ML20092G820
| ML20092G820 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 12/16/1988 |
| From: | GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-084-90, CON-IIT5-84-90, RTR-NUREG-1410 25270-C, NUDOCS 9202200367 | |
| Download: ML20092G820 (15) | |
Text
_ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ - _ _ _
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Vogtle Electric Gener63ng Fient 25270-C l.]
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STEAM CENERATOR N0ZZLE DAM CHECKOUT, INSTALLATION AND REMOVAL FOR INFORMATION ONLY REV.
REASONS FOR REVISION DATE O
New Frocedure 03/19/86 1
Incorporated TCP 86-1 03/28/56 2
Biennial per OF15-85/12fl6 10/13/56;_
3 Incorporated field consnen.ts.
03/Z5/85 cover sheet, INFO (57)MA6.1
_4 Change torque in Step 4.1.la, 10/03/58 4
change Steps 4.1.lb through h t.o reflect field consnents Separate Completion Sheets for Hot and Cold legs, add data sheet.
5 Respond to QA Surveillance 11/07/85 finding 1-55-15.
Change steps 4.1.5, 4.Z.Z, 4.3.5 add new
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figures I cnd 2.
,~~' 6 Add step 4.2.3 per IEN 85-36,
' conunitment 15375 dealing with hot leg vent path.
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e PacCCDU-E No f,EVl$lDN PAGE NO L
VEGP 25270-C 6
2 of 15 1.0 PURPOSE Thir procedure provides instructions for the che'ckout, installation and removal of the Steam Generator Nozzle Dams.
2.0 PRECAUTIONS AND LIMITATIONS 2.1 If only portions of the procedure are required:
2.1.1 Contact the Maintenance Foreman, 2.1.2 Use only the steps that apply.
the " Completion"ps used in the " Comments" section of Document the ste 2.1.3 or " Data" Sheet.
2.1.4 N/A the steps that were not used.
2.2 Steps in this procedure may be performed out of sequence only:
2.2.1 With prior approval of the Maintenance Foreman.
2.2.2 If they do not violate the intent of the procedure.
- 2. 2.3 -
Are documented in the " Comments" section of the
" Completion" Sheet.
2.3 Take appropriate action to minimize entry of foreign material into:
2.3.1 Steam generator channel head.
2.4 Prior to entering a vessel ensure Procedure 00258-C,
" Safe Work Procedures For Closed Vessels And Wet j
Locations" is followed.
2.5 For areas or zones requiring' documented accountability, see Procedure 00254-C, " Plant Housekeeping And Cleanliness Control".
2.6 Maintain area cleanliness in accordance with Procedure 20427-C, " Maintenance Cleanliness And Housekeeping Control".
1036e4
e PROCEDURE No.
[EididN PAGE No.~'
VEGP 25270-C 6
3 of 15 f
2.7 The nozzle dam may be in a radiation area, or may be radioactively contaminated.
IF SO FOLLOW THE INSTRUCTIONS ON THE RADIATION WORK PERMIT.
PREREQUISITIES AND INITIAL CONDITIONS 3.0 3.1 Prior to beginning work, nrtify QC if 3.1.1 Hold p'oints are indicated on the " Completion" AND/OR
" Data Sheet.
3.1.2 The MWO/ Work Package has a QC hold point.
3.2 Manway covers and diaphragms removed.
3.3 RCS has been drained to mid loop and clearance is in place in accordance with Procedure 00304-C, " Equipment Clearance And Tagging".
3.4 Ensuresecondarysideisdrainedasnecessarytokeep[
tube leakage to a minimum.
3.5 Ensure channel head has been drained.
3.6 Ensure the atmosphere is sampled per Procedure 00258-C.
" Safe Work-Procedures For Enclosed Vessels, Confined Spaces, Wet Locations and Systems".
3.7 Ensure cleanliness class is marked on MWO.
3.8 Ensure nozzle dams have-been hydro tested within the 90 days prior to use.
3.9 Ensure Section 4.1 has been completed prior to installation.
4.0 CHECKOUT. INSTALLATION AND REMOVAL 4.1 CHECKOUT 4.1.1 '
Perform pre-installation hydro test of the nozzle dam
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as follows:
a.
Place nozzle dam onto test fixture and torque (see installation step 4.2.8) to 175
- 25 ft.lbs.
souas
FRoCEDURE No.
REVISION PAGE No VEGP 25370-C 6
4 of 15 NOTES a.
Steps b thru h are recommended for filling the test fixture with water, b.
These steps may be deviated from provided the test fixture is not overpressurized and is completely filled.
b.
Open relief relve next to pressure gage at top of test fixture.
c.
Connect water source at bottom of test fixture and turn v. car supply on (Hydrotest inlet valve closed /
d.
Closethebottomdrainvalveandopeninletvalyk at bottom of test fixture to fill fixture with
- water, e.
When water has filled test fixturv and begins to overflow through top relief valves (1)
Close inlet valve at bottom first.
(2)
Close relief valve at top, f.
Open inlet valve at bottom ar, needed to bring pressure to 26 psig.
g.
Close inlet valve and hold pressure for 5 minutes.
(1)
Note any loss of pressure on Data Sheet, h.
open bottom drain valve.
i.
Open top relief valve.
j.
Remove nozzle dam from fixture and inspect gasket for any damage, k.
Test results are acceptable provided test pressure drop is less than 2 psig in 5 minutes.
4.1.2 Visually check for missing parts.
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4.1.3 Check cover surface for major defects such as holes,
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cracks, and obvious warpage.
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l MEDU-E No FEYtslON PAGE No VECP 25270-C 6
5 of 15 4.1.4 Visually check hold down bolts.
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a.
- Hold down bolts will thread freely through retaining blocks in both directions and will be positioned with upper thread engaged in the block prior to installation, b.
Bolts f6 and #16 are not to be engaged but instead will be loose in retainer to allow easier insertion through manway.
4.1.5 Check retaining blocks to ensure that they move
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freely on cover surface, and are oriented as shown on figure 1.
4.1.6 Check Belleville washers to ensure that they are
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intact and positioned two per bolt with. convex sides facing.
4.1.7 Check nozzle dam gasket for large cuts, cracks, and
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ply separations.
NOTE Bolt holes may be cleaned with stainless steel brush by rotating the brush counterclockwise.
4.1.8 Check hold down ring for damaged or dirty bolt holes.
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Clean as necessary.
4.1.9 Check to verify that the gasket is bonded to the dam,
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to prevent separation while handling, with the following exceptions:
a.
The gasket will not be bonded within 1 to 5 inches of each inside straight edge, b.
The gasket will not be bonded to the hinge area.
4.2 N0ZZLE DAM INSTALLATION NOTE Cold leg nozzle das must b's installed before installin'sI les nozzle dam.
hot 4.2.1 Verify that Prerequisites and Initial Conditions have
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been eet, rows
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pnoceDuns No.
LtyllloN PAuf No
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VECP 25270-C 6
6 of 15 4.2.2 Notify Shift' Supervisor of work to be perfort.ed.
[
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4.2.3 Endure a vent path for the hotlegs is provided prior to installing the hot leg paths. (Commitment 15738)
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4.2.4 Fold folding cover as shown in figure 2, ensuring j
t rubber gasket is folded inward.
[
4.2.5 Place folding cover through manvay into channel head and position against divider plate with hinges up.
4.2.6 Unfold cover and position it on hold down ring while aligning the bolt holes.
4.2.7 Start bolts in holes 3, 9, 13, and 19 but do not tighten.
4.2.8 Start remaining bolts in folding section but do not tighten.
l 4.2.9 Pass center piece of nozzle dam into the channel head-and position on hold down ring, a.
Engage remaining bolts in hold down ring.
NOTE It is not necessary to torque all bolts, A seal may be obtained by torquing every other bolt.
4.2.10 starting with bolt number 1 and moving clockwise torque
- /*-
bolts to 175
- 25 ft. Ibs, overlapping back to 1.
a.
Although the nozzle dam is typically installed with all-twenty bolts t'orqued,- only every other one is needed for proper installation.
r b.
No two adjacent bolts will be lef t uncorquad.
(See Figure 1)
NOTE Actual torque is to be determined by Maintenance Foreman: based on gasket thickness, site conditions and prior experience.
4 ms-
PeoCEDumE No CEY',56oN PAGE No VEGP 25370-C 6
4.2.11 Check nozzle' dams for leakage
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immediately following reactor cavity floodint a.'
Some leakage is acceptable provided it d exceed channel head draining capability.
i 4.3 N0ZZLE DAM REMOVAL NOTE i
Hot leg nozzle das must be removed before removing; t
cold leg nozzle dam.
4.3.1 Verify that all tools and debris are removed from
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channel head prior to nozzle dam removal.
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4.3.2 Verify that the primary system has been drained to mid
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loop.
4.3.3 Looten all hold down bolts.so that they are completeTy-i disengaged from the nozzle ring but still retained cn i
the Jam.
4.3.4 Verify that all parts are intact and will not fall into
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the nozzle upon nozzle dam removal.
(
4.3.5 Paes-center section of the nozzle dan out of the channel head.
Fold folding cover as shown in figure 2 ensuring rubber gasket is folded inward.
4.3.6 Remove the' folding cover from the channel head.
i 4.3.7 Visually check the channel head to ensure that all
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tools and materials have been removed.
4.4 Notify Shift Supervisor that required maintenance is
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complete.
5.0 ACCEPTANCE CRITERIA 5.1 Maintenance aerformed using this procedure is acceptable vsen:
5.1.1 The " Completion" Sheet is properly filled out.
5.1.2 Deviations from the procedure data and recommended settings have been reviewed on a case-by-case basis with'the' Maintenance Foreman, mm
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PMoCEDUQE No.
QEVISloN PAGE No.
VEGP 25270-C 6
8 of 15 5.1.3 Deviations have been ident.ified in the " Comments" section of the " Completion" Sheet.
5.1.4 The " Completion" Sheet has been approved.
1 5.1.5 Maintenance Work Orders have been written and submitted for conditions evaluated as needing attention.
6.0 REFERENCES
6.1 PROCEDURES 6.1.1 20427-C,
" Maintenance Cleanliness And Housekeeping Control" 6.1.2 00258-C,
" Safe Work Procedures For Enclosed Vessels, Confined Spaces, Wet Locations And Systems" 6.1.3 00304-C,
" Equipment Clearance And Tagging" 6.1.4 00254-C,
" Plant Housekeeping And Cleanliness ControE" 6.2 WESTINGHOUSE PROCEDURES 6.2.1 X6 ate 11-43 " Steam Generator Primary Nozzle Dam Instruction Manual" 6.2.2 X6AB11-44 " Pre-Installation Hydro-Test Of Steam Generator Nozzle Dam" 6.2.3 X6AB11-45 " Steam Generator Primary Nozzle Dam Installation / Removal Procedure" 6.3 Commitment 15378 - IEN 88-36)
END OF PROCEDURE TEXT e
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PttOCEDUQE NO __
QEVIS10N RAGE NO.
VEGP 25270-C 6
9 of 15 FIGURE 1 N0ZILE BAN A
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s et Je 3
AETAlWING CLIP i
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- PROCEDuc.E No.
REYlSION PAGE NO.
VEGP 25270-C 6
10 of 15 FIGURE 2 FOLD (D N0ZILE DAN RUS SER FOLDED,1NH ARD
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PROCEDU2E NO.
CEVISION PAGE NO, VEGP 25270-0 6
11 of 15
.6 DATA SHEET 1 N0ZZLE DAM HYDROTEST DATA SHEET 1.0 ST TIO TEST The following Nozzle Dame were pressurized and stabilized to 26/psig.
l Pressure loss did not exceed 2 pois in 5 minutes.
INITIAL /DATE INITIAL /DATE i
Nogale Das #
OK
/
Failed
/
Nozzle Dam #
OK
/
Psiled
/
1 Norale Das i OK
/
Failed
/
Nozzle Dam #
OK
/
Failed
/
Nozzle Das i OK
/
Failed
/
Nogale Den f OK
/
Failed
/
Nogale Dam #
OK
/
Failed
/
Nozzle Das i OK
/
Failed
/
Nogale Dam i OK
/
Failed
/
2.0 COMMENTS /RISOLUTIONS 3.0 SIGB-OFF The Nossle Dans identified above were hydrotested in accordance with Procedure 25270+C,Any exceptions / problems are noted above.
PERSON PERFORMXNG TEST
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'PROCEDU,,E NO.
i,EVISION VAGE NO.
VEGP 25270-C 6
11 of 15 DATA SHEET 1 N0ZZLE DAM HYDROTEST DATA SHEET 1.0 St TIO TEST The following Norrie Dams were pressurized and stabilized to 26/psig.
Pressure loss did not exceed 2 peig in 5 minutes.
INITIAL /DATE INITIAL /DATE Nozzle Dam f OK
/
Failed
/
Norsle dam i OK
/
Failed
/
Nozzl* Das F OK
/
Failed
/
Nozzle Dam i OK _
/
Failed
/
Norrie Dam #
OK
/
Failed
/
Nozzle Daa #
OK
/__ _ Failed
/
Nozzle Das i OK
/
Failed
/
Nozzle Dam i OK
/
Failed
/
Nozzle Das f OK
/
Failed
/
2.0 CONMENTS/RESOLITTIONS 3.0 SIGE-OFF The Nozzle Dans identified above were hydrotested in accordance with Procedure 25270-C. _Any exceptions / problems are noted above.
PERSON PERFORMINC TEST FOREMAN ms
4 VEGP go o oo g
12 of 15 Io s ou e-
' COMPLETION SHEET 1 COLD LEG PROCEDURE REVISION SHEET 25270-C 6
1 of 2 TAG NO.
DESCRIPTION Steam Generator Nozzle Dam SERIAL NO.
MANUTAU1GRER COLD LEG TEST EQUIPMENT USED METE
[] Safety Related/QC Hold Points
() Non-Safety Related PROCEDURE MAINT.
HOLD QC STEP DESCRIPTION INIT/DATE POINT INIT/DATE (Yes/No)
Pre-installation hydro 4.1.1 test
/
/
t Check for missing 4.1.2 parts
/
/
4.1.3 Check for-defects
/
/
4.1.4.
Check hold down bolts
/
/
4.1.5 Check retaining blocks
/
/
Check Belleville -
4.1.6 washers
/
/
.4.1.7 Check gasket
/
/
4.1.8 Check hold down ring
/
/
4.1. 9. '
Verify gasket-bonded
/
/
4.2.1 Frerequisites met
/
/
4.2.2 Notify Shift Supervisor
/
/
4.2.10 Torque to 175
- 25 ft-lbs
/
/
-4.2.19 Check for leaks
/
/
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PMoCEDURENO.
LEVIS 6cN PAQg NOI 1
VEGP 25270-C-6 13 of 15
... COLD LEG...
Sheet 2 of 2 COLD LEG COMPLETE SHEET 1 PROCEDURE MAINT.
HOLD QC STEP.
DESCRIPTION INIT/DATE POINT
_INIT/DATE (Yes/No)
Tools and debris 4.3.1 removed
/
/
Primary system 4.3.2 drained to mid loop
/
/
4.3.4 Verify parts intact
/
/
Visually check channel 4.3.7 head
/
/
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4.4 Notify Shift Supervisor
/
/
Coments/ additional hold points:
l.",
QC has reviewed this procedure for hold points Signature AFFROVED (
) DISAFFROVED (
)
COMPLEIsu BY DATE FOREMAN DATE 7t2444
VEGP soooooooo.
14 of 15 s
!U9!.kl9.!
- COMPLETION SHEET 2 FOT LEG PROCEDJRZ REVISION SMEET 25270-C 6
1 of 2 TAG NO.
DESCRIPTION Steam Generator Nozzle Dam EEKIAL NO.
MANUFALAURER HOT LEG TEST EQUIPMENT USED METE
[] Safety Related/QC Hold Points
[] Non-Safety Related PROCEDURE MAINT.
HOLD QC STEP DESCRIPTION INIT/DATE POINT INIT/DATE (Yes/No)
.,[I Pre-installation hydro 4.1.1 test
/
/
Check for missing 4.1.2 parts
/
/'
4.1.3 Check for defects
/
/
4.1.4 Check hold down bolts
/
/
4.1.5
' Check retaining blocks
/
/
Check Belleville 4.1.6 washers
/
/
4.1.7 Check gasket
/
/-
4.1.8 Check hold down ring
/
/
4.1. 9. '
. Verify gasket bonded
/
/
-4.2.1-Prerequisites met
/-
/
4.2.2 Notify Shift Supervisor
/
/
4.2.3 Ensure vent path
/
/
4.2.9-Torque to 175
- 25 ft-lbs
/
/
4.2.10 Check for leaks
/
/
VEGP Woooooooo.
14 of 15 s
!U9!.W9.!
- COMPLETION SHEET 2 NOT LEG REVISION SMEET PROGEDg 25270-C -
6 1 of 2 TAG NO.
DESCRIPTION j
Steam Generator Nozzle Dam SERIAL NO.
MANUFAL1URER MOT LEG TEST EQUIPMENT USED METE
[] Safety Related/QC Hold Points
() Non-Safety Related PROCEDURE MAINT.
HOLD QC STEP DESCRIPTION INIT/DATE POINT INIT/DATE (Yes/No)
Pre-installation hydro 4.1.1 test
/
/
Check for missing 4.1.2 parts
/
/
4.1.3 Check for defects
/
/
4.1. 4 -
Check hold down bolts
/
/
4.1.5 Check retaining blocks
/
/
Check Belleville 4.1.6 washers
/
/
4.1.7 Check gasket-
/
/.
4.1.8 Check hold down ring
/
/
4.1. 9.
- Verify gasket bonded
/
/
4.2.1 Prerequisites met
/
/
4.2.2 Notify Shif t Stipervisor
/
/
4.2.3 Ensure vent path
/
/
4.2.9 Torque to 175
- 25 ft-lbs
/
/
'4.2'.10 Check for leaks
/
/
a,
1 L-.oCEDU E NO, LEVISION PAGE NO.
VEGP 25270-C 6
15 of 15
- HOT LEG ***
sheet 2 of 2 HOT LEG COMPLETE SHEET 1 PROCEDURE MAINT.
HOLD QC STEP.
DESCP.IPTION INIT/DATE POINT INIT/DATE (Yes/No) 4.3.1 Tools and debris removed
/
/
4.3.2 Primary system drained to mid loop
/
/
4.3.4 Verify parts intact
/
/
4.3.7 Visually check channel head
/
/
4.4 Notify Shift Supervisor
/
/
Co=sents/ additional hold points: _
9 QC has reviewed this procedure for hold points Signature APPROVED (
) DISAPPROVED (
)
COMPLETEU BY DATE FOREMAN DATE
-