ML20141B815

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Rev 2 to MP 710.13, MOV Troubleshooting & Rev 2 to Maint Form 710.13-1, MOV Troubleshooting Data Sheet
ML20141B815
Person / Time
Site: Millstone  Dominion icon.png
Issue date: 06/11/1997
From:
NORTHEAST NUCLEAR ENERGY CO.
To:
References
PROC-970611, NUDOCS 9706240162
Download: ML20141B815 (42)
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\ *NDS Document Transmittal en8/97 To: Nuclear Regulatory Commission Addressee Unique # 140 Document Control Desk ROUTINE distribution Washington, D.C. 20555 The following documents have been revised. You are currently on distribution for these documents. Verify that all documents are included in this distribution set.

DOCUMENT BEY COPIES 710.13-1 2 1 MP 710.13 2 1 I

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400/;*t l$ll!Illllll,lllll(fillillll 9706240162 970618 PDR ADOCK 05000245 P PDR Return this form to NDS, MP475,3rd Floor, C/O Rick Lundin (x2446) as soon as received.

Signature Date: '

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Approval NJ Approval Date Effective Date PORC Mtg. No.

O V MOV Troubleshooting Data Sheet Valve Local ID AWO No.

1 Operations personnel contacted on failure Date )

I Step Inspection Results Reason for valve stroke (surveillance, plant i operation, auto-initiation, other) l Number of attempts to cycle valve electrically Time between attempted starts Motor feeder circuit breaker Closed / Open / Tripped 4.1.1 Thermal overload relay position Normal / Tripped Control power status Available / Unavailable "Open" direction limit switch (es) indication Valve Open / Intermediate "Close" direction limit switch (es) indication Valve Closed / Intermediate "Open" direction torque limit switch position Contacts Closed / Open "Close" direction torque. limit switch position Contacts Closed / Open

\ Torque switch "Open" contacts Contacts Closed / Open 4.6.4 Torque switch "Close" contacts Contacts Closed / Open Megger reading for motor Acceptance Criteria 125 VDC motors: >l MG 4.8.8.b. MG 480 VAC motors: h2MG Megger Serial No.

Calibration Due Date COMMENTS Form Initiator Date Maint. Form 710.13-1 Rev.2 Page1of1

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( ,/ MILLSTONE NUCLEAR POWER STATION f

MAINTENANCE PROCEDURE J

4 MOV Troubleshooting MP 710.13 Rev. 2 Y

m Sroe Tsinx Acr Review I l

0 Ws Approval: -w m~~ /Q J/ N (D

PORC Mtg. No: l - 9'7 - (19 2. Date: (o- l(- 9 7 Effective Date: (,-G.O-9'?

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Level of Use SME: W. Loweth Information

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A Millstone Unit 1 Q Maintenance Procedure MOV Troubleshooting TABLE OF CONTENTS

1. PURPOSE....................................................2
2. P R E R E Q U I S ITES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. P R E CAUTI O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. I NSTR U CTI O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.1 Initial Parame te rs . . . . . . . . . . . . . . . . . . . . . -. . . . . . . . . . . . . . . . . . . . 6 4.2 M OV Fails To Fully Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.3 MOV Fails To Operate Electrically . . . . . . . . . . . . . . . . . . . . . . . . 9 4.4 Incorrect Position Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.5 MOV Fails To Operate Manually . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.6 MOV Overtorques into Seat or Slams into Backseat s When Operated Electrically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.7 MOV Fails To Stroke'Within Specified Time . . . . . . . . . . . . . . . . . 22 4.8 Motor is in Locked Rotor Condition . . . . . . . . . . . . . . . . . . . . . . . . 24 4.9 Valve Motion is Opposite Desired Direction of Travel . . . . . . . . . 27 4.10 Valve Does Not Open-Thermal Binding, Pressure Locking, or Differential Pressure Disc Pinching . . . . . . . . . . . . . . . . . . . . . . . . 28
5. R EVI EW AND SI ON - O FF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6. R E F E R E N C ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7. S U M M ARY O F CI I AN G ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ATTACHMENTS AND FORMS Attachment 1,"MOV Fails to Fully Stroke" . . . . . . . . . . . . . . . . . . . . . . . . 33 Attachment 2,"MOV Fails to Operate Electrically" . . . . . . . . . . . . . . . . . 36 Attachment 3, " Incorrect Position Indication" . . . . . . . . . . . . . . . . . . . . . . 38 i

Attachment 4, "MOV Fails to Operate Manually" . . . . . . . . . . . . . . . . . . . 39 j Maint. Form MP 710.13-1,"MOV Troubleshooting Data Sheet" l l

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MP 710.13 Levelof Use STOP THINK ACT REVIEW Rev.2 Information 1 of 39 I j

F p 1. PUR63E V Objective 1.1 The objective of this procedure is to provide instructions for troubleshooting MOVs.

1.2 Discussion Instructions are provided to gather initial data and determine a possible cause of the failure. Once the failure is determined a course of corrective action is suggested to fix the problem.

This procedure is to be performed by personnel with extensive knowledge and training in MOVs. Any maintenance or corrective actions specified in this procedure must be reported to the FLS and performed in accordance with the approved operator preventive maintenance merhaul, or adjustment procedures. However, some maintenance tasks such as valve stem inspection and lubrication, handwheelinspection and lubrication, meggering, continuity checks of wiring, and limit switch inspection may be performed using this procedure.

MOV Coordinator must be consulted prior to troubleshooting valves that O fail within the GL89-10 Program as indicated on the AWO. For these U valves, MOV Coordinator may need to gain approval from site MOV Engineering group or a representative prior to performing specific sections of this procedure.

2. PREREOUISITES 2.1 General 2.1.1 An AWO has been prepared and approved by Unit 1 Operations Department and Performance Evaluations Department as l necessary.

2.1.2 The valve has been declared INCPERABLE or unavailable prior

to performing any maintenance described in Sections 4.2 through l 4.10. (The valve does not need to be declared INOPERABLE or I unavailable in order to gather the initial parameters information described in Section 4.1.)

2.2 Documents i

2.2.1 WC 10, (Att)," Lifted Lead and Jumper Device Data Sheet" O MP 710.13 Level of Use STOP THINK ACT REVIEW dcv. 2 lnformation 2 of 39 r

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, r . l 2.2.2 Applicable control wiring diagram 2.2.3 Engineering-approved torque switch settings 2.2.4 C MP 703A1,"Limitorque Operator Preventive Maintenance 1 (EQ)"  ;

., 1 2.2.5 C MP 703A2,"Limitorque Operator (SMB 000 and SMB 00)

Maintenance (EO)"

h 2.2.6 C MP 703A3, "Limitorque Operator Maintenance (EQ) (SMB-0

{ to -4T, and SB-0 to -4)"

2.2.7 MP 710.3," Overhaul of Crane Teledyne Motor Operated Valve., I (EQ)" l i 2.2.8 MP 710.9," Preventive Maintenance for Crane Teledyne Motor ,

Operated Valves (EO)" l 1

2.2.9 MP 711.12," Repacking and Live Load Installation" j 2.2.10 C PT 1420E, "Limitorque Actuator Test" 2.2.11 C PT1420X, "MOV Testing Using VOTES and MOVKfS Torque Thrust Cell" i

2.3 Measuring and Test Equipment (M&TE)  ;

2.3.1 All M&TE has been calibrated in accordance with WC 8,

" Control and Calibration of Measuring and Test Equipment" and the calibration is current. l 2.3.2 Megger with a range of 0 to 1000 volts, and an accuracy of 1.5%

of full scale length, such as QA-1625 2.3.3 Digital multimeter with a range of 0 ohms to infinity and an accuracy ofi2% such as QA-1654 2.3.4 VOTES system 100 and accessories 2.3.5 Motor Power Monitor (MPM) System m

U MP 710.13 Level of Use STOP THINK' ACT REVIEW Rev.2 hodon 3 of 39

, 2.4 - Tools and Consumables 2.4.1 Tools

  • Electrician's standard tool kit Mechanic's standard tool kit 2.4.2 Equipment J Strip chart recorder or equivalent (i.e., VOTES test equipment) 2.4.3 Consumables {

Approved cleaning solution such as HydraFoam 2020 or  ;

Electra Clean l Dowel rod or Tie-wrap

  • Low-lint cloths I

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  • Mobil 28 lubricant for valve stem 2.5 Personnel 2.5.1 Personnel performing this procedure must be trained and qualified on the operator under maintenance or an MOV Coordinator.

2.6 Responsibilities I 2.6.1 Operations Department is responsible for electrically stroking valve and for Control Room communications as necessary.

2.6.2 Generation Test Services is responsible for connecting diagnostic equipment, when required, and obtaining valve signature.

f O MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 lnfOrmat.lOn 4 of 39 vn- -

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3. PRECAUTIONS i

! - 3.1 Consumables to be used in or on power plant components must he

. controlled in accordance with CC 1, " Control of Chemical Consumable
- Products."

3.2 Hazardous waste must be disposed of in accordance with CC 1, " Control of Chemical Consumable Products."

, 3.3 During disassembly, all disassembled parts should be tagged or identified.

All mating parts should be identified for proper match-up during

assembly.

3.4 Environmental qualification of EQ equipment should be maintained by adhering to the requirements of specification SP-M1-EE-351,

" Millstone Unit One Environmental Qualification Master List and Equipment Qualification Records."

3.5 Operations Department must operate valve unless blue tag is hung on operator handwheel, allowing maintenance personnel to operate.

3.6 MOV Coordinator must be consulted for development of a troubleshooting plan prior to start of any work on a GL89-10 Program valve (ie. diagnostic testing equipment required). Portions of this procedure may be used in conjunction with the specific troubleshooting j plan.

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Level of Use

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l p 4. INSTRUCTIONS O 4.1 Initial Parameters  !

4.1.1 RECORD the following as-found conditions on Maint. Form  :

710.13 - 1: '

Reason for valve stroke (surveillance, plant operation, auto-initiation, other)

IE applicable, number of attempts made to cycle valve electrically IE applicable, time between attempted starts Any known history of operational problems Comments relating to system conditions, pressure flow, l

temperature, noise, odor, and local position Motor feeder circuit breaker position

"Open" direction limit switch (es) indication I *

"Close" direction limit switch (es) indication a "Open" direction torque limit switch position

  • "Close" direction torque limit switch position 4.1.2 Refer To Maint. Form 710.13-1, and DETERMINE if problem is one listed in Table - 1, and Go To the applicable section for further instructions.

Table - 1. Reported Problems PROBLEM SECTION i

MOV fails to fully stroke 4.2 & Attachment 1 MOV fails to operate electrically (ie., no valve movement) 4.3 & Attachment 2 Incorrect position indication 4.4 & Attachment 3 MOV fails to operate manually 4.5 & Attachment 4 MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2

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MOV overtorques into seat or slams into backseat when operated

, 4'6 electrically MOV fails to stroke within specified time 4.7 MOV found in motor locked rotor condition 4.8 Valve motion is opposite desired direction of travel 4.9 MOV fails to open (thermal binding, pressure locking or 4'10 differential pressure disc pinching is suspected) 4.1.3 E the problem cannot be identified as one listed in Table - 1, CONSULT MOV Coordinator for further instructions. l 4.2 MOV Fails To Fully Stroke C AUTION 1

If motor is in a locked rotor condition and is not immediately deenergized, permanent damage to motor will result.

NOTE Attachment 1 provides a troubleshooting tree for anticipated sequence of tasks to be performed during troubleshooting of this problem. The tree should be used as guidance only and not to direct the performance of individual maintenance activities.

4.2.1 E motor is in locked rotor condition, PERFORM the following:

a. Immediately DEENERGIZE motor.
b. Go To Section 4.8.

4.2.2 REMOVE limit switch cornpartment cover.

4.2.3 CONSULT Operations Department before changing valve position and PERFORM the following:

a. ATTEMPT to operate valve manually and DETERMINE if valve is frozen on seat, in midposition, or on backseat.

O MP 710.13 Level of Use g g STOP THINK ACT REVIEW Rev.2 7 of 39

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O sort i MOV Coordinator or FLS may direct Section 4.10 be performed, MOV diagnostic equipment be employed, or may provide opening torque value.

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b. IE valve is frozen on seat, in midposition, or on backseat, CONSULT MOV Coordinator or FLS for further direction.

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I When a weak-link analysis has been exceeded, operator disassembly may need to be performed. Further examination of weak link or gear casmg is required before equipment can be returned to service.

c. If operator is on GL89-10 program valve, REQUEST MOV Design Engineering to determine if a weak-link evaluation has been exceeded and PERFORM operator disassembly and i testing as directed. l pQ
d. ESTABLISH communications with additional Maintenance personnel at MOV circuit breaker and PERFORM the following:
1) ATTEMPT to operate valve electrically and DETERMINE the point at which movement ceases.
2) WIIEN valve movement ceases, immediately DEENERGIZE motor.
e. WIlEN valve motion ceases, IDENTIFY cause of problem as one listed in Table - 2, and Go lo applicable section or step.

Table - 2. Identified Causes CAUSE SOLUTION Motor overload protective device actuated Go To step 4.3.5.c.

Torque switch contacts opened Go To step 4.6.8 Limit switch contacts opened Go To step 4.6.7 O

v MP 710.13 Level of Use STOP mlNK ACT REVIEW Rev. 2 Information 8 of 39

O 4.3 MOV Falls to Operate Electrically V

C A UTIO N If motor is in a locked rotor condition and is not immediately deenergized, permanent damage to motor will result.

NOTE Attachment 2 provides a troubleshooting tree for anticipated sequence of tasks to be performed during troubleshooting of this problem. The tree should be used as guidance only and not to direct the performance of individual maintenance activities.

4.3.1 CONSULT Operations Department before changing valve position.

4.3.2 ESTABLISIl communications with additional Maintenance personnel at MOV circuit breaker and PERFORM the following:

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a. ATTEMPT to operate valve electrically,
b. IE valve is in locked rotor condition, immediately DEENERGIZE motor.

NOTE MOV Coordinator or FLS may direct Section 4.10 be performed, MOV diagnostic equipment be employed, or manual valve stroke be attempted.

4.3.3 IE motor is in a locked rotor condition, CONSULT MOV Coordinator or FLS for further direction.

4.3.4 DETERMINE which of the following conditions exist:

  • Motor is not running and motor is not in a locked rotor condition.
  • Motor is running and actuator is not moving valve stem.

O MP 710.13 Level of Use 6# " # ##

Information 9 of 39

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'V p 4.3.5 E motor is not running AND is not in a locked rotor condition, PERFORM the following:

a. DETERMINE if line voltage is available at motor terminals.
b. E line voltage is available at motor terminals, PERFORM the following:
1) DEENERGIZE and and REQUEST Operations Department to tag out motor operator.

l 2) INSPECT motor and motor leads for open circuit. .

l 1 3) E necessary, REQUEST AWO to repair or replace j motor leads.

4) E necessary, Refer To applicable overhaul procedure and REQUEST AWO to repair or replace motor.

! c. E voltage is not available at motor terminals, PERFORM 1 the following:

1) ENSURE power is available to actuator control circuits.

O 2) INSPECT motor overload device (s) for continuity and for correct type and size.

3) INSPECT motor feeder conductors and motor windings for continuity.
4) INSPECT motor and control circuits are properly connected.
5) PERFORM point-to-point continuity checks of control circuits.
6) Eloose or broken connections are found during continuity checks, REQUEST AWO to repair or replace wiring as necessarf.
7) E continuity check results are satisfactory, manually OPERATE actuator and INSPECT for correct mechanical operation.

O MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 Information 10 of 39 -

4 5 e O sore If stem is not moving, internal threads of stem nut may be stripped.

J 4.3.6 E valve stem is not moving, AND operator is Limitorque operator, PERFORM the following:

a. DEENERGIZE and REQUEST Operations Department to
tag out motor operator.

, b. Refer To operator removal section in applicable Limitorque

operator overhaul procedure, and INSPECT stem nut thread engagement is satisfactory as follows

E necessary, REMOVE stem nut and ENSURE threads

, are not stripped.

E necessary, REPLACE stem nut and locknut.

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c. Refer To motor removal section in applicable Limitorque operator overhaul procedure and REQUEST AWO to q - remov.e actuator motor.

"V d.

Refer To appropriate removal or inspection section in applicable Limitorque overhaul procedure and INSPECT the following for damage or abnormal wear:

Drive pinion l

a Worm shaft gear and key

. Drive pinion mesh with worm shaft gear Tripper finger position

  • Tripper block, fingers, and declutch shaft are free to move t

4.3.7 E valve stem is not moving AND operator is Teledyne operator, PERFORM the following:

a. DEENERGIZE and REQUEST Operations Department to tag out motor operator.

<O MP 710.13

, Level of Use STOP THINK ACT REVIEW Rev.2

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b. Refer To MP 710.3," Overhaul of Crane Teledyne Motor O Operated Valves (EQ)," and REMOVE actuator motor,
c. Refer To appropriate removal or inspection section in MP 710.3 and INSPECT the following for damage or abnormal wear: j l
  • Motor drive helical gears ]
  • Worm and worm gear
  • Pinion and ring gear
  • Clutch and clutch spring
d. E cause of malfunction has not been identified, CONSIDER damaged or stripped yoke sleeve causing binding. l 4.3.8 E cause of malfunction cannot be determined, Refer To applicable overhaul procedure and DISASSEMBLE and ,

INSPECT actuator and yoke sleeve adapter. l l O

4.4 Incorrect Position Indication NOTE Attachment 3 provides a troubleshooting tree for anticipated sequence of tasks to be performed during troubleshooting of this problem. The tree should be used as guidance only and not to direct the performance of individual maintenance activities.

4.4.1 REQUEST Operations Department to INSPECT Control Room valve position indicating lamps for failure.

4.4.2 E necessary, REQUEST AWO to replace lamps.

4.4.3 ESTABLISH communications with Control Room.

4.4.4 ENSURE control power is available.

O MP 710.13 Level of Use SW h M RE e Rew 2 Information 12 of 39

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4.4.5 PERFORM one of the following as applicable:

A)

%. i CONSULT Operations Department and electrically '

STROKE valve to it:: full open position.  ;

C AUTIO N l Unless blue tag is hung on handwheel, Operations Department must be ,

requested to operate handwheel. ,

l With actuator in manual mode, ROTNTE handwheel in open direction and ENSURE valve is fully open.

4.4.6 E Control Room open position light indicates valve is not open, l DEENERGIZE control power and PERFORM the following:

a. PERFORM point-to-point continuity checks oflimit switch wiring.
b. E loose or broken connections are found during continuity checks, REQUEST AWO to repair or replace wiring as necessary.
c. E operator is Teledyne operator, Refer To control compartment inspection section of MP 710.9," Preventive Maintenance for Crane Teledyne Motor Operated Valves (EQ)," and PERFORM the following
1) E necessary, REMOVE limit switch compartment cover. l
2) ENSURE limit switch mounting hardware and all parts are tight.
3) INSPECT all indication contacts for dust, corrosion, and pitting.
4) E necessary, REQUEST AWO to repair or clean contacts.
5) Refer To verification of limit switch operatica in MP 710.10," Post Overhaul Testing of Crane Teledyne Motor Operated Valves (EQ)" and VERIFY limit switch operation.

O MP 710.13 Level of Use STOP THINK ACT- REVIEW Rev.2 Information 13 of 39

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6) 1E necessary, Refer To MP 710.10, " Post Overhaul l Testing of Crane Teledyne Motor Operated Valves (EQ)"

and REQUEST AWO to adjust limit switches.

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d. LE operator is Limitorque operator, Refer To limit switch ,

compartment inspection section in C MP 703A1, "Limitorque

! Operator Preventive Maintenance (EQ)," and PERFORM '

the following
1) IE necessary, REMOVE limit switch compartment cover and INSPECT the following:

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Limit switch rotor (s), including rotor-to-rotor shaft pin (s) engagement

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Limit switch contacts g

j 2) Refer To limit switch grease inspection section in C MP

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703A1,"Limitorque Operator Preventive Maintenance (EQ)," and INSPECT gear frame grease.

3) IE necessary, Refer To limit switch compartment i disassembly section in applicable overhaul procedure and O REQUEST AWO to remove limit switch and inspect O drive train components for damage. i
4) LE necessary, Refer To applicable overhaul procedure and REQUEST AWO to repair or replace damaged limit i switch components. ]

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V MP 710.13 Level of Use SToP WM ACT RE e Rew 2 Information 14 of 39

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4.5 MOV Falls To Operate Manually CAUTION Unless blue tag is hung on handwheel, Operations Department must be ,

requested to operate handwheel.

NOTE  !

Attachment 4 provides a troubleshooting tree for anticipated sequence of tasks to be performed during troubleshooting of this problem. The tree should be used as guidance only and not to direct the performance of individual maintenance activities.

6 4.5.1 CONSULT Operations Department and PERFORM the l

following
a. OPERATE valve manually.

p b. VERI.FY declutch lever remains in manual mode position or

V is held down.

4.5.2 IE necessary, Refer To applicable overhaul procedure and REQUEST AWO to adjust declutch tripper mechanism.

p MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 Information 15 of 39 L

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fG 4.5.3 E operator remains in manual operation with motor running, d Refer To applicable overhaul procedure and REQUEST AWO to ,

inspect and repair the following as necessary: l Deformed declutch shaft E Limitorque operator, tripper fingers equal in length or not l )

properly positioned on adjustment arm '

i E Teledyne operator, broken clutch spring or damaged clutch .

lugs l

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  • Lubricant hardening 'l Clutch key or clutch lugs stuck Machine marks on mating parts Motor pinion or worm shaft gear loose

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l Worm shaft incorrectly assembled '

O NOTE MOV Coordinator may provide instructions on use of any of the following:

VOTES equipment to monitor pullout forces Use of cheater bar to open valve with engineering approval Applying heat to valve to relieve binding 4.5.4 E valve does not operate manually after seating or backseating electrically, CONSULT MOV coordinator for method of moving valve.

4.5.5 E handwheel turns during electrical valve operation, PERFORM the following:

a. INSPECT for grease hardening on handwheel assembly and REMOVE hardened grease.
b. E necessary, REQUEST AWO and PERFORM the 4

following:

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, 1) REMOVE handwheel assembly and housing cover.

4O MP 710.13 Level of Use Information W m R Ew Rew 2 16 of 39

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2) INSPECT drive lugs for damage.
3) REPAIR or REPLACE drive lugs as necessary.
4) REMOVE hardened grease. ,
5) INSPECT housing cover gasket,
c. E Teledyne operator, DETERMINE existing grease using the table below, and using the same grease, LUBRICATE handwheel assembly.

Lubricant Base Color Mobil EP-0 Lithium Medium Brown l 1

Exxon Nebula EP-0 Calcium Dark Tan  !

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d. E Limitorque operator, using Exxon Nebula EP-0 grease, LUBRICATE handwheel assembly.

4.5.6 E handwheel turns AND valve does not respond, Refer To applicable overhaul procedure, REQUEST AWO and PERFORM the following:

O O a. REMOVE handwheel and housing cover assembly.

!l b. INSPECT handwheellugs for damage.

c. REPAIR or REPLACE lugs as necessary.
d. ENSURE clutch keys are protruding from their slot in upper drive assembly roller bearing.
e. INSTALL handwheel and housing cover assembly.
f. E operator is Limitorque operator, REQUEST.AWO to inspect the following for proper installation or damage and to
repair as necessary:

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  • Declutch tripper
  • Declutch shaft

- Declutch fork MP 710.13

, Level of Use STOP THINK ACT REVIEW Rev.2 lnformat. ion 17 of 39

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(~s g. E operator is Teledyne operator, REQUEST AWO to

( inspect the following for proper installation or damage and to repair as necessary:

  • Clutch
  • Clutch shaft 4.5.7 E cause of actuator malfunction has not been determined at this point, Refer To applicable overhaul procedure, and REQUEST AWO to disassemble and inspect actuator.

4.6 MOV Overtorques into Seat or Slams into Backseat When Operated Electrically C AUTION When a weak-link analysis has been exceeded, operator disassembly may need to be performed. Further examination of weak link or gear casing is required before equipment can be returned to service.

I 4.6.1 E operato'r is on GL89-10 program valve, REQUEST MOV l Design Engineering to determine if a weak-link evaluation has been exceeded and PERFORM operator disassembly and testing as directed.

4.6.2 Refer To applicable control wiring diagram, and DETERMINE whether torque or limit switch should stop actuator for travel direction in question.

4.6.3 E operator is on GL89-10 valve, REQUEST Engineering to provide approved torque switch settings.

I 4.6.4 RECORD torque switch open and close contacts on Maint. Form l MP 710.13-1. j 4.6.5 Refer To the applicable preventive maintenance or adjustment procedure and INSPECT torque switch for correct setting.

4.6.6 REQUEST permission from Operations Department to manually cycle valve in direction of suspected fault, and DETERMINE which stroke limit device (torque or limit switch) is actually ,

stopping valve motion. l P

d MP 71013 Level of Use ST P THINK ACT REVIEW Rev.2 Informatien 18 of 39 ,

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p 4.6.7 IE actuator is being stopped by the limit switch, PERFORM the

\ following:

a. Refer To control wiring diagram and OBTAIN desired limit switch actuation position.

1 C AUTIO N Unless blue tag is hung on handwheel, Operations Department must be i requested to operate handwheel. I

b. POSITION valve manually to the position at which limit switch actuation is desired and DETERMINE iflimit switch I actuates. I
c. IE limit switch does not actuate at desired valve position, l ADJUST limit switch. l
d. IE necessary, CONNECT strip chart recorder, or equivalent (i.e., diagnostic test equipment) to motor and control circuits such that the following may be recorded during valve l operation:

Torque switch actuation Open or closed limit switch operation a

Motor operating current MP 710.13 Level of Use Information SW W RE e Rew 2 19 of 39

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O sore If valve coast is excessive after limit switch actuation, then one of the following conditions is true:

Control circuit fault exists.

  • Valve stem nut is loose.

Stem or stem nut has an actuator ratio that is not self-locking.

System line pressure is extending coast.

e. REQUEST Operations Department to electrically operate valve, and PERFORM the following:

VERIFY correct limit switch actuation.

OBSERVE any coast following limit switch actuation.

f. REQUEST Operations Department to electrically operate valve a minimum of two times and VERIFY proper operation.

/~' g. Elimit switch actuates AND motor does not stop,

( PERFORM the following:

1) ENSURE motor starter contactors are free and operate smoothly.
2) ENSURE limit switch and motor control wiring are in accordance with applicable control wiring drawing (s).

4.6.8 E actuator is being stopped by torque switch, PERFORM the following:

NOTE The following step checks the mechanical movement integrity of the torque switch.

a. E Limitorque operator, gently ATTEMPT to move striker plate in both directions and ENSURE that it is in engaged in worm, shaft.

O MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 lnformation 20 of 39 e

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l b. INSPECT torque switch for the following:

Proper installation Mechanical movement integrity Contact condition l

Physical damage

c. E Teledyne operator, Refer To torque limit setting section of l
MP 710.3," Overhaul of Crane Teledyne Motor Operated Valves (EQ)," DETERMINE degree of torque switch spring tension, and RECORD in " Comments" section on Maint. i Form 710.13-1. l
d. E necessary, CONSULT Engineering and PERFORM the following as applicable:

IE operator is Limitorque, Refer To torque switch baiancing and adjustment section in C PT 1420E, "Limitorque ActuatorTest,"and REQUEST AWO to adjust torque switch setting.  :

A O +

E operator is Teledyne, Refer To torque limit setting section of MP 710.3," Overhaul of Crane Teledyne Motor Operated Valves (EQ)," and REQUEST AWO to adjust torque limit setting.

c. IE torque switch settings are changed, PERFORM applicable action:
  • E valve is GL89-10 valve, CONSULT MOV Coordinator to direct performance of diagnostic testing and ENSURE valve does not overtorque into seat.

REQUEST Operations Department to electrically cycle valve a minimum of two times and ENSURE valve does not overtorque into seat.

4.6.9 IE cause of malfunction cannot be determined, CONSULT MOV Coordinator for direction.

O MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 Information 21 of 39

. 1 m 4.7 MOV Fails To Stroke Within Specified Time l

NOTE l

^

The following procedures may be used as necessary during the  !

performance of this section: j

! =

PT 1420E "Limitorque Actuator Test" C PT,1420B series procedures for VOTES equipment setup and data

acquisition j i
  • C PT 1420AA," Motors and Motor Driven Machines" 1

4.7.1 CONSULT GTS and CONNECT strip chart recorder, or j equivalent (i.e., VOTES test equipment), to motor and control

, circuits such that the following may be recorded during valve

operation

i

= 'Ibrque switch actuation Open or closed limit switch operation j

  • Motor operating current O +

Motor terminal voltage (s)

I j 4.7.2 REQUEST Operations Department to electrically operate valve and OBTAIN valve signature.

I j 4.7.3 Refer To previously obtained strip chart recorder or VOTES

traces (or baseline data) and COMPARE new data for the j following

j

  • Motor running current j
  • Maximum current

. Terminal voltage readings 4.7.4 E motor current has increased appreciably, PERFORM the following:

a. INSPECT valve packing condition and adjustment.
b. E necessary, Refer To MP 711.12, " Repacking and Live Load A Installation" and ADJUST or REPACK.

U MP 710.13 Level of Use SToP THINK ACT REVIEW Rev. 2 Information 22 of 39

s . .

"~ ""*"""*"'"'"""'"'""""'""'"*""'"'""""""'

CD degraded voltage conditions.

C AUTIO N Unless blue tag is hung on handwheel, Operations Department must be requested to operate handwheel.

4.7.5 Manually OPERATE valve and DETERMINE if excessive force is required to move valve.

4.7.6 IE determined that excessive force is required to move valve, Refer To valve stem inspection section in applicable preventive maintenance procedure and PERFORM the following:

a. INSPECT valve stem for the following:
  • Cleanliness

= Lubrication

- D'amage

b. IE stem is bent or damaged, REQUEST AWO to remove and repair actuator as necessary,
c. IE stem is not bent or damaged, CLEAN stem, and, using Mobil 28 grease, LUBRICATE stem.

4.7.7 Refer To applicable preventive maintenance procedure and PERFORM the following:

a. INSPECT actuator lubricant level,
b. REMOVE small sample of actuator lubricant and INSPECT for hardening or contamination,
c. If lubricant is hardened or contaminated, Refer To applicable overhaul procedure and REQUEST AWO to perform the following:
1) REMOVE old lubricant and CLEAN actuator.

(~'s 2) FILL actuator with new lubricant.

LJ MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 lnformation 23 of 39

. . j

}; , ' 1 C A UTIO N

' Use caution to prevent mixing of grease t " pes. If grease th cannot be identified, all grease must be replaced with new grease.

d. IE lubricant level is low, ADD lubricant to desired level.

4.7.8 REQUEST Operations Department to electrically cycle valve.

] 4.7.9 DETERMINE whether stroke time is within specifications.

4.7.10 IE valve does not stroke within specified time limits, EVALUATE further.
a. INCLUDE but do not limit evaluation criteria to the following:

]

Degraded voltage Degraded or incorrect lubricant

  • D'egraded valve Degraded actuator Incorrect operator gear ratio 4.8 Motor is in Locked Rotor Condition i 4.8.1 Immediately DEENERGIZE motor.

NOTE MOV Coordinator may direct Section 4.10 be performed, or opening torc ue may be provided, or employment of diagnostic test equipment may j be clirected.

1 4.8.2 NOTIFY MOV Coordinator of locked rotor condition and OBTAIN instructions to manually cycle valve to ensure valve is not frozen in place on its seat or backscat.

O MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 Information '

24 of 39

l l .

l

. I

~ . .

I l (-] 4.8.3 E valve is frozen in place, Refer To Section 4.10, and l V CONSIDER thermal binding, pressure locking, or differential l pressure disc pinching as a possible cause of malfunction.

1 C AUTIO N When a weak-link analysis has been exceeded, operator disassembly may  !

need to be performed. Further examination of weak link or gear casing is j required before equipment can be returned to service.

4.8.4 E operator is on GL89-10 program valve, REQUEST MOV Design Engineering to determine if a weak-link evaluation has been exceeded and PERFORM operator disassembly and testing as directed.

C AUTIO N I

Unless blue tag is hung on handwheel, Operations Department must be l requested to operate handwheel. l m

4.8.5 Refer To applicable preventive maintenance procedure and PERFORM valve stem inspection including the following:

INSPECT valve stem for bends or damaged threads.

  • INSPECT valve stem for cleanliness and lubrication.

E necessay, CLEAN and LUBRICATE valve stem.

4.8.6 Refer To records of recent maintenance activities as necessay, and DETERMINE whether improper packing installation or adjustment is responsible for undue resistance to valve operation.

4.8.7 E necessary, Refer To MP 711.12," Repacking and Live Load In.;tallation," REQUEST AWO to replace or adjust packing, and RESOLVE packing or lubrication problems as necessary.

4.8.8 PERFORM insulation resistance check as follows:

a. RECORD megger serial number and calibration due date on Maint Form 710.13-1.

O d

MP 710.13 Level of Use 8# # "

lnformation 25 of 39

  • . . 1 1
b. PERFORM applicable action and RECORD megger reading on Maint Form 710.13-1:

E motor is 125 VDC motor, using 500-volt megger, MEGGER motor. j E motor is 480 VAC motor, using 1000-volt megger, MEGGER motor.

I

c. E megger value of motor does not meet the following acceptance criteria, CONSULT MOV Coordinator or FLS for further maintenance instructions:

i 125 VDC motors: 21MQ i

i

  • 480 VAC motors: 22 MQ l 4.8.9 INSPECT motor starting contactor for dirt or damage and REQUEST AWO to REPAIR as necessary.

4.8.10 Refer To applicable sections in overhaul procedure and i j REQUEST AWO(s) to perform the following:

a. REMOVE actuator motor.

4

b. PERFORM the following inspection:
C A UTIO N i For Limitorque operators, do not declutch to motor operating mode by full rotation of worm shaft.

MOVE worm shaft gear and INSPECT for ease of movement to determine actuator binding or rotational

, lockup.

4 INSPECT motor for ease of rotation.

c. REPAIR or REPLACE components as necessary.

t

(

MP 710.13 Level of Use Information 26 of 39

l l

e 4.8.11 IE valve stroked satisfactorily in manual mode in step 4.8.2, AND t cause of malfunction has not been determined, PERFORM the following:

a. CONSULT Operations Department and ATTEMPT to electrically operate valve through its full opening and closing strokes.
b. IE valve does not stroke satisfactorily, Refer To removal and inspection sections in applicable overhaul procedure and REQUEST AWO to disassemble and inspect actuator.
c. EVALUATE the following as possible causes or contributors to malfunction:

. Minor disc thermal or hydraulic binding in closed position Loose chemical, corrosion, or foreign material buildup on valve stem Initial packing binding Temporary foreign material fouling Excessive differential pressure or vibration not present during troubleshooting

. Hardened or degraded stem lubricant Torque switch or control circuit fault Loose stem locknut or faulty stem nut

d. Refer To applicable maintenance procedures and REQUEST AWO to perform any inspections or repairs as necessary.

4.9 Valve Motion is Opposite Desired Direction of Travel 4.9.1 ENSURE correct phase sequence at line side of controller contactors.

4.9.2 Refer To control wiring diagram and ENSURE control switch (es) are prope,rly connected.

O MP 710.13 Level of Use . .

SW M M RE e Rew 2 lnformation 27 of 39

-s O sore 4

Interchanging any two ac motor phase leads changes rotational direction of l operator drive motor.

4.9.3 Refer To control wiring diagram and ENSURE motor is properly connected.

4.10 Valve Does Not Open-Thermal Binding, Pressure Locking, or l Differential Pressure Disc Pinching l NOTE 1

When a solid orflerib/c wedge gate valve is closed in a hot condition and then cools, attempts to open the valve may fail. In this instance some of the corrective measures may be as follows:

and heating valve body to allow s(eats to widenUsing approved heating Using torque wrench on MOV or valve handwheel and prying valve disc out of its seat Using MOV diagnostic. test equipment on valve stem to monitor disc pd pullout force Monitoring motor current at the motor control center if electrical operation is the preferred method for opening 4.10.1 CONSULTwith Operations and DETERMINE if thermal binding is a probable cause.

4.10.2 IE thermal binding is suspected, REQUEST FLS or MOV Coordinator to provide instructions for performing corrective measures.

MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 Information 28 of 39

1

  • l bq NOTE When a flexible-wedge or parallel-disc gate valve is closed, water or steam may get trapped in the valve bonnet area. If the body heats u 3 due to adjacent components or a fluid temperature increase, the trappet steam ,

or water forces the discs more tightly against the seats, keeping the valve locked closed. In this instance, some of the corrective measures may be as follows: 1

1. To relieve pressure trapped in the bonnet area:

Loosening packing gland bolts Removing the gland follower to allow packing to be partially worked out of the stuffing box Loosening or removing a gland leak off plug or opening a gland leak off isolation valve l

2. If above techniques are unsuitable:

Using torque wrench on MOV or valve handwheel to pry valve off its seat Using MOV diagnostic test equipment on valve stem to monitor disc pullout forces n 4.10.3 CONSULT with Operations and DETERMINE if pressure V locking is a probable cause.

4.10.4 IE pressure locking is suspected, REQUEST FLS or MOV Coordinator to provide instructions for performing corrective measures.

NOTE When valves (primarily solid-wedge gate valves) are closed under low-pressure conditions, subsequent increase and decrease in pipeline pressures may cause the wedge to get stuck between the seats. This phenomenon is referred to as differential pressure disc ainching. In this instance, some of the corrective measures may be as foi ows:

Pressurizing both sides of the valve and attempting to open valve Using torque wrench on MOV or valve handwheel and prying valve off its seat Using MOV diagnostic test equipment on valve stem to monitor disc pullout forces 4.10.5 CONSULT with Operations and DETERMINE if differential pressure disc pinching is a probable cause.

MP 710.13 Level of Use ST P THINK ACT REVIEW Rev.2 Information 29 of 39

! (~h, 4.10.(! E differential pressure disc pinching is suspected, REQUEST C/ FLS or MOV Coordinator to provide instructions for performing corrective measures, j- 4.11 Restoration 4.11.1 E operator is part of GL89-10 program, REVIEW work performed and prior to operator return to service, ENSURE MOV diagnostic testing is performed as necessary.

4.11.2 REQUEST Engineering to determine valve operability.

O i

i f

i i

i MP 710.13 Level of Use .

SToP THINK ACT REVIEW Rev.2 Information 2 300f39

~.

l

5. REVIEW AND SIGN-OFF 5.1 The review and sign-off of this procedure is satisfied by the review and j sign-off of the AWO.
6. REFERENCES 6.1 "NNECo Accident Prevention Manual" l

6.2 Maintenance Procedures 1

6.2.1 C MP 703A1,"Limitorque Operator Preventive Maintenance (EO)"

6.2.2 C MP 703A2,"Limitorque Operatar Maintenance (EO)

(SB/SMB-000 and SB/SMB-00, and SBD-00)" j 6.2.3 C MP 703A3, "Limitorque Operator Maintenance (EO) (SMB-0 l to -4T, and SB-0 to -4)" l l

l 6.2.4 C PT 1420E,"Limitorque Actuator Test" 6.2.5 C PT 1420X,"MOV Testing Using VOTES ar.d MOVATS 'im.que

.g Thrust Cell" 6.2.6 MP 710.9," Preventive Maintenance for Crane Teledyne Motor Operated Valves (EQ)"

6.2.7 MP 710.3," Overhaul of Crane Teledyne Motor Operated Valves (EQ)"

l 6.2.8 MP 711.12," Repacking and Live Load Inst Wation" 6.3 Mministrative Procedures 6.3.1 CC 1," Control of Chemical Consumable Products" 6.3.2 WC 8, " Control and Calibration of Measuring and Test Equipment" 6.3.3 WC 10," Jumper, Lifted Lead, and Bypass Control"

!O

! MP 710.13 Level of Use STOP THINK ACT REVIEW Rev.2 1

Information 31 of 39

A 7.

SUMMARY

OF CHANGES U

7.1 Added section to provide instructions to consult with FLS and MOV Coordinator if thermal binding, pressure locking, or differential pressure disc pinching is a suspected cause of valve failing to open. This was done in response to AR 96003605,"MOV Troubleshooting Plan."

7.2 Added precaution and paragraph to Discussion section b regards to GL89-10 Program valves. A troubleshooting plan needs to be developed by the MOV Coordinator.

7.3 Portions of the procedure regarding locked rotor were reorganized to reflect the severity of the locked rotor and more MOV Coordinator responsibility was added.

7.4 Added requirement to record additional as-found data such as reason for valve stroke; number of attempts made to cycle valve; time between attempted starts; known history of operational problems; and comments relating to system conditions, pressure flow, noise, temperature, odor, and local position.

7.5 Added requirement to request MOV Design Engineering to determine if weak-link evaluation has been exceeded.

0)

( 7.6 Added a prerequisite that the valve has been declared INOPERABLE or unavailable or both prior to performing any maintenance described in Sections 4.2 through 4.10.

l i

I 1

O i V

ut 710.13  ;

Level of Use STOP THINK ACT REVIEW Rev.2 Information 32 of 39 l

f% O O~ C  ;

V Attack [ent 1 V '  !

MOV Fails To Fully Stroke l MOV FAILS TO FULLY STROKE.

(Sheet I of 3)  ;

i NOTE  !

IS MOTOR IN LOCKED ROTOR CONDl W THIS TROUBLESHOOTING TREE iS NOTMEANTTODIREC THE '

YESl l NO PERFORMANCE OF WORK. IT ' '

PROVIDES A GUIDEUNE FOR l l ANTICtPATED WORK TO BE DONE i

h h DURING TROUBLESHOOTING OF A OBLEM IS MOTOR OVERLOAD l IMMEDIA'R.Y DEENERGlZE i MOTOR CONSULT MOV PROTEC1NE DEVICE ACTUATED?

  • COORDINATOR FOR MANUAL STROKE INSTRUCTIONS. YESl l NO {

l i 1r ,r _

4 "

IS VALVE FROZEN IN PLACE ON TO S (SHEET 3) ARE TOROUE SWITCH CONTACTS SEAT OR BACKSEAT 7 OPENED 7 l YES l '

l NO YES l l NO I l 1F 1r t CONSULT MOV COORDINATOR PERFORMANCE OF VALVE STEM TOROUE SWITCH INSPECTION FOR ARE UMIT SWITCH CONTACTS '

FOR FURTHER DIRECT!ON TO INSPECTION IS NECESSARY. THE FOLLOWING IS NECESSARY (MP OPENED?

  • CONSIDER THERMAL BINDING, (CMP 703A1 OR MP 710 9) 710.3, CMP 703A2 OR CMP 703A3): '

PRESSURE LOCKING. OR DIFFERENTIAL PRESSURE DISK a TOROUE SWITCH SETTING YES l lNO ,

= MECHANICAL MOVEMENT i PINCHING. 1r

  • ^ ~

IS INCORRECT PACKING OR qy 3y ADJUSTMENT CAUSING UNDUE

  • DAMAGE ,

= PROPER ENGAGEMENT IN CONSULT MOV COORDINATOR ,

RESISTANCE TO VALVE TO C (SHEET 2) FOR FURTHER DIRECTION. L OPERATION? (MAINT. RECORDS) WORM SHAFT (LIMITOROUE)

  • PRCPER TOROUE SPRING -r YES l l NO TENSION (TELEDYNE) j l

4 1r ,r -

PACKING REPI.ACEMENT OR IS MOTOR MEGGER READING PERFORMANCE OF TOROUE  !'

! ADJUSTMEfC iS NECESSARY ACCEPTABLE? (MP 710.10 OR SWITCH SETTING ADJUSTMENT (MP 71112 CMP 703A1) MAY BE NECESSARY. (CPT 1420E  !

OR MP 710.3)

YESl l NO i

1r 1r TO A (SHEET 2) CONSULT MOV COORDINATOR FOR FURTHER DIRECTION.

t i

i .

MP 710.13  ;

_ vel r't Use- Rev.2 STOP ' THINK ' ACT ' REVIEW

?for- ation 33 of 39  !

l r

A A A

V AttacUcnt 1 V

  • MOV Fails to Fully Stroke (Sheet 2 of 3)

FROM A(SHEET 1) FROM C (SHEET 1) t 1r ir  !

MOTOR REMOVAL AND DOES LIMIT SWITCH ACTL%!5i AT NOTE INSPECTION FOR THE FOLLOWING DESIRED POSITION YirtN VALVE THIS TROUBLESHOOTING TREE IS IS NECESSARY (MP 710.3. IS POSIT 10NCO MA JUA1W*

NOT MEANT TO D! RECT THE CMP 703A1 OR CMP 703A2): i PERFORMANCEOFWORK. IT YESl l NO

= EASE OF GOTATION PROVIDES A GUIDEUNE FOR = STARTING CONTACTOR ANTICIPATED WORK TO BE DONE DURING TROUBLESHOOTING OF A WOT SENG)

SPECIFIC PROBLEM

= ACTUATOR BINDING OR ROTATIONAL LOCKUP 3 1r 1r 1r IS MANUAL VALVE STROKE IS VALVE COAST EXCESSIVE LIMIT SWtTCH ADJUSTMENT SATISFACTORY? AFTER UMIT SWITCH ACTUATION? AND VERIFICATION IS NECESSARY. (MP 710.10 O*

CPT1 %

YES l l NO YES l l NO '

l l ,

h 1r 1r h ~

IS ELECTRICAL VALVE STROKE CONSULT MOV COORDINATOR INSPECTION AND CORRECTION DOES MOTOR STOP WHEN UMIT SATISFACTORY? FOR FURTHER DIRECTION. OR REPAIR OF THE FOLLOWING SWITCH ACTUATES?

CONDITIONS IS NECESSARY (MP 710.3, CMP 703A1 OR CMP 703A2):

YESl l NO YESl lMg , ,

= FAULTY CONTROL CIRCUlTS l = LOOSE VALVE STEM NUT h 1P = ACTUATOR RATIO MAY BE NON SELF-LOCKING CONSULT MOV COORDINATOR DISASSEMBLY AND INSPECTION FOR FURTHER DIRECTION. OF a.CTUATOR IS NECESSARY (MP 710.3. CMP 703A1 OR CMP 703A2) 1r 9r j 1r EVALUATE CONDillONS CONSULT MOV COORDINATOR INSPECTION AND CORRECTION OF PRESENTED IN STEP 4.8.11.c. IN FOR FURTHER DIRECTION. THE FOLLOWING CONDITIONS IS THIS PROCEDURE. NECESSARY (MP 710.3. CMP 703A1 OR CMP 703A2):

- FREE OPERATION OF MOTOR STARTER CONTACTORS

= UMIT SWITCH AND MOTOR

  • CONTROLW! RING AREIN
  • l_ ACCORDANCE WITH THE CWD i

MP 710.13 Level of Use .

Rev.2 STOP THINK ACT REVIEW Information 34 of 39

O f3 O~ '

U Attac\ceent 1

/ U s MOV Fails to Fully Stroke (Sheet 3 of 3)

FROM B (SHEET 1) 9P NOTE (S POWER AVAILABLE TO ACTUATOR CONTROL CIRCUITS?

THIS TROUBLESHOOTING TREE IS NOT MEANT TO DIRECT THE YES PERFORMANCE OFWORK. IT -

l NO PROVIDES A GUIDELINE FOR l ANTICIPATED WORK TO BE DONE DURING TROUBLESHOOTING OF A T g 1 T

SPECIFIC PDC 3LEM- tS MOTOR OVERLOAD DEVtCE RESTORE POWER TO ACT'JATOR ACTUATION. TYPE, AND SIZE CONTROL CIRCUlTS.

CORRECT?

YESl l NO I

u 4 ARE CONTINUITY CHECKS FOR NEW OVERLOAD DEVICE MOTOR FEEDER CONDUCTORS INSTALLATION IS NECESSARY AND MOTOR WINDINGS SATISFACTORY?

YES l l NO I ~

u 4 ARE CONTINUITY CHECKS OF CONSULT FLS FOR FURTHER D MOTOR AND CONTROL CIRCUITS DIRECTION.

SAT!SFACTORY7 YESl l NO -9r

! IS OPERATOR A LIMITOROUE OPERATOR 7 4 ,

WfRING REPLACEMENT OR I IS MANUAL ACTUATOR OPERATION SATISFACTORY 7 OF REPAIR IS NECESSARY YES l l NO I

YES l l NO 1P IS STEM NUT LOCKNUT TIGHT MOTOR REMOVAL AND AND STM7 INSPECTION FOR ITEMS LISTED IN 1P IS VALVE STEM MOVING DURING STEP 417c. IN THIS PROCEDURE CONSULT MOV COORDINATOR iS NECESSARY FOR FURTHER DIRECTION. ELECTRICAL OPERATION YES l l NO ATTEMPT 7 g YES l l NO l STEM NUT LOCKNUT TIGHTENING MOTOR REMOVAL AND h 1P INSPECTION FOR ITEMS LISTED IN AND STAKING OR REPLACEMENT IS NECESSARY (CMP 703A2 OR STEP 426.d. IN THIS PROCEDURE CONSULT MOV COORDINATOR TO D (THIS SHEET ) C?AP 703A3)

IS NECESSARY FOR FURTHER DIRECTION.

MP 710.13 Level of Use Rev. ,-

STOP THINK -ACT REVIEW Information 35 of 39

d~

O O O* .

i V L/ AttacLu/ent 2 g.

MOV Fails To Operate Electrically (Sheet 1 of 2)

MOV FAILS TO OPERATE NOTE ELECTRICALLY (NOVALVE MOVEMENT) THIS TROUBLESHOOTING TW +. tS NOT MEANT TO DIRECT THE h PERFORMANCE OF WORK. IT PROVIDES A GUIDELINE FOR IS MOTOR IN LOCKED ROTOR ANTIC! PATED WORK TO BE DONE CONDmON? DURING TROUBLESHOOTING OF A SPECIFIC PROBLEM I I 4 4 IMMEDIATELY DEENERGtZE IS MOTOR RUNNING?

MOTOR! CONSULT MOV '

COORDINATOR FOR MANUAL STROKE INSTRUCTIONS- YESl l NO I

,r ,r 4

IS VALVE FROZEN IN PLACE ON IS OPERATOR A UMITOROUE OPERATOR? TO A (SHEET 2)

SEAT OR BACKSEAT?

YESl l NO YESl l NO ~

I

,r 4 ,r 4 PERFORMANCE OF VALVE STEM is STEM NUT LOCKNUT TIGHT MOTOR REMOVAL AND CONSULT MOV COORUINATOR FOR FURTHER DIRECTION TO INSPECTION 18 NECESSARY AND STAKED? INSPECTION FOR ITEMS USTED IN CONSIDER THERMAL BINDING. STEP 4.3.7.c. IN THIS PROCEDURE L(CMP 703A1 OR MP 710 9)

PRESSURE LOCKING. OR IS NECCSSARY.

YES l l NO OlFFERENTIAL PRESSURE DISC PtNCH!NG. l 1r MOTOR REMOVAL AND STEM NUT LOCKNUT TIGHTENING INSPECTION FOR ITEMS LISTED: e AND STAKING OR REPLACEMENT STEP 4.3 6 d. IN THIS PROCEDURs. IS NECESSARY. ( CMP 703A2 OR ,

IS NECESSARY l CMP 703A3) 5 t

MP 710.13 Levelof Use Rev.2 STOP THINK ACT REVIEW Information 36 of 39

. . w .- a - - - -- - - - - - - - - - - - . . . , .. . ~ . . - - - ~ . - . ~ . - .

~'

D (D (% ' i V /

Attac\udent 2 V 't MOV Fails To Operate Electrically (Sheet 2 Of 2)

FROM A (SHEET 1)

NOTE THIS TROUBLESHOOTING TREEIS

,y NOT MEANT TO DIRECT THE -i PERFOHMANCE OF WORK. IT .;

I6 LINE VOLTAGE AVAILABLE AT PROVIDES A GutDEUNE FOR MOTOR TERMINALS DURING ANTICIPATED WORK TO BE DONE ELECTRICAL OPERATION ATTEMPT 7 DURING TROUBLESHOOTING OF A YES l lNO SPECIFIC PROBLEM.

I i a

IS CONTINUITY CHECK OF MOTOR IS POWER AVAILABLE TO LEADS SATISFACTORY 7 ACTUATOR CONTROL CIRCUITS 7 YESl l NO YES l l NO ,

I l

~

,r 4 ,r IS MOTOR OVERLOAD DEVICE 3

REPAIR OR REPLACEMENT OF REFAIR OF MOTOR LEAD WIRES IS RESTORE POWER TO ACTUATOR MOTOR IS NECESSARY (MP 710.3, NECESSARy ACTUATION. TYPE AND SIZE CON 1ROL CIRCU:TS.

CMP 703A2, OR CMP 703A3) CORRECT 7 YESl l NO ,

I

~

,r 4

  • ARE CONTINUtTY CHECKS FOR NEW OVERLOAD DEVICE MOTOR FEEDER CONDUCTORS INSTALLATION IS NECESSARY AND MOTOR WINDINGS SATISFACTORY 7 YESl l NO l

,r 4 ARE CONilNUiTY CHECKS OF CONSULT FLS FOR FURTHER MOTOR AND CONTROL CIRCUlTS DIRECTION.

  • SATISFACTORY?  ;

YES l l NO l J u 1 .t DISSASSEMBLY AND INSPECTION WIRING OR MOTOR REPLACEMENT j OF ACTUATOR IS NECESSARY OR REPAIR IS NECESSARY (MP 710.3.  !

(MP 710.3 CMP 703A1, OR CMP 703A2, OR CMP 703A3)

CMP 703A2) ,

MP 710.13 Level of Use Rev.2 STOP THINK ACT REVIEW lnformatiOn 37 of 39 t

O f [\ f ,

v Attacw/ i ent 3 LJ e,

~

Incorrect Position Indication CONTROL ROOM UGHTS (Sheet 1 Of I)

SHOW INCORRECT VALVE j

POSITION INDICATION.

h HAVE CONTROL ROOM NOTE INDICATING LAMPS FAILED? lH!S TROUBLESHOOTING TREE LS NOT MEANT TO DIRECT THE YESl l NO PERFORMANCE OF WORK. IT PROVIDES A GU!OEUNE FOR I ANTICIPATED WORKTO BE DONE h DURING TROUBLESHOOT!NG OF A CONTROL ROOM MP IS CONTROL POWER TO REPLACEMENT IS NECESSARY. INDICATING CiRCUlTS AVAILABLE?

YES l l NO I I 4 4 IS CONTINUITY CHECK OF UMIT RESTORE CONTROL POWER TO SWITCH WtRING SATISFACTORY? INDICATING CIRCulTS.

YESl l NO I

,r 4 ,

IS OPERATOR A UMITOROUE REPAIR OR REPLACEMENT OF OPERATOR? WIRING iS NECESSARY g e

YES l lHO I

1r IS UMIT SWITCH HARDWARE INSPECTION AND REPAIR OR TIGHT AND CONTACTS CLEAN?

CORRECTION OF THE (MP 710.10)

FOLLOWING IS NECESSARY YESl l MO n

(CMP 703A1): i

. UM!T SWITCH ROTORS  !

= LIMIT SWITCH CONTACTS 37 h

. UMtT SWITCH GREASE VERIFICATION AND ADJUSTMENT REPAIR OR CLEANING OF

. UMIT SWITCH GEAR TRAIN OF LIMIT SWITCHES IS CONTACTS IS NECESSARY NECESSARY (MP 710.10) (MP 710.9. MP 710.3)

MP 710.13 Level of Use Rev. 2 STOP THINK ACT REVIEW lnfOrmatiOn 38 of 39

e.

O O '

O* I.

U \

Atkchment 4 V s MOv FutS TO OeERATe MOV Fails to Operate Manually

"^"" "

(Sheet 1 of 1) l 4 _

DOES DECLUTCH LEVER REM AIN NOTE IN MANUAL POSITION 7 THis IROUBLESHOOTING TREE IS i NOT MEANT TO DIRECT THE YESl l NO PERFORMANCE OF WORK. IT l PROVIDES A GUIDEUNE FOR .

ANTICIPATED WORK TO BE DONE y, h DURING TROUBLESHOOTING OF A DOES OPERATOR REMAIN IN ADJUSTMENT OF DECLUTCH MANUAL MODE WITH MOTOR TRIPPER MECHANISM IS NECESSARY RUNNING? (MP 710.3. CMP 703A2, OR CMP 703A3)

YESl l NO I

1r INSPECTION AND REPAIR OF ITEMS DOES HANDWHEEL TURN DURING LISTED IN STEP 4 5.3 IN THIS ELECTRICAL VALVE OPERATION 7 PROCEDURE IS NECESSARY. (MP 710.3. CMP 703A2. OR CMP 703A3)

YESl l NO I I 4 4 IS HARDENED GREASE PRESENT DOES VALVE RESPOND WHEN HANDWHEEL TURNS?

  • ON HANDWHEEL 7 YESl l NO YESl l NO I I h 1P 1r REMOVAL OF HARDENED GREASE IS DRIVE LUG INSPECTION DISAsstMBLY AND INSPECTION OF IS HANDWHEEL LUG AND CLUTCH AND LUBR; CATION IS NECESSARY. SATISFACTORY 7 ACTUATOR IS NECESSARY KEY INSPECTIONS SATISFACTORY 7 i (MP 710.3. CMP 703A2, OR CMP 703A3)

YESl lNO YES l l NO I l .

1P 1r HANDWHEEL LUBRICATION IS REPAIR OR HEPLACEMENI OF LUG REPAIR OR CLUTCH KEY <

DRIVE LUGS IS NECESSARY? IS OPERATOR A UMITOROUE NECESSARY. OPERA ~OR9 POSITIONING IS NECESSARY [

(MP 710.3, CMP 703A2 OR -

I YES l l NO ,

I 4 v PAIR OR INSPECTION AND REPAIR OR '

RE ON F E FOLLOWING IS NECESSARY (CMP 703A2, CMP 703A3):

FOLLO G S NE ESSARY (MP 710.3):

= DECLUTCH TRIPPER ,

= DECLUTCH SHAFT '

= CLUTCH SHAFT MP 710'13 Level of Use Rev. _,.

STOP THINK ACT REVIEW Information 39 of 39

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