ML20116J522

Pressure Locking Evaluation for Required Pullout Force (for Double Disc Split Wedge)

ML20116J522
Person / Time
Site:	Sequoyah
Issue date:	08/06/1996
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20116J490	List: ML20116J488 ML20116J497 ML20116J502 ML20116J505 ML20116J509 ML20116J515 ML20116J517 ML20116J522 ML20116J525 ML20116J536 ML20116J539 ML20116J541 ML20116J544
References
2-FCV-63-25, GL-89-10, NUDOCS 9608130252
Download: ML20116J522 (2)

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MOV Calc No. 2-FCV-63-25 (GL 89-10) Page l0F2 PRESSURE LOCKING EVAL.UAT10N FOR REQUIRED PULLOUT FORCE (for Double Disc Sollt Wedae)

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jj= INPUTS MOV '2 FCV-63-25) , Valve type = 1DD Spilt Wedgei ARK No?]300iB; VALVE DWG ( [93412859ll EPRI NP-6516 Calc Meth VALVE DESIGN DATA y :l0 40.4l theta (A) =l - o0ldeg EPRI MOV PPP INTERNAL DEslGN INFO, Ref.

D1 E1 M1 a= 1.8438 inches ro= 0.625 inches dE[il.5333(5753~j$j^.55]

b= 0.625 inches v= 0.3 a= ((01 + E1) / 2) / 2 = 1.84375 b= M1/ 2 = 0.625 = ro e Mean Seat Dia (D1+E1)/2 = 3.6875 in v= Poisson's Ratio = Nd~31 (D)

(d) Stem Dia = enim1.625 in u: seating surfaces friction coef 10.68 (in)^2 based on Calc method. & EPRI results (S2) Valve Seat Area ((D)^2*Pl/4=

mu/(cosA + musinA) = OA000 (Vf) theta = 1/2 total valve 2.07l(in)^2 disk angle (St3) Stem Area ((d)^2*Pl/4= l Packing Load (Calculated) = 1625 lbs Valve Seat Area Based on :

(PI)

Packing Load (Actual, average) = , av sisw0 lbs D1. E1 (PI)

PRESSURE and TEMPERATURE DATA

'ob) Pbon = PMna c2735l psi P up = pmm2600 psi (Pu)

P down = >

D o s0 ps/

(Pd)

DP= l 2600lpsid PRESSUE INDUCED. PRESSURE LOCKING THRUST REQUIREMENT:

THRUST = [ { (Pb - Pu) + (Pb - Pd) } * {S2} * {Vf} } - { (ST3) * (Pb) } + Pi ] + UNWEDGING WHERE: Pb = Pressure in valve Bonnet UNWEDGING = l? M 0llbs Pu = Pressure upstream of Valve Pd = Pressure downstream of Valve S2 = Valve Seat Area Vf = Valve Friction Factor St3 = Stem Area PI = Packing load (maximum value)

THRUST = 8213lbs PRESSUREINDUCED. P L - MAXIMUM BONNET PRESSURE @ ACT/ VALVE LIMITING CAP PRESSURE = { A/VLIMTH + (S2

• Vf * (Pu + Pd)) - Pl } / { (2

• S2 *Vf)- St3 )

PRESSURE = 3991 psi

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Checked:

9608130252 960806 PDR ADOCK 05000327 P PDR

MOV Calc No. 2-FCV-63-25 (GL 89-10) Page Z 0F1

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PRESSURE LOCKING REQUIREMENT = 8213 lbs

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ACTUATORNALVE CAPABILITY EVALUATION CALCULATION: #FC9-63-25' l

Actuator Model jSMB-0[

Motor Start Torque (MT) {"T"~515lfttbs

~;87.2)

Overall Gear Ratio (OGR)

Pullout Efficiency (PE) e # ~'%

Application Factor (AF) 0.9 or 1.0 4 Valve Factor (VF) 1.0 or (VF/460)"2 a  :

367.5VAC 6!6{8)j Stem Factor (SF)

Max Temperature (Temp) 215 F 1

Loss Percentage (elevated temp) [FIEff2T.*4]% Note 1 Torque Loss Factor = 1-Loss %*(Temp-104)/(356-77) 0.9149 l

t Actuator Torque Capability = (MT

• OGR

• PE#AF

• TLF " VF) 305.53 fttbs SF -

Actuator Thrust Capability = Torque / Stem Factor 16338lbs 0.0187 Actuator Thrust / Torque Rating @06]Ibs

{.[S00,00jftibs gg Valve Weak Link Thrust / Torque Rating EW@9870]Ibs SF =

932.57 filbs 0.0187 Seismic Thrust / Torque Rating Q$$6Dllbs SF =

628.32 filbs 0.0187 Nota 1:

Reference:

Limitorque Technical Update 93-03 RESULTS: PRESSURE LOCKING RF.QUIREMENT = 8213 lbs ACTUATOR / VALVE LIMITING CAPABILITY = 16338 lbs 1 cut = MOTOR CAP COMMENTS:

emme Prepared: Checked: -

Rev.