ML20132F588
| ML20132F588 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Waterford |
| Issue date: | 05/26/1982 |
| From: | LOUISIANA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML082320156 | List:
|
| References | |
| FOIA-84-206 MM-6-012, MM-6-12, NUDOCS 8510010358 | |
| Download: ML20132F588 (27) | |
Text
.
WATER ORD 3 SES PLANT OPERATING MANDAL s
LO UISI AN A o
POWE A 6 LIGHT E551$ s'EsN6 MM-6-012 POM VOLUSC 9
REV*SICN n
POM SECTICN 6
APPROVAL DATE:
May 26, 1982 EFFEC *IVE DATE:
S ktD M m e H /L N SL M 7yy qag rg5r TA)ST GLtc7to),
M AN d (C n' 2.6) He)f
/N Na v v.,3 ' yzinT-ovX MAINTENANCE PROCEDURE Sir)CA-STRUCTURAL BOLT TENSIONING ssawwa
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{U2A b PORC Meering No.
Q - 19 A Reviewed
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-w PCRC Chairman / /
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Approved: /
_WM7-3 Flant cishager-Nuclear A'
i 8510010358 850227
[O/A
['206 PDR FOIA BERNABE84-206 PDR KM
WATEEFCED 3 SES FLANT 0? ERAT;5G MANUAL CHANGE / REVISION /D'.'.I"'!ON REQUEST m
Procedure No. M 6h ' - m '
Title yE:;:,,de ) S W Todm M -
Effective Date 4li (if dif ferent frc= ?F.-N apprev'zl date) g l *e i.
B.
a=
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Change So.
i B.
Revision No.
O C.
Deletion MIA n,w..mn, e-F.cference to SAP-03. Candition Iden:1ficatien and C rrective Action or -U:C5-002, Condition Identificatien and Work Authorization, as apolicable. --
"cU**f, 5*m; A tim Originator Date
/d - 4 /-8 2.
Nb
/EE Date N I L c/d Technical Review -
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SAFETT EVALUATION Does this change, revision, er deletion:
TES NO/
1.
Change the facility as described in the FSAR?
I 2.
Change the procedures as described in the FSAR?
3.
Conduct tests / experiments not described in the FSAR?
4.
Create a condition or conduct an operation which e -
ceeds, or could result in exceeding, the limits in Technical Specifications?
If the answer to any of the above is yes, co=plete and at-tach a 10 CFR 50.59 5 ' y Evaluation checklist.
Saf ety Evaluation -
Nd bh Date
/S C 5 -E?_
Group /Dep't. Head Review M N 'M
- Date M l L dI Da te/t -2 J'-/ L-(yes)
Tes;porary Approval' 3
W-i M bt MMk>
Date Temporary Approval
- QC Review drA 1 -
Date
// - '- P -r z - -
[ M =
Date Y M b Mesting No.
To VM PORC Revie
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M u1/
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Date
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Plant Manager-Nuclear ApprovaA z
V
' Temporary approval must be followed by Plant ManaEer-Nuclear approval within 14 days.
UN'"-1 -0 03 Revision 4 32.9 (1 of 1) e
.4aintenance Procedure MM-6-012 Structurai Solt Tensioning Revision 0 r
TABLE CF CONTENTS i
1.0 PURPOSE 2.0 REFEREN CES 3.0 PREREQUISITES 4.0 PRECAUTIONS AND LIMITATA0nS 5.0 INITIAL CONDITIONS 6.0 MATERIAL AND TEST EQUIPMENT 7.0 ACCEPTANCE CRITERIA 8.0 PROCEDURE 8.1 Tensioning by Turn-of-Nut Method 8.2 Tensioning Using Torque or != pact Wrenches s.9. 0 SETPOINTS 1
10.0 ATTACHMENTS 10.1 Structural Bolt Tensioning Chart (1 page) 10.2 Nut Rotation for Tensioning by Turn-of-Nut Method (3 pages)'
10.3 Tensional Check or Torque and != pact Wrenches (2 pages) 10.4 Tensioning Data Sheet (1 page) 11.0 COMMITMENTS AND ' REFERENCES
~
LIST OF EFFECTIVE PAGES Title Revision'O 1 - 15 Revision 0 i.32.
CL ge.
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1
Mcintenance Procedure MM-6-012
'Itructural Bolt Tensioning Revision 0 TABLE OF CONTENTS 1.0 PURPCSE 2.0 REFEREN CES 3.0 PREREQUISITES 4.0 PRECAUTIONS AND LIMITAT OnS 5.0 INITIAL CONDITIONS 6.0 MATERIAL AND TEST EQUIPMENT 7.0 ACCEPTANCE CRITERIA 8.0 PROCEDURE 8.1 Tensioning by Turn-of-Nut Method 8.2 Tensioning Using Torque or I= pact Wrenches 9.0 SETPOINTS I
N.. /10.0 ATTACHMENTS 10.1 Structural Bolt Tensioning Chart (1 page) 10.2 Nut Rotation for Tensioning by Turn-of-Nut Method (3 pages) 10.3 Tensional Check of Torque 'and Impact Wrenches (2 paSes) 10.4 Tensioning Data Sheet (1 page) 11.0 COMMIT?iENTS AND REFERENCES LIST OF EFFECTIVE PAGES Title Revision 0 1 - 15 Revision 0 I, 2 Chanqs. l 4
v 6.
MM-6-012
. Maintenance Procedure Structural Bolt Tensioning Revision 0 m
..o E2220SI 1.1 Tne purpose of this procedu. e is to delineate the rethods of tensioning ASTM A325 high-strength carbon steel bolts and A490 high-strength alloy steel bolts that are used in the assembly of structural steel joints.
1.2 This procedure is to be utilised in tensioning other types of structural fasteners to tension or torque values obtained fro = the specific construction or design documents.
2.0 E555ESURES 2.1 MM-1-002, Mechanical Maintencnce Practices 2.2 H P 110, Radiation Work Permits 2.3 SAP-03, Condition Identification cnd Corrective Action 2.4 UNT-7-006. Housekeeping 2.5 American Institute of Steel Construction ( AISC), Structural Joints Using ASTM A325 and A490 Bolts 2.6 (LATER), Skidmore Wilhelm Torque Test Instruction Manual 2.7 MM-1-004, Mechanical Maintenance Tool Room Control 2.8 SAP-09, Tagging 2.9 UNT-7-003. Control of Expendable Materials 2.. to unT-5-001, CondSion Ihn+ificahon and Wore AuOori r.oNon -
N 3.0 REEEEgillsIIIs 3.1 Obtain a Radiation Work Permit (RWP) in accordance with Reference k
2.2, Radiation Work Permits, when designated on the Condition k
Identification Work Authorization (CIWA) of Reference 2.3, Condition
\\
Identification and Corrective Action / or. Reference, z.10, CondNion Iden+ ifico4 (on a nd wor k b+horir ation. Os a p ol. ca ble.
3.2 The required co=ponents have been shut down and tagged in accordance 0
with Reference 2.8, Tagging.
D
3.3 ' other prerequisites as specified on the applicable CIWA.
/
2 i
A
Maintenance Procedure MM-o-012 Structural 301t Tensioning Revision 0
-~s 4.0 E35C42:ICUS ASD_ LIE!!LIi0n3 4.1 R2 placement parts shall be One same as or equivalent to the original parts.
4.2 Component repair d'ocumentation, hold point designation, personnel qualification requirements and other administrative functions shall be perf ormed in accordance with Reference 2.1, Mechanical Maintenance Pra ctices.
]
4.3 Ensure that area cleanliness is maintained in accordance with 1
Reference 2.4, House keepin g.
4.4 Bolt Tension 4.4.1 Bolts shall be tightened in properly aligned holes.
4.4.2 Tensioning methods may be perf ormed by turning either the bolt or nut, whichever is more accessible when the other is prevented from
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rotating.
4.5 Calibrated Wrenches 4.5.1 Torque wrenches used shall be calibrated and controlled in ac-cordance with Reference 2.7, Mechanical Maintenance Tool Room C on tro l.
4 5.2 While in use, torque and impact _w. tenches shall be checked at least once each working day for each different bolt diameter being installed.
NOTE Checking is defined as verification of the torque required to produce the bolt tension specified in Attachment 10.1, Structural Bolt Tensioning Chart.
/
3 i
Maintenance Procedure MM-6-012 Structural Bolt Tensioning Revision 0 4.5.3 If the surface condition of the bolts, nuts, or wasners has deteriorated since the last time the torque and i= pact Wrenches were chacked, the wrenches shall be rechecked.
4.5.4 Checking of torque and impact wrenches shall be accomplished by tensioning three typical bolts of each bolt diameter with the Skidmore-Wilhelm Torque Test Machine.
Results for the wrenches shall be entered on Attachment 10.3, Tensional Check of Torque and Impact Wrenches.
4.6 Bolt Reuse 4.6.1 Bolts used in check (ng wrench s shall be discarded.
disub 4.6.2 A325 and A490 bolts re' moved from structural joints shall not be reused.
4.6.3 Retightening previously tightened bolts which may have been loosened by the tightening of adjacent bolts shall not be (s,)
considered reuse.
4.7 Ensure that any beveled washers removed are reinstalled at the cor-rect locations.
4.8 Bolted steel parts shall not be separated by gaskets in structural joints.
4.9 Cleaning shall be done with acetone or with an LP&L approved so'Ivent in accordance with Reference 2.9, Control of Expendable Materials.
Use lint-free cloths to ensure dryness af ter cleaning.
4.10 Other precautions and limitations as specified on the applicable CIWA.
5.0 IRIIIAL_.CQHDIIIQHS As specified on the applicable CIWA.
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4 i
Maintenance Procedure MM-6-012 Structural Bolt Tensioning Revision 0 6.0 13I52IAL_AU2_ISSI_IQU!fSEEI 6.1 Torque wrenches 6.2 Torque multipliers 6.3 Adapters 6.4 Ratchets 6.5 Skidmore-Wilhelm Torque Tension Test Machine (Part No. LATER) 6.6 Aesorted sockets 6.7 Impact wrenches 6.8 Suitable marking crayons 6.9 Spud wrenches 7.0 ACCEZIANSE_fEIIISIA i
The required bolt tension shown on Attachment 10.1, Structural Bolt J
Tensioning Chart, has been applied to all bolts being installed.
S.O ESDCIDUBE NOTE Ine Turn-of-Nut Method is the preferred metnod for tightening ASTM A325 and A490 bolts.
8.1 TENS!0NING SY TURN-OF-NUT KETHOD 8.1.1 Inspect all joint surfaces, including those adjacent to the bolt heads, nuts, or washers.
Ensure that all parts _ and surfaces are free of scale (except tight mill scale), burrt, dirt, and other foreign material that would prevent solid seating of the parts.
Clean, if necessary, 8.1.2 Install enough bolts to a " snug tight" condition so that the parts of the joint are brought into good contact with each other.
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Maintenance Procedure MM-6-012 Structural Bolt Tensioning Revision 0
-=a-wwxr:n ncmwmxsr.va,. s.
NOTE q
"Snus tight" is defined as tne tightness at-H
[
tained by a few impacts of an impact wrench or
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the full e'ffort of a can using an ordinary spud wrench.
e 8.1.3 Install the remaining bolts and tighten to " snug tight."
m=rsams
= arm _ -- _ _ - - - - - _ - - - - - -
CAUTION During tensioning there shall be no rotation of the part not turned by the wrench.
.._ - - - - = -
1 8.1.4 Solt tensioning shall progress systematically from the cost rigid part of the joint to its free edges.
8.1.5 Match mark the nut, bolt and the steel surface being bolted.
8.1.6 Tension all bolts in the joint by using the amount of nut rotation specified on Attachment 10.2, Nut Rotation for Tensioning by Turn-of-Nut Method.
8.1 7 Complete Attachment 10.4 Tensioning Data Sheet.
8.2 TENSIONING USING TORQUE OR IMPACT WRENCHES 8.2.1 Inspect all joint surfaces, including those adjacent to the bolt hea ds, nuts, or washers.
Ensure that all parts and surfaces are free of scale (except tight mill scale), burrs, dirt, and other foreign material that would prevent solid seating of the parts.
Clean, if necessary.
8.2.2 Install enough bolts to a " snug tight" condition so that the parts of the joint are brought into good contact with each other.
6 i
(taintenance Procedure MM-6-012 Structural Bolt Tensioning Revision 0
'N F::en-m -
- - e.,,xasm: nzmr a:n-nmw=-rmmar x:me neg NOTE
Snus tight " is defined as the tightness attained by a few impacts of an impact wrench or, the full effort of a man using an Ordinary spud wrench.
m 8.2.3 Install the remaining bolts and tighten to " snug tight."
8.2.4 Match mark the nut, bolt and the steel surface being bolted.
- -x3 CAUTION During tensioning there shall be no rotation af the part not turned by the wrench.
J me N 8.2.5 Starting from the most rigid part of the joint, use one of the methods listed below to tension each bolt:
8.2.5.1 Auto =atic Torque Control - Use of a torque control impact wrench with automatic cutoff, set to shut off at desired bolt tension in accordance with Attachment 10.3, Tensional Check of Torque and Impact Wrenches.
8.2.5.2 Stall Torque Control - Use of an impact wrench with air pressure regulation set to " stall" at desired bolt tension in accordance with Attachment 10.3, Tensional Check of Torque or Impact Wrenches.
8.2.5.3 Manual Torque Control - Use of a manual torque wrench to obtain arequiredaveragetorquevalueaspreviouslydetermingggonAt-tachment 10.3, Tensionci Check of Torque and Impact Wrenches.
8.2.6 Retension each bolt previously tightened to eliminate any relara-tion caused by the tensioning of adjacent bolts.
Q 7
6
Maintennnce Proceduro MM-C.012 Structural Solt Tensioning Revision 0 3.2.7 Verify nut rotation from " snug tight" is within the li=its specified on Attachment 10.2, Nut Eotatien for Tensionin6 Dy Turn-of-Nut Method.
3.2.8 Complete Attachment 10.4. Tensioning Data Sheet.
9.0 sEIEDIBIs N one 10.0 AIIALSBENIS 10.1 Structural Eolt Tennioning Chart 10.2 Nut Rotation for Tensioning by Turn-of-Nut Method 10.3 Tensional Check of Torque and Impact Wrenches 10.4 Tensioning Data Sheet 11.0 QQMMIIHEEIs_AND_3EEEEENCES
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FASTENER TENSION INa d d Bolt Si=e,
_M;_n g r estenar Ter_se-dr N usards of L?s tvi-e' Inches A325 Bolts A490 Bolts 1/2 l
13 16 l
5 /8 20 oc 3/4 l
Ec 17 7 /R Lt ei
- ('T 1
54 A7 1-1/3 50 Rt 1-1/4 79 Sn?
l-3/8 89 197 1-1/2 108 155 i
MM-6-012 Revision 0 9 0.1 (1 of 1) 4
NUT ROTATION FOR TENSIONING SY TURN-OF-NUT METHOD
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TABLE I Eolt length (fren N.-- - -< - w e ~ ~ - - fe e: s.c f.5.2 * * - - - "
to extreme end l
l underside of head g,,_.,
point).
' Both, faces nor-One fe.ce nor-Both faces slop-nal to bolt mal to bolt ed not more axis.(Use this axis and~other than 1.20 from column also if
" ace sloped notnernal to bolt beveled washer more than 1.20 a=1s (bevel has been ussd). (bevel washar washers not not used).
used).
Up to and includ-1/3 turn (A)* U./2 turn (L)* f/3 turn (C)*
a v. - --
Over 4 diameters, 1/2 turn (3)*
2/3 turn (C)* 5/6 turn (D)*
but not exceer'.'.ng S diameters.
Over 8 diameters 2/3 turn (C)*
5/6 turn (D)*
1 turn (E)*
.but not exceeding 12 diameters.
- Nut rotation fron " snug-tight" condition is relative to bolt, regardless of the element (nut or bolt) being turned. For bolts being installed by 1/2 turn or less, the tolerance
./
should be plus or =inus 30* for bolts installed by 2/3 turn and more, the tolerance should be plus or =inus 45' letters in parenthesis indicate telerance bands ' shorn 'oelow.
J FIG.i TOLERANCES FOR TURN-Oi: NUT METHOD 12 11 l
1 2
O C)-.
s.
0 C
B A
8 g
4 7
5 6
v MM-6-012 Revision 0 10 0.2 (1 of 3) 6
ctation for Tensioning Nut o by Turn-of-Net Method Iy.g r ri e r 't is desired to install ASTM A325, '-7/6" lcng by 3/ 4" dia=eter bolts.
1.
Deter =ine the ' number of diameters' as follows:
L = bolt length = 1-7/8" n
.D = bolt dia=eter = 3/4" L = Number of Diameters U
>-D4 L
i ? / 8 =.1E(.3 =.15 : a = 5 = 2.5
=
3/4 3/4 8
3 2
Nu=ber of diameters = 2.5
~
2.
From the value calculated r.bove (2.5), determine the correct row to use under ' Bolt Length' :in Table 1.
In this case, "Up to and including 4 diameters" is the correct row.
3.
Now determine from the figures below the relationship between the bolt head, nut and the seating surfaces.
COLUMN 1 COLUMN 2 COLUMN 3 i
li 5
?E b
II
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In this case, let's say that the bolt head and nut are parallel to the seating surfaces as in Column 1 above.
MM-6-012 Revision 0 11 0.2 ( 2 of 3 )
I:ut Rotation for Tensioning by Turn-of-Nut Method 4.
Usin6 Table 1 under Colu=n 1 (Both faces normal to bolt asis),
determine the amount of required nut rotation for the correct row (step 2).
Nut rotation - 1/3 turn This means that the nut should be tiSht'ened frem the ' snug-tig.ht' condition, 1/3 of a turn.
5.
The nut should be rotated as close to 1/3 of a turn as possible, however some tolerancea are allowed.
This tolerance is indicated by the
'A' under Column 1 and is shown in Figure 1.
This means that the nut should be rotated between 3 and 5 o' clock as shown by the shaded area labelled
'A'.
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l L*
MM-6-012 Revision 0 12 0.2 ( 3 of 3 )
l
TE!'SIONAL CMECK OF TORCUE AND IMPACT WRENCHES 1.
Bolt Grade:
2.
Solt Size:
_3.
Recommended Minimum Tension (Attachcent 10.1) kips Torque Wrench Check using the Skidmort Wilhel= Torque Test Machine, M&TE No.
(__
Later
)
A.
Perform three tests using three typical bolts and record the following:.
Tension Kips Torque Wrench Mini =um Actual Reading Required (measured)
(ft-lbs)
Test No. 1 T1=
Test No. 2 T2=
Test No. 3 T3=
B.
Calculate Average Torque (Tavg) as follows:
Tavg = T1 + T2 + T2 =
ft-lbs 3
s Torque Multiplier (s) M&TE No.
5 Impact Wrench Check using the Skid = ore-Wilhelm Torque Test Machine, M&TE No. (Later)
A.
Using a typical bolt (same diameter / length of bolts to be installed), perform a preliminary adjustment of the impact wrench shutoff.
B.
With the impact wrench shutoff adjusted, perform three tests using three typical bolts and record the following:
V MM-6-012 Revision 0 13 0.3 ( l of 2 )
i
Tension Kips Minimum Actual (!!easured) 2acut.-ed
- st Tropet W-e.neh Shutoff l
Test No. 1 Test No. 2 Test No. 3
'All ' actual (ceasured)' readings at shutoff =ust be greater than the
'tinimum required' and the difference between the highest and invest
' actual (=easured)' readings must be less than 15 of the ' minimum required.'
Performed By Date Revieved By Date Mechanical Maintenance Supervisor
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MM-6-012 Revision 0 14 0.3 ( 2 of: )
... - =
y TENSIONING DATA SMEET k.
Tensioned Item / Location
'l.
Stud / Bolt dia.
in.,
Qty 3.
.rinal tension reqet Kips, Per dwg Rev 4.
Required nut / bolt rotation turns.
5.
Sketch stud / bolt pattern and sequence numbers:
6.
Tensioning Data Tensioning Tensioning Tensioning Tensioning Bolt Completed Bolt Completed Bolt Completed Bolt Completed No.
(Initials)
No.
(Initials)
No.
(Initials)
No.
(Initials)
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\\s MM-6-012 Revision 0 15 0.4 ( 1 of 1 )
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