ML20049H910
| ML20049H910 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 02/15/1980 |
| From: | Craven D, Guinn W, Stephanie West TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20049H905 | List: |
| References | |
| REF-GTECI-A-36, REF-GTECI-SF, RTR-NUREG-0612, RTR-NUREG-612, TASK-A-36, TASK-OR GL-81-07, GL-81-7, MI-9.2, NUDOCS 8203040572 | |
| Download: ML20049H910 (12) | |
Text
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S;quoyah Sucitar Plant DISTRIBUTION IC Plant Master File Superintendent MAINTENANCE INSTRUCTION Assistant Superintendent (Oper.)
IU Assistant Superintendent (Maint.)
Aaministrative Supervisor MI-9.2 1C Maintenance Supervisor (M)
IC Assistant Maintenance Supervisor (M)
AUXILIARY BUILDING CRANE CHECK-IC Maintenance Supervisor (E)
OUT (STANDARD PRACTICE SOM31 1C ~ Assistant Maintenance Supervisor (E)
PERIODIC INSPECTION)
Maintenance Supervisor (I)
Results Supervisor IC Operations Supervisor Unit 0 Quality Assurance Supervisor liealth Physics Public Safety Services Supv.
2 Chief Storekeeper Preop Test Program Coordinator IC Outage Director Chemical Engineer Radiochem Laboratory Instrument Shop Reactor Engineer Instrument Engineer Mechanical Engineer Staff Industrial Engineer Training Center Coordinator PSO - Chickamauga Engrg Unit - SNP r
Prepared By:
D.C. Craven /W.M. Guinn Public Safety Services - SNP ic Shift Engineer's' Office Revised By:
Steve West ic Unit Control Room Submitted By:,_ IM at ysi Laboratory Supervisor
_ Chief, Nuclear Generation Branch \\
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in P Prod Central Office File PORC Review:
I3/ /5I/190 in Superintendent, WBNP D6te Superintendent, BFNP Superintendent, BENP in EN DES - NEB NEG Li Approved By:
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01 10 Supv., NPHPS ROB, MS
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Supe infendent NRC-IE:II r'~
I Power Security Officer', - 620 CST 2-C I
( )1 Nuclear Materials Coordinator
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Manager, OP-QA&A Staff Date Approved:
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ig_ P Prod Plant Eng. Branch ic NSRS, 309 GB-K._ ___;.__..._..
Rev. No.
Date Revised Pages Rev. No.
Date Revised Pages
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MI-9 2 Page 1 of h t
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1.0 PURPOSE AND APPLICABILITY g
j-This instruction describes a visue.1 inspection and checkout of the 125/10 ton auxiliary building crane to assure 1 s safe and reliable operation. It is applicable prior to a unit outage or before making a critical lift such as a loaded spent fuel cask. It fulfills the requirements of the periodic inspection J
as stated in Standard Practice SQM31.
1 2.0 PREREQUISITES r-l 2.1 A maintenance work request (Maintenance Report) shall have been issued to the craft foreman by his supervisor requesting that this MI be performed.
2.2 A Hold Order shall be obtained from the shift engineer if required.
Normal crane checkout will not require a Hold Order. Tagging procedures
-- i are given in Appendix B.
3 2.3 Health physics personnel shall be notified of the proposed inspection and requested to determine if a Special Work Permit is required.
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NOTE: All requirements of the Special Work Permit (if required) shall be met during the course of this instruction.
I 2.h Proposed inspection shall have been coordinated with the operation section.
1.
3.0 PRECAUTIONS p[
L 3.1 Standard crane hand signals shall be used by flagmen at all times.
r-3.2 The crane shall be operated by personnel listed on the Crane Operator Elegibility List (MSL-A37) or trainees unde'r the supervision of such.
personnel. Record operator's name on the attached data sheet.
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['.~i 3.3 Power should be removed befor'e working on electrical buses, controls, L-.
or rotating equipment.
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3.4 The crane operator shall be aware of all test personnel on the bridge or i*
trolley during operational checks and shall perform nct crane movements that
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might endanger these people.
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1 35 Care shall be taken in the hand operation of the crane limit switches as some of these are located near the h80-V crane collector rails.
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Page2ofbo Rev. 2 k.0 PREPARATION FOR WORK h.1 Tools and material needed:
h.1.1 Combir!ationvrenchset k.1.2 Screwdrivers k.1.'3 Inspection mirror Y-4.1.h 12 inch metal scale (1/6h inch graduations) h.1.5 Clean, lint-free rags
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h.1.6 Container for dirty rags 4.1.7 Flashlights 5.0 PERFORMANCE OF WORK UOTE: Record required data and remarks on Appendix A Data Sheets.
CAUTION: Crane power is to be removed by opening the main breaker in the crane cab after the crane has been moved a few feet from the landing.
-- 5. 1 Inspect crane, bridge, and trolley supports for any deformed, cracked, or corroded structural members and any loose fasteners.
_52 Inspect bridge and trolley rails for distortion, cracks, loose supports, or excessive wear.
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__ 5. 3 Inspect bridge and trolley wheels for cracked or distorted components such r--
as pins, bearings, shafts, and gears.
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- 5.h Inspect flexible cabletray (catrac) for signs of damage to mechanism and cable.
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^55 Inspect cable sheaves and drums (both auxililiary and main hoist) for excessive wear, cracks, nicking, scoring, or any condition that would i-abrade the vire rope.
5.6 Inspect the main and auxiliary hoist electric disc brakes for abnormal year to either the friction disc or the pressure plate.
Check solenoid air gap
...I (should be 1-3/8" + 1/8") and adjust per Stearns Installation and Maintenance Data Sheet No. 300 (Operation-Maintenance Manual 125/10 Ton CHECO Crane) if
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necessary.
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SQHP MI-9.2 Page 3 of b Rev. 2 i
_57 Inspect the bridge drive hydraulie brake drum for distortion, cracks, or excessive wear.
Check brake shoes for abnormal wear and equal distance between shoes and dru=.
Inspect hydraulic system for leaks and check brake pedal for travel and spongeness. Bleed brake system (remotely from crane cab) if necessary.
~, 5.8 Reapply power to the crane by closing main breaker in the cranecab.
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CAUTION: Ensure that all personnel are clear of all electrical or rotating machinery before applying power.
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. 59 Inspect the bridge drive electric brake drum for distortion, cracks, or escessive wear. Check brake shoes for abnor=al wear and equal distance between shoes and drum.
Check the spring length and solenoid gap (settings cund on nameplate) and adjust per nameplate if necessary.
~'5.10 Inspect both trolley electric brake drums for distortion, cracks, or Li excessive wear. Check brake shoes for abnormal wear and equal distance between shoes and drum. Check the spring length and solenoid gap (settings found on nameplates) and adjust per nameplate if necessary.
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- 5.11 Inspect main and auxiliary hoist electric brake shoes and dru=s for
_j abnormal wear, distortion, or cracks. Check for equal clearance between brake shoes and drum. Check the spring length and solenoid gap (settings found on nameplates) and adjust per nameplate if necessary.
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' 5 12 Check for proper operation of bridge drive electric brake by depressing L._
thu=b switch on the bridge control handle and observing brake action.
i 5.13 Check for proper operation of the bridge drive hydraulic brake by depressing p.
i foot pedal and observing brake operation.
5.14 Check for proper operation of trolley drive electr$c brakes by depressing thu=b switch on the trolley control handle and observing brake operation.
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- 5.15 Traverse trolley across entire span of bridge in both the north and south r
directions vLle varying the speed from minimum to maximum. Check for the following:
5 15.1 Smooth acceleration and deceleration 5 15.2 Proper brake operation 5 15.3 Any unusual noises or vibrations 5.13.4 Any binding or skeving of the trolley on the rails 5 15.5 Proper engagement of trip bar C with limit switches C and C'
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f SQNP MI-9 2 Page h of b Rev. 2 5.16 Position trolley north of limit switches C and C'and traverse bridge across entire span of its travel in both east and vest direction. Vary the speeds from minimum to maximum and check for the following:
5.16.1, Smooth acceleration and deceleration 5.16.2 Proper brake operation (both electrical and hydraulic) 5 16.3 Any unusual noises or vibrations
'l 5 16.4 Proper, tracking of bridge drive wheels and any evidence of binding or skeving e-5 16.5 Proper engagement of trip bars A, B, and D vith their respective limit switches (A, A', B, B', D, and D').
i 5.17 Lover and raise the main and auxiliary hoists while varying the speed from L.
minimum to maximum. Check for the following:
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5.17 1 Smooth acceleration and deceleration L.
5 17.2 Proper brake operation 5 17.3 Any unusual noise or vibration 5.18 Position the crane bridge approximately midway between the vest vall and the spent fuel pit. Position the trolley north of limit switches C and C' L.
(see hhN-30kR2 for location).
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5.19 Manually trip limit switches B, C, and D. Verify the following:
5 19.1 Only vestward movement of the bridge is possible.
pff 5.19.2 Red light beneath operator's cab is on.
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5 19 3 Both mechanical stops located on either side of the trolley I'
rails are up.
5 19 4 Only northward movement of the trelley is possible.
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5.20 Manua.ly. trip limit switches D' and A.
Verify the following:
5 20.1
.only eastward movement of the bridge is possible.
5 20.2 Red light beneath operator's cab is on.
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SCW MI-9 2 Page 5 of 6 Rev. 2 5 20.3 Both mechanical stops located on either side of the trolley rails are up.
5 20.h Only northward movement of the trolley is possible.
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5 21 Return all limit switches to their original position and verify that all motions of the crane bridge and trolley are again possible.
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5.22 Reposition the crane bridge approximately midway between the vest vall and the spent fuel pit. Reposition the trolley north of limit switches C and i
V.
C'.
5 23 Manually trip limit switches B', C', and D'.
Verify the following:
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5 23.1 Only vestward movement of the bridge is possible.
5.23.2 Red light beneath operator's cab is on.
5 23.3 Both mechanical stops located on either side of the trolley
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rails are up.
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5 23.h Only northward movement of the trolley is possible.
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5.2h Manually trip limit switches D and A'. Verify the following:
5.2h.1 Only eastward movement of the bridge is possible.
E-5 2h.2 Red light beneath operator's cab is on.
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5.2k.3 Both mechanical stops located on either side of the trolley rails L;
are up.
5.24.h Only northward movement of the trolley is possible.
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5.25 Return all limit switches to their original position and verify that all motions of the crane bridge and trolley are again possible, ad 5 26 Record on data sheets of bH-9 2 any unusual conditions found and any adjustments or corrections that were made.
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6.0 POST MAINTENANCE CHECK - RETURNING EQUIPMENT TO SERVICE 6.1 - No post maintenance tests are required for the completion of this
,' i' maintenance instruct $on, k
6.2 -When the work is completed, assure that all crane motor heaters are left V.
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SQiP MI-9.2 Page 6 of 6 Rev. 2 70 REFERFUCES 71 Operation - Maintenance Manual 125/10 Ton CHECO Crane 7.2 Standar,d Practice SQM 31/DPM No. Uh5M15 hkN-30hR2 "125 Ton Crane Limit Switch Arrangement" 73 7.h Maintenance Section Letter A37 o
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SQNP MI-9 2 Appendix A Page 1 of %
Rev. 2 AUXILIARY BUILDING CRANE CHECKOUT NOTE: Data sheet step numbers correspond to procedure numbers.
I. GENERAL INSPECTION
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Acceptable Unacceptable 32 Crane operator 5.1 crane, bridge, and trolley supports c-52 Bridge and trolley rails 5.3 Bridge and trolley wheels 5.k catrac (flexible cable trays)
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55 cable sheaves and dru=s 5 5.1 Main hoist P
1-5 5.2 Auxiliary hoist u
Specify in " Remarks" vhy item is unacceptable.
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Remarks:
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ry Data Taken By Date Reviewed / Approved By Date g,
Maint. Supv. or Asst. Ms. int Supv.
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6 SQUP MI-9.2 Appendix A Page 2 of 9 Bev. 2 II. BRAKE INSPECTION AS FOUND AS LEFT ACCEPTANCE CRITERIA 5.6 Main Hoist Electric Dise Brake a.
solenoid air gap 1-3/8" 2.1/8"
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b.
general condition no cracks, distoration, or excessive v5ar to friction discs or pressure plate
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5.6 Aux Hoist Electric Drum Brake n -
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solenoid air gap 1-3/8" 1,1/8" b.
general condition No cracks, distortion, or excessive wear to friction discs or pressure plate 5.7 Bridge Hydraulic Brake r-a.
drum-to-shoe clearance equal clearance between drum and shoes (approx.
1/32")
b.
general condition no cracks, distortion, m-p.---
or excessive wear to shoes or drum 5.9 Bridge Electric Brake solenoid air gap normal - 3/64" a.
L-maximum - 3/32" b.
spring length 2-7/8" r-no cracks, distortion, I
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general condition or excessive veer to shoes or drum 7'
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5.10 Trolley Brake #1 (East) a.
solenoid air gap normal - 3/64" maximum - 3/32" L-2-7/8" b.
spring length no cracks, distortion,
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or excessive year to b2.
c.
general condition shoes or drum
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SQNP MI-9 2 Appendix A Page 3 of k Rev. 'e-
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BRAKE INSPECTION (continued)
AS FOUND AS LEFT ACCEPTANCE CRITERIA
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5.10 Trolley Brake #2 (West)
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a.
solenoid air gap normal - 3/6h" maximum - 3/32"
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spring length 2-7/8" r
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general condition no cracks, distortion, or excessive wear to shoes or drum i
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5.11 Main Hoist Drum Brake normal - 3/6h" maximum - 3/32" a.
solenoid air gap 7-27/32" b.
spring length no cracks, distortion, l
r-or excessive wear to c.
general shoes or drum 5.11 Aux. Hoist Drum Brake normal - 3/6h"
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solenoid maximum - 3/32" iw b.
spring length 8-5/32" F.
c.
general condition no cracks, distortion, or excessive wear to shoes or drum g
E REMARKS:
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2 Data Taken By Date d
Reviewed / Approved By Date Maint. Supv. or Asst. Maint. Supv.
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SQ'iP MI-9.2 Appendix A Page h of k Rev. GL
- III. FUNCTIONAL CHECK y
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Accettable Unaccettable 5 12 Bridge brake (electric) 5 13 Bridge brake (hydraulic) 5.1h Trolley drive brakes
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- 1 (east) brake
- 2 (west) brake
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5.15 Trolley travel north south 5.16 Bridge travel E'
east b_
vest 5.17 Hoist operation (lover and raise)
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main hoist auxiliary hoist 4
519 operation of limit switches B, C, and D L_
5.20 operation of limit switches D' and A 7-5.23 operation of limit switches B',
C', and D' 5 2h operation of limit switches D and A' 1
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Specify in " Remarks" why item is unacceptable.
Remarks:
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I2' Lt Data Taken By Date IT' Reviewed / Approved By Date b-Maint. Supv. or Asst. Maint. Supv.
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SQNP MI-9 2 Appendix 3 Page 1 of 1 Rev. @
CLEARANCE INSTRUCTIONS - AUXILIARY BUILDING CRANE A.
Work to be Performed: Date:
1.
MI-9 2 B.
Initial Conditions: Date:
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1.
Crane is not in use and immediate need is not anticipated.
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C.
Tagging Instructions: Date:
1.
Complete clearance, allowing work on any portion of crane, crane rails, and emergency trip circuitry.
Remove 125-volt d.c. control fuses for h80-volt ACB a.
crane power supply and tag with Hold Order.
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b.
Open h80-volt ACB crane power supply (h80-volt auxiliary L,
building common board) and tag with Hold Order.
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D.
Releasing and Aliging for Operation: Date:
1.
a.
Remove Hold Notice from " wooden fuse inserts" for h80-volt auxiliary building crane power supply breaker j
control circuit and install fuses.
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b.
Remove Hold Order from h80-volt auxiliary tuilding crane power supply breaker, plac.e in connected position, and g
close.
E.
Post Maintenance Testing: Date:
1 1.
'If work has involved the repair of crane travel interlocks, perform SI-10h which satisfies SR h.9 7
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Ls System Operabf.lity demonstrated and ready for returning to service.
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