ML20215L271
| ML20215L271 | |
| Person / Time | |
|---|---|
| Site: | 07109151 |
| Issue date: | 01/08/1985 |
| From: | Daneshcar F, Tina Ghosh NUS CORP. |
| To: | |
| Shared Package | |
| ML20215L218 | List: |
| References | |
| 28150, NUDOCS 8705120168 | |
| Download: ML20215L271 (11) | |
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NO.
REVISION PAGE '
WM-Oll G
1 of 7 TITLE SOAP BUBBLE LEAK TEST LN TECHNOLOGIES CORPORATION TECHNOLOGIES TYPE A SHIPPING CASKS
.C O RPO A ATION b bidf b bb.
li COPYRIGliT C 1986 BY LN TECliNOLOGIES CORPORATION ALL RIGilTS RESERVED.
NO PART OF TilIS DOCUMENT MAY BE REPRO-DUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECilANICAL, INCLUDING P110TOCOPYING, RECORDING OR BY ANY INFORMATION STORAGE AND RETRIEVAL SYSTEM, WIT 110VT PERMISSION IN WRITING FROM LN TEC11NOLOGIES CORPORATION, EXCEPT FOR STRICTLY CONTD01.'"O DISTRIBUTION, FOR EVALUATION PURPOSES.
(al.h b--
(
o ls sW/ hew i/41 Y]f/)Apyh/ //kth U/:pi o/ 'IN*fuf/k/reh$ YFhs t
G ORIGINATOR DATE' CHECKED
'OA'TE
~
F DATE' 7 MANAGER j DATE 0A DFAS~d
NO.
REVISION PAGE WM-Oll G
2 of 7 TABLE OF CONTENTS Page 3
1.0 PURPOSE 3.0 APPLICABILITY 3
3.0 DEFINITIONS 3
4.0 REFERENCES
3 5.0 RESPONSIBILITIES 4
O 6.0 EQUIPMENT 4
4 7.0 PROCEDURE 0.0 ACCEPTANCE CRITERIA 5
6 9.0 RECORDS I
Test Performance Form 7
Figure 1 O
NO.
REVISION PAGE WM-011 G
3 of 7 1.0 PURPOSE This procedure states the requirements for performing a Low Pressure Soap Bubble Leak Test for LN Type A shipping casks.
The fabrication contractor shall submit for approval detailed leak test procedures.
The purpose of this test will be to check the integrity of. welds, threaded fittings, flanges and any other joints where pressure tests below 8 6
psi are adequate to meet contractural/ functional requirements.
2.0 APPLICABILITY This test shall be performed before painting on all LN Technologies Type A shipping casks prior '
acceptance from a fabricator.
Additionally, the test shall be performed yearly as a verification of gasket and gasket seating surfaces integrity.
This soap bubble leak test is sensitive for leak testing where a sensitivity of no greater than 10-3 atm.cm3 see is required.
/
3.0 DEFINITIONS None.
4.0 REFERENCES
4.1 ANSI N14.5, 1977 - American National Standards for leakage tests on packages for shipment of radioactive materials.
4.2 Code of Federal Regulation (CFR) Title 10 Part 71 9
9
NO.
REVISION PAGE WM-011 G
4 of 7 5.0 RESPONSIBILITIES Quality Assurance Manager or his designee -
shall, witness the performance of the applicable leak test and sign the test performance form (Figure 1).
6.0 EQUIPMENT s
The following equipment is required for a Low Pressure Soap j
Bubble Test.
6.1 Air Supply - A standard shop compressor or bottle compressed air capable of pressurizing the tested cavi-ty to 8 to 10 psig shall be utilized.
I 6.2 Gauge - A properly calibrated gauge capable of indicat-ing 0 - 15 psi range with an accuracy of + 2% of the indicated reading shall be utilized.
6.3 Bubble Test Solution - A leak indicating solution equi-valent to the following shall be utilized:
Dasco-Kleen Leak-Finding Compound #3183 D.
A.
Stewart Oil Company 2727 S. Gray Street Chicago, Illinois 60623s 6.4 Relief valve - A relief valve set and checked at 10 percent over maximum pressurization pressure.
7.0 PROCEDURE l
7.1 The test shall be conducted by LN Q.A.
approved personnel.
N O.
REVISION PAGE WM-Oll G
5 of 7 7.2 The item shall be leak tested with all lids, gaskets, plugs, valves, and fasteners in place and in the normai closed position.
The only exception shall be the port or valve utilized to pressure the cavity.
CAUTION:
IF THE CASK LEAK TEST IS TO BE CONDUCTED WITH A LINER INSIDE THE CASK, LINER SHALL.BE VENTED DURING THE TEST TO PREVENT LINER IMPLOSION.
s 7.3 Pressurize the cavity to 8 psi + 1,
-0 psi.
7.4 Close off or maintain pressure at pressurization location to hold specified pressure in cavity.
7.5 Apply the leak detecting solution to all gasketed 9
areas, threads, seal welds, ports or valves by brush or spray.
Inspect for bubbles.
7.6 Conduct leak test for 5 minutes.
8.0 ACCEPTANCE CRITERIA 8.1 No bubbles shall be visable to the unaided eye during the 5 minute test.
8.2 If bubbles appear during the best, weld integrity, gas-ket condition, flange or lid tightness, valve position, plug security, etc., shall be checked and the test rerun.
8.3 The results of the leak test shall be recorded on the G
Test Performance form (Figure 1).
8.3.1 Leak Test Pressure
NO.
REvtSION PAGE WM-Oll G
6 of 7 8.3.2 Gauge Model, P/N and S/N, as applicable 8.3.3 Leak Test Duration 8.3.4 Date 8.3.5 Results, including discrepancies and acceptance 9.0 RECORDS Test Performance forms shall be maintained by the Quality Assurance Manager for one (1) year after completed usable g
life of tested item.
e D
NO.
REVISION PAGE WM-011 G
7 of 7 Figure 1 TEST PERFORMANCE Equipment Tested:
Date Tested:
Leak Test Pressure:
psi s
Gauge Information:
Model #
Range Calibration Date Leak Test Duration:
minutes I
I PASSED FAILED Discrepancies:
Next Leak Test Due (f_ 12 months):
Date Signatures:
Date Test Performer l
l l
l l
Date Quality Assurance A
r 7/-7/5/
or/$/f' "
?
- b UM-012 g
1 f 13 LN 14-170 SERIES I CASK MAINTENANCE TECHNot OG8ES
.C O APO A ATION t
l l
COPYRIGHT C 1986 BY LN TECHNOLOGIES CORPORATION ALL RIGHTS RESERVED.
NO PART OF THIS DOCUMENT MAY BE REPRO-DUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL, INCLUDING PHOTOCOPYING, RECORDING OR BY ANY INFORMATION STORAGE AND RETRIEVAL SYSTEM, WITHOUT PERMISSION IN WRITING FROM LN TECHNOLOGIES CORPORATION, EXCEPT FOR S TR I CTLY-CONTRO L LED-D I S TRFBJ IT I ON, FOR EVALUATION PURPOSES.
O" ' Q 6K 9 6 3 0
ll!iC0! Ell 0MD COPY
- g i
i i
W^ll bAw1Jad$sk Ubk; 4/s/{ m
'l4eQ [,g/Q iQ 4
NATOR DATE CHECKED
'DATE OA' DATE 7 MANAGER DATE 0
J
r
]
N O.
REVISION PAGE WM-012 H
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
s 3.0 DEFINITIONS 4
4.0 REFERENCES
5 5.0 RESPONSIBILITIES 6
6.0 TOOLS AND MATERIALS 6
7.0 GASKET / SEAL REPLACEMENT 7
7.1 Primary Lid Gasket 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 L3 l
L O
NO.
REVISION PAGE WM-012 H
3 of 13 1.0 PURPOSE This procedure describes the correct methods of gasket and ratchet binder replacement on the LN 14-170 Series i shipping cask.
The LN 14-170 Series i shipping casks include units with 29 inch or 16 inch secondary 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 1 shipping cask.
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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
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lid painted alignment markers to e
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REVISION PAGE WM-012 H
4 of 13 i
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 s
2.3.1 Replace ratchet binders as necesssary to ensure
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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 G
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.
l 3.0 DEFINITIONS l
I 3.1 Primary lid gasket - 76.2" I.D.
X 79.2" O.D. X 0.38" Thick Solid Neoprene Durometer 40 O
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REVISION PAGE WM-012 H
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
I 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 1 shipping cask Docket No. 71-9151.
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4.5 LN " Inventory Control" Procedure No. AD-002.
4.6 LN " Procurement Control" Procedure No. AD-001.
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REVISION PAGE WM-012 H
6 of 13 5.0 RESPONSIBILITIES 5.1 The 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 maintunance records are properly maintained and that' maintenance information is distributed to registered cask users in a timely 6
manner.
5.2 Quality Assurance Representative of the Registered User's Organization shall ensure that any cask maintenance performed at the registered user's site (by other than LN personnel) is accomplished in accordance with that registered user's NRC appro'ved 10CFR71 l
I subpart H Quality 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 6.4 Secondary Lid Nuts l
I 6.5 Gasket Scraper or clean metal scraper knife
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REVISION PAGE WM-012 H
7 of 13 6.6 Steel wire brush - drill type or handheld 6.7 Acetone 6.8 Gasket adhesive (Permatex8 Super Glue adhesive, Master 8 Super Weatherstrip adhesive, or other brand adhesives which are recommended by the. manufacturer for bonding rubber to metal) s 7.0 GASKET / SEAL REPLACEMENT 7.1 Primary Lid Gasket Replacement 7.1.1 kt..iove old flat gasket by hand or use metal scraper, using care to prevent damage to seating
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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.
l 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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REVISION PAGE WM-012 11 8 of 13 7.1.7 Hold gasket in place until initial 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 flur.h 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 tg prevent damage to seating surfaces.
7.2.2 Clean entire gasket seating surfaces (both primary lid and secondary lid) by using a steel wire brush along with acetone as a cleaning solvent and lubricant.
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REVISION PAGE WM-012 H
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.
r 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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l 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" - 100NC-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 1 shipping cask from the fabricator, a properly l
l witnessed pressure test shall be performed and reviewed in accordance with LN Procedure WM-Oll Leak Test.
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REVISION PAGE WM-012 H
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.
g 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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REvtSION PAGE WM-012 H
11 of 13 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)
G'sket Inventory No:
4.
a 5.
Installation completed (Step 7.1.5 thru 7.1.8) 6.
Gasket replaced and provided in accordance with maintenance Procedure Number WM-OL2.
Signature Date 7.
Visual inspection of painted alignment markers satisfactory?
Yes/No Alignment markers repainted?
Yes/No Signature Date 8.
Other Maintenance (describe):
s Signature Date
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REVISION PAGE WM-012 H
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 G
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):
Signature Date I.
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REvtSION I PAGE
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WM-012 H
13 of 13 To:
Transportation Manager LN Technologies Corporation 1501 Key Road Columbia, SC 29201 From:
(Name)
(Title)
(Organization)
Dpscription of Maintenance:
CERTIFICATION (Organization), certifies that:
(l)
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.
(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 O
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//r dQ OYd228Y NO.
REVISION P'AG E WM-013 F
1 of 7 i
GAMMA SCANNING OF LEAD SHIELDING FOR LN TYPE CASKS TECHNot.O GIES
.C O APO A ATION ICONTRDED COPY 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, WITHOUT PERMISSION IN WRITING FROM LN TECHNOLOGIES CORPORATION, EXCEPT FOR STRICTLY CONTR0_LLED nTyTDTRUTION, FOR EVALUATION PURPOSES.
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df?lGINATOR DATE CHECKED
'OATE #
0A 6' DATE' 7 MANAGER DATE NKO
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REVISION PAGE WM-013 F
2 of 7 TABLE OF CONTENTS Page 1.0 PURPOSE 3
2.0 APPLICABILITY 3
s 3.0 DEFINITIONS 3
s 4.0 REFEREQCES AND APPLICABLE DOCUMENTS 3
5.0 PROCUltEMENT PROJECT MANAGER 3
6.0 PERSONNEL QUALIFICATIONS 3
7.0 EQUIPi4ENT 4
8.0 CALIBRATION 4
i 9.0 PROCEDURE 4
10.0 ACCEPTANCE CRITERIA 5
11.0 DISTRIBUTION 6
Figure 1 7
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REVISION PAGE WM-013 F
3 of 7 1.0 PURPOSE I
This generic test specification procedure states the minimum requirements for gamma scanning of lead shielding for LN Type casks.
The fabricator shall submit for approval detailed gamma scanning procedures.
2.0 APPLICABILITY s
This generic procedure is applicable to all radioactive shipment casks or radiation shields fabricated for and procured by LN Technologies.
3.0 DEFINITIONS
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4.0 REFERENCES
AND APPLICABLE DOCUMENTS 4.1 AECU 2967, November 1954 4.2 ASNT Recommended Practice No. SNT-TC-1A, 1980 Edition 5.0 RESPONSIBILITIES Procurement Project Manager - shall inspect and approve all vendor submitted gamma scanning procedures against this test specification procedure.
6.0 PERSONNEL QUALIFICATIONS Personnel conducting gamma scanning shpil be familiar with l
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the detailed procedures and shall be certified Level II or Level III radiographers in accordance with SNT-TC-1A.
(Reference 4.2) l
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REVISION PAGE WM-013 F
4 of 7 7.0 EQUIPMENT The gamma detector shall be a model E120 Eberline or equiva-lent with a pancake probe.
The gamma source shall be either IR 192 or Co60 of sufficient activity in curies to obtain reasonable readings.
The source strength will be dependent on the lead and steel thickness being scanned.
8.0 CALIBRATION s
A calibration plate will be prepared using defect free lead equal to the nominal lead thickness for the specific cask.
Steel equal to the nominal specified wall thickness will be placed on either side of the lead.
The lead shall be design-ed so that several 1/8" sections of lead can be removed or added to the calibration plate.
The calibration plate will be installed in a fixture in place of the secondary cover as shown in Figure 1.
The source is placed inside the cask at a distance from the plate equal to the inside radius of the cask.
The radiation detector is placed on top of the plate and radiation readings are taken with the meter set on the lowest scale.
The test is then re-peated modifying the lead thickness in increments of 0.125 inches plus and minus the nominal lead thickness.
At least five points will be measured and a plot of lead thickness vs detector readout is then plotted.
The maximum acceptable reading during the gamma scan shall~be 1.1 times the reading obtained from the nominal lead wall thickness or the extrapo-lated reading for.90 percent of the nominal lead wall thick-l ness, whichever is less.
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l 9.0 PROCEDURE l
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li 9.1 Mark a 4-inch grid system on the cask and record the I*
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REVISION PAGE WM-013 F
5 of 7 O
grid system on paper as a permanent record.
9.2 Locate the radiation source along the centerline axis of the cask and position it at the midpoint of the plane of the top row of grid squares.
9.3 Take readings at each grid square on the outside of the cask in the plane of the source.
The probe will be in 5
contact with the cask surface when the radiation readings are taken.
9.4 Lower the source along the centerline axis to the midpoint of the next row of grid squares and repeat step 9.3.
9.5 Repeat step 9.4 until the bottom row of grid squares have been monitored.
9.6 Position the source along the centerline of the cask at a height equal to one cask radius off the bottom.
9.7 Take and record readings every 12 inches around the bottom circumference of the cask.
9.8 Position the source along the centerline of the cask at a height equal to one cask radius from the top of the cask.
9.9 Take and record readings every 12 inches around the top circumference of the cask.
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9.10 Average and record the six highest readings obtained in step 9.7.
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REVISION PAGE WM-013 F
6 of 7 9.11 Average and record the six highest readings obtained in step 9.9.
10.0 ACCEPTANCE CRITERIA 10.1 The radiation reading at any point on the cask circumference shall not exceed the value determined in g
section 8.0, except as noted in steps 10.2 and 10.3 l
10.2 The readings obtained in step 9.7 shall not exceed 125 percent of the average reading calculated in step 9.10, and they shall not exceed 50 percent of the value determined in Section 8.0.
O 10.3 The readings obtained in step 9.9 shall not exceed 125 percent of the average calculated in step 9.11, and they shall not exceed 50 percent of the value determined in Section 8.0.
11.
DISTRIBUTION Library (2 Copies)
RECO Engineering, Richmond, VA.
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7 of 7 FIGURE 1 PANCAKE PROBE CASK LIO s
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