ML20210L234

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Informs That Panasonic Co No Longer Sells,Markets or Possesses WE 2001 Series TLD Irradiator & That Device Registration Certificate NR-531-D-101-S Has Been Changed to NR-8078-D-801-S
ML20210L234
Person / Time
Issue date: 03/24/1997
From: Compton E
NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To:
NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
Shared Package
ML20210L129 List:
References
SSD, NUDOCS 9708210029
Download: ML20210L234 (67)
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DATE: March 24,1997 TO: File NR 8078-D-801-S (Formerly NR-531-D-101-S).

FROM: Eric Compton, Engineering Co-op NMSS/IMNS/IMAB f. C,

SUBJECT:

inactive Status of TLD Irradiator in a telephone conversation with David Katzman of the Panasonic Company on February 10,1997, he stated that the company had not sold the product since mid 80's, in the interim several companies have had distribution of the WE 2001 Series TLD '

irradiator. However, since the device may be drop-shipped to the DOE or its prime -

contractors without the issuance of a formal certificate of registration under 10 CFR Parts 40 and 50, Performance Data Company, in Florida, is currently distributing these deviges and is pending for a device registration certificate through the state of Florida. Therefore, since the Panasonic Company no longer sells, markets, or

_ possesses the device registration certificate NR-531-D-101-S was changed to NR-8078-0-801-S.

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97 82 029 970804

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February 10,1997 Panasonic industrial Compnay -

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-(201) 348-5500 5339 David Katzman L-Spoke to David Katzman about making NR-531-101-S inactive. He stated that the Panasonic company hasn't sold the product since 1985,' and they no longer provide services. Services-are provided by a firm in South Africa and Performance Data Co.

Contact:

Bill Vaughn Performace Data Co. - < Florida >

(305)232-0504

Phone Log: Performance Data 3/6/97 leR telephone essaga.

3/7 received telephone message l

3/12 left telephone message 3/14 Conversation w/ Bill Vaughn

- Two other companies have distributed the WE 2001 Irradiator, after Panasonic -

. discontinued (1987). Performance Data Co, has been distributing and providing sarvices (with exception to sealed sources, handled by cus'omer through Amersham) for the Irradiator since 1993.

Performance Data currently is pending for a registration certificate through Florida.

Application was summitted in 1995 and Fees collected.

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GENERAL The WE 2001 PC TI.D Irradiator has been designed to give the user greater flexibility, as !!is controIIed by a Personal Computer.

The WE 2001 PC Irradiatoris designsd to irradiate 500 dosimeters in 10 rocks Irradiating each dosimeter sequentially. This process Is fully automated. In designing the Instrument the safety of operators has

- been given top priority.

q Two independent lockable doors have been incorporated. One L

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door to prevent access to the compartment contolning the lead 1 2 I

castle with CS 137 source, (2 Cl) and tho other forlocking of the

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SOFTWARE A Menu Type Software has been written in such a way as to make it extremely userfriendly;eg: ~ - In the event of a powerfailure the postilon of the last dosimeter Irrodlatedis remembered by the computer. This allows the user to carry on where the Irradiation cycle was Interrupted. e - The Software allows the user to enterditferentIrradiation times (ranging from I second to 9999,9 seconds in 0,1 secondIncrements), for dosimeters in the various rocks and slots. These times are stored on diskin case ofpowerfailure. - The date andtime of day can be enteredandaprintout .?. ofirradlaflon times foreach ~' i I dosimetercan beprintedon an optionalprinter. hgg ~- .a - The screenis =.. $:= constantlyupdatedio display the doslmeter yy *i slotnumberandrock numberofthe r,i dosimeterbeing

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i irradiated. 90 - Allfallures ofIlght )Q powersup,Ilmitswitches, sensors r~ piles, stepper f in motols, etc. are ii displayedas an error L,' ~

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computerscreen, u ' ' ~ keeping the cost of fault Nl l finding to a minimum. \\? The computerisnot O. dedicatedto control b theIrradiatorand con actas on extra computerin a

f department while the Irradiatoris notin use.

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t iEAD CASTLE The dose rates as measured on the lead l surface are asindicated. n um The lead castle incorporates a removable filterIn whichperspex andleadsheets con be mounted. The perspex is used to minimise the eifect of ,f over response due 90 electrons. 3" The 2 Cisource is located at a short distance from the dosimeter which results in on exposure rate of approx. 37mRIsec. Sources with lower activlty are also available. ) P OTHER WE PRODUCTS TLD Packaging Machines TLD Cleaning Machines Automated Samplo Changers am WILLISTON ELIN nummmes

W l TLD IRRADIATOR WE 2001 SERIES A i OPERATING AND SERVICE MANUAL-i- i i 1 j' 3 2 1 l 1 A

1. THEORY or OPERI. TION The WE 2001 TLD 1rradiator is designed to accomrodate 10 magazines of 50 dosimeters each (ie 500 dosimeters). The magazines do not have to be fully loaded with dosimeters and also do not necesstrily be loaded in consecutive rack positions. On pressing the start button on the electronic consule the rack motor will drive the rack to the positicn of the first magazine found in the rack. The feed motor will then feed the magazine through to the lead castle containing the Cs 137 irradiation sourev The dosimeter aim will lift t:ee first dosimeter out of the magazine and place it in front of the source for irradiation. The time of irradiation is preset by the timer in the electconics console. Af ter the preret period the dosimeter is replaced in the magazine and the next dosimeter is found. This process is continued until all dosimeters in one magazine have been irradiated. The magazine la then returned to the rack and the next ( magazine continues the process until all racks loaded have been completed.. At the end of the cycle an intermittent alarm is given to advise the operator. Indicators The electronics console has two LCD displays marked rack and dosimeter, a) Rack This indicates which rack number containing a magazine is being irradiated. b) Dosimeter This indicates which dosimeter in the magazine being irradiated ? Interlock a) There is an electronic interlock in the instrument which prevents operation of the instrument under any alarm condition. Timer The timer which is located on the right hand side of the top rack can be set for preset irradiation times by means of the thumbwheel switches from 0,1 e to 9990 hrsi

l l 1 l I 2. OPERATION L.O. A.D..I N.G. a) open door on rack in order to laod magazines b) Load magazines which are numbered 1-50 with 1 closest to lead castle (ie. the gear teeth on magazine towards the back of the instrument). c) Af ter laoding make sure that the rack door is closed again to ensure correct operation of the instrument. A.L. A.R.M.S There are iour continuous alarms indicating iaults and one intermittent alarm indicating completion. All alarms can be silenced by pressing the "stop" button on the electronic consule. Note: If the "stop" button is not pressed the machine will not start, (~ Type of alarms: a)" Source position" This alarm will occur if the " start" botton is preased to commence irradiation and the sourt;e is not in the correct position for irradiation and the LED will light. Turn handle until it presses against the limit switch on thu lead castle and the LED on the electronic console will turn off. The alarm can be silenced by pressing the a gtop' button. b) " Rack Fault" This alarm indicates that the door en the rack has not been closed properly. Press the "stop" button to silence the alarm and close the door to turn off thC L.E.D. c) " Double mag zine" This riarm indicates that a magazine has been doubly loaded into the instrumeng. One will be under the lead castle and the place in the rack for it to return tG will have also been loaded with a magazine. Press the "stop" button to silence the alarm and remove the magazine to turn the L.E.D. off d)

  • Power Failure" This L.E.D. will light and the alarm will sound, if a power failure occured during the irradiation of dosimeters. One should look to see which magazines have been completed and these should be removed from the unit. On pressing the stop button the machine will return the magazine of dosimeters being irradiated to the rack and the rack will move to the fully up position.

On pressing the " start" button irradiation of the rest of the magazines will comence, e) On c.ompletion of a full cycle a 1 second intermittent alarm will sound to makc the operator aware of this.

3. g) If, as dosimeter gets stuck on leaving or being returned to the dosimeter magazine a time out will occur. The same will occur if a rack cannot be fed by the DC motor in under the lead castle or be returned to the rack. This alarm is a 0,1 sec. intermittent alarm, which turns of f all motors and can be reset by pressing the "stop" button. This also resets the machine to start position. All magazines that have been irradiated must be removed to avoid double irradiati i s" (

4. ASSEMDLY OF LEAD CASTLE AND LOADING OF SOURCE

1. Remove the aluminium plate separating the lead castle from the rack. Note Leave square tubing cross bar and angle brackets so as not to have tocsettlight barrier after loading of lead.
2. Locate no. 5 on the lead castle assembly drawing, (groves machined at base of lead To load, move block carefully forward towards the dosimeter push-up assembly (alum inium bridge no 19 containing brass moveable push-up rod) until it just seats.

Note; For easy loading use handles supplied in spares box. Push bolts through to h. in lead block.

3. Locate lead block no. 4 (block has groves machined at lower end). Move this block gently into position with flat end towards dosimeter push-up assembly 19.

Screw the two lower 8mm bolts with steel spacer 18 into lower lead ring at this stage.Lo&d block 3,2 and 1 sequentially in the same manner. Screw 1 to lead block with 8mm bolts supplied.

4. Locate sleeve 8. Leave whole assembly mounted as is. Remove nylon stop and turn han

( so that source holding screw is visable. Remove 1 m loading rod 21 from frame of instrument located on the inside of lef t hand door. Remove hook 22 mounted on cros bar of frame in main machine and screw to handle 13 by removing one of the handle retaining screws.

5. Place sleeve 8 into hole in lead castle 6 and place a spacer (eg, wooden block) under it so that the hole for loading source is visable. Load the source using ypur own manipulator with side that is not nurled f acing aperture in cylinder.

Screw holding screw 14 usi g tool 21 into cylinder ( make sure not to apply to muc pressure to source).

6. take tool 21 and place it through hook on top of cylinder. Hold firmly and lif t cylinder slightly, in order to be able to remove wooden block. Lower cylinder gently and completely into sleeve.
7. Remove hook. Replace screw in handle.
8. Screw sleeve' 8 to lead making sure to use washers with a flat machined in the fror two holes.

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9. Mount micro switch bracket to plate 8. Adjust the micro switch so that when handle is turned against the nylon stop the switch is activated.
10. Place lead cap 20 on top of handle.

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ffhff ~ i 5. SERVICE _ The system is controlled is controlled by kicro processor controller which drives two stepper drives, motors and two DC motors. The posiition of all light barriers, limit switches and motors are indicated in rig. 1 CHECKS In order to check the operation of all light barriers and limit switches, siaply remove the two motor drives and the five relays in the machine. (Note: these are not in the electronic console. ) Note: The SD 2 drives are not interchangeable). Switch the instrument on and operate the limit switches manually, watching to see if the respective L.E.D. on the micro processor controller turns on and of f; To test the light barriers simply interupt the beam and watch the respective L.E.D. on the micro processor controller. If switching does not occur replace the component. FAULTS s a) No power Check main fuse at rear on electronic console, 3.15A. b! No LCD Display or lamps, a light on "on/off", " start" and "stopa buttons but micro processor controller is powered:

1) check fuses in SD 2 etepper motor drive module.
2) check fuse in display module 1090 on' PCB in slot behind front panel. Remove front panel of module to locate fuse.
3) change " transformer" module 1069 or "SD 2 stepper motor drive".

c) No drive to a stepper motor This can be checked by manually checking to see if a stepper motor is not powere (will rotate freely with no power locked in position) Fault

1) no drive to one stepper motor only.

a) check fuses in respective stepper motor drive b) change drive or motor

2) no drive to two stepper motors a) check mains fuse b) replace transformer module d) No drive to DC motor a) check respective relays located in main machine b) check fuse 6,3A behind display module 1090. Remove front panel of module to locate fuse.

e) Magazine does not feed outtof rack

1) feed motor turns but does not engage gear on magazine - check solenoid and solenoid relay.
2) check fuse behind display module 1090, fuse 6,3A.

6. e) Magazine feeds in and first dosimeter is pushed in front of source for irradiat but does not continue.

) replace timer t

Dbl 3UMEUI With no power to instrument. Dr.ly necessary when replacing a limit switch. ? ) Door limit switch set switch in position that the door latch operates the limit switch.

2) Scarce limit switch Mount handle on lead castle so that source handle operates this switch
3) Up and down limit switches Mount so that rack operates these switches in the fully up and down positions.
4) Dosimeter down limit switch Manually set this limit switch to a position where the magazine can move under the lead castle without hooking the dosimeter arm.
5) Dosimeter ut limit switch Place a dosimeter in a magazine and manuelly push the dosimeter out of the magazine up infront of the source. Set the limit switch so that it is operated before the arm has completely reached the end of its travel. This can be monitored by the brass rod protruding from;the lead castle. Set switch operation 1 1 mm from full travel With power to instrument. Only necessary when replacing a light barrier.

Make sure that the: transmitter and receiver look at each other. This can be seen by monitoring the L.E.D. in the receiver unit. Position the transmitter so that the receiver L.E.D. lights with no obstical in the light path.

1) Magazine back light barrier Remove the feed motor drive and solenoid relay mounted on the feed motor plate Take a magazine and move it manually until it just moves into the light barrie path (ae. LED just goes off) make sure that the front of the magazine clears t upper loading plate.
2) Rack light barrier Remove the rack motor drive. Manually turn the rack to the fully up position.

Place a magazine into the lowest rack position and turn the rack down until one can manually feed the magazine througn to the lead castle magazine slide. j When these are level move the light barrier until it just switches on when j

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3) Dosimeter light barrier Remove dosimeter and magazine stepper motor drive. Set the receiver so that when pushing a magazine with dosimeters through under the lead castle the dosimeter turns the light barrier on and of f.
4) Macarina Linht Barrier Remove the rack stepper motor drive. This is a reflective type. Make sure the door on the rack is closed. Turn the rack manually from top to bottom making sure the L.E.D. comes on bef ore the rack light barriers L.E.D.

in all cases and also that they are in coincidence when the correct rack position. S) Pront of magazine detect light barrior When rack is pushed in check that LED switches. ('

6) Magazine advance ' light barrier Remove the dosimeter motor relays and magazine stepper motor drive. Push a magazine with dosimeters under the laed castle. Turn the magazine motor in an anti clockwise direction until the LED of the light barrier just comes on.

Check that the dosimeter arm can be pushed up through the magazine. Rotate the disc containing the sixteen holes until this can be accomplished. Then lock disc to stopper motor shaft.

7) Solenoid only when replacing solenoid. Adjust sof t iron bar of solenoid so that when ful in "in" position the feed motor gear meshes with magazine teeth without applyir excessive pressure to magazine.
8) When replacing magazine motor Switch off the instrument. Push a rack through under the lead castle. Hevo the motor mounting forward until the motor gear meshes with the magazine's gear tee th.

Tighten the holding screws lightly. Feed a magazine in until it just touches tl gear and make sure that the dosimeters arm is able to move freely through the magazine's. tock the motors in position.

l MfCRO PROCEEKon INPUTS 0 START 1 RACK UP LIMIT SWITCH 2 RACK DOWN LIMIT SWITCH 3 MAG LIGilf BARRIER 4 FRONT MAG LIGHT BARRIER 5 DOSIMETER LIGHT BARRIER 6 DOSIMETER UP LIMIT SWITCH 7 DOSIMETER DOWN LIMIT SWITCH 8 MAG ADVANCE LIGHT BARRIER 9 SOURCE LIMIT SWITCH 10 RACK LIGHT BARRIER 11 2ACK MAG LIGift BARRIER 24 STOP 25 POWER FAIL CONTACT 26 DOOR I.IMIT SWITCH 27 TIMER CONTACT GUTPUTS 12 DIRECTION RACK MOTOR 13 SLOW RACK MOTOR 14 DIRECTION MAG MOTOR 15 SLOW MAG MCrroR-16 DIRECTION DOSIMETER MOTOR 17 SLOW DOSIMETER MOTOR 18 SLOW FEED MOTOR (SOLENOID) 19 DIRECTION TEED MCyrOR 20 POWER FAIL 21 DOUBLE RACK 22 BUZZER 23 TIMER

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12. i SD2 and SD3 STEPPER DRIVES 4 Edge Connections 2a Motor phase 2A 2c Motor phase 2A 4a Motor phase 2B 4c Motor phase 2B 6a Motor phase 1B 6c Motor phase 1D Ba Motor phase 1A Sc Motor phase 1 A 10s +24v DC out 10e +24v DC out 12a Logic supply input 1 12c Motor supply input 1 14a Logic supply input 2 14c Motor supply input-2 16a Ov 16e Ov 18a Ov 18e Oy 20a rast input 20e Pault output 22a slow input 22c Zero phase output 24a Rate adjust common 24c slow rate adjust 1 26a rast Rate adjust 26c Direction input 28a Internal clock output 28c Clock input 30a sync (input or output) 30c Energise input 32a External reference input 32c signal Ov List of link functions Link 1 (insert) Sets the sync pin to an output, making the drive a " master". This link must be fitted when there is only one drive in the system. The chopper regulator produces Sv luS pulses on the sync output. Link 2 (do not insert) Sets the sync pin to an input, making the drive a "slavet All interconnected drives in a multi-axis system should have link 2 fitted except the master drive which should have link 1. i Link 3 (do not insert) rit this link so operate in the full-step mode. A standa stepper motor will produce 200 steps /rev with this link fitted, and 400 steps / rey without. The 400 step /rev mode is to be preferred in most applications, the elight tor $ loss being of fset by smoother operation at low speeds. Link 4 (insert) With this link fitted the drive will remain energised_without Q need to make an external cinnection from the " energise" input to Ov. Setting the motor current Nominal current Switch settings SD2 SD3 1 2 3 4 1A 1.5A on off off off

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s stsetARY DATA f Date July 31, 1987 Applicant Panasonic Industrial Company (distributor) Two Panasonic Way Secaucus, New Jersey 07094

Contact:

Mr. David Kataman Marketing Director (201) 348-5339 Device Type Self-shielded irradiator Model WE 2001 Series Other Companies Involved Williston Eliu (manufacturer) Schiefe Barte 11 D3414 Hardengsen West Germany Radioactive Source Model Designation Cesium-137, model X-38, f rom Amerahan ~ Radionuclide and Maximum Activity Each irradiator will be loaded with a double encapr.ulated source of cesium- -137. The activity will generally be approximately two curies per source with one source per irradiator. The maximum activity will be six curies per source. y 4,i.eak-Test Frequency Minimum of once every six months. Principal Use Code Code J, Camma Irradiator, Category I The device is proposed for use under the specific license of a user. Custom Device Not a custom device. _ Custom User Not a custom device. s_ l .t$'+#' 4 9 4 'dB- 'T%, k %

3 StP9tARY DESCRIPIION Written Description This device is used exclusively to irradiate Panasonic thermo-luminescent dosimeters (TLDs). An operator can load a maximum of 50 Panasonic TLDs in s magazine, and he can load a maximum of 10 magazines into the device. The magazines are stacked on an elevator that is in a separate chamber from the location of the cecium-137 source. A preset irradiation time is then entered into the device. The device automatically moves one TLD at a time near the cesium-137 source for irradiation. Guide tubes are large enough to permit the TLDs to be moved near the source, but they are small enough to prevent the operator from getting any part, le body, including fingers, near the source. When all of the TLDs have been (% irradiated, the operator removes the magazines from the elevator. The device is a cabinet that is approximately 125 cm wide, 90 cm tall, and 50 cm deep. The cabinet'is on casters but is too heavy to be consfdered portable. It is intended to be used in a fixed location. The cabinet is divided into two chambers. One chamber contains the elevator that can hold a maximum of 10 magazinen, and the other chamber s .Y contains the cesium-137 source. A *stikhead separates the two chambers. A hole in the bulkhead is slightly Inrger than the cross-sectional dimensions of a magazine (about 7 cm by 3 cm) to permit the movement of one magazine at a timo from the elevator chamber to the irradiation chamber. Access doors to the two chambers are keyed separately. An operator must open and close the access door to the elevator chamber each time TLDs are loaded and unloaded, but there is nu reason for the operator to unlock .(j the door to the irradiation chamber during routine use of the irradiator. I 9 w =., %.,g a s m

l!. 3 The source housing does not move during use. Instead, three stepping motors are used: one motor moves the elevator up and down, one motor moves a magazine in and out of the irradiation chamber, and one motor moves a TLD in and out of the magazine for irradiation. The cesium-137 source is installed in a lead shield by a Panasonic service' person. The shield is bolted together and is disassembled only by an authorized service person. The shield is a right circular cylinder that is 16 cm in diameter and 20 cm high. Drawing The Appendicies A, B, and C to this document contain information supplied by the manufacturer. Drawings and photographs of the device are included. DETAILS OF CONSTRUCTION AND USE Conditions of Use ~ The purpose of this device is to irradiate Panasonic TLDs to gamma rays from cesium-137. Since the device will only accommodate special magazines that contain Panasonic TLDs, it is not possibic to use the device to A . irradiate other brands of TLDs, or to irradiate anything other than Penasonic TLDs. The environmental conditions in which the device will be used are expected to be typical of those found in a TLD processing laboratory. It la expected that the laboratory air will be cool, clean, and at low humidity. No excessive vibrations or other environmental stresses are anticipated. The devices will be used by processors of personnel dosimetry that use (l Panasonic TLDs. These processors are primarily nuclear power plants. Other Ii

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4 users might include commercial suppliers of personnel dosimetry, DOE facilities, and primary dosimetry groups of the military. The device will probably be used on a frequent basis by any of a few technicians at a dosimetry facility. The primary use of the device is to irradiate Panasonic TLDs to produce an element correction factor (ECF) for each element of each dosimeter. These ECFs are generally re-evaluated by a processor on an annual basis. The technician will load and unload magazines in the elevator compartment but will not open the itradiator compartment. The expected useful life of the device is essentially the same as the life of a Panasonic TLD system at a given dosimetry facility. The long half life (30 years) of cesium-137 means that the source should never be replaced once it is installed. Use of the device by a facility that processes Panasonic TLDs will probably be an integral part of their dosimetry program. ( ~ -Details of Constructio3 Appendix B contains drawings of the device. The cabinet and all mechanical and electrical parts (except for the cesium-137 source) are manufactured and assembled by Williston Elin and shipped to Panasonic..A. i processor of Panasonic TLDs will order the device from Panasonic, and the processor will order a cesium-137 source from Amersham. The source will be loaded by a Panasonic service' person into the source cylinder shown in page B.2 at the dosimetry processor's facility (see Installation below). The source cylinder is then secured in the lead shield in the irradiation chamber of the cabinet as shown on page A.9. The source is fixed in the source cylinder so that it is always irradiating the TLD frradiation position shown on page A.9. The irradiation ( position can be reached only by a TLD that has been moved into place by .j

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5 i i three stepping motors. One stepping motor controls the elevator in one chamber of the cabinet, one motor moves a magazine of TLDs from the elevator into the irradiation chamber, and one motor moves a TLD from the magazine to the irradiation position. Thus, it is not possible for a person to get fingers or other parts of the body in the irradiation position. Figure.1 summarizes the mate that exists f rom the elevator chamber of the cabinet to the irradiation position. Labeling A labil Will be attached to the outside of the cabinet. The label will contain the name of the manufacturer, the model number of the device, the serial number, the activity of cesium-137 for which the device is rated, the standard radiation symbol, and the words, " Caution - Radio-active Material." Testing of Prototypes The device is engineered ~to prevent the operator and the TLDs in the elevator from receiving more than 2.0 mR/h. The success of this enginetring goal is demonstrated below under Radiation Profiles. There are no moving parts associated with the radiation source. Three stepping motors are used A to move a TLD into the irradiation position. Failure of a stepping motor would not change the dose rate to the operator. Quality Control -[ After each device has been loaded with a cesium-137 source by a Panasonic service person, the service person will measure exposure retes in a method that is similar to the procedure described below under Radiation { Profiles. If sty location that is accessible to an operator la found to l i I .q ..s.. M he Q

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7 . produce an exposure rate of more than 2.0 mR/h, corrective action will be taken by Panasonic. Radiation Profiles, A prototype of the device,, located at the University of Michigan, was examined for exposure rates in and around the device. The results are shown in Figure 2. An Eberline R0-2 survey meter, serial no. 2315, was used to measure the exposure rates shown in Figure 2. This survey meter had been calibrated to cesium-137 within one month of being used to make the measurements shown in Figure 2. The prototype device at the University of Michigan was loaded with a 6 curie source of cesium-137-when the exposure rate measurements shown in Figure 2 were made. This is the maximum activity that will be used in the device. Generally, a 2 curie source will be used, and some licensees will use-less than 2 curies of cesium-137. Installation As discussed above, the device will be purchased from Panasonic by a X, licensee, but without the cesium-137 source. The source will be purchased _from Amersham by a licensee and shipped to the licensee in a DOT approved shipping container. A Panasonic service person will then come to the licensee's facility and transfer the cesium-137 source f rom the shipping container to the source cylinder shown on page B.2. The service person then .a secures the source cylinder in the lead shield located in the irradiation chamber of the cabinet as shown on page A.9. Finally, the service person will survey the cabinet as shown in Figure 2 to confirm and document that { the exposure rates in and around the cabinet are less than 2.0 mR/h. i 4 ~,w.,m$gNM s.

iu m

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9 v The operator of~the device has limited accessibility to the cesium-137 ~ source. _ The operator is able to unlock the door to the elevator chamber to load and unload magazines of_Panasonic TLDs. The operator will not-need th*t key to the irradiation chsaber to operate the device. Radiological Safety Instructions The primary radiological safety instructions for the device are incorporated in the Operating and Service Manual (Appendix A) and in the Operating Instructions Manual (Appendix C). Copies of these two ' enuals will be furnished to the licensee with the device. In addition to these two manuals, the licensee will be provided with a copy of the-exposure rates measured by Panasonic in and around the device at the time the cesium-137 source is loaded into the device. Panasonic will recommend to the licensee-that the device be leak tested at intervals not to excead 6 months. ( Documentation Accompanying the Device No documentation other than the Radiological Safety Instructions - described above, will be supplied by Panasonic to a licensee who-purchases a [. device. The licensee will obtain doeumentation concerning the cesium-137 ~ .c source free Ameqchar. Servicing When the cesium-137 source is installed in the device by a Panasonic service person, radiation profiles.will be made and a copy of the. radiation profiles will be left with the licensee. Panasonic will offer an optional service contract to the licensee to maintain and repair the electrical and ( mechanical components of the device. Panasonic will also offer to provide a . arm

10 + l-' L v repair service for the-device even if the licensee chooses not to have a service contract. In addition, Panasonic will offer to provide miscellaneou services such as source replacement and training of operators. Leak Testing Panasonic will recommend to the licensee that leak testing of the device be performed at intervals not to exceed 6 months. Safety Analysis The primary information that Panasonic will provide to the licensee pertaining to the safety of the device is discussed in the P.adiological Safety Instructions above. Panasonic will verify that the licensee.has a copy of the Operacing and Service Manual (Appendix A) and the Operating Instructions Manual (Appendix C). Panasonic will determine thr,t the device is operating correctly dnd safely at the time the cesium-137 source is loaded into the device. w 3*+ 6 + ~ 'e L s . ~.a.r. Ab i - d{ ~

4 APPENDIX A Operating and Service Manual for the WE 2001 Series TLD Irradiator. ( ( e .4.. k + P ,

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A.1 s 8e M I} ( 4-.- ) l y e' e' e e q ti .M (, ts. O . <C-i Q T WILLISTON C. ELIN f: -?{ 1.:...

/ t i Williston Elin TLD IRRADIATOR WE 2001 PC USER'S MANUAL Ver: 01/04/G9 AF-6PP

= - INDEX 1. GENERAL 1.1 Features 1.2_ System Configuration 2. SYSTEM SOFTWARE-2. 1 -- Making m_ Copy of_a Floppy-Disk 2.2 _ Menu System Operation and Keyboard 3. SYSTEM INSTALLATION 3.1 Password 3 3.2 Date 3.3 Time 3.4 -Printout of Data 3.5 Initialising-3.6 Starting and= Sequence Description 3.7 Stopping e 3.8 Self Check \\ 3.9-Error Messages it. ERROR HANDLING

5.
SYSTEM ERRORS 6.

DATA FILES 7. PRINTOUT OF-PRINTER 8. ASSEMBLY OF LEAD CASTLE AND LOADING OF SOURCE 9. SWIPE TEST

l :- I-INTRODUCTION 1) GENERAL 1.1 Features ~ The TLD-Irradiator can accomodate 10 magazines (racks) of-50 dosimeters. The Irradiation s.vt. ce is an Amersham Cs137 2Ci _Part:No. CDC-3322. Menu-Driven Friendly System. Controlled by two-microprocessor cards incorporated in the computer. All electronics-incorporated in the main housing of the Irradiator.- Source encapsulated in a minirnum oT' 4 inc.,es ofi lead. Irradiation of idosimeters done sequentially and-fully automatically Not all slots or positions have to contain dosimeters. Irradiation tirnes can be set f or individual dosimeters. 4 1 '. 2 SYSTEM CONFIGURATION ACER 915 COMPUTER = MS DOS Operating System. Central Unit with 512k RAM Memory. Parallel Output for printer. Black and. White Monitor. '1.2 Mb Floppy. Keyboard. Optional 80 Column Printer. PAGE ONE

s. 8 2)- SYSTEMz SOFTWAl-d.1. MAKING A COPY OF ALFLOPPY_. DISK The copy 1 command f or making a back-up will not work. In - order t_o ranke a copy of the_ Diskette enter: DISKCOPY a: m: Thim should be done immediately when receiving your system and the-original Disk stored in a safe place. -2.2 MENU SYSTEM: OPERATION AND KEYBOARD The Menu System represents most-attractive features. Each operation f unction to be perf ormed - requires a selection of parameters to define the function. The computer can be used to run ot her sof tware when the Irradiator is not in use, 1 j Note:' When jumping out of the Irradiator sof tware - the computer will turn the Irradiator "off". 3) SYSTEM INSTALLATION The -lef t side of the Irradiator has f our outlets. The mains input is marked " mains" and shouldLbe plugged into j .the wa11' socket. Connect'the outlet " Computer Mains" to the computer power and_both the " Stepper.PCB" cable and " Digital I/O" cable to the respective connectors at the rear of the computer. -Note: Nake-sure not to connect these cables wrongly. Place the floppy disk into the drive, close'_the drive door and switch-_the-computer on. The Irradiator. Program will load itself. The m'essage " Loading-Irradiator Softwere Ctr1AltDel BOOT STATUS : DEACTIVATED" and the screen with the following loco will be displayed "UILLISTON ELIN" Ver: 01/04/89 AF y - " TLD IRRADIATOR UE 2001 PC" PAGE TWO

l ' 4 l 3.1 PASSWDRD At the prornpt " Enter Pass Word" type in "Williston" and press:" Enter". This has been added for extra security. If. an error is reade while typing the password the cursor will return in order to give the user another chance. After 1ive tries, the words " Incorrect Password, Access Denied" appear on the { screen and the program is exited, i The message Ctr1AltDel-BGOT STATUS : RE-ACTIVATED appears-i and to re-enter f rom this point type " start" and press " enter". 3.2 DATE .j At the prompt "The current system date is 01-11-89 4 Is this correct Y/N" If this is correc t type "Y" f or Yes. If not type "N" for No and at the prompt i " Enter correct date" Type in the new date in Month-Day-Year format, year being only eg. "89". 1 .I 3.3 TIME At the prompt "The current system date is 01-11-89 The current system time is 11:40:45 Is this correct Y/N" If this is correc t type -"Y" f or Yes. If not type "N" for No and type in the time in the time Hours: Minutes. Note: We have O to 24 hours. Type the time 1 minute ahead. PAGE THREE l

The prompt "The current system date is 01-11-89 Enter correct. time 11: 44 Press any key to set the time" appears and on the minute pressing any key will start the seconds rolling.

3. 4 PRINTOUT OF DATA At the prornpt "Do you want a printout of Data Y/N" If you have a printer type "Y" for Yes and the following message is displayed

" Set Paper in Printer to Top of Page Press and Key to Start" If one types "Y" and has no printer or it is not switched on, or out of paper a time out will occur and the following message is displayed "The printer is 1aulty or out of paper Correct 1ault and press any key to continue or press D t o Disable printer" Either press O to disable printer or correct f ault. 3.S INITIALISING On completion of the above the Irradiator will. initialir.,e itself by clearing the racks which have been in the Irradiation Tunnel and then move the rack to the loading position. At this time the following messages appear "Initialising System" " Clearing Rack" and " Moving Rack to Loading / Unloading Position". ~ Note: The racks can only be loaded or unloaded in this position as the gate will only open when i '.7 position. I PAGE FOUR

m 9 - 4 l When reachingithis position one of the following sc'reens appear a) The Irradiation Sequence Has Been Aborted AT . Position X b Rack X Slot X Dosimeter-X -Press R to Resume Irradiation, I to Initialise or E to Exit b) Rack Now in Loading Position Last File Used Tii3T Saved on 01 89 at 12: 46: 13 i Do you wish to: -Exit program: Use LAST. Irradiation-Data Enter NEW Data Use PREVIDUS Irradiation Data 1 View' current list of Irradiation Files - Selett E,L,N,P-'or V 1. If the Irradiation cycle previously r_un had been fully completed then the program would imrnediately go to menu (b). 4 Let us look at the case of (a). Three' choices are allowed. By typing "R" f or Resurne the program looks at the dat'a, being positions rack, slot and dositneter and will resumo at the next dosimeter where it last aborted its irradiation sequence. " Position"_ indicates the position of the rack. " Rack" indicates the physical number of racks. " Slot" indicates the slot number in the rach. " Dosimeter" indicates the total number of cosimeters i already irradiated. PAGE FIVE

'i 1: The inessage "Advanc'ing to-next. dosimeter" This Lwould applyfif there-wasia power f ailure, an error during irradiation or stopping f rom keyboard. (Typing "I" for Ini tializa moves to the-next sc reen and - allows _the-irradiation-sequence _to be i ni ti al i zed.- Typing "E" exits the program'to DDS. 1 Menu (b). Here>there are five choices. Typing "E" exits to DOS. Typing "L" for Last uses Irradiation Data which was last entered. This-is-the file displayed on screen. -Aslin: this case-the file'name is Test Entered on 01-10-89 at-12:46:13. If - the alast f ile cannot be f ound - the-coror nessage. " Unable to find last data file" appears. Typing "P" for Previous will bring up the promp't " Enter Name of Irradiation File" Type in the name of file ~to be re-used and it will be read.from Disk, If the file asked f or.is not on disk the message )- " File not found" is displayed-and the user can make another choice. Typing."N":for New. .This-gives the opportunityEtc enter new data. The-f ollowing :nessage is displayed " Enter number of racks'.to irradiate" Here type the - total-nurnber to irradiate which is only a number.from 1Jto 10. The program asks if this is correct. Typing."Y" for Yes moves on and "N" for No allows a change. PAGE SIX

3, 4 l The prograrn moves on and asks " Enter Dosirneter Irradiation Data Rack 1 Dosimeter 1 to Here any number from 1 to 50 is only accepted. If Data f or only one dosirneter is wanted, press enter, if-more-than one are to have the sarne data enter the number, eg. 1 to 35, then the following appears. (Note:-This nurnber rnust be incremented to 50 even if-the rack is not f ull of dosirneters. ) " Enter Dosimeter Irradiation Data Rack 1 Dositneter 1 Irradiatien tirne Seconds" The Irradiation tirne can be f rorn a minimurn of 1.0 seconds to 999.9 seconds in 0,1 second intervals. Note: If an Irradiation time of less than 1.0 seconds is entered the computer will beep, the time will flash and be changed to 1.0 seconds. At the end of each rack of data entered the prornpt "Is this correct" appears. Type "Y" rnoves on and "N" allows'a change. One is then asked " Enter elle Narne" This can be a maximum of 8 alpha or numeric characters and press " Enter". ) Typing "V" for view will display all the previous -Irradiation ffles saved on disk. Prescing any key returns to the toenu.

3. 6 STARTING AND SEQUENCE DESCRIPTION The messaga

" Press any Key to Start" starts the Irradiation Cycle. PAGE SEVEN

The rack will now rnove downwards wi th the f ollowing rnessage appearing " Moving Rack to First Occupied Position" When the first rack is found the Feed Motor will advance the rack to the Irradiation position, where the data for that dosimeter is read f rorn t.he file and then the dosimeter is pushed to the Irradiation aperture in the lead castle and Irraciated for the entered tirne. While this is hapoening on screen the following mrasage appears " Position X Rack X Slot X Irradiating Dosimeter X for XX.X Seconds Iradiation Time XX Seconds" This is an indicator f or the operator of where the Irradiator is in its sequence. The last line " Irradiation Time" is a clock which is incremented to show the elapsed time of a single Irradiation. When a rack i ts completed the following message appears ' Clearing Rack Moving to Next Rack" After 10 positions have been completed the rack will move to the loading /unloadir.g position and the bu==er will sound continuously. The rnessage " Irradiation Cyc le Cornpleted" and prompt appears "Do You Want to Exit Program Y/N" Answering "Y" f or Yes exits the prograrn to DOS. "N" for No will take the operator back to the top of the progr arn. l i I l PAGE EIGHT

v. s He 3.7: STOP-

- ToLstop the'Irradiator at any ti'me type. capital "S" and. the f ollowing nessage -is-displayed "Irradiator Stopped:1 rom Keyboard Fatal Error,-Program: ABORTED. Press any. Key to Acknowledge Fault" The buzzer.-will sound. On pressing any key.the! buzzer is silenced and.the-following= message'is displayed i .) " Fatal. Error, Program-ABLi<TED - Press any Key to Shut Down.Irradiator To Resume Irradiation Prior to ABORT, Restart Program Note: All; Irradiation Data has been saved prior to ABORT" i After shutting down the_Irradiator the-program exits to-DOS. 3.8 SELF CHECK ' The Sof tware has been-designed to self test:.the Irradiator

for operation.at the beginning of the program.

Messages arefdisplayed asking the. operator to-correct certain condit. ions before starting. 23.8.1 " Power to Irradiator Disabled" The computer" checks that,the-power actually; exists at the-Irradiator.- 3.8.2 "Please Move Source-to the-Irradiate Position" " Press Any Key to Continue" The' Source Handle must be~in position and activate-the limit switch for irradiation _to be possible. 1This-ensures that the source is looking direc tly at the dosimeter, Move the source into position-and press'any key-. PAGE NINE

1 i -, -_s

3. 8. 3 - "Pl ease Close ther - I rra.di at.or - Door" This is a saf ety ac tivated_ by-the - litait-' switch-at -

the base-of the door. - All-: rnotc+s are stopped when the-door is openedLto ensure the operators safety. 3.9 ERROR MESSAGE The Sof tware has been designed to self test the -Irradiator, 'while-in_ operation. If_an error occurs during operation the Irradiator will stop-and the 1oilowing._ message is~ displayed. " x x x-x:x x x x x x" Fatal Error, Frogram ABORTED Press'any Key to Acknowledge Fault The buzzer wil10 sound.

This will be stopped by acknowledging _f mul_t.

The'next message is' displayed " Fatal Error Program ABORTED Press any' Key to Shut-Down Irradiator To-Resume Irradiation Prior to ABORT, Restart Prograra _ Note: All_ Irradiation Data Has Been Saved Prior to ABORT" Shut down the-Irradiator and clear the fault. j To restart -the program type " Start" 3.9;1 ' DOOR-On the screen the error-is displayed -l " Door Opened During It radiation" a _This indicates-that the door t.o the Irradiator was opened'during Irradiation. This..is not-an error, but a-- stop is rnade - to ensure saf ety of the ope r aitor. One can resurne where the last dosimeter irradiated was cornpleted. 'PAGE TEN

,zt. 3.9.-2-- ERROR AND RESUME This e.ppears if on - resuraing -the last? rack-has been removed by the operator,, The following messa.ge is displayed " Racks Have Been Rernoved. Cannot Resume" 4)'. ERROR HANDLING If any of the f ollowing messages appear: and cannot be - cleared service-is neccessary: "Back of Magazine Light Barrier Faulty"' " Dosimeter Light Barrier Faulty" " Dosimeter Up Limit Switch Faulty" " Front cf Magazine-Light Barrier Faulty" " Magazine Light Barrier Faulty" " Rack-Down Limi t Swi tch Faul ty" " Rack Light Barrier Faulty" " Magazine Returned Light Barrier' Faulty" "Dositneter-Light Barrier Faulty" 5) SYSTEM ERRORS When thes messages are displayed 5.1- "The Disk being written to is f aulty" Change'the Floppy Disk.

5. 2 "The Disk drive door is open" Close door by moving lever downwards.

5.3 "The Disk being written to, is write protected" Remove write protect sticker.

5. 4 "Uns.ble to find data file" Thr-data requested is not. on f ile.

Either insert disk with file or type correct data file name. PAGE ELEVEN

6)' DATA FILES -The: Data-Files c reated f or irradiating desirneters are stored with the Suffix .IRR These can be viewed by exiting the program to DOS and typing Dir a:/w or by using-the View mode in the I rrediator isof tware. ~ This lists all the files 'I' If one wants-to delet e a f ile type Del xxx.IRR where xxx is the file name, To delet.e all previous. data files type Det *.IRR .s. 9 PAGE TUELVE

W 1 1 1 1 es t.o n Elin TLD-IRRADIATOR WE 2001 PC a Irradiation-Input Data Data Entered on 01-11-89 at 10:37:39 Nuri.ber of Racks to Irradiate = 3 Data for Rack 1 s Dosirneter i T1rne 10.5 Seconds Dom a rneter 2 to Dositneter 10 Time 25.O Seconds Dositneter -11 to Dosimeter 21 Time 5.2 Seconds Dosimeter 22 to Dosirneter 42 Time 19.~0 Seconds Dosimeter 43 to Dosirneter 50 Time 23.5 Seconds Data fo; Rack 2 Dosirneter 1 to Dosirneter 7 Time '4.O Soconds-Dosimeter 8 to-Dosimeter 23 Time 33.1 Seconds Dosirneter 24 Tirne 17.1 Seconds Dosimeter 25 to Dosimeter 46 Time 7.2 Seconds Dositneter 47 Time 3.O Seconds Dosimeter 48 to Dosimeter 50 Tirne 3.2 Seconds . Data for Rack 3 Dosimeter 1 to Dosirneter 50 Tirne 4.5 Seconds Data Save as TESTING PAGE THIRTEEN

Dat;c Filo Nam 3CTESTING i: %Irrodiation Porf ormsd. on '01-11-89 at 10140130 I_ Data for Rack 1 -z Dositneteri 1 Din Slot-1 -Irradiated f or -10.5-Seconds Des i rne te r - 2 in Slot 4 Irradiated for 25.O Seconds-Dosimeter - 3 in Slot 13-Irradiated-for 5.2 Seconds Dosimeter - 4 in Slot.16-Irradiated for. 5.2 Seconds-t- -Dosimeter-5 ~in Slot: 25. Irradiated for 19.0 Seconds-Dos i rneter - 6 in Slot'32 Irradiated for 19.0; Seconds. L Dosirneter 7-in Slot-33 Irradiated 1or =19.O Seconds Dosimeter 8 in Slot 44 Irradiated for-23.5 Seconds Dosirneter 9 in Slot 50 Irradiated.for 23.5 Seconds 's Data for_ Rack 2 Dosimeter 10 in Slot 1 ' Irradiated f or 4.0 Seconds-Dosimeter' - 11 in Slot -2 Irradiated for 4.O Seconds Dosimeter 12 in Slot 3 Irradiated for- -4.O Seconds-Dosimeter-13'in Slot 18 Irradiated for 33.1-Seconds Dosimeter 14 in Slot 24 Irradiated for-17.1 Seconds. Dosirneter 15 in Slot 29 Irradiated for 7.2 Seconds Dosimeter 16 in Slot 46 . Irradiated for 7.2 Seconds Dositneter .17-in Slot 47 Irradiated for1 3.O Seconds-Dosimeter 18 in Slot 49 Irradiated =for 3.2' Seconds i Data for Rack 3 ' Dosimeter 19 in Slot 1 Irradiated f or 4.5 Seconds Dosimeter 20-in Slot 17-Irradiated for 4.5 Seconds-Dosirnet er 21 in Slot 36 Irradiated for 4.5 Second,s-Dosimeter 22--in Slot 50 Irradiated for 4,5 Seconds 6 PAGE FOURTEEN

i ASSEMBLY OF LEAD CASTLE AND LOADING OF SOURCE 1. Rornove the lid of the irradiator and.the steel plate seperating the lead castle from the rack. Leave the angle brackets so as not to have to se.t after loading of lead. 2. Locate no. 5 on the lead castle assembly drawing, (groves rnachined at base of lead). To load, rnove block carefully forward towards the dositneter push-up assiernbly (alu:ninium bridge no. 19 containing brasc, rnoveable push-up rod) until it just seats. Push Grnrn bolts through the holes in lead block. 3. Locate lead block no. 4 (block has groves inachined at lower end). Move this block gently into position with flat end tee rds i dosirneter push-up assembly 19. Make sure block locates on locating pins. Scccu the two Ic ser Ornre bolts with steel spacer 18 into lower lead ring at this st.ge. Load block 3,2 and 1 sequentially in the same r.anner. Screw 1 to lead block with Gmra bolts supplied. 4. Locate sleeve 8. Leave whole asserably rnounted as is. Remove nylon stop and turn hand so that source holding screw is visable. Remove 1 m loading rod 21 from frame of instrument. 5. Place sleeve 8 into hele in lead castle 6 and place a spacer (eg. wooden block) under it so that the hole for loading source is visable. Load the source using your own manipulator with side that is not nucled facing aperture in cylinder. Screw holding screw 14 using tool 21 into cylinder (rnake sure not to apply to much pressure to source). i 6. Take manipulator. Hold firmly and lif t cylinder slightly, in order to be able to remove wooden block, Lower cylinder gently and completely into sleeve. 7. Screw sleeve 8 to lead. 8. Mount rnicro switch bracket to plate 8. Adjust t'he micro switch so that when handle is turned against the nylon stop the switch is activated. 9. Place filter 25 containing 3mrn plexiglass into slot in lead castle. 10. Screw protecting cap 23 to steel plate 9 using Stum screws supplied. -11. Place lead cap 20 on top of handle. l

l. \\ x I o 3 e f f f f m-t + i /..\\ g s\\ f- .!!......... Q.. ~' A i nr g f. UL N t i I0 g m -... < (....... (. ) L g - @ Ij @e, o D.:...: ) 0 ~~ 9:...-- 5 a ~ 7 A 1 /. N. 9. sh i j; s .i /- M /nD &o M Got o os :. 4 g Ql Q V e - a 2 a 2 a s a 9 PAGE SIXTEEN

.s. 9)

SWIPE
TEST

.n 3 m 4 . h' L(SWIPE) 7 a - t, ,). 4 y IRRADIATION POSITION- = CESIUM 137 SOURCE ?- (SWIPE) 'j B S. W 'I ~ P E 12cm

  • - 10 c ra %

'7cm WIDE OPENING FOR RACK i (SWIPE) TUNNEL FOR MAGAZINE 3c en INSIDE y - TUNNEL y d: 13cro r (SWIPE) d Figure 1. Diagrarn showing the path froro the elevator c harnber to the irradiation position. PAGE SEVENTEEN .......}}

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