ML20198E865
| ML20198E865 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/04/1997 |
| From: | Comeroski M NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| References | |
| MP-745.0, NUDOCS 9708110040 | |
| Download: ML20198E865 (30) | |
Text
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- NDS Document Transmittal 8/4/97 To:
Nuclear Regulatory Commission Addressee Unique # 140 Document Control Desk ROUTINE distribution Washington, D.C. 20555 The following documents have been revised. You are currently on distribution for these documents. Verify that all documents are included in this distribution set.
DOCUMENT BEM COPlES MP 745.0 2
1
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9708110040 970004 PDR ADOCK 05000245 P
PDR Return this form to NDS, MP475,3rd Floor, C/O Rick Lundin (x2446) as soon as received.
fkff]f Signature Date:
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ig MILLSTONE NUCLEAR POWER STATION MAINTENANCE lytOCEDURE TBSCCW Heat Exchanger Tube Replacement MP 745.0 Rev. 2 STor
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THINK CT EVibW b
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{I Na Approval:
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YlT/ A, PORC Mtg. No:
/-99-//7 Date:
F-4-97 Effective Date:
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Level of Use SME: M. Comeroski General
Millske Unit 1 c['mx)' Maintenance Procedure TBSCCW Heat Exchanger Tube Replacement TABLE OF CONTENTS 1.
PURPOSE....................................................2 2.
P R E R E Q U I S I TES..............................................
2 3.
P R ECAUTI O N S................................................
6 4
I N STR U CTI O N S..............................................
6 4.1
%be Re m ova l............................................
8 4.2 Cleaning and Inspection...................................
9 4.3
%be I nst allat ion.........................................
10 4.4 Leak 1bst and Restoration................................, 17 5:
R EVI EW AN D S I G N - O FF....................................
21 6.
- R E FE R EN C ES...............................................
21 (Om)'
7.
S UM M A RY O F CI I ANGES....................................
22 ATTACHMENTS AND FORMS, "TBSCCW Heat Exchanger"........................
19, " Heat Exchanger Ebe Configuration"...............
24," Heat Exchanger Tbbe Replacement ids"............
26," Heat Exchanger %be Installation Data Record.......
27 n
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V MP 745.0 Level of Use ACT
, REVIEW Rev.2
'STOP THINK General 1 of 28
73
.1.
PURPOSE
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1.1 Objective The objective of this procedure is to provide instructions for replacing heat exchanger tubes in TBSCCW heat exchangers M4-14A and M4-148, 1.2 Discussion This procedure provides instructions to remove, clean, inspect, install, and test the heat exchanger tubes.
Typically, heat exchanger tubes that are plugged and those tubes which have failed eddy current testing are replaced.
This procedure also involves performing a boroscopic visual examination of TBSCCW heat exchanger internals, tube support baffles, impingement plate, and tubesheet ends.
1.3 Applicability This procedure applies to the following TBSCCW heat exchangers:
- Cx O
M4-14A: TBSCCW"A"lleat Exchanger M4-14B: TBSCCW"B"lleat Exchanger 2, PREREOUISITES 2.1 General 2.1.1 The shell and service water sides of TBSCCW heat exchanger that have been selected for retubing work have been isolated, drained, and tagged out.
2.1.2 Nuclear Materials Engineering has performed eddy current testing of all tubes not selected for replacement.
2.1.3 An tubes that failed eddy current testing have been identified on A.e.chment 3.
2.1.4 All replacement heat exchanger tubes are available and in sufficient quantity to complete the job. All tubes have been verified to be at least 240 inches.
(~h V
Level of Use MP 745.0 General sTop -
THINK ACT
, REVIEW Rev.2 2 of 28 l
2.1.5 If performing leak test using hydrostatic test rig, test rig, ho:,es, m
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fittings, and adapters have been tested for contamination and
'v' approved for use.
2.1.6 Unobstructed vent and drain paths have been established on the shell and tube sides of the heat exchanger.
2.1.7 Sufficient clearance (at least 23 feet) has been established behind the channel cover from which the tubes are to be removed and installed.
2.1.8 Personnel performing tube replacement have familiarized themselves with the following processes using sample tubes and a mock-up tubesheet:
%be handling
%be cutting Tbbe removal Tbbe rolling
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2.2 Documents L_)
2.2.1 MP 701.9," Shop Hydrostatic Pressure Test Procedure" 2.3 Responsibilities 2.3.1 Operations Department is responsible for filling and pressurizing shell side of heat exchanger when using system pressure to perform leak test.
2.3.2 System Manager is responsible for completing tube wall reduction calculations.
2.3.3 Nuclear Materials Engineering is responsible for the following:
Eddy current testing Boroscopic testing of tubes, tube support baffles, impingement plate, shell side internals, and tubesheet ends O
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Level of Use MP 745.0 GeneM ST P THINK ACT REVIEW Rev.2 3 of 28
2.3.4 Chemistry Department is responsible for the following:
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V Testing water prior to venting ant Jraining Testing hydrostatic test rig, hoses, fittings, and adapters for contamination (if hydrostatic test rig will be used to perform leak test) 2.3.5 licalth Physics Department is responsible for performing radiological testing of tubes prior to disposal.
2.3.6 hialntenance Services is responsible for providing guidance for disposal of removed tubes.
2.4 htensuring unt!'Ibst Equipment (hl&TE) 2.4.1 All hi&TE has been calibrated in accordance with WC 8, l
" Control and Calibration of hicasuring and 'll:st Equipment" and the calibration is current.
2.4.2 OA torque wrenches (click or dial type) with a rninimum accuracy and maximum torque wrench full scale value listed in the table below for the specified torque application range.
AV Specified Ibrque hiaximum 'Ibrque Wrench hiinimum Application 1(ange Full-Scale Value Accuracy 115 to 127 ftelbs lietween 150 and 300 fielbs 5%
2.4.3 Outside micrometer with a range of 0 to 1 inch and an accuracy of O.0005 inch such as OA-1568 1
p i.evel of Use hip 745.0 General 8#
REVIEW lleV. 2 4 of 28 t
I
i 2.5 hols and Consumables C
2.5.1
%ols (As Needed)
Adjustable pneumatic torgae wrench External tube cutter llent tube nose guide Internal tbe cutter, single-point type that leaves no cut ring in shell side of heat exchanger Mechanic's standard tool kit Parallel tube expander,with a minimum of three rollers Snap gage Soft-faced hanuner
%be puller with hydraulic hand pump or slide hammer 2.5.2 Equipment (As Needed)
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_ Compressed air source with necessary hoses, fittings, and i
dapters Sultable hydrostatic test fixture with necessary hoses, fittings, and adapters Vacuum with nonmetallic attachments Video camera and blank tapes -
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O EP N5.0 Level of Use
.ST P
.THINK ACT
, REVIEW Rev.2 Genemi 5 of 28
2.5.3 Consumables (As Needed) n\\
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All purpose cleaner such as Polywater liydrafoam 2020 Approved antiscize compound such as Nuclear-Grade Never-Scez Demineralized water supply Lint-free gloves Low-lint cloth 2.5.4 Spare Parts (As Needed)
Channel cover gasket, John Crane 2160 i
Ileat exchan thickness, %ger tubes (70/30 copper / nickel,0.049 inch wall inch OD)
- 3. PRECAUTIONS 3.1 Contact Chemistry, Ilealth Physics, and Environmental Services
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Departments for specific direc'tions before draining THSCCW beat V
exchanger.
3.2 7bbes must be adequatel, supported at all times to prevent bending or deformation. A minimum of two persons wearing lint-free gloves shall be used to move tubes.
3.3 It is recommended that the initial tube roll be performed at the lowest achievable torque value and adjusted incrementally upwards in approximately 6 in-lb increments. lb ensure consistency and tube expansion control, initial and subsequent tube rolling should be performed usmg the same pneumatic torque wrench.
3.4 Rolling equipment should be tested on mockup tubesheet if operation is questionable. Experimentation on installed tubes in tubesheet is not permitted.
3.5 llealth Physics must be contacted before using vacuum.
3.6 Maintain tube cleanliness and protect tubes from scratching and rubbing.
V Level of Use MP 745.0 General ST P THINK AT
, REVIEW Rev.2 I
6 of 28 I
J
3.7
%cuurn the internal area of the heat exchanger and use the boroscope as (m3
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necessary to locate and reinove filings (via tubesheet holes) following cutting.
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Level of Use MP 745.0 General STOP THINK ACT
, REVIEW Rev.2 7 of 28
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.. 4. - INSTRUCTIONS 4.1 Whe Memoval l Maintenance j' 4.1.1 IlEhiOVE channel head covers and cover gaskets from both ends of heat exchanger.
4.1.2 Refer % Attachments 2 and 3, and identify all tubes containing plugs.
l 4.1.3 RECORD tube identification number of all tubes that contain l
plugs onto Attachment 3.
4.1.4 Refer to Attachment 2 and DETERh11NE tube identification number of all tubes to be removed.
4.1.5 RECORD tube identification number of all tubes to be removed onto Attachment 3.
4.1.6 SELECT tube for removal, s
4.1.7 If installed, REhiOVE plugs from heat exchanger tube.
C A UTIO N Y
% prevent damage to components, cutter must not come in contact with adjacent tubes or tubesheet.
4.1.8 Using an internal tube cutter, CUT selected tube to a depth of 2 to 3 inches beyond shell side of tubesheet.
ALARA llcalth Physics Department must be contacted prior to use of vacuum.
4.1.9 CONSUllr with llcalth Physics Department, and, using a vacuum or compressed air, REh10VE cutting debris from cut tube.
4,1,10 INSERT tube puller into end of selected cut tube.
4.1.11 CONNECT hydraulic hand pump or slide hammer to tube puller.
O Level of Use hip 745.0 General ST P THINK ACT REVIEW Rev.2 i
S of 28
4.1.12 REMOVE tube.
O 4.1.13 INSERT tube puller into the opposite end of selected cut tube.
4.1.14 CONNECT hydraulle hand pump or slide hammer to tube puller.
4.1.15 REMOVE remaining tube section.
4.1.16 Visually INSPECT removed tube for evidence of wear,
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deformation, and defects.
4.1.17 IT i t'ocetion results are not satisfactory, RECORD tube menu 2 a'lon number and inspection results onto Attachment 4.
,u NOTE System Manager may request that the selected steps of this procedure be performed to support insertion of new replacement tubc(s) as necessary to maintain baffle alignment.
4.1.18 IE additional tubes require removal, Refer 'R) steps 4.1.6 through 4.1.16 until all specified tubes are removed.
O 4.1.19 CONSULT with Maintenance Services Department and DISPOSE of removed tubes and tube stubs.
4.2 Cleaning and Inspection 4.2.1 -.
REMOVE all chips, debris, and tube materials from tubesheet holes.
ALARA Ilealth Physics Department must be contacted prior to use of vacuum.
4.2,2 CONSULT with liealth Physics Department, and VACUUM filings and debris obseived inside heat exchanger to the maximum extent possible.
O MP 745.0 Level of Use General.
ST P THINK-ACT"
, REVIEW Rev.2 9 of 28
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NOTE Videotaping of boroscopic inspection is required periodicelly as deter-mined by Nuclear hiaterials Engineering.
Nuclear 4.2.3 PERFORhi boroscopic and visualinspections of the following, Materials and, E necessary, RECORD inspections on videotape:
Engineering
'Ibbes
'Ibbe support baffles Impingement plate
'Ibbesheet ends lleat exchanger shell side internals 4.2.4 RECORD inspection results onto Attachment 4.
l Maintenance l"
4.2.5 Visually INSPECT tubesheet and heat exchanger covers for wear, deformation, and defects.
4.2.6 RECORD inspection results onto Attachment 4.
4.2.7 E inspection results are not satisfactory REQUEST System hianager or FLS to provide instructions for further maintenance.
4.3 'Ibbe Installation NOTE 4.3.1 COPY Attachment 4 for each tube selected for replacement.
Maintenance 4.3.2 h1EASURE cach inlet and outlet tubesheet hole ID at three or System locations approximately 120 degrees apart, and RECORD as Manager
" Dimensions A, B, and C" onto Attachment 4.
4.3.3 AVERAGE the values for each tubesheet hole ID measured in step 4.3.2, and RECORD this average as " Dimension D" onto.
O Level of Use h1P 745.0 ST P THINK ACT
, REVIEW '
Rev.2 General 10 of 28
O c^orios 1b prevent bending and deformation, tubes must be adequately supported at all times. A minimum of tivo persons shall be used te move a tube at all times.
4.3.4 SELECT tube for insertion.
4.3.5 h1EASURE tube wall thickness on both inlet and outlet ends of selected tube, and RECORD as " Dimension E" onto.
C A UTION Nose guides must be tightly installed prior to tube insertion, and each tube must be supported at the free end during insertion.
4.3.6 SUPPORT tube at free end, and ATTACll nose guide to tube.
O Nore For case of installation tube may be lubricated with demineralized water.
Excess water must be wiped off with low lint cloth.
4.3.7 INSERT tube into the tubesheet, and POSITION tube such that inlet end is flush with tubesheet face and any extra tube length extends beyond outlet end of tubesheet.
4.3.8 CLEAN inlet end of tube and outer face of tubesheet.
4.3.9 h!EASURE tube inlet end ID and RECORD as " Dimension F" onto Attachment 4.
4.3.10 EXPAND inlet end of tubes as follows:
O Level of Use h1P 745.0 Genera ST P THINK ACT
,1EVIEW Rev.2 11 of 28 2
C A UTIO N Y The tube must not be expanded beyond the shell side of tubesheet, insert-ing the tube expander into the tubesheet more than 11/ inch can damage 4
tube and tubes icet.
ENSURE tube expander is set such that the depth of the roll a.
is 13/16-to 11/4 -inches into the tubesheet.
C A UTIO N Y Failure to allow tube expander to screw into tube may prevent tube from expanding as required b.
INSTALL tube expander into inlet end of the tube without pushing tubeinto tubcahect, and ALLOW tube expander to screw into tube, c.
EXPAND tube as necessary to achieve a target tube wall reduction of 4 to 8%, and RECORD pneumatic torque l'
wretich setting.
Pneumatic 1brque Wrench Setting:
NOTE The three lateral measurements must be made within the 13/16-inch ex-panded tube area in tubesheet, hicasurements should be taken at approxi.
3 mately /s,3/4, and 1 inch depths, d.
hiEASURE expanded tube ID at three locations, approximately 120 degrees apart and at three different lateral l
locations in expanded area, and RECORD as " Dimensions G,11, and I" onto Attachment 4.
e.
AVERAGE the expanded tube values obtained in step 4.3.10.d. and RECORD as " Dimension J" onto.
f.
htUI TIPLY " Dimension E" recorded in step 4.3.5 by two, and RECORD as " Dimension K" onto Attachment 4.
O htP 745.0 Level of Use
(
ST P THINK ACT
- REVIEW Rev. 2 General 12 of 28 l
i
,-.,.. _ ~., _,.., _.. _.,,. -..,,,....,,., =
--.._.,-.m._
g.
SUllTRACT " Dimension K" recorded in step 4.3.10.f. from jm
" Dimension D" recorded in step 4.3.3, and RECORD as
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" Dimension I" onto Attachment 4.
h.
SUllTRACT " Dimension 1" recorded in step 4.3.10.g. from
" Dimension J" recorded in step 4.3.10.e., and RECORD as
" Dimension M"onto Attachment 4.
i.
DIVIDE " Dimension M" recorded in step 4.3.10.h. by two, and RECORD as " Dimension N" onto Attachment 4.
J.
CALCULATE percentage of tube wall reduction for inlet end of tube as follows:
- 1) DIVIDE " Dimension N" reccrded in step 4.3.10.i. by
" Dimension K" recorded in step 4.3.10.f.
- 2) MUlfflPLY the results of step 4.3.10.J.1) by 200 and RECORD percentage of tube wall reduction as
" Dimension 0" onto Attachment 4.
NOTE ntj The target tube wall reduction value is between 4 and 876; however, a final tube wall reduction value of 4 to 1296 is acceptable, k.
IEless than 496 tube wall reduction is achieved, PERFORM the following:
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MP 745.0 Level of Use STOP THINK ACT
, REVIEW Rev.2 General 13 0f 28
Y CAUTION 1.
Unless System h1anager approval is obtained, the pneumatic torque wrench torque setting used to re-roll tube must not be more than two times the torque sett ng used during initial tube roll.
2.
1b ensure consistency and tube expansion control, initial and subsequent tube rolling should be performed using the same pneumatic torque wrench.
l 3.
Unless System Manager approval is obtained, no more than four roll passes (initial roll plus three re-roll passes) should be used to expand tube.
- 1) Using a slightly higher pneumatic torque wrench setting, EXPAND tube again and ENSURE applied torque does not exceed two times the initial pneumatie torque wrench setting recorded in step 4.3.10.c.
-2) Refer to steps 4.3.10.d. through 4.3.10.J. and CALCULATE percentage of tube wall reduction.
Ay NOTE The target tube wall reduction value is between 4 and 8%; however, a final tube wall reduction value of 4 to 12% is acceptable.
1.
E minimmn of 4% tube wall reduction cannot be achieved in four roll passes (initial roll plus three re-roll passes),
REQUEST System hianager to provide instructions for further maintenance,
- m. Egreater than 12% tube wall reduction is achieved, REQUEST System Manager to provide instructions for further maintenance.
E tube wall reduction is between 4 and 12%, Refer 1b steps l
n.
4.3.4 through 4.3.10.m., and INSTALL all tubes designated for replacement.
4.3.11 TRlhi outlet end of newly installed tubes such that each tube end 3 i is flush with or no more than /3 nch beyond outlet end tubesheet face, and ENSURE tube ends and tubesheet are not damaged.
O Level of Use htP m.0 General ST P THINK ACT
, REVIEW Rev.2 14 of 28
4.3.12 CLEAN outlet end of each tube and outer face of:ubesheet, g
V 4.3.13 MEASURE tube outlet end ID and RECORD as " Dimension F" onto Attachment 4, 4.3.14 EXPAND outlet end of tubes as follows:
Y C A UTIO N The tube must not be expanded beyond the shell side of the tubesheet, in-setting the tube expander into the tubesheet more than Ill -inch can 4
damage tube and tubesheet.
ENSURE tube expander is set such that the depth of the roll a.
is 13fu,-to 11/4 -inches into the tubesheet.
Y CAUTION Failure to allow tube ex expanding as required. pander to screw into tube may prevent tube from Ov b.
INSTALL tube expander into outlet end of tube without pushing tube into tubesheet, and ALLOW tube expander to screw into tube, c.
EXPAND tube as necessary to achieve a target tube wall reduction of 4 to 8%, and RECORD pneumatic torque wrench setting.
Pneumatic *Ibrque Wrench Setting:
NOTE The three lateral measurements must be made within the 13/16-inch ex-panded tube area in tubesheet. Measurements should be taken at approxi-mately /s,3, and 1 inch depths, 3
/4 d.
MEASURE expanded tube ID at three locations, approximately 120 degrees apart ar.d three different lateral locations in expanded area, and RECORD as " Dimensions G, II, and I" onto Attachment 4.
O MP 745.0 Level of Use General ST P THINK ACT REVIEW Rev. 2 15 of 28 4
AVERAGE the expanded tube values obtained in step
,3 c.
(d 4.3.14.d., and RECORD as " Dimension J" onto f.
h1UlJIPIX " Dimension E" recorded in step 4.3.5 by two, and RECORD as" Dimension K"onto Attachment 4.
g.
SUllTRACT " Dimension K" recorded in step 4.3.14.f. from
" Dimension D" recorded in step 4.3.3, and RECORD as
" Dimension ll' onto Attachment 4.
h.
SUBTRACT " Dimension 1" recorded in step 4.3.14.g. from
" Dimension J" recorded in step 4.3.14.e., and RECORD as
" Dimension ht"onto Attachment 4.
1 i.
DIVIDE " Dimension ht" recorded in step 4.3.14.h. by two, and RECORD as" Dimension N" onto Attachment 4.
l j.
CALCULATE percentage of tube wall: eduction for outlet end of tube as follows:
- 1) DIVIDE " Dimension N" recorded in step 4.3.14.i. by
" Dimension K" recorded in step 4.3.14 f.
V
- 2) h1ULTIPIX the results of step 4.3.14.J.1) by 200, and i
RECORD percentage of tube wall reduction as
" Dimension 0" onto Attachment 4 NOTE The target percentage of tube wall reduction is between 4 and 8G; however, a final tube wall reduction value of 4 to 12% is acceptable.
k.
1Eless than 4% tube wall reduction is achieved, PERFORh1 the following:
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Levelof Use h1P 745.0 Gened STOP THINK ACT
, REVIEW Rev.2 16 of 28
Y l
CAUTION 1.
Unless System hianager approval is obtained, the pneumatic torque wrench torque setting used to re-roll tube must not be more than two i
l times the torque settmg used during initial tube roll.
I 2.
'Ib ensure consistency and tube expansion control, initial and l
subsequent tube rolhng should be performed using the same pneumatic torque wrench.
3.
Unless System hianager approval is obtained, no more than four roll passes (inillal roll plus three re-roll passes) should be used to expand
- tube,
- 1) Using a slightly higher pneumatic torque wrench cetting, EXPAND tube again and ENSURE applied torque does not exceed two times the initial pneumatic torque wrench setting recorded in step 4.3.14.c.
- 2) Refer to steps 4.3.14.d. through 4.3.14.J. and CALCULATE percentage of tube wall reduction.
(Q) 1.
E minimum of 496 tube wall reduction cannot be achleud in four roll passes (initial roll plus three re-roll passes),
REQUEST System hianager to provide instructions for further maintenance,
- m. Egreater than 1296 tube wall reduction is achieved REQUEST System hianager to provide instructions for further maintenance, E tube wall reduction is between 4 and 1296, Refer 1b step n.
4.3.14 and EXPAND remaining outlet end tubes as required.
4.4 Leak Test and Restoration 4.4.1 NOTIFY Operations that shell side of heat exchanger is ready for leak test.
OV h1P 745.0 Level of Use General ST P THINK ACT
, REVIEW Rev.2 17 of 28
D NOTE (G
Chemistry must sample efuuent and request direction from 111' and Environmental Semces prior to discharging any effluent.
4.4.2 COOllDINN1'E filling and venting of shell side of heat exchanger and sampling of effluent with Operations and Chemistry Departments.
NOTE l
Leak testing can be performed using system water supply or hydrostatic test rig.
4.4.3 IE using system water supply, PEltFOlthi the following:
l operations l*
FILL and VENT shell side of heat exchanger.
a.
l Chemistry l*
b.
SAh1PLE cfnuent.
(~N l operations l*
IE required, FLUSil water from heat exchanger as necessary c.
V, to remove salt water contaminants.
l Maintenanco l*
4.4.4 IE using hydrostatic test rig, PERFOllhi the following:
a.
Using demineralized water FILL and VENT shell side of heat exchanger.
l Chemistry l
b.
SAh1PLE ef0uent.
l operations l
FLUSil water from heat exchanger as necessary to remove e.
salt water contaminants.
l Maintenanco l 4.4.5 Wi1EN 10 minutes has elapsed, INSPECT inlet and outlet tubesheets for leaks while discharge pressure is applied to heat exchanger.
4.4.6 IE any tubes leak at tubesheet, CONSUL!!'with FLS and System l Maintenanco j*
hianager, and REQUEST guidance regarding expansion of leaking tubes.
Ov Level of Use h1P 745.0 General ST P THINK ACT
, REVIEW Rev.2 18 0f 28
O NOTE v
Chemistry must sample effluent and request direction from llP and Environmental Semees prior to discharging any effluent.
4.4.7 COORDINN1'E draining of shell side of heat exchanger and sampling of effluent with Operations and Chemistry Departments.
4.4,8 PERFORh1 the following sir"ultaneously:
l operations I"
VENT and DRAIN heat exchanger.
I chemistry l*
SAh1PLE cffluent, i
NOTE Eddy current test results will be used to develop baseline for future evaluations.
(~'s Nuclear 4.4.9 PERFORh1 eddy curient testing of all new tubes.
Q Materials Engineering 4.4.10 VERIFY tube-to-tubesheet joints, and RECORD comments onto Attachment 4.
l Maintenance l*
4,4,11 CLEAN channel ateas.
4.4.12 INSTALL heat exchanger channel head cover gaskets.
4.4.13 INSTALL, but do not tighten, channel head fasteners, 4.4.14 REQUEST dual verification, and, using sequence shown on the channel head cover, TOROUE channel head cover fasteners to 121 fielbs (115 to 127 ftelbs),
4.4.15 RECORD the following onto Attachment 4:
lbrque value hi&TE serial No.
Calibration due date A
x Level of Use htP 745.0 General ST P THINK ACT
, REVIEW Rev.2 19 of 28
-J
y I operations l*
4.4.16 1 lL1, and VENT service water side of the heat exchanger, s
/
l Maintenance j*
4.4.17 INSI'liCT inlet and outlet channel covers for leaks.
4.4.18 IE leakage is detected, itEQUEST System hianager or 1:13 to provide instructions for further main aance.
4.4.19 ilECOltD any observations or remarks on AWO as necessary.
4.4.20 NOTIFY Operations Department that maintenance is complete.
l l
V
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V Level of Use h1P 745.0 General ST P THINK ACT
, REVIEW llev. 2 20 of 28
- 5. EliYllDV AND SION-OEE 5.1 The review and sign-off of the AWO and Attachments 3 and 4 satisfy the l
review and sign-off of this proceduro.
- 6. REFERENCliS 6.1 NNECo Accident Prevention hianual 6.2 Drawings 6.2.1 NUSco Drawing No. 25202-29026, Sheet 4," Front & Rear
%besheet Details T.ll.S.C.C.W. Ileat Exchanger h14-14A & B" 6.2.2 NUSCo Drawing No. 25202-26015, Sheet 3, " Piping and Instrumentation Diagram Service Water" 6.2.3 NUSCo Drawing No. 25202-26011, Sheet 1, " Piping and Instrumentation Diagram Wrbine Illdg. Secondary Closed Cooling Water" 6.2.4 NUSCO Drawing No. 25202-29026, Sheet 1," Secondary Cooling Water Exchanger" 6.3 Administrative Procedures 6.3.1 WC 8," Control and Calibration of hicasuring and 'Ibst Equipment" 6.4 hiaintenance Procedures 6.4.1 hip 701.9," Shop ilydrostatic Pressure Test Procedure" 6.5 Other Documents 6.5.1 NCR No.197-362,"TilSCCW lIcat Exchanger %besheet Dimensions" 6.5.2 NCR No.197-395 "'IP TilSCCW lleat Exchanger Apparent Wall Reduction Outside the Criteria Given in hip 745.0" 6.5.3
" Standards of %bular Exchanger hianufacturers Association" O
Level of Use h1P 745.0 General ST P THINK ACT
, REVIEW _
Rev.2
- 21 of 28 -
e
(m
- 7. SUhihjARY_OlLC&WGES
'O 7.1 Itevision 2 inco porates the following inodifications:
Added reconnnendation to use the saine pneumatic torque wrench for initial and subsequent rolling of the saine tube.
Changed desired tube wallieduction value froin 4 to 6 % to 4 to 8% A tube wall reduction value of 4 to 12 G is acceptable.
hiodified tube triin step to allow trinnning of newly installed
+
tubes such that each tube end is flush with or no nnote than /s 3
inch beyond tubesheet face.
Added direction that no rnore than four roll passes (initial roll plus three re-soll passes) should be used to expand tube unless Systern hianager approvalis obtained.
Added direction that the pneuniatic torque wrench tort ue setting used to re-roll tube Inust not be tuore than two tinics t ie torque setting used during latitial tube roll unless Systein hianaget appioval is obtained.
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h1P 745.0 Level of Use THINK.
Genera ST P' ACT REVIEW llev. 2
Attichment 1 TilSCCW llent Exchanger (Sheet I of 1)
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O 7450_a1 Level of Use MP 745,0 Olen0ral STOP THINK ACT
, REVIEW Rev.2 23 of 28
Attacliment 2 llent Exchanger'thbc Conf 1guration (sheci t or 2)
- 12 1-9
/
Itow l
-O OOOOOOdOOOOOO Row 2 000000000000000000 l
Row 3 0000000000000000000 6 - 22 Row 4 00000000000000000000
/
Rows O00000000000000000000 /
Itow 6 0000000000000000000000 l
Raw ?
00000000000000000000000 Itows 0000000000000000000000 Row 9 00000000000000000000000 Row l0 000000000000000000000000 Row 11 00000000000000000000000 Row 12 000000000000000000000000, 00000000000000000000000\\
Row 13 0000000000000000000000*12-24 Row 14 Row 15 00000000000000000000000 Rowl6 0000000000000000000000 Rowl7 000000000000000000000
\\
Rowl8 00000000000000000000 Row 19 0000000000000000000 000000000000000000'\\
Row 20
.000000000000000 Row 21 00000000000000 20-18 Row 22 000000000 Row 23 Row 24 000000 VIEW FROh! INLET END All references to tubes will use n unique number identiller. For exaniple, 6-22 indicates the tube is located in the 6th row from the top and the 22nd tube from the left when viewing the heat exchanger from the lulet end.
O Level of Uso h1P 745.0 General ST P THINK ACT
. REVIEW Rev. 2 24 of 28 j
Att chnient 2 Ileat Exchanger'Ibbe Configuration (Sheet 2 of 2)-
-9
- 1 -2 p
000000d0000000C Rowl 00000000000000000C Row 2 000000000000000000C Row 3 6 - 22 0000000000000000000C Row 4
\\ 00000000000000000000C Rows 000000000000000000000C Row 6 0000000000000000000000C Row?
000000000000000000000C Rows 0000000000000000000000C Row 9
- 12-24000000000000000000000000 Rowl0 N'V0000000000000000000000C 0000000000000000000000C Row 11 Row 12 0000000000000000000000C Row 13 0000000000000000000000 Row 14 00000000000000000000000
-Row 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0--
Rowl6 00000000000000000000C Rowi7 O
00000000000000000000 Rew l8 0000000000000000000
-Row 19 000000000000000000-Row 20
/
00000000000000C, Row 21
%-18 0000000000000C Row 22
~0 00000000C Row 23 00000C Row 24 VIEW FROM OUTLET END
- All references to tubes will use a unique number identiller. I'or example, 6-22 indicates the tube is located in the 6"' row from th: isp a id the 22n/
tube from the right when viewing the heat exchanger from the. illet ec 1.
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Att:cliinent 3 Ilect Exclinnger'Ibbe Itepl:ccinent ids (Sheet 1 of 1) g AWO No.
Local ID The following tubes have been selected for replacernent:
l (,
V Job Supervisor Date rm
)
Level of Use h1P 745.0 Genera ST P THINK ACT REVIEW Rev.2 26 of 28
O O
At ment 4 -
Ileat ExchangerTube Installation Data Record (Sheet I of 2)
Local ID
' Tube No.
AWO No.
(I)= Inlet end (O)= Outlet end Copy Attachment as Necessary Step Measurement Inlet Data Outlet Data
" Dimension E=
in
" Dimension K=
in 43.2(I)(O)
Tubesheet Hole ID
" Dimension B =
in
' " Dimension B"=
in
" Dimension C'=
in
" Dimension C"=
in 433(I)(O).
Average Tubesheet Hole ID
" Dimension D'=
in
" Dimension D'=
in 43.5(I)(O)
NewTube Wall Hickness
" Dimension E'=
in
" Dimension E =
in 43 9(I) 43$13(O)
Unexpanded Tube ID
" Dimension F'=
in -
" Dimension F'=
in
" Dimension G =
in
" Dimension G =
in 43.10.d.(I)
Expanded Tube ID
" Dimension H'= '
in
" Dimension H = -
in 43.14.d.(O)
~
" Dimension I'=
in
" Dimension 1 =
in 43.10.e.(I)
Average Expanded Tube ID
" Dimension J'=
in
" Dimension J'=
in 43.14.c.(O) 43.10.f.(I)
New Tube WallThickness times 2
" Dimension K =
in
" Dimension K =
in 43.14.f.(O) 43-10.g.(I)
Average Tubesheet Hole Minus (New Wall "D'
K"=
in "D" "K'=
in 43.14.g.(O)
Thickness x 2)
" Dimension U
" Dimension C 43.10.h.(I)
Average Expanded Tube ID minus {(Avg. Tube-
"J"
" C=
in "J'
" C =
in 43.14.h.(O) sheet Hole minus (New Wall Thickness x 2)}
" Dimension M~
" Dimension M-43.10.i.(I)
Average Expanded Tube ID minus { Avg. Tube-
"M'+2=
in "M'+2=
in 43.14.i.(O) sheet Hole minus (New Wall Thickness x 2))+2
" Dimension N'
" Dimension N' 43.10.j.(I) 200("N +"K')=
% 200("N'+"K")=
43.14.j.(O)
Percentage of Wall Reduction
" Dimension O'
" Dimension O' System Manger System Manager 4
x MP 745.0 Levelof Use
.gf vg,g mgy -g7 ger.,
General tV 27 of 28 m.
s e
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O O
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'V Attac nt 4 Heat ExchangerTube Installation Data Record (Sheet 2 of 2)
Step Inspection Acceptance Criteria
. u - -. By/
Verified By/
3 ate Date Boroscopic and visual inspection of the following-Tubes O
SAT O
UNSAT Tube Support Baffles O
SAT O
UNSAT NucI 4.23 Impingement Plate O
SAT O
UNSAT atate$ais Tubesheet Ends O
SAT O
UNSAT Engineering Heat Exchanger Shell Side Internals O
SAT O
UNSAT 4.2.5 Tubesheet and IIcat Exchanger Cover Inspection O SAT O
UNSAT 121 ft.Ibs 4~4~14 Channel Cover IIcx Nut Torque (115 to 127 ft.Ibs)
M&TE Serial No.
Cal. Due Date M&TE Serial No.
Cat Due Date COMMENTS' Job Supervisor Date Level of Use MP 745.0 t
ner. 2 myop,gr,y.
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General
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