ML20214X132
| ML20214X132 | |
| Person / Time | |
|---|---|
| Site: | 07109073 |
| Issue date: | 04/21/1987 |
| From: | Bush F, Mccoy S LN TECHNOLOGIES CORP. (FORMERLY LONDON NUCLEAR SVCS |
| To: | |
| Shared Package | |
| ML20214X115 | List: |
| References | |
| WM-022, WM-22, NUDOCS 8706160344 | |
| Download: ML20214X132 (15) | |
Text
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1 of 15 TITLE 1
LN-142 MAINTE?'ANCE TECHNOLOGIES
.C o APo A ATION 6
COPYPIGHT C 1987 BY LN TECliNOLOGIES CORPORATION ALL RIGHTS RESERVED.
NO PART OF THIS DOCUMENT MAY BE REPRO-DUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECllANICAL, INCLUDING PHOTOCOPYING, RECORDING OR BY ANY INFORMATION STOR.\\GE AND RETRIEVAL. SYSTEM, WITHOUT PERMISSION IN KRITING FROM LN TEC11NOLOGIES CORPORATION, EXCEPT FOR STRICTLY CONTROLLED DISTRIBUTION, FQR EVALUATION PURPOSES.
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F O R i.,1N AT O R DATEl CHECKED DATE 0 /8 OATE MANAGER DATE
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2 of 15 WM-022 TABLE OF CONTENTS Page l
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3 1.0 PURPOSE 3
2.0 APPLICABILITY 3
3.p DEFINITIONS 4
4.0 REFERENCES
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4
, - 5.0 RESPONSIBILITIES 4.'
. s.
5 6.0 TOOLS'~ANClMATERIAds s
5 hERIODICMAINTENANCEREQUIREMENTS 7.0 3
7 4'
8 '. O GASKET / SEAL REPLACEMENT'
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7 8.1 Primary Lid Gasket Replacement 8
8.7[ Secondary Lid Outer Gasket Replacement y
9 8.3 Secondary Lid Inner _ Gasket Replacement Secondary Lid Ho'iddown'sItud and Nut Replacement 9
8". 4
.s 1
9 8.5 ' Ratchet Binder Repair dr. Replacement
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.e, 11 9.0"]DISTRIB0TIONO'FMAINTENANCERECORDS 1.
t 12 Attachment'l i
4 13
'4 I i Ati'achment 2 14 Attac.hmen.t 3 15 b Att.achment 4 E
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REVISION PAGE WM-022 F
3 of 15 1.0-PURPOSE This procedure establishes preventative maintenance requiremente and describes the cor rect methods for gasket, secondary lid stud and ratchet binder replacement on the LN-142 shipping cask.
2.0 APPLICABILITY s
- This procedure shall be followed when per forming maintenance on an LN-142 shipping cask.
This procedure may be used in its entirety as is or incorporated into the policies and procedures of a registered user.
3.0 DEFINITIONS 3.1 Primary Lid Gasket -.75" thick by 3.00" wide:
Silicon 3.2 Secondary Lid Outer Gasket -.25" thick x 1.00" wide:
Neoprene 3.3 Secondary Inner Gasket -.25" thick x 1.00" wide:
Silicon 3.4 Ratchet Binder 3/4" x 10' Type J:
160,000 lbs.,
minimum break strength 3.5 Secondary Lid Stud - Driver Type Stud 1" - 8 UNC-2A:
ASTM A320 GR. L7 3.6 Secondary Lid Retaining Nut - Hex nut 1" - 8UNC-2B:
Com'L 3.7 Secondary Lid Alignment Guide Pin
.75" Dia.:
ASTM A-516, GR 70 3.8 Primary Lid Alignment Guide Plate - On cask body.50" thick:
ASTM A-516, GR 70
NO.
REvlSION PAGE WM-022 F
4 of 15
4.0 REFERENCES
4.1 QA-001, " Procedure and Instruction Preparation and Control" 4.2 WM-021, " Operating Instructions for Loading and Unloading the LN-142 Shipping Cask" 4.3 U.S. Nuclear Regulatory Commission Certificate of Compliance No. 9073.
4.4 U.S.N.R.C., Safety Evaluation Report on Model No.
NUS-OH-142 shipping cask Docket No. 71-9073.
4.5 AD-002, " Inventory Control" 4.6 AD-001, " Procurement Control" 4.7 WM-011, " Soap Bubble Leak Test - LN Technologies Type A Shipping Casks" 4.8 LN Drawing No. E-9414-M-3204 5.0 RESPONSIBILITIES 5.1 LN Transportation Supervisor - Project Manager -
overall responsibility for cask maintenance operations.
5.2 LN Technologies Shop Manager -
Cask Maintenance Manager - responsible for the performance of.all required cask maintenance. Procurement of gasket and other replacement parts.
All cask replacement parts are procured and controlled in accordance with LN Procurement Control Procedure No. AD-001.
5.3 Buyer - Procurement, storage and issuing of quality control materials as directed by the Shop Manager.
5.4 Quality Assurance Representative of the Registered Users Organization shall ensure that cask maintenance performed at the registered user's site (by other than LN personnel) is accomplished in accordance with that registered users NRC approved 10 CFR 71, Subpart H,
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REVISION PAGE WM-022 F
5 of 15 Quality Assurance Program. shall be completed by the registered: user 's Q. A.
Representative _-
when such maintenance is performed.
6.0 TOOLS AND MATERIALS 6.1 Gaskets 6.1.l' Primary Lid 6.1.2 Shield Plug (Outer / Inner) 6.2 Ratchet' Binders 6.3 -Secondary Lid Studs 6.4. Secondary Lid Nuts 6.5 Gasket' Scraper or clean metal scraper knife 6.6 Steel wire brush - drill type or hand held 6.7 Acetone 6.8. Gasket adhesive:
Silicon Lube (RTV) GE 10-8101~or other brand adhesives which are recommended by the manufacturer for bonding silicon or neoprene to metal.
17.0 PERIODIC MAINTENANCE REQUIREMENTS 7.1 Primary Lid Gasket Silicon 7.1.1 Inspect primary lid gasket prior to placement of the primary lid on the cask.
Gasket must be free of defects such as nicks, frays and cuts (Reference 4.2) which would affect proper sealing.
7.1.2 Replace gasket every twelve months as per C of C.
7.1.3 Replace gasket to correct any defects noted in step 7.1.1 or to comply with 7.1.2 above (Refer to step 8.1).
7.2 Shield Plug Gaskets (Outer / Inner) 7.2.1 Inspect secondary lid gaskets.
Gaskets must be l
free of defects such as nicks, frays and cuts
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-l 1
NO.
REVISION PAGE WM-022 F
6 of 15
.(Reference.4.2) which would affect proper sealing.
7.2.2 Replace gaskets every twelve' months as per C of C.
7.2.3 Replace ' gaskets to cor rect any defects noted in step 7.2.1 or-to comply with 7.2.2 above.
Refer tol8.2 or 8.3 as necessary.
7.3 Secondary, Lid Holddown Studs and Nuts 7.3.1 Inspect studs for excessive wear or cross threading.
7.3.2 Inspect nuts for wear caused by cross threading or over torquing.
7.3.3 Repair or replace studs and/or nuts as necessary-(Refer to 8.4).
7.4 Ratchet Binders 7.4.1 Inspect binders.
Check for freedom of movement and locking action.
7.4.2 Check ratchet binder handle storage straps for dry-rot or breaks.
7.4.3 Repair or replace as pecessary.
Refer to step 8.5.
7.5 Secondary Lid Guide Pins and Marks 7.5.1 Inspect secondary lid guide marks prior to each shipment for paint flaking or fading.
7.5.2 Inspect secondary lid guide pins for excess wear, whenever secondary lid has been removed.
Pin should engage secondary lid when lid is installed on primary lid.
7.5.3 Repaint secondary guide marks as necessary.
7.5.4 Repair or replace secondary lid guide pins as necessary.
Refer to step 8.4.
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NO.
REvl3 TON PAGE
'WM-022 P
7 of 15 7.6 Cask to Transport Trailer Tiedown Cable Assembly 7.6.1 Inspect prior to each shipment.
7.6.2 Innpect tiedown cables for broken or frayed wire.
7.6.3 Inspect tiedown ratchet binders for security and lubricate.
7.6.4 Inspect transport trailer cask tiedown lugs for obvious cracks.
7.6.5 Repair and/or replace as necessary.
7.7 Leak Test of Cask 7.7.1 Required prior to acceptance from fabricator.
7.7.2 Required af ter maintenance has been per formed on any gasket.
7.7.3 Refer to Reference 4.7,
" Soap Bubble Leak Test --
LN Technologies Type A Shipping Casks", WM-011 8.0 GASKET / SEAL REPLACEMENT 1
(
8.1 Primary Lid Gasket Replacement (Silicon) 8.1.1 Remove old flat gasket by hand or use metals cr. aper, using care to prevent damage to seating sur faces. Discard old gasket material using proper radiological procedures.
8.1.2 Clean entire gasket seating surfaces (both cask body and lid) by using a steel wire brush along with acetone as a cleaning solvent and lubr icant.
8.1.3 Inspect all seating surfaces for foreign material or nicks which would prevent proper seating and sealing.
8.1.4 Inspect new replacement gasket for nicks, frays and cuts.
Discard unusable materials.
8.1.5 Fit gasket to cask body surface.
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.NO REVISION PAGE WM-022 F
8 of 15 8.1.6 Place -gasket adhesive on cask body in accordance with adhesive directions.
8.1.7' Press gasket into adhesive with hand pressure and allow time recommended on the adhesive ~
directions for the adhesive to set up.
8.1.8 Make butt joints using adhesive between the two gasket surfaces.
Compress to fit.
See Figure 1 for recommended gasket joint method.
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.t s.a.t o.s.n 8.1.9 Complete attachments 1 and 4 (if applicable) and distribute-in accordance with Section 9.O.
8.2 Secondary Lid Outer Gasket Replacement (Neoprene) 8.2.1 Remove old flat gasket inr hand or use metal scrapper.
Use care to prevent damage to seating surfaces.
8.2.2 Clean entire gasket geating surfaces.(both primary lid and shield' plug) by using a steel wire brush along with acetone as a cleaning l
solvent and lubricant.
8.2.3 Inspect all seating surfaces for foreign material or nicks which would prevent proper sealing.
8.2.4 Place adhesive on primary cask lid, press gasket in place and allow to set until adhesive is set.
8.2.5 Complete attachments 2 and 4 (if applicable) and distribute in accordance with Section 9.0.
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ret 9SION PAGE l ~
W:4-022 P
9 of 15 -
8.3' Secondary Lid Inner Gasket Replacement (Silicon) 8.3.1 Remove old flat gasket by hand or use metal scrapper using care to prevent damage to L
seating surfaces.
8.3.2 Clean entire gasket seating surfaces'(both primary lid and secondary lid) by using a steel wire brush.along with acetone as a cleaning
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solvent and lubricant.
8.3.3 Inspect all seating surfaces for foreign material or nicks which would prevent proper sealing.
8.3.4 Place adhesive on primary cask lid inner gasket seating surface.
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8.3.5 Place gasket on primary cask lid inner gasket seating surface and press in place and allow to set until adhesive is set up.
8.3.6 Complete attachments 3 and 4 (if applicable) and distribute in accordance with Section 9.0.
8.4-Secondary Lid Hold Down Stud and Nut Replacement Secondary lid studs may be replaced and/or repaired in the following manner 8.4.1 Heli-coil insert O.4.2 Increase depth of tap, drill and retap 1/4"
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using 1" - 80NC-2A stud of appropriate length.
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Material as specified in LN Drawing No.
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l E-9414-M-3204, Sheet 2 of 2, Item 16.
8.4.3 Complete attachment 4 (if applicable) and distribute in accordance with Section 9.O.
8.5 Ratchet Binder Repair or Replacement 8.5.1 If ratchet binder binds before primary lid is tightly secure, then perform the following:
L
r NO REVISION PAGE.
'WM-022 F
- 10 of 15 a.
' Extend ratchet binder far.enough to remove spring pin and threadless bolt.
- b. - Lean ratchet ~ binder outward away from cask and extend out to full length.
Be careful not to spin lug ends totally out of binder.
c.
Clean old lubricant and contaminates from threads using a steel brush.
d.'
Install new all purpose lubricant on threads and rotate binder ends all the way into the binder.
e.
Extend binder ends.back to the length necessaryf to reinstall the threadless bolt and spring pin.
f.
Re-tighten down primary lid using ratchet binder.
- 8. 5. 2.
If the above steps did not repair ratchet binder, then per form.the followings a.
Loosen binder enough to remove-the spring pin and threadless bolt.
b.
Remove the cotter pin,. nut and bolt on lower end of bind.er.
c.
Remove the ratchet' binder and ship to LN Technologies, Columbia, South Carolina for additional maintenance.
d.
Install new ratchet binder on cask by installing bolt through lower end of binder.
e.
Reinstall nut on bolt using a new cotter pin.
f.
Reconnect upper end of ratchet and tighten down in accordance with Reference 4.2
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NO.
REVISION PAGE-F 11 of 15 WM-022 g.
Complete attachment 4 ' (if applicable) and distribute in accordance with Section 9.0.
9.0 -DISTRIBUTION OF MAINTENANCE RECORDS
-t 9.1.
Send.origsal copy of Attachments 1,2,3, and'4 to
'LN Technologies, Columbia, SE office, c/o Transportqtion Supervisor.
9.2 Retain one copy for registered User 's ~ Cask Manual.
9.3 Additional copies, as may be required, are authorized for registered user's use only.
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NO.
REvlSION PAGE WM-022 F
.12 of 15 LN 142 Primary Lid Gasket Replacement Checklist Cask Serial Number:
Initials Date 1.
Old gasket removed 2.
Gasket seating surfaces clean and free of foreign material and nicks.
(Step 7.1.3) 5 3.
Replacement gasket acceptance (Step 7.1.4) 4.
Gasket Inventory No 5.
Installation completed (Step 7.1.5 thru 7.1.8) 6.
Gasket replaced and provided in accordance with maintenance Procedure Number WM-022.
Signature Date 7.
Visual inspection of painted alignment guide plates satisfactory?
Yes/No Alignment guide plates repainted?
Yes/No Signature Date 8.
Other Maintenance (describe):
9.
A.
Next scheduled gasket replacement due by:
Date B.
Leak Test of lid gaskets per formed in accordance with WM-Oll.
Next leak test due by:
Date Signature Date 1
7 NO.
REVISION PAGE WM-022 F
13 of 15 LN 142 Shield Plug Outer Gasket Replacement
-Checklist Cask Serial Number:
Initials Date
- 1.
Old gasket removed (Step 7.2.1) 2.
Gasket seating surfaces clean and' free of foreign material and nicks.
5 (Step 7.2.3) 3.
Replacement gasket acceptance 4.
Gasket Inventory No:
5.
Installation completed (Step 7.2.4 thru 7.2.5) 6.
Gasket replaced and provided in eccordance with maintenance Procedure Number WM-022.
Signature Date 7.
Visual inspection of painted alignment markers satisfactory?
-Yes/No Alignment markers repainted?
Yes/No Signature Date 8.
Other Maintenance (describe):
9.
A.
Next scheduled gasket replacement due by:
Date B.
Leak Test of lid gaskets per formed in accordance with WM-011.
Next leak test due by:
Date Signature Date
NO.
REVISION PAGE F
14 of 15
.WM-022 l
LN 142 Shield Plug Inner Gasket Replacement Checklist Cask Serial Number:
Initials Date 1.
Old gasket removed (Step 7.2.1) 2.
Gasket coating surfaces clean and free of foreign material and nicks.
g (Step 7.2.3) 3.
Replacement gasket acceptance 4.
Gasket Inventory No 5.
Installation completed (Step 7.2.4 thru 7.2.5) 6.
Gasket replaced and provided in accordance with maintenance Procedure Number WM-022.
Signature Date 7.
Visual inspection of painted alignment markers satisfactory?
Yes/No Alignment markers repainted?
Yes/No Signature Date 8.
Other Maintenance (describe):
9.
A.
Next scheduled gasket replacement due by:
Date B.
Leak Test of lid gaskets performed in accordance with WM-011.
Next leak test due by:
Date Signature Date
r-NO, REVISION PAGE WM-022 F
15 of 15 To:
Transportation Manager LN Technologies Corporation 1501 Key Road Columbia, SC 29201 From:
(Name)
(Title)
(Organization)
Description of maintenance:
CERTIFICATION (Organization), certifies thats (1)
It is a registered user of the LN,,142 cask, USNRC. C of C USA /9073/A in accordance with the terms and conditions of 10 CFR'71.12.
(2)
The described maintenance on the LN 142 was accomplished in accordance with LN procedure WM-022.
(3)
Maintenance per formed on this cask was accomplished in accordance with an NRC-approved 10 CFR 71, subpart H Quality Assurance Program, docket #
QA Inspector Signature /Date
OVERSIZE l DOCUMENT PAGE PULLED
- SEE APERTURE CARDS l
NUMBER OF OVERSIZE PAGES FILMED ON APERTURE CARDS t
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APERTURE CARD /HARD COPY AVAILABLE FROM RECORD SERVICES BRANCH,TIDC I
FT5 492-8989 I
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