ML20116J515

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

ML20116J515
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-63-25, GL-89-10, NUDOCS 9608130248
Download: ML20116J515 (2)

Text

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' MOT / Calc No. 1-FCV-63-25 (GL 69-10) Page /oFL

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

,.1 e MOV '1-F C V-6 3 2 5 I Valve type = DD Spilt Wedge i~E ba] =INPQTS*

r

~

ARK No[f024gy VALVE DWG d']93-12869L EPRI NP 6516 Calc Meth 4

VALVE DESIGN DATA theta (A) =l: 20ldeg EPRI MOV PPP INTERNAL DEslGN INFO. Ref.

a = b m n 0.4]

E1 M1

' D1 a= 1.8438 inches ro= 0.625 inches N.5@jf.'87S$ [1.25 l 0.3 a= 1.84375 b= 0.625 inches v= ((D1 + E1) / 2) / 2 =

b= M1/ 2 = 0.625 = ro Mean Seat Dia (D1+E1)/2 = 3.6875 in v= Poisson's Ratio = ""703

,(D)

(d) Stem Dia =

sm 21.625 in v seating surfaces friction coef 10.68 (in)^2 based on Calc method. & EPRI results (S2) Valve Seat Area ((D)^2*Pl/4=

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

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) D1, E1 Packing Load (Actual, average) = . > 90 lbs (PI)

PRESSURE and TEMPERATURE DATA Pbon = lJ 1 s2735l psi (Pb) i P up = =< J2600 psi

s. a)

P down =

' > ma20 psi (Pd)

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

THRUST = [ { (Pb - Pu) + (Pb - Pd) } * {S2} * {Vf} } - { (ST3) * (Pb) } + Pl ] + UNWEDGING Pb = Pressure in valve Bonnet UNWEDGING = [ . Ollbs WHERE:

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)) - Pi } / { (2

• S2 -Vf)- St3 }

PRESSURE = 3879 psi Checked: j[ e Rev. Prepared:

9608130248 960806 PDR ADOCK 05000327 P PDR

.. -L

' )

h10\/ Calc No. 1-FCV-63-25 (GL 69-10) Page 2oFL l PRE 9 SORE LOCKING REQUIREMENT = 8213 lbs

{

CALCULATION: 1-FCV43-25 ACTUR~ ORNALVE CAPABILITY EVALUATION Actuator Model SMB Motor Start Torque (MT) E1 5 filbs Overall Gear Ratio (OGR) 87.2 Pullout Efficiency (PE) M0_l%

Application Factor (AF) 0.9 or 1.0 41]

1.0 or (VF/460)"2 4 0.6100 359.3VAC Valve Factor (VF)

Stem Factor (SF) p$0iO187j f

Max Temperature (Temp) 215 F Loss Percentage (elevated temp) $[2Q]% Note 1 Torque Loss Factor = 1-Loss %*(Temp-104)/(356-77) 0.9149 l l

Actuator Torque Capability = (MT

• OGR

• PE

• AF

• TLF

• VF) 291.98 filbs SF =

Actuator Thrust Capability = Torque / Stem Factor 15614lbs 0.0187 Actuator Thrust / Torque Rating J33600)lbs gjS00,00jftibs Valve Weak Link Thrust / Torque Rating gj49870;lbs SF =

932.57 filbs 0.0187

! Seismic Thrust / Torque Rating

• jl336;00)lbs SF =

628.32 ftibs 0.0187 Note 1:

Reference:

Limitorque Technical Update 93-03 RESULTS: PRESSURE LOCKING REQUIREMENT = 8213 lbs ACTUATOR / VALVE LIMITING CAPABILITY = 15614 lbs i CUT = MOTOR CAP COMMENTS:

Rev. Prepared: Checked: / -

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