ML18010A831
| ML18010A831 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 10/08/1992 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML18010A832 | List: |
| References | |
| CS-0020, CS-0020-R02, CS-20, CS-20-R2, GL-89-10, NUDOCS 9210280053 | |
| Download: ML18010A831 (32) | |
Text
Carolina Power
& Light Company PO Box 1551
- Raleigh, North Carolina 27602 Shearon Harris Nuclear Power Plant Vnit 1 Mechanical Analysis and Calculations for 1CS-745 Charging Pump A to Refueling Water Storage Tank Isolation Valve IIIIm:I3IIII'INII'I~LII Generic Letter 89-10 Applicable:~Yes No Valve Classification:
Nuclear-Safety Related Calculation Number *CS-0020 Revision Prepared By/Date Verified By/Date Project Engineer/Date Signatures on file Signatures on file Prin. or Res.
Eng./Date Reason Incorporation of Electrical Calculation E5-001, Revgiion 1
Reason Reason See section 1.2 of %his calculation.
'7210280053 921009 PDR ADOCK 05000400 P
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2 Pacae 1
2 3
4 5
6 7
8 9
10 11 12 13 14 15 16 17 18 19 List of Effective Pa es Revision Attachment A
Attachment B
Attachment C
Attachment D
Attachment E
Attachment F
Attachment G
Telecon w/Velan Inc.
Fax from i of Velan Flow Isolation/Seating Thrust Average Closing Packing Load Final Thrust Due to Inertia Thrust at Torque Switch Trip Design Verification Record 1CS-745 Page No:
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2 TABLE OP CONTENTS Section 1.0 2.0 3.0 3 ~ 1 3.2 3 '
4.0 i
Purpose References Bases and Assumptions Analyzed Configuration Valve Function and Control Configuration Assumptions Calculations Pacae 4.1 4.2 4.3 Generic Letter 89-10 Applicability Design Differential Pressure Evaluation Valve Thrust 4.4 4.5 Recommended Minimum Torque Switch Setting 11 Motor Capacity Limits 5.0 4.6 4.7 4.8 4.9 Allowable Operating Ranges Stall Evaluation Required Limit Switch Settings Nominal Operating Time
- Results, Conclusions and Recommendations 12 14 15 17 19 Attachment A
Attachment B
Attachment C
Attachment D
Attachment E
Attachment F
Attachment G
Telecon w/Velan Inc.
Fax from of Velan Flow Isolation/Seating Thrust Average Closing Packing Load Final Thrust Due to Inertia Thrust at Torque Switch Trip Design Verification Record 1 page 3 pages 1 page 1 page 1 page 1 page 2 pages 1CS-745 Page No:
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2 1 ~ 0 PURPOSE 1.1 Pu ose oi this Re ort The purpose of this report is to document various parameters pertaining to the subject motor-operated valve.
This report:
reviews the design differential pressure against which the valve may have to oper'ate calculates the MOV thrust/torque requirements evaluates the limitations of the actuator,
- motor, and valve (evaluation includes effects of a motor stall) evaluates the actuator limit switch settings 1.2 Reason for Revision PCR-6547, Revision 1, removed the Alternate Mini-flowRelief Valves and installed restricting orifices upstream of motor-operated valves 1CS-745, 1CS-746, 1CS-752 and 1CS-753 The control logic for valves 1CS-746 and 1CS-752 will be modified such that they will automatically open upon high RCS pressure (2300 psig) coincident with an "S" signal and will automatically close at the reset pressure of 1750 psig.
Closure of the block valves (1CS-745 and 1CS-753) may be required if the automatic closure isolation valves (1CS-746 and 1CS-752) failed to reclose (reference 2.19).
The reason for this revision, is to evaluate the changes made by PCR-6547, Revision 1 and to establish that Generic Letter 89-10 is applicable to valve 1CS-745.
2 '
REFERENCES 2.1 2.2 2 ~ 3 NED Design Guide DG-I.11, "Q-List Motor-Operated Valve Mechanical Evaluations",
Revision 4.
NED Scope Document Q9-M0-002, Revision 2.
"Analysis of Overload Protection and Motor Torque Output for AC Motor Operated Valves" E5-001, Sub-Calculation CPL-MOV-052, Revision 2.
2.4 2.5 Control Wiring Diagram 2166-B-401 Sheet
- 318, Rev.
6.
Corrective Maintenance Procedure CM-I0002, Revision 4.
Valve Vendor Print - 1364-53850, Revision 1.
Technical Manual
- ZSP, Volume 2, Revision 18.
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2
2.0 REFERENCES
Continued 2.8 2.9
- 2. 10 2.11
- 2. 12
- 2. 13
- 2. 14 2.15 2'6 2'7 2.18 2'9 Chemical
& Volume Control Piping, Reactor Auxiliary Building, Plans, CAR-2165-G-140, Revision 23.
Chemical and Volume Control System Description, SD-107, Revision 2.
Crane Technical Paper No. 410, 19 Printing - 1980.
Technical Memorandum "Performance and Properties of Limitorque Components",
Number TM-G-XXXX-001, Rev.
0.
Piping Line List, CAR-1364-B-0070, Revision 44.
Westinghouse E-Spec.
No. G-678852, Revision 2.
Design Basis Document DBD-104, Revision 0.
RAB Tank Area Sections, CAR-2165-,G-251, Revision 18.
Piping Isometric 1-CS-651, Revision 5.
Limitorque Order Sheet 3D0652-D.
PCR-6547, Revision 1, "Alternate Mini-Flow Re-Design".
EOP User's Guide, Revision 2.
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BASES AND ASSUMPTIONS 3.1 Anal zed Confi ration The configuration assumed when performing this analysis is as follows:
Actuator Data Limitorque Order Number:
Actuator Size
& Type:
Overall Unit Ratio:
Handwheel Ratio:
Handwheel Efficiency:
Worm Set/Gear Ratio:
Worm Set Efficiency:
Applications Factor:
Installed Spring Pack:
Pullout Efficiency:
Run Efficiency:
Stall Efficiency:
3D0652-D SMB-00 82.0:1 4.3P:1
'5%
45:p 36%
0.9 60-600-0047-1 40%
50%
50%
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2 3.1 al sed Con i ration Co ti ed Foot-Pounds:
RPM:
Volts:
10 1700 460 AC Valve Data Manufacturer:
Valve Size
& Type:
Valve Pressure Class:
Mean Contact Seat Diameter:
Stem Configuration:
Stroke Length:
Velan 2-inch, globe 1500 psig 1.875 1.125D-1/3P-2/3L 1.5 inches 1 Walkdown. Data "Motor-Operated-Valve Data Form" 2 - NED Design Guide I.ll (Reference 2.1) 3 Limitorque Order Sheet (Reference 2.17) 4 Emdrac Print (Reference 2.7) 3.1.1
. Crass-reference Number s The Ebasco (construction identification) tag number for this valve is 2CS-V758SB-1.
The Westinghouse Identification Number and Location are 2TM78FNM and 8490B respectively.
3.2 Valve Function and Control Confi ration 3.2. 1 Valve Function The alternate mini-flow line is for dead head protection of the CSIP's during safety injection (specifically the injection phase of the SIS operation).
Valves 1CS-745 and 1CS-753 are normally open and are closed only if valves 1CS-746 and 1CS-752 fail to isolate.
These valves are located in parallel on the two alternate mini-flow lines which relieve to the RWST.
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2 3.2.2 Control Confi ration The following statements are derived from references 2.4, 2.5 and 2'8
'his MOV can only open if valves 1RH-25, 1RH-63 and 1CS-746 are closed.
This MOV trips out via the torque switch in the closing direction and is electrically de-energized by the open limit switch, in the opening direction.
The open torque switch and thermal overloads are automatically bypassed on loss of offsite power or a safety injection actuation.
1)
The minimum torque delivered by the actuator motor is assumed to be 5.9 ft-lbs per reference 2.3.
2)
The maximum torque delivered by the actuator motor is assumed to be 11.2 ft-lbs per reference 2.3.
3)
The Stem Factor for a coefficient of friction of 0.15 is 0.0156 and a coefficient of friction of 0.2 is 0.0179 (reference 2.1).
4)
The flow limiting component in the alternate mini-flow line is the fixed orifice.
The flow capacity of this orifice is 60 gpm nominally (reference 2.18).
5)
The maximum operating temperature and design temperature for line number 2CS2-785SN-1 is 130 F and 200 F respectively (reference 2.12).
6)
Piping frictional losses are ignored when calculating differential pressure at the valve.
7)
The 0.433 psig/ft conversion factor used in this calculation is based on water at 60 F (reference 2.10).
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CALCULATIONS 4.1 Generic Letter 89-10 A
licab lit Valve 1CS-745 is located in the CSIP alternate mini-flow line.
The alternate mini-flow line is for dead head protection of the CSIP's during safety injection (specifically the injection phase of the SIS operation).
This valve is normally open; however, if valve 1CS-746 were to fail to isolate this valve would be required to close.
Based on the preceding paragraph and the guidance provided in reference 2.2, the requirements of Generic Letter 89-10 are a
licable to this MOV.
4.2 Desi Differential Pressure Evaluation 4 ~ 2 ~ 1 S stem Inlet Pressure Upstream pressure will be assumed to be equal to the shutoff head of the CSIPs plus the static head of the RWST at its maximum level.
CS P s utoff head:
6200 feet (ref. 2.7)
- 0.433 psig/foot
= 2,684 psig Static Head:
RWST Maximum Level = 301 ft. (ref. 2.15)
Valve Elevation = 249 ft. (ref. 2.16)
(301 ft.
249 ft.)
- 0.433 psig/ft 23 si Upstream Pressure is equal to:
2, 707 psig 4.2.2 Differential Pressure The maximum differential pressure (dP) occurs when maximizing the upstream and minimizing the downstream pressure.-
To maximize dP,
~
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it is assumed that the downstream pressure is 0 psig.
Therefore, the maximum differential pressure is 2,707 psid.
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2 4.2.2 Differential Pressure Conti ued Note: The subject MOV is a pressure under the seat globe valve.
The most conservative opening differential pressure assumption is to assume 0 psid since any line pressure would assist the valve in opening.
For this reason opening upstream pressure and differential pressure are not calculated.
4.3 Valve Thrust 4.3.1 Valve Thrust Re ired at Maximum dP The maximum thrust requirements for the operation of this pressure under the seat globe valve may be determined by the following equations, which are provided by reference 2.1.
CLOSING THRUST = (dp
- A
- FV) + SBL + [SA*(P-dP)]
OPENING THRUST = SBL (dP
- A) - [SA*(P-dP)]
where:
THRUST =
The required stem thrust, in'ounds-force.
dp
=
The differential pressure across the valve.
The seat area of the valve, which is 2.76 square inches based on contact seat diameter (Section 3 ~ 1).
An empirical valve factor, which is 1.1 per reference 2.1.
SBL
=
The stuffing box load, or packing drag, expressed in pounds-force.
This is 1500 pounds per reference 2.1.
SA The area of the stem, in square inches.
For the stem diameter given in section 3.1, this area is 0.99 square inches.
The inlet system pressure.
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2 4.3 ~ 1 Valve Thrust Re ired at Maximum dP cont.
From the information given above, the closing thrust may be calculated.
CLOSING THRUST (2 i 707*2 ~ 76*1 ~ 1)
+ 1 g 500 +
t'0 ~ 99*(2 i707 2 I 707]
8i218 + li500 +
0
= 9,718 pounds The value of 9,718 pounds includes a conservatism of approximately 10% due to the assumed valve factor of 1.1, and an additional conservatism of approximately 500 to 1,000 pounds due to the assumed packing load of 1,500 pounds (see attachment D).
In addition, normal CP&L practice is to multiply the calculated closing thrust by 1.15 in order to account for possible VOTES measurement errors and torque switch repeatability.
Thus, the theoretical calculated closing thrust is 11,176 pounds.
NOTE:
Liberty Technologies issued a 10CFR21 notification on 10/2/92 which documents potential thrust measurement inaccuracies due to torsional effects on small stems.
A review of the design of 1CS-745 has confirmed that the anti-rotation device is.located in the yoke
- flange, above that portion of the stem where the VOTES calibrator was installed.
Thus, the subject 10CFR21 notification does not apply to this valve.
The calculated minimum allowable closing thrust of 11,176 pounds is within the thrust capabilities and ratings of the valve and
- actuator, which are 14,432 and 14,000 pounds, respectively.
However, there is a concern that inertial effects may cause the final thrust to exceed the continuous ratings of the actuator and valve.
A review of differential pressure test data for 1CS-752 (a sister valve), which was tested at approximately 2,730 psid, indicates that thrust at torque switch trip was 11,131 pounds (attachment F).
Final seating thrust due to inertia was 13,432 pounds (attachment E), which represents a thrust increase of 21%.
Since the assumed VOTES measurement error is 210%, the actual final thrust may exceed the continuous thrust ratings of the actuator and valve.
Thus, it is desirable, if possible, to adjust the torque switch to trip at a lower value of thrust.
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2 4.3.1 Valve Thrust Re ired at Maximum dP cont Test data for 1CS-752 indicates that flow isolation was achieved at 7,804 pounds (attachment C) of thrust at an indicated test dP of 2730 psid.
This test was performed with a spool piece installed in lieu of the relief valve.
The proposed configuration of multiple orifices installed.upstream of the MOVs will reduce upstream pressure at the valve, thereby making the results of this previous test conservative.
The average closing packing load during the RF03 test of 1CS-752 was 456 pounds (attachment D).
This packing load is included in the 7,804 pounds of thrust at flow isolation; therefore, the thrust required to overcome differential pressure is equal to 7,348 pounds.
In order to allow for variations in packing, a packing load of 1500 pounds will be assumed.
From the information given above, the expected closing thrust may be calculated.
CLOSING THRUST = 7,348
+ 1,500
+ [0.99*(2,707-2,707]
7i348 + li500 + 0
= 8,848 pounds A differential pressure and line pressure of zero is assumed to provide for the most conservative opening thrust.
OPENING THRUST = 1,500 (0*2.76)
[0.99*(0-0)]
1,500 0 0
= 1,500 pounds 4.3.2 Minimum Allowed Dia ostic Th st The minimum allowable closing/opening thrust at torque switch trip shall be 1.15 times the calculated required thrust when actuator torque is > 50 foot-pounds and 1.20 when actuator torque is ( 50 foot-pounds, in order to account for possible measurement errors and torque switch repeatability.
- Thus, MINIMUM CLOSING DIAGNOSTIC THRUST
=
REQUIRED THRUST
- 1.15 8,848
- 1 ~ 15 10,175 pounds 1CS-745 Page No:
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Minimum Allowed Dia ostic Thrust Continued MINIMUM OPENING DIAGNOSTIC THRUST
=
REQUIRED THRUST
- 1.20 1,500
- 1.20 1,800 pounds 4.4 Recommended Minimum Tor e Switch Settin s
The input torque (actuator torque) required to produce the thrust values calculated in section 4.3, may be calculated using the following equation (reference 2.1).
ACTUATOR TORQUE
=
THRUST
- STEM FACTOR Based on the stem factors given in section 3.3, Assumption 3, the actuator torque for the normal opening and closing conditions may be calculated as follows:
MINIMUM CLOSING TORQUE = 10,175
- 0.0179
= 182 ft-lbs MINIMUM OPENING TORQUE = 1,800
- 0.0179 32 ft-lbs 4.5 Motor Ca acit Limits The available motor torque at degraded-voltage conditions limits the available actuator torque. If a torque switch is set above the minimum available torque, there is a possibility of stalling the motor before the torque switch can actuate.
In order to prevent this situation, the maximum torque switch setting value shall not exceed the minimum available torque provided by the motor at degraded-voltage conditions.
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2 4 ~ 5 ~ 1 losin Actuator To e as ted b oto C
a t According to reference 2.1, the closing actuator torque that will be developed by the minimum available motor torque (reference 2.3) is calculated as follows.
ACTUATOR TORQUE = MOTOR TORQUE
- UNIT RATIO
- RUNNING EFF.
- 0.9 5.9 82.0 0.50 0.9 218 foot-pounds 4.5.2 0 enin Actuator Tor e as Limited b Motor Ca acit According to reference 2.1, the opening actuator torque that will be developed by the minimum available motor torque (reference 2.3) is calculated by:
ACTUATOR TORQUE = MOTOR TORQUE
- UNIT RATIO
- PULLOUT EFF.
- APPLICATION FACTOR 5.9
- 82.0
- 0.4
- 0.9 174 foot-pounds 4.6 Allowable 0 eratin Ran es 4.6.1 Maximum Thrust and Tor e Limits Thrust Limits The allowable thrust limits of the actuator and valve are shown below.
The limiting components in the opening and closing directions define the maximum allowable continuous thrust setting.
COMPONENT ACTUATOR VALVE CLOSING VALVE OPENING LIMIT POUNDS
- 12 600
- 12 989
- 12 989 SOURCE REF. 2.1 Attachment B
Attachment B
This limit is 904 of the Limitorque qualified continuous rating.
These limits represent 904 of the Velan continuous duty ratings as provided in attachment B.
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2 4.6.1 Maximum Thrust and Tor e Limits Continued Tor e Limits The allowable torque limits of the actuator and valve are shown below.
The limiting component defines the maximum allowable continuous torque setting.
COMPONENT MOTOR CLOSING MOTOR OPENING ACTUATOR SPRINGSET PACK LIMIT FOOT-POUNDS 218 174
- 225 250 SOURCE SECTION 4.4 SECTION 4.4 REF.
2 '
REF. 2.11 This limit is 904 of the Limitorque qualified continuous rating.
4.6 '
E ivalent Wormshaft Tor e
From reference 2.1, the wormshaft torque that must be applied to achieve a required output torque may be calculated by:
WORMSHAFT TORQUE
=
RE UIRED OUTPUT TOR UE WS RATIO
- WS EFFICIENCY 4.6.2.1 Closin Normshaft Tor e
The equivalent wormshaft torque is provided for the purpose of verifying the closed torque switch setting with a torque wrench.
Q 11.23 FOOT-POUNDS 45 0.36 MAXIMUMWORMSHAFT TORQUE 135 INCH-POUNDS 218 45 0.36 162 INCH-POUNDS 13.46 FOOT-POUNDS 1CS-745 Page No:
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4.6.2.2 0 enin lformshait Tor e
For this valve the recommended minimum opening torque setting is 32 foot-pounds, and the maximum allowable open torque setting is 174 foot-pounds.
However, it is not practical to set the opening torque switch with a torque wrench because this would cause the stem to be forced against the backseat.
Therefore, the open torque switch shall be adjusted to a setting of "1" (Reference 2.11).
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Sta11 Evaluation According to electrical analysis (reference 2.3) performed for this valve, the maximum available motor torque at the most favorable conditions is 11.2 foot-pounds.
According to reference 2.1, the stall torque of the operator may be calculated by:
ACTUATOR STALL TORQUE MAXIMUMMOTOR TORQUE
- UNIT RATIO
- STALL EFFICIENCY 11.2
- 82.0 *.50
=
459 FOOT-POUNDS The corresponding stall thrust may be calculated as follows (reference 2.1):
Note:
The stem factor for a coefficient of friction of 0.15 is used for conservatism (see section 3.3).
STEM FACTOR 459 29,423 POUNDS 0.0156 The one-time limits of the valve and actuator are as follows:
COMPONENT ACTUATOR TORQUE ACTUATOR THRUST VALVE CLOSING VALVE OPENING LIMIT 500 FOOT-POUNDS 35 000 POUNDS 35 616 POUNDS 35,616 POUNDS SOURCE REF. 2.1 REF. 2.1 ATTACHMENT B ATTACHMENT B 1CS-745 Page No:
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2 4.7 Sta Evaluation Continue The calculated stall forces for this Motor Operated Valve (MOV) indicate that the potential does not exist for damage to the actuator and valve power train and load-bearing components.
4.8 Re ired Limit Switch Settin s
As shown in reference 2.4, the actuator is equipped with a four train limit switch assembly, arranged in the following manner:
4.8.1 Bases of Limit Switch Set oint Re irements
~Rator 1
Rotor gl acts as, the open limit switch, in order to stop the motor after the valve has traveled to the full open position. It provides position indication (it turns off the green indicator lamps when the valve is full open).
In addition, rotor g1 provides a bypass around the closing torque switch as the valve starts closed.
The practice at SHNPP has been to set the open limit switches to actuate when the disc is at 964 of full open position unless otherwise specified on the control wiring diagram (reference 2.5).
Operating experience has shown that this setting provides for proper flow rate,
- however, RF03 testing of a sister valve identified that the valve stem was coasting into the backseat.
- Thus, a setpoint of 964 may not be adequate and therefore, a
setpoint of 90% is recommended (see Attachment.
A for justification).
otor 2
When the valve is given a signal to close, the motor runs in the closing direction until the torque switch is actuated, which stops the motor.
Rotor 42 is wired to provide a bypass around the open torque switch until the valve is unwedged.
In addition, rotor N2 provides valve position indication (it turns off the red indicator lamps when the valve is fully closed).
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2 i.8.1 Bases of Limit Switch Set oint Re irements Cont.
In order to assure proper position indication in the close direction, the close limit switch should be adjusted to indicate a closed condition only after the disc has covered the valve seat.
The practice at SHNPP has been to set the close limit switches to actuate when the disc is at the 4% position unless otherwise specified on the control wiring diagram (reference 2.5).
Operating experience indicates that 4% from fully closed is adequate to meet the setpoint requirements for rotor N2.
- Thus, 4% is an acceptable
- setting, and can be retained.
Rotor 3
Rotor 43 provides position indication to the main termination board and should be set to trip at the same setpoint as rotor 41.
Therefore, a setpoint of 90% is recommended.
Rotor Rotor 44 provides a permissive which allows valve 1RH-63 to open provided valve 1CS-745 is closed and other conditions are met.
~
~
The practice at SHNPP has been to set the close lxmzt switches to actuate when the disc is at the 4% position unless otherwise specified on the control wiring diagram (reference 2.5).
Operating experience indicates that 4% from fully closed is adequate to meet the setpoint requirements for rotor g4.
- Thus, 4% is an acceptable
- setting, and can be retained.
4.8.2 Limit Switch Settin Re irements Limit Switch Rotor Settin s In this case, the various limit switch rotors are required to be set as follows:
ROTOR <<1:
ROTOR 42 ROTOR g3 ROTOR C4 90% of full open 4% of full open 90% of full open 4% of full open 1CS-745 Page No:
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2 i.8.2 Limit Switch Settin Re irements Continued The preferred method for setting limit switches is to determine the number of handwheel turns needed for a full stroke, and then to set the switches at the required percentages based upon that.
The total number of handwheel turns needed to stroke the valve may be determined if the stroke length, thread lead, and handwheel ratio are all known.
The total handwheel(HW) turns to fully stroke the valve is calculated as follows:
TURNS~
=
VALVE STROKE / THREAD LEAD
- HANDWHEEL RATIO 1.5 inches /.667 inches
- 4.38 9.85 handwheel turns 4% of 9.85 handwheel turns is equal to 3/8 handwheel turn.
10% of 9.85 handwheel turns is equal to 1 handwheel turn.
4.9 Nominal 0 eratin Time Nomi al o eratin time is rovided for informatio onl as actual motor RPMs can va with a lied load.
With the information provided in section 3.1, the stem nut revolutions per valve stroke and the stem nut revolutions per minute can be determined as follows:
/
LEAD 1.5
- 0. 667 2 25 STEM NUT REVOLUTIONS/MINUTE OTO P
OVERALL UNIT RATIO 1700 82 '
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0 eratin Time Continued With these calculated values the nominal expected operating time of this valve can be calculated using the following equation:
STROKE TIME = STEM NUT REVOLUTIONS VALVE STROKE STEM NUT REVOLUTIONS/MINUTE 2.25 20.73 0.11 MINUTES/VALVE STROKE 6 '
SECONDS/VALVE STROKE This valve has no. specific stroke time requirements other than the generic 10 second maximum stroke time required by reference 2'3
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2 5 ~ 0 RESULTS CONCLUSIONS AND RECOMMENDATIONS 5.1 Results and Conclusions 1)
The actuator torque switch and limit switch ranges shall be established as shown in table 5.1.
TABLE 5 ~ 1 BASIC DATA AND SETUP RE UZREMENTS CLOSING THRUST RANGE (POUNDS)
MINIMUM MAXIMUM OPENING THRUST RANGE (POUNDS)
MINIMUM MAXIMUM 10,175 12 600 1, 800 12,600 RECOMMENDED CLOSE TORQUE SWITCH SETTINGS MINIMUM MAXIMUM RECOMMENDED OPEN TORQUE SWITCH SETTINGS MINIMUM MAXIMUM 182 FT-LBS 218 FT-LBS 32 FT-LBS 174 FT-LBS EQUIVALENT CLOSE WORMSHAFT TORQUE MINIMUM MAXIMUM EQUIVALENT OPEN TORQUE SWITCH DIAL SETTING MINIMUM MAXIMUM 135 IN-LBS ROTOR ¹1 90%
162 IN-LBS LIMIT SWITCH SETTINGS ROTOR ¹2 ROTOR ¹3 90%
ROTOR ¹4 1
HW TURN FROM FULL OPEN 3/8 HW TURN FROM FULL CLOSED 1
HW TURN FROM FULL OPEN 3/8 HW TURN FROM FULL CLOSED 5.2 Recommendations It is recommended that this valve be retested at maximum achievable differential pressure and flow upon completion of PCR-6547.
The test results will be evaluated to confirm the setup ranges established in this calculation are acceptable.
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AND:
MECHANICAL ENGINEER CAROLINA POWER
~ LIGHT Attachment A Calc. No. ~CS4020 Revision 2 Valve No. 1CS-745 Page 1 of 1 MANAGER OF ENGINEERING VELAN INC-DATE:
JANUARY 6 3.992 TIME:
2: 35PM
SUBJECT:
2" AND SMALLER VELAN GLOBE VALVES STATED THAT 904 OF FULL OPEN STROKE WOULD ALLOW FULL DESIGN FLOW.
Attachment B Calc. No.
CS4020 Revision 2 Valve No. 1CS-745 Page 1 of 3 YIA FAX Number oi pages Including this page:+
Please reply by FAX to:
Q Head Office and Plant No, 1
(514) 748-8635 Q Marketing (514) 748-7592 Q Plant No. 2 (514) 341-3032 Q Spare Parts (514) 342-2311 Q Plant No. 3 (802) 862-4014 Q Plant No,4 (514) 378-6865 Me ~ge No.:
EBS~B Oate:From'o:
Attention:
Copies to:
Subject/
Reference:
2 in STEM ANALYSIS Attachment B Calc. No. 'CS-0020 Revision 2 Valve No. 1CS-745 Page 2 of 3 UTILITY:
CAROLINA POWER AND LIGHT Order no. P9-W.Z.D.4:
2TM78FNM VALVE DWG-E73-62S STEM DWG.
7913 22 Design Temp.
Pressure Class 125 deg F
1500 lb STEM THRD.
1 1/8 -
3 ACME double lead STEM MAT.
SS 630 A-564 sa =
45950 Psi Code Case N-62-4 STEM DATA d1 d2 0.792 in.
0.917 in.
0.425 in.
0.396 in.
root dia of thread dim. at sec.
d2 dim. at sec.
k rad.
d/2 0.016 ft.lb./lb thread. factor 0.492 0-660 in."2 in 2
root area of thread area of sec.
d2 a3 1.224 in."2 area at d2 in shear 0'39 in."4 polar moment of iner-t'.a ot st=am rhreaa 0 in.
0 in.
0.019 in."4 eff. length of stem torcpxe arm radius Moment of Inertia E/2'd TTE2 2W >IS 2d Sloyd 389dS W l3h 9l 'ST 26r BG lDO
2 in Attachment B Calc. No. 'CS4020 Revision 2 Valve No. 1CS-745 Page 3 of 3 STEM ANALXSIS WMMWWMWWMMWMM UTILITY:
CAROLINA POWER AND LIGHT W.I AD. 4:
2TM78FNM VALVE DWG:
E73-62S STEM DWG 7913-22 Order no.
P9-Design Temp.
Pressure Class 125 deg F
1500 lb STEM THRD.
1 1/8 3 ACME double lead STEM MAT.
SS 630 A 564 Sy 113396 Psi Code Case N-62-4 STEM CALCULATION At Section dl Max Tr At Section d2 14432 lbs.
from Eq.
(19)
Max Tr At Section k 30347 lbs.
from Eq.
(20)
Max Tr 33756 lbs.
from Eq.
(21)
~Cf% ~~ ~~
~K
~RCt$ 52RCRCRt5~&Cg CC CC K KVCt& ~~KKCJC MAX Thrust/Torque CLOSING OPENING Tr./lbs. Tor./lb-ft Tr./lbs. Tor./1b-n CONTINUOUS DUTY ONE TIME 14432 35616 224 14432 554 35616 224 554 6iE'd TTEZ 2>E ITS Zd Sled 3P9dS NU l3h Z0:ST Z6i 88 lDO
/
ATI'ACHMENTC
- CS4020, Rev. 2 Page 1 of 1 Test:
4 3)23/51 22'49'i 5000 Tag.'iCS-752
-a0000 orce
=
-7884
( Ibs)
-i5000
.20000 52997 53S97 5%S97 55S97 5CS97 57S97 SWITCH A SWITCH B SWITCH C SWITCH D 52097 53097 Tiae in Seconds S5.397 55997 55S97 5CS97 57S97 Il-ZXPt6 ON 1CS-752:
Flow Isolation/Seating Thrust 2730 PSID
ATTACHMENTD
'CS4020, Rev. 2 Page 1 of 1 Test: i 3/23/9i 22'25'45 VOTER BENBOII
.%50
-%60 Tag'CS-752 orce
=
-456 (1bS)
-vo
-%80 25209 25309 25%09 25509 25609 25709 OLS 25209 25309 25%09 25509 25609 25709 Tiae in Seconds 25.453 Y-EICPND ON 1CS-752:
Average Closing Packing Load, Static Conditions
A%I'ACHMENTE
'CS4020, Rev.2
-Page 1 of 1 Test:
4 3/23/3i ZZ'49'ii Tag'CS-752 VOTES SENSOR once
= -13432
( Ib )
.15000
.20000 5530%
55%0%
5550%
556 5570%
5580%
SIITCH A SWITCH B SWITCH C SWITCH Ij 5530%
55% 0I}
5550%
556 5570%
5590%
Tiae in Seconds 55.688 Y-EXPrm ON lCS-752, Final Thrust Due to Inertia
ATlACHMENTF
'CS-0020, Rev.2 Page 1 of 1 Test' 3/23/3i 22'49'i (JOT'MOR
.f0000 Tag'CS-752 orce
= -iii3i (II)s)
-20000 5550%
55%0%
550%
5560%
5570%
5580%
IITCH A SMITCH B IITCH C SMITCH D 5550%
55%0%
550%
5560%
5P0%
5580%
Time in Seconds 55.488 1CS-752, Thrust At Torque Switch Trip
DISCIPLINE DESIGE VEBZFZCAXZON RECORD Attachment G Calc. No. 'CS4020 Revision 2 Valve No. 1CS-745 Page I of 2 Lnstnatfum to Veriffcation Perscssat P lant NP Project File Ho.
Oocunent Ho.
CS-+OZ 0 Rev 4
Level g 4 (Class A)
( ] Seismic (CLass S)
( ]
FP-Q (Ctass 0)
( ] Other Oesign v<<ificatfon should be done in accordance arith AHSL H45.2.11, Section 6, as amended by Regulatory Guide 1.64, Rev. 2.
Special instructions:
Oiscipline Project Engineer 11.
Veriffcatfon Ocxxmntatfon Applicability Oisci line Kecnanical HVAC ELectrical LCC Other Oisci ine Civil Structural Seismic Equip. QuaL.
Civil Stress Ffre Protection Environnantal Qualification Husan Factors Katerials
(](](]
(](](](](]
Verification Kethods Used:
Oesign Review
( ] Alternate Calculations
( ] Qualification Testing Oesign Oocunent Aceaotablgg Tes ~
Ho ( ]
- ceca>>nts attached.
Oesign Verifier Oate
/0 0
0 2 Acknouledg~~f Verificatfonr (OPE)
Oate 111. Resolutfon of C~st Caw>>nts Resolved (See Attached)!
(RE)
Action taken n>>kes Oesign Oocusents Acceptable:
Oesign Verifier Oate Oa'te (OPE)
Date Proc.
3.3 Rev.
38
OISCIPt.llK OESIGR VEIIFIClTIMRHXRO COOLANT QiEKT Attachment G Calc. No. 'CS4020 Revision 2 Valve No. 1CS-745 Page 2 of 2 Plant
- Project Flic wo.
Oonnant ao.
This sheet is anlv rtcaired Men ccmoants,ire beine made.
Camam No ~
Resolution Resolved tni tiallOace of At
~
I
~
.-.ev.
-'0