ML20062F874

Responds to & Forwards Addl Info Re 660 Series Type B Package Renewal,Including Engineering Drawings & Tech/Ops 741108 Application for Type B Status of 660 Radiography Device

ML20062F874
Person / Time
Site:	07109033
Issue date:	11/27/1990
From:	Podolak L AMERSHAM CORP.
To:	Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
Shared Package
ML20062F877	List: ML20062F874 ML20062F893
References
NUDOCS 9011280239
Download: ML20062F874 (26)

Text

{{#Wiki_filter:_ a4mersham Corpottion j 40 North Avenue Burhngton, Massachusetts 01803 Telephone (617) 272 2000 November 27, 1990 Mr. Charles E. MacDonald, Chief Transportation Branch Division of Safeguards and Transportation, NMSS U.S. Nuclear Regulatory Commission OWFN, 4E4 Washington, D.C. 20555 1

Dear Mr. MacDonald:

The following information is submitted in response to your November 15, 1990 letter regarding the 660 Series Type B package renewal: Ouestions 1. & 2. Enclosed find engineering drawings-for the remaining versions of the 660 which are currently-not listed in the USNRC Type B cer-tificate issued October 5, 1990. In addition to the wide body 660, the 660B and the 660E currently approved on the USNRC Type B certificate number 9033, Amersham requests inclusion of the following 660 versions in the same USNRC Type B certificate: Model # Drawina # Revision DescriDtion 660 66025 Narrow Body Pre-automatic lock 650A 66030 A Narrow Body Retrofitued w/ automatic locking mechanism 660A 66030 B Wide Body Retrofitted w/ automatic locking mechanism Amersham Corporation no longer manufactures the narrow body 660. Regarding the retrofitted versions (660A), no fabrication or { welding operations as described for the 660B apply, however, the i inspection and testing procedures described in Section 8 of the 660 Operations Manual will be followed for all retrofitted units prior to their return or redistribution to specific licensees. Question 1 l The maximum activity requested for the narrow body Model 660 and the Model 660A's is 120 curies of Ir-192. Regarding the weight I; and dimensions of those devices, only the narrow body 660 and 660A will have smaller weight and width dimensions than those previously approved on the October 5, 1990 certificate. 9011280239 901127 !b pn noocx0710;'s AmWSham dfbi

4 Charles E. MacDonald U.S. Nuclear Regulatory Commission Page 2 3 r Enclosed are copies of Technical Operation's November 8, 1974 application for Type B status of their 660 radiography device. Please note that the general description of the device at the time of application was for the narrow body 660 (width = 4.75 inches, and weight = 44 pounds). Included with the November 8, 1974 application are radiation profiles'for this narrow body device with the smaller depleted uranium shield, as well as results of the 30 foot drop and 40 inch puncturn tests. Also enclosed in a copy of the May 5, 1977 USNRC Type B certificate for the 660 and 660E radiography devices which'is based on this November 8, 1974 application. Qugation 4. Enclosed is a revised version of page 28 of our original application which corrects the mailing address of the Department of Transportation. In addition, the maintenance procedure has been revised to include consideration for davices with either automatic or non-automatic locking mechanisms. Should you require any additional information regarding this application, please contact me at (617) 272-2000, extension-230. Sincerely, t 614kSJcdedh$[ Lori Podolak Radiation Safety Specialist Enclosures P h .c..... ~

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MODEL 660 EXPOSURE DEVICE OPERATION MANUAL NOTICE This device is used as a radiographic exposure device and Type B(U) transport package for Amersham Corporation radioactive sources listed in this manual. The user should become thorouchly familiar with'the instruction manual before attemotina coeration of the eculoment. In order-to use this equipment to perform industrial radiography within the United States, the user must be specifically licensed to do so. Application for a license should be filed on Form NRC1313 with the appropriate U.S. Nuclear Regulatory Commission Regional Office listed in Appendix D of 10 CFR 20 or with the appropriate agreement state office. Prior to initial use of a radiographic exposure device as a transport package, the user in the United States must register his name,-license number and package identification number with: Director Office of Nuclear Material' Safety and Safeguards U.S. Nuclear Regulatory Commission Washington, D.C. 20555 The user must have in his possession a copy of USNRC-Certificate of Compliance No. 9033 issued for this package. Prior to the first export shipment of this exposure device from the United States, the user must also register his identity with:. U.S. Department of Transportation-Office of Hazardous Materials Technology 400 Seventh Street S.W. Washington, D.C. 20590 The user must have in his possession a copy of International Atomic Energy Agency Certificate of Competent Authority Number USA /9033/B(U) issued for this radiographic exposure device. Users of this equipment outside the United States must comply with the regulatory, licensing and transportation rules and regulations as they apply in their respective countries. General ( The Model 650 series' portable gamma radiography system-are used j l primarily for incastrial radiography. The systems operate in similar l manner and differ only in the specific control unit supplied. N l L NOVEMBER 1990 PAGE 28 - - ~ +-

t i Maintenance Ouarterly Maintenance At intervals not to exceed three months: (a) Clean,. inspect and maintain the drive cable, control housings and source guide tubes as follows: j u I 1. Disconnect the control unit from tide exposure device. 2. Turn the hand crank of the control unit in the EXPOSE-(counterclockwise) direction until the crank will-no longer turn. Do not use force, as this may damage the drive wheel inside the control box. The emergent cable should be cranked into a bucket or other container to keep it clean. 3. Disconnect the control housing from the RETRACT side of the crank and remove the stop spring from the drive cable. The drive cable will now pass through the crank. 4. Turn the crank until the drive cable is-totally disconnected. 5. Pull the drive cable out through the Model-661 control cable connector and coil it with a radius of no less than 4 inches. ? 6. Remove the Model 661 control cable connector and-connector plug from the control housings, and d disconnect the other control housing from.the crank. Label the housings for proper reassembly.- 7. Clean the drive cable with 1:1:1 trichloroethane solvant and flush the control-housings and source guide tubes. (Observe the solvant manufacturer's recommended precautions.) 8. Using compressed dry air (15 psi max.), thoroughly dry-the drive cable, control housings and guide tubes. Any remaining solvent can cause permanent damage. 9. Check the source guide tubes'for binding by holding them vertical and dropping a dummy source (or jumper) through them. 10. Wipe the guide tubes and control housings with a cloth soaked in trichloroethane and flex them to check for internal damage. Damage is evidenced by a crunching feeling when the housing or tube is bent. While doing j this, feel foc dents. Cut, flattened or burnt control housings or guide tubes should be repaired or replaced. ) i REVISION 3 H NOVEMBER 1990 38

1 11. The guide tubes or control housings may.be covered with' tape where only the outer plastic is_ cut through. 12. Use the NO GO:(TAN 550) gauge to check for wear in the female slot width of the source' coupling. (See Figure 7.1.) 3 The gauge thickness-should NOT GO in the slot. -The source fails the test if the. gauge can enter the slot;: in which case contact Amersham for advice on disposal of the source. Use the gauge also to check the drive cable male coupling: Check the ball diameter and shank. Couple the cable to the source and check the. connector gap width. In each case the gauge must NOT GO. If the ball of the connector fits through the-' hole'of; the gauge or the ball shank fits into=the slot in the, gauge, the connector is worn and the cable must be replaced. 13. Lightly grease the cable using-MIL-G-23827 B grease. Other greases may form tars or corrosive compounds when exposed to radiation. l (b) Clean and inspect the projector for wear or obvious damage. Report any defect which might affect safe operation and l-withdraw from service until repairs can.be effected. l (c) See that the radioisotope warning labels are ser.are and legible. Do not' cover with any other labels. l (d) Check that the source-outlet shipping plug is-in place and that the screw and nut turn freely, init are not loose. (e) Check that the selector ring and lock mechanism operate-freely. If operation is faulty, contact Amersham to arrange servicing or see the appropriate section~on-Complete Service in this manual. Comolete Service Equipment which is used under good conditions should obly require complete service annually. In addition to the schedule of operations listed in Quarterly-Maintenance, the connector and the lock mechanism must'be stripped for maintenance. This service requires removal of the source,'which is potentially a dangerous operation together with work on components which are critical to safety. REVISION 3 NOVEMBER 1990 39

F This service must be'done only by persons specifically trained and qualified for this work. Amersham will service these units et one of their laboratories or in the field on request. Alternatively, trained and qualified persons who wish to do'this work should use the applicable procedure which follows~ based'on the type of locking mechanism installed on their device. Devices with Non-Automatic Lockina Mechanisms (a) Use the NO GO (TAN 550) gauge to check-for wear in the female slot width-of the source coupling. (See Figure 7.1 ) The gauge thickness should NOT GL in the slot. The source fails the test if the gauge can enter the-slot; in which case contact Amersham for-advice on disposal of the source. Use the gauge also to check the drive cable male. coupling: check the ball diameter and shank, couple the cable to the source and checkLthe connector gap width. In each case the gauge must NOT GO. Proceed with (b) if the source coupling passes.these tests. (b) Transfer the source'out of the projector and into a source changer for safe storage. This transfer must be carried out in a restricted area by licensed and properly trained personnel. Use a survey meter to ensure that the source l's properly transferred. Remove the source identity plate from the projector and fasten it with wire onto the source changer. The source must be replaced by a test connector jumper (found inside the-cover) so that when the drive cable is returned to the projector storage position, the drive cable control can be removed from the projector. (c) After removal of Source Assembly, carry out a wipe test on the inside of the 'S' tube to check for uranium contamination. Uranium is slightly radioactive, so the wipe test swab should be sent to Amersham'in a~ sealed plastic container to be checked for low level radioactive contamination. {. REVISION.', l NOVEMBER 1990 40 i

I I l I i The presence of uranium indicates wear-through'of the 'S' tube. It is recommended the projector be:taken out of service. Contact Amersham for recommendations., Clean the tube with a swab soaked in 1:1:1 trichloroethane l solvent-(observe the solvent manufacturer's recommended ~ precautions). (d) Cover Plate Removal' ~ 1. Remove the Danger Tag (secured _ with rivets) 'from the bottom of the rear plate. 2. Remove the rear plate by unscrewing the six phillips -head screws securing it toithe-exposure device body.- (e) Unlock the connector' lock, and then remove the 10cklassemblyx and control: unit connector assembly by. unscrewing'theEsixL socket head' screws securing them to the. rear. plate. l (f) Disassemble the,contro] unit connector! assembly,Ereferring to Figure 7.2 for component identification.and>for order of-removal. There are several spring loadedLparts in the connector assembly, so care should beLtaken that these parts are not lost. (g).To disassemble the, lock assembly,creferto Figure 7.2[for. l component. identification and:for order of' removal; Remove-l the lock-(2) from the lock retainer-(3) byLunscrewing the screw (4) and turning the key about 90' degrees.7 (h) Remove the front end plate from the exposure device, and remove the guide tube: connector and-retaining ring with Tru-Arc pliers, referring to Figure 7.2. Theihandle1may be'left on the front' plate. (i) Clean all. parts in trichloroethane andiflush the source tube with solvent. Dry.-the parts and using dry compressed air (20fpsi the source tube. thoroughly maximum).. ' clean the 'S' tube in the exposureLdevice by running a cloth / soaked with trichloroethane through it several times. Dry the 'S' tube by running a' dry cloth through-the tube.. 3 (j) Inspect all parts for damage or" excessive wear, and replace if necessary. Use Figure 7.2 foricomponent identification numbers. (k) Lightly grease all moving partsoat their? contact' surfaces with MIL-G-23827 B grease or equivalent.- (1) Reassemble the front end plate, and secure it.to the exposure device with-the proper. screws. REVISION 3 NOVEMBER 1990 41

b l ( (m) Reassemble the lock by-placing:the return springs and spring guides into the lock-(2), depressing'the internal' plunger, inserting the lock-(2) into the11ock retainer (3), and securing the lock with the set = screw'(4). t (n) Attach the lock assembly to the rear-plate with;two socket head screws. (o) To reassemble-the control unit connector-assembly,-refer to Figure 7.2. (p) Refer to Figure 7.2 and place the_ compression spring ~(11): on the hub of the' selector ring retainer.. The spring should-be firmly seated over the hub. LThen place'the' sleeve-(12) on top of the compression spring (11). (q) Place the selector body (6) on a flat surface so that -it is resting on its 5/8" hub. (r) Insert the two short' compression springs (8)'and locxing; pins (7) into the1 holes on'the' edge of.the1selectoe body. (s) Place the selector ring (10) over the selector bod'y (6) while restraining.the-locking: pins'(7). Ensure thd the lettering (OPERATE-LOCK-CONNECT) on the selector ring is facing up and that the stopipin on the selector body is in the cam slot of the' selector _ ring. _.his is shown in' Figure 7.2. (t) Hold the selector ring (10) andfselector body (6) together and place them over the assembly shown'in Figure 7.2. The resulting assembly'is shown in Figure-7~.2. Align the resulting assembly such that the two large holes in the.. selector ring retainer ~(9)-line up with the twoLlarge holes-in the selector body (6). The internalnlocking cam will partially block.these holes. (u) Insert the anti-rotation lugs (13).and long compression springs (14) into the two large holes in the selector body. Secure the resulting assembly onto the rear. plate with four socket head screws. The word OPERATE should be facing-outward, and should be in the.12 o' clock position.- (v) Connect the jumper to the.short length drive' cable and-I insert the cable through the rear end plate.and control unit-connector assembly, tw) Insert a "U-tool" into the control unit. connector assembly and check the operation by turning the/ selector ring from-OPERATE to CONNECT several times. If1the connector assembly does not operate properly, disassemble.and inspect the parts for damage and proper alignment. 'Relubricate the parts and reassemble. REVISION 3 NOVEMBER-1990 42 .~. -. ~,

(x) Secore the rear-end plate to the exposure device and handle using the six attact.ing phillips head screws and replace the protective plate over the bottom two rear' plate screws using pop rivets (0.125 in diameter by 0.295 in long). (y) Check the-system for proper reassembly. Check all conne-tions and fittings for tightness.- Check for proper 1 operation of the control unit and control unit' connector assembly. (z) Transfer the source from the source _ changer back to the projector as described in-the source. transfer procedures in'this manual. Use a survey 'aeter to check that radiation levels do not exceed 2.mSv/h, (200 mR/h) at any point on the. surface.-- Replace the source identity plate'back on to the projector. Check that the fixed labels are in good condition. Devices with Automatic Lockina Mechanigag (a) Use the NO GO (TAN 550) gauge to check for. wear in the female slot width ~of the sourceJcoupling.- (See Figure 7.1.) The gauge thickness should NOT GO in the' slot. -The source fails the test if the. gauge can-enter the slot; in~which n case contact Amersham for advice on disposal of the source.- Use the gauge also to check the drive cable male coupling: Check the ball diameter and shank. Couple the cable to-the source and check the connector gap width. In each case the gauge must NOT GO. Proceed with (b) if the source-co'upling passes these tests. (b) Transfer the source out of the projector and into a source changer for safe storage. This transfer must be carried out-in a restricted area by licensed and properly trained personnel.. Use a: survey meter to ensure that,the source'is properly 1 transferred. Remove _the source identity plate from the projector and-fasten it with wire'onto the source changer. The source must be replaced.by a test connector jumper (found inside the' cover) so that when the drive cable is ~ returned to the projector storage position, the-drive cable control can be removed from the projector. ' REVISION 3 NOVEMBER 1990 42

t 1 (c) After removal of Source Assembly, carry out a' wipe test on the inside of the 'S' tube to-check for' uranium-contamination.- Uranium is slightly radioactive,.so the wipe test swab should be sent to Amersham in a' sealed plastic container to be checked for low level' radioactive contamination. The presence of uranium indicates wear-through of the 'S' tube. It is recommended the projector be taken~out of service. Contact Amersham for' recommendations. Clean the tube with a swab soaked in lil:lltrichloroethane solvent (observe the solvent manufacturer's recommended precautions). ? (d) cover Plate Removal 1. Remove the Danger Tag (secured with rivets)'from'the i bottom'of the rear-plate. i 2. Remove the rear plate'by unscrewing the six phillips head screws securing it to the exposure device-body. (e) Refer to Figure'7.3 and: dismantle the: selector; assembly ~ i taking care not to lose.the spring loaded parts. Remove the lock (2) from-the11ock' retainers (3) byJundoing screw (4) and turning the' key through 90 degrees. t (f) Remove 4 screws securing the~ front endEplate. t Remove the guide tube connector nut (17)l:andl retaining ring (18). (g). Clean all parts with trichloroethane and inspect for wear. l Replace as necessary.- A 1 When ordering spare parts, quote the serial number of the projector as well as the component number to ensure correct replacement.- (h) Lightly grease the inside surfaces of the selector ring (10) and-the lock retainer (3) using type MIL-G-23827 B grease. 4 Note that other types of grease may form tars when exposed to radiation. Lubricate the lock barrel (2)1with 2-dropsLof light oil. All screws should be treated with 'VIBRATITE'. REVISION 3 NOVEMBER 1990 44 i _. _, -. -. _ - -. + ~,.. ~

I ~ t Reassemble the lock by placing the retcrn springs and spring guides into the lock, depressing the internal plunger _(5), inserting-the lock into the retainer (3) and securing-the lock with the cap screw (4). Attach the. lock assembly to the mounting plate with two socket screws (1), (i) Begin the Selector Assembly reassembly by lightly coating the components with type MIL-G-23827 B grease. See Figure 7.3. Hold rear end plate horizontally, face up. and the lock in J the il o' clock position. (NOTE: The face plate may be held carefully in a vise or other fixture so as to free both-f hands for this. assembly procedure.) l Insert the 5/8 diameter of the selector body (6) into the mating hole in the center of the rear plate. The narrow end of the slot opening is to be at the 3 o' clock position. Locate the locking slide (7) and return spring (8) into mating slot of selector body. Place the selector ring (10), with the work " CONNECT" at the 12 o' clock position, over.the selector body. Push the locking slide in slightly soLthe selector ring will clear and rest the selector ring on the_ top surface of the selector body. Insert springs'(14) into holes at the top and bottom of the selector body. Place the anti-rotation lugs (13) over the springs. ~ Place the sleeve (12), with the large' diameter facing down, on the center of the locking slide. Place the spring (11)' l over the sleeve. l l Install the selector ring retainer (9) into the selector l ring. Ensure that the three non-threaded holes line up under the' word " CONNECT".- See. Figure 7.3... Depress the. l selector ring retainer into the selector ring until.its top is flush with the" top of the selector ring. (j) While. holding the assembly firmly-against the end plate,. turn it over to expose the back side. Install the.four i socket head screws-(15) and the lock washers (16) to secure I the connector assembly to the rear plate. l Insert the "U-Tool" into the top and bottom holes of the selector assembly. Rotate the selector ring toward the " OPERATE" position. Remove the "U-Tool". Continue rotating to " OPERATE" position. REVISION 3 NOVEMBER 1990 45

c j i Push the locking slide until'the sleeve snaps into place. (k) While still in the "0PERATE" position, wind out'a shorti ~ length of the drive cable and pass-it through the front of i the selector assembly.- Couple the cable to the test jumper connector =and withdraw it into the selector assembly. Pull on the cable and confirm that the locking. slide snapsi E shut to lock the connector in;the. safe _ position. Push _in the locking: slide and-repeat to assure smooth operation.- If smooth operation is'not attained, disassemble the selector assembly and_ thoroughly inspect ~ components for rough edges, burrs, etc.-which_could cause1 jamming or. irregular selector assembly action. Replace parts as necessary. Re-lubricate

• the components'and' reassemble the selector assembly.

Run.through the normal' operations of the lock and: selector assembly. (1) A gap ofcat least 0.53'mm (0.021 in) should:be visible between the drive cable collarzand the celector ring and it should be impossible,to rotate the ring. Do'not-use excessive force. See Figure 7.3. l If the selector ring can be rotated, this indicates U unacceptable wear, distortion, or damage in the connector, lock mechanism or drive cable connector which must be corrected before using the equipment again. (m) Secure the rear end plate to the_ exposure device and handle using the six attaching phillips head _ screws /and replace the protective ~ plate over the bottom two rear: plate screws using pop rivets (0.125 in diameter by 0.294 in long). (n) Lightly grease the guide tube connector nut hub with MIL-G-23827 B lubricant. Reassemble to the front mounting plate, ensuring that the retaining-ring is seated in the inner:slet. Secure the mounting plate to the. projector. Inspect the-shipping plug, making sure that the lead insert is present. (o) Run through the normal operating sequence several times, using the test connector or a dummy source assembly (non-radioactive), to ensure smooth operation.. (p)' Check that the fixed labels are in good condition. (q) Transfer the source from the source changer back to the projector as described in the_ source transfer procedures in this manual. REVISION 3 NOVEMBER 1930 46

..m._.. e Use a survey meter to check that radiation levels do not exceed 2 mSv/h,-(200 mR/h) at any point on the surface. Replace the source identity plate back on to the projector. WARNING j Some operators use the misconnect test on the fully assembled projector complete with its radioactive source. If this is done,. proper safety precautions must be carefully observed: The source exit port must be closed by the shipping plug securely screwed in place. When the cable connector is presented to the projector (without coupling the cable to the source) care must be taken to ensure that the selector ring is NOT turned past the LOCK position. If the ring can be turned at all, the equipment is faulty. This procedure has the advantage of testing.all the connector components and selector mechanism simultaneously, but risks losing control of the source if the components are worn or damaged and the selector ring is rotated past LOCK. i REVISION 3 NOVEMBER 1990 47

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y '8-e i a y1 'O /g/ 6- \\ i '5 R , p' g - 3 i W 12 AMERTEST* 660 GAMMA NAY PROJECTOR - I 1 000 Repelt Kit II I Port # Code Kit 402 9 .j Ret # Cet Code U.S.A. Oty Deecription Oey in Kit [ 1 TMN) 2 Socket Head screw 10-32A5/6 in. 4 2 TSN66011 66001 11 1 Lock DAW 4 d.L ,i 3 TSN06012 66001 12 1 Lock Retainer 6 1 Screw (suppliedWAtom 2) 1~ ,~ 6 1 InternalPlunger 6 TSN66001 66001 1 1 Selector Body 10 7 TSN66005 660015 2 Lacking Pin 8 TSNO321 2 Compression spring (LC-032E.1) 2-6 of E R A T g 9 TSN66003 66001 3 1 Selector Ring Retainer i 10 TSN66006 66001 6 1 Selector Rin0 g0 11 TSN0641 1 Comp #ession Spring 1 6 t 0 12 TSN66004 66001 4 1 Sleeve \\ 13 TSN66006 66001 6 2 Ann Rotaton Lugs 7 t 14 TSN0267 2 CGT4:u5 Spring 2 E 15 TMN1 4 Sockot H6M Screws 8 l 2 10 32x11/4 in. (st. steel) )Q 'l 4 16 TMN1 4 Lod Washer, #10 4 17 TSN53311 53301 11 1 Guide Tube Connector Nu' 16 TMN1 1 Retaining Ring 19 TSN002 LBL 010 1 Sourceidenuncaton Plate 20 1/4 20x3/4' PH Screws 8 21 66001 811 Key 2 22 4 4-40 3/16 BHMS (lor lock) 4 10 ~ 23 1 6-32 x BM (for 2 6 24 10-32x3F S.S. Allen Screw 4 i 66001 20 1 Jumper Connector 1 O @+ 830 Drill Bit 1 12 IF S.S. Pop Rivets - 12 1 6 Unks of Cover Chain 1 1 84 Scott Drive Saews W 2 k GRE TUB Grease 1 664CL Check Ust. 1- 'i MAN 006 1 660 Operabons/Maint. Manual l L -J l Figure 7.2 a l

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