ML20116J517

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

ML20116J517
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
1-FCV-63-26, GL-89-10, NUDOCS 9608130250
Download: ML20116J517 (2)

Text

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• MdV Calc No. 1-FCV-63-26 (GL 89-10) PageIoF L PRESSURE LOCKING EVALUATION FOR REQUIRED PULLOUT FORCE (for Double Disc Solit Wedae)

'; gy =INP'UTS MOV !1.FCV-63 26 Valve type = lOD' Spilt Wedge VALVE DWG ; [93-12859[ EPRINP-6516 Calc Meth ARK nod 8B?

VALVE DESIGN DATA y :l= w 0.4l theta (A) =l: 0ldeg EPRI MOV PPP INTERNAL DEslGN INFO, Ref.

D1 E1 M1 l a= 1.8438 inches ro= 0.625 inches m2p.5[jj[2.'8752;l;.Jlg.25 l v= 0.3 a= ((D1 + E1)/ 2)/ 2 = 1,84375 b= 0.625 inches b= M1/ 2 = 0.625 = ro

! v= Poisson's Ratio = EWbj Mean Seat Dis (D1+E1)/2 = 3.6875 in l (D)

Stem Dia = emp 1.625 in l

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

(Vf) mu/(cosA + musinA) = 0.4000 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 l (PI)

(PI) Packing Load (Actual, average) = c0 Ibs Di. E1 l

PRESSURE and TEMPERATURE DATA Pbon = l;; 22735l psi (Pb) l 4

g. a) P up = m 2600 psi l P down = v0 psi (Pd)

DP= l 2600lpsid j PRESSURE INDUCED, PRESSURE LOCKING THRUST REQUIREMENT:

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

THRUST = 8213lbs PRESSURE INDUCED. P L - MAXIMUM BONNET PRESSURE @ ACTNALVE LIMITING CAP PRESSURE = { ANLIMTH + (S2

• Vf * (Pu + Pd)) - Pl } / { (2

• S2 *Vf)- St3 }

PRESSURE = 4009 psi Rev. Prepared: Checked: [

9608130250 960806 r PDR ADOCK 05000327 P PDR

.i M V Calc No. 1-FCV-63-26 (GL 89-10) Page 1of 1

' PRNSSURE LOCKING REQUIREMENT = 8213 lbs ACTUATOR / VALVE CAPABILTTY EVALUAT10N CALCULATION: '1-FCV-63-26L Actuator Model F SMB-01 Motor Start Torque (MT) "i 515;ftibs Overall Gear Ratio (OGR)

• p B7.2 i Pullout Efficiency (PE) pfy fl40;%

Application Factor (AF) 0.9 or 1.0 gjhgij Valve Factor (VF) 1.0 or (VF/460)"2 j$p0.6428j 368.8VAC l

i Stem Factor (SF) EW D.0187) f Max Temperature (Temp) 215 F Loss Percentage (elevated temp) @@@% Note 1

Torque Loss Factor = 1-Loss %*(Temp-104)/(356-77) 0.9149 1 Actuator Torque Capability = (MT

• OGR

• PE *- AF

• TLF

• VF) 307.68 filbs SF =

j hetuator Thrust Capability = Torque / Stem Factor 16453lbs' O.0187 1

Actuator Thrust / Torque Rating DISI53660'Ibs hSM 0}ftibs Valve Weak Link Thrust / Torque Rating ((@395"/0jlbs SF=

932.57 filbs 0.0187 i l

Seismic Thrust / Torque Rating Q Q $ _0jlbs SF= l 628.32 fttbs 0.0187 (

Note 1:

Reference:

Limitorque Technical Update 93-03 RESULTS: PRESSURE LOCKING REQUIREMENT = 8213 lbs  !

ACTUATOR / VALVE LIMITING CAPABILITY = 16453lbs 1 cut = MOTOR CAP COMMENTS:

l Rev. Prepared: Checked: // g