ML20136H277

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Maint Procedure MP 1411.06, Preventive Maint for Type Smb & Smc Limitorque Valve Operators
ML20136H277
Person / Time
Site: Davis Besse Cleveland Electric icon.png
Issue date: 11/23/1985
From: Briden D, Daft C, Shawn Smith
TOLEDO EDISON CO.
To:
Shared Package
ML20136H086 List:
References
MP-1411.06, NUDOCS 8601090341
Download: ML20136H277 (15)
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MP 1411.06 Davis-Besse Nur: lear Poer Staticn

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thit Ib.1 Maintanar:ce Prrvwhire W 1411.06 Preventive Maintenance for Type Sm -M SIC Limitorque Valve Operators Record of Apprcral and Changes Prepared By Jim Imcr 9/12/85 Data suhaitted ay I.[ /a/s/Gr'

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b //77 ff Plant Manager 'Dats Revisicn SRB QA Plant Manager No. asocanandaticn Date Approved Data Approval Date 1

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8601090341 860103 PDR ADOCK 05000346 P PDR L

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l 1 MP 1411.06.0

1. PURPOSE '

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I 1.1 This procedure provides instructions f.or preventive maintenance l to be performed on limitorque operaters types SMB and SMC. '

1.2 Each limitorque operator will be sc'aeduled for preventive maintenance per the Preventive Naiutenance Program.

1.3 NOT all portions of this procedure will*be applicable for every preventive maintenance condition. Enter the symbol "NA" in the 1 ag licable blanks on the data and sign-off sheet as required.

1.4 Preventive Maintenance Sections 6.1 Mechanical Inspection and Lubrication Checks 6.2 Electrical Cleaning and Inspection 6.3 Electrical Motor Checks 6.4 Limit Switch Lubrication Check

2. RETERENCES 2.1 Limitorque Corperstien Limitorque Bulletin LC9, Maintenance Procedure Limitorque Bulletin SMB1-82C Limitorque Bulletin SMC1-04/03-83 Limitorque Bulletin SMC1-00 thru 2-85
3. SPECIAL EQUIPMDrT REQUIRED j MP 1410.33, Hegge Testing of Electrical Equipment Gasket material, Anchorite #425 or equivalent Electrical contact cleaner (CRC Lectra Clean or equivalent) i Lubricant, Holykote "G", or equivalent
4. PRECAITTIONS AND LIMITATIONS 4.1 Selected equipment covered by this procedure is safety-related and is included in the Station's Environmental Qualification (EQ) Program. Any discrepancies noted during the cond2ct of this procedure must be documented on the applicable Data Sheet and reported to the appropriate foressa and the EQ Coordinator for disposition.

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2 MP 1411.06.0 4.2 Safety Tagging Procedure, AD 1803.00, will be in effect and followed throughout this procedure.

4.3 TED Safety Procedures will be in effect and followed throughout

this procedure.

4.4 Jumper and Lifted Wire Control Procedure, AD 1823.00, will be in effect and followed throughout this prpcedure.

4.5 All leads will be bundled before closing limit switch cover to prevent crushing or breaking leads.

4.6 Observe proper radiation practices to limit personnel exposure, j ALARA. '

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4.7 Incompatible gresses may cause gresses to solidify, liquify or i produce toxic gases. Only the gresses specified in this procedure are to be used. Prior to adding any grease to the operator, ensure type of grease can be documented or else issue a correc-tive NWO to relube.

4.8 When replacing the covers on the geared limit switch, ensure the contact block is seated correctly on the frame.

i 4.9 Ensure gaskets are intact, all cover bolts installed, all pipe plugs

installed, and conduit fittings reassembled.

4.10 The limitorque operator has more than one source of power.

4.11 Requirements marked by (EQ) in the left margin are mandatory to ensure continuance of environmental qualification.

5. PREREQUISITES ,

5.1 A Maintenance Work Order has been issued.

6. PROCEDURE Unless specifically allowed by procedural steps, any deficiencies noted during performance of this procedure will be addressed by a

> corrective maintenance, NWO (Maintenance Work Order).

l i 6.1 Mechanical Inspection and Lubrication Check 6.1.1 Check for external' physical damage or abnormal conditions. Record findings on data sheet.

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a. loose, missing, or broken hardware l
b. loose conduit fittings
c. evidence of moisture or water on the actuator i
and valve sten l 1

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d. dirt or high dust concentration on the actuator and valve stes
e. surface corrosion ,
f. check area for water damage and intrusion of water into actuator (EQ) 6.1.2 Check "T" drains in motors where installed. Check that "T" drain is not blocked. Record finding on data sheet.

6.1.3 Remove the stem protection cover from the operator.

This may consist of a pipe plus in the housir g cover or a pipe and pipe cap arrangement.

6.1.4 Engage the operator in manual hand wheel and manually operate the valve in both the open and closed directions.

The operator should engage easily in the manual mode, operate freely without binding, and remain engaged in manual without further action from the operator.

Record findings on the data sheet.

6.1.5 Manually operating the valve as required, clean and lubricate the valve stem and stem nut. Check for burred or worn threads and that the stem nut is properly staked. Record findings on the data sheet, ,

i 6.1.6 Visually inspect operator for general condition and I leakage of lubricant from gasketed or o-ring sealed joints.

NOTE: Slight weepage of oil is normal.

Record findings on the data sheet.

6.1.7 Lubricate the zerk fitting in the housing cover, using Nebula EP-1.

6.1.8 Inspect grease in operator.

t NOTE: Each operator has at least two grease plugs

! on the main gear box compartment. Additionally there is a grease plug on the Motor Gear Bo2x compartment which is completely isolated from the main gear box compartment on some units.

CAUTION: Do not confuse the grease plugs with limit switch compartment conduit plugs.

1. Remove plugs from main and motor gear box housings.

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2. -U's'ing a suitable instrument remove a small amount of grease from each plug. Grease should be soft 4 to the touch, of even consistency, not show l

evidence of separation and adequately cover the gear sets. Should evidence of dirt, water or

. other foreign material be found provide a sample of the grease to Maintenance Engineering for evaluation. .

Record findings on data sheet.

3. Add Nebula EP-1 if required to ensure proper grease level in the operator.

I i 4. Reinstall plugs removed for inspection.

l 6.1.9 Reinstall stem protector removed in Step 6.1.3.

6.2 Electrical _ Cleaning and Inspection i

NOTE: This inspection is to be to the maximum extent possible  :

i without removal of limit or torque switches.

l 6.2.1 Remove the limit switch compartment cover. On type SHC units also remove the torque switch compartment cover. Should moisture be evident, dry the compartment and components. .

(EQ) 6.2.2 Inspect wiring, terminals and contacts to the maximum extent possible. Check all terminal connections for tightness and check frayed wiring. Clean all electrical controls and contacts by wiping with electrical type contact cleaner (CRC Lectra Clean or equivalent). .

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Record findings on data sheet. -

NOTE: IT corrective action requiring removal of the limit switch is required perform Section 6.4 concurrently with corrective action.

6.2.3 Inspect areas around Itnit switch and torque switch mounting plates for evidence of oil / grease leakage. A slight amount of weepage is satisfactory. Record findings on data sheet.

(EQ) 6.2.4 Inspect the switch block and switch rotor assea'o lies of torque switches for cracks, surface checking or evidence of brittleness. Inspect the can-striker hub for erosion by looking between the dial and strike hub with an inspection mirror.

6.2.5 Check and record torque switch setting.

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t 1) 6.2.6 Inspect the switch block and rotor assemblies of limit switches for cracks, surface checking or evidence of brittleness. Inspect the rotor for evidence of cracking where the rotor mounts on the metal shaft with groove pin. Inspect for worn rotor end.

(EQ) 6.2.7 Check and record the color of the torque and limit switches. Check and record type of limit switch gear box (br, ass or aluminum).

6.2.8 Clean gasketed surfaces and inspect cover o-rings and gaskets as required. Replace gaskets or o-rings if damaged. Record findings on data sheet.

l 6.2.9 Replace limit switch compartment cover and torque switch compartment cover (type SMC only).

6.3 Electrical Motor Checks (EQ) 6.3.1 Megger check limitorque operator motor. Record findings on data sheet.

NOTE: One HEG-0EM or better is considered normal.

6.4 Switch I.ubrication Check (Type SMB)

NOTE: It may be possible to check the lubricant in a two l

train limit switch without its removal from the

, operator. In this case perform only the applicable j steps of this procedure.

.I l 6.4.1 To remove limit switch for inspection proceed as follows:

j 1. Verify valve in either full open or closed position.

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2. Note the position of contacts 1, 5, 9' and 13 as required.
3. Turn the set rod clockwise until it stops. DO NOT FORCE. This disengages the rotor gearing mechanism.

CAUTION: Do not change valve position or rotor position during the remainder of Section 6.4.

6.4.2 Remove limit switch cover and electrical leads as required.

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6 MP 1411.06.0 6.4.3 Remove two screws holding the limit switch gear box i bayonet flange to the operator housing. Remove the -

limit switch for the operator.

6.4.4 Remove the limit switch gear box cover plate and gasket.

(EQ) 6.4.5 Inspect the grease. It should be soft and of even consistency and adequately cover gears. If any water, dirt or other foreign substance is evident in the grease contact Maintenance Engineering. Record results on data sheet.

6.4.6 Reinstall gear box cover. Use new gasket if required.

Ensure the cover is properly seated on gear box frame.

NOTE: IF limit switch is two train unit. proceed to step 6.4.12. IF limitorque limit switch is a four train unit further disassembly is required. Proceed to Step 6.4.7.

6.4.7 Remove two screws holding each limit switch gear box to four train cartridge gest box.

6.4.8 Remove both limit switch sear boxes from cartridge gear box and perfota Steps 6.4.3 thru 6.4.5 on the ,

second gear box, Record results on data sheet.

6.4.9 Remove fov/f allen head cap screws from cartridge gear box cover and remove.

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(EQ) 6.4.10 Inspect grease using same criteria as in Step 6.4.4.

Record the results on data sheet.

6.4.11 Reinstall limit switch sear boxes on cartridge sear I box using screws removed in Step 6.4.6.

6.4.12 Reinstall gear box bayonet in operator housing and screws removed in Step 6.4.2. .

6.4.13 Reconnect electrical leads and limit switch cover.

6.4.14 To return a limit switch to service, proceed as follows:

1. Turn the set rod counterclockwise until it stops. DO NOT FORCE. This re-engages the rotor gearing mechanism for normal operation.
2. - Verify that you cannot move the intermittent gest shafts with a screwdriver.

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3. Verify that rotors have not changed position. i 6.5 operability Check 6.5.1 Ensure all parts are installed and valve is ready for operability check.

6.5.2 Cycle valve electrically and, monitor and record motor current and voltages.

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8 MP 1411.06.0 )

PREVENTIVE MAIN'IT. NANCE (PM)

Data Package for HOV A. General Information Operator Type / Size /

Serial Number Order Number MWO Number External Condition: SAT UNSAT T-Drain Installed SAT UNSAT

& Clear

.i B. Manual Handwheel Operations SAT UNSAT Seal Condition: SAT UNSAT Remarks:

. C. Clean & Lubricate Valve Stes and Stem Nut Stes Nut Staked: Yes No Thread Condition: SAT UNSAT Remarks:

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D. Lubrication of Main and Motor Gear Box Amount: _ SAT. UNSAT Quality: SAT UNSAT i

Remarks:

. t E. Electrical Inspection l Contact Cor.dition: SAT UNSAT l Genesal Condition: SAT UNSAT Torque Switch Setting:

Switch Colors:

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9 MP 1411.06.0 Geared Limit Switch Material Limit SW and Torque SW 0-ring Condition: SAT WSAT Gasket or 0-ring Condition: SAT _ WSAT i l

Remarks:

F. Electrical Motor Checks Megger Check Value:

G. Limit Switch Lubrication Type: Two Train Four Train Lubricant Condition: SAT WSAT Completed by Date H. Operability Check Motor Current: aspe 1

Motor Voltage: volts Valve Operation: SAT WSAT Remarks:

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10 MP 1411.06.0 DATA AND SIGNOFF SHEET

1. Procedures and attachments have been verified with the control copy.

Verified Date -

2. All notes, cautions, precautions, and limitations have been read and understood.

Verified Date

3. The following sections of the procedure were performed and verified as complete.

Verified Date Verified Date Verified Date Verified Date

4. The Shift Supervisor has been notified that work is complete and the system has been restored as directed by the Shift Supervisor.

. ; ... C Verified Date ', .- 7

5. The data sheets have been reviewed by the Maintenance Engineering staff.

Verified Date l

END Page 1 of 1

QUESTION NO. 7D How many delta P's will be used for single-valve assembly?

RESPONSE TO QUESTION NO. 7D A single delta P test will be performed using the worst case achievable i differential pressure on the valves specified in our in-situ test plan contained in Toledo Edison Response to NRC Evaluation and Staff Position Regarding Operators for Valves AF 599, AF 608 and Ms 106, Plans 12

and 27 and Other Motor Operated Safety Related Valves as submitted November 16, 1985 (Serial No. 1208). A copy of the Toledo Edison response
is attached to Question No. 5.

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QUESTION NO. 8 For 7 above, how many of these actions will be applied to all safety-related valves?

i RESPONSE TO QUESTION NO. 8 j '

, Toledo Edison response to Question No. 7 applies to all safety related valves, as qualified in the response.

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QUESTION NO. 9 Should LCTS Nos. 1261 and 1273 also state "to preclude damage to the valve"?

, RESPONSE TO QUESTION NO. 9 The Licensing Commitment Tracking System (LCTS) numbers referenced in this question are Toledo Edison designations for managing and tracking various action items internal to the company. This information was submitted to the NRC in Revisioa 4 to the Course of Action document (Toledo Edison letter dated November 16, 1985, Serial No. 1208), and designated for

! informational purposes only.

Toledo Edison does wish to clarify, however, that the setting of the

" torque switch to the maximum in the open direction" referenced in LCTS Nos. 1261 and 1273 is per the manufacturer's definition as discussed in the response to Question IB.

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QUESTION NO. 10 How often are these valves tested cod what types of tests are performed?

(IST Program, Technical Specifications, other)

RESPONSE TO QUESTION NO. 10 The periodicity valves, to be tested, and type of test to be performed are as outlined in our response to Question No. 7B and in Toledo Edison's ASME Section XI In-Service Testing Program, which encompasses surveillance tests. The In-Service Testing program is currently under review to enhance the testing requirements of the ASME Code. The results of the review will be forwarded when the review is completed. Any modifications to valve testing frequency that result from the review will be handled under the In-service Inspection Program, and the Preventive Maintenance Program. Additionally, Motor Operated Valve Analysis and Testing System (MOVATS) testing subsequent to repairs and modifications shall be performed and documented under the controls of AD 1844.11, " Post Maintenance Testing Requirements" (attached).

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