ML20049H908
| ML20049H908 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/23/1980 |
| From: | Watson W 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-9.1, NUDOCS 8203040565 | |
| Download: ML20049H908 (16) | |
Text
7_.
Sequoyah Uuclear Plant DISTRIBUTION 1C Plant Master File
- MAINTENANCE INSTRUCTION Superintendent Assistant Superintendent (Oper.)
Assistant Superintendent (Maint.)
MI-9.1 Administrative Supervisor IC Maintenance Supervisor (M) 1C Assistant Maintenance Supervisor (M)
POLAR CRANE CHECKOUT IC Maintenance Supervisor (E)
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, Assistant Maintenance 'iupervisor (E) 1C Maintenance Supervisor (I)
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(STANDARD PRACTICE SQM31 PERIODIC INSPECTION)
Results Supervisor i
3 IC Operations Supervisor IU Quality Assurance Supervisor P
Units 1 & 2. --
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Health. Physics f_
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Public Safety Services Supv.
Chief Storekeeper Preop Test Program Coordinator
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IC Outage Director L.^]
Chemical Engineer,(Results)
Radiochem Laboratory ~
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Instrument Shop Reactor Engineer (Results)
Instrument Engineer (Maint. (I))
IT Mechanical Engineer (Results)
Staff Industrial Engineer (Pl. Sys.)
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Training Center' Coordinator PSO - Chickamauga Er.grg Unit - SNP 7
Tre,,phred by:
W. A. Watson /W.M. Guinn Public Safety Services - SNP Ic Shift Engineer's Office S
Rev'ised By:
W.A. Watson m
Unit Control Room Subivi;t'ted By:
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t ysic Laboratory L-Supervisor 11!
Asst Dir NUC PR (Oper), 727 EB-C
' p 1ff Nuclear Document Control Unit. 606(EB-C PORC Review:
4/ 2 3 - 20 11T Superintendent, WBNP e_ }.
Date Superintendent, BFNP
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Superintendent, BENP w
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b 1 11 NEB, W9C174C-K r~ ) _
A[,rdvedBy:
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Supv., NPHPS ROB, MS
" - 1 Superintendent /
NRC-IE:II L.
Power Security Officer,' 620 CST 2-C -
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Nuclear Materials Coordinator _1410 CUBB (A [
Da te ' App roved :
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4 -2.3 yd Manager. OP-Q4&A Staff Resident NRC Inspector - SNP p
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Rev..No'.
Date Lm i
Revised Pages Rev. No.
Date
.. Revised Pages i
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i 8203040565 820301 PDR ADOCK 05000327 i
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SQNP MI-9 1 Page 1 of 7 Rev. 1 1.0 PURPOSE AND APPLICABILITY The purpose of this instruction is to describe the procedure for checkout of the 175-ton polar crane to assure reliable and safe operation.
It is applicable
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g prior to refueling operations. The polar cranes are located on elevation 796 in unit 1 and 2 reactor buildings. No technical specification restraints are applicable. This instruction fulfills the requirements of the periodic insp-ection as stated in standard practice SQM31.
This instruction also specified the procedures to be followed during the major safety inspection of the Reactor Building Polar Crane. This satisfies the g
L requirements of DPM N7hM15 and Standard Practice SQM31.
2.0 PREREQUISITES F.
~
2.1 A maintenance work request (maintenance request) shall have been issued to the craft foreman by his supervisor.
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F 2.2 Proposed inspection shall have been coordinated with the operations section and health physics personnel.
b 2.3 A hold order shall be obtained from the shift engineer for the performance of steps 51 through 510. Tagging procedures are given in appendir. B.
r 2.h If necessary a special work permit shall be obtained per section VI of the TVA Handbook of Health Physics.
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CAUTION: All requirements of the special work permit shall be met ~ "T during the course of this instruction.
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I' 2.5 A crane inspector from the Power Plant Maintenance Branch must perform the L
Major Safety Inspection with the aid of a qualified crane operator and the assistance of Plant Craft Personnel, if needed.
2.6 The crane shall be positioned on the ' refueling floor where it is not over any fuel, personnel, or open hatch, if possible. ---
I5 27 Danger areas shall be roped off and proper signs positioned as necessary.
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3.0 PRECAUTIONS W
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3.1 Standard crane hand signals shall be used by flagmen at all times, p, '
3.2 The pclar crane shall be operated by personnel listed on the crane operator '~
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eligibility list,(MSL-A37) or trainees under the supervision of such personnel. Record operator's name on the attached data sheet.
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i 3.3 Power shall be removed before working on electrical buses, controls, or rotating equipment.
3.h To preclude the possibility of a maintenance initiated common mode failure, crev personnel sha.11 not be the same for two consecutive performances of this MI.
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3.5 Other precautions are given in section 4.0 and 5 0.
Lu k.0 PREPARATION FOR WORK F~
-!. j h.1 Tools and materials needed O
h.1.1 Combination vrench set
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4.1.2
. Screwdrivers
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h.1 3 Allen vrench set La 4.1.k Clean, lint-free rags r+ !y
-[j 4.'15 Inspection mirror h.1.6 6" metal scale (1/64 inch graduations)
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4.1.7 Flashlights 3
FG h.1.8 Container for dirty rags 6
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6 50 PERFORMANCE OF WORK r- -lt l d NOTE: Record required data and remarks on Appendix A data sheets.
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G 5.1 Inspect crane supports for structural damage.
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52 Inspect bridge and trolley structures, including trolley bumpers, for j
any signs of damage such as cracks or distortion.
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i' 53 Inspect bridge and trolley rails for distortion, cracks, or loose supports.
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.5.h Inspect bridge and trolley wheels for cracked or distorted components y
such as pins, bearings, shafts, and gears.
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,5 5 Inspect shaft coupling for slung grease and vibration.
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5.6 Inspect flexible cable tray (catrae) for signs of physical damage to i
mechanism and cable.
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SQNP MI-9 1 Page 3 of T Rsv. 1 57 Inspect cable sheaves and drums and wire rope for excessive wear, scoring, nicking, cracks, or any condition that would abrade wire rope.
5.8 Inspect cable equalizer system for correct accumulator charge and leakage.
- 5.9 Inspect brakes on No. 1 and 2 bridge motors for wear to friction discs l
and prtssure plate. Check solenoid air gap (3/h" 1 1/8").
- 5 10 Inspect bridge hydraulic brake dru=s on No. 3 and h bridge motors for distortion, cracks, or excessive wear. Check brake shoes for wear and equal distance between shoes and drums (approximately 1/32"). Inspect
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hydraulic system for leaks. Check brake pedal for travel and spongeness.
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5.11 Inspect trolley brake no. 2 for wear to friction disc and pressure plate.
Check solenoid air gap (3/4" 1 1/8").
5 12 Release or have released hold order on crane power and apply power to --
,m crane.
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CAUTION: Be certain all personnel are clear of all rotating and electrical apparatus.
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5 13 Inspect trolley brake no. 1 drum for distortion, cracks, or excessive vear. Check brake shoes for wear and equal clearance between shoes and drum when released.
5.lk Inspect main and auxiliary hoist brake no. 1 shoes and drums for wear, l
l~l ment with scale attached to brake. Check stroke adjustment to be within distortion, or cracks. Check torque setting ( 2 h64 ft-lbs) by measure-l
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j' travel indicator marks. Check for equal clearance between shoes and drum.
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5 15 Inspect main and auxiliary. hoist brake no.2 for wear to friction discs ia and pressure plate. Check
- solenoid air gap (3/h" 1 1/8").
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516 Depress thumb switch on bridge control and check operation of bridge motor lL-brakes.
ilr-5 17 Rotate bridge a minimum of one full turn to the right and left. Use all ll modes of travel in both directions (i.e. pair 1, pair 2, and both).
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Vqry speed from minimum to maximum in all medes.
Check for smooth accelera-i,_
tion and deceleration. While traveling, check for the following: -
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5 17.1 Brake operation 5.17.2 Proper tracking of drive wheels F
5 17.3 Excessive noise or vibration
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't 518 Depress thumb switch on trolley control and check operation of trolley brakes.
519 Traverse trolley across entire span of bridge in both forward and reverse r: -
directions while varying speed fro = minimum to maximum. Check for smooth i
acceleration cnd deceleration. While traveling, check for the following:
~ l 5 19 1 Brake operation 5.19.2 Binding or skeving on rails (tracking)
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5.19 3 Unusual noise or vibration.
CAUTION: There are no limit switches on trolley travel.
5 20 Align bridge and trolley over refueling canal to allow hook travel to lov
.j limit position.
5 21 Start main and auxiliary hoist MG sets.
5 22 Lover and raise main and aur.iliary hooks while varying speed from minimum m
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to' m irus. Check for smooth acceleration and deceleration, brake opera-tion, excessive noise, or vibration.
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5.23 (Required only on Major Safety Inspection) inspect main and auxilary hook by a magnetic particle or liquid penetrant method in accordance with the 1--
following procedure. A qualified NDI inspector must perform this inspection.
5231 Remove crane hocks and take to a convenient work area.
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5 23.2 If hook is Painted, strip paint from hook using paint remover.
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5233 Check hook for cr'acks in accordance with approved liquid penetrant P. ],
or magnetic particle procedures.
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5.23.h
-Forging laps or other surface cracks shall be noted and' ground out VP to 1/16 inch depth. If surface indication is not removed, rfj further evaluation shall be made before proceeding.
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5.2h Check Undervoltage (UV) Relay for operability.
.( I 5 24.1 Main and Auxiliary Hoist 5 24.1.1 Verify if the master switch (MS) is in one of the
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running positions when the motor generator set is Lc.
started, the drive vill not operate until the MS is returned to the off position, picking up the under-voltage relay.
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MI-9.1 Page 5 of 7 Rev. 1 5.24.1.2 Verify if the emergency stop switch, or the W set starter is opened while the system is operated, the W relay drops out and sets the brake.
5 2k.2 Bridge and Trolley 5 2h.2.1 Verify dropping out ES-T drops out the Bridge W F
- relay, w
5.24.2.2 Verify dropping out ES-H drops out the trolley W r
relay.
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5 25 Check main and auxiliary hoist field loss (FL) relays. Verify both W relay are disabled by lifting 3B08 and kB08 wires on the main and auxiliary l,
hoist FL relay respectively. Return vires to normal after check is made, w
5 26 Check Main and Auxiliary Hoist overspeed switches (OS) i r-b 5 26.1 Remove OS and take it to the stop area for testing.
5 26.2 Use a drill motor or other suitable variable speed device to la rotate the OS to 2700 RPM and set the OS to open the contacts a 2618 RPM (2380 x 1.1).
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5 26.3 Install calibrated OS and verify by manually tripping OS that L..
the UV relay is dropped out.
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.,.j 5.27 Check current limit circuit for main and aux. hoist.
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5.27 1 Remove motor field by lifting F1 and F2.
5 27 2 71 ace as jumper on the N0 contact of the field loss relay (FL).
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5.27 3 Disconnect brake (B) by lifting "X" vires on B contractors 1B and 2B.
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5 27.h d
Move the main hoist mastersvitch (MS) to the fuIl hoist position, while observing amature current. Adjust P3 for 16h a=ps + 5%.
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Move (MS) to full lower position and check amps. CAUTION: Do
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not allow stalled current to flov for more than 10-15 seconds at a time.'
L"'.- I 5 27 5 RESTORE brakes contactors, FL, and motor field to normal.
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5 27.6 Repeat steps 5 27.1-5 27 5 for the Auxiliary hoists.
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SQNP MI-9.1 Page 6 of 7 Rev. 2 7
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5.28 Check the instantaneous overcurrent relay (IOC) circuit for the main and auxiliary hoist.
< i a-5.28.1 Remove the IOC's to the Shop area while being sure all wires removed are properly identified.
5.28.2 Connect the coil of the IOC to an arc welder set on D.C. with the rheostat in the zero position increase the current while 3
monitoring it with a CSSC D.C. ammeter. Ensure the IOC trips at
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180 amps. Adjust as required.
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5.28.3 Install IOC into position and connect all wires. Manually trip
_l IOC to ensure the UV relay drops out.
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5.29 Check Main and Auxiliary Hoist emergency dynamic lowering.
5.29.1 Verify emergency dynamic lowering relay (EOL) is packed up by starting up MG set and seals in.
Also verify EDL drops out on loss of power to crane by opening, main breaker.
5.29.2 Check cynamic braking resistors ohms valve and verify it is L-0.10.
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5.29.3 Attach test weight (punchlist weight details) to hoists hook L
and raise weight up until the hook is at upper limit.
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CAUTION: Perform test over upper internals stand.
",I 5.29.4 Turn off all power to the crane if it is not already.
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5.29.5 Manually release hoist brakes 1 and 2 and see that weight is L-slowly lowered.
Cj 5.29.6 Repeat for the auxiliary hoist.
1 5.30 Deenergize crane with crane power off pushbutton.
NOTE: Leave power on lighting cabinet and motor heaters.
1 5.31 Record on Appendix A data sheets any abnormal conditions found and any
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adjustments er corrections that were made.
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Page 7 of 7
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Rsv. 1 6.0 POST MAINTENANCE CHECK - RETURNING EQUIPMERI' TO SERVICE 6.1 No post maintenance tests are required for the completion of this mainten-
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ance instruction.
6.2 When the work is completed, assure that the crane' power is off and all motor heaters are left on.
4 7 0' REFERENCES F
7,1 ' Operating Instructions for 175-Ton Overhead Traveling Polar Crane, Star.
g Iron and Steel Co.
7.2~ Standard practice SQM31/DPM No. N74M15 r.
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73 Maintenance section instuction letter A37 p-v:
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MI-9 1 Appendix A - Data Sheet Page 1 of 7 Rev. 1 sj POLAR CRANE CHECKOUT DATA SHEET NOTE:
Data sheet step nu=bers correspond to instruction step numbers.
A.
Work to be, performed.
I Specify 1.
Polar Crane Checkout (Periodic Inspection) r.
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2.
Polar Crane Checkout (Mjaor Safety Inspection)
Acceptab'1 Unacceptable" r.
3.2 Crane operator Il 5.1 Crane supports i
52 Bridge and trolley structures f; #
53 Br'idge and trolley rails 5.h Bridge and trolley wheels s
5.5 Shaft couplings
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57 Cable sheaves and drums
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a.
Main hoist 7._ '
b.
Auxiliary hoist i
L-5.8 Cable equalizer system
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Specify in " Remarks" why item is unacceptable.
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, REMARKS:
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SQllP MI-9 1 Appendix A - Data Shoct Page 2 of 7 Rev. 1 II. BRAKE INSPECTION AS FOUND AS LEFT ACCEPTANCE CRITERIA 5.19 Bridge Motor #1 Brake a.
Solenoid air gap 3/h" 1 1/8" b.
General condition No cracks, distortion, or excessive wear to friction disc or pressure plate 59 Bridge Motor #2 Brahe a.
Solenoid air gap 3/4" 1 1/8" 7
No cracks, distortion, b.
General condition or excessive wear to friction disc or pressure
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plate t-5.10 Bridge Motor #3 Hydraulic Brak9 r-i a.
Dru=-to-shoes Equal clearance between clearance drum and shoes (approx.
1/32")
b.
General condition No cracks, distortion, or excessive wear to shoes or drum l
5 10 Bridge Motor #4 Hydraulic Brake
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a.
Drum-to-shoes -"
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8 clearance drum and shoes (approx.
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1/32")
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b.
General condition No cracks, distortion, or excessive wear to r"~ -
shoes or drum L
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5.31 Trolley Brake #2
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a.
Solenoid air gap 3/4" 1 1/8" b.
General condition No cracks, distortion, k:",
or ' excessive wear to F
friction disc or pressure plate baz
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SQ3P MI-9 1 s
Appendix A - Data Sheet Page 3 of 7 Rev. 1 i.
II.
BRATE INSPECTION (continued)
AS FOUND AS LEFT ACCEPTANCE CRITERIA
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r 5.13 Trolley Broke #1 a.
Drum-to-shoes Equal clearance between clearance and shoes (approx. 1/32")
b.
General condition No cracks, distortion,
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.or er.cessive year to shoes or drun r-5 1h Main Hoist #1 Brake a.
Drum-to-shoes cl.
Equal clearance between I.
drum and shoes (approx.
L 1/32")
b.
Torque setting h6h ft-lbs Ge'neral condition No cracks, distortion, c.
or excessive wear to shoes and drum, stroke p
between indicators u
, 5 14 Auxiliary Hoist #1 Br.
L.
a.
Drum-to-shoes cl.
Equal clearance between drum and shoes (approx.
1/32")
r-b.
Torque setting h6h ft-lbs g
c.
General condition No cracks, distortion, or excessive wear to shoes
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indicators b
E 5 15 Main Hoist #2 Drake t-a.
Solenoid air gap 3/k" 1 1/8" Q
b.
General condition No cracks, distortion, or excessive wear to friction discs or pressure plate y
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App;ndix A - Ee.ta Shrst Page 1, of 7 Rev. 1 II.
BRAKE INSPECTION (Continued)
AS F0tmD AS LEFT ACCEPTANCE CRITERIA 5.15 Auxiliary Hoist #2 Brake a.
Solenoid air gap 3/h" + 1/8" b.
general condition No cracks, distortion, or excessive wear to friction disc or pressure
.2 plate REMARKS:
Data Taken By Date III. FUNCTIONAL TESTS ACCPETABLE UNACCEPTABLE" 516 Bridge brakes L.
5.17 Bridge travel right t
L, a.
Pair 1 b.
Fair 2 r,-
c.
Both C
Bridge travel left k_ -
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Pair 1 PL b.
Fair 2
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Both
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5 18 Trolley brakes h
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Appendix A - Data Sheet Page 5 of Rev. 1
_j III. FUNCTIONAL TESTS (continued)
ACCEPTABLE UNACCEPTABLE"
.f 5.19 Trolley travel forward I.
Trolley travel reverse rb 5.22 Main hoist travel down and up 7
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Auxiliary hoist travel down and up Specify in " Remarks" why item is unacceptable.
a.
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5.23 Main Hook Inspection l..
q Aux. Hook Inspection
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REMARKS:
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Data Taken By Date L,
[f 5.24.1.1 Main Hoist W L.
Aux Hoist UV
,g 5.24.1.2 Main Hoist UV Aux. Hoist W 5.24.2.1 Bridge W r"
5.24.242 Trdiley W l
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e bn-9 1 Appendix A - Data Sheet Page 6 cf 7 i
Rev. 1 ACCEPTABLE UNACCEPTABLE 5.25 Main Hoist UV Interlocks with FL Aux. Epist UV Interlocks with FL
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Wires returned to normal Initials Date
[r 26.2 CSSC Tachometer No.
Calibration Date l
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OS switch set point in rpm Main Hoist
. Aux. Hoist I~
Main and Aux. OS switch inposition and manually check for inter-t'.
locking with respective UV Acceptable Unacceptable l'
5.27 1-5 27.3 Completed:
Date Initials en 5.27.h CSSC Ammeter No.
Calibration Date h}
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Ampacity @ full hoist
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Ampacity @ full lower amps i
5 27 5 Return to normal Date R ;".
Initials b-5 27.6 5 27.1-5.27 3 Completed
- -- Date Initials mj-0-
5 27.h Ampacity 8 full hoist amps n
,.a Ampactiy 8 full lower amps jkf 5 27 5 Return to normal Date 3
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MI-9 1 Appsndix A - Data Shest Page 7 of 7 Rev. 1 5 28.1 Wire and IOC terminal marked Date Initials 5 28.2 DC Acneter.No.
Calibration Date
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IOC trip setting as found amps as left amps 5 28.3 IOC in position wired and UV relay interlocking verified:
F Date Initials ACCEPTABLE UNACCEPTABLE
[.1 5 29 2 Kelvin Bridge No.
p Calibration Date L
DBRS Value
, Ohms
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t 5 29 5 Acceptable
. Unacceptable L..
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5 29.6 Acceptable
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App:;ndix B f
Page 1 of 1 Rev. 1
,j ll CLEARANCE PROCEDURE - POLAR CRANE CHECKOUT t.,..
Unit No.
A.
Work to be, Performed:.Date:
Specify 1.
MI-9 1 Polar Crane Checkout (Periodic Inspection) 2.
MI-9 1 Polar Crane Checkout (Major Safety Injection)
B.
Initial Conditions: Date r-1.
Crane is not in use and im.ediate need is not anticipated. _ _
C.
Tagging Instructions: Date f'
l.
For bridge, trolley, and hoist inspections, no clearance is required.
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2.
For collector ring inspection or checks where the energized collector g
p ring vill constitute a hazard.
~ fl Open and rack out to disconnected position k80-V aeb polar 45 a.
l crane power supply on h80-V shutdown board 1B2-B (2B2-3 unit
- 2) co=part=ent No. kC and tag with hold order.
7
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b.
Pull 125-V d.c. control fuses and t'ag with hold notice.
g D.
Releasing and Aliging for Operation: Date
~
Remove hold ' notice from "vooden fuse inserts" for h80-V 1.
a.
l polar crane power supply breaker control circuit and install
[3 fuses.
a s
b.
Remove hold order from h80-V power crane power supply j
breaker, place in connected position, and close.
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