ML20126B751
Text
-,
" -2 ""**"*"c'"d e, ' r.*1 NUCPJar c'on'struction oepartment Procedure No.
A25X-51512-IPI Installation Procedure
Title:
'A'
& 'B' OTSG's STABILIZER TUBE ENDMILLING i
LIST'0F EFFECTIVE PAGES PAGE REV.
EFFECTIVE DATE EXHIBIT PAGE REV.
EFFECTIVE DATE 1
~
i 1.0 1
03/12/83 7.1 1.0 0
02/17/83 l
2.0 1
03/12/83 7.2 1.0 1
03/12/83 3.0 0
02/17/83 2.0 1
03/12/83 3.0 1
03/12/83 l
4.0 0
02f1W83 4.0 1
03/12/83 1
l 5.0 0
02/17/83 1
l 6.'O O
02/17/83 5.0 1
03/12/83 i
7.0 0
02/17/83
- 6. 0 1
03/12/83 8.0 0
02/17/83 7.0 1
03/12/83 8.0 1
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02/17/83 I
R EC EIV ED WA-ADL #
23~!
Page / Cheet
/ # 21 I l
t/AR 161983 WA # 4 2MDDZ G.KULL 51CNATURE TITLE / DIVISION /DFPARIMENT DATE
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'1.0' INTRODUCTION AND SCOPE 1.1 The purpose of thi's Installation Procedure is +3 machine the upper tube ends of those tubes selected for plugging and stabilizing to within no less than 30 mils above the upper tubesheet clad surface.
1.2 This Installation Procedure covers tube end milling only.. Actual insertion of stabilizer and welding in the OTSG will be performed under separate Installation Procedure.
2.0 REFERENCES
2.1 SP 1101-12-030 Rev. 8 OTSG Tube Plugging with Welded Caps and Stabilizers 2.2 AP_1020 RECEIVED 2.3 AP 1030 f.iAR 161983 2.4 AP 1042 G.KULL 2.5 GPUN Spec. SP 1101-12-039, Rey, 6 2.6 B&W Procedure 1140231 Rev. 0 (Individual Tube End M1111r.g. Tool Operation and Maintenance 2.7 DRF 8758 2.8 DRF 8784 2.9 A25J-51512-IP1, Rev.1 (Single Tube Endmilling) 3.0 RESPONSIBILITIES, 3.1 MAC Department is responsible for all aspects of this work.
3.2 Plant Engineering will provide assistance as required.
4.0-PREREQUISITES 4.1 OTSG Primary side drained and manways removed.
4.2 Tubes to be stabilized have been identified with hairpin markers..
4.3 Specific training on tube endmilling equipment must be i
accomplished prior to stabilizing tubes.
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2.0
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7, Rev. 0
. ;,7 4.4 - ALARA and RWP requirements have been satisfied.
4.5 - The Reacto'r must be in cold shutdown and depressurized.
4.6 Adequate lighting is available inside the upper head and tent and an air supply of 80 psi minimum is available.
-4.7 All tools and materials necessary to perform the machining are available with the tooling assen61ed and in proper working order.
4.8 Class C cleanliness is to be maintained. All' necessary tiaining is complete with sufficient manpower available to perform the required functions.
RECEIVED FEB 171983 5.0-SAFETY PRECAUTIONS G. KULL 5.1 All personnel performing the actual work described in this procedure, and related ones, should be thoroughly familiar with the procedures, the handling and operation of all special tools a
i S$1A 4tdst 4
safety precautions $. Th 1 H be. r and all applicabl and materials,ted. 40 PMclk Od pofGnM Wall %
ddWnera 5.2 Detailed handling, placement, operation and manner of use of af special tools and material shall be per the direction of the BW supervisor.
5.3 Assure that lower head cold leg plugs and lower dome drain plug are installed prior to any work comencing in the OTSG concerning tutie end removal, pygqg COPY 5.4 An enclosure shall be provided around the opening to the steam
' generator to ensure that any contaminated air is contained. This area shall be free from oil, scale, chips, wire, grease, chemicals and other foreign materials which may be detrimental to the primary system.-
WA-ADL #
UM Page / Sheet 3 of M wg g A2d-5/S/2
Rev. 0 5.5 During work performed in accordance with this procedure, proper control _ and inventory of all tools, equipment, materials and
- supplies shall be maintained to prevent their loss and/or inadvertent introduction into a system.
5.6 Adequate protection to personnel extremeties is to be provided to prevent injury and allow mobility over milled tube ends.
5.7 If tube end does not permit entry of pilot, tube end should be open(d using a manual reamer.
t 5.8 Lubricated tools will either exhaust outside the 0TSG or use an approved lubricant, per Ref. 2.5.'
5.9 Report the following to the Procedure Controller if they occur:
(A)
Any tube end, other than those identified, which are accidentally machined. 4 rs. u A r r, 7, 3
=/n/O (B)-
Any weld from an adjacent plugged tube which is machined during end milling.
Merr eu /rr, 7 3.
hygs 6.0
-INSTALLATION REQUIREENTS 6.1 Initial Conditions 6.1.1 A respiratory system capable of providing breathing air for tube end milling personnel is available at each OTSG manw y opening..
R A N b't " R R EC EiV E D 6.1.2 Access tents are erected around each manw w.
C Oy' *y' FEB 171983 6.1.3 Exhaust system must be installed and operating on the
~
primary side of the OTSG.
6.1.<
Two (2) each 115-volt 15 amp electrical receptacles for 3-prong, grounded plugs with ground fault shall be
' available at each OTSG head.
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WA-ADL #
Page / Shcot 8# *
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TEST TARGET (MT-3)
/,ft #4 IMAGE EVALUATION 4
tzzz (tzzzz I.0 l;assan E $ Na l.1
!.'- lE l.8 1.25 1.4 1.6 4
150mm 6"
+
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Rev. 0 6.1.5 Sufficient lighting shall be located inside each access
. tent with power cords of sufficient length to position the lights inside the 0TSG head.
(No unsecured electrical' connections in OTSG head.)
~
6.1.6 Comunications and video have been established and tested to ensure voice and visual contact betweer, the
-supervisory station (s) and inside the 0TSG head.
6.1.7 Tooling process area is set up and all milling units have been set up, adjusted, tested and recorded on the Single l
Tube Milling Tool Checklist (See Sample -- Attachment 7.1).
6.1.8 Tubes to be milled are identified on a marked tubesheet map.
6.1.9 Vacuum system available for cleaning upper and lower heads.
,g{-y 6.2 Tool Checkout During Production i
qq 6.2.1 Set up a process tent (controlled contaminated area) with a work area, plant air regulated 80-100 psi, depth R EC EIV E D calibration block.
6.2.2 Place calibration block on work table and install an $1 FEB 171983 G. 'KULL -.
insert to establish the desired.030" depth of cut.
j 6.2.3 Thread nuts onto hardstops and thread hardstops completely into the four locations on the underside of the fixture.
6.2.4 Assemble stabilizer legs and torque until snug. Thread stabilizer legs into underside of fixture until the shoulder cor} tacts and torque until snug.
WA-ADL # 33
.0 Page / Sheet WA # A2MU#
Rsv. 0 6.2.5 Orient hex collar on drive unit with hex cut out on fixture until the long axis of drive unit is perpendicular to fixture handle. (Different orientations may be required for some OTSG tubes.)
6.2.6 Thread clamp onto drive head and secure drive into i
position.
6.2.7 Place four fluted end mill on drive stock.
Insure detent pin is positioned properly using T-shaped tool that is supplied.
6.2.8 Orient stabilizer legs to the holes in the calibration blocks and fully insert.
6.2.9 Apply approximately 20 lbs force down on handle to insure h
that the float in drive unit is taken-up.
6.2.10 Look closely at the surface of the cal block and insure that the four fluted end mili is contacting the cal insert and that the hardstops are not contacting the cal block surface.
R EC EIV E D 6.2.11 Adjust each of the four hardstops so that they are just FEB 171983 resting on ca1 block surface and not lifting the end mili G. KULL out of contact with cal insert.
NOTE:1.t least two opposite hardstops are required if 7
recommended 4 hardstops can't be used due to OTSG i
interferences.
N g (
6.2.12 Carefully remove tool from cal block and snug nuts on hardstops to lock them in position. Insure that g y g., { l g
hardstops do not rotate with locknuts.
{yfy 6.2.13 ' Remove cal insert from cal block. Place tool once again d5 in cal block. Note any " rocking" on four hardstops. If y ;g *<3 so, repeat 6.2.8 through 6.2.13.
6.2.14 Re-calibrate tool after every cutter change-out or when a
y n.
a operator believes to have lost its calibration.
6.0 _
Rev. 0 6.3 Milling Process 6.3.1 Insure that a11' requirements of Section 6.2 have been met.
6.3.2 Locate tube end to be milled.
6.3.3 Locate milling unit directly over the hairpin marker.
Push hairpin marker down into the tube.
NOTE If a plugged tube obstructs the insertion of the stabilizer legs, one or two legs my be removed in order to mill that tube. A minimum of one leg MJST be in place 'at all times.
6.3.4 Place one hand on handle and the other on the drive trigger.
6.3.5 Start drive with end mill not contacting tube end. Once i
[
it is up to full speed, gradually make contact with tube l
l and ease up to a full feed force of approximately 50 lbs.
6.3.6 If considerable chattering is experienced, more feed is required.
6.3.7 Mill down tube end until all four hardstops rest flat on tubesheet (a pronounced lack of chattering will indicate this).
j fp,0,g.D NOTE: As tubes are milled, Procedure Controller to
- 7. >
[
(_,,. C /'(
indicate same on Attachment 7.3.
s/$
NOTE: For special situations, up to two hardstops may be removed, as long as the two remaining hardstops are R EC EIV E D opposite (180') one another. After special FEB 171983 situation milling is complete, the hardstops are to G.KULL be reinstalled and the fixture is to be recalibrated.
WA-ADL # _ _2N Page / Sheet - 7 #F 22.
WA # A25W~UNA
Rev. 0 6.3.8 Remove tool from tubesheet and repeat 6.3.2 through 6.3.8 until all tube endmilling is complete.
- NOTE: After milling is completed, pull hairpin marker
- back up (not out). Also, any hairpin markers that were pushed down by the milling unit legs shall be pulled up at this time.
6.3.9 If adjacent plugged tubes make it impossible to position end milling tool over required tube end, use Single Tube Endmilling Tool to machine tube ends to 0.030. inches 4 Ensure tool is set up properly per Attachment 7.4.
6.3.10 Upon completion of all endmilling, each tube shall be-checked with a GO-NO-GO Gage to verify that a sufficient e
RECEIVED amount of seal weld has been removed. The gage should rest on the tube's seal weld with a small amount of the
- FEB 171993 original weld showing outside the gage. Identify any G.KULL tube which does not meet this criteria on dttachment 7.5.'
6.3.11 After the tube is satisfactorily gaged, remove the hairpin marker from the tube. Record on Attachment 7.5.
6.4-Final Conditions
' I(
6.4.1 The OTSG has been cleaned of the debris caused by milling in both upper and lower heads and all tooling and 4
material have been removed from OTSGs.
% ii; N
- .8 N 6.4.2 All tubes listed on Attachment 7.2 have been milled t'o.no a un 1
}*-
less than a minimum of 0.030 inches above the tubesheet SA5 clad surface and satisfactorily gaged and/or discrepancies recorded 'and evaluated.
PLANNER i-
-7.0 ATTACHIENTS 7.1 Single Tube Milling - Tool Checklist (SAWLE)
COPY 7.2 List of Tubes to be Milled in 'A' and 'B' OTSGs 7.3 Tube Endmilling Tracking Sheet (SAWLE) i 7.4 Directions for Set-Up/ Operation of Single Tube Endmilling Tool
~7.5 GO-NO-GO Gage Test Results Sheet (SAWLE) 8.0 4v-e--
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ATTACHMENT 7.1 SINGLE TUBE MILLING - TOOL CHECKLIST Tool Number Date Time Calibration Block Serial Number
.,s
.1... Post Cutting Depth. Stop Set at
' 2.
Used Cutter Removed.
, S@
Too'ing Cleaned and Lubricated.
l 3.
4.
New Cutter Installed. Ensure Cutter is Tightened Jd e and Tool Holder is Tightensd in Chuck.
5.
Cutting Depth set at j@'
, %Y 6.
Operation Tested.
7.
Remarks.:
_ ad
,Y S
A
,Y r
Verified by Procedure Controller RECElvED FEB 171983 PLANNER c.xutt COPY
/
i PAGE 1.0 WA-ADL #
23-/
Page / Sheet 98722 WA n.AMX-F(T/5
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-1 ATNCKMsNT 1
Arr.
7 2-3, /. y,v. /
PART I.
orso A List OF TURES TO BE STABILIZED AlfD F1.UCCED R EC EIV E D EC INDICATMES FROK US+ 04* THRU 15TH Ts?
t/.AR 161983161983:V" G.KULE Row Tube now Tuba Row g
1, 1
9
- 25. 11 68 49.
24 95 2.
1 10
- 36. 13 3
50, 25 4
,3 2
10
- 27. 13 7
51.
25 95
?hO S2.
35 96
'2 4,
2 12 Q
5, 2
73
- 29. 13 72 J3.
25 97 4.
-3 30 30, 13 73 54.
26 97 7.
4 2
- 31. 13 74 55.
27 95 8.
4 3
31, 14 2
56.
24 100 j
f 9.
4 5
33, 14 72 57.
28 101 10.
4 36 34, 14 74 58.
29 93 11.
4 40 35.
18 al 59.
29 98 la '
85 60.
29 102
- 12 5
4 36.
11.
6 49 37, 19 86 41.
29 103 14 4
50 33.
20 79 62.
29 104 13.
7 43 39, 20 80 63.
30 19 40, 21 1
64.
30 96 14.
7 54 N k N
f 17.
8 3
\\
j 41, 21 39 65.
'30 103 S
I
)
18.
4 57 M
- 41. 22 86 46.
30 104 D
19.
9 60 l
- 43. 23 1
67.
31 64
)
i 44, 23 88 68.
31~
89
- j%i 20.
9 61 I c 45.
23 39 69.
3L 104
@ $ f 'l 21.
to 23 i
e 24 14 70.
32 105 h [ f j 46, 22.
10 27 23.
10 64 47.
24 91 71.
32 106
~
24.
10 65 48.
24 93 72.
33 106 8
- Suf E data at US + C5 less chan 270.
y..
Urr.
- 7. 2 PG, 2 -' 78Ve !
oTSC A R E.C EI y E D usT or tusr.s to_ss sTAstuzzo Awo n.ucaso MAR 161993' 1rc DrDIt'ATIWS FROM _US + 04* TWW 1STM TSP G.KULL g
- Tube, mow Tube
.4Ew,,,
Tube 73.
33 107 98.
41 113 123.
50 121 R
34 100 99.
4f 114 124.
30 122 m
34 104 100.
42 au 125.
31 113 76.
34 105 101 42-115 126; 51 119
~
77.
~3,4 106 102.
42 116
- 127, 31 120 73, 35 37 103.
'3 11' 128.
51 123 79.
36 104 104 43 115 129.
52 1
80.
36 108 105.
43 117 130.
53 125 51.
36 112 106.
44 114 131.
53 126 42.
37 R1 107.
45 US 132.
54 123 45 116 133.
54 124 43..
37 112 103.
84 -
37 114 109.
45 120 134.
$4 125 46 115 135.
54 127 85.
38 110 no.
46 116 236.
55 32 86.
38 in ul.
l 46 114 137.
55 121 87.
- 38 n3 112.
i 88.
.35 115 N
[
n3.
47 106 138.
55 126 N N I
47 119 139.
56 126 39.
39 111 114.
M k 47 120 140.
56 127 90.
.39 112 N
115.
D l
. ! u6.
47 122 141.
57 127 91.
39 116 i
- 15 N I
J y 48 2
142.
38 126
- c. v) %
- 117.
92.
40 D,
93.
40 112 Y 3
- 1114.
48 77 143.
54 125
< S <k 119 to i
3 49 121
.144.
39 32 94.
40 114 95.
40 115
.120.
49 122 145.
59 123 96.
40 116 121.
49 123 146.
60 Ih 97.
41
.1 122..
49 124 147.
60 127
- 6x1 E daRo se Us + 05 less chan 270'.
. W50 A rr. 7. 2 OTsc s 75.3 - Rev./
RECEIVED LIsr or Tunas to 3E STA3II.IZED AND FI.UGCED se tworcarrows 7 mom us + o4* tuna Isru Ts, t/$R 161983 G.KULL Eow Tube Row, Tube tow Tube 148. 62 126 173.
71 127 198.
83 129 169. 62 127 174.
73 124 199.
84 125 150. 62 128 175.
73 125 200 86 124
.151. 64 '
.125 176.
73 127 201.
46 129 152. 65 128 177.
74 118 202.
85 126 153, 65 129 178 74 122 203.
85 128 154 66 10 179.
75 120 204 85 130 155. 66 124 140.
76 117 205.
86 124 IS6. 66 128 181.
76 120 206.
86 129 l
.157. 66 130 182.
78 21 207 87 125 158. 67 124 143.
78 120 208.
87 126 159. 67 125 184.-
79 3
209.
87 130
\\
160. 67 127 185.
79.
125 210 88 126 161. 67 128 186.
79 127 211.
89 126 142. 68 126 187.
79*
128 212.
90 126 188 79 129 213.
90 125 163. 48 130 Y N; 164. 68 131 N N 189.
80 123 214.
91 70 165. 69 125 k h 190.
S'O 129 215.
91 121 166 69 126 N N 1
191.
81 125 216.
91
'113 N
167. 69 1275
.192.
81 126
- 217, 91 124 168. 69 124! dj%
193.
81 128 218.
91 125
- e 149. 69 129 fg4 194.
82 114 219.
92 93 170. 70 125-195.
82
'123 220.
92 94 171. 70 127 196.
82 129 221.
92 126 l
172 70 130 197.
42' 130 222.
92 127
- A11Xdata_at_US o CLloss than 170*. __ ___.,__ _ _____
..y Am 7. 2
% Ve-di*S7 /
ED list or Tunus to u sTAsn. Ira as twoce sc ImICATIONS MCM US + 04* TMU 1$TE TSP MAO 161983 G.KU(.!,
h Tub.
no.
,uts, 2.-
sw.
223.
92 128 249.
109 110 275.
224 95 t
224.
~92 129 250.
109 116 276 125 91' 225.
93 18 251.
110
,,, 1
, 277.
125 94 -
216.
95 h,25 252.
112 99 278.
126 41 227.
96 40 253.
112 107 279.
126
$8 228.
96 124 2 54.
113 3
280.
127 86 229.
96 1 26 255.
113' 106
.381.
128 49 230.
97 78 256.
113 110 6
231.
97 123 2 57.
114 106 281.
124 45 232.
97 125 258.
114 109 234 128 39
=W 233.
98 60 259.,
116 24
~_
234 98 123 260.
116 49 286.
129 2
235.
98 127 261.
116 107 287.
129 84 236.
99 223 262.
116
,110 288.
129 85 237. 100 123. ~
.263.
117 99 289.
130 45 238.
100
.124.
264 119 100 290.
130 56 Nh 165.
119 103 291.
130 90
- 239. 100 125 d N N
- 1266.
120 99 292.
131 83 240.
101 121j g
(9 247.
121 95 293.
131 87
'241, 101 123. N N
I 242.
101
- 124, 264.
121 97
- 294, 131 34 N
269.
122 98 195.
132 78 91'* * "g %
243. 102 Jc 244.
102 1'22 170 - 122 99 296.
132 SO e o 27 1.
123 94 197.
132.
83
'[ [ $
245.
103 122 246.
105 122 272.
123
'98 298.
132 84 247.
106 117 273.
124 90 299.
133 82
=
D ~..
RECEIVED
- ']~~
t.5AR 161983 A rr,
- 7. 2 G.'KULL '
y
?Ge SKYe Y LIST OF_ TUBES TO 31 STABILIEED AND* PLUGGED f.C INDICATIONS F1WM V5 + 04* THRU 15TM TSF
,now Tube
. Bow h
Row _
Tube 301.
134 69 326.
138 71
- 351, 244 33
- 302.
134 79 327.
138 71'.
352.
344 37
~~
303.
134 80 328.
138 73
- 353, 145 44 304.
134 34 329.
139 3
354.
145 45 305.
135 73 330.
139 72 355.-
146 5
306.
135 75 331.
139 74 356.
146 34
,307. 135 76 332 140 2
357.
146 46 308. 135 77 333.
140 63 358.
147 21 309. 135 79 334.
141 52 359.
147 21 1
. 310. 135 80 335.
141 41 360.
144 5
.311. 135 82
- 336, 141 63 361.
.145 24 312. 136 68 337.
141 67 362.
148 38 313 136 70 338.
141 68 363.
148 40 314 136 72 339.
141
-3 364.
149 4
315 136 74 340.
141 56 365.
150 7
316 136 75 M1.
141
.59 366.
150 12 N
42.
142 60 367.
150 14 317 136 78 d
\\
M3.
142 62 368.
150 26 318. 136 79 I ('
- 144, 141 64 369.
i Nig 150 27 319 137 74 g
320 137 75 lN
- ll45, 142 45 370.
151 6
a 9
321, 137 77 * ]jq
- M6.
143 45 371.
151 7
am 321 133 5
y ; % 347.
143 60 372.
151 13 l
c ' 2 <:3 345. 143 42
- 373, 37 113 w
t 3
323 138 57 314. 138 67 349.
144 9
374.
49
.2 325. 138 69 350.
144 46 373.
143 59
7,---~-----
F..'.
Arr, 7. 2 OTSG A j
fg, & - $6Ve LIST OF TURES TO BE STABIL,TZED AND PLUGGED BC IMDICATICWt FROM US + 0&* THRD ISTM TSP c
s.
Row Tub'e 376.
42 42 (See Note 1) 377.
' 73 40 (see Note.1) 374.
M 125 (See pote 1) 379.
143 58 (See nota 2)
R E C EI y E o, 380.
35 105 (See Note 2)
IOI0 351.
26 98 (see Note 3) 40 sti (Jaa uta4)
G.KULL
{.5tt.
? ::
s o.
.=.
ses.
19 pr.
n 43(m,4%
e n c s., - 4. c t d e s t W SiisJ 8 5 p.ppik70MS SS7 tot 100 C
s, cf3 o T1G 60 z./ $7 g
~,.
3"?.
- 7 7
- htEmsr M 3/IEl%
1
..3 h) 3 90.
30 15 '
)
s c.
j r.' Up
-l..TS o
= 1.
- Ol ll 9
-Y i;
II
. ;L
?? Y
' 00'.
gg.;,,qL y Face i.Shcot l5 Of
. sk p A27$' S/Sl2
- Sal NC data at US + 05 less than 17C',
[ ~~~
Arr. 7.2 7e, 7 - hv. /
s'_f'$T OF TUBES TO DE STABILIZED AND P1)UGCE EC INDICATIGriS FROM US + 04* TERU 13TR TSP j
notes Moce le 5.540 and Ami EC data in not in agreement for stabilisattes ariteria.
. Note 2:
Sal BC data ham en addicional indication that seguirew these subsa to'ba stabilised.
~
sore 3: Defect on 0.540 unable to be confirmed on as1.
Nota t' trkRLyQ 4efnets *4 @ ejm f eyo$ t}e.,1 Cat /thsanfAh I sand_
Naf4.
f.- 4 seps r.v. as,*g*,g4'JPa,
t a f what a edI Wafa
~
M8 hw'*k yN M**d & E deh W MMadh h>%
weh 4_t ya
&4@
eLa Hs,og'<4 t. % 4 p te cs~a.* k 9 s-es.n ts w r
- NM
- 9tYo T**t. A.t it!t'!stE , % rapad g pgg4 w,g g.g e..;
.~
?
R EC EIV ED tl.AR 161983161983'tf
.:y k ',.
G.KULL
.g,
...s, C) e.
e
.s behAL = V cr.ind 'rowl -
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P-RECEIVED AttAcoamr 1 MAR 161993
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FAar vz G.KULL LIsr or svass to 35 srAnu,IEED AMD MNOCED
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WBES 14CATED IN 1.ANE OR LAME WEDGE ARIA p<w orsc mou-w su prucT thCATrou A
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.ATTACIDipT 1 PART VII LIST OF TUBES TO DE STABILIEED AND PLUGGED REcggyyD Wm4 t.ower svAsiusses
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Sheet Cf ATTACHMENT 7.3 TUBE ENDMILLING TRACKING SHEET SHIFT DATE OTSG Tube Identified Marker Tool Used Row-Tube
& Endmilled Retrieved (Martin /B&W)
Comments 4
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RE CEIVED FE B 17 EC3 F
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PROCEDURE CONTROLLER Pcge / Sheet 2 0 0F 2 2.
WAw Agf.g_E.tE/,3
5 ATTACEMENT 7.4 Rev. O Directions For Set-Up/ Operation of Single Tube Endmilling Tool 1.
Adjust the UTS hardstop utilizing calibration block to a cutting depth of 0.030 inches. DO NOT MACHINE BELOW 30 MILS above the clad surface.
2.
Put 3-4 drops of lubricant into air inlet of motor. Turn on air motor and observe proper rotation and operation of cutting tool assembly. Turn off motor.
3.
Enter OTSG upper head and locate tube to be milled.
4.
Insert pilot of cutting tool into tube to be milled.
5.
Turn on air motor prior to contact with tube and. Mill until visual verification of hardstop contact is made with clad surface of UTS. Allow Air Motor to run until all cutting action has stopped. Shut off Air Ho-tor. Remove from tube.
8 I
RECEIVED FEB 171903 G. l',UU.
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