ML20116J525

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

ML20116J525
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-63-26, GL-89-10, NUDOCS 9608130254
Download: ML20116J525 (2)

Text

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a 2-FCV-63-26 (GL 09-10) Page 1oF1

' MOV Calc No.

PRESSURE LOCKING EVALUATION FOR REQUIRED PULLOUT FORCE (for Double Disc Solit Wedae)  !

MOV '2-FCV-63 26" Valve type = DD Shiit Widge

, [j)) = INPUTS VALVE DWG ^ 593 12859 i EPRINP-6516 Calc Meth ARK No.Y 'jySQf[}

VALVE DESIGN DATA theta (A) =) ; e Oldeg EPRI MOV PPP INTERNAL DEslGN INFO, Ref.

u:b 4

? 0.4]

D1 M1 E1~

a= 1.6438 inches ro= 0.625 inches E 3.M22S73FM.25l 1.84375 I

0.625 inches v= 0.3 a= ((D1 + E1)/ 2)/ 2 =

b=

b= M1/ 2 = 0.625 = ro 1 3.6875 in v= Poisson's Ratio = ERTOT (D) Mean Seat Dia (D1+E1)/2 =

Stem Dia = gyss1.625 in (d) seating surfaces friction coef u

10.68 (in)^2 based on Calc method. & EPRI results (S2) Valve Seat Area ((D)^2*Pl/4=

0.4000 (Vf) mu/(cosA + musinA) = 1/2 total valve theta =

l 2.07l(in)^2 disk an0le (St3) Stem Area ((d)^2*Pl/4=

1625 lbs Valve Seat Area Based on :

(PI) Packing Load (Calculated) = D1, E1 Packing Load (Actual, average) = ~ m mago /bs (PI)

PRESSURE and TEMPERATURE DATA Pbon = D' Aa A2735l psi (Pb)

P up = m i 32600 psi

, .. ' u) .20 psi P down = xon s (Pd)

DP = l 2600lpsid l

PRESSURE INDUCED. PRESSURE LOCKING THRUST REQUIREMENT:

THRUST = [ { (Pb - Pu) + (Pb - Pd) ) * {S2} * {Vf) ) - { (ST3) * (Pb) ) + Pl ] + UNWEDGING i

WHERE: Pb = Pressure in valve Bonnet UNWEDGING = lw Ollbs 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 PRESSURE INDUCED. P L - MAXIMUM BONNET PRESSURE @ ACT/ VALVE LIMITING CAP PRESSURE = { A/VLIMTH + (S2

• Vf * (Pu + Pd)) - Pl } / { (2

• S2 *Vf) - St3 )

PRESSURE = 4099 psi hk [- .

9608130254 960806 PDR ADOCK 05000327 P PDR

MOV Calc No. 2-FCV-63-26 (GL 89-10) Page 2cFL PRESSURE LOCKING REQUIREMENT = 8213 lbs A CTUATORNALVE CAPABILITY EVALUATION CALCULATION: 2-FCV-63-26 Actuator Model (SMBLO'[

Motor Start Torque (MT) ^ ' ,15 filbs Overall Gear Ratio (OGR) l 87.2

• • ~

Pullout Efficiency (PE) 40 %

Application Factor (AF) 0.9 or 1.0 ( s [ly,;fi{

j, Valve Factor (VF) 1.0 or (VF/460)"2 P [0.6656; 375.3VAC h"'O.0'187; Stem Factor (SF)

Max Temperature (Temp) 215 F Loss Percentage (elevated temp) @fD[$% Note 1  !

j Torque Loss Factor = 1-Loss %*(Temp-104)/(356-77) 0.9149 l i

Actuator Torque Capability = (MT

• OGR

• PE

• AF

• TLF

• VF) 318.59 ft!bs SF =

Actuator Thrust Capability = Torque / Stem Factor 17037lbs 0.0187

! Actuator Thrust / Torque Rating f5S661bs E[d500Mfilbs t

! Valve Weak Link Thrust / Torque Rating Q 987[0]!bs SF =

1 932.57 ft!bs 0.0187 Seismic Thrust / Torque Rating fift3E0d]!bs SF =

628.32 filbs 0.0187 Note 1:

Reference:

Limitorque Technical Update 93-03 RESULTS*: PRESSURE LOCKING REQUIREMENT = 8213 lbs ACTUATOR / VALVE LIMITING CAPABILITY = 17037lbs 1 CUT = MOTOR CAP COMMF.NTS:

Rev. Prepared: Checked: /