ML20206E192
| ML20206E192 | |
| Person / Time | |
|---|---|
| Site: | 07109145 |
| Issue date: | 05/29/1986 |
| From: | Mccoy S NUS CORP. |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20206E196 | List: |
| References | |
| 27047, P86-0218-L9, P86-218-L9, NUDOCS 8606230200 | |
| Download: ML20206E192 (2) | |
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-o_o, RETURN IO 396-ss May 29, 1986 P86-0218-L9 g JW ~2 NO:57 Mr. Charles E.
MacDonald, Chief Transportation Certification Branch U.
S.
Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. MacDonald:
NUS Process Services Corporation has prepared a d'esign for Type A radioactive waste shipping casks, designated series 50.
The design is essentially identical to the casks already approved for use under NRC Certificate of Compliance USA /9145/A and does not change the results of the safety analysis report referenced in the C of C.
We request that you review our design and include our Model NUS-50 shipping cask on C of C 9145.
Our check in the amount of $150.00 is included to cover the costs of amending the C of C.
Eight copies of the drawings and procedures listed as enclosures to thia letter are provided to assist you in your review of our proposed shipping cask design.
The cask fabrication will be in accordance with our Quality Assurance Manual which was approved for packaging by the NRC on February 21, 1986 (Approval Number 0496, Revision No. 2).
Please contact me if you have any comments or questions about our NUS-50 cask design.
I look forward to your response.
8606230200 860529 PDR ADOCK 07109145 Sincerely, C
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Enclosures:
NUS Drawing 5025-M-2010, Revision A, sheet 1 of 1, "NUS Type A Transportation Casks - Series 50 Cask General Arrangements" NUSPSC Procedure WM-030,
" Operating Procedure for Type A Series, 50 Casks" NUSPSC Procedure WM-031,
" Maintenance and Inspection Procedure for Type A, Series 50 Casks" NUSPSC Procedure ' WM-Oll,
" Soap Bubble Leak Test - NUS Process Services Corporation l
Type A Shipping Casks" NUSPSC Procedure WM-013, f, e
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" Gamma Scanning 6f' Lead' Shi~elding '~fo'r'NUS 'Ty'pe Casks" O 1.6 J )
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? /~ ONd-- DOCKET NO. J78 Y 7 CONTROL NO. O[ I[- DATE OF 000. DATE RCVD. b O FCUT PDR - - FCAF LPDA la E RET. SAFEGUARD 3 - FCTC V OTHER DATE 47 [d NITIAC ks I
I t ~ NO. REYlSION PAGE WM-0111 E 1 of 7 TITLE PAOCESS SEAVICES SOAP BUBBLE LEAK TEST m NUS PROCESS SERVICES CORPORATION W ANM TYPE A SHIPPING CASKS l' i ( ~ i. 1I COPYRIGIIT C 1985 BY NUS PROCESS SERVICES CORPORATION ALL RIGIITS RESERVED. NO PART OF T!!IS DOCUMENT MAY BE REPRO-DUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL, INCLUDING PflOTOCOPYING, RECORDING OR BY ANY INFORMATION STORAGE AND RETRIEVAL SYSTEM, WITl!OUT PERMISSION IN WRITING FROM NUS PROCESS SERVICES CORPORATION, EXCEPT FOR STRICTLY CONTROLLED DISTRIBUTION, FOR EVALUATION PURPOSES. Pb )721y'7 / M - / E $lkdd&- 94 % Ul.M T4WY (Warha - i. N NM 'ORl6tNATOR DATE CHECKED DATE ~ 0A MTE' / MANAGER DATE NUS, PROCESS SERYlCES b;. ,JP"'
m,- WM-Oll E 2 of 7 TABLE OF CONTENTS Page 1.0 PURPOSE 3 2.0 APPLICABILITY 3 3.0 DEFINITIONS 3
4.0 REFERENCES
4 S.0 RESPONSIBILITIES 4 6.0 EQUIPMENT '4 ~ 7.0 PROCEDURE 4 4 8.0 ACCEPTANCE CRITERIA 5 9.0 RECORDS 6 Figure 1 - Test Performance Form 7 / c. i - $ \\ ' f d P 1,i M, =[ ,e pv, y - i _.h, A'
... - _ b T. T ) wo. Revision Peet WM-Oll E 3 of 7 ~ 1.0 PURPOSE This procedure states the require'ments for performing a Low Pressure Soap Bubble Leak Test for NUS 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 psi are adequate to meet contractural/ functional l requirements. 2.0 APPLICABILITY This test shall be performed before painting on all NUS Process Services Type A shipping casks prior to acceptance from a fabricator. Additionally, the test shall be performed yearly as a verifi' cation 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 3 atm.cm /sec is required. 3.0 DEFINITIONS None. i l
4.0 REFERENCES
j 4 4.1 ANSI N14.5, 1977 - American National Standards for leakkge tests on packag'es for shipment of radioactive materials. 4.2 Code of Federal Regulation (CFR) Title 10 Part 71 s,,. Sn.. ? -. - ~p
..:... ) No. nEvislON PAGE WM-Oll E 4 of 7 5.0 RESPONSIBILITIES l Ouality Assurance Manager or his designee - shall witness the performance of the applicable leak test and sign the test performance form (Figure 1). 6.0 EOUIPMENT The following equipment is required for a Low Pressure Soap Bubble Test. 6.1 Air Supply - A standard shop compressor or bottle 1 compressed air capable of pressurizing the tested cavi-ty to 8 to 10 psig shall be utilized. 6.2 Gauge - A' properly calibrated gauge capable of indicat-ing 0 - 15 pai range with an accuracy of + 24 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 60623 6.4 Relief valve - A relief >' valve set and checked at 10 percent'over maximum pressurization pressure. 7.0 PROCEDURE ^ 7.1 The test shall be conducted.by NUSPSC Q.A. approved personnelU 9 'v L -...-.
., k NO. REVIS80N NGE WM-Oll E 5 of 7 7.2 The item shall be leak tested with all lids, gaskets, plugs, valves, and fasteners in place and in the normal closed position. The only e'xception shall be the port or valve utilized to pressure the cavity. 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 6 solution to all gasketed 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. s. 8.2 If bubbles appear during the test, weld integrity, gas-ket condition, flange or lid tightness, valve position, plug security, etc., shall be checked and the test rerun. i 8.3 The results of the leak test shall be recorded on the a Test Performance form (Figure 1). 8.3.1 Leak Test Pressure 8.3.2 Gauge Model, P/N and S/N, as applicable 8.3.3 ' Leak Test Duration 8.3.4 Date f' 8.3.5 Results, including discrepancies and accept'ance A
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NO. pgyggg pagg WM-011 E 6 of 7 9.0 RECORDS Test Performance forms shall be maintained by the Quality Assurance Manager for one (1) year after completed usable life of tested item. ma t e O Ge r + y
Jb s m No. f4EVISloN PAGE WM-011 E 7 of 7 Figure 1 TEST PERFORMANCE Equipment Tested: Date Tested: Leak Test Pressure: psi Gauge Information: Model # 6 Range Calibration Date Leak Test Duration: minutes PASSED FAILED Discrepancies: l Next Leak Test Due (< 12 months): Date Signatures: Test Performer Date Quality Assurance Date
r -r a e 4 NO Rf VISION pact NUS ~~ 101-013 E 1 of7 vartt PROCESS SF AVICF S (;AMMA SCANNING OF LEAD SillELDING FOR NUS TYPE CASKS Q.s e i,in.i.,i,,.....,o.., i, 1NCONTROLLED COPY gM /) _ / s \\ ') W/?- ll-??- 0 llAg>< b f5?y!'kkY bN YMU E 56%% / f '/ d A f Mjdd M adA 'No D ffMoods'k 'No &I%6.6.Au% %Weu%,UAt %L AL.sitMwu B sMMa%b6s.v% ' 9% M at wA6s /J A f A 0huv ~~ R M&X72,MS 6 v%' V4/G CM4i2 4AMddM > gilGINATOR '0/TE CHECKEb OATE'8 OA DATE " NANAGER '0AiE NUS PROCESS SERVICES
F NO. REVISION PAGE WM-013 E 2 of 7 TABLE OF CONTENTS Page t 1.0 PURPOSE 3 2.0 APPLICABILITY 3 3.0 DEFINITIONS 3
4.0 REFERENCES
AND APPLICABLE DOCUMENTS 3 5.0 PROCUREMENT PROJECT MANAGER 3 6.0 PERSONNEL QUALIFICATIONS 3 7.0 EOUIPMENT 4 8.0 CALIBRATION 4 9.0 PROCEDURE 4 10.0 ACCEPTANCE CRITERIA 5 11.0 DISTRIBUTION 6 Figure 1 7
m j t 1 NO. REVISION PAGE WM-013 E 3 of 7 1.0 PURPOSE This generic test specification procedure states the minimum requirements for gamma scanning of lead shielding for NUS Type casks. The fabricator shall submit for approval detailed gamma scanning procedures. 2.0 APPLICABILI1Y This generic procedure is applicable to all radioactive shipment casks or radiation shields fabricated for and procured by NUS Process Services. 3.0 DEFINITIONS None
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 OUALIFICATIONS Personnel conducting gamma scanning shall be familiar with the detailed procedures and shall be certified Level II or Level III radiographers in accordance with SNT-TC-1A. (Reference 4.2) )
f 3 ) " *0" NO. WM-013 E 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 tae lead and steel thickness being scanned. 8.0 CALIBRATION 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-ness, whichever is less. 9.0 PROCEDURE 9.1 Mark a 4-inch grid system on the cask and record the t
NO. REvlSION PAGE WM-013 E 5 of 7 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 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. 9.10 Average and record the six highest readings obtained in step 9.7.
NO. REVISION PAGE WM-013 E 6 of 7 f 9.11 Average and record the six highest readings obtained in I step 9.9 10.0 ACCEPTANCE CRITERIA f 10.1 The radiation reading at any point on the cask i j circumference shall not exceed the value determined in section 8.0, except as noted in steps 10.2 and 10.3 .i 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. I 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 T Library (2 Copies) Marty Booska RECO Engineering, Richmond, VA. George Antonucci
a NO REVISION PAGE WM-013 E 7 Of 7 FIGURE 1 PANCAKE PROBE CASK lC s / N f s- / h / I [C'ti l //i////I ! V///.// N/////J i- . ' I // // / N N \\ j s \\ \\ CAllBRATION \\ \\ PLATE \\ \\ N k s SEE j / \\ N ENLARGEMENT A j \\ \\ l k \\ ^ SOURCE N N N N N N \\ \\ \\ \\ Y//////////////////h ////////// ////////// '~ 7"
- PANCAKE PROBE CAllRRATION FIXTURE
( CASK LID l CLAf/.PlijG DEVICE g, \\ / . / / t CAllBRATION PLATE OISTANCE = INSIDE RADIUS OF CASK s_4 o %N SOURCE ENLARGEMENT A - NO SCALE}}