ML18151A414
| ML18151A414 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna, Turkey Point  |
| Issue date: | 06/25/1996 |
| From: | Demars B, Jones P, Wolak J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| Shared Package | |
| ML18151A388 | List: |
| References | |
| GL-95-07, GL-95-7, ME-0498, ME-0498-R00, ME-498, ME-498-R, NUDOCS 9607100242 | |
| Download: ML18151A414 (147) | |
Text
-*
Attachment 4 Calculation ME-0498 Pressure Locking and Stem Effect Thermal Binding Analysis For Generic Letter 95-07
(--~-=-=--:--::--=-=-c:-=-----=--c~--
9607100242 960703 PDR ADOCK 05000280 P PDR
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VIRGINIA POWER CALC ADDENDUM COVER SHEET x~:-*.-.7,.J Cale Number: ME-0498 Rev. 0 Add: OOA l
station(s): NAPS AND SPS Units oo Sheet 1 of 15 Addendum Title (Subject): Pressure Locking and Stem Effect and Thermal Binding Analysis for Generic Letter 95-07.
Changes Cale Status'? [ ] Yes [X] No New Status:
Reference Numbers: IR No.: Job No.
Initiating Document: (DCP, IEER, REA, etc.):
Attachments'? [X] Yes [ ] No Labeled I through I Originator: [X] Virginia Power Discipline: Mechanical Engineering
[ ] A/E Firm Name:
EDS Mark Number References'? (not listed in the calc or previous addenda) station Unit System Prefix Sequence Comp. Code Suffix
[~] [01] [~] [MOV] [1842 ] [VALVE ] [ ]
[~] [01] [~] [MOV] [1842 ] [VALVOP ] [ ]
[~] [01] [~] [MOV] [1869A ] [VALVE ] [ ]
[~] [01] [~] [MOV] [1869A ] [VALVOP ] [ ]
[~] [01] [~] [MOV] [1869B ] [VALVE ] [ ]
[~] [01] [~] [MOV] [1869B ] [VALVOP ] [ ]
[~] [~] [~] [MOV] [2842 ] [VALVE ] [ ]
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[X] Additiona Mark Numbers? (Check if "yes") . See .
Objective:
The purpose of this addendum is to include several new MOVs into the original pressure locking calculation for SPS and NAPS. These additional MOVs were determined to be potentially susceptible to pressure locking while reviewing pressure locking effects in segregated/non-segregated parallel flow paths on MOVs during a LOCA.
Conclusions:
This addendum concludes that based upon the Virginia Power methodology for calculating pressure locking effects, all of the newly identified MOVs have positive margin in the event of a pressure locked condition.
Prepared By (Print Name) Date Paul D. Jones Sigr;!Y}.1-v ~"-, t-zs--?6
.,* _-~ . Reviewed By (Print Name)
John J. Wolak Sigr:;:z:,e ~- lt)U Date (p-2)- 9~
II Other (If Applicable Print Name) Sigi:rtiture U Date Bruce F. DeMars ..:i:,:,~
'-z~-.. ,1a (May 95)
.. 1
I I ASSOCIATED INFORMATION ...
.I I CALCULATION NUMBER:
ME-0498 Additional Mark Nos:
Station
[JL]
Unit
[_QL]
System
[__fil_] [
REV.NO.
Prefix/ID MOV ] [
0 2842 ]
SHEET 2 OF Component/ID
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[~] [_Q_L] [__fil_] [ MOV ] [ 1869B ] [VALVOP] [ ]
[~] [_Q1_] [__fil_] [ MOV] [ 2836 ] [VALVE] [ ]
[~] [_Q1_] [__fil_] [ MOV ] [ 283'6 ] [VALVOP] [ ]
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Doc. No.: ME-0498, Rev. O I
/.JJJ 04 Sheet 3 of 15
- OBJECTIVE TABLE OF CONTENTS 4
METHOD OF ANALYSIS 5 ASSUMPTIONS . . 8 DESIGN INPUTS. 9 COMPUTER CODES 10 REFERENCES 11 CALCULATIONS 12 CONCLUSION 15 ATTACHMENT 1 CALCULATION REVIEW CHECKLIST AND ATTACHED REFERENCES
/LIi) k
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498
- ~~
Date:
Date:
Date:
t*-2S--f ~
ft, -ZS-- 9~
li-Z~~t.
08/26/98 4:11 pm
Doc. No.: ME-0498, Rev. O,Ac\o oA Sheet 4 of 15 OBJECTIVE The purpose of this addendum is to determine the effect on valve pullout forces due to pressure locking. NAPS valves X-SI-MOV-X836 and X-SI-MOV-X869A,B and SPS valves X-SI-MOV-X842 and x-sr-MOV-X869A,B are potentially susceptible to pressure locking during a large break loss of coolant accident (LBLOCA).
The method used to evaluate the pressure locking effects are the same as those used in the original issue of this calculation.
Since the original issue of this calculation found that the VP pressure locking methodology is more conservative than the method developed by the Westinghouse Owner's Group (WOG), only the VP method will be used in this addendum *
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498 Date:
Date:
Date:
6-2S--9'-6
~- zs-*-9~
, _21--ffo 06/26/86 4:11pm
Doc. No.: ME-0498, Rev. Otfl3~ OI+
Sheet 5 of 15 METHOD OF ANALYSIS This analysis calculates the expected maximum pullout thrust on.
the valves discussed in the Objective. The pressure locking thrusts are determined with a method developed by Virginia Power.
Virginia Power Pressure Locking Methodology Since pressure locking occurs when the valve bonnet is pressurized to a higher pressure than the flow side of the discs, the resultant force on the valve disk can be calculated based upon this force imbalance. The pullout thrust in a pressure locking situation has five components: 1) the pullout force from static seating which resists valve opening {this thrust comes
- from the VOTES tests for the particular valve and includes the packing load); 2) the bonnet pressure acting on the disk to keep the valve closed; 3) the upstream system pressure acting on the upstream disk which counters the closing force of the bonnet pressure; 4) the downstream system pressure acting on the downstream disk which counters the closing force of the bonnet pressure; and 5) the bonnet pressure acting on the stem which tends to eject the stem from the valve and counters the closing force.
The static pullout force is provided by the stations from diagnostic test results. The packing drag thrust is inherent in
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498 Date:
Date:
Date:
<-z.~-'IC t,- 2$"-f (p b-z~--i"to 08/26/98 4:11 pm
Doc. No.: ME-0498, Rev. o,AJJ oA Sheet 6 of 15 the pullout thrust value. Consequently, these calculations do not include a specific packing thrust.
The pressure forces are calculated based upon the disk surface area that the pressure acts upon. The flowstream pressure is distributed over an area the size of the seat inner diameter or the valve port area. The bonnet pressure acts on a surface area equal to the outer diameter of the seat sealing area. The resulting pressure force equation is:
where: Fpres=pressure force, lbs Pbonnet=pressure trapped in bonnet, psi P~=upstream pressure, psi P~=downstream pressure, psi Seat00=seat outer diameter, in.
Seatro=Seat inner diameter, in.
VF=Valve factor, 0.3 for wedge valves Often, the seat ID and OD are virtually the same. Consequently, in this analysis, the OD and ID are taken to be the same.
The last component in the pressure locking pullout thrust calculation is the stem rejection force. The bonnet pressure tries to eject the stem from the valve. This force reduces the amount of thrust required to open the valve. The stem rejection force equation is:
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498 Date:
Date:
Date:
/r2r--fc
~ -Z.)-9~
,-z ,--,. (.
06/26/96 4:11 pm
Doc. No.: ME-0498, Rev. 0.I ,4-J.,) VA Sheet 7 of 15
- where: Fstemrej=stem rejection load, lbs Ste1non=stem outer dimension, in .
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME--0498 Date:
Date:
Date:
6-2S--~
&, 1-'1tt
'--~--g'"
06/26/96 4:11 pm
Doc. No.: ME-0498, Rev. OJAJJo~
Sheet 8 of 15 ASSUMPTIONS
- 1. All dimensions and diagnostic test results are nominal values. No effort has been made to quantify manufacturing tolerances or include equipment inaccuracies.
- 2. As mentioned in the methods section, the seat OD and ID are taken to be equivalent. This is due to the fact that typical wedge to seat contact is uneven and only a thin line. This makes expected seat dimensions difficult to quantify .
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-<1488 Date:.
Date:
Date:
t-2.~-z~
~-z~ .. 'f~
, _ l,S,-- t_<o 08/26/88 4:11pm
Doc. No.: ME-0498, Rev. O;AJd. ~~
Sheet 9 of 15 DESIGN INPUTS
- 1. The bonnet, upstream and downstream pressures are provided in reference 3, page 17 case 4 and page 49 (NAPS) and reference 4, Table A-7 on page 16 and A2 on pages 1-6 (SPS).
- The pullout thrust for NAPS 2-SI-MOV-2869A is unavailable. It is assumed that the pullout thrust for this valve is equal to the highest pullout thrust of the unit 1 and 2 valves. The highest pullout is 6395 lbs. Consequently, the pullout thrust for 2-SI-MOV-2869A is rounded up to 6500 lbs .
- 3. Motor torques, ~*Ml iae-e~s, operator data, valve stem data and valve port diameters are taken from reference 8 (NAPS) and 6 (SPS).
- 4. The coefficient of friction (COF) used to determine the operator thrust capability, is based upon recent testing
{reference 10). For NAPS the COF is 0.20 and for SPS it is 0.11. 5'-fe,....._ -fo.c+-o,S o..e Cct!cvl~f-ed t/J Jai/-e. 2.. 9-- CAre
~s~J up~ -f-Ae..- Li~.*.J.o,-f"'e_ sl-e....,. ~c_Ar- efu&il.h'rr,,,.
( re +'.ere,... c e. IJ).
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498 Date:
Date:
Date:
~- 2 r;:-176 lb -Z,7-u.
' -- z,j-- 'l~
06/26/96 4: 11 pm
- Doc. No.: ME-0498, Rev. o,.AJ")* 0/J Sheet 10 of 15 COMPUTER CODES QuattroPro version 5 (reference 7) is used to assist in the mathematical calculations presented in the Methods of Analysis section. This simple calculation is independently checked by the reviewer and consequently a sample calculation is not required .
- Prepared By:
Reviewed By:
Reviewed By:
M OV Evaluation/M E-0498
~
Date:
Date:
Date:
6-2.s-f't{
~ - z.~-1 t:,
b-Z.l--tk 08/26/884:11pm
Doc. No.: ME-0498, Rev. 01 AJcl 0.4 Sheet 11 of 15 REFERENCES
- 1. NRC Generic Letter, 95-07, "Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves,"
8/17/95.
- 2. not used.
- 4. Calculation ME-0408, Rev. o, "Minimum and Maximum SI System Flow Analysis for Input to Surry Core Uprating Containment Analysis."
- 5. Tabulation of valve pullout forces at NAPS (attached).
- 6. ME-0211, Rev. 2, Addendum 02A, "Supplemental Thrust Band Evaluations," 3/15/96 .
- 7. QuattroPro for Windows, Version 5.
- 8. ME-0492, "Thrust Band Calculation for North Anna Safety-Related Motor Operated Valves", R.E. Brightup,1/96.
- 9. Tabulation of valve pullout forces at SPS (attached).
- 10. Technical Report ME-0092, Rev. o, "Motor Operated Valve Coefficient of Friction Evaluation Surry and North Anna Power Stations," 10/95.
I/ .
- Prepared By:
Reviewed By:
Reviewed By:
MDV Evaluation/ME-0499 Date:
Date:
Date:
h- -z.r-?£ 6 .. Z.5". 'Uz.
~-2., . . _'"
06/26/96 4:11 pm
Doc. No.: ME-0498,.Rev. o...,AJd. o/-l Sheet 12 of 15 CALCULATIONS All the calculations for the pressure locking evaluation are provided in Table 1. The results show that all MOVs have at least 20.7% margin between the expected maximum pressure locking pullout force and the operator capability at the time of expected valve operation (which includes a degraded voltage condition) *
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0488 Date:
Date:
Date:
08/26/88 4:11 pm
table I -
Pressure Locking Table for Suny Power Station MOVs Upstream Downst. Stem Pullout Bonnet System System Disc Port Disc Valve Pressure Stem Rejection Pullout Force Motor Mark No. Pressure Pressure Pressure OD OD Force Factor Force Diameter Load Force (pres force Torque
-rej ld+po)
Sl-1842 2510 1448 0 3.445 3.445 33278 0.55 18303.0 1.25 3078.7 3553 18777 13
~
Sl-1869A 2510 1448 0 2.875 2.875 23177 0.2 4635.4 1.25 3078.7 2293 3850 13.4 Sl-18698 2510 1448 0 2.62 2.62 19248 0.45 8661.6 1.25 3078.7 3100 8683 12.2 Sl-2842 2510 1448 0 3.813 3.813 40768 0.2 8153.5 1.625 5203.0 1156 4107 12.6 Sl-2869A 2510 1448 0 2.25 2.25 14195 0.3 4258.6 1.125 2493.7 6725 8490 12.1 Sl-28698 2510 1448 0 2.62 2.62 19248 0.55 10586.4 1.125 2493.7 3744 11837 11.7 Stem Operator Capability Capability App Pullout Operator Plant Factor Thrust -Pullout Margin
- Factor OGR Efficiency Capability Avg COF COF=.11 Capability (margin) (%)
0.9 69.56 0.4 326 0.11 0.0097 33710 14933 44.3 0.9 28.2 0.4 136 0.11 0.0097 14087 10237 72.7 t~
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0.9 0.9 38.6 78.81 0.45 0.4 191 357 0.11 0.11 0.0097 0.0160 19750 22328 11067 18221 56.0 81.6
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°'1 0.9 72 0.4 314 0.11 0.0137 22853 14363 62.8
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' ':\ 0.9 41 0.4 173 0.11 0.0116 14920 3083 20.7
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Pressure Locking Table for North Anna Power Station MOVs Upstream Downst. Stem Pullout Bonnet System System Disc Port Disc Valve Pressure Stem Rejection Pullout Force Motor App Mark No. Pressure Pressure Pressure OD OD Force Factor Force Diameter Load Force (pres force Torque Factor
-rej ld+po)
Sl-1836 2600 2208 0 2.25 2.25 11890 0.3 3567.1 1.125 2583.1 4979 5963 13.5 0.9 Sl-1869A 2600 2208 0 2.25 2.25 11890 0.3 3567.1 1.125 2583.1 6395 7379 13.4 0.9 Sl-18698 2600 2208 0 2.25 2.25 11890 0.3 3567.1 1.125 2583.1 4307 5291 13.6 0.9 Sl-2836 2600 2208 0 2.25 2.25 11890 0.3 3567.1 1.125 2583.1 3984 4968 13.8 0.9 Sl-2869A 2600 2208 0 2.25 2.25 11890 0.3 3567.1 1.125 2583.1 6500 7484 13.8 0.9 Sl-28698 2600 2208 0 2.25 2.25 11890 0.3 3567.1 1.125 2583.1 4449 5433 13.9 0.9 Operator Capability Capability Pullout Operator MOV/plan Stem Thrust -Pullout Margin OGR Efficiency Capability Avg COF Factor Capability (margin) (%)
~~~
63 0.4 306 0.2 0.0179 17095 11132 65.1 r~r 63 63 63 0.4 0.4 0.4 304 308 313 0.2 0.2 0.2 0.0179 0.0179 0.0179 16969 17222 17475 9590 11931 12507 56.5 69.3 71.6
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63 0.4 313 0.2 0.0179 17475 9991 57.2
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63 0.4 315 0.2 0.0179 17602 12169 69.1
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~ALV STEM INFO Mark Stem TPI Pitch Lead St Fs Fs Number Diam. COF mu=.15 RC-1535 1.125 5 0.200 0.200 1 0.0094 0.11 0.0076 RC-1536 1.125 5 0.200 0.200 1 0.0094 0.11 0.0076 Sl-1842 1.250 3 0.333 0.333 1 0.0116 0.11 0.0097 S1-1869A 1.250 3 0.333 0.333 1 0.0116 0.11 0.0097 Sl-18698 1.250 3 0.333 0.333 1 0.0116 0.11 0.0097 S1-1890A 2.125 3 0.333 0.667 2 0.0219 0.11 0.0183 Sl-1890B 2.125 3 0.333 0.667 2 0.0219 0.11 0.0183 RC-2535 1.125 5 0.200 0.200 1 0.0094 0.11 0.0076 RC-2536 1.125 5 0.200 0.200 1 0.0094 0.11 0.0076 Sl-2842 1.625 3 0.333 0.667 2 0.0187 0.11 0.0160 S1-2869A 1.125 3 0.333 0.667 2 0.0156 0.11 0.0137 Sl-28698 1.125 4 0.250 0.500 2 0.0134 0.11 0.0116 S1-2890A 2.125 3 0.333 0.667 2 0.0219 0.11 0.0183 Sl-2890B 2.125 3 0.333 0.667 2 0.0219 0.11 0.0183
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- naps VALV STEM INFO Mark Stem TPI Pitch Lead St Fs Fs Number Diam. COF mu=.15 RC-1535 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 RC-1536 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 S1-1867A 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 Sl-18678 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 S1-1867C 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 Sl-1867D 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 Sl-1836, S1-1869A and Sl-18698 are all 3" Velans w/1.125" 2st and 3tpi 5:]:-Z"il3~ s::r,.-z.. ?I~l/lr9- S:r-Z.'8{,79 a re a..J ~o '3 Ve/dn $' ~ / I *J'2.S" ;' Z .s.f_..+,, 3 7'-1"','
RC-2535 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 RC-2536 1.250 3 0.333 0.333 1 0.0116 0.20 0.0140 S1-2867A 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 Sl-28678 1.125 4 0.250 0.500 2 0.0134 0.20 0.0158 S1-2867C 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 Sl-2867D 1.125 3 0.333 0.667 2 0.0156 0.20 0.0179 lls1-2a67D I 1.250 I 5 I 0.200 I 0.200 I 11 0.01021 o.3o I 0.011a
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Doc. No.: ME-0498, Rev. 01 .4-JJ.o/i Sheet 15 of 15 CONCLUSION The results of this evaluation show that the valves analyzed for a pressure locked condition will perform as required even if the expected worst case condition exists. The pressure locking margins range from approximately 20% to 82% *
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498 Date:
Date:
Date:
A'-z.c-9~
~ ~2~-9(,
6&. - z i--- 'f<<.
06/26/96 4:11 pm
Doc. No.: ME-0498, Rev. D/1Jd,vlt ATTACHMENT 1 CALCULATION REVIEW
- CHECKLIST AND ATTACHED REFERENCES
ATTACHMENT 8.5 NDCM 3.7 Rev. 5 CALCULATION REVIEW CHECKLIST CALCULATION NO. REV. NO.
ME-0498 0 ATTACHMENT _1_ PAGE 1 CALCULATION TITLE: Pressure Locking/Thermal Binding Analysis for GL 89-10 A "NO" answer to any questions requires that an explanation be provided.
NOTE: Reference may be made to explanations contained in the calculation.
QUESTIONS YES NO N/A
- 1. Is the calculation number and revision identified [x) on each page of the calculation and attachments?
- 2. Does the objective statement identify the reason [x) for performing the calculation and give sufficient background information?
- 3. Have the sources of design inputs been correctly [x]
selected and referenced in the calculation?
- 4. Are the sources of design inputs up-to-date and [x]
retrievable (and/or a copy attached to the calc.)?
- s. Where appropriate, have the other disciplines [ ] [x]
reviewed or provided the design inputs for which they are responsible?
- 6. Have design inputs been confirmed by analysis, [x] [ ]
test, measurement, field walkdown, or other pertinent means as appropriate for the configuration analyzed?
- 7. Are assumptions adequately described and bounded by [x]
the Station Design Basis?
- 8. Have the bases for engineering judgements been [x]
adequately and clearly presented?
- 9. Were appropriate calculation/analytic methods [x]
used and are outputs reasonable when compared to inputs?
- 10. Are computations technically accurate and has [x] [ ] [ ]
the calculation made appropriate allowances for instrument errors and calibration equipment errors? (Reference STD-EEN-0304)
- 11. Have those computer codes used in the calculation [x) [ ] [ ]
been listed in the "references" or has a state-ment been placed. in the "methods of analysis" section which states - "No computer code used.", if no computer codes were used?
- 12. Have all exceptions to station design basis [x] [ ] [ ]
criteria and regulatory requirements been identified and justified in accordance with ANSI N4S.2.ll-1974?
Comments: (N/A if none) ~~--"'N=A---~~~~~~~~~~~~~~~~~~~~~~
[ ) Additional comment pages added.
P.D* O"llt.*
Prepared By: Date:
JLN 25 -;*%* 11:10 - P.1/5 A 't',4; c H"#'"C6AI", I 'J,/7Z.7/-o/
k--;::'".
wina.tar: ?e,d~ - Ti11,lmer: 2-SI-1.BG91
- At: L~,=-r A-F"V"dRJ:.
Tm lhucr: 9
~;19r Ted late: 4/.ltl$
CPr~,.,.....~
Close Stroke Time 9.961 ssamds 9.918
- t:,D,C s o. /I Z.2'11
- CY~ I. I G e,p;f D~Nd' ,NII' CU>S4 l/""'6c-r,DN ~
Avg Hanning fm,:e -2548 "'9" lumba Force 282Z ~l)-r A41MASIT""Zy APP"g~'?"',.,Ail"'# D~.,,e,1-r~i:MI 1k ,/ lisc l'llllwt Force 4t49
,/
-8295 lhs TON!ft8 ii.
~..- -- -
Setti111 0/C 3.IIV4.IIIII P..Jailal>le Thrust Harg-i11 -0 Ths Spril'! Pack !'reload. lhs
- T9yque S~itch Setting_Open/Close*************** : 3.000/3.000 Limit Switch RotoY Ad~ustaent CV/N) ************* V
- Flow {9pm) Start/Finish ***** ~******************=
- upstream Pressure <psi) Start/Finish *********** :
0/
0/
0 0
,Downstream Pressur~ (psi) St.rt/Finish********* : 0/ 0
- General Comments:
- vtc no. ~SB sens *
. c-clamp 672,Vote5 513,Amp probe 532 Valve Info,sation Valve Act\l.ator Actuator tlotor Plµ11t: ~.J.AS! Actuator Type ** : LlftITORtl Voltage Type; AC
.Unit".: TWO Size *********** : SftB-00 Volts ******* : 460 "Tag Number ****** 2-SI-2869B ftax Thrust Rate: 14000 lbs Allp Yating ** : 2.60 aaps
- Txpe ********.*** GATE Serial********= 115917 Wea. Speed ** 1 1750.00 rpa Size ************ 3" Order 1 ******** : 3458043 Start torqne: 15.00 ft-lb Target Thrust... 0 lbs WOY* Gear Teeth: Run Torque... : 3.00 ft-lb Ori~otation ***** VERT Gear Ratio ***** : 70 Horse Power.: 0.00 h.p.
Location ******** AB 244 PEN SpYing Pack I 22 Bt~m Materi~l *** !7-4PH Stem DiameteY .*. 1.125 inche5 Threads per Inch. -3. 00 ..
!~~s~~~ ;~~ ~ev.: 2 E/Poisson Ratio.: 106.0 x 10E~ psi
, VOTES Seyial i ** ; Signal Conditioner Calibration Due Date 06/2Q/95
- S'FSL Sensitivity J..376E-i>002 fv/v/j,i:; ...
- Vote$ Force Offget
- -2300 lbs
/
Jltl 25 '96 11: 19
~ :
-- ~(:,. - C,'J'<jl ~
A'ir4c..1~r A., c),
rr.,
~
P.2/5 Oo /
,;l.t=F". s:-
- 'Fl~,,~
_As- le;,-, AF1&k.
ci:,r ~~.,,,..,A/&
iH.JuatoP:
Date:
Ut""~ Tas bleP:
Test .1111ier: ,
2-SI-Eft Cor =a /s-rm min:rs Tat lat.e: 511/!i Close a,m SU'Olte Tile 18.~ _ , . fliabTillc 11.1111 lf.l.';GMS
~,-
- Hax lumillf Force t,.,g lmniug lorce
,78
-5ll Ds lhs tliX lumi11 fClfC8 tq lmiug Farce 2.ffifi 748 secoais 1k u.
. Thrust a.t m lisc hllmt roii:i !if 1k
-9* _.., lk Torque II. SettiJU 0/C Z.B/2.IIIJ SpriJU Pack Preloai . )k
- CalilfiliDI ~ ffl. io-ffll Jhs.
T9rgue S~itch Setting.Open/Close *************** , 2.00012.~oo
. L1m1t Switch Rotor AdJustment CV/N) ************ ; N Flow (gpm) Start/Finish************************ : 0/ 0 Upstrea* Pressure (psi>.Start/Finish............ : ~/ O Downstream P~essuYe (p5i) Start/Finish********* ; . 0/ 0 General Co**ents:
W.O.H31'1310-01 THIS IS THE AS LEFT TEST VALUE AFTER UTC. EIG HAS THE DATA FOR TEST 7 AND 8. ESK-6DP-1 REV 4 5/2/~5 @ 0545
- Valve lnforQtion ~lve Actuator Actuator Plotor Plant: NASI Actuator Type** 1 Ll"ITDRG Voltage Typi!: AC
- Unit~: TW.O Size*********** ; SftB-00 Volts******* : ~60
, Tag ilklmber****** : 2-SI-2836 ftax Thrust Rate: 14000 lbs Aap rating ** : 2.60 aaps *
- Type ************ : GATE Serial l ** ~ **** s 115926 Noa. Speed ** ; 1700.00 rp*
Size ************ c 3~ Order 1......... : 3458041 Sta~t toyque: 15.00 ft-lb
- laJ"get Thrust.... : 0 lbs War* Gear Teeth: Run TaYque ** : 3~00 ft-lb Orientation ***** = VERT Gear Ratio***** : 70 HortHt Power.: 1.00 h.p.
Location~~ ****** : AB 244 U2 PEN Spring Pack I 22 St~ Mate~ial *** : 17-4PH Stem Dia~eteY *** : 1.125 inche5 Tt,reads per Inch: 3 .. 00 Th~eads per Rev.: 2 .
E/Poisson Ratio.: 106.0 x 10E6 psi VOTES Serial M** : Signal Conditioner Calibration Due Data 06/20/95
~SL Sensitivity 3.163£-0002 'fv/v/lb
- Jl..Ji 25 '96 11:19 P.3/5
~- \.M DN'd t..oF
~ µf:- -O"'r/<f8 ,C&).c). OQ/
--Tq"blaP: 1-£1-JH--1 A1" 1':4c#l,;M~/' I Test 11mer:,r- l't.
Ted lite: V21/l.5 ~c..:.r-. ~
e.oF :: q, .1¢4
)JIUI Tile 2.213 If.a: biie Janz -m n.s 21 ~~~
ftJ9 lmni11 Jmce -is 1k ,.,, lllmhg rmce r, Dis \~ .\-o \'Z. \ZZ.
>77,# '/.JD7 Tkrut at m ,;/8' as lbc hllmt Fem: .Jr i1._
am 'rolf. oUou.tMJ.. : \'2,. .,it, 11uia11Tllat 711' * ~.4\ 1o twilahle h t lfirsil -12 &
SprilJ Pd Prclaai Ills i- ~ ~ CJ::> ~01f5 ~ . ~~ ~
11
"'\l \tAt.L aflt. "'" *
- 1);.;,k ~ eJ. 6UI~ \cntL SM:>. o\ (/).~ \;) \~ \A111. ~ .m!~s °'" \~.
Torque Switch Setting Open/Close ............... : 61.~n--.se~ '5.f/, f ,5.(/,
Limit Switch Rotor Adjustment (Y/B) ************ : H Flow (gpm) Start/Finish *****..****.*******..*.* : 0/ 0 Upstream Pressure (psi) Start/Finish *********** : 0/ 0 Downstream Pressure (psi> Start/Finish **.*.*.. ~: 0/ 0 General Comments:
VTC A1063 SBN--.6776 LVD'l' 10290 SEH=20.279 SYSTBM 1034 MINI-C 20104 SEN=.6982 CFDS=.00774 TCP'-=l LIMIT CLOSE W/ HOH-LOCKING $Tm1VSTEM NOT.
Valve Information Valve Actuator . Actuat.oi::: MOtor Plant: lllASI Actuator Type ** : Vo1tilg~ Type* AC.
Unit:..: ONE Size ** ********** ; SMB- oo volts ******* : 460 Tag Number ****** : 1-SI-1869B-1 Max Thrust Rate: 14000 lbs Amp rating ** :181 :fJQ amps Z.S T}'I)e ************ : GATB serial# .****** : Rom. Speed ** ~~ :rpm 11(/t/>
Size ************ : J* Order :fl: ******** 1 Start torque:~.e&o ft-lb 1S Target Thrust *** : o lbs worm Gear Teeth: ~ Run Torqu.e ** :4z4A ft-lb .3 Orientation ***** : Gear Ratio ***** : :JL Horse Power.: ~ h . p . \
Location ******** : Spring Pack .* -t.t.:- ~ \J,.,.
Stem Material *** : '1-4 y\\ ...
Stem Diameter *** : l.125 inches \\l '5t Threads pe~ Inch: 3.00 Threads per Rev.:~
.illlllliPoisson Ratio.: 106.0 x 10E6 psi
~ E S Serial# ** : Signal Conditioner Calibration Due Date 08/05/96 BFSL Sensitivity O.OOOB+OOOO ,iv/v/ll)
Votes Force Offset: 1.44 JSV/V
---* * . 'JLN 25 ,96 11:20 P.4/S
/llt;-OV~8 ~~~. oaA
~ Test Results Sullmi)ey A1r"'1crlµ(:;.~ r I PLANT: :HASI Unit: OHE R ,,y=_ s-evaluator:~<<<< z..l,t4~ valve Tag Humber: 1-SI-1836-~
Test Hwnberz 11 Test Date: 2/.18/96 .
- Test COnditions Ful.1 Open Full Closed Flow (GPM) 0 0 Upstream Pressure (PSI) 0 0 Downstreain pressure (PSJ:) 0 0 Motor Volt:age 460. OD Vol.t& .AC
~* ----------------------------------------------------------------
Switch Setting&
Open Torque Switch*Setting 1.250 Close Torque Switch Setting 1.250
~
Durations (aeconds)
Closing Stroke Time 2.064:
Seating "l"ime
-;. ... - O.Z05 ~
Contactor DropOut Time 0.010 Opening Motor eurrenta (amps rms)
Closing Inrush current 12.0 current at Contactor Dropout 2.s Opening .
Inruah Current 12.3 General comments: .,;"' ..,,--
~st verification test - c clamp-20104 sens .6982.cdfs .0077* votes 513 AL'l'MAN Alllt> R.J:ORDAN c-clamp mounted * ,s* f:roc tbreaos - PARTIAL STROKE A~~~..,. AF'?",;e C()p -rF$r~Nl-- ~ F : 0./-¥~
CII/ 64'9 '8 LQS ,/'
(t..lHl-r:e"'°l'r)
Cl~ f/1/ '-A' /
~1 ~9'fet ~ss ./
fer -ns--r #3 ~,,e ~l,/fl.H,vr' ~ SMr,-n:NES., Fvu ~7"~
-~
- ,-11-,,
JV>
.JLN 25 '96 11:20 P.S/5 k>-\&\\ ~ &.F TqW.:,: HI-D
~1:-- d&/'i I Aue), o~ I tm1ae:1 Tat Im:
- JIJS,41 A,r-'l<.#1;,,..1:u.r /
Ip 1711
__...,,,.,. 8,,u:. .J-ltm Till 1119 ICCIIID 1.S IIIClllls tof (J. \\B llaxal*fCEI
,.... lmht fo,ce -tm .
-*. * .,,.. lfnllll&,Jma l5U klmdltllftB U!i II-'
nrust.1tm bllDI! h t llusii
-m Dis/
111/
lisc Pt.Had farm m DI
\.&~
~ . '{.S ~
~.
S,,i11 hcl bcW II
-~ ca
,5.Qi ., , *.z, r.IDN\iul lu,Je: B to-a lk.
- Torque Switch Setting Open/Close ................,.: -i .. 898/1.89&--
Limit Switch Rotor Adjustment (Y/N) ................ : II Flow (gpm) Start/finish......................... : 0/ O Upst~eam Pressure (psi) Start/finish *********** : *. 0/ 0 Downstream Pressure {psi) Start/finish ********* : 0/ 0 General Conments:
SYSTEM A1076 VTC A1038 SEff-.-.6745 LVDT 9712 SEN- 20~408 MINI-C 20086 SEN*.6717 CFDS*.00801 UNTHRD CAL 7/16* BELOW RUNOUT Deff*l.007* LIMIT CLOSE VALVE VITH NON ,
LOCKING STEM/STEM NUT. H~~~~ NOTED. CYCLIC LOADS CORRESPOND TO DRY SLY ;
- RPM. TORQUE SWITCH S E T T ~ THIS TEST COLEMAN/ WARREN R.E.ANGLE .
Valve Informtion 7 Valve Actuator ActuatQr Motor Plant: NASI Actuator Type.a: LIMITORQ . Voltage Type: ;AC Unit.: ONE . Size * .: .......... : SMB~OO Volts ******* : ,460 Tag Number ****** : l~S~*lB69A Max Thrust Rate: 14000 lbs AIDp rating ** : ;z.so_amps Type .............-.*: GATE Serial .f ******* : 115921 Hom. Speed ** : 1700.00 1"PJI Size .*********** : 3* Order, ******** : 345804J Start torque: =15.00 ft~lb Target Thrust *** : O lbs Worm Gear Teeth: 38 Run Torque ** : ;1.00 ft-lb Orientation ***** : VERT Gear Ratio ***** : 63 Horse Power.: :l.00 b.p.
location ******** : AB 244 PEN Spring*Paclc I 22 Stem Material *** : 17-4PH "" .*
Stem Diameter *** : 1.125 inches~
Threads per Inch: 3.00 -
Threads per Rev.: t '
E/Poisson Ratio.: 106.0 x 1DE6 pst-'
- VOTES serial# ** : A6114 Signal,Coridttioner Calibration Due Oat~ 05~9/96 BFSL Sensitivity 2.845E-0002 JlV/V/lb *
- ~~~.~-- " " ! - ~.............,.,... *. - * .*. ... .. *
- C /VIE - ,o 1-rg/
,. . I J eet,i: 0 I * *"
. .. *_A-e1ta~ O A ..
- *.-,~~Y*
'. * * .>...:'Unlt:.:CE
- .;.-;;.! . -. :~ : *_....._._....: 11 ... -,~ I
_... rrtfet.c . n .
. **.. * ~ i, I
.f:..
- 1. : I . .*. ..
. : *..*;tdtiltor:.....- - - - - - - - - * * "Vah1*'f11111 11&.iar. ,11-1842 .. :--_* ..J . _..~. : t*
- ' . ' I M t ' ~
- ...t
- hta* * . *.. *,,,sios.*
- :15 .* .....
q Full 11pa11 . -FUll:Clau:I Flow Cct'IIJ . . .._ ,a* - ... . .a ...... . .. ; *.
Upf.tl'NII p.....,.... <PSI> *D . - .*-a*:*
'DoUnatrem p......u,e (PIIJ o *a *
- NOtor VoltDSle .uo.ao volte N:
- --*--*-*****-**~**-------**----*~*-----------*-*******-----*********~*--
Sllltch lettf11111 ap.n Torqu9 switch lettira 5.000 CLoH Torque SWftdt htti..i 5.000
- 4**-----~-------***************************---------------***************
Stf'Ob: Tl- 15.234 To Clo.. lndlc:atar Light an. ,s.m I *trvke 100.00 Clou Tot,Ja BYJl*d Switch .__,. 1Z.217 l Straka I0.20 To op.rt Indicator Llpt Off *15.23' I strab 100.DO Sutlne Tim 0.517 contactor Dropout TIii& D.022 strcke Tlae 14.932 To Open Indicator Llaht o. MCOllde 14.m I atrob 100.00 Opll'I TOrtJJe Bypu& &witch Clpella aecandl 1Z.23'5 l strab 81.92 To Cloee lrdicator Llgbt Dff lleCGlldl 14.f.!2 I strata 100.00
~~~~~-~~~-~-~~~---*-**-*******-----------*------~=~---------------
Forces Clbe> c:ellbl'at:lon bnae: 515 to -16511 lbs.
Cloatrm llu. Runtng F.arce *9'6' AV(I R1.ndl'IIJ Foree *698 Thrust *t lt*ri of u.dsllllJ -1002 Spring Pack Preload -:S101 Thrust *t CST *7157' Th~t at Coi,iactor Dn;,paut -mt.
~*.
Inertial Thrust -1050 ttaxl- Thnist -10331 Ave I llible Thrust Nargt11 -&&55 Initial Thruat CAt IIOtor ltartJ Dhw Pul Lout force Max R1n1lng Force ~-
AV,, lbnli1111 Farce
- ~**************************-*--------------****-*************-
21.,-
Awraga lwnlrv eu-r.nt 2.1
~~r~~ 111.t cmtactor brGPGUt s.,
- apenlrw 26.1 Current at Mu:t- Pullall:'Foraa J.I Awrep 11\nlhlJ Qrrrerlt z.t Ganaral~l.- .
..*****--*************-**..**-~---------------**--*****--
~
0898~ll ,.EJIGR TIIAIIIIII1TAL 111D RI THRUST W
- ED CLQSED VM.VE LSTl7DOO-UOOO 11AX ALL.tz1DOO nPi\11 lli0-9111 VOTES SYS#Z mJMP USED:10041 IEIIS.5259 Al Ull!ll.00505 DEJ'F USED:\.25 TESTED OIi U CLANP A11P L1SE1h612D i i Tl!STED IIY1'1CNIILLO/RIIIJNDLEY/MCUIILEY ..
~-
- ... ~* .
ME . -o L} qt/ /2.e.v. O Tl* Forte (lbl)
,.,., .Description*
cumnt !Jc/J. o 4 (mecs) (UnCOl'rcGtcd>
- ID181 19.7 NGtDr -start . IJ ..J.J,-, I
- I ,*
224 Z6.1 * -lnnm eurrant
- Pat tr,, ""'- c h ;..... --r 231 284 .
- 10245
-102m i.3 z.e
. I.Oat Notlart llfl(llon (Nur Niddle) r q Q <2...+-
-,a,za 111aerbLC11111tar-t *of .st* ~ i e n
,I
- .*109
- 1198
- 1.Z!& ,*
739.
- .3553*
- *
.~~~ ._;~ :. :.:...,-:.:!~~:~~- :. ..*$.= ....
. 1358 *Z.9 ~- ,*11pentrv*llU'ntr.a:CorD1tien_.ui~:a.,1n*11) : * :.! * .. *} ** * = -
- ,::-'.013 : .. 6111' 3.0
- Dsllft T ~ SypaP lwltch.*Opan& . . . . ::
01Z 12'57 684*
01S 15156 684 J~Z *: ClCIM lrdiir:ator Llllht .Off careen>
011 15156 684 ::s.z 111*1 ln:lir:iitol" Ltght Q'I (lied) 016 15156 684 l.Z . apen Lt.it switch c,par. ""'
- D1'r 15170 717 2.a *Motor C&rNnt eutc1ff co C1 17799 17806 519 574 ff.,
18.5 z.s Motor ltal't ll'll'Ulil current ....
a..t NOtlon 19gtan ClleAI' Nld:ILe>
C2. . 17861 U6 Cf 18222 0 '!.1 Zerall'llll Point for CF cal lbl'lltian C4 1~113 *802 Z.7 cloalna Rwwllr.a Corlilttan (Near lellln'1>
r:, 30016 -169 2.5 Clase Torcp a,,.. Sll1tch OpeM C5 32650 *8" Z.7 Claatr.a llnllng conclfti<ll'I Clear En:f>
C11 32690 -1002 1.6 DIN Motion Steps/ Start of Uadging C13 32810 *3191 2.9 lpf'IIIIJ hCt f t ~ to C.,.... .
C6 33033 -7857. 3.0 Clou Indicator l.lllht an CG--'>
nm -7857 3.D apert IJJdh:ator Light Off (Red)
C8
.,1 C14 33033 -7857 3.0 . CLON Tarcaue htteh Opa\l cor c:sn C15 33055 -8381 3.6. Motor eurrw,e eutoff Cl& 33207 *10331 0.0 Mui.a thrLBt Value J3Z5D *10Z67 . 0.0 Fhwl Thruat V*lua -
'. ~-*. *.J*.:: ~*- -
,-~~-.~:--,----""!~-~-...
.*
- o I
... *:. *: ... _;:-:\"*\<.*:**_:_*. -=;.*_ :, ::***fi!1r-*--~04q?
- -****/ .
.. -.~
- --T~:*U_. 1Ps":]I-1M2-* .**.:_**. : ~ * * . . R--e J/ O 11-Jd~ o.
- . . ~
l Hf .. /
...9/H*
- A--f-rn.c...h "'-._.e /1. I JB:$!2Z f_~+er-e/lce _7' Q\L]llftl'B' IICmal .. ~"" a. a..'.'1.s., ,"]'\ ,f~.~ °t *\S. 4il>
-WSS.1 ma) . .
A. S. L c. ~-r ~
,-"\I
,., ,rt\"u
~.ST~-\\: -, ,s C -
-n:>T=-1.\, o'2.J~- -=
[?\..~¢-,q'4
-8.MZ Ull ~,i..()A \:> ?c "3z.4 Z.
(=cn.c.t: S~s OQ
- TOrtJJe SUlteh S.ttine Cpen/Cloee *************** 1 5.000/5.GOO Lla1t switch Rotar Adjl.lllt.flnt CY/NJ ************ 1 I L-s-r .""
~-r:. it 10"30. 5 J.. ,-, Ll 7 R \.. . -=- ~ r<D e Flow c;pm> ltarc/Finiah ******* , **************** a . DI Cl Upstr..- Pr...ure (pef) ~rt/Finlah *********** 1 DI o*
DCllalllltr... Pressure (pel) ll*rt!Finilllh ********* 1 OJ o*
General~*=
WOl290898*03 DOR TRAllflMtnAL USED fCR TIIIU&T IIAIDC LIMITEll Cl.om> VALVE LSff7000--12000 MAX ALL."21DDO IYP.US 80-D VOTES IYU2 /CLAMP USED110D41 ~s.5259 Al UIIE).D0505 DEFF U9£Dr1.25 TESTED Clll U CUJIP AMP U1lBh6120 Yo.lv. lnfwaatiOh Valve Anuatw ACtuator llotor Plant: IMIRY Aotuat.- type ** a WN/6111 vol teee Jype: N; U'ilt.z ONE llze*********** t INB*IIO Volts ******* : 460 Ta; l ~****** 1 Sl-1842 lltp rating ** , 3.50 aq,a TYJJe************ 1 GATE a.rial , ******* 1 260351 lea. SpNd *** 3400.00 rpa Slze ************ 1 4 IMCII Ordlf' I.******* I JAZ95GD ltar1: ~ 15.00 ft-lb Tar9et Thrust *** : 12834 l~ uoril Gear teeth1 40 Rift Torq&>> ** r 3.IIO ft*lb Ortent~tlon***** : IIIORIZ. i;.,ar llat1D*****I 28.2 lloNe PoNM-.1 ,.vu h.p.
Lcc:ati an. ....... : AB z* LEVEL 112.
BtGII Mater-ial *** 1 17*4PI steai Dl11ater *** 1 1.250 lnchee Thrwdtl per Inch: 3.00 throlldsl per lw.1 1 E/PotNon Ratio.a 106.0 x 111£6 pal voTf8 StrfaL t .. 1 M692 lflnal CandltllllrWI' C.UbratiGn DUI Pate 12/Ulm FIL 8-hlvlty 3.741E-D002 lff/'11/Lb .
- wx. StNOr Dff-t: -'139.55 ll:a *
&pare ChiWwl Dff-tl D~35. ih
.. ~l1'!t\l!-I:
................. . ~ * ****Q~.--.t~; '. ****~'!#$$.;.l}..f, l-11JS~~,y 5 ~/!?./'t.50* t/HJf O.RI~
.....9.y,,t{t:/Jl*** e...............................
": *VA POWER NCMWB036 c...h *f SURRY !-...e._ 't- - ~- W/0 TASK : 00308182 01 "f ~ -;;}_
.. 0 R ! G.I*N AL -PRINTED.O /22 1995 .PAGE 01 OF.OS WR TAG: PROG-M007-5 WR TAG LOC: NOT HONG l)~"fl:. *
.. ### ### ## ## ## ## ## ## ## ## ## ## ## ## ## *##.## ## ## ## ## ## ## * /"'
- ## ## ###### ## ## ## ## ###### ## ## ##### ###### ## ## ## ## ## ###### ## ## * ~'::>
- ~*==::*;;:~;:;;::::~;:;::.;:;~;:************************************~;_;:-~;;*::********************************: &/)
- MN DESC: HHSI TO HOT LEGS tJTC NUMBER: * *
- BOM ITEM NO:
- MFR: L553 MODEL NO,: SMB-00,345804I SmuAL NO :
- ITEM QCL: * *
- TASK TITLE :
- RE-SET TORQUE SWITCH TYPE: PLANNED MAINTENANCE SR TASK: Y
- L.::.::_f,;:~f-=-~~:::.:.:.==--=-:_:___Safety_Ralated TASK PROBLEM DESCRIPTION:
TORQUE SWITCH NOT SET IAW REVISED DRP INSTRUCTIONS,l-DRP-007 PL/PL TASK PRIORITY: 4 *
~-~-;;;;-;;;;;:;******:*~:::..~=~~-;~--~"'.::~~~~-;;;;;;;;-;;;;:;;~---~-~---**-~
- REG l.97 Y APPEND R N APPEND R 11REA: 17 MRSSC: Y *
- ISI REQD
- TECH SPECS :
- SEISMIC Y *
- NPRDS ITEM y INSUL COMP :
- TECH SPEC EXPIRATION DATE/TIME:* * .
- TASK INFORMAT I ON
- y
- RWP REQD y . CONF ENTRY N IND SR N ENG REVIEW y *
- SECORE REL N COATING REQD N ENG DES DOC DRP-007 *
- RWP NUMBERS 95-3025 * * * *
=;~7=~:;;;~====;~;;;====caacaa=asa**;*aama=cm=as*n*a*mamaaa=*=**Emamaa*a******=**c;;7=;a;:;7*;a=*;;;;m;;;;7a;~amc~=:
- W/R SUBMITTED BY: . * *
- DEPT:
- TROUBLE/BREAKDOWN: N
- W/R APPROVED BY : * *
- DATE: * *
- QC NOTIFIED DATE/TIME: 5.,,.~r,,Q.*~ *
- TAGGING VERIFIED BY: ---f.~\h...-_JL~d,~C:::::::::::::::::::======--=_,,-_.:::,_ DATE/TIME: q !t '-f/Cf<( / /Cf;J C/ :
- =============================== _ ===*====**=ccacaamsmaaca***==**a*mamaa*====J==cacmm=*====*=*=accamcmm=====*
- C../t *
- TAGGING REPORT NBRS: 5/,...fS- -S/-ZO 51-?s-~5}' *
- SPECIAL NOTES WORK SAFE! I *
- **NOTE** CONTACT SYSTEM ENGINEER A.WRIGHT AT EXT. *
- 2747 OR JIM STAUFFER EXT. 2558 FOR ANY QUESTIONS *
- ***NOTE*** DENATURED ALCOHOL TO BE CARRIED INTO THE *
- RCA ON SATURATED RAGS, IN PLASTIC BAGS ONLY. 11 *
- TASK JOB S T E P S *
- STEP NO STEP DESCRIPTION CRAFT REQUIRED HOURS TOT HOURS *
- Ol SURVEY,SET-UP AND RECLllMATION HP .2 4.0 8.0 *
- 03 CONTACT (MOV) COORDINATOR PRIOR TO STARTING WORK ELEC 1 O.l 0.1 *
- 04 VERIFY PROPER MARK# ELEC l O.l 0.1 *
- 05 SET UP WORK AREA ELEC 2 0.5 1.0 *
. r----------**
~(* .
.i\ \ /
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\.__!
________ :i.-
Test Results Sl.lmlllry Unit: ONE M ~ -o 4q ~ '2-ev*** S 4-JJ o,4-Valve Tag Num>er: Sl-1869A Test NLm>er: 27 f/-Hoc_),~ I Test Date: 9/14/95 Full Open Full Closed R_e~-CJ loW CGPM) 0 0 Up8tream Pressure (PSI) 0 0 powr,stresm Pressure (PSI) 0 0 Motor Voltage 440.00 Volts AC
- m***************
Switch Settings Open Torque Switch Setting 5.000 Close Torque Switch Setting 5.000 Durations (seconds)
Closing Stroke Ti111e 9.810 To Close Indicator Light On seconds 9.810 X stroke 100.00 Close Torque Bypass Switch Opens seconds 2.524 X stroke 25.73 To Open Indicator Light Off seconds 9.810 X stroke 100.00 Seating Ti111e 0.104 Contactor Dropout Tiine 0.013 Opening Stroke Time 9.743 To Open Indicator Light On seconds 9.743 X stroke 100.00 Open Torque Bypass Switch Opens seconds 2.454 X stroke 25.19 To Close Indicator Light Off seconds 9.743 X stroke 100.00 Contactor Dropout Tiine 0.021
~Forces ___ Clbs)-----------Calibration-Range:-1674-to--16176-lbs.--------
Closing Max RLn'ling Force -2368 Avg RLn'ling Force -2037 Thrust at Start of Wedging -2368 Thrust at CST -4912 Thrust at Contactor Dropout -5979 Inertial Thrust -2843 Maxi111111 Thrust -8822 Available Thrust Margin -2543 Opening Initial Thrust (At Motor Start) -9083 Disc Pullout Force 2293 Max RLn'ling Force 2293 Avg RL"'lning Force 1976 Motor Currents (aq,s MRS)
Closing Inrush Current 15.3 Average RLnling Current 4.0 current at Contactor Dropout 3.0 Opening Inrush Current 16.8 current at Maxiaun Pullout Force 4.0 Average RLnling Current 4.0 General COR111ents:
- 308182-01 RESET TQ SYITCH. NO ADJUSTMENTS MADE. TEST 25 TV YITH JUMPER
- .26 YITHOJT JUMPER AND TEST 27 FULL STROKES AS LEFT.
e-CLAMP USED 10041. SENS OF .5259 AND A.S. OF .00505: SYSTEM 2 USED
,.., #124. TESTED BY L.D., J.B. , AND D.N. NIGHTSHIFT"9715/95
fl;*
/
./
03 04
/
1115ecs>
81 86 231 451 685
- Force ( lbs)
(Uncorrected)
-9015
-9102
-9367
-9190
-376 Current
<~ nns>
9.6 16.8 3.9 4.2 4.3 Description
.Motor Start Inrush current Peak Lost Motion Region (Near Middle)
HB11111erblow/Start of Stem Dec~ression Stem C~ression Fully Relieved ftt E cJ19o, R.e i/, o lf-/-b ci ~ J-J
)
JdJ o4-rR 013 742 1031 2361 2288 4.0 3.8 MaxillllLlll force at Disc Pullout Opening Rl.n'ling Condition (Near Begin'g) e.e~- 9 012 2535 1998 4.4 Open Torque Bypass Switch Opens 014 9308 1926 4.4 Opening Rl.n'ling Condition (Near End) 011 9824 2071 4.3 Open Indicator Light On (Red) 015 9824 2071 4.3 Close Indicator Light Off (Green) 016 9824 2071 4.3 Open Limit Switch Opens 017 9845 2071 0.9 Motor current cutoff co 13785 1926 6.9 Motor Start C1 13790 1998 15.3 Inrush current Peak C2 13982 2071 4.2 Lost Motion Region (~ear Middle)
C3 14218 68 3.8 Tension to C~ression Transition CF 14219 -o 4.0 Zeroing Point for CF Calibration C4 14789 -2074 4.2 Closing Rt.lYling Condition (Near Begin's)
C7 16309 -2074 3.7 Close Torque Bypass Switch Opens cs 23011 -1848 4.2 Closing Rt.lYling Condition (Near End)
C11 23558 -2300 4.0 Disc Motion Stops/ Start of Wedging C14 23595 -4844 4.3 Close Torque Switch Opens (or CST)
C8 23595 -4844 4.3 Open Indicator Light Off (Red)
C6 23595 -4844 4.3 Close Indicator Light on (Green)*
C15 2360B -5911 3.0 Motor Current. cutoff C16 23662 -8754 a.a Maxh1u11 Thrust Value C17 23822 -8582 a.a Final Thrust Value
- ~*
~y
.J
"!26 *Tag: SH.B69A wor.u O(P,£(2 cop/
- 141$ 1
'1,3:Jl:11 ' /VI £.-04?"8, -i'...evc O Tv'. u),',t\oJ+- J.., fVI.P',
CALIBJlffl'OB/ A-JJ o 4-- I D:SDIOOR ~Jt~/ C. l'-l CIC,,
-!llf.J.4 (lbs) t.~+ ct \/crrr..s Si.,-,So<"'
448 95"" q.,-33, P,.,J"'f( SE..rJSO< 5'0'2..L{ q533, Cl'S CL ars OL Tile in Seconds 1.168 Torque Switch Setting Open/Close *************** : 0.000/0.000 Limit switch Rotor Adjustment CY/N) ************ : N Flow (gpm) Start/Finish ************************ :
Upstream Pressure (psi) Start/Finish *********** :
0/
0/
O O
Downstream Pressure (psi) Start/Finish ********* : 0/ O General COl!lllents:
Valve Information Valve Actuator Actuator Motor Plant: SURRY Actuator Type ** : 9BN/6BX Voltage Type: AC Unit.: ONE Size *********** : SMB*OO Volts ******* : 440 Tag Nuimer ****** : SI*1869A Mex Thrust Rate: 14000 lbs Aq:> rating .. : 2.70 Bq)S Type ************ : GATE Serial# ******. : Ncm. Speed ** : 1750.00 rpm Size ************ : 3 INCH Order# ******** : 3458041 Start torque: 15.00 ft-lb Target Thrust *** : 9075 lb& Wonn Gear Teeth: 25 Run Torque ** : 0.00 ft*lb Orientation ***** : HORIZ. Gear Ratio ***** : 28.2 Horse Power.: 1.00 h.p.
Location ******** : AB BASE. Spring Pack# 022 Stem Materiel *** : 17*4PH Stern Di11111eter *** : 1.250 inches Threads per Inch: 3.00 Threads per Rev.: 1 E/Poisson Ratio.: 106~0 x 10E6 psi VOTES Serial# ** : A4536 Signal Conditioner Calibration Due Date 12/08/95 L sensitivity 1.250E-0002 ~v/v/lb
- Sensor Offset:
- 1309. 73 lb&
~r__e Channel Offset: -Jl.00 in
-* 1t*1r: trµ,t;-p~ .cr115./9s r2e+ 0 Ni \:i 1-l,AL 1
9 r, E-o 'I",~ v- o J.~****~******~t'tl"~**}"J'"~**********J1**T*~*~fJ.!:!*******:**************~~~
/fT:Y# *'-rl.110 TASK , OQIU56M_JU. _.,,E ~
~
PR:mTED 08/22/1995 PAGE 01 OF 05 WR TAG: PROG-M005-5 WR TAG LOC: NOT HUNG '"(~
- .fti~-re..~ *******
... 7 MJUlK NUMBER: 3e.;,01-'Sl:-MOV-'.l.869B-.VALVOP- 'QUIil, c"CLASS: iSR*
MN DESC: CHARGING PUMP DISCHARGE*TO LOOP tlTC NUMBER: *
- BOM ITEM NO: * -MFR: L553 MODEL NO,: "SB-00,3A5149C SERIAL NO:* ITEM QCL:
- TASK TITLE :
- PER.FORM VOTES VTC AND RETURN TO SERV. TYPE: PLANNED w.INTENANCE ~slTASK:"-Y*
LOC GRID X/Y: 7.3 LOCATION CODE: AB J ELEV: 2
- AUXILIARY BUJ:LDING VIMS FR:
LOCATION DESC: 20 Fl' SOUTH OF GATE 1, 15 Fl' EAST OF CONTAINMENT
=========c=aa======~::C:~:mc*m*a*****=*********D***-*******************D*m*********mD WALL, 3 FT &af~ty*c*RllalmJ" *
- TASK PROBLEM PER.FORM VOTES VTC AND A VOTES RETtlRN TO SERVICE TESTING
- I, T.
- DESCRIPTION: PL/SV
- RETAIN FAILED EQUIPMENT FOR CAUSE DETERMINATION /EVALUATION *
- ==c==============================**==========*=a===**mDmaca=~=****camcmaaac:a**===*==*======*==***==*=*====================*=*
TAGOUT REQD N WELD/FL REQD N ASME PRGM y DEV RPT IND
- N
- RWP REQD y CONF ENTRY N IND SR N ENG RE'll:EW y
- SECURE REL N COATING REQD N ENG DES DOC : * .*
. RWP NUMBERS 95-3025 * * * *
===============================*=aaccccmcccmmmcccaaamaaaammmaa***=*=*===*=*acacaaammaaa~c***oaca*mmmcmaamc=========*==aaam::**
PLANNER: GENNFBO BOOZE N UCR: 5 LMD: E TASK TYPE: SV *
- W/R SUBMITTED BY: * *
- DEPT: *
- TROUBLE/BREAKDOWN: N *
. W/R APPROVED BY : . *
- DATE: * *
. TASK S I G NA T U R E S .
OPERATIONS rob ---- DATE/TIME:
LCO
~llr,fff
,VCJ I o'3so
- f)of) t~ ,, 9/1~/Ffto ?tra
- QC NOTIFIED /7d ---- DATE/TIME: *
- TAGGING VERIFIED BY: ,.I ,A ---- DATE/TIME: ~.A- I ,-./ u:i
- TAGGING REPORT NBRS: ./1//12 I
- SPECIAL NOTES WORK SAFE" *
.* **NOTE** DENATURED ALCOHOL TO BE CARRIED INTO THE (RCA) ON SATURATED RAGS,IN PLASTIC BAGS ONLY. I I I I
- TASK J O B s TEP S
- STEP NO STEP DESCRIPTION CRAFT REQUIRED HOORS TOT HOURS
CONTACT(MOV)COORDINATOR PRIOR TO STARTING WORK HP
"-,J:~
2 2
1 4.0 0.3 0.1 8.0 0.6 0.1 04 VERIFY PROPER MARK # ELEC 1 0.1 0.1
- 05 SET UP WORK AREA ELEC 1 0.5 0.
- 07 PERFORM VTC VOTES TEST ELEC 2 5.0 19
- 08 PERFORM RETt1RN TO SERVICE VOTES TEST ELEC 2 S. 0 .1r
- 1t***~*'*~*.1rlir+'***-, ............................................................................................ .
.. . 1*.>, , . r: .... , i ** .
- ' *~ .,,- : i_ I *- , "" I I I.
AUG 241995
'*-* '._\:------------..Jl-
Test Results Sunnary Unit: ONE Valve Tag Nurber: S1*1869B Test Nurber: 13
/VI£ -049 ~ £..e (/_ 0/ A-J} 04-Test Date: 9/16/95
/+-~ c L---:1- I Full Open Full Closed Flow (GPM)
Upstrean Pressure (PSI) 0 0
0 0
R..e+_ 1
~ownstream Pressure (PSI) .o 0 Motor Voltage 460.00 Volts AC Switch Settings Open Torque Switch Setting 5.000 Close Torque Switch Setting 5.000 Durations (seconds)
Closing Stroke Time 8.525 To Close Indicator Light On seconds 8.525 X stroke 100.00 Close Torque Bypass switch Opens seconds 2.731 X stroke 32.04
.To Open Indicator Light Off seconds 8.525 X stroke 100.00 Seatfrlg Time 0.293 Contactor Dropout Time 0.017 Opening Stroke Time 8.261 To Open Indicatcr Light On seconds 8.261 X stroke 100.00 Open Torque Bypass Switch Opens seconds 2.069 X stroke 25.05 To Close Indicator Light Off seconds 8.261 X stroke 100.00 Contactor Drcpout Time 0.011
.Forces ___ Clbs)-----------Calibration-Range:-224-to--16626-lbs.---------
Closing Max Running Force -525 Avg Running force -184 Thrust at S~art of ~edging -525 Thrust at CST -1531 Thrust :t ~cnt3cto~ ~ropo~t -2012 Inertial Thrust -2586 MaxinU11 Thrust -4598 Available Thrust Margin -1006 Opening Initial Thrust (At Motor Start) -4n.7
.Disc Pullout Force 3100 Max Running Force 930 Avg Running Force 2n.
Motor currents <~ nns)
Closing Inrush current 26.3 Average RLlrVling current 3.2 Current at Contactor Dropout 3.5 Opening Inrush current 27.0 current at MaxillUII Pullout Force 3.1 Average Rl.n'ling current 3.0 General ccaments:
15684-01 TED CLOSED VALVE >C11 MAX ALL.#14000 BYPASS 25-35% BOTH DIR.
VOTES SYS#2 /CLAMP USED:10041 SENS.5259 AS USED.00505 DEFF USED:1.25
'TESTED ON U/ CLAMP AMP USED:6120 TYPE STEM: GP TESTED i'C.;J'CAMILLO/TCOYNE
1=
. < cs)
Force Clbs)
(Uncorrected) current CBlll>5 19.6 nns)
Descr;pt;on
~Motor *start i
fa£ -04 9 f!.eu~ o
- 1-)J off 215 -4727 27.0, Inrush current Peak 221 -4598
-4468 2.4 Lost Mot;on Reg;on (Near*M;cldle) A +b C-(-.,J I 282 Hanmerblow/Start of Stem Deca11Press;on
-4336 3.2 o3 05 486 849 -o 3.0 Stem Takes up o;sc*Clearance Maxinun Force at o;sc Pullout Re+ 4 890 3100 3.1
~ epen;ng Rurv,;ng cond;tion (Near Beg;n*g) 1050 310 2.9 013 2.7 Open Torque Bypass sw;tch opens 012 2284 155 open;ng Runn;ng cond;t;on (Near End) 8409 310 2.7 014 2.8 open Ind;cator L;ght On (Red) 011 8476 155 2.8 Close Indicator L;ght Off (Green) 015 8476 155 2.8 Open L;m;t sw;tch epens 016 8476 155 3.0 Motor Current Cutoff 017 8487 310 310 12.7 Motor Start co 12954 Inrush current Peak 12964 155 26.3 C1 2.4 Lost Mot;on Reg;on (Near M;cldle)
C2 13017 310 Zero;ng Po;nt for CF Calibrat;on 13298 -o 3.2 CF Clos;ng Rurv,;ng Ccnditfon (Near Beg;n*g) 13718 -177 3.2 C'4 3.2 Close Torque Bypass sw;tch Opens C7 15685 -177 Clos;ng Rum;ng cond;.t;on (Near End)
-177 3.1 cs 21369 3.2 Disc Motion Stops/ Start of .wedg;ng C11 21409 *525 Close Torque switch Opens (or CST) 21479 -1531 3.6 C14 Close Indicator L;ght*on (Green) 2~479 -1531 3.6 C!,
3.6 open Ind;cator Light Off (Red)
C8 21479 -1531 3.5 Motor current cutoff C15 21496 -2012
-4598 o.o Max;nun Thrust Value C16 21702 Final Thrust Value 21742 -45913 o.o C1i
--r7-u1 J* er 1JNIT TWO ~ORIGINAL
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HARK Nll'll!ER: 38-02-SI~..,.2942-VAL.VOP- lilUAL a.ASS: SR
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~ DESC: ALT tHiI iO ~ L6S *
- UTC NJtBER: *
.* BOl1 I1EN NJ:
- TASK Till.£ : ADJUST VALVE STROKE 1'FR: ~ HODEL NO. : SNB-<), 3'15629C8 SERIAL NO:*
TIPE: UJRt<EC rIVE ffi.' tNTENANCE I1EN 1illJAL CL:
SR TASK: Y
- == =: ~-.=c:r...':~ .. ~ ~~fety Kela . d
- LDC GRID X/Y : 10.~ J El.EV: 2 Vl"5 FR:
- FT -= tF ERST * .-_.....
- TASK PRDBL.El1 VALVE FAILS 100 LBS.AIR TEST FDR BACK TASK PRIORITY: ! *
- ----==----------=. . .
DEStRIPIION: LEAKAGE,NEED TO AD..llST STROKE VALVE SEAT wt£N HAND TDl~JED *
- Eli! torr CO/ctl y Er.I RELATED
=-.....
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Hl.ltlAN FACTORS:
- APPEND R Pm:A: 17
~--. =---.. .=------=------
ENVIROi'ft:NTAL ZOIID:'.: All-2A ttRSrn; : Y
- ISI REG 1,97 N APPEND R SEISNIC : Y
- NPRDSREtm I1Et1 y
TEI:H SPECS INSUL cot1f'
- TECH SPEC EXPIRATION l>ATE/Tlt£: * *
-=-==-.., ....=,===----==--==-==-===--= * .....=-i::m==-====,-=- ~. ., , ~.:,-=--===-==-===-===-===tt*
TASK INFORHATION **
- TAGOUT REm> y WELD/FL REm> N A5t1E PRGl1 y DEV Rf'T IND
- Pl1T 161D y 5CAF REDD N INS REM REm> N DEV WI" ~*s : "' . *
- RWP RSID y CONF ENTRY IND SR ENG REVIEW ,.. <<**
- ~-====-==-==---~-=....,._,. .
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- RWP MJHBERS *
==-=====-~*->.;
- PLJVeER: tiENHFBO BOOZE N U:.:R: :5 LftD: "E TASK TYPE: Cl'1 W/R 6UBtfITTED BY: t£RRY w* DEPT: OPS TRDUBLE/;iREAKDIJWN, N
- W/R N'PROVED BY: BOOZE N l)AlE: 03/14/1995
-======i=====-===-========--==-=========::=:. *:.: .:;.:*=-==-===============-
TASK SIGNATURES OPERATIONS ~~~~-==========~- ~':-!t1.¢~-, n ( *
- =1)0})
EiC NOTIFIED DATE/TI!'£:
- TACGINt: VERIFIED BY: DATE/Tit£:
- TAGGIIUEPllRT NJJ116, .;2. -J!:" -s::r-1. f' c -*- *- __ I _ _ *
- ------======-=-------====----===----=======-, -
SPECIAL NOTES - NOTE ** DENATURED Al.mtm. TD BE CARRIED INTO 11£ CRCA) ON SA~TED RAGS,IN PLASTIC llAliS ONLY.!!!!
"*=*-=-==--==---=----=--***
- WCR< SAFE!!
. .-==------------------:.,* * ~
T A 5 K J O II 5 T E i" S 6TEP NO Q<<Wl" TOT Hlllffi STEP DESCRIPTION RElil.llRED tllJUR5
- 01 SURVEY ,SET-tlP AND IEl..ANATIDN HI" 2 4.0 e.o
- 02 REVIEW WDRlt .PACKAGE, <PHT> RSIUIRP£NTS AND <RWF'> El..!::C 2 0.3 0.6 *
- ELF.C 1 o.t 0.1
- 03 04 CONTACTUIJV>COCRDINATDR PRIOR TD START!~ WCR<
VERIFY PROPER NARK~ EU-::C 1 O,'l 0.1 *
- 05 06 6ET lP WCR< MEA VERIFY aJIIFDl£NT 16 PRIJPEffl..Y TAGGED El.l*:C EJ_r.f.:
1 1
0 .. 5 O.i o.:s 0.1 ..**
- 07 FIE,IAW VPAP-1302 EL~C 1 0,.1 0.1 08 ADJUST VALVE STROKE ELEC 2 1.0 e.o
- 09 Cl..Et1IJN WORK AREA,RELEASE TA!iS AND CLOSE WT<PHT> ELi:.1: 1 1,1) 1.0
- 10
- 11 D0CU£NT WCR< PERf1JRl1ED AND MATERIALS USED ali1Pl.ETE ALL PN'ER WORK AND REVIEW WORK PADCA£iE El£C EJ.1-:C 1
1 1.0 1,0 TOTAL E:t'iT HOURS:
1.0 1.0 20.5
- N************a*****************NNNNNNNN******N*NNNANNNNr~~~JMHHHHitl-NNN******~~~*************NNNNWN*NNNNNNNMN***
/
Test Results SUllll8ry /1A E-o 4-C/i, Re r. o .Jt}J 6(1 Unit: TY> '/ /
".,., 0 .,1.,,C:-~ Valve Tog....,.., Sl-21142 ft.Ko. ( hM .-:/ I V"--ly :
Test Num>er:
Test Date:
18 3/15/95 f2.e+-e.r~-1 Test Conditions Full Open Full Closed Flow (GPM) 0 0 Upstream Pressure (PSI) 0 0 Downstream Pressure (PSI) 0 0 Motor Voltage 460.00 Volts AC Switch Settings Open Torque Switch Setting 5.000 Close Torque switch Setting 5.000 Aul S6N_,
--- liar~ s E:N. ,
-- ---Durations (seconds)
TS T :. '3 7 48' G Closing Stroke Time 9.323 /IIIA't : c}~,0 L,& I To Close Indicator Light On seconds CJ.323 X stroke 100.00 Close Torque Bypass Switch Opens seconds 8.565 X stroke 91.87 _ ) .QI q1'"7 To Open Indicator Light Off seconds 9.323 X stroke 100.00 idTA -: ;
Seating Time 0.152 Contactor Dropout Time 0.012
'Opening Stroke Time 9.030 To Open Indicator Light On seconds 9.030 X stroke 100.00 Open Torque Bypass switch Opens seconds 8.489 X stroke 94.01 To Close Indicator Light Off seconds 9.030 X stroke 100.00 Contactor Dropout Time 0.016
- Forces <lbs) Calibration Range: 1517 to -20973 lbs.
Closing Max Running Force -6137 Avg Running Force -2276
- Thrust at Start of. Wedging -153 Thrust at CST -1523 Thrust at Contactor Dropout -3186 Inertial Thrust -15507 Maxinun Thrust -18693 Available Thrust Margin -1371 Opening Initial Thrust (At Motor Start) -18344 Disc Pullout Force 1156 Max RLl'llling Force 763 Avg Running Force 467 Motor Currents <~ rms)
Closing Inrush current 25.4 Average Running Current 2.4 Current at Contactor Dropout 2.5 Opening Inrush current 25.5 Current at Maxinun Pullout Force 2~2 Average Running Current 2.3 General comnents:
31ffl!!*1!1 BYPASSES SET AT 90 TO 95 X BOTH WAYS. SYSTEM #2 USED 6
USED A1176, SENS. 5494; TV DEV SENS ** 00406 TESTED ON SOLID
. TRANSMITTAL USED TO SET THRUST BAND. (A.WRIGHT) ATTACHED.
- LIMIT RESET TO SUPPORT 16.4 GROOP TO REDUCE LEAKAGE.
PREVIOOS CAL ENTERED FOR FORCE SENSOR. NON-LINEAR TESTED BY:CAMILLO/HUNDLEY
/
/
!Yl£-04q? fl.ev .. 0/ AJJJ,1 ft#c..c. h ---9'--- I Force E-lbs) current Description (Uncorrected) C~ nns) ~e~. CJ
-18344 22.3 Motor Start 45 -18344 25.5 Inrush current Peek 92 -20950 4.9 Hemnerblow/Stert of Stem Dec~ression 02 101 -15877 2.1 Lost Motion Region (Neer Middle)
OS 561 200 2.4 Stem Takes up Disc Clearance 09 650 1156 2.2 Mexi111111 Force et Disc Pullout 013 981 478 2.4 Opening Rl.l'll'ling Condition (Neer Begin's>
012 8530 374 2.2 Open Torque Bypass Switch Opens 014 8911 263 2.4 Opening Rl.l'll'ling Condition (Neer End) 016 9071 226 2.3 Open Limit switch Opens 011 9071 226 2.3 Open Indicator Light on (Red) 015 9071 226 2.3 Close Indicator Light Off (Green) 017 9087 200 2.3 Motor Current Cutoff co 12833 469 8.9 Motor Start C1 12845 410 25.4 Inrush current Peek C2 12897 427 1.9 Lost Motion Region (Near Middle)
CF 13317 0 2.3 Zeroing Point for CF Calibration C4 13356 -5484 2.4 Closing Ri.ining Condition (Neer Begin's>
C7 21398 -2734 2.4 Close Torque Bypass Switch*Opens cs 22092 -153 2.5 Closing RLllning Condition (Neer End)
C11 22132 -153 2.5 Disc Motion Stops/ Start of Wedging C14 22156 -1523 2.6 Close Torque Switch Opens (or CST)
C6 22156 -1523 2.6 Close Indicator Light on (Green)
C8 22156 -1523. 2.6 Open Indicator Light Off (Red)
C15 22168 -3186 2.5 Motor Current Cutoff C16 22284 -18693 0.0 Mexi11L111 Thrust Value C17 22324 -18970 o.o Final Thrust Value
~*UNH i vv~i!aJ~.J 1C
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01 SIRVEY,SET-IP AND RECI.MATIDN ... 2 2.0 4.0
- 02 03 REVIEY WIRC PAEICACE, <PKO RBIUIREMENTS AND <RIP>
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Test-Results Sllllll8ry
/': SURRY Unit: Tl<<>
fVJ E. -04£1 ~ /2.ei/. o / .4-dJ_oI/
. . .,.,, ,) . 5;,/::,. Valve Tag~Num:>er: SI-2869A
,4~c_~~~+ (
Test Nlllber: 28 Test Conditions Test Date: 2ll/95 R..(? r_ 9 Full Open Full Closed Flow (GPM) 0 0 Upstream Pressure (PSI) 0 0 Downstream Pressure (PSI) 0 0 Motor Voltage 440.00 Volts AC Switch Settings Open Torque Switch Setting 5.000 Close Torque switch Setting 5.000 Durations (seconds)
Closing Stroke Time 10.303 Close Torque Bypass Switch Opens seconds 2.888 X stroke 28.03 To Open lrdicator Light Off seconds 10.304 X stroke 100.01 Seating Time 0.256 Contactor Dropout Time 0.013 Opening Stroke Tiine 9.362 Open Torque Bypass switch Opens seconds 2.259 X stroke 24.13 To Close lrdicator Light Off seconds 9.362 X stroke 100.00 tontactor Dropout Time 0.016
~--Forces ___ Clbs)-----------Calibration-Range:-641 -to--15176-lbs.---------
Closing Max Running Force -564 Avg R~ing Force -104
_Thrust at Start of Wedging -564 Spring Pack Preload -5272 Thrust at CST -871 Thrust at Contactor Dropout -1287 Inertial Thrust -7497 Maxinun Thrust -8784 Available Thrust Margin -307 Opening Initial Thrust (At Motor Start) -5584 Disc Pullout Force 6725 Max Running Force 822 Avg Running Force 364 Motor Currents Canps rms)
Closing Inrush Current 16.0 Average R~ing Current 2.5 current at Contactor Dropout 2.5 Opening Inrush Current 16.0 Current at Maxi111111 Pullout Force 2.5 Average ~ing Current 2.5 General CCl'llllents:
WO# 00285789-01 VALVE CHANGfD TO LIMIT CLOSE USING WO# 00299578-01 RESET CLOSE LIMIT AS PER DRP-0DTNOT£ 2 CST= 847.1# TOTAL= 8642# FINAL= 8557#
Tr:F,~b io y . ~L~y/bc.:. ~ tt~c:l,c~~
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Tag: S1-2ai9A
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4~~1 R.e+~ i
' ,,--4 ~7 force =-52.69-soo Clhs)
C~t - 8Y'7. I ~ .~,;
':IP-5001 toT/tl- -
86 'f:l.. ,,_ (2.. ' Oy~ ,".
0{1.,*..
SPARE awttEL*o.ooo r,foltrl- - S..!>--St ._ e
- 0.01
-6.113 *0.02 Cin)
- 0.03
- 0.0\
- o.oso......-.-.......+-.-................. . . - . . . - - - - - - - - - - -
5001 //~.;<.I,-7*-.tJ '°&7 Tille in Seconds 1.217 /(,,-/-.uo,r~ - , d l - 7 'Z. - ~- ?-S-Calihfation Ra~:- 641 to -15176 lhs. /
- Torque Switch Setting Open/Close *************** : 5.000/5.000 Limit Switch Rotor Adjustment CY/N) ************ : Y Flow (gpm) Start/Finish ************************ : 0/ 0
- Upstream Pressure (psi) Start/Finish *********** : 0/ 0 Downstream Pressure (psi) Start/Finish ********* : 0/ 0 General Conments:
WO# 00285789*01 VALVE CHANGED TO LIMIT CLOSE USING WO# 00299578-01 RESET CLOSE LIMIT AS PER DRP-007 NOTE 2 CST= 847.1# TOTAL= S642# FINAL= 8557#
TESTED BY SLAYTON & BRIDGES Valve Infonnation Valve Actuator Actuator Motor
,ant: SURRY Actuator Type ** : 9BN/6BX Voltage Type: AC Unit.: Tti<<l Size *********** : SMB/00 Volts ******* : 440 Tag Nl.lli>er ****** : Sl-2869A Max Thrust Rate: 12500 lbs
- rating ** : Z.70 811'>5 Tyoe ************ : GATE Serial# ******* : 114534 Norn. Speed ** : 1750.00 rpn Size ************ : 3JNCH Order # ........ : 3458041 Start torque: 15 .OD ft- lb Target Thrust *** : 8517 lbs Worm Gear Teeth: 25 RISI Torque ** : O.DD ft-lb Orientation ***** : HORJZ Gear Ratio ***** : 72 Horse Power.: 1.00 h.p.
.. ocation ******.*..* : AUX-BAS Spring Pack# 022 Stem Material *** : 17*4PH srem Diameter *** : 1.125 inches
'~reads per Inch: 3.00 nreads per Rev.: 2
/Poisson Ratio.: 106.0 x 1DE6 psi
\'OlES Serial# ** : A5452 Signal Conditioner Calibration Due Dllte 07/04/95 SFS~ Sensitivity -1.280E-0002 µv/v/lb Spare Channel Offset: -0.13 in
/------
tv,.£:
,. Time Force (lbs) current Description
-04q~ !i-HC{c.l,~\
(msecs) -(Uncorrected) ~-c-.,s rms) fe-V, 0
- 02 09 012 013 124 131 157 1991 2383 2769
-5584
-5732
-5000 6725 6282 306 3.2 16.0 7.9 2.5 2.5 2.6 "Motor Stert
. Inrush Current Peak Lost Motion Region (Neer Middle)
Maxinun Force at Disc Pullout Open Torque Bypass Switch Opens Opening RUT1ing Condition (Neer Begin*g) 4Jd o4-Re-t CJ 014 9459 295 2.5 Opening RLITling Condition (Near End) 016 9486 271 2.6 Open Limit Switch-Opens 015 9486 271 2.6 Close Indicator Light Off (Green) 017 9502 351 1.8 Motor Current Cutoff co 14826 1037 4.1 Motor Start co- 14826 1037 4.1 C1 14835 1394 16.0 Inrush current Peak C2 14860 329 6.6 Lost Motion Region (Near Middle)
CF 15799 -o 2.4 Zeroing Point for CF Calibration C4 15866 30 2.5 Closing RLITling Condition (Near* Begin'g)
C7 17714 -15 2.4 Close Torque Bypass Switch Opens cs 25075 -458 2.4 Closing RLITling Condition (Near End)
C11 25107 -564 2.3 Disc Motion Stops/ Start of Wedging C14 25129 -871 2.5 Close Torque Switch Opens (or CST) cs 25130 -908 2.5 Open Indicator Light Off (Red)
C15 25142 -1287 2.5 Motor Current Cutoff C13 25225 -5272 o.o Spring Pack Starts to COl1'Jress C16 25363 -8784 .0.0 Maxinun Thrust Value C17 25565 -8689 o.o Final Thrust Value 25565 -8689 o.o
.1
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- 11N DESC: tf6I TO tlJT LEGS l1TC NUMBER: * .-, ,
- BC1H ITEN NO:
- MFR: L.553 HODEL NO. : 6"9-00, 152299-01 SERIAL NO ,
- ITEH QCL: * ~*.
- TASI< TITLE: ELECTRICAL DISCONNECT AND RECONNECT TYPE: CORRECTIVE HAINTBIANCE 6R TASK: Y __
- LDC GRID X/Y: 10.7 J El.EV: 2 YINS FR:* *
- UJCATION CODE: AB - AUXILIARY BUILDING ***
- LOCATION DESC: 20 FT NmTH OF sotrrH WALL 20 FT WEST OF EAST WALL 3 FT OFF ~
- TASK PRDBt.Etl FLOOR ELECTRICAL DISCONNECT AND RECONNECT TO SUPf'O'Rl HECH.TASI< 1
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- DESCRIPTION: ...1-- *
- RETAIN FAIL£D EtrUIPt'ENT FOR CAUSE DETERtlINATION EVALIJATlON **
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- ENVIRCN£NTAL :zoN!.:.. AB-2B *
- N APPEND R N APPEND R ~ : 17 *
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- y NPRDS ITEM y INSUL COMP : <<
-==---====--------m=-===-=cc..--=-==s"""'___........==-......,.,.,=........=---=*. **"""'"'*.............................,...,-..................*
SEISMIC TA 6 K .INFORMATION *
N DEV RPT ~*s '
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- RWP REm> y CONF ENTRY N IND SR i\! ENG REVIEW ti * *
- RWP NUtlBERS SEctm: REL i,;
N COATING REIW N ENG DES DOC :
- * * * =, . -.
- .**TROLJBLE/Bf.'.r.AKDCJWN: N W/R APPROVED BY :
- DATE: WINDCI¥': FEG:
S I G N A T U P. E S
- ~~~ TASK
- OPERATIONS ~~ DATE/TIME:
LCO
- "' IKJTlFm _ __c.Ra~-=s}p __ DATE/TIME
- -----'---- .*
==*T=AGG==l=Nu=VER=I=F=l=ED=--B=Y=:=-4-==l=';!f_,.r::4=-=-=-:=..~ ~ __ *
- TAGGING REPORT NBRS: d'j(.p- 5!-ooc./3 *.
-======================= .....=======i:::==============-****===-========--========t!*
- SPECIAL NOTES WORI{ SAFE! ! WI-IT
- NOTE** DENATUfE> ALCOHOL TO BE CARRIED INTO THE
- (RCA> ON SATURATED RAGS,IN PLASTIC BAGS ONLY.
- IMIIKIIIIIINIIIIIIIIIIIOIIIUIINN NOTE tHHINlllllllllUIIIII--
- ti
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- BY TI£ tlECI-IANJC:S BEFORE THIS OPERATOR IS ENERGIZED. ii
- INNIINIIMNNNIIIINM*IINIINNNNIIMNMNMMN*MIINMIINIIIINIINNNMMNIINIINMN
- T A 6 IC JOB STEPS *
- STEP NO STEP DESCRIPTION mAFT REWIRED Hr:;IJRf; TOT HOURS *
- 01 SURVEY/SETUP/RECI.AHATION. Hf' 2 2.(l 4.0 *
- 02 03 REVIEW WORK PACKAGE, <PKT> RE'1UIRMENTS AND <RWP>
VERIFY PROPER KMK t ELEC El.EC 2
1 0 .,
- ~
0 ... 1 0.4 0.1 *
- 04 SET lP WORI< AREA ELEC 2 ~.(> 2.0 *
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Test Results Surmary Unit: TWO rn £ -dlqd'; £.e., - ~ Aricl. o/1 Valve Tag Nl.lllber: Sl-2869B IHf-o..J, ,. , . .._;/-/
Test Nuri>er:
- 10 Test Date: 5/17/96 Test conditions Full Open Full Closed Flow (GPM) 0 0 Upstream Pressure (PSI) 0 0 Downstream Pressure (PSI) 0 0 Motor Voltage 460.00 Volts AC Switch Settings Open Torque Switch Setting 5.000 Close Torque Switch Setting 5.000 Durations (seconds)
Closing Stroke Time 9.639 Close Torque Bypass Switch Opens seconds 2.806 X stroke 29.11 To Open Indicator Light Off seconds 9.639 X stroke 100.00 Seating Time 0.145 Contactor Dropout Time 0.014 Opening Stroke Time 9.575 Open Torque Bypass Switch Opens seconds 3.044 X stroke 31.79 To Close Indicator Light Off seconds 9.575 X stroke 100.00 Contactor Dropout Time 0.012 Forces (lbs) Calibration Range: 1273 to *8198 lbs.
Closing
- Running Force -2113 Avg Running Force -1931 Thrust at Start of Wedging -2060 Spring Pack Preload -2311 Thrust at CST *3004 Thrust at Contactor Dropout -3612 Inertial_ Thrust -3371 Maxinun Thrust -6983 Available Thrust Margin -944 Opening Initial Thrust (At Motor Start) -6962 Disc Pullout Force 3744 Max Running Force 1223 Avg Running Force 1043 Motor -Currents ( ~ rms)
Closing Inrush current 18.2 Average Running Current 3.0 Current at Contactor Dropout 2.1 Opening Inrush Current 16.6 current at Maxinun Pullout Force 3.3 Average Running Current 3.0 General Comnents:
0.#341652*02,HRUST VERICIATION PERFORMED WITH CST ONLY, C*CLAMP USED 069 SEN ** 5432 AUX.SEN ** 00695 TCF.SEN ** 00575 THRUST BANDS AS PRE *.
- TRANSMITTAL MIN. HSC BUT LEAST THAN 2XRL MAX. 12478 BYPASS 2SX*35X BOTH DIR. SYSTEM #1 USED TESTED BY SLAYTON,JODRY,FULLER
/l1 ~ -ol/Cr ~ q ,4Jd 0/1 Force (lbs) current Description (Uncorrected) Caq,s nns) /Lev.
-6962 4.6 Motor Start 82 -6962 16.6 Inrush Current Peak Ak C /, ""- -( / t _j_ I 03 04 05 361 622 725 841
-6862
-6674
-695 962 2.9 3.0
- 3. 1 3.1 Lost Motion Region (Near Middle)
Hanmerblow/Start of Stem Decompression Stem C°""ression Fully Relieved fl-~+ 9 09 913 3744 3.3 Maxi111111 Force at Disc Pullout 013 1481 1049 3.0 Opening Running Condition (Near Begin's>
012 3117 1020 3.1 open Torque Bypass Switch Opens 014 8793 1078 3. 1 Opening Running Condition (Near End) 016 9648 1136 2.9 Open Limit Switch Opens 015 9648 1136 2.9 .Close Indicator Light Off (Green>
017 9660 1049 2.1 Motor Current Cutoff co 11965 1049 11.7 Motor Start C1 11970 1049 18.2 Inrush Current Peak C3 12510 0 2.9 Tension to C~ression Transition CF 12510 0 2.9 Zeroing Point for CF Calibration C4 13618 -1m 3.0 Closing Running condition (Near Begin's>
C7 14771 -1892 3.0 Close Torque Bypass Switch Opens cs 20983 -1863 3.2 Closing Running Condition (Near End>
C11 21572 -2060 2.9 Disc Motion Stops./ Start of ~edging C13 21582 -2311 3.1 Spring Pack Starts to Compress cs 21604 -3004 3.0 Open Indicator Light Off (Red)
C14 21604 . -3004 3.0 Close Torque Switch Opens (or CST)
C15 21618 -3612 2.1 Motor Current Cutoff C16 21717 -6983 o.o Maxi111111 Thrust Value C17 21758 -6952 a.a Final Thrust Value
Attachment 8.1 NDCM 3.7 Rev. 5 VIRGINIA POWER CALCULATION COVER/INPUT SHEET Type Sub Station Unit Status System Total pages:
[CALC] [ MEC] [99] [00] [ AC ] [ ] 16 Doc. No. Rev. QA Class Aprvd Date Attachments:
[ ME-0498 ] [ 0 ] L ..filLJ [ ] _1_ thru _3_
CALC. Title/
Subject:
Pressure Locking and Stem Effect Thermal Binding (Plus any Key Analysis for Generic Letter 95-07 Words for Re-trieval purposes)
REFERENCE NUMBERS:
Initiating Document (DCP,EWR, etc.):
IR NO.: -- JOB No:
ORIGINATOR: VP [XJ Discipline Mechanical Engineering A/E [_] Firm Name Vendor Code:
A/E Cale. No.:
Mark Number
References:
(Sample on first line) /
/
Station
[ ]
Unit
[_] [ __
System
__ ] [
Prefix/ID
] [ ] [
'component/ID
] [ ]
[
[
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]
[_]
[_]
[
[ __
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]
[
[
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[
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- Use Associated Information Sheet to continue.
OBJECTIVE:
The objective of this calculation is to determine the expected pullout thrust loads on the NAPS and SPS valves that are susceptible to pressure locking and thermal binding. The valves evaluated here were identified as being the most susceptible to these phenomena in reference 2.
SUMMARY
OF RESULTS/CONCLUSIONS:
The results of this pressure locking and thermal binding analysis show that the minimum margin for pressure locking is 52% and the minimum margin for thermal binding is 66% .
- 1Yfl~D Is Associated Information Form Attach.ed?
P. D. } ~
BY:
DATE:
2,.-~ 6 J. t.
~1~I~wg~
WOLAK (X )YES DATE:
z.-21-<1~
(
INDE~IEW
- pff.
)NO B. F. Demars DATE:
Z-21*?~
Attachment 8.7 NDCM 3.7 Rev. 5 I ASSOCIATED INFORMATION I
CALCULATION NUMBER: REV. NO. SHEET ME-0498 0 2 OF 16 In addition to the Engineering Data System (EDS)/Mark Numbers identified on the Calculation Cover Sheet, the following Systems, Components, Structures, and/or Programs are associated with this calculation:
(SEE STD-GN-0008 FOR CODES)
Affected Structures: CODE DESCRIPTION
[ ] [ ]
Use additional [ ] [ ]
Sheets as needed [ ] [ ]
( ) see attached [ ] [ ]
Affected Structures: CODE DESCRIPTION
[ ] [ ]
Use additional [ ] [ ]
Sheets as needed [ ] [ ]
( ) see attached [ ] [ ]
Additional Mark Nos.:
Station Unit system Prefix/ID Component/ID
[-2.L] [__Ql_] [....RQ_] [ MOV] [ 1535 ] [VALVE] [ ]
[-2.L] [__Ql_] [....RQ_] [ MOV] [ 1535 ] [VALVOP] [ ]
[-2.L] [__Ql_] [....RQ_] [ MOV] [ 1536 ] [VALVE] [ ]
[-2.L] [__Ql_] [....RQ_] [ MOV] [ 1536 ] [VALVOP] [ ]
[-2.L] [__QL] L ...R~] [ MOV] [ 2535 ] [VALVE] [ ]
[-2.L] [__QL] [....RQ_] [ MOV] [ 2535 ] [VALVOP] [ ]
[-2.L] [__QL] [....RQ_] [ MOV] [ 2536 ] [VALVE] [ ]
OTHER ITEMS: (Non-EDS Equipment ID' s)
{Pipe Seg.
- line number, equip., etc.
[_] Additional (enter on next page)
PROGRAMS:
[_] ALARA [_] IN-SERVICE INSP/NDE (ISI/NDE)
[_] APPENDIX R (APP R) [_] PERFORMANCE TESTING (PT)
[_] EQUIPMENT QUALIFICATION (EQ) [_] PROBALISTIC RISK ASSESSMENT
[_] HEALTH PHYSICS (HP) [_] REG. GUIDE 1.97 {RG 1. 97)
[_] HEAVY LOADS {HVY LD) [_] SURVEILLANCE {SURVL)
[ _] HIGH ENERGY LINE BREAK {HELB) [_] WELDING {WELD)
[_] HUMAN FACTORS (HF) [X] OTHER {Specify)
[_] IE 79-14 GL 89-10 and GL 95-07 Comments:
~
ASSOCIATED INFORMATION
.II CALCULATION NUMBER:
ME-0498
.. Additional Mark Nos:
Station
[--1L] [~]
Unit System
[__RQ__] [
II REV.NO.
Prefix/ID MOV] [
0 2536
'1
]
SHEET 3
Component/ID
[VALVOP] [
OF ll_
]
- i1
[.2L] L...Q.LJ [__RQ__] [ MOV] [ 1535 ] [VALVE] [ ]
[.2L] [_QL] [__RQ__] [ MOV] [ 1535 ] [VALVOP] [ ]
[.2L] [_QL] [__RQ__] [ MOV] [ 1536 ] [VALVE] [ ]
[.2L] [_QL] [__RQ__] [ MOV] [ 1536 ] [VALVOP] [ ]
[.2L] [_QL] [__RQ__] [ MOV] [ 2535 ] [VALVE] [ ]
[.2L] [_QL] [__RQ__] [ MOV] [ 2535 ] [VALVOP] [ ]
[.2L] [_QL] [~] [ MOV] [ 2536 ] [VALVE] [ ]
[ __
[.2L]
__ ] [ __
[_QL]
__ ] [ __
[__RQ__]
__ ]
[
[
MOV] [
] [
2536 ]
]
[VALVOP] [
[ ] [
]
]
[
[ __
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[
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[
[ __
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] [
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[ \1111 n
Doc. No.: ME-0498, Rev. O Sheet 4 of 16
- OBJECTIVE TABLE OF CONTENTS 5
METHOD OF ANALYSIS 6 ASSUMPTIONS *
- 9 DESIGN INPUTS. 10 COMPUTER CODES 11 REFERENCES . . . . . . . . . 12 CALCULATIONS . . . . . . . . . . . . . . . . . 13 CONCLUSION e e e e G e e e e e e e e e e 16 ATTACHMENT 1 - STEM GROWTH (Stem effect thermal binding)
ANALYSIS ATTACHMENT 2 - PRESSURE LOCKING ANALYSIS USING WOG METHODS
- ATTACHMENT 3 - CALCULATION REVIEW CHECKLIST AND ATTACHED REFERENCES
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498 Date:
Date:
Date:
2.-Lo-9 6 Z.- U-z.~z.t-'?~
'1'-
02/20/98 1 :24pm
Doc. No.: ME-0498, Rev. O Sheet 5 of 16 OBJECTIVE The purpose of this calculation is to determine the effect on valve pullout forces due to pressure locking and stem effect thermal binding. Only the MOVs identified in the reference 2 Type 1 report as being susceptible to pressure locking or stem effect thermal binding are evaluated. The Type 1 report is in response to the Nuclear Regulatory Commission Generic Letter 95-07 (Reference 1) on pressure locking and stem effect thermal binding.
The reference 2 report identifies the North Anna {NAPS) block valves, X-RC-MOV-X535,-1536 and the block valves at Surry SPS as being susceptible to stem effect thermal binding and the block
- valves at NAPS as being susceptible to pressure locking
- Pressure locking is not a concern at SPS because the piping to the block valves is drained. Consequently, there is no way to pressure lock the valves {reference 2).
NAPS 2-RC-MOV-2536 is not susceptible to stem effect thermal binding since this MOV has a SB style operator. This operator has a compensating springpack which cushions the inertial thrust delivered to the valve and as a side benefit, it allows stem thermal stresses to be relieved by spring deflection.
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evalu1tion/ME-0498
~~'7~
Date:
Date:
Date:
2- er "'
2..-2/ w z-2.1 _ qb 9<,
02/20/98 1 :24pm
Doc. No.: ME-0498, Rev. o Sheet 6 of 16 METHOD OF ANALYSIS This analysis calculates the expected maximum pullout thrust on valves identified in Reference 2. The pressure locking thrusts are determined with a method developed by Virginia Power and also by a method developed by the Westinghouse Owner's Group {WOG) and Commonweal th Edison {Reference 3)
- The stem effect thermal binding evaluation is performed using the WOG methodology.
Virginia Power Pressure Locking Methodology Since pressure locking occurs when the valve bonnet- is pressurized more than the flow side of the discs, the resultant force on the
- valve disk can be calculated based upon this force imbalance. The pullout thrust in a pressure locking situation has five components:
- 1) the pullout force from static seating which resists valve opening; 2) the bonnet pressure acting on the disk to keep the valve closed; 3) the upstream system pressure acting on the upstream disk which counters the closing force of the bonnet pressure; 4) the downstream system pressure acting on the downstream disk which counters the closing force of the bonnet pressure; and 5) the bonnet pressure acting on the stem which tends to eject the stem from the valve and counters the closing force.
The static pullout force is provided by the stations.
- Prepared By:
Reviewed By:
Reviewed By:
- ~~
~~~~
Date:
Date:
Date:
""2. -LO -9' -4.
z- 2./ - <J~
2~ 2./ ~ 'i<-
MOV Evnlu8tion/ME-0498 02/20/98 1 :24pm
Doc. No.: ME-0498, Rev. o Sheet 7 of 16 The pressure forces are calculated based upon the disk surface area that the pressure acts upon. The flowstream pressure is distributed over an area the size of the seat inner diameter or the valve port area. The bonnet pressure acts on a surface area equal to the outer diameter of the seat sealing area. The resulting pressure force equation is:
where: Fprcs=pressure force, lbs Pboon&=pressure trapped in bonnet, psi P~=upstream pressure, psi P~=downstream pressure, psi Seat00=seat outer diameter, in.
Seatm=Seat inner diameter, in.
- VF=Valve factor, 0.3 for wedge valves Often, the seat ID and OD are virtually the same.
this analysis, the OD and ID are taken to be the same.
Consequently, in This may be slightly non-conservative. However, this is more than offset by assuming that bonnet pressure acts across the whole wedge surface area. The wedge hub on these flex wedge valves does not allow bonnet pressure to act over a significant percentage of the wedge (see assumption 3).
The last component in the pressure locking pullout thrust calculation is the stem rejection force. The bonnet pressure tries to eject the stem from the valve. This force reduces the amount of
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evalu.otion/ME-0498 iftw-
~~.......,.._
Date:
Date:
Date:
L -2 o "-?-6.
Z- z1- 96 Z* z.t-'l'e,.
02/20/98 1 :24pm
Doc. No.: ME-0498, Rev. O Sheet 8 of 16 thrust required to open the valve
- The stem rejection force equation is:
Fstem re.i = Pboonct* ( 7r / 4
- Steino0 2 )
where: Fstcm~=stem rejection load, lbs steino0 =stem outer dimension, in.
WOG Methodology The WOG pressure locking and thermal binding (stem growth) methodologies are fully discussed in reference 9 and will not be repeated *
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0488
~ ~-
Date:
Date:
Date:
?.,-2-0 -?6 2-z..1-<ft_
z.. ~ Z./ - '7"'
02/20/88 1:24pm
Doc. No.: ME-0498, Rev. o Sheet 9 of 16 ASSUMPTIONS
- 1. All dimensions are nominal. No effort has been made to quantify manufacturing tolerances.
- 2. As mentioned in the methods section, the seat OD and ID are taken to be equivalent. This is due to the fact that typical wedge to seat contact is uneven and only a thin line. This makes expected seat dimensions difficult to quantify.
- 3. A flex wedge is a one piece design. In a pressure locking situation, system pressure uniformly acts across the disk outside face. Bonnet pressure acts across the entire interior wedge face except at the hub which joins the two wedge halves.
The cross sectional area of the hub reduces bonnet pressure effects approximately 9-10%
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0488
~dL Date:
Date:
Date:
2-2..0-r 6 z- 2/ - '1(,
z.. z.,--1~
02/20/98 1 :24pm
Doc. No.: ME-0498, Rev. O Sheet 10 of 16 DESIGN INPUTS
- 1. The valve wedge dimensional data was supplied by Westinghouse
{reference 8) and Velan {reference 7) for their valves.
- 2. The bonnet, upstream and downstream pressures are provided in reference 3.
- 3. The valve port diameters and stem and wedge configurations are taken from the applicable valve drawing or the mentioned references.
- 4. The pullout forces, where available, are taken from the attached reference 5. Pullout thrusts for SPS 1-RC-MOV-1535,
-1536 are unavailable. It is assumed that the pullout thrust for these two valves is equal to the greatest pullout thrust
- to maximum thrust ratio for all the valves of interest.
2-RC-MOV-2536 has a pullout thrust of 4556 lbs and a maximum thrust of 7297 lbs. This pullout ratio is 62.4%. The pullout NAPS thrusts for the two SPS valves then becomes 6992 for 1-RC-MOV-1535 (total thrust is 11,205 lbs) and 7291 lbs for 1-RC-MOV-1536 (total thrust is 11,685 lbs).
- 5. Motor torques, stem factors, operator data and coefficient of friction are taken from reference 13 *
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0499 Date:
Date:
Date:
2 0 -::!l.. 0.
Z-ZI - 91, LP 2{ - ~G 02/20/96 1:24pm
Doc. No.: ME-0498, Rev. o Sheet 11 of 16 COMPUTER CODES Two pieces of software are used in this calculation. QuattroPro version 5 {reference 11) is used to assist in the mathematical calculations presented in the Methods of Analysis section. This simple calculation is independently checked by the reviewer and consequently a sample calculation is not required.
The WOG analysis for pressure locking and stem effect thermal binding are performed with MathCad version 5 {reference 10). The analysis is presented in the attached reference 9. Reference 12 provides verification of the accuracy of the stem growth analysis
{stem effect thermal binding) and will not be repeated here. The pressure locking analysis is presented in this calculation to compare with the VP methodology. No safety related or design basis input is developed with the WOG pressure locking analysis and therefore no independent verification is required.
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498 ff)~~
tr-~
Date:
Date:
Date:
"2.._-"2..0-9.
z - Z.l. -?Ct, Z .. Z..I.. 't'G, 02/20/98 1 :24pm
Doc. No.: ME-0498, Rev. o Sheet 12 of 16 REFERENCES
- 1. NRC Generic Letter, 95-07, "Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves,"
8/17/95.
- 2. Type 1 Report, NP-3068, "Pressure Locking and Thermal Binding of Safety-Related Power Operated Gate Valves, NRC Generic Letter 95-07" B.F. DeMars, 1/31/96.
- 3. Memo, B.F. DeMars to P.O. Jones, "Design Inputs for Calculation ME-0498, Rev. o, 2/8/96.
- 4. Velan Valve drawing 88405-2, 11 3-inch, 1500#, Bolted Bonnet Gate Valve."
- 6. Westinghouse Valve Drawing, 8373D77, (NAPS 2-RC-MOV-2536).
- 7. DC-147, Rev.a, Add. 3, Velan Weak Link Analysis, 12/94.
- 8. Fax from Westinghouse to B.F. DeMars, "8373D77 Valve Wedge Data," 1/31/96, attached.
- 9. STEMGROW and PRESSURE LOCKING User's Manuals, (attached).
- 10. MathCad Version 5.
- 11. QuattroPro for Windows, Version 5.
- 12. ME-0499, "Verification of Computer Calculation "STEMGROW" Westinghouse owner' s Group Computer Program, " B. F. DeMars, 2/96.
- 13. ME-0492, "Thrust Band Calculation for North Anna Safety-Related Motor Operated Valves", R.E. Brightup,1/96.
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0499 Date:
Date:
Date:
2-2.0 Z.* L( -
-'l,1...
z - -z.J - '1?
'l(o 02/20/98 1 :24pm
Doc. No.: ME-0498, Rev. o Sheet 13 of 16 CALCULATIONS All the calculations for the pressure locking evaluation are provided in Table 3. The results show that all four MOVs have at least 52% margin between the expected maximum pressure locking pullout force and the operator capability at the time of expected valve operation (which includes a degraded voltage condition).
The WOG pressure locking analysis is provided in Attachment 2.
The VP method provides more conservative pressure locking pullout thrusts than the WOG method. This appears to be a result of the more exacting evaluation developed by Commonweal th Edison/WOG which was benchmarked against test data. A comparison between the two methods is shown in table 1 below for the NAPS valves.
Table 1 - Pressure Locking Results and Comparison Between VP and WOG Methods Mark VP Pressure WOG Pressure Number Locking Results Locking Results RC-1535 5392 3896 RC-1536 5102 3606 RC-2535 5873 4377 RC-2536 7337 5014
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0499 rPa ~~-
Date:
Date:
Date:
Z,-2-o-?c.
Z - 2/ -C/{p
'l - l.l ~ 't(;,
02/20/98 1 :24pm
Doc. No.: ME-0498, Rev. O Sheet 14 of 16 The stem effect thermal binding evaluations are summarized in Table 2 (the actual calculation is in Attachment 1). The results show that stem effect thermal binding increases the pullout thrust for the analyzed valves. However, the increase is small and does not encroach upon any MOV limits.
Table 2 Stem effect thermal binding Results Based Upon WOG Methods Mark Pullout Operator Capability Number/Station thrust Capability Margin (%)
w/thermal (lbs) binding (lbs)
- 1-RC-MOV-1535/NAPS 1-RC-MOV-1536/NAPS 4286 3814 12786 14183 66.48 73.11 2-RC-MOV-2535/NAPS 4665 14310 67.40 1-RC-MOV-1535/SPS 7491 27370 72.63 1-RC-MOV-1536/SPS 8016 27893 71.26 2-RC-MOV-2535/SPS 6730 27109 75.17 2-RC-MOV-2536/SPS 5811 27293 78.71
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evaluation/ME-0498 Date:
Date:
Date:
z._-20 -f't::,.
2-- Z) --f/(,
Z*Z.r*'?(p 02/20/98 1 :24pm
Pressure Locking Table for North Anna Power Station MOVs Upstream Downst. Stem Pullout Bonnet System System Disc Port Disc Valve Pressure Stem Rejection Pullout Force Motor App Mark No. Pressure Pressure Pressure OD OD Force Factor Force Diameter Load Force (pres force Torque Factor
-rej ld+po)
RC-1535 2235 1500 3 2.25 2.25 11791 0.3 3537.3 1.125 2220.5 4075 5392 11.4 0.9 RC-1536 2235 1500 3 2.25 2.25 11791 0.3 3537.3 1.125 2220.5 3785 5102 11.2 0.9 RC-2535 2235 1500 3 2.25 2.25 11791 0.3 3537.3 1.125 2220.5 4556 5873 11.3 0.9 RC-2536 2235 1500 3 2.62 2.62 15988 0.55 8793.3 1.25 2741.4 1285 7337 10.2 0.9 Operator Capability Capability Pullout Operator MOV/plan Stem Thrust -Pullout Margin OGR Efficiency Capability Avg COF Factor Capability (margin) (%)
55.8 0.4 229 0.2 0.0179 12786 7394 57.8 63 0.4 254 0.2 0.0179 14183 9081 64.0 63 . 0.4 256 0.2 0.0179 14310 8437 59.0 52.2 0.45 216 0.2 0.0140 15370 8033 52.3
Doc. No.: ME-0498, Rev. o Sheet 16 of 16 CONCLUSION The results of this evaluation show that all the valves identified in reference 2 as susceptible to pressure locking and/or stem effect thermal binding should perform as required even if the expected worst case condition exists. The pressure locking margins range from approximately 52% to 64%. The margins from the stem effect thermal binding calculation range from approximately 66% to 79% *
- Prepared By:
Reviewed By:
Reviewed By:
MOV Evatualion/ME-0488 Date:
Date:
Date:
2-2.c Z. - 2 / -
- -r-6
?'6
- 2. - Z,/.. c?G:,
02/20/88 1 :24pm
Doc. No.: ME-0498, Rev. o
- ATTACHMENT 1 - STEM GROWTH (THERMAL BZNDZNG) ANALYSIS
--~program STEMGROWfor NAPS
- 1-RC-MOV-1535 Typical Thrust Trace Control Switch Trip
..,/
t Maximum Thrust Inputs:
Stem Travel (in) Travel =2.25 *in Change in Temperature (F) DeltaTemp =300*F m
Mod. of Therm. Exp. (in/in F) TempCoef = 0.000006 *- -
in*F Max. Static_ Closing Force (lbf) Max close = 9304 *lbf Max. Static Unseating Force (lbf) Max open =4075 *lbf Control Switch Trip Thrust (lbf) CST thrust =3573 *lbf Control Switch Trip Time (sec) CST time = 8.644 *sec Thrust at Seating (lbf) Seat thrust = 498 *lbf Time of Seating (sec) Seat time= 8.564 *sec 1
Motor Speed (rpm) MotorSpeed = 1700 * - .
mm Actuator Overall Ratio OAR=55.8 Stem Lead (in) Lead = 0.667 *in
- STEMGROW, Rev. 0, 12/29/9S Westinghouse Owner's Group 1/31/Ptf 1:01 PM Page 2 ef.1
- Calculations:
Stem - - A
~¥-
- =
min Lead MotorSpeed*- - * - -
60*sec OAR in Stem speed =0.339
- sec
. CST thrust - Seat thrust Static rat =38437
- lbf Static rate :=
- e sec CST time - Seat time
. Static rate Stiflhess = 113492 *Ibf Stifthess := - - - - in Stem speed Max Unseatin
. gRatio. := ----=~open UnseatingRatio = 0.438 Max close StemElongation := Travel*DeltaTemp*TempCoef StemElongation =0.0043 *in
- Final thrust := Max *close + StemElongation* Stiffhess Final unseating := UnseatingRatio* Final thrust Final thrust =9787 *lbf Final unseating =4286 *lbf
- STEMGROW,Rev. 0, 12129/95 Westinghouse Owner's Group 1131/96 1:01 PM Page 3 o/3
~Program STEMGROW for NAPS
- 1-RC-MOV-1536 Typical Thrust Trace Control Switch Trip
./
t Maximum Thrust Inputs:
Stem Travel (in) Travel = 2.25 *in /
- Change in Temperature (F) DeltaTemp =300 *F /
m Mod. of Therm. Exp. (in/in F) TempCoef = 0.000006 *- -
in*F Max. Static Closing Force (lbf) Max close =7355 *lbf Max. Static Unseating Force (lbf) Max open =3785 *lbf Control Switch Trip Thrust (lbf) CST thrust =2033 *lbf Control Switch Trip Time (sec) CST time = 8. 722 *sec Thrust at Seating (lbf) Seat thrust = 1109 *lbf Time of Seating (sec) Seat time = 8.488 *sec 1
Motor Speed (rpm) MotorSpeed = 1700 * - .
mm Actuator Overall Ratio OAR=63 Stem Lead (in) Lead = 0.667 *in
- STEMGROW, Rev. 0, 12/29/95 Westinghouse Owner's Group 1/30/96 11:24AM Page2o/3
--~Program STEMGROW
- Calculations:
Stem sp min Lead eed := MotorSpeed*- - - * - -
60* sec OAR Stem sp eed=0.3*-
m sec
.,I
...(~':"\*
. CS'F"th~;,:::: Seat thrust Static r a t e : = - - - - - - - - Static t = 3949
- lbf ~~'
ra e sec CST time - Seat time Static rate Stiflhess : = - ~ ~ - Stiflness = 13164 *lbf Stem speed in Max open UnseatingRatio := - - - - UnseatingRatio = 0.5146 Max close StemElongation := Travel*DeltaTemp*TempCoef StemElongation =0.0043 *in
- Final thrust := Max close + StemElongation* Stiflhess Final unseating :=_ UnseatingRatio* Final thrust Final thrust =7411 *lbf Final unseating = 3 814 *lbf
- STEMGROW, Rev. 0, 12/29/95 Westinghouse Owner's Group 1/30/96 11:24AM Page 3 o/3
Program-STEMGROW for NAPS
- 2-RC-MOV-2535 Typical Thrust Trace Control Switch Trip
..,-/
Inputs:
Stem Travel (in) Travel =2.25 *in Change in Temperature (F) DeltaTemp =300 *F in Mod. of Therm. Exp. (in/in F) TempCoef = 0.000006 *- -
in*F Max. Static Closing Force (lbf) Max close = 7297 *lbf Max. Static Unseating Force (lbf) Max open =4556 *lbf Control Switch Trip Thrust (lbf) CST thrust = 2529 *lbf Control Switch Trip Time (sec) CST time = 10.383 *sec Thrust at Seating (lbf) Seat thrust= 1412 *lbf Time of Seating (sec) Seat time = 10.292 *sec
. 1-Motor Speed (rpm) MotorSpeed = 1700 * - .
mm Actuator Overall Ratio OAR=63 Stem Lead (in) Lead = 0. 667 *in
- STEMGROW. Rev. 0, 12/29/95 Westinghouse Owner's Group 1/30/96 2:37 PM Page 2 of3
Program STEMGROW
- Calculations:
Stem sp min Lead eed := MotorSpeed*- - - * - -
60* sec OAR Stem speed = 0.3 * -
m sec
. CST thrust - Seat thrust Static r a t e : = - - - - - - - - Static rate= 12275. lbf CST time - Seat time sec Static rate ..:a:.. lbf Stiffuess := - - - - Suuuess = 40919 * -
Stem speed in Max open UnseatingRatio := ---=--- UnseatingRatio = 0.6244 Max close StemElongation := Travel*DeltaTemp*TempCoef StemElongation =0.0043 *in
- Final thrust := Max close + StemElongation* Stiflhess Final unseating:= UnseatingRatio*Final thrust Final thrust =7471 *lbf Final unseating = 4665 *lbf
- STEMGROW, Rev. 0, 12/29/95 Westinghouse Owner's Group 1/30/96 2:37 PM Page 3 o/3
-Program STEMGROW for SPS
- 1-RC-MOV-1535 Typical Thrust Trace Control Switch Trip
.-/'
Maxim!m Thrust Inputs:
Stem Travel (in) Travel = 2.25 *in DeltaTemp =300*F Change in Temperature (F)
In Mod. of Therm. Exp. (in/in F) TempCoef = 0.000006 *- -
in*F Max. Static Closing Force (lbf) Max close= 11205 *lbf Max. Static Unseating Force (lbf) Max open = 6992 *lbf Control Switch Trip Thrust (lbf) CST thrust = 9996 *lbf Control Switch Trip Time (sec) CST time = 50.139 *sec Thrust at Seating (lbf) Seat thrust= 1478 *lbf Time of Seating (sec) Seat time= 49.33 *sec 1
Motor Speed (rpm) MotorSpeed = 1700 * - .
mm Actuator Overall Ratio OAR=lOl.3 Stem Lead (in) Lead =0.2*in
- STEMGROW, Rev. 0, 12/29/95 Westinghouse Owner's Group 2119/96 5:02PM Page2of3
-Program STEMGROW
- Calculations:
min Lead Stem speed := MotorSpeed*- - - * - -
60* sec OAR Stem speed =0.056*-
in sec
. CST thrust - Seat thrust . lbf Static rate:= - - - - - - - - Static rate = 10529 * -
CST time - Seat time sec Static rate lbf Stiflhess := - - - - Stiflhess = 188222 *-.
Stem speed ID Max open UnseatingRatio := - - - - UnseatingRatio = 0.624 Max close SternElongation := Travel*DeltaTemp* TempCoef SternElongation = 0.0043 *in
- Final thrust := Max close+ StemElongation* Stiflhess Final unseating:= UnseatingRatio*Final thrust Final thrust= 12005 *lbf Final unseating =7491 *lbf
- STEMGROW. Rev. 0, 12/29/95 Westinghouse Owner's Group 2/19/96 5:02 PM Page 3 of3
-Program STEMGROW for SPS
- 1-RC-MOV-1536 Typical Thrust Trace Control Switch Trip
~
Maxim!m Thrust Inputs:
Stem Travel (in) Travel = 2.25 *in Change in Temperature (F) DeltaTemp =300 *F m
Mod. of Therm. Exp. (in/in F) TempCoef = 0.000006 *- -
in*F Max. Static Closing Force (lbf) Max close= 11685 *lbf Max. Static Unseating Force (lbf) Max open = 7291 *lbf Control Switch Trip Thrust (lbf) CST thrust= 10530 *lbf Control Switch Trip Time (sec) CST time =47.971 *sec Thrust at Seating (lbf) Seat thrust= 2564 *lbf Time of Seating (sec) Seat time= 47.45 *sec 1
Motor Speed (rpm) MotorSpeed = 1700 * - .
mm Actuator Overall Ratio OAR= 101.3 Stem Lead (in) Lead =0.2*in
- STEMGROW, Rev. 0, 12/29/95 Westinghouse Owner's Group 2/19/96 5:10PM Page 2 o/3
-Program STEMGROW
- Calculations:
min Lead Stem speed := MotorSpeed*- - - * - -
60* sec OAR Stem speed = 0.056 * -
lil sec
. CST thrust - Seat thrust . lbf Static rate:= Static rate = 15290 * -
CST time - Seat time sec Static rate Stiflhess := - - - - Stiflhess = 273328 *~bf lil Stem speed Max open UnseatingRatio := ---=--- UnseatingRatio = 0.624 Max close StemElongation := Travel*DeltaTemp*TempCoef StemElongation = 0.0043 *in
- Final thrust := Max close+ StemElongation* Stifihess Final unseating:= UnseatingRatio-Final thrust Final thrust= 12847 *lbf Final unseating = 8016 *lbf
- STEMGROW, Rev. 0, 12/29/95 Westinghouse Owner's Group 2/19/96 5:10PM Page3of3
Program STEMGROW for SPS
- 2-RC-MOV-25~,5 Typical Thrust Trace Control Switch Trip
.-,/
t Maximum Thrust Inputs:
Stem Travel (in) Travel = 2.25 *in Change in Temperature (F) DeltaTemp =300 *F in Mod. of Therm. Exp. (in/in F) TempCoef = 0.000006 *- -
in*F Max. Static Closing Force (lbf) Max close= 11883 *lbf Max. Static Unseating Force (lbf) Max open = 6298 *lbf Control Switch Trip Thrust (lbf) CST thrust = 10531 *lbf
. Control Switch Trip Time {sec) CST time =46.261 *sec Thrust at Seating (lbf) Seat thrust = 2626 *lbf Time of Seating (sec) Seat time = 45.523 *sec 1
Motor Speed {rpm) MotorSpeed = 1700 * - .
mm Actuator Overall Ratio OAR=lOl.3 Stem Lead (in) Lead = 0.2 *in
- STEMGROW, Rev. 0, 12/29/95 Westinghouse Owner's Group 1130/96 2:53 PM Page 2 of3
Program STEMGROW
- Calculations:
Stem sp min Lead eed := MotorSpeed*- - - * - -
60*sec OAR in Stem speed = 0.056
- sec
. CST thrust - Seat thrust Static r a t e : = - - - - - - - - Static rate = 10711
- lbf CST time - Seat time sec
. Static rate Stiifness : = - - - - Sti1fness = 191482. lbf Stem speed in
. . Max open U nseatmgRatto := _ __::..- UnseatingRatio = 0.53 Max close StemElongation := Travel*DeltaTemp*TempCoef StemElongation = 0.0043 *in
- Final thrust := Max close + StemElongation* Stiflhess Final unseating:= UnseatingRatio-Final thrust Final thrust= 12697 *lbf Final unseating = 6730 *lbf
- STEMGROW. Rev. 0, 12/29/95 Westinghouse Owner's Group 1130/96 2:53 PM Page 3 of3
-program STEMGROW for SPS
- 2-RC-MOV-2536 Typical Thrust Trace Control Switch Trip
.--/
Inputs:
Stem Travel (in) Travel = 2.25 *in
- Change in Temperature (F) DeltaTemp = 300 *F in Mod. of Therm. Exp. (in/in F) TempCoef = 0.000006.*- -
in*F Max. Static Closing Force (lbf) Max close= 13757 *lbf Max. Static Unseating Force (lbf) Max open= 5365 *lbf Control Switch Trip Thrust (lbf) CST thrust = 11995 *lbf Control Switch Trip Time (sec) CST time =45.517 *sec Thrust at Seating (lbf) Seat thrust = 1077 *lbf Time of Seating (sec) Seat time = 44. 792 *sec 1
Motor Speed (rpm) MotorSpeed = 1700 * - .
mm Actuator Overall Ratio OAR=I01.3 Stem Lead (in) Lead = 0.2 *in
- STEMGROW, Rev. 0, 12/29/95 Westinghouse Owner's Group 1/30/96 2:59PM Page2of3
f' ProgranfSTEMGROW
- Calculations:
Stem sp min Lead eed := MotorSpeed*- - - * - -
60* sec OAR Stem speed = 0.056 * -
in sec
. CST thrust - Seat thrust Static r a t e : = - - - - - - - - Static rate = 15059
- lbf CST time - Seat time sec Static rate Stifihess : = - - - - *Stifihess =269207 *l~f In Stem speed Max open UnseatingRatio := ------ UnseatingRatio = 0.39 Max close StemElongation := Travel* DeltaTemp* TempCoef StemElongation =0.0043 *in
- Final thrust ::;; Max close + StemElongation* Stifihess Final unseating := UnseatingRatio* Final thrust Final thrust= 14902 *lbf Final unseating = 5811 *lbf
- SI'EMGROW, Rev. 0, 12129/95 Westinghouse Owner's Group 1/30/96 2:59PM Page3of3
l Doc. No.: ME-0498, Rev. O
- ATTACHMENT 2 - PRESSURE LOCKXNG ANALYSXS USXNG WOG METHODS
-Program~PRESLOK, Version 1 - NAPS 1-RC-MOV-1535
- INPUTS:
Bonnet Pressure Upstream Pressure P bonnet = 2235 *psi P up = 1500 *psi Downstream Pressure p down = 3 *psi Disk Thickness t =0.761 *in (taken at centerline of the hub vertically)
Seat Radius a= 1.125 *in (corresponding to mean seat diameter}
Hub Radius (taken at plane of symmetry, b =0.63 *in perpendicular to the hub, radius of circle of equivalent area for non-circular hubs}
Seat Angle 0 =5 *deg Poisson's Ratio (disk material at temperature} v=0.3
- Modulus of Elasticity (disk material at temperature)
Static Pullout Force (measured value from diagnostic test}
E = 2.85* 10 7
F po =4075 *lbf
- psi Close Valve Factor VF =0.3 Stem Diameter D stem= 1.125 *in Hub Length Hub length =0.25 *in (from inside face of disk to inside face of disk}
- PRESLOK, Ver. 1, Rev. 0 12122/95 Westinghouse Owner's Group 2/7/96 9:33 AM Page 2 of5
Program PRESLOK,*Version 1
- PRESSURE FORCE CALCULATIONS Coefficient of friction between disk and seat:
µ := VF* cos(8) 1 + VF*sin(8)
µ =0.291 Average DP across disks:
Pup +P down DPavg := p bonnet - DPavg = 1483.5 *psi 2
Disk Stiffness Constants D := E*(t)3 6 D = 1.15*10 *lbf.in 12* (1 - v2)
E 7 G:=--- G = 1.096*10 *psi 2-(l+v)
Geometry Factors:
1*[ 1 - (;t(1 + 2-ln(~)) l C 2 =0.0807 C2 =
C3 = td[ (;r +1 }m(~)
2
+ (;) - 1]
C 3 =0.0105
-c 8 =0.7598 C 9 = ;.[ l; *.m(~) ~+ l *.[ 1- (;fl] C 9 =0.2783
. L3= 4~;*(( (;r + 1].m(;) + (;r -1]
L9 a l+v
[
- = -;* -
2 a
()
1-v
[ ( )2))_
--In -; + - -* 1 - -;
4 a L 9 =0
- PRESLOK, Ver. 1, Rev. 0 12/22/95 Westinghouse Owner's Group 217/96 9:33AM Page3of5
Program PRESLOK, Version 1
- Geometry Factors: (continued)
L11 = !*[ l+4*(?r- s-(;r- 4-(;r-[ 2+(;r]-m(~) l L 1l =0.0012 L l? = 1*[ ~ v_[ (;r]- (;t[
l- l l - l + (l + v)*fil(~) )) L 17 =0.0731 Moment 2
-DPavg* a [ C 9 ( 2 2) ]
M rb := . - - -* a - b - L 17 M rb =-241 *lbf C8 2*a*b lbf Q b = 1022.8 *-.
m Deflection due to pressure and bending:
2 3 4 a a DPavg*a -5 Ybq:=Mrb*n*C2+Qb*n*C3- D *Lu y bq = -1.0636* 10 *in
- Deflection due to pressure and shear stress:
Ksa =-0.142 2
K sa*DPavg*a -5 Ysq:= y sq =-3.1955*10 *m t*G Deflection due to hub stretch:
P force:= 1t* (a2 - b2).nPavg P force Hub length Ystretch :=
1t*b 2 *-( 2*E) y stretch = 1.4241 *10
-5
- m Total Deflection due to pressure forces:
-5 y q =-5.6832*10 *in
- Yq := Ybq + Ysq - Ystretch PRESLOK, Ver. l, Rev. 0 12/22/95 Westinghouse Owner's Group 2/7196 9:33 AM Page 4 of5
Program PRESLOK, Version 1
- Deflection due to seat contact force and shear stress (per lbf/in. ):
- = -[ 1.2-(;)-m(~)**1 y SW =-9.384*10
-8 m y SW t*G Deflection due to seat contact force and bending (per lbf/in. ):
(!)
Ybw =-(~)-[ (: :)*[ (**~ 9
)- L9 ]-[ (~)-c l 3 +L3 l y bw =-4.205* 10
-8 m (1:J Deflection due to hub compression:
y *= -(2*1t*a. Hub length) -8 y cmpr =-2.486*10 cmpr. 1t*b2 2*E Total deflection due to seat contact force (per lbf/in.):
-7 in Yw := Ybw+Y sw +y cmpr y w =-1.607*10 *--
(:)
- Seat Contact Force for which deflection is equal to previously calculated deflection from pressure forces:
F s := 2*1t*a*-
Yq F s =2499.1 *lbf Yw UNSEATING FORCES Fpacking is included in measured static pullout Force 1t 2 F piston:= *D stem .p bonnet F piston= 2221.6 *lbf 4
F vert := 1t*a2*sin(8)*(2*P bonnet-pup - p down) F vert = 1028.2 *lbf F preslock := 2*F s*(µ*cos(8) - sin(8)) F preslock = 1014.5 *lbf F total := - F piston + F vert + F preslock + F po F po =4075 *lbf *
- F total= 3896.1 *lbf PRESLOK, Ver. I, Rev. 0 12122/95 Westinghouse Owner's Group 217196 9: 33 AM Page 5 of5
/Y/e.-04 <}~ £ev- o
-Program PRESLOK, Version 1 - NAPS 1-RC-MOV-1536
- INPUTS:
Bonnet Pressure P bonnet = 2235 *psi Upstream Pressure P up = 1500 *psi Downstream Pressure p down = 3 *psi Disk Thickness t =0.761 *in (taken at centerline of the hub vertically)
Seat Radius a= 1.125 *in (corresponding to mean seat diameter)
Hub Radius (taken at plane of symmetry, b =0.63 *in perpendicular to the hub, radius of circle of equivalent area for non-circular hubs)
Seat Angle 8 =5 *deg Poisson's Ratio (disk material at temperature) v=0.3 7
Modulus of Elasticity (disk material at temperature) E =2.85*10 *psi Static Pullout Force F po= 3785 *lbf (measured value from diagnostic test)
Close Valve Factor VF =0.3 Stem Diameter D stem= 1.125 *in Hub Length Hub length = 0.25 *in (from inside face of disk to inside face of disk)
- PRESLOK, Ver. I, Rev. 0 12122/95 Westinghouse Owner's Group 2/7196 9:47 AM Page 2 of5
-- -Program PRES LOK, Version 1
- PRESSURE FORCE CALCULATIONS Coefficient of friction between disk and seat:
µ := VF* cos(9) 1 + VF*sin(9)
µ =0.291 Average DP across disks:
Pup +P down DPavg := p bonnet - --=----- DPavg = 1483.5 *psi 2
Disk Stiffness Constants 3 6 E*(t) D = 1.15*10 *lbf.in D *- ----=-~-
.- 12* (1 - v2)
E 7 G:=--- G = 1.096*10 *psi 2*(1 + v)
Geometry Factors:
=1*[1-(~f-(1+2-ln(~))] C 2 =0.0807 C2 C3 = 4bd[ (~r +1 ]-m(~)
2
+ (;) - 1] C 3 =0.0105 Cg =t[l+v+(l-v)*(~rl C 8 =0.7598 C 9 = ~-[ 1; v.m(~) +1~ v_[ 1- (~rll C 9 =0.2783 L3= 4*d[ (~r 1]-m(~) (~r -1]
+ +
[ ( )2))
a l+v a 1-v a
[ ()
L 9 := -;* *ln-; +-4-* 1- -; L 9 =0
- PRESLOK, Ver. 1, Rev. 0 12/22/95 Westinghouse Owner's Group 217/96 9:47 AM Page 3 of5
-- "Program PRESLOK,-Version 1
- Geometry Factors: (continued)
L11 = ~-[ 1+ 4* (?f -5 (?f- 4-(;t[ 2+ (;r]-m(~) l L l1 =0.0012 L 17 = 1-[ 1 - l ~ v-[ 1 - (?rl- (?t[ 1 +(I+ V)*ffi(~) )) L 17 =0.0731 Moment Mrb :=
-DPavg-a2 [ C 9 ( 2 C8 2)
. ---* a - b - L 17 2*a*b l M rb =-241 *lbf lbf Q b = 1022.8 *-.
m Deflection due to pressure and bending:
2 3 4 -5 a a DPavg*a Ybq := Mrb* D *C 2 + Q b" D *C 3 - D *L 11 Ybq =-1.0636*10 *in
- Deflection due to pressure and shear stress:
Ksa = -o.3-[ 2-m(~)- 1 + (?rl Ksa =--0.142 2
K sa*DPavg*a -5 Ysq=-3.1955*10 *m y sq:= t*G Deflection due to hub stretch:
P force:= 7t* (a2 - b2).nPavg p force Hub length Y stretch := 2 *-( 2 *E) Y stretch= 1. 4241 "10
-5
- m 7t*b Total Deflection due to pressure forces:
-5 y q =-5.6832*10 *m Y q := Ybq + Y sq - Y stretch
- PRESLOK, Ver. 1, Rev. 0 12/22/95 Westinghouse Owner's Group 2/7196 9:47 AM Page 4 of 5
--Program PRESLOK, Version 1
- Deflection due to seat contact force and shear stress (per lbf/in. ):
- = -r 1.2* (;)-m(~)**1 y SW =-9.384*10
-8 in y SW t*G Deflection due to seat contact force and bending (per lbf/in.):
- (~
9 Ybw = * (~)-[ (~ :)*[ (**~ )-Lg]-[ (~)-c3] +L3 l Ybw =-4.205*10
-8 m
(:)
Deflection due to hub compression:
- - (2*1t*a
- Hub length) -8 m y
cmpr .- - - - ---
2*E y cmpr =-2.486*10 *--
(!~
2 1t*b Total deflection due to seat contact force (per lbf/in.):
-7 m Yw := Ybw + Y sw + Y cmpr y w =-1.607*10 *--
(:)
- Seat Contact Force for which deflection is equal to previously calculated deflection from pressure forces:
F s := 2*1t*a*-
Yq F s = 2499.1 *lbf Yw UNSEATING FORCES F packing is included in measured static pullout Force 1t 2 F piston:= *D stem *P bonnet F piston= 2221.6 *lbf 4
F vert := 1t-a2-sin(0} (2 *P bonnet - pup - p down) F vert = 1028.2 *lbf F preslock := 2*F s*(µ*cos(0) - sin(0)) F preslock = 1014.5 *lbf F total := - F piston + F vert + F preslock + F po F po= 3785 *lbf
- F total= 3606.1 *lbf PRESLOK, Ver. 1, Rev. 0 12122/95 Westinghouse Owner's Group 217/96 9:47 AM Page 5 o/5
--Program-PRESLOK, Version 1 --NAPS 2-RC-MOV-2535
- INPUTS:
Bonnet Pressure Upstream Pressure P bonnet =2235 *psi Pup= 1500 *psi Downstream Pressure p down = 3 *psi Disk Thickness t =0.761 *in (taken at centerline of the hub vertically)
Seat Radius a= 1.125 *in (corresponding to mean seat diameter)
Hub Radius (taken at plane of symmetry, b =0.63 *in perpendicular to the hub, radius of circle of equivalent area for non-circular hubs)
Seat Angle 0 =5 *deg Poisson's Ratio (disk material at temperature) v=0.3
- Modulus of Elasticity (disk material at temperature)
Static Pullout Force (measured value from diagnostic test)
E =2.85* 107 F po =4556 *lbf
- psi Close Valve Factor VF =0.3 Stem Diameter D stem= 1.125 *in Hub Length Hub length =0.25 *in (from inside face of disk to inside face of disk)
- PRESLOK, Ver. l, Rev. 0 12122/95 Westinghouse Owner's Group 2/7196 9:57AM Page2of5
-- ~"Program-PRESLOK,-Version 1
- PRESSURE FORCE CALCULATIONS Coefficient of friction between disk and seat:
µ := VF* cos(8) 1 + VF*sin(8)
µ =0.291 Average DP across disks:
Pup +P down DPavg := p bonnet - 2 DPavg = 1483.5 *psi Disk Stiffness Constants 6
D := E*(t)3 D = 1.15*10 *lbf.in 12* (1 - v2)
E 7 G:=--- G = 1.096*10 *psi 2*(1 + v)
Geometry Factors:
c2=H1-(;J2-(1+2-m(~))] C 2 =0.0807
- C3 = 4b d[(;r l + I fil (~) + (;) 2 - I l C 3 =0.0105 Cg = 1*[ I+ v+ (I - v)*(;r] C 8 =0.7598
[ ( )2))
b l+v a 1-v b C9 := ;* [
- ln b +
- 1 - -;:
() C 9 =0.2783 L3 =4~;*(( faf + 1}m(;) + (;f- 1]
[-2-*ln;( )+-4-* [1- (; )2)).
a l+v a 1-v a Lg=O L9 := ;*
- PRESLOK, Ver. 1, Rev. 0 12/22/95 Westinghouse Owner's Group 2/7196 9:57 AM Page 3 o/5
- -Program PRESLOK, Version 1
- Geometry Factors: (continued)
L11 = ~-[ 1 +4*m 5-(ff- 4-(;t[ 2 (;r]-1n(~) l 2
- +
L 11 =0.0012 L 17 = 1*[ 1 - 1 ~ v-[ 1 - (?rl- (?t[ 1 + (1 + v)-ln~) )) L 17 =0.0731 Moment M rb :=
- DPavg*
C8 a2 .[- C- 9-* ( a2- b2) - L 17 2*a*b l Mrb =-241 *lbf lbf Q b = 1022.8 *-.
m Deflection due to pressure and bending:
2 3 4 -5 a a DPavg*a y bq := M rb. D *C 2 + Q b. D *C 3 - D .L 11 y bq =-1.0636* 10 *m
- Deflection due to pressure and shear stress:
Ksa =-0.142 2
K sa*DPavg*a _ -5 y sq =-3.1955*10 *m y sq:= t*G Deflection due to hub stretch:
P force:= 7t* (a2 - b2).nPavg P force Hub length
-5 .
Y stretch := 1t*b2 '(2.~ Y stretch= 1.4241 *10 *m Total Deflection due to pressure forces:
-5 Y q := Ybq + Y sq - Y stretch y q =-5.6832*10 *m
- PRESLOK, Ver. 1, Rev. 0 12/22/95 Westinghouse Owner's Group 217/96 9:57 AM Page 4 o/5
l
- Program PRESLOK, Version 1
- Deflection due to seat contact force and shear stress (per lbf/in. ):
y SW
- = -[ 1.2- (;)-m(~)**]
t*G y SW =-9.384*10
-8 in Deflection due to seat contact force and bending (per lbf/in. ):
(!)
Ybw =-(~)-[ (~ :)*[ (**~ 9
)-L 9 ]-[ (~)-c l 3 +L3 l Ybw =-4.205*10
-8 In
('!)
Deflection due to hub compression:
y *- -(2*1t*a. Hub length) -8 In cmpr .- 1t*b2 2*E y cmpr =-2.486* 10 *--
Total deflection due to seat contact force (per lbf/in.):
(!)
-7 In Yw := Ybw+Y sw +y cmpr y w =-1.607*10 . *--
(!)
- Seat Contact Force for which deflection is equal to previously calculated deflection from pressure forces:
F s := 2*1t*a*-
Yq Yw F s =2499.1 *lbf UNSEATING FORCES Fpacking is included in measured static pullout Force 1t 2 F piston:= *D stem .p bonnet F piston = 2221.6 *lbf 4
F vert := 1t-a2-sin(9)* (2 *P bonnet - pup - p down) F vert = 1028.2 *lbf F preslock := 2*F s*(µ*cos(9) - sin(8)) F preslock = 1014.5 *lbf F total*:= -F piston + F vert + F preslock + F po F po= 4556 *lbf F total =4377.1 *lbf PRESLOK, Ver. l, Rev. 0 12122/95 Westinghouse Owner's Group 217/96 9:57 AM Page 5 of5
- -Program PRESLOK, Version 1 - NAPS 2-RC-MOV-2536
- INPUTS:
Bonnet Pressure P bonnet = 223 5 *psi Upstream Pressure P up = 1500 *psi Downstream Pressure p down = 3 *psi Disk Thickness t = 1.01 *in (taken at centerline of the hub vertically)
Seat Radius a= 1.62*in (corresponding to mean seat diameter)
Hub Radius (taken at plane of symmetry, b = 1.056*in perpendicular to the hub, radius of circle of equivalent area for non-circular hubs)
Seat Angle 0 =7 *deg Poisson's Ratio (disk material at temperature) V =0.3 Modulus of Elasticity (disk material at temperature) E = 2.85* 107 *psi Static Pullout Force F po= 1285 *lbf (measured value from diagnostic test)
Close Valve Factor VF =0.55 Stem Diameter D stem= 1.25 *in Hub Length Hub length = 0.61 *in (from inside face of disk to inside face of disk)
- PRESLOK, Ver. 1, Rev. 0 12122/95 Westinghouse Owner's Group 217/96 10:05AM Page2of5
-Program-PRESLOK, Version 1
- PRESSURE FORCE CALCULATIONS Coefficient of friction between disk and seat:
µ := VF* cos(8) 1 + VF*sin(0)
µ =0.512 Average DP across disks:
Pup +P down DPavg := p bonnet - DPavg = 1483.5 *psi 2
Disk Stiffness Constants 6
D := E*(t}3 D = 2.689* 10 *lbf.in 12* (1 - v2)
G:=---
E G = 1.096* 107 *psi 2*(1 + v)
Geometry Factors:
2
=1[1-m (1+2*ln(t))] C 2 =0.0529 Cz C 3 =0.0057 c8 =1*[1+v+(l-v)*(;r] C 8 =0.7987 C 9 = ;-[ ;
1
- -1n(t) + 1 ~ *.[ 1 - (;rl] C 9 =0.2469 L3= 4"d[ (;r + 1]-1n(;) + (;r -1]
L 9 = ;-[ 1; *-m(;) 1 ~
+ V [ l _ (;r)) L9 =o
- PRESLOK, Ver. 1, Rev. 0 12/22195 Westinghouse Owner's Group 2/7/96 10:05AM Page 3 o/5
Program PRESLOK, Version 1
- Geometry Factors: (continued}
L11 = ~-[ 1+4*(?J2- s-(?f- 4-(?r-[ 2+(?r]-m(~)] L 11 =5.1809*10
-4 L 17 = 1-[ I - I~ v-[ I - (?rl- (t[ I+ (I+ v)*m(~) )) L 17 =0.0488 l
Moment M rb :=
- DPavg* a2 . [- C- 9-* ( a2 - b2) - L 17 Mrb =-292.9 *lbf C8 2*a*b lbf Q b = 1060.1 *-.
m Deflection due to pressure and bending:
2 3 4 a a DPavg*a -6 Ybq:=Mrb*n*C2+Qb*n*C3- D *Lu Ybq =-7.6059*10 *m
- Deflection due to pressure and shear stress:
K** = -o.3-[ 2-m(~)- 1 (?r] + K sa =--0.0842 2
K sa*DPavg*a -5 y sq:= t*G y sq =-2.9623*10 *m Deflection due to hub stretch:
P force:= 7t* (a2 - b2).nPavg p force Hub length Ystretch :=
1t*b 2 *-( 2*E) y stretch =2.1487*10
-5
- m Total Deflection due to pressure forces:
-5 Yq := Ybq + Ysq - Ystretch y q =-5.8716* 10 *in
- PRESLOK, Ver. J, Rev. 0 12122/95 Westinghouse Owner's Group 2/7196 10:05 AM Page 4 of5
(YIE-049~ Kev. 0 Program-PRESLOK, Version 1
- Deflection due to seat contact force and shear stress (per lbf/in. ):
Ysw *
- = -l (;)-1n(~)**]
1.2*
y SW =-7.514*10
-8 In t*G Deflection due to seat contact force and bending (per lbf/in. ):
(:)
9 Ybw = -(~)-[ (~ :)*[ (**~ )-L 9]-[ (~)*C3 +L3 l l Ybw =-2.592*10
-8 In
(:)
Deflection due to hub compression:
y *- -(2*1t*a. Hub length) -8 in cmpr .- 1t*b2 2*E y cmpr =-3.109*10 *--
(:)
Total deflection due to seat contact force (per lbf/in.):
-7 In Yw := Ybw+Ysw+Ycmpr y w =-1.322*10
(:)
- Seat Contact Force for which deflection is equal to previously calculated deflection from pressure forces:
F s := 2*1t*a*-
Yq Yw F s = 4522.2 *lbf UNSEATING FORCES Fpacking is included in measured static pullout Force 1t 2 F piston:= *D stem *P bonnet F piston= 2742.8 *lbf 4
F vert := 1t*a2-sin(8)* (2*P bonnet - pup - p down) F vert = 2981.2 *lbf F preslock := 2*F s*(µ*cos(8) - sin(8)) F preslock = 3490.5 *lbf F total := - F piston + F vert + F preslock + F po F po= 1285 *lbf F total= 5013.9 *lbf PRESLOK, Ver. J, Rev. 0 12122/95 Westinghouse Owner's Group 217/96 10:05 AM Page 5 of5
Doc. No.: ME-0498, Rev. o ATTACHMENT 3 CALCULATION REVIEW
- CHECKLIST AND ATTACHED REFERENCES
ATTACHMENT 8.5 NDCM 3.7 Rev. 5 CALCULATION REVIEW CHECKLIST CALCULATION NO.
I REV. NO.
I ME-0498 0 ATTACHMENT 3 PAGE 1 OF i CALCULATION TITLE: Pressure Locking/Thermal Binding Analysis for GL 89-10 A "NO" answer to any questions requires that an explanation be provided.
NOTE: Reference may be made to explanations contained in the calculation.
QUESTIONS YES NO N/A
- 1. Is the calculation number and revision identified [x] [ ] [ ]
on each page of the calculation and attachments?
- 2. Does the objective statement identify the reason [x] [ ] [ ]
for performing the calculation and give sufficient background information?
- 3. Have the sources of design inputs been correctly [x] [ ] [ ]
selected and referenced in the calculation?
- 4. Are the sources of design inputs up-to-date and [x] [ ] [ ]
retrievable (and/or a copy attached to the calc.)?
- 5. Where appropriate, have the other disciplines [ ] [ ] [X]
reviewed or provided the design inputs for which they are responsible?
- 6. Have design inputs been confirmed by analysis, [x] [ ] [ ]
test, measurement, field walkdown, or other pertinent means as appropriate for the configuration analyzed?
- 7. Are assumptions adequately described and bounded by [x] [ ] [ ]
the Station Design Basis?
- 8. Have the bases for engineering judgements been [x] [ ] [ ]
adequately and clearly presented?
- 9. Were appropriate calculation/analytic methods [x] [ ] [ ]
used and are outputs reasonable when compared to inputs?
- 10. Are computations technically accurate and has [x] [ ] [ ]
the calculation made appropriate allowances for instrument errors and calibration equipment errors? (Reference STD-EEN-0304)
- 11. Have those computer codes used in the calculation [x] [ ] [ ]
been listed in the "references" or has a state-ment been placed in the "methods of analysis" section which states - "No computer code used.", if no computer codes were used?
- 12. Have all exceptions to station design basis [x] [ ] [ ]
criteria and reg~latory requirements been identified and ju~tified in accordance with ANSI N45.2.11-1974?
Comments: (N/A if none) ~~--=N_A'--~~~~~~~~~~~~~~~~~~~~~
[ J Additional comment pages added.
Date: Date:
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- Memorandum R...e WB,vi ce.. 3 VIRGINIA POWHI NOHTH CAROLINA POWHI To Mr. P. D. Jones - IN1NW Innsbrook Technical Center FrQm B. DeMars - IN1NW February 8, 1996 DESIGN INPUTS FOR CALCULATION ME-0498 REV. 0 The following pressures should be used in the determination of the opening requirements for the following North Anna valves:
1-RC-MOV-1535/1536 Bonnet pressure - 2235 psig 2-RC-MOV-2535/2536 Upstream pressure - 1500 psig Downstream pressure - 3 psig The bonnet pressure is the operating pressure of the pressurizer. It is postulated that steam condensate is trapped in the bonnet at this pressure during a SGTR event. Ref.
NCRODP - 38 Reactor Coolant System The upstream pressure was estimated to be the minimum pressure at which the PORV block valves would be called upon to open to depressurize the RCS in the event of a SGTR. This pressure was based on using the Surry SGTR analysis for minimum case safeguards. Ref. SPS UFSAR Figure 14.3-3 The downstream pressure was based on the operating pressure of the primary relief tank. Ref. NCRODP - 38 Reactor Coolant System B. DeMars cc: E.W. May - IN1 NW J. J. Wolak - IN1 NW
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- WESTINGHOUSE ELECTRIC CORPORATION SYSTEMS & MAJOR PROJECTS DIVISION I MSE COVER SHEET FOR TELECOPY NO. (412) 374:6639 WIN: 284:6639 LOCA110N: - - - - - - - - - - - - - - - - - - - -
TELECOl'Y NO.: ---=g';._o_t/_-_~_7_3_-_~_/i_tf _______
CONFIRMATION NO.:_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
- /3731:>77.
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FROM: ___,;,.__,c....71,....,,__._)?1.;....o.=;;;~......-=.a,,,.____ PHONE: ~ ~0)
DA TE: _1..;;.._/3_/_.;..A_,-'_ _ TELECOPY NO.: l412l 374§639 WIN: 284-6639 or: 284-6647
- NUMBER OF PAGES INCLUDING COVER SHEET _ _ / __
f113: -oLf'f O eev. 0
- . /<c.~ceC/
f Page I USER'S GUIDE FOR PRESLOK, A GATE VALVE PRESSURE LOCKING ANALYSIS PROGRAM USING THE COMMONWEALTH EDISON MODEL REVISION 0 January 2, 1996 While this information is presented in good faith and believed to be accurate, the Westinghouse Owner's Group does not guarantee satisfactory results from reliance upon such information.
Nothing* contained herein is to be construed as a warranty, express or implied, regarding the performance, merchantability, fitness or any other matter with re~pect to the product, nor as a
- recommendation to use any product or process in conflict with any patent. The Westinghouse Owner's Group reserves the right, without notice, to alter or improve the methods described herein.
- plsh1213.wpf 0102961534
/VI£ -C) 4'1 'i/ Uv. C)
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- Page 2 USER'S GUIDE FOR PRESLOK GATE VALVE PRESSURE LOCKING ANALYSIS PROGRAM USING THE COMMONWEALTH EDISON MODEL RECORD OF REVISION PAGE Rev. 0 Original Issue January 2, 1996
- plsh1213.wpf 0102961534
Page 3
- USER'S GUIDE FOR PRESLOK GATE VALVE PRESSURE LOCKING ANALYSIS PROGRAM USING THE COMMONWEALTH EDISON MODEL TABLE OF CONTENTS SECTION PAGE NO.
TITLE PAGE l REVISION
SUMMARY
2 TABLE OF CONTENTS 3 INTRODUCTION 4 HARDWARE/SOFTWARE REQUIREMENTS 5 GETIING STARTED 6
- 7 RUNNING THE PRESLOK ANALYSIS INPUT PREPARATION 9 THEORY 11 EXAMPLE USING PRESLOK VERSION 1 20 EXAMPLE USING PRESLOK VERSION 2 26 REFERENCES 32
- plsh1213.wpf 0102961534
M fZ -o C/fJ; t.~.1 £J R.e...C... q
-l:JSER'S GUIDE FOR PRESLOK Page 4
- INTRODUCTION Pressure locking is a phenomenon which can cause the unseating thrust for a gate valve to increase dramatically from its typical static unseating thrust. This can possibly result in the valve failing to open due to the actuator having insufficient thrust capability. Pressure locking can also result in valve damage in cases where the actuator thrust capability exceeds the valve structural capacity. For these reasons, a proper understanding of the conditions which may cause pressure locking, as well as a methodology for predicting the increase in unseating thrust for a pressure locked valve, are necessary.
A method of analyzing gate valves to predict the increase in unseating thrust for a pressure locked valve has been developed by Commonwealth Edison, and has been presented by Mr. Brian Bunte (Ref. l). The Westinghouse Owner's Group, in the Pressure Locking/Thermal Binding Task Team meeting on November 13 and 14, 1995, authorized the preparation of a MATHCAD program and accompanying user's manual to allow the uniform use of the Commonwealth Edison pressure locking analysis methodology. This manual is the result of that authorization.
This manual and the program file for perfonning the analysis are available from the Westinghouse Owner's Group and may be obtained by contacting L. I. Ezekoye at
- (412) 374-6643 or W. E. Moore at (412) 374-6351. Please indicate whether the program is to be supplied on 3.5 inch diskettes or 5.25 inch diskettes.
- plsh1213.wpf 0102961534
\
M.E-oLf9 ~ t..ev. o IZe.J2_ q USER'S GUIDE FOR PRESLOK Page 5
- HARDWARE/SOFfW ARE REQUIREMENTS The program has been written using the MATHCAD 5.0 for Windows program. This program is available from MathSoft, Inc.
101 Main Street Cambridge, MA 02142 1-800-628-4223 or 617-577-1017 Fax: 617-577-8829 The program is also widely available from software vendors.
The following hardware and software requirements for running the MATHCAD 5.0 for Windows program are extracted from the User's Guide which is supplied with the MATHCAD program:
- An 80386 or higher IBM or compatible computer. A math coprocessor is not required, but its presence will significantly improve performance.
- Microsoft Windows' Version 3.1 or later or Windows NT.
At least 4MB of RAM. All memory above 640K should be configured as extended memory.
At least 14MB of free hard disk space for MATHCAD files.
- An additional 1MB on the hard disk where MATHCAD is installed.
- At least 8MB of virtual memory. See the Windows user manual for how to specify virtual memory.
- A monitor and graphics card compatible with Windows.
- A mouse supported by Windows.
- Any printer supported by Windows.
The User's Guide supplied with the MATHCAD program should be followed for installation of the MATHCAD program onto your computer. The scope of this manual is to explain the usage of the PRESLOK analysis using the MATIICAD program.
- plsh1213.wpf 0102961534
A i;_.-64 Cf;;, 12.e. v ,. o fle!. 1 USER'S GUIDE FOR -PRESLOK Page 6 GETTING STARTED The PRESLOK files are supplied to you on either a 3.5 inch or a 5.25 inch diskette, per your request It is recommended that the first step to use the files is to cepy a "working version" of the files to your hard disk so that the diskette can be retained as a record copy. The files which are included are as follows:
preslokl.mcd MA1HCAD program using the closing valve facter as an input.
preslok2.mcd MATHCAD program using the coefficient of friction between disk and seat as an input plinputl.dat ASCII file of input data required by version 1 of the PRESLOK program.
plinput2.dat ASCII file of input data required by version 2 of the PRESLOK program.
The next step to use the program is to create a data file to transfer the input values for the variables to the PRESLOK analysis program. The PRESLOK program is
- expecting these variables to appear in text file in plain ASCII format with the name "plinputl.dat" for use with version 1 or "plinput2.dat" for use with version 2. The various numbers in the "plinputl.dat" or "plinput2.dat" file can be separated by spaces, commas, or carriage returns, and may appear as integers, floating point numbers, or as E-format numbers such as 2.35E-2 . An ASCII text file can be created using the Windows utility Notepad, or by numerous other methods. This file should be located in the same directory as the PRESLOK file, since when the PRESLOK file is loaded, that directory will become the MATHCAD default directory. The user is also referred to the chapter on "Data Files" in the MATHCAD User's Guide if further explanation of the use of the ".dat" file is needed.
Sample data files are included in the program diskette which can be used simply by changing the _input values to the proper values for your analysis. Alternately, other file names can be used for the input data by changing the input file name on the page 1 of the PRESLOK program to the file name desired .
- plsh1213.wpf 0102961534
USER'S GUIDE FOR PRESLOK Page 7 RUNNING THE PRESLOK ANALYSIS At this point it is assumed that the user has the MATHCAD 5.0 program loaded onto his computer, and that the PRESLOK Version 1 or PRESLOK Version 2 file and the "plinputl.dat" or "plinput2.dat" file are available to the computer in the same directory. To run the PRESLOK analysis, the user should perform the following steps:
- 1. Double click on the MATHCAD 5.0 icon to start the MATHCAD program.
- 2. Go to the File pulldown menu and click on Open (or click on the Open File icon on the Tool Bar.)
- 3. In the Open dialogue box, select the directory containing the preslokl.mcd or preslok2.mcd file and select the desired version of the program. Then click on OK.
- 4. The PRESLOK program will pick up the input values from the plinputl.dat or plinput2.dat file and perform .the analysis if the program is in the automatic mode (Automatic Mode has a check mark next to it in the Math pulldown menu.) If the MATHCAD program is not in the automatic mode, it can be
- forced to perform the calculation by clicking on the Calculate Document function in the Math pulldown menu. Results may be inspected by using the scroll bar on the right hand side of the display to scroll through the display as desired.
- 5. To change the inputs, open the Windows utility Notepad and open the plinputl.dat or plinput2.dat file. Make the desired changes to the file and then save it To have MATIICAD re-perform the analysis with the new input values, open the Math pulldown menu and click on Calculate Document This alternate use of Notepad and the MATHCAD function Calculate Document should be repeated until the analysis is correct 6 The oµtput may be printed using the Print command in the pulldown menu under File or using the print icon in the Tool Bar. The user is referred to the MATiiCAD User's Guide if any changes are desired to the Page Setup or the Printer Setup.
Note that valve identifiers or other identifying titles may be added to the output by using the MATHCAD text entry methods given in the MATiiCAD User's Guide. If the user desires to add the identifier/title to each page, the use of a header is recommended. The header can be defined through the Headers/Footers command in the Edit pulldown menu or through the Header command in the Page Setup dialogue box. See the Documents and Windows plsh1213.wpf 0102961534
\
USER'S GUIDE FOR PRESLOK Page 8
- RUNNING THE PRESLOK ANALYSIS (continued) section of the MATHCAD User's Guide for further information about Headers.
- 7. The program may be exited using the Exit command in the File pulldown menu.
- .-- Seo. t J
Angle i
LHub Length Disk Thickness FIGURE 1 Disk GeoMetry
- plsh1213.wpf 0102961616
t1£-04-f'8 e_e.v, 0 R.~~f USER'S GUIDE FOR PRESLOK Page 9 INPUT PREPARATION The following inputs are required for the use of the PRESLOK analysis using version 1 of the program:
- Pressure Conditions at the time of the pressure locking event. This includes the upstream, downstream, and bonnet pressure.
Bonnet Pressure: Pbonnet psi Upstream Pressure: pup psi Downstream Pressure: pdown psi
- Valve Disk Geometry. This includes the hub radius, hub length, mean seat radius, average disk thickness, and seat angle.
Disk Thickness: t inches Seat Radius: a inches Hub Radius: \ ,. b inches
'\.
Hub Length: Hublength inches Seat Angle: 8 degrees The disk thickness recommended for use in these calculations is the thickness at the centerline of the disk vertically. See Figure 1. This will normally be a value which is intermediate between the minimum and maximum thickness of the disk, and this is the thickness which has been used in the comparisons of test measurements which Commonwealth Edison is making with the analytical results. It is noted that the magnitude of the pressure locking force increases with the thickness of the disk, so that use of the maximum disk thickness would yield conservative results. The pressure locking forces predicted by using the maximum value of disk thickness are likely to be unreasonably high though.
The seat radius used in these calculations is the mean seat radius which corresponds to the radius at which one half of the seat area would be outside the mean seat radius and one half of the seat area would be inside the mean radius. Thus, given the inner and outer seat diame~ers, the mean seat radius is 2 2 OD#Ill + IDseat a =
8
- plsh1213.wpf 0102961534
/J,J£--04'18 e.-e:..v, 0 Ref{ 'I
-usER'S GUIDE FOR-PRESLOK Page 10 When the hub cross-section is not reasonably circular (e.g. many Westinghouse gate valve designs), then an effective hub radius is used which corresponds to a circle of equal area to the hub cross-sectional area.
b = ~ Hub:ea The hub length is the distance from the inside face of the hub to the inside face of the hub at the hub radius, as shown on Figure 1. The seat angle is as shown on Figure 1.
- Valve Disk Material Properties. This includes the modulus of elasticity and the Poisson's ratio for the disk base material, at the temperature being considered.
Poisson's Ratio: V dimensionless Modulus of Elasticity: E psi
- Valve Stem Diameter Stem Diameter: Dstem inches This is the stem diameter in the region of the stem which is inside the packing.
- Static Unseating Thrust Static Pullout Force: pounds This is the static pullout force obtained from testing of the valve for which the calculation is being perfonned.
- Closing Valve Factor Valve Factor: VF dimensionless It is suggested that this valve factor be the factor obtained from test measurements of closing the valve being considered in a DP test, if possible. -
To use version 2 of the program instead of version l, the closing valve factor VF is replaced by the co-efficient of friction to be considered between the disk and the seat, and the input data file is named plinput2.dat All other inputs remain the same as for version 1. The different input value is
- Coefficient of Friction between Disk and Seat Seat to Disk Coefficient of Friction: µ dimensionless plsh1213.wpf 0102961534
/11£ -0¥/f R..e.v. o Re!! 'f USER'S GUIDE FOR -PRESLOK Page 11 THEORY ASSUMPTIONS
- 1. The valve disk is assumed to act as two ideal disks connected by a hub. That is, the disks are assumed to be round, of uniform thickness, and perpendicular to a cylindrical, concentric hub. A line perpendicular to the hub centerline and at the middle of the hub length is an axis of symmetry for the wedge. The equations in reference 2 for this idealized structure are assumed to conservatively model the actual load due to* pressure forces. This assumption is considered conservative since inspection of the disk drawings show large fillets between the disk hub and seats which should make the valve disk stiffer than assumed in the reference 2 equations.
- 2. The coefficient of friction between the valve seat and disk is assumed to be the same under pressure locking conditions as it is under DP conditions. This assumption is considered to be justified based on bench marking of the calculations against ComEd and EPRI pressure locking test data for similar flex-wedge gate valves.
- 3. The upstream, downstream, and bonnet pressure values are considered to be known.
DESIGN INPUTS The following design inputs are used in calculating the force required to unseat a pressure locked MOV:
- Pressure Conditions at the time of the pressure locking event. This includes the upstream, downstream, and bonnet pressure.
- Bonnet Pressure: Pbonnet psi Upstream Pressure: pup psi Downstream Pressure: P down psi
- Valve Disk Geometry. This includes the hub radius, hub length, mean seat radius, and average disk thickness.
Disk Thickness: t inches Seat Radius: a inches
- Hub Radius:
plsh1213.wpf 0103960823 b inches
M£-oq9~ fe.v. o fe.e+- q USER'S GUIDE FOR PRESLOK Page 12
- Hub Length:
Seat Angle:
Hublength 0
inches degrees The disk thickness recommended for use in these calculations is the thickness at the centerline of the disk vertically. See Figure 1. This will normally be a value which is intermediate between the minimum and maximum thickness 0f the disk, and this is the thickness which has been used in the comparisons 0f test measurements which Commonwealth Edison is making with the analytical results. It is noted that the magnitude of the pressure locking force increases with the thickness of the disk, so that use of the maximum disk thickness would yield conservative results. The pressure locking forces predicted by using the maximum value of disk thickness are likely to be unreasonably high though.
The seat radius used in these calculations is the mean seat radius which corresponds to the radius at which one half of the seat area would be outside the mean seat radius and one half of the seat area would be inside the mean radius. Thus, given the inner and outer seat diameters, the mean seat radius is 2
ODseat 2 .
+ JDff4t a =
8 When the hub cross-section is not reasonably circular (e.g. many Westinghouse gate valve designs), then an effective hub radius is used which corresponds to a circle of equal area to the hub cross-sectional area..
b = ~ Hub"Area The hub length is the distance from the inside face of the hub to the inside face of the_ hub at the hub radius, as shown on Figure 1. The seat angle is as shown on Figure 1.
- Valve Disk Material Properties. This includes the modulus of elasticity and the Poisson's ratio for the disk base material.
Poisson's Ratio: .v dimensionless Modulus of Elasticity: E psi
- Valve Stem Diameter
- plsh1213.wpf Stem Diameter:
0102961534
\,
inches
USER'S GUIDE FOR PRESLOK Page 13 This is the stem diameter in the region of the stem which is inside the packing.
Static Unseating Thrust Static Pullout Force: Fpo pounds This is the static pullout force obtained from testing of the valve for which the calculation is being performed.
- Coefficient of Friction between Disk and Seat Seat to Disk Coefficient of Friction: pl dimensionless The analysis program is presented in two versions, one of which requires that the coefficient of friction to be used between the disk and the seat be input directly, and the other which allows the input of the closing valve factor instead. For the version which allows the input of the closing valve factor, the coefficient of friction is calculated as follows:
µ=VF*-----
cos e 1 + VF* sin 8
- CALCULATIONS The methodology for calculating the thrust required to open the MOV s under the pressure locking scenario is based on the Reference 2 (Roark's) engineering handbook.
The methodology determines the total force required to open the valve under a pressure locking scenario by solving for the four components to this force. The four components of the force are the pressure locking component, the static unseating component,. the piston effect component, and the "reverse piston effect" component.
These magnitudes of these components are determined using the following steps:
Pressure Loc~ng Component of Force* Required to Open the Valve The valve disk is modeled as two plates attached at the center by a hub which is concentric with the valve disk. A plane of symmetry is assumed between the valve disks. This plane of symmetry is considered fixed in the analysis.
plsh1213.wpf 0102961534
/11(3_-o4C/8.I /_-e.v. o l<..e..f q USER'S GUIDE FOR PRESLOK Page 14
- Plane of Symmetry Axis of Modeled As: Symmetry
- Based on this geometry, the following constants are calculated using the reference 2 equations:
Average DP Across Disk pup + p dDwn DPavs = pbonna - 2 Disk Stiffness Constants D = __E_*t_3_
2
_12*(1-v )
E G=---
2 *(1 +v)
- plsh1213.wpf 0102961607
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USER'S GUIDE FOR PRESLOK Page 15
- Geometry Factors C, = !{1-( !j(1 +2*ln(: ))]
c, = !m:r +lH:H:J-i}
Deflection Due To Pressure Force The pressure force is assumed to act uniformly upon the inner surface of the disk between the hub diameter and the outer disk diameter. The outer edge of the disk is assumed to be unimpeded and allowed to deflect away from the pressure force. In addition, the disk hub is allowed to stretch. The total displacement at the outer edge of the valve disk due to shear and bending and due to hub stretch are calculated using the reference 2 equations.
Corresponding Equations (r0 = b for Case 2L)
Additional Geometry Factors
- plsh1213.wpf 0102961534
M != ?t?Y t!.ev. U
/ R.e.J:. q USER'S GUIDE FOR PRESLOK Page 16 Moment Factors (r0 = b for Case 2L)
M rb
= -DPavs' Cs a2[ C9 ( z -r z) -L 2*a*b a o 17 l
-DP Q .;,
b 2*b mw(a2 _ r.02)
Bending Deflection due to Pressure Shear Deflection due to Pressure (r0 = b for Case 2L)
'l..c>A,t.i::...
.. ~:;., -
..,,... J. ,.. f,(I j),~~*
6!> .,.. /V>t) ~., R!
K *DP *a 2 y= $4 avg sq t*<J Deflection from Hub Stretch due to Pressure Pfo,u = 1e(a 2 - b2 )*DPavg pforce Hublnwth y = --------
strdda 1t *b2 2E Total Deflection due to Pressure Yq = Y1,q + Ysq + YS1rrte1a An evenly distributed force is assumed to act between the valve seat and the outer edge of the valve disk. This force acts to deflect the outer diameter of the valve disk inward and to compress the disk hub. The pressure force is reacted to by an increase in this contact force between the valve disk and seats. The valve body seats are conservatively assumed to be fixed. Therefore, the deflection due to the known pressure load must be balanced by the deflection due to the unknown seat load. The deflection due to the pressure force was previously calculated. Now, the reference 2 plsh1213.wpf 0102961534
M. F - 09f'¥; (2_e_rr, o Re..f:. 'I USER'S GUIDE FOR PRESLOK Page 17 equations are used to detennine the contact force between the seat and disk which results in a deflection which is equal and opposite to the deflection due to the pressure force. This is done by first calculating the amount deflection created by a unit load of seat contact force (w = 1 lb/in). The equilibrium contact load is then determined by dividing the deflection caused by the unit contact load into the previously calculated deflection due to the pressure force. The equations are provided below:
Additional Geometry Factors (For Case lL, r0 = a, :~~ = 4 =0 Bending Deflection due to Seat Load (r0 = a) 3 a [ C2 ( 'o *C9 Y1,w = - D. Cg * , ; - - L9 ) - ,'o;*C3
- +~
]
- Shear Deflection due to Seat Load K84 = - 1.2; 1n( ; )
(r0 = a) a Y1,w = Ksa t *G Deflection from Hub Compression Due to Seat Load (w = 1, :.Compressive force= 2 1t a)
= _ 21t a ( Hublengrh)
Ycompr 1t b2 2E Total Deflection from Unit Seat Load (w = 1)
Therefore, the equilibrium contact load distribution (lb/in) and the corresponding load applied to each seat is calculated using the relationship below:
- plsh1213.wpf 0102961534
f1. C- 0 4 ~; !C-ev.. o Re.~- q USER'S GUIDE FOR PRESLOK Page 18 wequilibrizun = Yq , where y w is calculated for w = 1 Yw UJad per seat = 21'a(;:)
Determining The Disk To Seat Friction Coefficient Several methods can be used to determine an appropriate seat to disk friction coefficient. The coefficient of friction between the seat and disk is perhaps best determined based on the open valve factor from a DP test However, due to the difficulty sometimes encountered in obtaining a good, consistent valve of the opening valve factor from testing, the PRESLOK program is written to accept a closing valve factor or a co-efficient of friction directly. The equation used to calculate the coefficient of friction from the closing valve factor is given in the Design Inputs section of this User's Manual.
- The stem force required to overcome the contact load between the seat and disk which opposes the pressure force is equal to:
(seat load) x [µ cos 0 - sin 0 ] x 2 (for two disk faces).
Static Unseating Force The static unseating force represents the opening packing load and the pullout force due to wedging of the valve disk during closure. These loads are superimposed on the loads due to the pressure forces which occur during pressure locking. The value for this force is based on static test data for the MOV s.
Piston Effect The piston effect due to valve internal pressure exceeding outside pressure is calculated using the standard industry equation. This force assists movement of the valve stem in the open direction.
Fpiston effect = =D;em (p bollMt - pazm}
Reverse Piston Effect (FverJ
- The reverse piston effect is the term used in this calculation to refer to the pressure plsh1213.wpf 0102961534
- : I fr! E-o 1?~ /2.e v: e, Ref- q
-usER'S GUIDE FOR PRESLOK Page 19 force acting downward against the valve disk. This force is equal to the differential pressure across the valve disk times the area of the valve disk times the sine of the seat angle times 2 (for two disk faces).
Fw:rt = 1t *a 2 *sin.8*(2*Pbonnet - Pup - Pdt!wn )
p bonnet Jseat p
outlet P.
bonnet Total Force Required to Overcome Pressure Locking As mentioned previously, the total stem force (tension) required to overcome pressure locking is the sum of the four components discussed above. All of the terms are positive with the exception of the piston effect component.
The acceptance criteria recommended for use in this calculation is that the available motor operator thrust capability be at least 120% of that required to unseat the MOV under pressure locking conditions. The 20% margin is provided to allow for uncertainty in the measurement of stem factor, open valve factor, static unseating thrust as well as other effects such as stem factor variation and motor-to-motor torque capability variations. All of these eff~cts are random in nature.
plsh1213.wpf 0102961612
ME -o4t:/'f) 12.ev~ o f1...~-t 9 USER'S GUIDE FOR PRESLOK Page 20
- EXAMPLE OF AN ANALYSIS PERFORMED WITH PRESLOK, VERSION 1 The following is an image of the input file plinputl.dat used to run an example problem on version 1 of the PRESLOK analysis program:
1005 380 350 2 4.36 1.25 o:5 5 0.3 27.6E6 1.875 15409 0.52 The input file corresponds to input values as shown:
Bonnet Pressure: Pbonnet = 1005 psi Upstream Pressure: Pup= 380 psi Downstream Pressure: P down = 350 psi Disk Thickness: t = 2.00 inches Seat Radius: a = 4.36 inches Hub Radius: b = 1.25 inches Hub Length: L = 0.50 inches
- Seat Angle:
Poisson's Ratio:
Modulus of Elasticity:
Stem Diameter:
8 = 5 degrees V = 0.3 E = 27,600,000 psi Dstem = 1.875 inches (dimensionless)
Static Pullout Force: Fpo = 15,409 pounds Valve Factor: VF= 0.52 (dimensionless)
The next five pages contain the output of the PRESLOK program, Version l, using the above input.
- plsh1213.wpf 0102961534
I :'
M.,t_-01'1&) eev. 0 USER'S GUIDE TO PRESLOK Page 21 Program PRESLOK, Version 1 R.eJ_ tl
- Revision O December 22, 1995 This Mathcad Program is designed to calculate the estimated opening force under pressure locking scenarios for flex-wedge gate valves using a calculational methodology that accounts for wedge stiffness resisting pressure locking forces. This program was prepared by the Westinghouse Owner's Group based upon the calculational methods developed by Commonwealth Edison.
While this information is presented in good faith and believed to be accurate, the Westinghouse Owner's Group does not guarantee satisfactory results from reliance upon such information. Nothing contained herein is to be construed as a warranty, express or implied, regarding the performance, merchantability, fitness or any other matter with respect to the product, nor as a recommendation to use any product or process in conflict with any patent. The Westinghouse Owner's Group reserves the right, without notice, to alter or improve the methods described herein.
This section of the program reads the thirteen items of input data from the plinput1 .dat file.
i:=0 .. 12
- inputi := READ(plinputl) p bonnet:= inputo*psi P up := input 1*psi v := input8 E := input9 *psi p down:= inpu~*psi D stem := input1o*in t := input3*in F po := input 1t" lbf
- '=
VF := input12 b := input5*in Hub length:= input6*in e := inpu17*deg
- PRESLOK, Ver. 1, Rev. 0 12122/95 Westinghouse Owner's Group 1/2196 4:27:58 PM Page 1 o/5
fr1 L--o 1- Cj' ~ (2_ -ev. o USER'S GUIDE TO PRESLOK Page 22 Program PRESLOK, Version 1
~e..+. q
- INPUTS:
p bonnet= 1005 *psi Bonnet Pressure Upstream Pressure P
up = 380*psi Downstream Pressure P down =350 *psi t =2*in Disk Thickness*
(taken at centerline of the hub vertically) a =4.36 *in Seat Radius (corresponding to mean seat diameter) b = 1.25*in Hub Radius (taken at plane of symmetry, perpendicular to the hub, radius of circle of equivalent area for non-circular hubs) 8 =5*deg Seat Angle Poisson's Ratio (disk material at temperature) V =0.3
- Modulus of Elasticity (disk material at temperature)
Static Pullout Force (measured value from diagnostic test) 7 E = 2.76* 10 *psi F po = 15409 *lbf VF =0.52 Close Valve Factor D stem= 1.875 *in Stem Diameter Hub length = 0.5 *in Hub Length (from inside face of disk to inside face of disk)
- PRESLOK, Ver. 1, Rev. 0 12122195 Westinghouse Owner's Group 112196 4:28:44 PM Page 2 of 5
I .' \
USER'S GUIDE TO PRESLOK Program PRESLOK, Version 1
- PRESSURE FORCE CALCULATIONS Coefficient of friction between disk and seat:
µ:=VF* cos(0) 1 + VF*sin(0)
µ =0.496 Average DP across disks:
P up+P down DPavg =640 *psi DPavg := p bonnet - - ~ - - -
2 Disk Stiffness Constants 7
D := E*(t}3 D =2.022*10 *lbf*in 2
12-(1 - v )
7 E G = 1.062*10 *psi G:=---
2*(1 + V)
Geometry Factors:
C2 1-(!t(1+ 2-ln~)) l C 2 =0.1781
- = :.[
C3:= 4~J((:r +1}1n(~)+~)2-1] C 3 =0.0311 C 8 =0.6788 Cg =0.2789 Lg =0
- PRESLOK, Ver. l, Rev. 0 12/22195 Westinghouse Owner's Group 112196 4:29 :24 PM Page 3 of 5
I I I .. ~ ,
- f'\ 'f.._ -<9 4l '{ f_.e (/ .- 0
( Q.~+. q USER'S GUIDE TO PRESLOK Page 24 Program PRESLOK, Version 1
- Geometry Factors: (continued)
L11 := :A 1+4(:r- s-(:r- 4-(~t[ 2 (~r}1n(:)l + L l l =0.0069 L l? := :*[ 1 - l ~ v-[ l - (~rl- (~t[ 1 + ( 1 + V)* ln (:) )) L l7 =0.1526 Moment 2
-DPavg*a [ C 9 ( 2 2) ]
M rb := * - -
- a - b - L 17 M rb =-5265 *lbf Cg 2*a*b
,_ DPavg ( 2 b2) lbf Q b .- . a - Q b = 4466.5 *-.
2*b In Deflection due to pressure and bending:*
2 3 4 a a DPavg*a -4 YbcJ. := Mrb*o*C 2 + Q b"o*C 3 - D *L 11 y bcJ. =-3.9041
- 10 *in
- Deflection due to pressure and shear stress:
Ksa =-0.4743 2
K sa*DPavg*a -4 y sq:= y sq =-2.7177*10 *in t*G Deflection due to hub stretch:
( 2
- 2)
P force.:= 7t* a - b *DPavg p force Hub length Ystretch:= 2 * ( 2*E) -s 7t*b ,Ystretch =6.4731*10 *in Total Deflection due to pressure forces:
-4 Yq := Ybq_ + Ysq - Ystretch y q =-7.2691
- 10 *in
- PRESLOK, Ver. I, 8ev. 0 12122195 Westinghouse Owner's Group 112/96 4:30:05 PM Page 4 o/5
- .. j1.£-o417 /f--cv;o f\e:f-.. 'I USER'S GUIDE TO PRESLOK Page 25 Program PRESLOK; Version 1
- Deflection due to seat contact force and shear stress (per lbf/in.):
. *= -[ 1.2-(~)* m(~)**] y SW =-3.079* 10
-7 in Ysw
- t*G
"(::)
Deflection due to seat contact force and bending (per lbf/in.):
9 Ybw :=-(~)-[ (~;)-[ (**~ )- L9]-[ (:)*C 3 + L3 l l Ybw =-6.012*10
-7
(:)
in Deflection due to hub compression:
- = -(2*1t*a. Hub length) -8 in y cmpr = -5.055* 10 Ycmpr*
7t*b 2 2*E
.(1:)
Total deflection due to seat contact force (per lbf/in.):
-7 in Yw := Ybw + Ysw + Ycmpr y w =-9.597* 10
'(~)
- Seat Contact Force for which deflection is equal to previously calculated deflection from pressure forces:
F := 2*1t*a*-
s Yq Yw F s = 20750.5 *lbf UNSEATING FORCES Fpacking is included in measured static pullout Force
. 1t 2 F piston:= *D stem *P bonnet F piston =2775*lbf 4
2 F vert := 1t*a *sin(8)*(2*P bonnet-pup - p down) F vert = 6662.4 *lbf F preslock := 2*F s*(µ*cos(8) - sin(8)) F preslock = 16871 *lbf F total := - F piston + F vert + F preslock + F po p.P-"",t' tf*>S::.,
F total = 36167 .4 *lbf ""ff!;
PRESLOK, Ver. I, Rev. 0 12122195 Westinghouse Owner's Group 112196 4:30:57 PM Page 5 o/5
r tt11=- -o -1' ~ e!ev,, 6 R..e+. q USER'S GUIDE FOR PRESLOK Page 26 EXAMPLE OF AN ANALYSIS PERFORMED WITH PRESLOK, VERSION 2 The following is an image of the input file plinput2.dat used to run an example problem on version 2 of the PRESLOK analysis program:
1005 380 350 2 4.36 1.25 0.5 5 0.3 27.6E6 1.875 15409 0.496 The input file corresponds to input values as shown:
Bonnet Pressure: Pbonnet = 1005 psi Upstream Pressure: P0 P = 380 psi Downstream Pressure: Pdown = 350 psi Disk Thickness: t = 2.00 inches Seat Radius: a = 4.36 inches Hub Radius: b = 1.25 inches
=0.50 inches Hub Length: L Seat Angle: 8 = 5 degrees Poisson's Ratio: V = 0.3 (dimensionless)
Modulus of Elasticity: E = 27,600,000 psi Stem Diameter: Dstem = 1.875 inches Static Pullout Force: Fpo = 15,409 pounds Seat to Disk Coefficient of Friction: p = 0.496 (dimensionless)
The next five pages contain the output of the PRESLOK program, Version 2, using the above input
- plsh1213.wpf 0102961534
USER 1S GUIDE FOR PRESLOCK
- Program PRESLOK, Version 2 Revision O December 22, 1995 This Mathcad Program is designed to calculate the estimated opening force under pressure locking scenarios for flex-wedge gate valves using a calculational methodology that accounts for wedge stiffness resisting pressure locking forces. This program was prepared by the Westinghouse Owner's Group based upon the calculational methods developed by Commonwealth Edison.
While this information is presented in good faith and believed to be accurate, the Westinghouse Owner's Group does not guarantee satisfactory results from reliance upon such information. Nothing contained herein is to be construed as a warranty, express or implied, regarding the performance, merchantability, fitness or any other matter with respect to the product, nor as a recommendation to use any product or process in conflict with any patent. The Westinghouse Owner's Group reserves the right, without notice, to alter or improve the methods described herein.
This section of the program reads the thirteen items of input data from the plinput2.dat file.
- i:=0 .. 12 inputi := READ(plinput2)
P bonnet:= inputo*psi v := input8 Pup := input1*psi E := input9 *psi p down := inpu12 *psi D stem:= input 10,in t := input3* in F po:= input 1clbf
µ := input12 b := input5*in Hub length:= input6*in 0 := inpu17*deg PRESLOK, Ver. 2, Rev. 0 12122195 Westinghouse Owner's Group 112196 4:35:50 PM Page 1 o/5
Mt= -049 if; lev..- a USER'S GUIDE FOR PRESLOCK Page 28
-Program PRESLOK, Version 2 R...e..f.. ~
INPUTS:
Bonnet Pressure p bonnet= 1005 *psi Upstream Pressure P up =380*psi Downstream Pressure P down =350*psi Disk Thickness t = 2 *in (taken at centerline of the hub vertically)
Seat Radius a =4.36 *in (corresponding to mean seat diameter)
Hub Radius (taken at plane of symmetry, b = l.25*in perpendicular to the hub, radius of circle of equivalent area for non-circular hubs)
Seat Angle 8 =S*deg Poisson's Ratio (disk material at temperature) V =0.3 7
Modulus of Elasticity (disk material at temperature) E = 2.76* 10 *psi Static Pullout Force F po= 15409*lbf (measured valu~ from diagnostic test)
Coefficient of Friction between disk and seat: µ =0.496 Stem Diameter D stem =1.875 *in Hub Length Hub length = 0.5 *in (from inside face of disk to inside face of disk)
- PRESLOK, Ver. 2, Rev. 0 12/22/95 Westinghouse Owner's Group I 12/96 4:36:20 PM Page 2 of 5
'I 1,
M E--04-C? ;; ,Le-v. 0 USER'S GUIDE FOR PRESLOCK Page 29 Program PRESLOK, Version 2 R.e.J.. q
- PRESSURE FORCE CALCULATIONS Average DP across disks:
DPavg := p bonnet -
pup+ p down DPavg = 640 *psi 2
Disk Stiffness Constants 7
E*(t}3 D = 2.022* 10 *lbf*in D .-
2 12-(1 - v )
7 E G = 1.062* 10 *psi G .-
2*(1+v)
Geometry Factors:
C2:= :-( 1- (:t( I+ 2*ln(~))) C 2 =0.1781 C3:= 4\-(( (:f +,)-1n~) +(;f - I) C 3 =0.0311
- C8:=:-(I+ +(I -V)*(;r)
V C 8 =0.6788 Cg:=-;*
b l () l (r))
l+V 2*ln b a 1-V
+ 4
- 1--;
- b Cg =0.2789 L3:= :Jl(f+ ,)-1n(~) +(~f- ,) L3 =0 Lg:=-;* l -In;() l (f))
a l+v 2
a
+4 1-v a
- 1- ;
Lg=O
- PRESLOK, Ver. 2, Rev. 0 12122/95 Westinghouse Owner's Group 1/2196 4:37:05 PM Page 3 of 5
.* t I
/n£ -CJ4't;?.
/
f?..e,, _o USER'S GUIDE FO~ PRESLOCK Page 30 Program PRESLOK, Version 2 R...-h 'i
- Geometry Factors: (continued)
L11 6~{ 1+ 4-(~;}2 -s-(;;)'- 4*(t[ 2+ (;r}m(;)]
-DPavg*a2 [ C 9 (
C8
- --* a - b 2*a*b 2 2) - L 17 l M rb =-5265 *lbf
- - DPavg . ( a2 - b2) lbf Q b .- Q b = 4466.5 *-.
2*b m Deflection due to pressure and bending:
2 3 4 a a DPavg*a -4 Ybq := Mrb*o*C 2 + Q b*o*C 3-. D *L 11 Ybq =-3.9041*10 *in
- Deflection due to pressure and shear stress:
K sa =-0.4743 2
K sa*DPavg*a -4 y sq:= y sq =-2.7177*10 *in t*G Deflection due to hub stretch:
P force :=
2
- 2) 7t* ( a - b
- DPavg p force Hub length Ystretch :~ 2 * ( 2
- E) -s 7t*b y stretch = 6.4731_
- 10. *in Total Deflection due to pressure forces:
-4 Yq := Ybq + Ysq - Ystretch y q =-7.2691
- 10 *in
- PRESLOK, Ver. 2, Rev. 0 12122195 Westinghouse Owner's Group 112196 4:37:44 PM Page 4 of 5
Mt--01'?~ ~e-v,o R.e!:. 9 USER'S GUIDE FOR PRESLOCK Page 31
-Program PRESLOK, Version 2
- Deflection due to seat contact force and shear stress (per lbf/in.):
- = -[ 1.2-(;}-m(~}*] y SW =-3.079* 10
-7
- --in Ysw
- t*G
(]:)
Deflection due to seat contact force and bending (per lbf/in.):
9 Ybw :=-(~)-[ (::)-[ (**~ )- L9]-[ (~)-c 3] +L3 l y bw =-6.012*10
-7
- --10
(:)
Deflection due to hub compression:
- = -(2*1t*a. Hub length) -8 in y cmpr = -5.055* 10 *--
y cmpr
. 1t*b 2 . 2*E
(]:)
Total deflection due to seat contact force (per lbf/in.):
-7 in Y w := Y bw + Y sw + Y cmpr y w =-9.597* 10
'(:)
- Seat Contact Force for which deflection is equal to previously calculated deflection from pressure forces:
y F s := 2*1t*a*___i F s = 20750.5 *lbf Yw UNSEATING FORCES Fpacking is included in measured static pullout Force 1t 2 F piston :=
- D stem
- P bonnet F piston= 2775 *lbf 4
F vert := 1t*a2 *sm(8)*
- (2
- P bonnet - pup - p down. ) F vert = 6662.4 *lbf F preslock := 2*F s*(µ*cos(8) - sin(8)) F preslock = 16889.1 *lbf F total := - F piston + F vert + F preslock + F po F po= 15409*lbf F total =36185.5 *lbf PRESLOK, Ver. 2, Rev. 0 12122/95 Westinghouse Owner's Group 112196 4:38:21 PM Page 5 of5
. ~ ~
/111;...-64'1 &' ee-v. o R.e!..1 l:JSER'S GUIDE FOR PRESLOK Page 32
- REFERENCES
- 1. Bunte, Brian, "ComEd Pressure Locking Methodology and Test Program,"
presented at the NRC Region 3 Workshop on Pressure Locking and Thermal Binding, November 7, 1995.
- 2. Roark, Raymond J., and Young, Warren C., Formulas for Stress and Strain, Fifth Edition, McGraw-Hill Book Company, 1975.
- 3. Liberal use has also been made of a draft of a report being prepared by Mr. Brian Bunte of Commonwealth Edison Company, tentatively titled "Pressure Locking {Thermal Binding Report."
- plsh1213.wpf 0102961534
fVl.£-o#~ (t.e v,. o R.e~ 9
- Page 1 USER'S GUIDE FOR STEMGROW, A GATE VALVE THERMAL BINDING ANALYSIS PROGRAM USING THE COMMONWEALTH EDISON MODEL REVISION 0 December 29, 1995 While this information is presented in good faith and believed to be accurate, the Westinghouse Owner's Group does not guarantee satisfactory results from reliance upon such information.
Nothing contained herein is to be construed as a warranty, express or implied, regarding the performance, merchantability, fitness or any other matter with respect to the product, nor as a
- recommendation to use any product or process in conflict with any patent. The Westinghouse Owner's Group reserves the right, without notice, to alter or improve the methods described herein .
- stmgrw29.wpf 0216960852
f'I\E:.- o4? 0 R.-ev, a R.e....-k. q Page 2
- USER'S GUIDE FOR STEMGROW GATE VALVE THERMAL BINDING ANALYSIS PROGRAM USING THE COMMONWEALTH EDISON MODEL RECORD OF REVISION PAGE Rev. 0 Original Issue December 29, 1995
- stmgrw29.wpf 0216960852
M. E-a 1Cf 8 f2.e.v- o
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- USER'S GUIDE FOR STEMGROW GATE VALVE THERMAL BINDING ANALYSIS PROGRAM USING THE COMMONWEALTH EDISON MODEL TABLE OF CONTENTS SECTION PAGE NO.
TITLE PAGE 1 REVISION
SUMMARY
2 TABLE OF CONTENTS 3 INTRODUCTION 4 HARDWARE/SOFTWARE REQUIREMENTS 5 GETTING STARTED 6
- RUNNING THE STEMGROW ANALYSIS 7 INPUT PREPARATION 8 THEORY 9 EXAMPLE USING STEMGROW 13 stmgrw29.wpf 0216960852
M ~ -o4'1? /l.ev. o
/e.e..-tq USER'S GUIDE FOR STEMGROW Page 4 INTRODUCTION Thermal binding is a phenomenon which can cause the unseating thrust for a gate valve to increase, sometimes dramatically, from its typical static unseating thrust.
This can possibly result in the valve failing to open due to the actuator having insufficient thrust capability. Thermal binding can also result in valve damage in cases where the actuator thrust capability exceeds the valve structural capacity. For these reasons, a proper understanding of the conditions which may cause thermal binding, as well as a methodology for predicting the increase in unseating thrust for a thermally bound valve, are necessary. The analysis technique described herein allows the calculation of the increased unseating load for a valve undergoing one type of thermal binding, that due to thermal growth of the valve stem.
A method of analyzing gate valves to predict the increased unseating thrust for a valve which is experiencing thermal binding due to thermal growth of the stem has been developed by Commonwealth Edison, and has been obtained from Mr. Brian Bunte.
The Westinghouse Owner's Group, in the Pressure Locking/Thermal Binding Task Team meeting on November 13 and 14 , 1995, authorized the preparation of a MATHCAD program and accompanying user's manual to allow the uniform use of the Commonwealth Edison thermal binding analysis methodology. This manual is the result of that authorization .
- This manual and the program file for performing the analysis are available from the Westinghouse Owner's Group and may be obtained by contacting L. I. Ezekoye at (412) 374-6643 or W. E. Moore at (412) 374-6351. Please indicate whether the program is to be supplied on 3.5 inch diskettes or 5.25 inch diskettes .
- stmgrw29.wpf 0216960852
M £-o4f ~ eer/. o Q..e_+. q USER'S GUIDE FOR STEMGROW Page 5 HARDWARE/SOFTWARE REQUIREMENTS The program has been written using the MATHCAD 5.0 for Windows program.
This program is available from MathSoft, Inc.
101 Main Street Cambridge, MA 02142 1-800-628-4223 or 617-577-1017 Fax: 617-577-8829 The program is also widely available from software vendors.
The following hardware and software requirements for running the MATHCAD 5.0 for Windows program are extracted from the User's Guide which is supplied with the MATHCAD program:
- An 80386 or higher IB~ or compatible computer. A math coprocessor is not required, but its presence will significantly improve performance.
- Microsoft Windowsni Version 3 .1 or later or Windows NT .
At least 4MB of RAM. All memory above 640K should be configured as extended memory.
At least 14MB of free hard disk space for MATHCAD files.
- An additional lMB on the hard disk where MATHCAD is installed.
- At least 8MB of virtual memory. See the Windows user manual for how to specify virtual memory.
- A monitor and graphics card compatible with Windows.
- A mouse supported by Windows.
- Any printer supported by Windows.
The User's Guide supplied with the MATHCAD program should be followed for installation of the MATHCAD program onto your computer. The scope of this manual is to explain the usage of the STEMGROW analysis using the MATHCAD program .
- stmgrw29.wpf 0216960852
MJ;: -011; fev. o le.+: q USER'S GUIDE FOR STEMGROW Page 6 GETTING STARTED The STEMGROW files are supplied to you on either a 3.5 inch or a 5.25 inch diskette, per your request. It is recommended that the first step to use the files is to copy a "working version" of the files to your hard disk so that the diskette can be retained as a record copy. The files which are included are as follows:
stemgrow .med MATHCAD program for calculating the unseating thrust required for a valve undergoing thermal binding due to stem thernial growth..
sginput.dat ASCil file of input data required by the STEMGROW program.
The next step to use the program is to create a data file to transfer the input values for the variables to the STEMGROW analysis program. The STEMGROW program is* expecting these variables to appear in text file in plain ASCII format with the name "sginput.dat". The various numbers in the "sginput.dat" file can be separated by spaces, commas, or carriage returns, and may appear as integers, floating point numbers, or as E-format numbers such as 2.35E-2. An ASCII text file can be created using the Windows utility Notepad, or by numerous other methods. This file
- should be located in the same directory as the STEMGROW file, since when the STEMGROW file is loaded, that directory will become the MATHCAD default directory. The user is also referred to the chapter on "Data Files" in the MATHCAD User's Guide if further explanation of the use of the 11 .dat" file is needed.
Sample data files are included in the program diskette which can be used simply by changing the input values to the proper values for your analysis. Alternately, other file names can be used for the input data by changing the input file name on the page 1 of the STEMGROW program to the file name desired .
- stmgrw29.wpf 0216960852
hJ £ -Ofttf7. e.e.v_ o
'.,J e....e.. I_ 9 USER'S GUIDE FOR STEMGROW Page 7 RUNNING THE STEMGROW ANALYSIS At this point it is assumed that the user has the MATHCAD 5.0 program loaded onto his computer, and that the STEMGROW file and the "sginput.dat" file are available to the computer in the same directory. To run the STEMGROW analysis, the user should perform the following steps:
- 1. Double click on the MATHCAD 5.0 icon to start the MATHCAD program.
- 2. Go to the File pulldown menu and click on Open (or click on the Open File icon on the Tool Bar.)
- 3. In the Open dialogue box, select the directory containing the stemgrow.mcd file and select the stemgrow. med file. Then click on OK.
- 4. The STEMGROW program will pick up the input values from the sginput.dat file and perform the analysis if the program is in the automatic mode (Automatic Mode has a check mark next to it in the Math pulldown menu.) If the MATHCAD program is not in the automatic mode, it can be forced to perform the calculation by clicking on the Calculate Document function in the Math pulldown menu. Results may be inspected by using the scroll bar on the
- 5.
right hand side of the display to scroll through the display as desired .
To change the inputs, open the Windows utility Notepad and open the sginput.dat file. Make the desired changes to the file and then save it. To have MATHCAD re-perform the analysis with the new input values, open the Math pulldown menu and click on Calculate Document. This alternate use of Notepad and the MATHCAD function Calculate Document should be repeated until the analysis is correct.
6 The output may be printed using the Print command in the pulldown menu under File or using the print icon in the Tool Bar. The user is referred to the MATHCAD User's Guide if any changes are desired to the Page Setup or the Printer Setup.
Note that valve identifiers or other identifying titles may be added to the output by using the MATHCAD text entry methods given in the MATHCAD User's Guide. If the user desires to add the identifier/title to each page, the use of a header is recommended. The header can be defined through the Headers/Footers command in the Edit pulldown menu or through the Header command in the Page Setup dialogue box. See the Documents and Windows section of the MATHCAD User's Guide for further information about Headers .
- stmgrw29.wpf 0216960852
USER'S GUIDE FOR STEMGROW Page 8
- 7. The program may be exited using "Exit" in the File pulldown menu.
- stmgrw29.wpf 0216960852
USER'S GUIDE FOR STEMGROW INPUT PREPARATION The following inputs are required for the use of the STEMGROW analysis program:
- Change in temperature to which the portion of the valve stem being inserted into the valve body/bonnet is subject.
Change in Temperature: DeltaTemp op
- Valve/Actuator Parameters. These includes the amount of stem travel in going from open to closed, the stem thread lead in inches, the actuator motor speed and the actuator overall gear ratio.
Stem Travel: Travel inches Stem Thread Lead: Lead inches Actuator Motor Speed: MotorSpeed RPM Actuator Overall Gear Ratio: OAR dimensionless
- Valve Stem Material Properties. The only material property required is the coefficient of linear thermal expansion for the stem material, for the temperature range being considered.
Coefficient of Thermal Expansion: TempCoef inches/inch/ °F
- Measured forces and times from testing of the subject valve. A sample of a typical thrust versus time curve is given in Figure 1, which illustrates most of
('*,,._
\_
the required values. These include the following:
Maximum Static Closing Thrust: Maxc1ose pounds (VOTES Event Number Cl6)
Maximum Static Unseating Thrust: Maxopen pounds (VOTES Event Number 09)
Thrust at Control Switch Trip: CSTthrust pounds (VOTES Event Number Cl4)
Time at Control Switch Trip: CSTwne seconds (VOTES Event Number Cl4)
Thrust at Seating: Sea~rust pounds (VOTES Event Number Cll)
- stmgrw29.wpf Time at Seating:
0216960852 Seatwne seconds
NI£ -fP49
,,,_ gI £..e.v. 0 R.e.+- q .
Page 10
- (VOTES Event Number Cll)
- stmgrw29.wpf 0216960852
/Y1E..-o #~ ltev. o Re...C.. 1 USER'S GUIDE FOR STEMGROW Page 11 Typical Thrust Trace Control ~ltc:11 Trip
..,./
t U axl mum Thru c:t
- THEORY ASSUMPTIONS FIGURE 1
- 1. This analysis assumes that the stiffness of the entire valve and actuator assembly can be found from measurements taken during the testing of the valve. Specifically, the stiffness of the entire assembly is calculated from the difference in thrusts at seating and at control switch trip divided by the inches of stem travel between seating and control switch trip. The inches of travel between seating and control switch trip are calculated from the time between these events and the stem travel speed, which is found from the motor speed, the overall gear ratio of the actuator, and the lead of the stem threads.
- 2. Inherent in the first assumption is the assumption that the motor speed remains at a known, constant value for the period between seating and control switch trip, and that this constant travel speed results in a constant rate of increase in thrust as the stem moves.
- 3. The only portion of the stem which undergoes significant thermal growth is the portion which is moved inside the body or bonnet of the valve in moving from the open to closed position, i.e., a*length of the stem equal to the stem travel.
stmgrw29.wpf 0216960852
jV1£-t}9f~~- 0
~-+-- i USER'S GUIDE FOR STEMGROW Page 12 DESIGN INPUTS The following design inputs are used in calculating the force required to unseat an MOV subject to thermal binding due to stem thermal growth:
- Change in temperature to which the portion of the valve stem being inserted into the valve body/bonnet is subject.
Change in Temperature: DeltaTemp °F
- Valve/Actuator Parameters. These includes the amount of stem travel in going from open to closed, the stem thread lead in inches, the actuator motor speed and the actuator overall gear ratio.
Stem Travel: Travel inches Stem Thread Lead: Lead inches Actuator Motor Speed: MotorSpeed RPM Actuator Overall Gear Ratio: OAR dimensionless
- Valve Stem Material Properties. The only material property required is the coefficient of linear thermal expansion for the stem material, for the temperature range being considered.
Coefficient of Thermal Expansion: TempCoef inches/inch/°F
- Measured forces and times from testing of the subject valve. A sample of a typical thrust versus time curve is given in Figure 1, which illustrates most of the required values. These include the following:
Maximum Static Closing Thrust: Maxc1ose pounds (VOTES Event Number Cl6)
Maximum Static Unseating Thrust: Maxopen pounds (VOTES Event Number 09)
Thrust at Control Switch Trip: CSTthrust pounds (VOTES Event Number Cl4)
Time at Control Switch Trip: CSTtime seconds (VOTES Event Number Cl4)
Thrust at Seating: Sea~rust pounds (VOTES Event Number Cll) stmgrw29.wpf 0216960852
/YI£-o 4 9'3 ;et!. v. cl lL~+- lf USER'S GUIDE FOR STEMGROW Page 13 Time at Seating: Seat.u.re seconds (VOTES Event Number Cll)
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~e..f. 1' USER'S GUIDE FOR STEMGROW Page 14 CALCULATIONS The methodology for calculating the thrust required to open an MOV subject to thermal binding due to stem growth is based upon calculating the increase in seating thrust due to thermal elongation of the stem. This is done by calculating the free thermal growth of the stem, and then using the stiffness of the valve/actuator assembly to convert the change in length to a change in seating thrust. The unseating thrust under the thermal binding load is then calculated by multiplying the thermally bound seating thrust by the ratio of the normal unseating thrust to the normal seating thrust. The calculations are done using the design inputs as follows:
Valve/ Actuator Assembly Stiffness Under Thrust Loading The stem is assumed to move at a constant rate of speed with a constant rate of increase in thrust during the period between seating and control switch trip during valve testing. The motor speed during this period is assumed to be known. Then, the stem speed can be calculated from 1 minute Lead Stem Speed = Motor Speed * * --
60 seconds OAR The motor speed is assumed to be given in revolutions per minute .
The rate of load increase is calculated directly from the measured values of thrust and time.
CSTthrust - Seatthrusl Load Rate = - - - - - - -
CSTtime - Seat,;-
The stiffness of the valve/actuator assembly under thrust loading is then obtained from Load Rate Stiffness = ----
Stem Speed Ratio of Unseating Force to Seating Force The ratio of unseating force to seating force is assumed to be the same for the thermally bound condition as it is for normal valve operation. Using values from an opening test performed following a closing test at operating conditions, this ratio is simply
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/J/1£-019 ~ IZ~v. 0 e.e..-+- Cf USER'S GUIDE FOR STEMGROW Page 15 Maxo,,en Unseating Ratio = --=--
Maxclose Stem Elongation due to Thermal Expansion The amount of stem elongation due to thermal expansion is calculated by the familiar L
- a* ~T equation.
Stem Elongation = Travel* DeltaTemp
- TempCoef Total Force Required to Overcome Thermal Binding due to Stem Growth The total thrust which is* holding the valve closed is now calculated as the sum of the thrust due to normal closing plus the additional thrust due to stem thermal growth.
Final Thrust = Maxc~ + Stem Elongation *Stiffness The final value for unseating thrust is just the ration of the normal unseating thrust to the normal closing thrust times the thermally bound closing thrust.
Final Unseating Thrust = Unseating Ratio *Final Thrust The acceptance criteria recommended for use in this calculation is that the available motor operator thrust capability be at least 120 % of that required to unseat the MOV under thermal binding conditions. The 20% margin is provided to allow for uncertainty in the measurements of used to calculate the stiffness and the unseating ration as well as other effects such as valve-to-valve and motor actuator-to-motor actuator variations. All of these effects are random in nature .
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f<..e...+. 9 USER'S GUIDE FOR STEMGROW Page 16 EXAMPLE OF AN ANALYSIS PERFORMED WITH STEMGROW The following is an image of the input file sginput.dat used to run an example problem the STEMGROW analysis program:
10 300 0.00001 15000 9000 12000 17.874 1000 16.994 3600 62.5 0.25 The input file corresponds to input values as shown:
Stem Travel: Travel 10 inches Change in Temperature: DeltaTemp 300 °P Coefficient of Thermal Expansion: TempCoef 0.00001 inches/inch/ 0 P Maximum Static Closing Thrust: Maxdose 15000 pounds Maximum Static Unseating Thrust: Maxopen 9000 pounds Thrust at Control Switch Trip: CSTthrust 12000 pounds
- Time at Control Switch Trip:
Thrust at Seating:
Time at Seating:
Actuator Motor Speed:
CSTtime Seat.iirust Seatau..e MotorSpeed
- 17. 874 seconds 1000 pounds 16.994 seconds 3600 RPM Actuator Overall Gear Ratio: OAR 62.5 (dimensionless)
Stem Thread Lead: Lead 0.25 inches The next three pages contain the output of the STEMGROW program, Revision 0, using the above input.
stmgrw29.wpf 0216960852