ML20204F512
| ML20204F512 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 11/21/1985 |
| From: | Booker S, Huff A, Miller W DETROIT EDISON CO. |
| To: | |
| Shared Package | |
| ML20204F025 | List: |
| References | |
| 35.000.54, NUDOCS 8703260209 | |
| Download: ML20204F512 (15) | |
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SR Safety Classifscation FERMI 2 PROCEDURI - MAINTENANCE 24/48 VDC ELECTRICAL SYSTEM _-
TITLE: CMERAL MAINTENANCE
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, PROCEDURE NUMBER: 35.000.54 [
REVISION: 4 Wac:e of preparer: Allen J. Huff Technically reviewed by: John J. Lacroix /s/ Date:11/08/85 Reviewed / concurred by: W. E. Miller /s/ Date:11/13/85 Supv - Operational Assurance Approved by: Stephen J. Booker /s/ Date:11/13/85 Responsible Section Head or OSRO Member / Alt Turther Approval Required for Safety-Reisted or Superintendent-Designated Procedures:
Recomended by: R. S. Lenart /s/ Date:11/13/65 OSRO Chairman / Alternate Approved by: R. S. Lenart /s/ Date:11/13/85 Superintendent - Nuclear Production The following approved Procedure Change Requests are incorporated in this revision:
T2878 This revision l 1 does IXl does not constitute periodic review.
ARMS.INFORMATION S TEMS DSN M _ M >[, 1 DTC PAGE WMM N, ,.- f._
REv., PIS .~
NOV 211985 PlS ---
RECIPIENT
. .. ..,,, . m -t NO, 8703260209 870317 PDR ADOCK 05000341 P PDR
F 35.000.54
" R2v. 4 TABLE OF CONTENTS fagg 1.0 Purpose.......................................... 1 2.0 Location......................................... 1 3.0 References....................................... 1 4.0 Required Equipment............................... 2 5.0 Precautions and Limitations...................... 3 6.0 Prerequisites.................................... 3 7.0 Procedure........................................ 4 7.1 Isolation of the Ba ttery. . . . . . . . . . . . . . . . . . . . 4 7.2 Clean and Inspect the Battery............... 5 7.3 Clean and Inspect the Battery Rack. . . . . . . . . . 6 7.4 Clean and Inspect the Cabinet Door.......... 6 7.5 Megger the Distribution Cabinet............. 7 7.6 Restoration of the Distribution Cabinet..... 8 7.7 Reinstall the Battery Bank.................. 9 7.8 Reconnect t h e Ba t t e ry Ba nk . . . . . . . . . . . . . . . . . . 9 7.9 Restoration................................. 10 ENCLOSURES Temporary Battery Wiring Diagram. .(111385) . . . Enclosure 1 ATTACHMENTS Maintenance Data Sheets..(111385)........... Attachment 1 100/PH1/2.0 111685 1
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35.000.54
- 12v. 4 Page 1 1.0 Purpose The purpose of this procedure is to provide the instructior.s for the general maintenance of the 24/48 V de electrical distributton cabinets and 24/48 V de batteries.
If the complete procedure is not required, use only those s teps which are applicable.
This procedure implements Licensing Commitmert 1371.
2.0 Locations 2.1 The electrical distribut.;on cabinets 215-1 and 21A-1 are located in the auxiliary building, on the third floor, by column G-11.
2.2 The 24/48 V de battery No. 21B is located in the auxiliary building, on the third floor, in the Division II Battery Room, on the east side of column 12-F.
2.3 The electrical distribution cabinets 2181-3 and 21Al-3 are located in the auxiliary building, on the second floor, by columns F-14 and F-16 respectively.
2.4 The 24/48 V de battery No. 21A is located in the auxiliary building, on the third floor, in the Division I Battery Room, on the south side of column 12-F.
3.0 References
- 3.1 Plant Operations Manual (POM) Procedure 12.000.15, "PN-21 (Work Order) Processing."
- 3.2 POM Procedure 12.000.25, Temporary Modification Procedure." k 3.3 POM Procedure 31.000.02, " Maintenance Record System."
3.4 POM Procedure 31.000.04, " Control of Calibrated Maintenance Test Equipment."
3.5 MI-M055, "Boltting and Torquing Guidelines."
- 3.6 POM Procedure 12.000.80, " Conduct of Electrical Pield Activities."
3.7 A30-00-0-000-JA, "EF-2 Lubrication Manual."
3.8 Licensing Commitment 1371.
- Denotes "Use" Reference
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35.000.54 R2v. 4 Page 2 i 3.9 Deco Drawing 6SD721-2530-17, Rev. 1 3.10 Deco Drawing 6SD721-2531-14, Rev. D 3.11 DECO Drawing 6E721-2833-2, Rev. D 3.12 DECO Drawing 6E721-2833-10, Rev. D 3.13 Square D Electrical Equipment Manual (R32000S-900-JA004) 3.14 C & D Batteries Divison Manual (R 3200S003 SG 001) 4.0 Required Equipment The estimated manpower required to perform this procedure is specified on the Maintenance Planning Sheet.
4.1 Tools 4.1.1 The following tools are required to perform this procedure:
- 1. General ha'ndtools
- 2. 0-500 V de Megger
- 3. Mulitneter (ohms - volts)
- 4. Vacuum
- 5. 50 ft. extension cord
- 6. 35 psi air regulator (dryer)
- 7. Valved whip and nozzle for air
- 8. Lint-f ree rage
- 9. Wire brush
- 10. Temporary Betteries 4.2 Mate isis 4.2.1 The following materials, or their approved equivalent, are required to perform this procedure.
- 1. Isopropyl Alcohol
- 2. NO-0X-ID Grease
- 3. Amosol #395 HF
35.000.54 Rsv. 4 Page 3
- 4. CRC Contact Cleaner No. 2016
- 5. Approved neutralizing agent
- 6. L.O.C. detergent 5.0 Precautions and Limitations 5.1 All determinations / terminations of electrical connections required in the performance of this procedure shall be done in accordance with Reference 3.6.
5.2 Only Operation's personnel as directed by the Nuclear Shif t ~
Supervisor or his delegate are allowed to energize /de-energize electrical equipment.
5.3 Verify that the equipment is properly grounded and that the static charge is discharged to ground.
5.4 Do not segger solid state circuits to ground.
5.5 Prior to applying test potential, ensure that all personnel are clear of the electrical panel being tested.
5.6 Following seggering of electrical busvork, etc., discharge that component to ground until the potential voltage buildup from maggering is dissipated to ground.
5.7 Damaged or worn parts shall be replaced with approved components and then recorded on Attachment 1.
5.8 All tools for tightening connector bolts shall have insulated handles.
5.9 Ensure that the battery room ventilation system is operating.
5.10 DO NOT use solvents, detergents, cleaning compounds, oils, waxes, or polishes on the plastic containers or battery covers.
l 5.11 Any time it becomes necessary to remove or transfer any or all battery leads, special precautions must be taken to prevent these leads from coming in contact with one another. If the leads are to be removed presanently for maintenance, each lead will be insulated and separated from each of the other leads.
6.0 Prerequisites 6.1 The Nuclear Shif t Supervisor has been notified concerning the maintenance activity that will be performed and the subject equipment has been released for this procedure in accordance with Reference 3.1.
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u 6.2 The work leader assigned responsibility for performing this procedure has reviewed the work plan and understandin of the total job. He shall sign the Data Sheet's " Prerequisites Met" slot (Attachment 1) to document this understanding, and that all other prerequisites have been met.
6.3 This procedure is intended to cover only one de distribution cabinet and one 24/48 V de battery. If more than one cabinet or battery is to have maintenance performed on it under One Job Order additional Maintenance Data Sheets must be attached.
7.0 Procedure 7.1 Isolation of the Batteries NOTE: Any time it becomes necessary to remove any or all battery leads, special precautions must be taken to prevent these leads from coming in contact with one another. If the leads are to be removed permanently for maintenance, each lead will be it.sulated and separated from each of the other leads.
7.1.1 Wire the temporary 12 volt batteries to provide 24 and 48 volts as shown in Enclosure 1.
7.1.2 Verify that position 4 in the distribution cabinet (21A-1 for battery 21-A or cabinet 21B-1 for battery 21B) is in the "0FF" position. If the position is not in the "0FF" position, notify operations and have then 1
place it in the "0FF" position.
7.1.3 Connect the positive (+), Neutral (N) and Negative cables (-), from the temporary batteries to the (+),
(N), and (-) lugs respectively in position 4 of the distribution cabinet (cabinet 21A-1 for battery 21A or cabinet 21B-1 for battery 21B).
7.1.4 Verify that all of the fuses and links fit securely in their fuse clips. Replace any bad fuses or links.
7.1.5 With the 60A fuses securely in place, have Operations place position 4 of the distrbution cabinet (cabinet i
21A-1 for battery 21A or cabinet 215-1 for battery 215) in the "0N" position. This parallels the temporary battery bank with the battery.
7.1.6 Bave operations place the distribution cabinet's main position in the "0 PEN" position and remove both of the 100 amp fuses and the link. The batteries are now isolated.
35.000.54 12v. 4 Page 5 7.2 Clean and Inspect the Batteries 7.2.1 Determinate the battery cables (No. 204682A, B and C-IP for battery 21A or No. 204685A, B and C-2P for battery 21B).
7.2.2 Remove all intercell connection links (and bolts) and move them to a suitable cleaning location.
7.2.3 Clean the bolts, nuts and washers with a suitable neu-tralizing agent and L.O.C. detergent. If desired, a wire brush caa be used on the stainless steel nuts and bolts.
7.2.4 Remove the batteries from their rack and place them on 2 wooden surfaces for cleaning.
CAUTION Do not set batteries directly on a concrete floor as this could cause structural damage if they are dropped.
7.2.5 Inspect the batteries' exterior surf aces for signs of electrolyte or corrosive acid buildup. If electrolyte or acid deposits are present, remove them by:
- 1. Neutralizing the deposit with a cloth containing a moist solution of an approved neutralizing agent.
- 2. Continue to apply fresh solution until the
" fizzing" stops. Then, remove all traces of the solution by wiping the batteries' surfaces with a water moistened cloth.
7.2.6 Using a small wire brush and the neutralizing solution, clean the battery terminal posts by removing the corrossion and oxidation.
.2.7 When the " fizzing" stops with the application of fresh solution, finish the cleaning with listilled water.
When the cleaning is complete, dry the battery posts with a clean dry cloth.
7.2.8 Clean and inspect the connecting jumper and power cable lugs with the neutralizing solution and a distilled water rinse. If desired, the small wire brush can be used in cleaning these parts. Replace any jumper and power cable lugs that are damaged.
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- 35.000.54 R2v. 4 Page 6 7.2.9 Inspect the batteries for leaky cell jars, hairline cracks, or other physical damage.
NOTE: The Maintenance Foreman shall notify the HTC immediately if any damage is found. The MTC will provide additional instructions as necessary.
7.3 Clean and Inspect the Battery Rack 7.3.1 Using a solvent or cleaning compound, clean the battery rack as necessary. Do NOT use a wire brush on painted CAUTION Do not allow solvents or cleaning compounds to come in contact with any of the plastic surfaces (see Section 5.10).
7.3.2 Clean the battery hold down clips using the same method used in step 7.3.1.
7.3.3 Using a water moistened cloth, remove any remaining loose particles, solvent, cleaning compound, residue or film.
7.3.4 Ensure that all battery rack bolted connections are tight. Tighten any loose bolts.
7.4 Inspect and clean the Distribution Cabinet.
7.4.1 Open the cabinet door.
7.4.2 Unbolt and remove all of the front panel covers.
7.4.3 Ensure that all of the buses are de-energized by testing them with a Voltaeter.
7.4.4 Open all of the fusible panelboard doors.
7.4.5 Remove all of the fuses from each fusible paneltsard.
7.4.6 Clean each fusible switch enclosure.
7.4.7 Clean all of the bus barriers and inspect then for discoloration and/or hair line cracks.
7.4.8 Clean all of the blade insulator covers.
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7.4.9 Check all of the nuts, screws, and bolts for tightness.
7.4.10 Clean the switch mechanism cover.
7.4.11 Clean all of the fuse clips.
7.4.12 Inspect each fuse clip for discoloration, pitting, corrosion, etc..
7.4.13 Document the general condition of all the fuse clips on Attachment 1.
7.4.14 Clean the Switch Mechanism.
7.4.15 Inspect the face of the bail assembly for pitting, corrosion, or dirt.
7.4.16 Hanually operate the Switch Mechanism to check for mechanical binding.
7.4.17 Lubricate the operating parts of the Switch Mechanism with NO-0X-ID grease (if needed), apply the lubricant sparingly.
7.4.18 Repeat steps 7.4.14 through 7.4.17 for each remaining switch mechanism.
7.4.19 Record the general condition of all switch mechanisms on Attachment 1.
7.4.20 If possible, check all bus work connections for tightness.
7.4.21 Inspect the bus bar insulators for hairline cracks, discoloration, etc.
7.4.22 Document the general condition of the distribution cabinet on Attachment 1.
7.5 Megger the Distribution Cabinet 7.5.1 Using a 500 VDC magger, ground one (1) test lead and attach the other test lead to the positive bus bar.
35.000.54 12v. 4 Page 8 s
NOTE: Verify that all of the switches are in the "0N" position.
7.5.2 Negger the bus bar to ground for one (1) minute or until the reading stabilises and record the resistance reading on Attachment 1. If the reading is not within the limits specified on Attachment 1, the Maintenance Foreman shall notify the Maintenance Technical Coordinator (MTC). The MTC will provide additional instructions as necessary.
7.5.3 Discharge the potential voltage buildup on the bus previously neggered to ground.
7.5.4 Repeat steps 7.5.1 through 7.5.3 for the remaining two (2) buses.
7.5.5 Connect one (1) magger test lead to the negative (-)
bus bar and attach the other test lead the neutral bus bar.
7.5.6 Hegger the bus bar to ground for one (1) minute or until the reading stabilises and record the resistance reading on Attachment 1. If the reading is not within the limits specified on Attachment 1, the Maintenance Foreman shall notify the MTC who will provide additional instructions as necessary.
7.5.7 Discharge the potential voltage buildup on the bus previously seggered to ground.
7.5.8 Repeat Steps 7.5.5 through 7.5 7 for the remaining two (2) possible bus-to-bus combinations.
7.5.9 temove the megger test leads.
7.5.10 Heasure the temperature of the cabinet enclosure with a thermometer, and record the reading on Attachment 1.
7.6 Restoration of the Distribution Cabinet NOTE: Ensure each fuse as it is incialled, is the correct sise, type, and checked for continuity.
7.6.1 Install the fuses in their respective panel boards.
7.6.2 Inspect the distribution cabinet for loose materials, tools, etc.
7.6.3 Re-install all of the panel covers.
7.6.4 Position all of the fusible switches in the *0FF" position and close all of the fusible switch doors.
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35.000.54 R v. 4 Page 9 s
7.6.5 Shut the distribution panel door.
7.7 Reinstall and Resistance Check the Batteries.
7.7.1 Rainstall the batteries into the battery rack.
7.7.2 Reinstall and tighten the battery hold down clips.
7.7.3 Applying a thin coat of NO-OK-1D grease to the bolt shanks and threaded ends, reinstall all connecting links and cables that were determined in step 7.5.1.
Torque all connections to 72 to 78 inch-lbs. Record the average bolt-torque reading on Attachment 1.
7.7.4 Using a multimeter, take a post-to-post and post-to-power cable lug resistance reading. Record the readings on Attachsent 1. If any components /
connections have resistance readings that exceed the limits specified on Atachment 1, clean, rework, or replace them as necessary.
7.7.5 Retorque all bolts that were loosened, to 72 to 78 inch-lbs and retake the necessary resistance readings.
7.7.6 Apply a final coating of NO-OK-1D grease to that
- 1. Exterior of the battery posts. .
- 2. Connecting link ends that connect the battery posts.
- 3. Cable lug ends that contact the battery posts.
- 4. Balt and nut surfaces.
7.8 Reconnection of the Battery Bank 7.8.1 Rave Operations reinstall the distribution cabinets main switch position's 100 amp link and both 100 amp fuses that were removed in step 7.1.7.
7.8.2 Rave Operations place the distribution cat. net's asin position in the "0N" (closed) position.
7.8.3 Rave Operations place the distribution cabinet position 4 in the "0FF" (open) position.
7.8.4 Remove the 60 esp fuses (s) and 60 amp link from positon 4 of the distribution cabinet.
7.8 5 Remove the (+), (N), and (-) cable of the temporary battery bank from their respective location in the distribution cabinet's No. 4 position.
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7.8.6 Reinstall the 60 amp fuses (2) and link removed in step 4.4.
7.9 Restoration 7.9.1 Rnsure that all of the applicable labels / nameplates have been properly reinstalled.
7.9.2 See the Maintenance Order, Attachment A, for any further inspections and tests.
7.9.3 After the completion of the work, the protection leader / work leader shall sign the maintenance order and process the FN-21 in accordance with Reference 3.1.
35.000.54 Escissuro 1 Page 1 of 1 r
24/48 V de ELECTRICAL SYSTEM GENERAL MAINTENANCE a
i T
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i ZLV ZLV TEMPORARY BATTERY WIRING DIAGRAM 111385
F , l 1
35.000.54 Attactument 1 Page 1 of 2 4
24/48 V.D.C. ELECTRICAL SYSTEM - CENERAL MAINTENANCE MAINTENANCE DATA SHEET PIS No. PN-21 No.
Component Serial No. Prerequisites Met /
Signature Date This Maintenance Data Sheet only covers one 24/48 V de distribution cabinet and one 24/48 V de battery. If more than one 24/48 V de distribution cabinet or 24/48 V de battery is going to have maintenance performed on it, additional maintenance Data Sheets must be attached.
M&TE Step Acceptance Serial Verified Number Description Data Criteria No. by/Date 7.4.13 General condition sat.
of all fuse clips unsat. N/A N/A /
(Check one) 7.4.19 Ceneral condition sat.
of all switch unsat.
Mechanisms (Check one) N/A N/A /
7.4.22 General condition sat.
of distribution unsat.
Cabinet (Check one) N/A N/A /
7.5.2 Positive bus bar-to-ground negohns 1100 segohms _
Negative bus bar-to-ground negohms 2 100 megohns _
Neutral bus bar-to ground negohns 1 100 megohns /
7.5.6 Nega:ive bus-to positive bus negohns 1100 megohns Negative bus-to-neutral bus negohms 1100 megohns 111385
f~~~ I 35.000.54 Att:chment 1 Pag 2 2 cf 2
' 24/48 v.D.C. ELECTRICAL SYSTEM - CENERAL MAINTENANCE MAINTENANCE DATA SREET M&TE Step kesptance Serial verified Naber Description Data Criteria No. by/Date Neutral bus-to positive bus negohns > 100 megohms _
/
7.5.10 Cabinet temperature reading 'F N/A _
/
7.7.3 Average bolt-torque 72 to 78 reading inch-lbs /
inch-lbs 7.7.4 Post-to-Post <150 x 10-6 milliohns ihms /
Post-to-Power <150 x 10-6 cable lug milliohms ohns /
Test Equipment Used Serial No. Calibration Due Date Remarks:
Name (Print) Signature Initis1s Employer Date Completed By:
Reviewed By: /
Maintenance Foreman Date Approved By: /
Maintenance Engineer or his Delegate Date 111385 END