ML20214W498
| ML20214W498 | |
| Person / Time | |
|---|---|
| Site: | 07109151 |
| Issue date: | 11/24/1986 |
| From: | Bush F LN TECHNOLOGIES CORP. (FORMERLY LONDON NUCLEAR SVCS |
| To: | |
| Shared Package | |
| ML19292G392 | List: |
| References | |
| 28150, WM-012, WM-12, NUDOCS 8612100253 | |
| Download: ML20214W498 (13) | |
Text
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1 of 13 TITLE LN 14-170 SERIES I' CASK MAINTENANCE g
.C O APO A ATION I
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I COPYRIGHT C 1986 BY LN TECHNOLOGIES CORPORATION ALL RIGHTS RESERVED.
NO PART OF THIS DOCUMENT MAY BE REPRO-DUCED OR TRANSMITTED IN ANY. FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL, INCLUDING PHOTOCOPYING, RECORDING OR BY ANY INFORMATION STORAGE AND RETRIEVAL SYSTEM, WITH.0UT PERMISSION IN WRITING FROM LN TECHNOLOGIES CORPORATION, EXCEPT FOR STRICTLY CONTROLLED DISTRIBUTION, FOR EVALUATION PURPOSES.
8612100253 861120 PDR ADOCK 07109151 C
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'OklGIN'ATOR DATE CHECKED
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DATE '/ MANAGER DATE
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2 of 13 TABLE OF CONTENTS Page 1.0 PURPOSE 3
2.0 APPLICABILITY 3
2.1 Primary Lid Gasket 3
2.2 Secondary Lid Gasket 3
2.3 Ratchet Binder 4
2.4 Secondary Lid Studs / Nuts 4
3.0 DEFINITIONS 4
4.0 REFERENCES
5 5.0 RESPONSIBILITIES 6
q 6.0 TOOLS AND MATERIALS 6
7.0 GASKET / SEAL REPLACEMENT 7
7.1 Primary Lid Gashet Replacement 7
7.2 Secondary Lid Gasket Replacement 8
7.3 Secondary Lid Holddown Stud Replacement 9
7.4 Leak Testing 9
8.0 DISTRIBUTION OF MAINTENANCE RECORDS 10 Attachment I 11 12 13 O
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3 of 13 1.0
, PURPOSE This procedure describes the correct methods of gasket and-ratchet binder replacement on the LN 14-170 Series 1 shipping cask.
The LN 14-170 Series 1 shipping casks include units with 29 inch or 16 inch secor.dary lids. This procedure is performed to ensure that all parts and materials used are in compliance with the applicable Nuclear Regulatory Commission issued Certificate of Compliance and that proper records are maintained when gasket or binder replacement is required.
2.0 APPLICABILITY This procedure is applicable to all gasket and ratchet binder replacement operations performed on the LN 14-170 Series i shipping cask.
2.1 Primary Lid Gasket 2.1.1 Replace gasket every twelve (12) months.
2.1.2 Inspect primary lid gasket primary lid painted alignment markers prior to placement of the primary lid on the cask.
Gasket must be free of defects such as nicks, frays, and cuts and the painted alignment markers must be clear and not severely chipped or faded.
Replace the gasket or repaint the alignment markers to correct the defects.
2.2 Secondary Lid Gasket 2.2.1 Replace gasket every twelve (12) months.
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2.2.2 Inspect secondary lid gasket _and secondary lid painted alignment markers to O
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4 of 13 placement of the secondary lid on the primary lid.
Gasket must be free of defects and the painted alignment markers must be clear and not severly chipped or faded.
Replace the gasket or repaint the alignment markers to correct the defects.
2.3 Ratchet Binder 2.3.1 Replace ratchet binders as necesssary to ensure positive closure of the primary lid to cask body.
2.3.2 Ratchet binders must be inspected prior to securing primary lid to cask body.
Ratchets must operate freely through the complete designed travel distance.
All working parts must be free l
I of defects such as cracks.
If inspection reveals defects, replace ratchet binders.
2.4 Secondary Lid Studs / Nuts 2.4.1 Replace secondary lid studs and/or nuts as necessary to ensure positive closure of the shield plug to the primary lid.
2.4.2 Secondary lid studs and nuts must be inspected prior to securing shielded plug to the primary lid.
Studs and nuts must be free of defects such as thread nicks and cracks.
If inspection reveals defects, replace.
3.0 DEFINITIONS
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3.1 Primary lid gasket - 76.2" I.D.
X 79.2" O.D.
X 0.38" Thick Solid Neoprene Durometer 40
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5 of 13 3.2 Secondary Lid gasket 3.2.1 15 inch Secondary Lid - 18.5" I.D.
X 22.5" O.D.
X 0.38" thick Neoprene Durometer 50 3.2.2 29 inch Secondary Lid - 31.5" I.D. X 35.5" O.D.
X 0.38" thick solid Neoprene Durometer 50 3.3 Ratchet Binder - 1 3/4" X 8" Galvanized Type J 3.4 Secondary Lid Stud - Driver Type Stud 3/4" - 10UNC-2A ASTM A-193 Gr B-7 3.5 Secondary Lid Nut - Hex head 3/4" - 10UNC-2B ASTM A-194 Gr B-7 l
l 3.6 Shield plug and Secondary lid are synonymous and may be used in documents and references interchangeably.
4.0 REFERENCES
4.1 LN " Procedure and Instruction Preparation and Control" Procedure No. QA-001.
4.2 LN " Operating Instructions for Loading and Unloading the LN-14-170 Series 1 shipping Cask" Procedure No. WM-014.
4.3 U.S.
Nuclear Regulatory Commission Certificate of Compliance No. 9151.
4.4 U.S.N.R.C.
Safety Evaluation Report on Model No.
LN-14-170 Series i shipping cask Docket No. 71-9151.
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4.5 LN " Inventory Control" Procedure No. AD-00,2.
4.6 LN " Procurement Control" Procedure No. AD-001.
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6 of 13 5.0 RESPONSIBILITIES 5.1 Tne Manager, Transportation Services is designated as the project manager for all cask maintenance operations.
He is specifically tasked with ensuring that all inspections and maintenance is performed in a timely manner, that all maintenance records are properly maintained and that maintenance information is distributed to registered cask users in a timely manner.
5.2 Quality Assurance Representative of the Registered User's Organization shall ensure that any cask maint'enance performed at the registered user's site (by other than LN personnel) is accomplished in accordance with that registered user's NRC approved 10CFR71 subpart H Ouality Assurance Program.
shall be completed by a Quality Assurancce representative when such maintenance is performed.
6.0 TOOLS AND MATERIALS 6.1 Gaskets 6.1.1 Primary Lid Gasket 6.1.2 Secondary Lid Gasket 6.2 Ratchet Binders 6.3 Secondary Lid Studs l
l 6.4 Secondary Lid Nuts l
I 6.5 Gasket Scraper or clean metal scraper knife 5
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7 of 13 6.6 Steel wire brush - drill type or handheld 6.7 Acetone 6.8 Gasket adhesive (Permatexe Super Glue adhesive, Mastere Super Weatherstrip adhesive, or other brand adhesives which are recommended by the manufacturer for bonding rubber to metal) 7.0 GASKET / SEAL REPLACEMENT 7.1 Primary Lid Gasket Replacement 7.1.1 Remove old flat gasket by hand or use metal scraper, using care to prevent damage to seating l
l surfaces.
Discard old gasket material using proper radiological procedures.
7.1.2 clean entire gasket seating surfaces (both cask body and lid) by using a steel wire brush along with acetone as cleaning solvent and lubricant.
7.1.3 Inspect all seating surfaces for foreign material or nicks which would prevent proper seating and sealing.
7.1.4 Inspect new replacement gasket for nicks, frays and cuts.
Discard unusable materials.
7.1.5 Fit gasket to cask body surface and cut to fit around guide pin.
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7.1.6 Place gasket adhesive on cask body.
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WM-012 H
8 of 13 7.1.7 Hold gasket in place until i itial adhesive sets.
7.1.8 Make butt joints using adhesive between the two gasket surfaces.
Compress to fit.
See Figure 1 for an example of how such a butt joint can be made.
Other joint angles are acceptable as long as the joint is flush and free of gaps; however, a square 90* butt joint is not acceptable.
Figure 1 Gasket Adhesive b
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45' Approximately Gasket Joint Detail (Side View) 7.1.9 Complete Attachments 1 and 3 (if applicable) and distribute in accordance with section 8.
7.2 Secondary Lid Gasket Replacement 7.2.1 Remove old flat gasket by hand or use metal scrapper, using care to prevent damage to seating surfaces.
7.2.2 Clean entire gasket seating surfaces (both primary lid and secondary lid) by using a steel i
wire brush along with acetone as a cleaning solvent and lubricant.
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9 of 13 7.2.3 Inspect all seating surfaces for foreign material or nicks which would prevent proper sealing.
7.2.4 Place gasket in shield plug and mark bolt holes.
7.2.5 Punch 7/8" holes in gasket at marked spots.
7.2.6 Place adhesive on primary cask lid and hold gasket in place until adhesive is set.
7.2.7 Complete attachment 2 and 3 (if applicable) and distribute in accordance with section 8.
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7.3 Secondary Lid Hold Down Stud Replacement Secondary lid studs may be replaced and/or repaired in the following manner:
7.3.1 Heli coil insert, if required.
7.3.2 Increase depth of tap, drill and retap 3/4" -
10UNC using 3/4" - 10UNC-2A stud of appropriate length.
Material as specified in LN Drawing No. 8916-M-2003, Item 7.
7.3.3 Complete attachment 3 (if applicable) and distribute in accordance with section 8.
7.4 Leak Testing 7.4.1 Prior to acceptance of a LN-14-170 Series i shipping cask fr'om the fabricator, a properly
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10 of 13 7.4.2 After gasket replacement, conduct a leak test in accordance with Procedure WM-011. This test.'
shall be to test gasket and gasket seating surface integrity only.
8.0 DISTRIBUTION OF MAINTENANCE RECORDS 8.1 Send original copy of Attachments 1, 2,
and 3 to LN, Columbia, S.
C.
office, c/o Transportation Manager.
8.2 Retain one copy for Registered User's Cask Manual.
8.3 Additional copies, as may be required, are authorized for Registered User's use.
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11 of 13 9
LN 14-170 Series 1 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) 3.
Replacement gasket acceptance (Step 7.1.4) 4.
G'asket In~ventory No:
5.
Installation completed (Step 7.1.5 thru 7.1.8) 6.
Gasket replaced and provided in accordance with maintenance Procedure Number WM-012.
Signature Date 7.
Visual inspection of painted alignment markers satisfactory?
Yes/No Alignment markers repainted?
Yes/No Signature Date 8.
Other Maintenance (describe):
a Signature Date l
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12 of 13 LN 14-170 Series 1 Secondary Lid 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.
(Step 7.2.3) 3.
Replacement gasket acceptance 4.
Gasket Inventory No:
5.
Installation completed (Step 7.2.4 thru 7.2.6) 6.
Gasket replaced and provided in accordance with maintenance
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Procedure Number WM-012.
Signature Date 7.
Visual inspection of painted alignment markers satisfactory?
Yes/No Alignment markers repainted?
Yes/No Signattire Date 8.
Other Maintenance (describe):
Signature Date l
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13 of 13 To:
Transportation Manager LN Technologies Corporation 1501 Key Road Columbia, SC 29201 From:
(Name)
(Title)
(Organization)
Description of Maint.enance:
CERTIFICATION (Organization), certifies that:
(1)
It is a registered user of the LN 14-170 cask, USNRC C of C USA /9151/A in accordance with the terms and conditions of 10 CFR 71.12.
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(2)
The described maintenance on the LN 14-170 was accomplished in accordance with LN procedure WM-012.
(3)
Maintenance performed on this cask was accomplished in accordance with an NRC-approved 10 CFR 71, subpart H, Quality Assurance Program, Docket #
QA Inspector Signature /Date k
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