ML17216A667

Rev 4 to Maint Procedure 2-2200062, 2A Emergency Diesel Electrical Insp.

ML17216A667
Person / Time
Site:	Saint Lucie
Issue date:	03/26/1986
From:	Barrow J FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17216A664	List: ML17216A663 ML17216A665 ML17216A666 ML17216A667 ML17308A256
References
2-2200062, NUDOCS 8608190299
Download: ML17216A667 (24)

Text

Page 1 of 14 FLORIDA POWER & LIGHT COMPANY ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE N -2200062 REVISION 4 paI g fNFQHMATIQI ts document is QNLV g p TITLE: ..: v ' not controlle ion with,o controlled d ocumen 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 2.0 REVIEW AND APPROVAL:

Reviewed by Facility Review Group A ril 25, 1983 Approved by J. H. Barrow (for) Plant Manager June 20, 1983 Revision 4 Reviewed by F R G -p 0 19~

Approved by n ~ant 1

Manager 9 519

3.0 PURPOSE

This procedure provides instructions for the Electrical Inspection and on going equipment qualification of the 2A Emergency Diesel.

4.0 PRECAUTIONS AND LIMITS:

4.1 As per the Technical Specifications, the sequence of switching and valving is at the discretion of the NPS/ANPS.

4'2 Use safety precaut'ons when meggering generator.

4.3 This procedure is to be conducted concurrently with Operating Procedure 2-0400050, "Periodic Integrated Test of Engineered Safety Features." /R4 5.0 RELATED SYSTEM STATUS:

As per the Technical Specifications ~

I S 2 OPS I

!DATE iDOCT PROCEDURE IDOCN 2:2200062 ISYS

)COMP COMPLETED

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Page 2 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION

6.0 REFERENCES

6.1 Unit II Technical Specifications 3.3.3.5, 3.8.1.1, 3.8.1.2, 3.8.2.2, Unit II Surveillance requirements 4.8.1.1.1, 4.8.1.2, 4.8.2.2, 4.3.3.5.1, 4.3.3.5.2.

6.2 Administrative Procedure No. 0010432, "Plant Work Orders" ~

6.3 Operating Procedure No. 0010122, "In"Plant Equipment Clearance Orders".

6.4 Administrative Procedure No. 0010430, "Maintenance on Class I Systems".

6.5 QI 13-PR/PSL-2, "Cleanliness Control Methods" ~

6.6 Power Systems Diesel Manual - 2998-7435, Chapter 17, Sections 5.1 through 5.6, 5.7.2, and 10.

6.7 FPL Safety Rule Manual.

6.8 Maintenance Procedure No. 0920062, "Grounding or Testing of High Voltage (4.16 or 6.9 KV) Motors".

6.9 Doble Insulation Test, Form 3946 '

'0 QI 11-PR/PSL-3 ~

6.11 Nuclear Environmental Qualification Program for Diesel Generator Units, Section 5. /R4 8.0 7.1 7.2 A signed shall be off entries'R4 copy of Section 9.0 of this procedure attached with PWO retained as QA records in accordance with QI 17-PR/PSL-1.

Normal switching order log MATERIALS AND EQUIPMENT REQUIRED:

8.1 Real time analyzer and associated equipment, or equivalent.

8.2 Megger and Simpson 260 or equivalent.

8.3 Lifting equipment (chainfalls, slings, comealongs, etc) ~ /R4 8.4 Electrician handtools. /R4 8.5 Variable AC source 0-150V 60 HZ.

8.6 Wrenches, sockets.

8.7 Rags.

Page 3 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062$ REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 8.0 MATERIALS AND EQUIPMENT RE UIRED: (continued) 8.8 Air dryer.

8.9 Vacuum cleaner.

8.10 Scotch brite pads, contact cleaner.

8.11 Form 3946.

8.12 Frequency Meter.

8.13 Eight Channel, Chart Recorder /R4 8.14 Two Channel Chart Recorder /R4 8.15 Fluke V.O.M. with clamp-on and temperature probe attachments /R4 8.16 Volt. Frequency and amperage transducers /R4

Page 4 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 9.0 GENERAL INSTRUCTIONS:

THE ENTIRE "GENERAL INSTRUCTIONS" SECTION OF THIS PROCEDURE HAS BEEN RE-WRITTEN NOTE All items with

• designate ongoing environmental qualification of equipment. These readings and/or information should be corn ared with ori inal test data.

9.1 Prior to plant shutdown (18 mo.) install temporary chart recorders and/or instruments to monitor diesel output for ECCS test procedure 2-0400050.

LOCATION MONITOR INIT/DATE Diesel Control CAB Gen. Voltage Gen. Frequency VMR Dry Contact FMR Dry Contact 2A3 4160 V SWGR Gen. Amperes

• Diesel Generator Stator Temperature (Request I&C Department to make this" set up)

NOTE See attached drawings for termination details of above items.

9.2 During ECCS test observe diesel start at diesel control cabinet. Verify proper speed light sequence.

9.3 Obtain start time from operations "Sequence of Events" recorder. This is done by subtracting initiation of test time from diesel output breaker closure time.

Time Seconds 9.4 During the diesel run of the ECCS test, after load has been stabilized, record the following information:

1. Vibration Si nature Using "Snapshot" or equivalent equipment, take a vibration signature of the generator bearings and attach a copy of it to this procedure.

2. Generator S tator Tem erature Record the average stabilized temperature of those taken in Step 9.1. /

4 J Page 5 of 14 ST. LUCIE UNIT,2 MAINTENANCE PROCEDURE NO+ 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 9.0 GENERAL INSTRUCTIONS: (continued) 9.4 (continued)

INIT/DATE

3. Generator Bearin Tem eratures After 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of running at rated load, use a hand held temperature probe on bearing housings and record 16 Cyl 12 Cyl

4. Ambient Air Tem erature Record ambient air temperature in diesel room, and air entering the generator.

Room Temp. F Intake Gen. Temp. 'F

5. Field Current Using a clamp on ammeter on secondary side of C.T.

for field current, record stabilized field amps at rated load on generator.

Amps

6. Neutral Current Using a digital Fluke voltmeter, measure the voltage drop across the grounding transformer resistor at TB 4-20 and TB 4-31

'olts Calculate neu tra 1 cur rent I ~E/R R ~ 1.34 ohm Neutral Amps 9.5 At the end of the ECCS run of the diesel, have Operations unload diesel and open the output breaker.

1. Check operation of the voltage regulator in local and remote. Verify voltage control between 4000 VAC and 4300 VAC.

Remote Local Auto Local Remote

2. Observe operation of governor controls. Check for smooth operation by varying speed control between 58 Hz 62 Hz.

Remote Local

Page 6 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 9.0 GENERAL INSTRUCTIONS: (continued)

INIT/DATE 9.6 At the end of one (1) hour run, request a clearance on "2A Diesel" ~ Clearance should include the following:

1. Breaker 2-20211 (2A3 4160 V Bus) - Racked out.

2. Remote Control Switch (On Load Panel) Isolate.

3. 125V DC Bus 2A CKT 37 CWD 1608.

4. MCC 2A7 Breakers 2-41407, 2-41408, 2-41409, 2-41411, CWD 1120, 1121, 1607.

5. 125V DC Bus 2A CKT 22.

6. Voltmeter and wattmeter for 2A diesel on HSCP should be removed and calibrated at this time.

9.7 Remove breaker 2-20211 from cubicle. Ground generator per "Grounding and Testing" Procedure No.. 0920062.

9.8 Pull Generator PT fuses. Remove leads off grounding transformer in Generator Control Cabinet. Remove cables off lighting arrestors.

Verified NOTE Prior to performance of Steps 9.9, 9.10, 9.12 discuss with electrical su ervisor. ll

• 9..9 Megger at 5000 V and Doble Diesel Generator from gxound device. Ensure proper safety rules are adhered to.

Record Doble readings on Form 3946, megger readings/

polarization index on Form 2210.

• 9.10 Record D.CD leakage cuxrent with 1.7 P.U. rated voltage stress (7072 volts) on stator windings.

• 9.11 Record winding resistance on stator and rotor Stator Rotox'.12 Record bearing insulation resistance or leakage current.

Ohms Amps 9.13 Ground generator with grounding device.

Verified

Page 7 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 9.0 GENERAL INSTRUCTIONS: (continued)

INIT/DATE

• 9.14 Remove end bell screens and make the following inspection:

1 ~ Inspect brushes for wear and correct seating and spring tension. Notify Foreman/Supervisor when inspecting.

2. Inspect inside of generator for any unusual conditions. Cleanliness, oil leak, etc. Notify Foreman/Supervisor of any abnormalities.

9.15 Blow out generator with dry air, and wipe down with clean, lint-free rags.

9.16 Replace end bell screens after inspection and cleaning.

Clean all surfaces.

• 9.17 Inspect generator lead box. Inspection should include:

loose connections, deterioration of wires, taping of leads, etc. Clean insulators and vacuum cabinet.

9.18 Inspect control cabinets'nspection should include:

Check tightness of all connections, visual inspection of relays, switches, and wiring. Remove fuses and clean with scotch brite pads. Change out deteriorated cabinet. fuses'acuum

1. Inspect voltage regulator cabinet. Check for loose connections and visually inspect components'acuum cabinet.

2. Check transformers and CT's and cables. Clean insulators. Vacuum cubicle. Tighten connections.

NOTE Notify Foreman/Supervisor of any abnormalities. Note on PWO any findings.

9.19 Megger generator from ground device. Record megger readings on form 2210.

Readings should be greater than or equal to readings taken in Step 9.9.

9.20 Change governor hydraulic actuator oil on both engines with N-100 oil. Fill to specified level on actuator sight glass. Follow Section 12 of Tech. Manual "Centrifugal Governor Compensation," to vent air out of actuators during run.

Page'8 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 9.0 GENERAL INSTRUCTIONS: (continued)

I CAUTION IF VENTING PROCEDURE IS NOT FOLLOWED, OVERSPEED OF ENGINE COULD RESULT.

NOTE Steps 9.21, 9.22, 9.23, and 9.24 will be performed with an electrical en ineers direction.

INIT/DATE 9.21 Select (10) ten relays from the following list and isolate'r remove from the circuit to perform the tests required.

l. Operate the relays for 10 cycles before taking measurements. Apply a 100 ma load through the contacts and measure the voltage drop. If any of the 10 relays has a resistance g'reater than 100 milliohms, replace that relay and perform this test on all KPD-13 relays in the panels. Replace all having contact resistance greater than 100 milliohms.

2. Measure the coil resistance of the 10 relays. If the value is outside the range of 5885 to 7195 ohms, replace that relay and perform this test on all KPD-13 relays in the system.

3. Using a 500 volt megger, check the insulation resistance of the 10 relays't should be greater than 10 megs at 500V. If any relay is less than 10 megs, replace that relay and perform this test on all KPS-13 relays.

4. Visually inspect all 10 relays. Note the appearance and record any noticeable changes, (burned contacts, brittle housing, etc.) ~ Contact the manufacturer for evaluation of these changes.

5. Perform the above tests on all Square D Contactors in the system.

I+

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Page 9 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 9.0 GENERAL INSTRUCTIONS: (continued)

INITIAL 9.22 Agastat Timing Relays 1 ~ Measure and record the time delay. If this value changes from the initial value by more than +30X, replace the relay.

2. Measure and record the D.C. resistance of the coil. The value must be between 1710 and 2090 ohms. If the value is not within this range, replace the relay.

3 ~ Measure and record the contact resistance. If the contact resistance is above 150 milliohms, replace the relay. Operate the relay for 10 cycles prior to taking this reading.

TIME COIL CONTACT DELAY RESISTANCE RE SI STANCE REQUIRED DEVICE TIME ACTUAL TDV TDY TDSX TDl TD3 TD5 TD8 9.23 Wilmar Electric Devices for frequency and voltage monitoring.

1. Isolate the relays from the circuit.

2. Operate the relays for 10 cycles, then measure and record the contact resistance. If greater than 100 milliohms, replace the relay.

Frequency m ohms Voltage m ohms

3. Measure and record the coil resistance. If this value changes from the initial reading by more than +10K, replace the relay.

Frequency Coil Voltage Coil

4. Visually inspect the relays and record their condition.

(~ ~a '

Page 10 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION 9.0 GENERAL INSTRUCTIONS: (continued)

INIT/DATE 9.24 10-Year Test of General Electric SIS Wire.

NOTE Six wire test specimens are included in the engine control anel.

1. Insulation megger test must be greater than 500 megohms.

Test Specimen No.

2. Hi-Pot Test Test Specimen No-

3. Visual Inspection Test Specimen No.

A decrease of the insulation resistance below 50 megohms, failure of the Hi-Pot Test or significant degradation of the wire detected by visual inspection requires the condition of the system wiring be evaluated by the manufacturer.

TEST SPECIMEN TEST SCHEDULE On Installation In 10 years (1990)

In 20 years (2000)

In 30 years (2010)

Spare Spare 9.25 Replace leads on grounding transformer and PT fuses and lighting arrestors. Take grounding device out of cubicle.

Replace breaker in cubicle.

9.26 Release clearance, notify Operations diesel is ready for functional test. Obtain permission to conduct one (1) hour load test and do Section 9.1 VMR and FMR Monitoring. /

9.27 At the end of final test and satisfactory results, remove all monitoring equipment and notify Operations diesel is ready for service.

9.28 Clean up areas of work. Put tools and equipment away.

Completed by:

Verified by (Foreman):

Reviewed by (Supv.):

~ El

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Page 11 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION DEVICES IN ENGINE CONTROL PANEL TEST CONTACT COIL INSULATION VISUAL DEVICES YEAR RESISTANCE RESISTANCE RESISTANCE INSPECTION Rl 1984 R1X 1984 RlX1 1984 R1X2 1984 R9 1984 R9X 1984 AV1A 1984 AV1B 1984 AV2A 1985 AV2B 1985 SDR 1985 SDRX 1985 SDRX1 1985 SDRX2 1985 LA 1985 LB 1985 RA 1986 RB 1986 R2 1986 OTA 1986 OTB 1986 BF1 1986 BF5 1986 BF6 1986 BF7 1984 BF8 1985 FFP 1984 (CONTACTOR)

Page 12 of 14 ST. LUCIE UNIT 2 MAINTENANCE PROCEDURE NO. 2-2200062, REVISION 4 2A EMERGENCY DIESEL ELECTRICAL INSPECTION DEVICES IN RELAY PANEL TEST CONTACT COIL INSULATION VISUAL DEVICES YEAR RESISTANCE RESISTANCE RESISTANCE INSPECTION I IR 1984 1984 Ka 1985 UC 1985 1

UD 1986 I OTS 1986 I

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ST. LUCIE UNIT 2 Page 13 of 14.~

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