ML20206E206
| ML20206E206 | |
| Person / Time | |
|---|---|
| Site: | 07109145 |
| Issue date: | 05/29/1986 |
| From: | Mccoy S NUS CORP. |
| To: | |
| Shared Package | |
| ML20206E196 | List: |
| References | |
| WM-031, WM-31, NUDOCS 8606230207 | |
| Download: ML20206E206 (13) | |
Text
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REVislON PAGE WM-031 A
1 of 14 TITLE SS SERVICES MAINTENANCE AND INSPECTION PROCEDURE AHemmasonW FOR TYPE A, SERIES 50 CASKS
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- 1986 BY NUS' PROCESS SERVICES CORPORATION
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ALL RIGHTS RESERVED.
NO PART OF THIS DOCUMENT MAY BE REPRO-4 DUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL, INCLUDING PHOTOCOPYING, RECORDING OR BY ANY I
INFORMATION. STORAGE AND RETRIEVAL SYSTEM, WITHOUT PERMISSION JN WRITING FROM NUS PROCESS SERVICES CORPORATION, EXCEPT FOR.
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" STRICTLY CONTROLLED DISTRIBUTION, FOR. EVALUATION PURPOSES.
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- s TABLE OF CONTENTS Page 1.0 PURPOSE 3
2.0 APPLICABILITY 3
3.0 DEFINITIONS 3
4.0 REFERENCES
4 5.0 RESPONSIBILITIES 4
6.0 TOOLS AND MATERIALS 5
7.0 PERIODIC MAINTENANCE AND INSPECTION REQUIREMENTS 5
1 8.0 MAINTENANCE PROCEDURES 7
9.0 DISTRIBUTION OF MAINTENANCE RECORDS 10.
Inspection and Preuse Repairs 11 i.
Primary Lid Gasket Replacement 12 Checklist.
Secondary Lid Gasket Replacement 13 Checklist Table 1.
Tools and Materials 14 1
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3 of 14 1.0 PURPOSE This procedure identifies the inspection and maintenance requirements to be followed for all NUS Process Services Corporation (NUSPSC) Type A, Series 50 radioactive waste shipping casks.
This procedure ensures that all parts and materials used in maintaining the casks conform to the requirements of the applicable U.S.
Nuclear Regulatory Commission (NRC) Certificate of Compliance and that records documenting maintenance are properly maintained.
2.0 APPLICABILITY This procedure is applicable to routine inspection and maintenance for all NUSPSC Type A, Series 50 shipping casks (Certificate of Compliance USA /9145/A).
Items specifically covered under this procedure include:
-l 2.1 Primary lid gasket replacement 2.2 Secondary lid gasket replacement 2.3 Ratchet binder replacement 2.4 Secondary lid stud / nut replacement 2.5 Leak testing of cask seals 3.0 DEFINITIONS 3.1 NUSPSC - NUS Process Services Corporation 3.2 U.S.
NRC - United States Nuclear Regulatory Commission 3.3 C of C - Certificate of Compliance issued by.the U.S.
NRC 3.4 Primary lid gasket - Seal placed between the top of the cask body and the underside of primary lid perimeter.
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3.5 Secondary lid gasket - Seal placed between the top of the working opening of the primary lid and the underside of secondary lid.
3.6 Ratchet Binder - Mechanical turnbuckle used in securing the primary lid to the cask body.
4.0 REFERENCES
4.1 NUS Process Services Corporation Documents 4.1.1 NUSPSC Quality Assurance Manual 4.1.2 QA-001 "Procqdure Preparation and Control" 4.1.3 QA-Oll
" Procedure for Storage and Retrieval of Quality Assurance Records" 4.1.4 WM-Oll
" Soap Bubble Leak Test NUS Process Services Type A Shipping Casks" 4.1.5 WM-030
" Operating Procedure for Type A Series 50 Casks" y
4.1.6 NUS Drawing No. 5025-M-2010, "NUS Type A Transportation Casks - Series 50 Cask General Arrangements" r
g-4.2 USNRC Documents l
4.2.1 U.S. NRC Certificate of Compliance USA /9145/A 4.2.2 U.S. NRC Approval No. 0496 5.0 RESPONSIBILITIES The Manager, Transportation Services is designated as the.
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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.
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5 of 14 6.0 TOOLS AND MATERIALS 6.1 Table 1 provides a complete list of all items necessary to perform routine maintenance on NUSPSC Type A, Series 50 shipping casks.
All materials specified for a particular maintenance action should be available prior to starting the work.
6.2 Materials required for leak testing gaskets are specifically identified in NUSPSC Procedure No.
WM-Oll, Reference 4.1.4.
7.0 PERIODIC MAINTENANCE AND INSPECTION REQUIREMENTS 7.1 Inspections Prior to Use Each Type A cask shall be inspected to verify the integrity of the package and the adequacy of the tiedown mechanisms prior to over-the-road movement of the cask.
A complete list of items to be inspected is provided in Table 1.
Inspection of the lid gaskets should be limited to inspections of the lid (s) actually used during cask operation.
For example, if the secondary lid was removed to fill a preloaded disposable liner in the cask, the primary lid gasket need not be inspected unless site specific procedures require such inspection.
7.1.1 Inspect the primary lid gasket and seating surface prior to placement on the cask.
Gasket must be free of defects such as nicks, frays and cuts.
7.1.2 Inspect the secondary lid gasket and seating surface prior to placement in the primary lid.
The gasket must be free of defects such as nicks, frays and cuts.
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6 of 14 7.1.3 Inspect the secondary lid studs for wear
..f caused by cross treading and over torquing.
7.1.4 Inspect the secondary lid nuts for wear caused by cross treading and over torquing.
7.1.5 Inspect the lid lockdown ratchet binders prior to each shipment.
Check for freedom of I
movement and locking action.
7.1.6 Check ratchet binder handle storage straps for i
dry-rot or breaks.
7.1.7 Inspect primary lid guide marks for fading or i
j flaking paint..
7.1.8 Inspect secondary lid alignment pins for wear, cracks and breaks.
Pins should engage the secondary lid when installed in the primary lid.
7.1.9 Inpsect primary lid alignment pins for wear, cracks and breaks.
Pins should engage the primary lid.
7.1.10 Inspect cask to trailer tiedown cable assemblies prior to each shipment.
Inspect tiedown cables for broken or frayed wire, ratchet binders for security and trailer anchor points for cracks and other obvious defects.
7.2 Periodic Maintenance 7.2.1 Replace the primary lid gasket at a minimum of every twelve months.
7.2.2 Replace the secondary ' lid gasket at a minimum of every twelve months.
Conduct the soap bubble leak test per Reference 4.1.4.
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7 of 14 8.0 MAINTENANCE PROCEDURES 8.1 Primary Lid Gasket Replacement 8.1.1 Remove the old flat gasket by hand or use metal scraper, using care to prevent damage to seating surfaces.
Discard old gasket material using proper radiological procedures.
8.1.2 Clean the entire gasket seating surfaces (both cask body and lid) by using a steel wire brush along with acetone as a cleaning solvent and lubricant.
8.1.3 Inspect all seating surfaces for foreign material or nicks which would prevent proper seatng and sealing.
8.1.4 Inspect the new replacement gasket for nicks, frays and cuts.
Discard unusable materials.
8.1.5 Fit gasket to cask body surface.
8.1.6 Place gasket adhesive on cask body in accord-ance 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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.v 45* (approxima tely)
Cask Body Exterior 7
Casket Seating Area Primary Lid Casket p
Top V iew CASKET JOINF DETAIL' he _-
Adhekive d
_' Casket Seating Area (Side View)
Figure 1 8.1.9 Complete Attachment 2 and distribute in accordance with Section 9.0.
8.2 Secondary Lid Gasket Replacement 8.2.1 Remove the old flat gasket by hand or use metal scraper.
Use care to prevent damage to seating surfaces.
8.2.2 Clean entire gasket seating surfaces (both priary lid and secondary lid) by using a steel wire brush along with acetone as a cleaning 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 Attachment 3 and distribute in accordance with Section 9.0.
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i 8.3 Secondary Lid Hold-Down Stud Replacement
.- s Secondary lid studs may be replaced and/or repaired in the following manner:
8.3.1 Heli-coil insert 8.3.2 Increase depth of tap, drill and retap 1/4" using 3/4" 10UNC-2A stud of appropriate length.
Material as specified in NUS Drawing No. 5025-M-2010, Sheet 1 of 1, Item 19 (Reference 4.1.6).
8.4 Ratchet Binder Repair or Replacement 8.4.1 If the ratchet binder binds before the primary lid is tightly secure, then perform the following:
8.4.1.1 Extend ratchet binder far enough to remove ball lock pin and threadless bolt.
8.4.1.2 Lean ratchet binder outward away from cask and extend out to full length.
Be careful not to spin lug ends totally out of binder.
8.4.1.3 Clean old lubricant and contaminates from threads using a steel brush.
8.4.1.4 Install new all purpose lubricant on threads and rotate binder ends all the way into the binder.
8.4.1.5 Extend binder ends back out to the length necessary to reinstall the threadless bolt and ball lock pin.
8.4.1.6 Retighten down primary lid using ratchet binder.
8.4.2 If the above steps did not repair ratchet binder, then perform the following:
8.4.2.1 Loosen binder enough to remove the ball lock pin and threadless bolt.
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10 of 14 8.4.2.2 Remove the cotter pin, nut and bolt
..f on lower end of binder.
8.4.2.3 Remove the ratchet binder and ship to NUSPSC, Columbia, South Carolina for aditional maintenance.
8.4.2.4 Install new ratchet binder on cask by installing bolt through lower end of binder.
8.4.2.5 Reinstall nut on bolt and secure using a newcotter pin.
8.4.2.6 Reconnect upper end of ratchet and tighten down in accordance with Reference 4.1.5.
9.0 DISTRIBUTION OF MAINTENANCE RECORDS 9.1
- end original copy of Attachments 1, 2, and 3 to NUSPSC, Columbia, South Carolina office, c/o Transportation 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 only.
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Inspection and Preuse Repairs Cask Model.:
Serial No.:
Paragraph Description SAT P.epair Procedure Initials 7.1.1 Primary Lid YES/NO 8.1 Gasket / Seating Surfaces 7.1.2 Secondary Lid YES/NO 8.2 Gasket / Seating Surfaces 7.1.3 Seconday Lid YES/Nd 8.3 Studs 7.1.4 Secondary Lid YES/NO Replace Nuts 7.1.5 Ratchet Binders YES/NO 8.4 7.1.6 Ratchet Binder YES/NO Replace Handle Storage Straps 7.1.7 Primary Lid YES/NO Repaint Alignment Marks 7.1.8 Secondary Lid YES/NO Replace 1
Alignment Pins 7.1.9 Primary Lid YES/NO Replace Alignment Pins 7.1.10 Cask Tiedown YES/NO Repair / Replace Inspect / Repair Completed On:
by Date Technician
- Check if Maintenance is Performed
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REVISION WM-031 A
12 of 14 Primary Lid Gasket Replacement Checklist Cask Model No.:
Serial No.:
Initials Date 1.
Old gasket removed 2.
Gasket seating surfaces clean and free of foreign material and nicks (Step 8.1.3) 3.
Replacement gasket acceptance (Step 8.1.4) 4.
Gasket Inventory No.:
5.
Installation completed (Step 8.1.5 through 8.1.8) 6.
Visual inspection of painted alignment guide plates satisfactory?
Alignment marks repainted?
YES / NO 7.
Other maintenance (describe):
8.
a.
Next schedule gasket replacement due by:
Date b.
Leak test of gasket performed in accordance with WM-Oll; Reference 4.1.4 :
Date Signature Date
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13 of 14.
Secondary Lid Gasket Replacement Checklist Cask Model No.:
Serial No.:
Initials Date 1.
Old gasket removed (Step 8.2.1) 2.
Gasket seating surfaces clean and free of foreign material and nicks (Step 8.2.3) 3.
Replacement gasket acceptance 4.
Gasket Inventory No.:
5 Installation completed (Step 8.2.4) 6.
Visual inspection of painted alignment guide plates satisfactory?
YES / NO Alignment marks repainted?
YES / NO 7.
Other maintenance (describe):
8.
a.
Next schedule gasket replacement due on:
Date b.
Leak test of ;asket performed in accord-I ance with WM-Oll; Reference 4.1.4:
Date 1
Signature Date L
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Table 1.
Tools and Materials Primary Secondary Ratchet Gasket Lid Gasket Binder Stud / Nut i
i Replacment Replacement Replacement Replacement 1.
Primary Lid Gasket x
2.
Secondary Lid Gasket x
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3.
Gasket Scrapper or Clean x
x W
Metal Scrapper Knife 4.
Steel Wire Brush - Manual x
x x
or Electric 5.
Acetone (1 quart)
X X
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Gasket Adhesive (RTV Silicone x
x Adhesive or Equivalent) 7.
Ratchet Binder (s) x 8.
Secondary Lid Stud (s) x g
9.
Secondary Lid Nut (s) x e-o l
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- 10. All Purpose Lubricant x
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