basis Review, C106-9243.05.
3) PPM 2.4.6, Reactor Core Isolatioa Cooling System
4) QID 361701
5) EPRI Perfonnance Prediction Program, EPRI TR-103119
6) Formulas for Stress and Strain, Roark and Young, 5th Edition.
7) Handbook ofEngineering Fundamentals, Eshbach, John Wileyand Sons, 1969.
8) QID 221001
9) NUREG/CR-5807, Impmvements inMotorOperated Gate Valve Design aad Prediction Models forNuclear Power Systems.
10) CVI4 1A40P3
11) Weak LinkCalculation, 216-92453, CMR 964234
12) Limitorque SEL-3
13) RCIC-V-31 MOVATSTest WO NAP3465, test date May 25, 1993.
14) Calculation E/I 02-9242.
15) Calculation ME42-92-150, Rev. 0, CMR 944018
16) MES-10; Limitorque opemtor can withstand a one time thrust overload ofup to twice the nominal rating or up to 162% for 2 cycles.
17) Limitorque Selection Pmcedure, SEL-7.
18) NUREG/CP4146, Workshop on Gate Valve Pressure Lochng and Thermal Binding, Feb. 4, 1994
19) Instrument Master Data Shet, RCIC-LS-15A, LOWLOWCST Level causing RCIC-V-31 to open
20) CVI21540-3195, RCIC suction piping isometric
1) The absence or existence ofa vapor pocket in the bonnet does not change the total required stem thrust to open the valve.
2) External pressure on the disc willnot reduce the static unwcdgiag load.
3) Assume the static unwedging load is directly additive to the differential pressure dynamic load due to bonnet pressure.
4) Running load is assumed to remain constant over the interval between baseline tests. Ruaning load is accounted for indirectl since running load is included in thc measured unseating load and the measured unseating load is added directly to the calculated pressure locking load in determining the required thrust to opea
5) The CST is at the low level switchover point, RCIC keepfull pump is not running, and the wetwell is at atmospheric pressure.

This willcreate the largest diQereatia) pressure across each side ofthe disc when the bonnet is pressurized to the suction line relish'alve set pressure minus elevation head.

RESPONSE TO REQUEST R PLANT SPECIFIC CALCULATION This attachment does not constitute an LBD.

RC3 IPLRO.MCD Page 11 of 16 5KIJlKK:

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'n thedscduetoint CALCULATIONME-02-96-23 REV. 0 Prepared By:

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ce able 24 ase 2d.

a:~ 0.5.MSD b:= H R q i:= PB ro:= b a~4.1 b~3.4 q i~116 ro=3.4 C2:= 025 L

b C3:~

4a I -

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1 +2 In-

+ I In + - I C2 =0.014 C3 =0 b 2 C8:= 0.5 1+v+(I v) a 2

C9:= -

In + I -

C8 =0.9 C9 =0.1 I

ro 2 LII:=I +4 64 a

I-v L17:=0.25 I-

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2 2

5 -

4

~ 2+ ln I - - ~ I + (I + v) In LII =0 L17 =0 Determine the force on the perimeter ofthe disc hub (Qb i, Ibfin)

I

. a (C2 L17 - C8 LII)

Qb t:=q t C2 C9 - C3 C8 Qb i =54.4416 Determine the force on the perimeter ofthe disc (Qa i, Ibfm) at the seat ring Qa t:= Qb t -

~ a - ro Qa i =-29.6604 a

Case 2d for Internal Pressure

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Page 12 of 16 RC31PLRO.MCD CALCULATIONME'A2-96-23 REV. 0 Prepared By:

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'the forckse krted a

rkssurcs on k hi ure side and on the low ressure side usi eference able 24 Ca e 2d and Case b

WW side:* V OP+ V EHW PUMP side:= P CST q h:= if(WW sidezPUMP side,WW side PUMP side)

PUMP side =9.5 q I:= if(WW side<PUMP side,WW side, PUMP side)

WW side =5.6 q h=9.5 q 1=5.629 Determine the force on the perimeter ofthe disc hub (Qb h, Ibfm) due to the high pressure side a (C2 L17-C8.LII)

C2C9-C3 C8 Qb h =4.4718 Determine the force on the perimeter ofthe disc (Qa h, Ibfm) at the seat ring due to the high pressure side Qa h:= Qb h - (a - m j a

2a Qa h =-2.4363 Determine the force on the perimeter ofthe disc hub (Qb Ilb') due to the low pressure side a (C2.L17 - C8 LlI)

C2C9-C3 C8 Qb I ~2.6424 Determine the force on the perimeter ofthe disc (Qa I, Ibfm) at the seat ring due to the low pressure side Qa I:= Qb I a ro Qa I =-1.4396

'etermine the force on the perimeter ofthe hub (W hub, Ibfm) due to the differential pressure over the hub area (q h-q I) xb W hub =6.5859 Determine the differential force on the perimete ofthe hub (W hub h I, Ibfm) due to the high and low pressure side, which excludes the hub area.

W hub h I:= Qb h-Qb I W hub h 1=1.8294 Determine the total differential force on the perimeter ofthe hub (W hub bF, Ib/in)

W hub dF:= W hub+ W hub h I W hub bF =8.4153

RESPONSE TO REQUEST R PLANT SPECIFIC CALCULATION This attachment does not constitute an LBD.

Page 13 of 16 RC31PLRO.MCD CALCULATIONME@2-96-23 REV. 0 Determine thc force on thc perimeter ofthe disc (Qa dhl, Ibfin)on the low pressure side duc to the external differential pressure.

Qa deal:~ 0- W hub N a

Qa ~ ~-6.963 t

ine e

eac seat

'n duetothefour sureloadin co ditions Determine the ring load on the high pressure side (Qr h, Ibfin)

Qr h:= Qa i-Qa h Qr h =-27.2241 Determine the ring load on the lowpressure side (Qr I, Ibfin)

Qr I:= Qa i-Qa I+ Qa ~

Qr I =-35.1838 Determine the total disc force on the high pressure side (F h, Ibf)

F h:= x MSD Qr h F h =%99 F h:= if(F ha0,(-1) F h,F h)

Determine thc total disc force on thc low pressure side (F I)

F h =-698.7571 F I:=xMSDQr I F I:= if(F IaO,O,F I)

Determine Disc Area (DA,in"2) 2 DA:= x.MSD 4

F 1=-903 F 1=-903 Ibf DA~ 52.4 in

. 2 DF:i VF DF =0.6 ct e

e total re i

b Determine thrust required due to pressure only (RT~, Ibf)

RT~:= (F I+F h) DF RT~:= if(RT~>O,RT~,(- I) RT~)

RT~ = 961 Ibf

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Page 14 of 16 RC31PLRO.MCD CALCULATIONME@2-96-23 REV. y I'relied By:

VerifiedBy:

Determine Stem Piston Effec (SPE, lbf)

Determine Stem Area (SA, in"2)

SD SA:~ sc 4

Calculate the Stem Piston Effect SA ~2.1 SPE:0 SA PB SPE ~241 Determine the Net Wedge Piston Effect (NDPE, lbf)

Determine the top halfofthe projected area ofone ofthe discs only due to the angle ofthc wedge (PAT, in"2)

'Ihe top width TW:= MSD sin(0) TW =0.7 The projected shape ofthe wedge area is an ellipse.

PAT:= x 0.5 MSD 0.5 TWPAT =4.6 Ref. 7, pg. 2-56 Dctenniae total projected area that would result in a downward force from internal bonnet pressure (IPAT, ia"2). TPAT also represcats the area over which the up@md forces from external disc pressures would act.

TPAT:~ 2.PAT TPAT ~9.1 Determine thc Internal Wedge Piston Effect (IDPE, lbf)

IDPE

= TPATPB IDPE = 1060 Determine the External Wedge Piston Effect for the high pressure side (EDPEH, lbf)

EDPEH:= PAT q h EDPEH =44 Determine the External Wedge Piston Effect forthe low pressure side (EDPEL, lbf)

EDPEL:= PAT q I EDPEL =26 Determine the Net Wedge Piston Effect NDPE

= IDPE - EDPEH-EDPEL NDPE ~ 990 Determine the corrected Static Unwedgiag Load (SUWC, lbf)

SUWC;=

+ SUW fse I-SUW re TOTALREQUIRED THRUST TO OPEN (RTO, lbf)

RTO:= SUWC+ RT~ - SPE+ NDPE SUWC = 8533 RTO = 10244 6

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Page 15 of 16 RC31PLRO.MCD 7/8/96 CALCULATIONMFA2-96-23 REV. 0 Prepared By:

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OP C lb Determine Stem Factor (SF, ft)

TS TANa:=

TPI K SD- 0.5 SD.5(.96815 TANa + p)

I SFI:=

24 (.96815 p TANa)

TANa =0.1 SFI =0 SF:= if(SFM>0,SFM, SF1)

Determine Torque Loss at Max. Operating Temperature (IL)

SF =0 i:= 1..2 OT TQ loss TL:= Iinterp(vx,vy,T max)

Determine Motor Start Torque (MST, ft-lbs)

MST:= MOT TQ (I - 'IL)

MST ~ 15 Determine Reduced Voltage Factor (RVF)

RVF:= DV RVF =0.8 DC motor Determine Pullout Torque (POT)

POT;= MST OAR PO efrRVF POT:= if(POT>GR,GR, POT)

OPERATOR OPEN 'IHRUST CAPABILITY POT = 173.8 ft-lbs POT ~ 173.8 ft-lbs OTC:=

POT SF MARGIN:=OTC - RTO OTC = 14127 MARGIN= 3882 lbf

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Page 16 of 16 RC31PLRO.MCD CALCULATIONME-02-96-23 REV. 0 Pngmred By:

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TO RAD 0

C POT OTCI:*

SF 1.05 OTCI = 13454 Ibf S

C ING RC S

T LM:=if(VOL>OTC,OTC,VOL)

T LM:=if(T LM>OTL,OTL,TLM)

T LM:=if(T LM>OTCI,OTCI,T LIM)

VOL=25167 OTC1 =13454 OTL =22680 MSUW:= SUWC - (RTO - T LIM)- 1000 - SUW fse - SUW SUW re T LIM= 13454 Ibf MSUW=9948 Ibf T LM=13454 SUWC =8533 SUW =7646 C

C SIO RTO ~ 10244 SUW fse=0 SUW re ~O.I I) The highest total required thrust to open@TO = 10244 Ibf)is less than thc operator capability with5% stem factor degradation ( OTC1 ~ 13454 Ibf). Therefore, the valve is capable ofperforming its safety function with a bonnet pressure of PB ~ 116 psig, pumpside prcssure ofP CST ~9.5 psig, and wetwell chamber'pressure of WW P ~0 psig.

2) The maximum prefened static unwedging force was determined to beMSUW =9948 Ibf The measured static unwcdging force of SUW =7646 lbf is less than the maximum preferred value.

The maximum preferred unwcdging force ensutes the calculated required ttuust to open wiHnot exceed the thrust limitations ofeither the valve or the operator with a 1000 Ib margin.

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