ML20206M625
| ML20206M625 | |
| Person / Time | |
|---|---|
| Site: | 07109151 |
| Issue date: | 05/13/1986 |
| From: | NUCLEAR ENERGY SERVICES, INC. |
| To: | |
| Shared Package | |
| ML20206M607 | List: |
| References | |
| 83A1907, NUDOCS 8608210280 | |
| Download: ML20206M625 (9) | |
Text
8A 07 REV. O mir NUCLEAR ENERGY SERVICES DOCUMENT NO.
PAGE nF NES-1 CASK MAINTENANCE PROCEDURE Project Application Copy No Assigned To 6438 APPROVALS TITLE / DEPT. - SIGN ATURE - D ATE REV NO PREPARED BY Project Mgr.
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I FOT.M # NES 204 9/84
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DESCRIPTION APPROV AL "fg{-
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FORM *NES 2062 80
83A1907 DOCUMENT NO.
11 NUCLEAR ENERGY SERVICES TABLE OF CONTENTS Page 1.
INTRODUCTION 4
2.
REFERENCES 4
3.
CHECKLIST 4
4.
GASKET REPLACEMENT 4
4.1 Primary Lid 4
4.2 Secondary Lid 6
5.
RATCHET BINDER 6
6.
SECONDARY LID STUDS / NUTS 7
7.
REPAIR OF SECONDARY LID STUD HOLES 7
8.
DRAIN PLUG INSTALLATION 7
9.
PAINTING 7
10.
ALIGNMENT PINS 8
11.
ANNUAL LEAK TESTS 8
ATTACHMENT 1 NES -1 ROUTINE MAINTENANCE CHECKLIST 9
@ sNES 205 2CB.
DOCUMENT NO.
83A1907 11 NUCt. EAR ENERGY SERVICES
- 1. INTRODUCTION This procedure specifies methods to perform routine maintenance and repair on the NES-1 cask. Compliance with this procedure will ensure compliance of the NES-1 cask with its Certificate of Compliance. Non-routine maintenance (inspection or repair af ter an unusual event; 1.e., improper lif ting) shall be performed by a special procedure, and shall not be performed by this procedure.
- 2. REFERENCrd 2.1 NES Procedure 83A1908,"NES-1 Cask Handling and Operating Procedure."
2.2 NES Procedure 83A1902," Bubble Leak Test Procedure."
2.3 Certificate of Compliance, NRC #71-9151.
2.4 Title 10 Code of Federal Regulations, Part 71.
2.5 NES 81 A1050," Quality Assurance Program Plan for NES Transport Casks."
- 3. CHECKL5T A record of all routine maintenance shall be recorded on the "NES-1 Routine Maintenance Checklist," Attachment 1.
This checklist shall be maintained with the cask maintenance file.
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- 4. GASKET REPLACEMENT The primary and secondary lid gaskets shall be replaced every twelve (12) months or when inspection reveals defects. A defect is considered a nick, cut, or other condition which could impair its ability to seal the cask.
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4.1 PRIMARY LID GASKET REPLACEMENT l
I 4.1.1 Remove the old gasket. The gasket may be removed by hand or with a clean metal scraper (knife). Care should be used to prevent damage to the seating surface. Discard the old gasket using proper radiological controls.
I FORM eNES 205 2/80
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DOCUMENT NO.
Jur 1
W NUCLEAR ENERGY SERVCES M
i Using acetone as a solvent, clean the gasket surface. A wire brush or knife may be used to assist in cleaning the surface.
4.1.2 Inspect new gasket for nicks, cuts, and other damage that may make it unusable. The gasket is 3/8" thick neoprene, durometer 40, with an I.D. of 761/4" and an O.D. of 77 3/4".
4.1.3 Inspect the seating surface on the cask for a condition which may prevent proper seating (grit, grease, nicks, etc.) Fit the gasket to the cask body and cut to fit around the guide pin. The minimum acceptable width of the gasket at the guide pin is 1/2" after cutting. The gasket shall be spliced as shown below:
Apply Adhesive s
Approximately 45' l
SIDE VIEW OF TYPICAL GASKET SPLICE l
1 FORM sNES 205 2/80
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DOCUMENT NO.
O' NUCLEAR ENERGY SERVICES 4.1.4 Apply Carboline F-1 adhesive, or equivalent, to the seating surface on the cask body.
4.1.5 Install new gasket and apply adhesive to the gasket splice. Hold gasket in place until the adhesive cures.
4.2 SECONDARY LID GASKET REPLACEMENT 4.2.1
' Remove the old gasket. The gasket may be removed by hand or with a clean metal scraper (knife). Care should be used to prevent damage to the seating surface. Discard the old gasket using proper radiological controls.
Using acetone as a solvent, clean the gasket seating surface. A wire brush or knife may be used to assist in cleaning the surface.
4.2.2 Inspect the new gasket for nicks, cuts, and other damage that may impair its ability to seal the cask. The gasket is 3/8" thick, neoprene, durometer 50, with an O.D. of 22.75" and an I.D. of 20.25".
4.2.3 Inspect the seating surface on the cask for a condition which may prevent i
I proper seating (dirt, grease, nicks, etc.). Fit the gasket to the primary lid and cut or punch holes to fit around the studs and guide pins.
4.2.4 Apply Carboline F-1 adhesive, or equivalent, to the seating surface on the primary lid.
4.2.5 Install new gasket and hold in place until the adhesive cures.
- 5. RATCHET BINDERS Ratchet binders are inspected prior to each use for defects which may impair their l
ability to function. If inspection reveals a defective condition, replace the defective ratchet binder. The ratchet binders must be free of defects such as cracks and thread nicks. The ratchet binders must operate freely through the entire travel distance.
l The threads shall be coated with a high quality automotive lubricant.
1 FORM s NES 205 2/80
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DOCUMENT NO.
11 O'
NUCt. EAR ENERGY SERVICES
- 6. SECONDARY LID STUDS AND NUTS Secondary lid studs and nuts are inspected prior to each use for defects which may impair their ability to function. If inspection reveals a defective condition, replace the defective component. The studs and nuts must be free of defects such as cracks and thread nicks.
The threads shall be coated with a high quality automotive lubricant.
- 7. REPAIR OF SECONDARY LID STUD HOLES If the threaded portion of the secondary lid stud holes become damaged, they may be repaired by one of the following methods:
1.
Install Heli Coli inserts 2.
Drill and tap a deeper hole
- 8. DRAIN PLUG INSTALLATION The drain plug may be removed for cleaning and/or leak testing. A commercial pipe sealing compound shall be applied to the plug, and the plug shall be tightened to 20 ft.-
Ibs. torque. Prior to installation, the drain plug is inspected for defects which may impair its ability to function. If inspection reveals a defective condition, replace the drain plug.
- 9. PAINTING Chips, scratches and other surface damage may be repaired by repainting. The grade of paint shall be the same as, or equivalent to, the original paint used on the cask. The surface preparation and paint application shall be in accordance with the manufacturer's recommendations. If a gasket seating surface is repainted, the cask must be leak tested according to NES Procedure 83A1902.
i FORM 2 NES 205 2/80
83A1907 DOCUMENT NO.
m 11 U'
NUCLEAR ENERGY SERVCES
- 10. ALIGNMENT PINS AND STRIPES Alignment pins for both the primary and secondary lids may occasionally become damaged (bent). In the event this damage is discovered during cask service, the alignments pins may be removed and the cask operated without the alignment pins.
The cask alignment stripes shall be used to insure proper lid positions.
- 11. ANNUAL LEAK TEST The cask shall be leak tested annually according to NES Procedure 83A1902.
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t FORM 8NES 205 2/80
DOCUMENT NO.
83A1907 11 NUCLEAR ENERGY SERVICES 5
ATTACHMENT 1 NES-1 ROUTINE MAINTENANCE CHECKLIST Cask Identification:
l Date:
Maintenance Performed:
(only check applicable maintenance tasks)
Initial Date 1)
Primary Lid Gasket Replacement 2)
Secondary Lid Gasket Replacement 3)
Leak Test 4)
Ratchet Binder Replacement 5)
Secondary Lid Nuts / Studs 6)
Repainting l
l 7)
Other Maintenance (Describe):
I l
Attach certificates, purchase orders, leak test results, etc. to provide traceability of components and a record of inspections.
Signature Date FORM a NES 205 2/80
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