ML20134B550
| ML20134B550 | |
| Person / Time | |
|---|---|
| Site: | 07109036, 07109033, 07109032, 07106717, 07109160, 07109128, 07109126, 07109127 |
| Issue date: | 04/03/1985 |
| From: | Jeffery Griffin AFFILIATION NOT ASSIGNED, EXITSLI, TRI-STATE LABS, INC. |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 25612, NUDOCS 8508150665 | |
| Download: ML20134B550 (172) | |
Text
11 - 6 7/ 7 T
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g, P.O. Box 25578, 224 Co: me rc e S t.
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3 Apri1 1985 Director Nuclear Materials Safety & Safeguards U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Dear Sir:
Tri-State Labs. Inc. (Tx Lic.# 11-3802) would like to be registered, in accordance with 10 CFR 71.12(c)(3), as users of the followina devices.
Namo Model #
Cert. #
Package I.D. #
Gamma Inds.
6717-B 6717 USA /6717/B Camaa Inds.
100A 9127 USA /9127/B(U)
Gena Inds.
C-8 9128 USA /9128/B(U)
Gamma Inds.
50A 9126 USA /9126/B(U)
Gulf Nuclear 20VS & 40VS 9160 tlS A/9160/ B(U)
Source Prod. &
Equip. Co.
C-1 9036 l'SA/9036/B Tech / Ops 660 9033 USA /9033/B(U)
Tech / Ops 650 9037 USA /9012/B(U)
If you need additional information ple.nc contact my of fice.
Respectfully yours.
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eAMMA INDUSTRIES A DMekm of Nuclear Systeme, Inc.
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RADIOUPAl'IlY SUPVI:V Ml:TCH MODEL 250n
P, SECTION I GENERAL A.
PURPOSE The Gmmna Industries Model 250B and 252B Survey Meters are designed to fill the needs and requirements of the industrial radiographer.
NRC regulations, size, weight, and reliability were primary considerations in the over-all design scheme, while low cost and serviceability were maintained to ensure a practical product for the radiography industry.
This effective, yet low cost design, makes the instruments suitable for a variety of applications including nuclear gauging, cobalt therapy, nuclear medicine and education.
Elimination of the pos-sibility of reversal in high radiation fields, enhances the versatili ty of the instruments, particularly in large j
source radiography applications and cobalt therapy.
l B.
DESCRIPTION The 250B and 252B instruments are amall, lightweight, l
rugged ge,i,ger counters.
Power to the meters is provided l
by two D
cells (standard flashlight batteries), which operate from a range of 3.17 volts to 2.76 at 10ma to 3.5ma, resulting in extended battery life.
Measurements are displayed on a rugged meter movement, with linear l
scale marked 0-10 mR/hr.
A selector switch provides l
ranges of 0-10 mR/hr(X1), 0-100 mR/hr(X10), 0-1000 mR/hr (X100).
The meters are equipped with three adjustments for accurate calibration on each range.
Both models meet the minimum range requirement of 2 mR to 1 R/hr for industrial radiography (10 CFR 34.24) required by NRC and/or agreemen states.
The 252B is equipped with a built in dosimeter charger.
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SPECIFICATIONS 1.
Detector a.
Fill Can: NE + Halogen (Co-60) 1450 CPM Q 3 mR/hr b.
Sensitivity 50 microseconds Dead Time:
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Housing:
446 SS c.
Operatin6 Voltage:
600 volts 2.
Meter n.
Typei 0-100 microamp DC meter b.
Enclonure Lexan c.
Scale: 0-10 mR/hr c
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Weight:
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Dimensions:
Length -
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Height -
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Width - 3.25", 8.25 cm.
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Case:
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Fiberglass impregnated polyester 2)
Cover sealed with inlay rubber sponge cord 4
Battery Life Over 500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> of continuous usuage with alkaline a.
cells b.
Varies according to type of batteries used, operating j
temperature and age of batteries f
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252B Model a.
Built in dosimeter charger l
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SECTION II OPERATION A.
PREPARATION FOR USE 1.
Inspection:
The instrument should be checked for physical damage.
Open case, make visual inspection, ensure that batteries are securely in place.
B.
OPERATING THE INSTRUMENT 1.
Starting:
Turn switch to battery check (circuit check) position.
The meter should indicate above the check position (to the right).
Allow 10-30 seconds for energy to travel through circuits.
2.
Select the desired range, use a check source to ensure in-strument is operating, if available.
C.
READING SCALES The scales are marked 0-10 mr/hr with a multiplier as selected by the selector switch.
Simply read the measurement indicated on the linear scale and multiply by selected number.
The geiger tube is mounted at the extreme front centerline of the meter.
For most accurate results, hold the instrument level and perpendicular to the source of radiation.
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FIGURE 3.
OPERATING CONTROLS
SECTION III THEORY OF OPERATION A.
HIGH VOLTAGE POWER SUPPLY To provide the H.
V. desired to power the geiger tube, a blocking oscillator DC-DC Converter was selected.
When power is applied to this circuit, the bias on 0 is estab-1 Initially the collector current of Q1 lished through R2 creating a magnetic flux.
passes through the primary of Ty This increasing flux induces a voltage in the low voltage l
secondary of the transformer.
Resistor R1 and C2 establish a phase shif ting network to increase base current in Oy.
This action is regenerative causing a rapid increase in Oy collector current until saturation of T occurs.
With the characteristic square hysteresis curve bf this transformer, when saturation is reached, the low voltage secondary no and collector current longer provides the base current of Q1 decreases.
The decreasing flux in the low voltage winding drives.the base of Q, negative, forcing it into cutoff.
The decays i
transistor remains catoff until the voltage on C2 at which time the base current again through Ry and R3 increases.
The Sycle is repeated and a blocking oscillator is formed with a frequency of about 1000 H C1 ensures that the oscillator does not lock into hig5 frequency oscil-lation.
This effect induces a high voltage wave form into the high voltage secondary, this is rectified, filtered and trippled to provide the high voltage for operation.
Regula-tion of the high voltage is attained using a corona discharge VR tube.
This tube is conducting when the applied voltage I
reaches 600 v.
B.
COUNTING CIRCUIT ioni-As high energy particles pass through GM detector GMy, zation of the gas mixture within the tube occurs.
This causes a pulse of approximately 4 volts peak to peak to trigger the input (Pin 8) of monostable multivibrator U.
U converts 1
3 this stream of pulses from the GM tube into square wave pulses at its output (Pin 10).
These square wave pulses vary in length according to the time constant chosen by selector switch SB (R5 giving the shortest duration, R the longest).
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form an integrator which Resistors Rg, Rg, and capacitor Cg provide a linear analog reading across meter M1 Capacitor C7 acts as a bandpass to ensure linearity of the integrator for high scale readings of meter M1*
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SECTION IV MAINTENANCE A.
CALIBRATION When the survey meter is shipped from the factory, new batteries are installed and the instrument is calibrated.
The date of calibration is stamped on the calibration card and attached to the meter.
Barring any damage in shipment, the instrument is ready for use.
When the instrument requires re-calibration, turn the function selector to the X1 position and place the instru-ment in a known field of radiation, 3 mr/hr and 7 mr/hr and adjust the calibration control for the proper readings.
Clockwise rotation will increase the reading and counter-clockwise rotation will decrease the reading.
Once the instrument has been calibrated on the X1 scale repeat for the X10 scale and X100 scale with the instrument in a known field of radiation of 30 mr/hr and 70 mr/hr for X10 and 300 mr/hr and 700 mr/hr for X100.
The NRC requires that all survey meters be checked and calibrated every 90 days.
If it is found that H.V. is not at or near 600 V, install a milliamp meter in series with the battery line.
Turn selector switch to X1, X10, or X100, set current drain at 10mc DC.
This should be done with new batteries.
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CALIBRATION t
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Trouble Shooting
- Caution **
This meter employs CMOS circuitry.
Only Qualified servicevu,n should be allowed to trouble shoot.
To discharge high voitage, with switch off, connect jumper momentarily from negative side of battery to positive side of V2 (+600).
Do nce short directly across V2 as this will result in component damage.
SITUATION INDICATION SOLUTION 1.
Battery /CKT R.
Indication but A.
Replace Battery Check Shows Less than Full Scale B.
Slow response B.
H.V. Adj us t 30 Sec to Full Scale C.
No Response C.
- 1. Check Battery Connections
- 2. H.V. Adjust
- 3. V2
- 4. GM Tube
- 5. Meter, Movement
- 6. Switch 2.
Instrument A.
No Indication A.
Replace Switch S y operates on any range check but no all ranges B.
One or more G.
Check R -R -R 5
6 7
ranges operating and replace as required 3.
Instrument on A.
Erratic Indication A.
Check Tightness of any range Meter Lugs B.
Meter Reads Less B.
With Instrument off Than Zero adjust mechanical zero NOTE - -
l This instrument should be serviced by qualified personnel with proper tools and training.
Identical components must be used Ior replacement to insure proper operation.
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MODEL GS-2000 i
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i RADIOGRAPHIC SURVEY METER i
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sODEL GS 2000 WATERPROOF AND CUSTP.^.OOF
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SURVEY METER ENCLOSURE i
RUGGEDIZED TRIPLET METER INDICATOR CONFORMS TO MILITARY SPEC. NO. MIL M 10304.
NEOPRENE GASKET.
MONEL MOUNTING SCREWS CAPTIVATED IN COVER.
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ROTARY SHAFT SEAL MILITARY SPEC. NO. MIL 8 5423/0942
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NEOPRENE O RING FIBERGLASS REINFORCED POLYESTER RESIN V
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TECHNICAL DATA
. MODEL GS-2000..
The Model GS 2000 is a rugged, Waterproof and Dustproof Survey Meter i
for Field use in Industrial Radiography and Similar Applications. This Unit is SpeCifically Designed to insure Long Meter Life in all Types of j
i Environment.
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- FEATURES
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- A Rugged, Two Piece Fiberglass Reinforced Polyester Resin Case i
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- Large Mill. Spec. Ruggedized Meter Indicator j
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- Shock Mounted Geiger Tube i
- Fully Transistorized j
- Corrosion Resistant j
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- Regulated High and Low Voltages Insures Stable, Dependable Results i
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- SPECIFICATIONS
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j Ranges:
0-1000,0100,0-10 mrlhr.
i Precision:
Within 10% of Full Scale at Standard Temperature j
i Over Operating Range.
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Calibration:
Within 10% When Calibrated With Ceslum 137.
Radiation Detected:
Gamma and X. Ray i
i Environmental Effects:
Waterproof and Dustproof, i
i Temperature Limits 30' to + 50*C. Excluding Batteries.
i Detector:
Shock Mounted Halogen Quenched Geiger Mueller Tube.
j Elfective Length: 0.625 inches. Effective Diameter: 0.194 Inches j
i Wall Thickness: 30 mg/cm2, Energy Dependence:
Within 20% From 801500 kev.
Saturation:
In Excess of 1000 R/hr When Calibrated and Maintained Properly.
i Controls:
Five Position Rotary Switch: Of f, Battery Check, X 100, X 10, X 1.
Calibration Controls:
IndividualCalibration Potentiometers Are
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Provided For Each Range.
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ResponseTime:
90% of Final Reading Within 10 Seconds.
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Geotropism:
Within 2% of Full Scale in Any Orientation.
j Display:
3 inch Ruggedized Meter Indicator, i
j Battery Complement:
Two "D" Size Cells.
j Battery Life:
Over 150 Hours of Continuous Service. Non Alkaline, j
i Dimensions:
43/8 in. Wide x 73/4 in. Long x 6 in. High including Handle.
i Weight:
4 Pounds 2 Ounces including Batteries.
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Price F.O.B. Pasadena, Texas i
The Model GS 2000 Was Factory Tested Successfully Under Two Feet of Water.
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MODEL GS-1000A G. E. Smith & Associates Pasadena, Texas j
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. iR lY G.'E. Smith & Associates 919 H ER8ERT P AsADEN A. tex As 77506 e
h (7ta ers.2sas MODEL GS 1000 A SURVEY METER FOR FIELD OR LABORATORY USE FEATURES Simplicity Lightweight, Rugged, Two Piece Aluminum Case Construction Large 3%" Ruggedized Meter Indicator Battery Test Position, Internal Mounted Geiger Tube Reliability and Accuracy - Regulated High and Low Voltages Insures Stable, Dependable Results SPECIFICATIONS Ranges 01,000,0100. 010 mrihr Precision within 10% of full scale at standard temperature over operating range.
Calibration within 10% when calibrated with Cesium 137.
Radiation Detected Gamma and X Ray Environmental Ef fects Temperature Limits -30' to + 50*C Excluding Batteries.
Humidity Limits 0 99% non-condensing.
Detector Halogen Quenched Geiger Mueller Tube. Ef fective Length: 0.625 inches Effective Diameter: 0.194 inches. Wall Thickness: 30 mg/cm2 Energy Dependence Within 20% f rom 801,500 kev Controls Five Position Rotary Switch: Of f, Battery Check, X 100, X.10, and X 1.
Battery Complement Two "D" size cells Battery Life Over 150 hours0.00174 days <br />0.0417 hours <br />2.480159e-4 weeks <br />5.7075e-5 months <br /> of continuous service.
Dimensions 4'/. in. wide x 75/a in,long x 6 in. high, including handle Weight 3 pounds 9 ounces including batteries The GS 1000 A of fers an economical and rugged solution to health physics survey problems for gam-ma and x rays in Industrial redlography.
Price F.O.B. Pasadena. Texas
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(7isi 47s 2,as MODEL M 1000 A SURVEY METER FOR FIELD OR LABORATORY USE FEATURES Simplicity Can Be Worn on Belt, Hand Held, or Laid on Ground
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Lightweight, Rugged, Two Piece Aluminum Case Construction Ruggedized Meter Indicator, Built in Audio Speaker Battery Test Position, Internal Mounted Geiger Tube Reliability and Accuracy -- Regulated High and Low Voltages Insures Stable, Dependable Results SPECIFICATIONS Ranges 01,000,0100,010 mrthr Precision within 10% of full scale at standard temperature over operating range.
Calibration within 10% when calibrated with Cesium 137.
Radiation Detected Gamma and X Ray Environmental Effects Temperature limits -30* to + 50'C Excluding 8atteries.
Humidity Limits 0 99% non-condensing.
Detector Halogen Quenched Geiger Mueller Tube. Ef f active Length: 0.625 inches Elfective Diameter: 0.194 inches. Wall Thickness: 30 mg/cm8 Energy Dependence Within 20% from 801,500 kev Controls Five Position Rotary Switch: Of f, Battery Check, X 100, X 10, and X 1.
Battery Complement Two "C" size cells Battery Life Over 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> of continuous service.
Dimensions 4% in. wide x 4'hin,long x 2'/ In. high Weight 24 ounces including batteries Audio Built in Audio Tone Transducer The M 1000 A offers an economical and rugged solution to health physics survey problems for gam-ma and x rays in Industrial redlography, Price F.O.B. Pasadena, Texas
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(713) 475 2986 General Descripton The Model GS-1000A and M-1000A is a sensitive portable pulse count ratemeter and power supply, and will detect gamma and X-Ray radiation.
The instrument utilizes the latest design in solid state circuitry, and contains no vacuum tubes, resulting in a rug-ged, and reliable device.
This design allows the instrument to operate on only two "D" cells, and yet give a battery life of over 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> with continuous operation, and longer with intermittent use.
The instrument (GS-1000A) case utilizes an aluminum top and a drawn aluminum bottom, being waterproof, with two manually operated pull catches for closure.
Visual readout is provided by a rugged, millitary type, waterproof, 3 1/2 in, meter.
The case top also contains the operating control; the f unc t. ion switch has a battery check position and three range positions.
POWER SUPPLY The high voltage power supply is a blocking oscillator driven
" fly-back" type circuit.
The blocking oscillator portion of c li e circuit consists of transistor Q3, windings. 3-4 and 5-6 of trans-former TI, and resistor Rl7, and the batteries.
C8 serves only to l
suppress high frequency parasitic oscillation caused by the trans-istor parameters.
The high voltage power supply portion of the circuit consists of winding 1-2 of Tl, rectifier CR5, the associate resistors and capacitors, and Zeiner diodes Zl, Z2, and Z3.
The low voltage section is comprised of winding 5-6 of TI, diode CR4 and C7.
The operation of the power supply is as followa= When the instrument is turned on Q3 conducts and an increasing current flows through winding 3-4 and the collector of Q3.
This current induces a voltage in winding 5-6 of such polarity as to sustain and increase the conduction of Q3.
The collector current continues to
_ncrease until Q3 and winding 3-4 becomes constant.
When the current
r in uinding 3-4 becocos constant, tho induced voltage in winding 5-6 falls to zero which causes the base current to drop, which incurn, causes the current flowing through the collector and winding 3-4 to drop.
This decreasing current induces a voltage in winding 5-6 of such polarity as to turn off the transistor.
Insofar as this is a regenerative action the transistor turns off extremely fast, causing the flux in the transformer to collapse suddenly.
This latter is the fly-back action, which induces high voltage on all of the windings, the magnitude of the voltage being proportional to the number of turns on the winding.
The voltage induced on winding 1-2, which is extremely high owing to the large number of turns, is rectified by CR5 and filitered by C9 and Rl3, after which it is regulated to 600 volts by Zl,Z2, and Z3.
The regulating action of Zl, Z2, and Z3 is reflected back through the transformer, and thus the voltage induced at the other winding is also regulated.
This is taken advantage of at winding 5-6 1
)
where the induced voltage is rectified by CR4 and used to power the rest of the instrument.
The induced voltage at the base then returns i
to zero, allowing the transistor to conduct again and thus repeating the cycle, the rate of repetition beink controled by Rl7.
MONOSTABLE MULTIVIBRATOR The monostable multivibrator circuit consists of Q l, Q2, cali-bration Pots R3, R4, R5, C (range switch), and associated components.
Its function is to provide a uniform current pulse output for each pulse input, regardless of the shape or magnitude of the input pulse.
METER and TIME CONSTANT CIRCUIT The metering circuit consists of MI, the meter, R7 and C2 the intergating capacitor.
When a pulse causes QI to conduct, the collector current passes through the intergating capacitor leaving it charged.
It is then discharged through the meter causing it to deflect.
The amount of deflection is proportional to the amount of charge. which
(
l in turn, is proportional to the average current.
Thus the meter reads the average current through Qi, which is proportional to the pulse h
race and width.
The response time of the system is a function of the size of capacitor C2, the larger the capacitor the longer it takes to charge and discharge, and thus the response time can be altered by changing the amount of capacity in the circuit.
SELECTING RANGE ond TAKING READING Turn the instrument on, to the battery check position, and see that the meter reads in the indicated zone.
Now, turn the switch to the 1100 (0-1000 MR/HR) range and place the instrument in the location to be measured.
If the reading is less than 10% of full scale, rotate the switch to the XIO (0-100 MR/HR) range. If the reading is still less than 10% of full scale rotate to the XI (0-10 MR/HR) range or most sensitive range.
The meter reading should always be multipied by the range switch setting.
1 j
CALIBRATION The calibration source must constitute the sole source of radi-
)
otion when calibration is performed.
Calibration must not be under-taken when the background is above normal or when the instrument is j
in a radiation field other than that produced by the known calibrat-i ion source used.
There are three calibration potentiometers located at the rear l
l of the circuit board, from left to right, XI, X10, XIOO.
To calibrate place the instrument in a known radiation field for each a
of the three ranges and when necessary adjust the corresponding potentiometer.
DETECTOR The detector used in this instrument is a halogen quenched geiger cueller tube.
Effective length is 0.625 inches and the effective diameter is 0.194 inches.
The wall thickness of the tube is 30 cg/cm squared.
It will detect Camma and X-Ray radiation from 80-1,500 kev within 101.
MODEL M-1000A The Model M-1000A survey meter utilizes the same electronics 1
cnd detector tube as the Model CS-1000A.
The only difference between the two is the meter size, case design and the battery size.
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The meter is a ruggedised i 1/2 in. Large scale and the batteries used are "C" cells.
The battery life is shorter with the "C" cells.
The case is of two piece aluminum construction and has loops on the back for wearing on a belt.
The M-1000A also has a built-in audio i
speaker for aural monitoring.
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MODEL 6 GEIGER COUNTER l
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l DantoNxR AND MANUFACTCHRH or l
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I INSTRUMENTS l
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LUDLUM MEASUREMENTS, INC SWEETW ATER, TEX AS i
MODEL 6 Y
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GEIGER COUNTER V
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LUDLUM MODEL 6 GEIGER COUh"fER
.TADLE OP COICEICS Page !!o.
1.
GENERAL 2
2.
SPECIFICATIONS 2
3.
DESCRIFTION OF CONTROLS AND FUNCTIONS 2
4.
OPERATING PROCEDURES 3
5.
CALIBRATION 3
6.
MAINTENANCE 4
7.
BILLS OF MATERIALS AND SCilEMATICS 5
i I
i APRIL 1982
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a LUDLUM MODEL 6 GEIGER COUNTER 1.
GENERAL The Model 6 Geiger Coounter is a radiographic survey meter designed specifically for the utility monitor.
A cast housing features a compartment battery box that is accessible from the front panel.
A two-piece, gasket-scaled, cast-aluminum meter bezel insures long meter life in all types of environment.
2.
SPECIFICATIONS POliER:
two standard "D" size batteries THREE LINEAR RANGES:
from 0 to 1 R/Hr; meter scale presentation - O to 10 MR/Hr with rcnge multiples of X1, X10, X100 I
DETECTED RADIATION:
gamma; X-ray, if special precautions are used to avoid overexposure LINEARITY:
plus or minus 5% full scale CALIBRATION STABILITY:
less than 15% variance to battery end-po int HETER:
50 micro-cmp, 2 1/2-inch scale with pivot-and-jewel movement DETECTOR:
internally-mounted LND 714 tube SIZE:
3.4 x 3.5 x 7.0 inches (H x W x L exclusive of handle)
WEIGHT:
3 pounds 3.
DESCRIPTION OF CONTROLS AND FUNCFIONS Range Multiplier Switch is a 5-position switch marked OFF, BAT, X100, X10, XI.
Turning the range selector switch from OFF to BAT position provides the operator a battery check of the instrument.
A BAT check scale on the meter provides a visual means of checking the battery status.
Moving the range selector switch to one of the range multiplier positions (X1, X10, X100) provides the operator with an overall range of 0-lR/Hr.
Multiplying the scale reading by the multiplier determines the actual reading.
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l LUDLUM MODEL 6 GEIGER COUNTER Range Calibration Adjustments are recessed potentiometers located on line with each multiplier position.
These adjustment controls allow individual calibration for each range multiplier.
4.
OPERATISE PROCEDURES 4.1 Remove the battery lid and install two "D"
size batteries.
Note (+)
(-) marks on inside of the lid.
Match the battery polarity to these marks.
NOTE:
Center post of flashlight battery is positive.
Replace the battery lid.
4.2 Turn the instrument range switch to BAT.
The meter should deflect to the battery check portion of the meter scale.
If the meter does not r es po nd, recheck that the batteries have proper polarity.
4.3 Turn the range switch to X1.
Expose the instrument to a radiation check source.
The meter should respond.
4.4 Check calibration and proceed to use the instrument.
5.
CALIBRATION 5.1 For detector operating point, remove the instrument housing and adjust R3 (Drawing No. 206X5) for 550 volts.
Use a voltmeter with 100 megohm resistance, or greater.
NOTE:
If an electrostatic voltmeter is not available, use an ordinary volt-ohn-milliampmeter with an attenuator to provide at least 20,000 ohms-per-
-volt meter resistance.
Select the appropriate scale and then adjust the high voltage to read 550 volts.
Do not use a vacuum, tube-type voltmeter for this adjustment unless an external high voltage multiplier probe is used.
Replace the instrument housing.
5.2 Turn the instrument range multiplier switch to X100.
Expose the detector to a calibrated gamma field and adjust the respective range potentiometer for proper reading.
s I
i LUDLUM MODEL 6 GEIGER COUNTER i
I 5.3 Repeat the above procedure for the other scales, f
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6.
MAINTEMAECE NOTE:
NEVER STORE THE INSTRUMENT OVER 30 DAYS WITHOUT REMOVING BATTERIES.
ALTHOUGH THIS INSTRUMENT WILL l
OPERATE AT VERY HIGH A!!BIENT TEMPERATURES, BATTERY SEAL FAILURE CAN OCCUR AT TEllPERATURES AS LOW AS 100 i
DEGREES FAHRENHEIT.
NEGLECTED BATTERY SEAL FAILURE j
WILL SURELY CAUSE ONE AWFUL tlESS!
i Instrument maintenance consists of keeping the instrument clean and periodically checking batteries and calibration.
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Once initial calibration is perf ormed, recalibration should not be required if batteries are maintained in good j
condition.
An instrument operational check should be performed prior to i
each use by exposing detector to a known source and confirming proper reading on each scale, i
Under certain conditions, NRC requires instrument l
recalibration every three months.
Check the appropriate regulations to determine recalibration schedule.
Also at three month intervals, the batteries should be removed and the battery contacts cleaned of any corrosion.
I l
If the instrument has been exposed to very dusty or corrosive i
j atmosphere, more frequent battery servicing should be used.
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Use a s p a n r. e r wrench to unscrew the battery contact j
insulators, exposing internal contacts and battery spring.
j Removing the handle will facilitate access to these contacts.
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Portable Survey Meter
- for inddstrialrodtography Features
- Ruggedized metal construc-tion for roughest service
- Lightweight, human-engineered design for all day portability.
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BICRON specifications' l
Radiation Detected: Gommo and reading from -20'C to + 50*C Vibration: Sg in each of three X-roy.
using okohne batteries mutually orthogonal oxes of one or Operating Range: 0-10. 0100. ana Humidity less than 2 5% charge in mcce frequencies from 10 33H2 i
O-1.000 mR!h in inree knear ranges
'eod'ng trom 10% to 95% R H Construchon: Splash-proof. shock Accurocy:Witnin 15% of reoding Power Requirements: Scogle 9 vott proof. two-piece all metal case for mCs between 25% and 100 o conery Mallory MN'604 or equoi Scratch resistant laminated control of full scale on any ronge Ufe greater tnan 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> stan a-oonel and Becron Kleen-Krome' ora ono ao to 200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> witn trim on case tcp duronfe block Detector: I toko r. mr,
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Controls: Rn tq <,....w ur power r.o eanae functions located con Overall Dimensions: 4 25 x 8 x 6" j
Energy Dependence: 1 In, t k '"
. enierits under he noncle including hono:e(to 8 x 20 4 x 40 kev to i 2MeV ecora position.; are OFF BAT.
15 2 cm) i Wormup Time: f K,r.t 100 e 'C Xi Cohcr H posibons are PJet Weight: 2 2 lbs (i Lg }
OFF. BAT. riv x100 x10. x1 witn Exposure Rote Limitations %ttc gt,on s a rotorv ON-OFF switch ments t pico!ty reco ott ww ir'
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fields as higr. os 1000 f.rrcs & e i
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Response Time. vctm:ro tr.,r
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Operations Manual Bicron (brporation l
radiographerM Portable Survey it.er i
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Table of Contents Paragraph Title Page_
1.0 Ceneral Description 1
1.1 Specifications 1
2.0 Battery Installaticn 1
2.1 Battery Test 1
2.3 Rarliatim Measurements 1
2.4 Audio 1-2 3.0 Circuit Description 2
l 3.1 CN Tube 2
4.O calihration 2-3 11 1
r 1.0 General Description W
W e Bicron radiographer is a portable, self-contained surwy noter housed in a tw -pie splashproof nsal case. %e unit is ergonantically designed and balanced for easy portability. %e recesscd noter nownent is large and easy to read. We cperational control is designed for one hand operation. All catponents are ruggcxiized to withstand weather, shock and utpact for maxinum field reliability.
The er.?rgy conpensated GM detector is bard nounted for conwnienm.
Various cptions are available (see data sheet).
1.1 Specifications 1See data sheet) 2.0 ~ Battery Installation With the instriznent turned off, open the pull catches at each end of the case and renove the case bottm. 'Ittis will expose the circuit board a W ly and battery board. Install a 9-volt alkaline battery, Mallory M41604 Duracell or equal, in the battery retainer clip using caution to obserw proper polarity. %e second battery retainer clip is typically designed to store a spare Mttery. Orient the case bottcm with the sponge rubber pad under the battery, and replace the case bottcm.
2.1 Battery Test Turn the selector switch to the 'Mt. ' position. We noter should read within the 'Mt.CE' check band.
2.2 High Voltage Test (Option H)
If the unit is equipped with Option H, turn the selector switch to the
'HV' position. %e noter should read within the 'HV OK' check band.
his providas a neans of nonitoring the detector high voltage.
2.3 Radiation Measurenents To unke a radiation neasurenent turn the selector switch to one of the three linear rancy.s (X1, X10, X100). These ranges correspond to 10, 100, and 1000 milliroentgens per hour (mR/h) full scale.
137Cs gantna radiaticn.
S e meter scale is calthrated directly in mR/h for See the energy response curve (on data sheet) for typical response to other energies.
Caution:
An external source of ionizing radiation of the type the instrtunent was designed to measure nust be used to determine proper operation of this instnment.
2.4 hviin Men Option A is included, an audible alarm will sound Mwn the neter is approximately 30% or nore above full scale on any range. 'Ittia over-range x
alann can be defeated by turning off an internal cn-off switch located on the main circuit board.
When Option S is included, an internal speaker will produce an audible click for each detector pulse. his speaker is controlled by a panel mounted on-off switch labelled " audio".
0 t
When Option A and S are bath included, the omr-range alarm (Option A) will function only when the panel nounted " audio" control is in the off positicn, and the internal switch is on. When the " audio" control is in the on position, the omr-range alarm (Option A) is defeated.
3M circuit Description
'Ibe electronic circuitry in the Bicron radiographerW is contained on three interconnected printed circuit boards.
Madern solid-state integrated circuitry is used throughout. h mjor caponents are:
1.
High-wltage power supply. A feedback-regulated, electronically stabilized supply for the m tube potential. Optional circuitry provides IN reacbut cn the meter scale.
2.
Count-rate meter. A linear charge ptry ratenuter conwrts the m tube pulses to an exposure rate reading on the t alibrated neter scale. 'Ihe circuitry includes a unique dead-time capensation technique to provide linear response over the full range, autcnntic tine constant selection, anti-saturation, and tenperature capensation.
3.
Optional audio circuitry for individual pulse counting and overrange alarm.
3.1 m Tube
'Ibe m tube consists of a thin cylindrical shell which is the cathode, a fine wire anode suspended along the longitudinal axis of the shell, and an inert gas into which a cnnll anount of a M1 ogen gas is inserted to act as a quenching agent.
A potential of approxinntely 600 volts is nuintained between the two electrodes with the arode alwys positim. 'Ihis voltage is slightly less than that required to produce a discharge in the gas. When a nuclear particle or ray of sufficient energy enters the m tube, it ionizes a nolecule of the inert gas. Because of the high voltage maintained between the electrodes, the positive ions are attracted to the cathode and the electrons.a m attracted to the anode.
In their novenent toward the electrodes, these charged particles trigry_r the ionization of additional gas nelecules, resulting in an avalanche of icns ficwing between the electrodes. 'Ihe gas discharge thus created is similar to the gicw of a neon imp. 'Ibe tube conducts as icng as the gas is in the iertized state.
h small anount of halogen gas in the gas mixture quenches the flow of icms, stppressing further electztn avalanches tmtil arother nuclear particle or ray enters the tube. 'Ihis flowing and quenching results in a rapid pulse or surge of current in the external circuit. 'Ibe ntmber of pulses per minute is approximately proportional to the radiation exposure rate.
'Ihe meter, suitably connected to the tube, indicates the exposure rate on a calibrated scale.
4.0 calibraticn 137
'Ihe instrutent is factory calibrated with Cs p m whh is required after servicing, and at regular intervals specified by the appropriate regulatory agencies.
=
Place the instnment in a known radiation field with the incident radiation perpendicular to the front of the case. The CN tube is nounted intermily near the front of the case, ntered vertically and slightly to the right of center horizontally.
Individual ealibration controls areprovided for each range, and should be used to adjust the meter reading to correspord to the known egosure rate.
The locations of these controls are shown on a label in the case bottan.
tbte:
Do not disturb the settings of any controls except those marked X1, X10, and X100.
Calibration procedures shoukd follow those specified by the appropriate regulatory agencies.
i 4
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4 OPERCTG WS"MC"QCNS MODEL 400/410
~
SURVEY METER 1
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[VICTOREEN]
VICTOREEN NUCLEAR ABSOCIATES Victor een. Inc.
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CONTENTS SBCTION PAGE 1
I NT R000CT I ON................................... 2 2
SPECIFICATIONS.................................
3 3
Ot5CRIPTION.....................................$
4 OPERATION......................................
7 4.1 Boro Check................................
7 4.2 Sattery Check..............................?
4.3 Func t i on a l C hec k.......................... 7 4.4 Survey measurement.........................?
4.S Alare/Delt C11p...........................
8 4.6 Cautlens..................................
9 SERVICE INFORMAft0N...........................
10 S.!
T heo r y o f O pe r a t i o n...................... 10 S.2 Schematic 0tagram........................
13 S.3 Parts Layout.............................
15 S.4 Calibration and Adjustments..............
16 S.S Replaceable Parts List....................!O 1
1 1
e s
1.
INTRODUCTION The Victoreen Models 480 and 410 are radiation survey meters which use a single internal Geiger Mueller tube to detect a-ray and gaana radiation.
The meters contain a circuit (U.S.
Patent $4,311,969) which corrects for lost radiation pulses occurring coincidentally within the dead time of the GM tube.
The Model 400 is designed especially for NOT industrial radiography and meets requirements of USNRC If C.F.R.
34 regulations.
The meter operates over a range of leR/h to 1999mp/h.
The Model 414 operates over a range of imp /h to 10,000eR/h.
This entended range offers quantification of nearly the fu11 rate response of the GM tube before continuous discharge.
Both meters are exceptionally rugged due to a hi-impact thermoplastic water resistant case. They both provide a belt clip for convenience and an audible alarm for safety.
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2.
SPECIFICATIONS Radiation Detected:
Gamma and a-ray above 40 kev.
Ope r a t i ng Range:
408: 0-18, 0-198, 0-10ffmR/h 410: 0-10, 0-100, 5-1996, 0-10,000mp/h Controls Recessed rotary switch,
- Off, Battery Check and range selectione.
Readout:
Taut band meter - $5mm acate length.
Semilog with true aero.
Alare:
19db peak at
- 30cm, 3600Hr.
Audible internal speaker will alarm when meter le full scale on any range.
Energy Response Within 20% from 78 1200 kev.
Accuracy:
Within 15% of reading between let a nd 100% of full scale indication on any range. Calibration source is co-117.
Detector Energy compensated, halogen quenched GM tube.
Response Times Lees then 8 eec on 19en/h range, less 1991 finet reading) than 1 see on higher ranges.
Overrenge peeponse Full scale deflection up to 1990R/h free 40 to 1286 kev.
Environmental Effects:
Less then St ghange due to t empe r a t u r e 1-28 to
+55 C) and humidity 18 to 984th).
Constructions Molded hi-impac t thermoplectic case.
Circuit board mounted on molded in supporte.
Meter and GM tube shock mounted.
Ruggednese:
survive 3 foot drop onto concrete floor.
re!!ure rate 1 out of 20 triale. 1899 shoch in any piene.
Weter Reeletences Electronic housing sealed egelnet entry of water.
The bettery coopertment le spleshproof and sealed from the main electronics.
Dimenolones tems a 211mm a 47mm 13.2* s 0.3" e 1.9")
3
a sett clips Metal belt clip mounted oppoente the panel metet so that it can be toad by looking down at it.
Power pequirements: 9V alkaline battery, Mallory MN1454 of equivalent. Apptosisately les hout life at ambient rad 6ation and envetonmental levels.
Weight:
430gm (1 lb).
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3.
Ot3C81PTION litustration 3.1 is a pictoral description of the Model 400 with numbered callouts.
The Model 410 is identical in form a nd function escept for the edditional steed range posittee above slee.
l l.
The CM detector is internally mounted above the meter scale at the sean line.
2.
Number 2 on the meter scale is accented to aid in a survey for the regulatory 2me/h limit.
3.
Taut band meter is shock mounted to withstand a 3 foot drop onto concrete.
The SSum scale length is graduated j
into seen. log divisions with a true sero.
f 4.
A removable watertight plug allows access to the l
mechanical aero adjust of the meter.
i S.
The control to a $ position (6 for Model 4191 switch los I
selection of 0FF, Battery Check or Operating mange. The knob is recessed flush to the surf ace and can be operated by the user's thumb.
6.
The position identification of the control switch is part l
of the plastic overlay which has a very rugged and t
durable finish.
l 7.
The speaker for full scale alarm is mounted directly below the grill.
It is sealed against the entry of water.
8.
Two screws retain the battery compartment cover.
9 The battery compa r t men t cover is splashproof but not sealed.
The compartment itsetf is sealed from the rest of the meter.
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10.
On the opposite side is a metal belt clip. It is mounted so that when worn, the meter readout is visible as the l
user looks down to the meter.
1
i MODEL 400 SURVEY METER
~ __
l
- 1. InternalGM Tube
- 2. Accentedh. Ad in 2MR h Survey j
- 3. Readout mR/h 1
MM 4 loro Adjust i
- 6. Position identification
- 5. Reag ContM of Control $witen
$wetch 4
(Model 400).
t
)I Model 410 ertends l
toX1000.
i
- 7. Audible Alarm
)
- 8. Screws Retaining y,c, 8attery Cornpadrnent i
Cover
\\
L
., -,-.m i
- 10. Beft Clip on C
{
OpposMe Side (Notshown)
A ILLUSTRAT10N3.1-FRONTPANEL MODEL400
o 4
OPERAfl0N 4.1 toro check With the control switch in the OFF position and the meter readout facing up, check tf the meter pointer is within a half minor division of "0".
If not, see section S.4.5 of this manual for adjustment.
4.2 sattery Check Move the control switch to the BAT CHK position.
The meter pointer should be within the scale region indicated by BAT ONI if not, move the control switch to 0FF and replace the battery with a 9 volt alkattne. Mallory MN1604 or equivalent.
Refer to illustration 3.1, remove two screws 18) and battery compartment cover (91.
Battery can now be lifted out and replaced.
Do not putt on connecting wires. Replace cover and screws and repeat battery check.
4.) runctional check Move the control switch to the si range and place the seter on a stationary surface away from any radioactive sources.
Natural radioactive background (19 micro 9/h) and internal radioactive background of the GM tube itself will occasionally produce a single discharge which is observable on the meter readout. When this occurs, the meter polnter will deflect 1/4 to 1/2 of the first etnor scale division.
Observe the meter readout for 100 seconds; et least 4 such deflections should be observed.
If
- not, switch the instrument Orr and on s1 again and repeat the test.
If the in s t r u men t falls repeatedly, it may not be functioning properly and must be tested by a qualified service person.
If a high energy gamma button check source is available (such as 18 encro-Curie Cs-137 source, Nuclear Associates 062-103 or equivalent), position it over the CM tube (01, 111ustration 3.1).
A response on the meter readout should be observed if the instrument is functioning property.
The NA 062-103 source should cause a 1/2 te full scale deflection on the si range.
4.4 Survey Measurement Estimate the esposure rate which can be espected in the survey.
Move the conttot switch to the range position whose full scale value is greater than the estimated rate.
The numerical ma/h values on the meter scale are multiplied by the range value selected.
The si range is tems/h futt scale, the slee range is 1000es/h (1R/h) full scale.
7 D
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e For best results, direct the long amis of the instrument toward the radiation source to be surveyed.
The meter resdout should face the user for easy visual monitoring.
The instrument does have some angular dependence when the width ests imeter scale) is not perpendicular to line toward the sources therefore, this amis should be kept perpendicular.
This dependence is more severe for a-tay or gamma energies below 100 kev.
If no pointer deflection is observed, move the function switch to the nest lower range untti a deflection is observed.
optimum time constants have been designed into each range to average the pointer fluctuations. However, due to the statistical nature of radiation, some pointer fluctuation will be noticed. Readings on the al range in a radiation field of 2mm/h will be within 1S% of the true average 90%
of the time.
A better quantification of the radiation field can be obtained from the average of the maximum and minimum deflections observed over a 38 second period while the ins t rument is stationary.
Normally a survey measurement involves moving the survey meter and continuous monitoring of the readout.
If a deflection is observed and the range used is s1, the time constant will keep the pointer deflected for several seconde even if the survey meter is moved to a lower field.
To avoid waiting the normal time, the user can move the control switch to the s18 range and back to at to discharge the deflection caused by the past rate.
4.S Alarm /Delt C R When the meter pointer is deflecteil full scale on any range, a speaker mounted under the front panel grill 187, Illustration 3.1) will sound an intermittent alarm. This alerts the user immediately of a radiation rate higher than anticipated..The stare is nontatching and turns off when the meter moves off full acale.
A metal belt clip is located on the rear side of the case.
When attached to the user's belt, the meter readout faces out and can be read directly by the user by tooking down.
The belt clip and alarm are convenience and safety features not normally found in a survey meter.
Because of the light weight and small site of Models 499 and 418, they can be comfortably worn on the belt by the user when he is performing work activity around radiation.
When worn on the belt, the control switch should be on the si range to masimise the alarm sensitivity; ISep/h w!!! then activate the alarm. The alarm should be tested every time the survey meter is used.
8
t 4.6 Cautions i
al This radiation survey meter responds only to
-ray and gamma radiation in the energy range specified in section 2 of this manual.
Regardless of the intensity, this survey meter responds to neither a-ray and gamma radiation below 30 key nor to alpha or beta radiation.
j b) The response to pulsed radiation itypical for some -
ray machtnes) may be false and may indicate the pulse 1
repetition rate instead of radiation intensity.
I c) Agh ali ne batteries stop functioning below
-28'c l-4 F).
If the survey meter is worn under a coat, occasional use f rom under the coat may be possible.
d) RF electromagnetic radiation may cause a meter deflection.
This survey meter should not be used in l
1 the prev +nce of rf fields.
el Use this alarming survey meter as a supplement to a
]
personal pocket dosteeter.
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S.
SERVICE lhFORMATION S.! Theory of Operation inefer to the Schematic, Section S.2) i S.I.I sattery Power Supply This inst rument is powered by a single 9 voit 1
alkallne battery.
When the control switch (SIAL is turned to the battery check position, the 9V I
battery is connected to the noter.
R2S has been selected to allow the meter pointer to move into the " SAT OK" region if the battery voltage escoeds 6.25 volts. When switch SIA is turned to the nest position, the bettery's power is applied to the i
high voltage power supply and to the S volt I
regulator, US.
The battery's direct connection to the meter is opened.
j i
S.1.2 High Voltage Generation The CM tube requires SSOV to operate properly.
The high voltage is generated by the oscillator l
comprised of the following components:
71,
- C13, R26, C14 and Q4 The current, through one side of the primary of 71 and into the collector of Q4, starts the oscillator.
Feedback from the other side of the primary of T1, through C13, Cl4 and i
- R26, sustains the oscillations. The oscillations are prevented from appearing on the low voltage D.C.
power tracks on the PC board by CIS.
The voltage at the transformer secondary winding, T1:1, should be approminately 180V peak.
This voltage is doubled to 360V at the junction of D4 and C15 by the action of these two componen t s.
i The transformer secondary voltage is tripled to SSOV at the junction of Cl2 and DS by the action of these two components.
C16 filters the high voltage and 06 isolates C16 from the oscillating action of the voltage tripter.
"' R24 and R29 function as a voltage divider to feed back the output voltage to 06:2 238, R31 and R12 provide a reference voltage of approsimately 1.eV et 06:3.
If the SS9V output drops due to increased current flow in the GM tube caused by increased radiation, then U6 6 will drive more
[
current through R27 into the base of Q4.
This will cause the prisa6y of T1 to oscillate at a higher frequency, increasing the voltage back to SSOV and supplying more current to the GM tube.
The mesieve current flow through the GM tube is
[
limited by Rif.
If
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S.L.)
Radiation Detect 6on and Measurement When the gas 6n the CM tube (0181) is sontsed by a particle passing through it, current flows through all and A12.
If the radiat6cn to sufficiently high enough to cause the GM tube to enter into a continuous discharge condition then C3 watt charge to a level high enough to cause the control input (U3: 11) to d6sconnect U): 14 f rom U3:12 and connect U3:14 to U311).
When this happens the meter te pegged at futi scale and the full scale slarm to turned on.
all and C4 forms a differentiat 1 of the current flow through the GM tube.
Al4 protects the input of the cumparator (U2:23 hts and att set the threshold of the comparator to 18eV.
CS prevents the comparator from oscillating due to an input having a slow fall time.
A high going pulse at U2:2 will cause the output 1U2:1) to pulse low and discharge C6.
U2 is an open collector comparator, therefore, C6 can only be charged by ML7.
The time constant of m17 and C6 is approelmately Seu sec.
This is slightly greater than the recovery time of the CM tube.
The input of the second compa r a tor (U2:S) is blased at 2 volts by att and N19.
C7 prevents this comparator troe osc611ating due to an input w&th slow rise time.
U28 7 outputs a positive Se eterosecond pulse for every single particle that J
6e detected by the GM tube.
p28 is the pull-up res6stor for the open collector output of U2 7 C8 and m22 provide a 4.7 microsecond pulse to the 4
control input (U389) of a SPOT analog switch.
J this analog switch normally connects C1 and C10 to A
the voltage reference established by 92, 23 and
)
921.
When 0389 pulses high, the analog switch connects C9 and C10 to C11.
The amount of charge transferred dimin6shes as the voltage builde use on CIL with increasing radiation.
This characteristle of the circuit gives the instrument its se'at.logarithane meter scale.
Charge flows from Cll, through the range selection reststor network (U7) and then through U):2 to j
- ground, the voltage on C11 le an equilibrive condition between the charge transf erred to C11 by C9 and CIG and the charge removed f rom Cll by U7 Normally a surve',' meter will read erroneously low when 6t is placed in radiation of enough intensity that a significant percentage of the particles passing through the GM tube occur during the L1
I h
l P
recovery time of the tube dun to a previous particle.
This is referred to as " coincidence l
loss".
This instrument contains a patented coincidence lose recovery circuit.
As particles strike the CM tube faster than it can recover, U2:1 will keep C4 discharged for longst periods of 5
time.
This causes U2 7 to remain high longer.
l This high level is connected to the control input 6
of an analog switch 103:18).
The analog switch will be held open as long as U2t? to high.
Since charge connut flow from Cll, through U7, when the analog swltch is open, Cll is maintained at a higher voltage.
At lower levels of radiation, charge flows through U7 a greater percentage of the time.
The range a
select switch (Ste) connects progressively more of the resistors in the network (U 7) together as i
higher ranges are selected.
The voltage from Cl! is present at the input of I
another SPDT analog switch (Ulil2).
U3:14 le connected to U3:12 when Uls t! ne low.
U4 buffers i
the voltage at U3:14 and drives the meter through t
n24.
S.1.4 rull-Scale Audible Alarm The audsble alarm is a JNHs tone, pulsed at a (Ns rate.
01:18 in conjunction with Al and Cl generates the 2%8es square wave.
U1:4 in conjunction with R4 and C2 generates the 33)us square wave. The square wave at 01:4 is gated off
(
and on by the square wave at Ultif.
Ult) is the 6nverse of the deveform at Ull4 When U484 reaches 2 volts the noter will be at its full.
}
scale position.
p23 is adjusted to turn on QI i
when the meter reads full-scale.
t a9 prevents improper adjustment of 921 free damaging U4 or 01.
When QI turns on 6t pulls the base of Q2 and 9% to ground.
This turns Q2 off and allows me to enable Ulst).
U8:11 drives Q) through N7 R7 limits the base current of Q).
AS limits the current through the audio transducer 18P1).
D7 clamps the negative voltages generated by the inductance of Spl.
12 i
I
p S.4.5 toro Adjust lback of case need not be removed)
The meter readput f or Models 499 and 419 are factory adjusted to aero with the control switch in the OFF position.
Normally this will not reluire further adjustments if the instrument is not abused.
The meter aero will change occasionally with a govere shock.
To adjust the meter pointer b.eet to aeron
- 4) Turn the function switch to Orr.
b) Position the instrument with the meter readout
=
facing up.
c) Demove the black rubber stopper labeled Zero Adjust in Illostration 3.1.
d) Using a small screwdriver. turn the esposed slot until the meter pointer is on "0".
el peplace the rubber stopper.
It will be necessary to twist it into the hole because it is slightly oversised.
It is very important to replace the rubber stopper to protect the electronics from water entry.
17
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INSTRL'CTION MAM1AL i
FOR j
M DR 492 l VICTOREEN l RADIOGRAPilIC SURVEY METER f
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TABLE _OF CONTENTS Paragraph Title M
1 General Description.
1 1.1 Purpose of Equipment I
1.2 Physical Description 1
1.3 Specifications 2
2 Operation....
3 2.1 Mattery Installation 3
2.2 Battery Test 3
2.3 Radiation Measurements 3
2.4 Use of Carrying Scrap.
4 3
Circuit Description....
4 3.1 General................
4 3.2 Ceiger Tube.
4 3.3 Power Supply 7
3.4 Pulse Shaping Circuit 8
4 Maintenance.
8 4.1 Battery Replacement 8
4.2 Power Supply Adjustment 8
4.3 Calibration....
9 4.4 Checking Pulse Shaping and Metering Circuit 9
ILLUSTRATIONS I
I Figure g
1 Model 492 Radiographic Survey Meter 1
2 Attachment of Carrying Scrap.
5 3
Energy Response 5
4 Schematic Circuit Diagras 6
LIST OF TABLES Last Table !
Electrical Specifications 2
Table 11 Mechanical Specifications 2
APPENDICES
?.*Lt j
Appendix !
List of Replaceable Parts...
11-15 I
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1 Ceneral Description 1.1 Purpose of Equipment - ne VICTOREEN Model 492 Radiographic Sur-vey Meter provides a fast, accurate determination of X and gamma radt-ation leaks at X-ray installations, hospitals, and industrial facili-ties.
Re instrument satisfies all NRC requirements for industrial radiography.
Reliability and accuracy under rough field usage are assured by the solid-state design and rugged construction.
Ere.
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Figure 1. Model 492 Radiographic Survey Meter 1.2 Physical Description - Re Model 492 is a portabic, self-contained instrunent housed in a two-piece splashproof metal case.
The single operating control, conveniently located on the case top, provides on-off switching, range selection, and battery testing.
Re batteries are retained in a high-impact plastic battery compart-ment which cannat be corroded by battery leakage fluids.
The battery contacte, are readily replaceable without tools to facilitate cleaning or replacement.
De CM tube detecting element is mounted inside the case for ruximum operating convenience.
No external probes are required.
A phone jack is provided for the connection of a Model 490-50 Loudspeaker or 490-4 Headphone to allow aural monitoring.
This is especially useful for detecting rapid changes in dose rate without constantly watching the indicating meter.
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1.3 Specifications - The electrical and mechanical specifications for 1
the instrument are listed in Tables I and !!.
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TABLE It ELECTRICAL SPECIFICATIONS t
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Feature Specification l
+
I Ranges...
0-10. 0-100, 0-1000 mR/h in three i
linear ranges h
l De t e c t o r...............
Halogen-quenched GM tube
{
Accuracy.
1 20% of full scale on all ranges when calibrated with Cestun-137 j
Response Time (10%-90%)
10 seconds nominal
{
Temperature Range
..... -20' F to 120' F (-29' C to 49' C).
i excluding batteries.
Alkaline batteries i
1 are recommended at temperatures below 1
32' F (O' C).
Battery Complement
.... TVo D size cells, NEDA Type 13 or 813 Battery Life.
150 hours0.00174 days <br />0.0417 hours <br />2.480159e-4 weeks <br />5.7075e-5 months <br /> at 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> / day with standard carbon-zine batteries Energy Dependence See energy response curve. Figure 3 j
Instrument normally calibrated with Cestun-137 I
i TABLE II:
MECHANICAL SPECIFICATIONS i
n L
i Feature Specification 1
I Dimensions......... 4-1/2" (11.4 cm) wide x 8-3/4 (22.2 cm) long x 6" (15.2 cm) hish (includins handle) i Ne t Weigh t 3.5 lb (1.6 kg)
Construction......... Splash-proof, shockproof, two-piece all metal case j
Controls.................. S-pos ition range selec to'r and battery test switch i
)
Optional Accessories.
Vinyl carrying strap i
Loudspeaker 490-50.
Headphone 490-4 a
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c
- I t
i
o The sensing portion of the instrument, the Ceiger tube, is mounted near the f ront of the case, centered vertically and slightly to the right; of center horizontally. The incident radiation should be normal to the f ront of the case in line with the Ceiger tube.
The meter scale is calibrated directly in mR/h for Cestun-137 ganna radiation.
Refer to the Energy Response Curve, Figure 3. for the re-sponse to other energies.
An audible indication of relative dose rate is available by connect-ing a 490-50 toudspeaker or 490-4 headphone to the phone jack.
2.4 Use of Carrying Strap - A vinyl carrying strap with its attaching
)
strap buckles is optional.
The strap anchors are arranged in such a way that the meter is unobstructed when the instrument is carried f rom the shoulder.
Refer to Figure 2.
3 Circuit Description
- .1 Ceneral - The overall operation of the Model 492 can best be un-derstood by referring to the schematic circuit diagram, Figure 4 The GM cube detector is supplied with a regulated high voltage from the powe r supply, via K1. When the detector is energized by a photon of radiation, the current through R1 increases briefly, causing a negative pulse to appear at C1.
This pulse is coupled via C1 to the pulse shap-ing circuit which amplifies and shapes the pulse.
The shaped pulse supplies current for readout to the meter and its associated response time circuit.
3.2 Calmer Tube - The Celger tube consists of a thin cylindrical shell which is the cathode, a fine wire anode suspended along the longi-tudinal axis of the shell, and an inert gas into which a small amount of a halogen gas is inserted to act as a quenching agent.
A potential of approximately 600 volts is maintained between the two electrodes with the anode always positive.
This voltage is slightly-less than that required to produce a discharge in the gas. When a nuclear particle or ray of sufficient energy enters the Ceiger tube, it lonises a molecule of the inert gas.
secause of the high voltage j
maintained between the electrodes, the positive ions are attracted to the cathode and the electrons are attracted to the anode.
In their l
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2 Operation 2.1 Battery Installation - Snap open the pull catches at each end of the case and remove the case bottom.
This will expose the circuit board assembly and the battery compartment.
Squeeze the battery retainer clamp to remove it from the compartment.
Install standard D size flashlight cells in the openings provided, observing the proper polarity.
Replace the retainer clamp and the case bottom.
If operation below 32' F is contemplated, use alkaline batteries.
Re-move all batteries if the instrument is to be stored for any extended period of time.
2.2 Battery Test - Turn the selector switch to the BATT position.
If the meter does not read within the check band, the batteries must be replaced.
The battery test may be performed at any time, whether the instrument is in a radiation field or not.
W A R N I N G_f_
An external source of ionizing radiation of the type the instrument was designed to measure must be used to determine proper operation of this instrument.
This is the only practical method of determining if the inst rument is responding to radiation.
Failure to conduct periodic performance tests in accordance with ANSI N323-1978, Paragraphs 4.6 and 5.4, and to keep records thereof in accordance with paragraph 4.5 of the same standard, could result in erroneous reading of potential danger.
ANSI N323-1978 becomes, by this reference, a part of this operating procedure.
2.3 Radiation Hemeurements - Three operating ranges (X1, X10, and X100) are provided.
These correspond respectively to 10,100, and 1000 milli-roentgens per hour (mR/h) full scale.
For best reading accuracy, switch to the range which provides a reading in the upper 80% of the meter scale.
-3
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4, 9
Figure 2.
Attachment of Carrying Strap e.s -
=
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7 a
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M 40 70 to to too soo aco soo eso seco 2000 137Cs E Cn MeV EFFECTivt Tigure 3.
Energy Response
-S-
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movement toward the electrodes, these charged particles trigger the ionisation or additional gas molecules, resulting in an avalanche of ions flowing between the electrodes.
The gas discharge thus created is similar to the glow of a neon lamp.
The tube conducts as long as the gas is in the ionised state.
The small amount of halogen gas in the gas mixture quenches the flow of ions, suppressing further electron avalanches unt.1 another nuclear particle or ray enters the tube.
This glowing and quenching results in a rapid pulse or surge of current in the external circuit.
The number of pulses per minute is proportional to the amount of radt-4 ation present.
The meter, suitably connected to the tube, indicates the dose rate on a calibrated scale.
3.3 Fower Supply - The power supply provides two regulated outputs:
600 volts for the Geiger tube, and ~7 volts for the pulse shaping circuit.
The circuit operates as a blocking oscillator in the fly-i back mode.
}
The blocking oscillator portion of the circuit consists of transistor Q3, windings 3-4 and 5-6 of transformer T1, resistor R3, and the l
batteries.
C4 serves only to suppress high f requency parasitic os-ct11ations caused by the transistor parameters.
The high voltage power supply portion of the circuit consists of winding 1-2 of T1, diode CR1, the associated resistors and capacitors, and the corona discharge tube V1.
The low voltage section is com-prised of winding 5-6 of T1, diode CR3 and capacitor C9.
The operation of the power supply is as follows:
When the Instrument is turned on, Q3 conducts and an increasing current flows through wind-ing 3-4 and the collector of Q3.
This current induces a v< 1tage in winding 5-6 or such polarity as to sustain and increase the conduction of Q3.
The collector current continues to increase until 03 becomes saturated, at which time the current through Q3 and winding 3-4 reaches a constant value.
Because the current in winding 3-4 is constant, the induced voltage in winding 5-6 falls to sero, causing the base current to drop.
This decreasing current induces a voltage in winding 5-4 of such polarity as to turn of f the transistor.
Af ter the induced voltage at the base reaches sero, the transistor conducts again and the cycle repeats.
Potentiometer R3 controls the rate of repetition.
As a result of the flyback action of the circuit, large voltage pulses appear on all the transformer windings.
The voltage present is pro-portional to the number of turns on the winding.
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o The voltage at winding 1-2 is rectified by CR1, filtered by C3, R2, and C2, and regulated by the corona regulator tube VI.
This provides 600 volts for the GM tube. At winding 5-6, the pulses are rectified and filtered by CR3 and C9.
The regulating action of VI, reflected back through the transformer, maintains the output of the low voltage supply at a constant level.
3.4 Pulse Shaping Circuit - The pulse shaping circuit, consisting of transistors Q1 and Q2 and their associated components, is a monostable, or one-shot rultivibrator.
Its function is to provide a uniform cur-rent pulse output for each pulse input, regardless of the shape or magnitude of the input pulse.
With no pulse input, Q2 is saturated due to the large base current supplied through R13.
Because the transistor is saturated,' the voltage across its' collector to emitter is about 0.2 volts.
This voltage is dropped to about 0.1 volt through R9 and R4, and applied to the base of Q1.
This ef fectively maintains Q1 cut of f; placing its collector at the supply voltage. Because there is no current through Q1, and thus through R5 and R6, the supply voltage also j appears at the junction of R5 and R6.
Whichever timing capacitor.(C5't,hrough C7) is connected in the circuit thus has a voltage drop across it equal to the difference between the supply voltage and the base voltage on 02.
i s
4 pbin tenance 4.1 Battery Replacement - The besr < preventive maintenance that can be recoc= ended is.to keep the ' instrument turned off when it is notl in use, to remove' the batteries'during extended periods of storage, and to be sure that fresh batteries are used.
Battery life is about 150 hours0.00174 days <br />0.0417 hours <br />2.480159e-4 weeks <br />5.7075e-5 months <br /> with carbon-zine cells when operated a an average rate of four hours per day.. Battery replacement is re-quired if the Battery Test, paragraph 2.2, is below the check band.
i 4.2; + Power Supply Adjustment - The operating point of the power supply oscillator is adjusted by means of potentiometer R3, located inside the case,on, the right when the instrument is viewed from a normal operating angle.
The adjustment provides for optimum battery life and voltage regu'latios. Check the setting before calibration, and af ter any com-ponents have been replaced.
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To check the operating point, insert a 0-100 mA meter in series with a fresh eet of batteries. With the instrument turned on, the current should be 33 mA with carbon-zine batteries and 30 mA with alkaline batteries.
If the current is within + 2 mA of the correct value, no adjustment is required.
If not, turn the POWER control. R3, counterclockwise, then clockwise until the correct value is obtained.
4.3 Calibration - The instrument is designed for long-term stability so that calibration should not be frequently required.
However, field calibration, preferably with Cesium-137 gammas, may be performed at any time in the following manner:
1.
Install a new set of batteries and check the Power Supply Adjustment according to section 4.2 before proceeding with calibration.
2.
Place the instrument in a 70 to 90 mR/h radiation field.
Distance should be measured from the center of the GM tube, V2.
3.
Switch the instrument to the X10 range and adjust the calibration control for a correct meter reading.
Th e calibration control, R8, is located inside the case, on the left side of the instrument as viewed f rom the normal operating position.
4.4 Checking Pulse Shaping and Metering Circuit - Af ter it has been determined that the power supply is operating properly, and af ter voltage and resistance checks have been made as indicated on the l
schematic, the monostable multivibrator may be checked with an os-cilloscope.
With the instrument measuring background, or with a small gamma source placed next to the GM tube, check for waveforms as follows:
e Q1 collector: Positive 7 volt square wave e Q2 base: Positive 3.5 volt pulse, rising sharply and decaying exponentially e Q2 collector: Negative 7 volt square wave The pulses will occur with each input pulse.
The nominal pulse width is 7 milliseconds on the X1 range, 799 microseconds on the X10 range and 70 microseconds on the X100 range.
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l Gamma Century Radiography Exposure Device Lightweight, rugged, safe and simple to operate, the Gamma Century is the choice of radiographers throughout the world with years of outstanding field use to I
support its reliable yet simple design.
Isotope Radiography Devices & Accessories
Comme Industrics Contury "S" & "SA" Radicgraphy Exposuro Dcvico Cctslog Numbers: 821 1001-005 ("S"); 821-1001-006 ("SA")
Purpose "SA" Safety Features The Gamma industries' Century is a rugged radio.
- 1. The source cannot be exposed unless a secure graphy exposure device for making radiographic connection between the source assembly and cxposures with Iridium-192. The Century is versa-the control assembly is made.
tila and is suitable for meeting those radiography
- 2. The source assembly cannot be disconnected n eds in the laboratory as well as those under the after use unless the source is in the safe posi-most extreme environmental conditions. It meets tion in the shield.
DOT standards as a transport container, and with d:pleted uranium shielding, is lightweight and rm em portable. These two features and the general r-m -,
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"S" Lockbox "SA" Lockbox Dascription The Gamma Century is compact and entirely self-contained with a nominal capacity of 100 curies of Iridium-192. Depleted uranium is employed as the shielding medium for the source. Positive mechan-ical control of the source is provided by Control Assembly and Source Guide Tube attachments. A safety plug in the outlet nipple and a safety cap in tha lock box assure the security of the source whan not in use. The source cannot be withdrawn from the shield through the lock box. Key-operated locks prevent use by unauthorized persons.
Specifications Attachments
. isotope; irieium.,92
. Source Guide Tubes
. Control Assemblies e Mo[e
'? ' A - or A 1 A Su S
S:e corresponding catalog sheets for these items.
"SA" A-2-A
. Shielding Material: Depleted Uranium
. Shielding Weight: 26 lb. (12 kg.)
Accessories
. Device Weight:
42 lb. (19 kg.)
. Shipping Weight:
65 lb. (30 kg.)
. Panoramic Collimators
. Side Collimators
. Dimensions:
Height-10 in. (25 cm.)
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Due to Gamma industries' continuing program of research and engineering development, all specifica-tions subject to change without notice and may be varied at manufacturer's discretion i
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Ccli Toll Free 1 800-535-8132 (except in Louisiana) uMuuuuuuU H%P%wU H me Office-Manufacturing Y
P.O. Box 2543 P.O. Box 125 P.O. Box 34526 IE Mw a 2255 Ted Dunham Avenue 201 Grefer Avenue 9320 Tavenor Lane A oIVIStoN of NuCLEA A SYSTEMS #NC Baton Rouge, LA 70821 Harvey, LA 70058 Houston TX 77034 (504)388 0800 (504)366-6462 (713)944-7676
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""'"' Y 'I ' 79 CATALOG DWG. FOR CENTURY 'S*,'SA &35'S*,'SA 605-7001-002 REV 56 2L23[81
GAMMA INDUSTRIES' MODEL GAMMA CENTURY S & SA Your GAMMA CENTURY SA exposure device is the result of our best efforts in engineering, materials and workmanship.
Nothing has been spared in our endeavor to make this unit the finest radiography device on the market.
Drawing #142 at the back of this pamphlet is a cross-sectional view of the unit with source pigtail in position.
You will note that the component parts are essentially the depleted uranium shield, the steel case, top and bottom saddle plates and lock box.
In addition to the top and bottom saddle plates used to support the shield, polyurethane is employed as support for the shield casting.
With only a minimum of maintenance, your unit should give trouble free, safe operation for an indefinite period.
DESCRIPTION The GAMMA CENTURY SA is a uranium-shielded industrial radiography device for the making of panoramic and similar exposures with iridium 192.
The unit is distinguished by the following features.
CAPACITY Maxinum capacity is 100 curies of iridium 192.
REMOTE CONTROL Positive mechanical control of the source is provided
Page 2 by a 25 foot control assembly and a 14 foot source guide tube.
No external power supply is required.
MOBILITY The GAMMA CENTURY SA is compact, entirely self-contained and weighs only approximately 38 pounds.
SAFETY FEATURES A safety plug in the outlet nipple and a safety cap in the lock box assure the security of the source when not in use.
The source cannot be exposed unless a secure connection between the. source pigtail assembly and the control cable is made.
This feature is provided only on the SA model.
The control cable cannot be disconnected af ter use 'inless the source is in the safe position in the shield.
This feature is also provided only on the SA model.
The source cannot be withdrawn from the shield through the lock box even when the lock is open.
The GAMMA CENTURY S & SA meets all DOT regulations for shipping and all USAEC regulations for isotope radiography devices.
1 OPERATION 1.
Have an operating survey meter on hand always and use Lt.
i 2.
Remove the protector cap from the lock box thereby exposing the pigtail connector.
[
O Page 3 3.
Crank the control cable to a length of approximately six inches.
4.
Connect control cable to pigtail.
5.
Crank control cable in so that male connecting thread can be screwed into lock box.
6.
Screw connecting thread into lock box.
4 U
7.
Remove safety plug from protruding nipple located approximately 1" from top of unit.
7 8.
Connect source tube.
9.
Place free end of source tube in desired position trying to keep it in a straight line without kinks.
10.
Stretch control cable away from exposure device in as straight a line as possible.
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11.
Unlock the unit by turning the handle back (counter clockwise) which will permit the key to be turned.
This is required only on the SA model.
12.
Crank source out as smoothly as possible.
When you feel that source is approaching end of source tube, slow
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the turning speed so that pigtail does not strike the end of the source tube with undue force.
13.
Survey to see that radiation levels are within limits.
14.
At the end of exposure, retract source into unit.
15.
Now for the most important step of all:
Survey carefully to be sure that source has returned b
to safe position.
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Page 4 16.
Turn crank back (counter clockwise) and depress lock i
plunger.
The SA models only reg'uire that handle be g
pulled back.
17.
Disconnect cable.
18.
Screw safety cap into place.
19.
Disconnect source tube, g
20.
Insert safety plug.
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PERIODIC INSPECTION AND MAINTENANCE FOR GAMMA CENTURY, GAMMA "35",
SA MODELS, GAMMATRONS AND UTILITY TWINS Periodic inspection of exposure devices should be performed at intervals not to exceed 90 days or whenever operation of the device appears to be impaired through abuse or wear.
- However, it should be amphasized that this applies only to the device.
DO NOTHING TO THE SOURCE.
If the source appears worn or faulty in any way, contact Gamma Industries.
In order to perform device inspection and maintenance proceed as follows:
i l
l.1 Remove safety cap in lock box and inspect source connector.
The holding pin should still have a true 90 degree elbow; it should be straight and parallel with axis of source connector and the key on apex of elbow should not be worn excessively.
Check flexibile cable at connector for straight-ness.
Maintenance:
If the elbow is not bent out of line, the t
mating connector should then be connected to the source and tested by pulling straight back on cable applying about 30 to 40 pounds of pressure.
1.2 The lock plunger should be inspected and checked for ease of operation.
Foreign matter may at times foul the plunger
and make it inoperative.
The lock plunger may not retract to its fullest extent which is 1/2 inch.
This would pre-vent free travel of the source in and out of the lock box.
Maintenance:
The lock plunger may be removed by removing the two 8-32 set screws in the lock box.
Wash lock in sol-vent to remove dirt or other foreign matter.
Lock may also be cleaned and lubricated by spraying a lubricant (such as WD-40) into the lock.
4 1.3 Inspect the source outlet nipple by first removing safety plug.
The outlet nipple should be round and smooth so that it will match with the I. D.
of the source tube.
Maintenance:
If the outlet nipple should be out-of-round it can sometimes be straightened by using a punch or round bar on the inside of the outlet.
If it cannot be straight-ened or if the nipple has deen broken by dropping the unit, it must be replaced.
This replacement can be done in the field shop, or returned to Gamma Industries.
1.4 Inspect labeling on exposure device.
The warning signs and source identification tags should be distinct and legible.
1.5 Inspect source tubes for damage such as crimps, foreign matter, ease of connecting, and disconnecting from exposure
device.
Maintenance:
Crimps, kinks, and other damaged places may be cut out, and connectors placed on ends so that tube is not shortened excessively.
The quick disconnect coupling that i
connects to outlet nipple of exposure device may be removed 1
with heat and replaced.
Foreign matter may be washed from tube with solvent and blown with compressed air.
l 4
1.6 Inspect source connector on drive cable.
The hole should 1
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be 7/64 inch in diameter when new.
This hole should show some wear a f ter much use, but should not be out-of-round to the extent that it will disconnect from the mating piece other than in the correct position.
It should not be loose on the drive cable.
The portion of the connector with the connector hole should not be bent, but should be straight and parallel with body of connector.
Maintenance:
This worn connector may.be replaced by one of two me th ods.
1.
Send back to Gamma Industries to have new connector replaced by swedging on new replacement.
2.
Order new core with connector attached.
1.7 Inspect remainder of drive cable for wear, rusty sections, causing cable to become stiff and non-flexing, kinks, or other
1 damaging conditions that would prevent cable from running on gear in the gear box housing.
Maintenance:
The drive cable should be cleaned with a solvent such ~aus varsol, diesel fuel or some other solvent that will not dry out.
This is done to remove sand, dust and other foreign matter that will cause abrasions in the exposure device and gear box drive mechanism.
Drive cable that has become rusty and non-flexible should be replaced.
I Failure to replace cable may cause controls to become stiff, hard to operate, wear excessively, and possibly break.
The cable would usually break when the source is exposed.
Lub-rication of the drive cable is im por ta n t.
In areas where there is a problem with sand or other abrasive material, dry powered graphite is excellent.
Graphite should not be packed continually since it will tend tb pack in the gear box and cause excessive wear to the gear housing and to the gear.
Where the control cables can be kept reasonably clean, a light oil will be adequate.
1.8 Inspect the control assembly.
This assembly consists of the gear box assembly and the crank handle.
The bronze bushings in the gear housing and the plate are the most likely places to find wear.
When these bushings are worn
- Refers to old type control assembly For new type substitute " Ball bearing" for " bronze bushing" 1
they tend to permit the gear to wobble and eventually wear out.
Usually (due to some build-up on the drive cable or the gear teeth) there will be some wear around the inner circumference of the housing.
This will permit the drive cable to slip on the gear and prevent source form moving properly through the exposure device.
Maintenance:
It is suggested that if powdered graphite
~
is used as a lubricant the gear box be cleaned with j
compressed air occasionally so as to remove any packed graphite in the gear mechanism.
The application of some type light oil on bronze bushings will help prevent excessive wear.
i 1.9 Inspect drive cable housing or conduit.
This conduit can be j
h damaged by dropping it across a hot weld, severe kinking, or by dropping some object on the conduit.
Any of these can prevent the drive cable from moving freely.
The conduit at the end connections may become damaged from excessive flex-ing while being assembled or disassembled.
Maintenance:
In any case where the inner liner has been damaged, the conduit must be replaced.
When the outer covering has been damaged, waterproof tape should be wrapped around the break to prevent the entrance of water or other corrosive substances.
If the extreme ends of the conduit
are damaged, they tend to permit the gear to wobble and eventually wear out.
IMPORTANT - READ CAREFULLY BEFORE CHANGING SOURCE SOURCE CRANGING INSTRUCTIONS FOR C-10 SHIPPING CONTAINER i
Revised 4/22/74 j
j Attached is a cross-sectional view (Dwg. 323-Revision 1) of the shipping container used for transporting your pigtail source.
The container has two lock boxes--one on each side.
The upper lock box is labeled "NEW SOURCE" and the upper tube contains the new source.
The lower lock box and tube contain a safety plug when shipped to you.
The lower tube will be used to return the decayed source to Gamma Industries.
The following procedure should always be followed in the source changing operation:
ALWAYS HAVE A PROPERLY OPERATING SURVEY METER AT HAND WHEN CHANGING SOURCES'_
c 1.
Survey the C-10 shipping container with meter.
The radiation intensity should not exceed 10 mr/hr at 1 meter from any sur-face of the C-10.
2.
Open the lower lock of the C-10 shipping container.
Remove the safety plug.
3.
Connect one end of short exchange tube (provided in the shipping barrel) to the lower lock box of the C-10 shipping container.
Attach the other end of the short exchange tube to your camera.
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4.
Crank your old source into the C-10 shipping container until it reiches a definite stop.
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Survey to coeuro that tho old courco hoc reached a cafo position.
6.
Lock the lower lock of the C-10 shipping container'onto the old pigtail locking ball.
You must be aware that the source could be removed from the open and of the lock box if the lower lock is not locked.
7.
Remove the short exchange tube from the C-10 shipping con-Disconnect the control cable from the old pigtail.
tainer.
(Attemp't to move the pigtail into and out of the C-10 shipping container to assure the lock is depressed upon the pigtail locking ball.
If the pigtail can be moved, then open the lower lock, carefully move the pigtail, and lock the lock upon the pigtail locking ball.
This will assure that the old source will remain properly locked and shielded during the return shipment.)
Remove the source protector cap from the upper lock box and 8.
attach the source protector cap over the old source pigtail in the lower lock box.
Attach the control cable to the new pigtail which is in the 9.
upper lock box.
10.
Attach short exchange tube to the C-10 shipping container upper lock box.
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SHIPPING OCNTAINER 1
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- 11.. Unlock the upper lock from the new source.
s
'12.
Standing as far away as possible, crank the new source from the C-10 shipping container into your camera.
Pago 3 l'3.
Survey.
14.
Lock your camera lock.
15.
Remove the short exchange tube from your camera.
Remove the short exchange tube from the C-10 shipping container.
16.
Insert the safety plug into the uppar tube of the C-10 shipping container.
Lock the upper lock of the C-10 shipping container.
17.
Survey.
18.
Place the C-10 into the barrel in the same orientation which it was received.
Place the short exchange tube into the barrel.
Place the top on the barrel and secure with the locking ring.
l 19.
Insert a safety seal into the barrel locking ring.
~
(The fadiation intensity should not exceed 200 mr/hr 20.
Survey..
i at any barrel surface or 10 mr/hr at one meter from any barrel l
surface.)
1 l
END OF SOURCE INTERCRANGE INSTRUCTIONS j
Be sure that yout 1.
Attach two "Radidactive Yellow-III" labels to the barrel.
2.
Measure and write the transport index upon the affixed labels.
3.
Properly fill out all shipping documents.
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I Gammatron Cobalt
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Radiography Exposure
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i For applications requiring high energy i
radiography examination, the Gammatron Cobalt 60 radiography exposure devices are field-proven radiography systems.
Heavy section radiography in the field and fabrication shop is a reasonable task using i
the Gammatrons.
4 i
Isotope Radiography Devices & Accessories
Gamma Industrics Commatron 20A, 50A,100A, 200A Cctriog N umbers: 821 1001-014 (20A); 821 1001 015 (SOA); 821 1001 -016 (100A); 821 1001 -017 (2OO A)
Purpose The Gamma industries' Gammatrons are d:: signed to provide versatility, minimum weight, low maintenance and mobility for heavy industrial SpeCifiCQtlOnS radiography applications. By utilizing depleted 20A uranium shielding, welded construction and mounting with pneumatic tires, these units offer a
. Isotope:
Cobalt 60 high degree of mobility. Gammatrons are certified
. Nominal Capacity:
20 curies type B transport containers which are approved
. Source Model:
A7A forshipmentworldwide. All four models areiden-
. Shielding Material:
Depleted Uranium tical except for capacity and weight and con-
. Shielding Weight:
230 lb. (104 kg.)
v:niently use the same interchangeable controls,
. Device Weight:
310 lb. (141 kg.)
source tubes and accessories.
. Shipping Weight:
410 lb. (186 kg.)
. Dimensions:
See diagram 50A DasCriotion
. Isotope:
Cobalt 60 r
Tho Gammatrons are portable Cobalt-60 radio-
. Nominal Capacity-50 cunes graphy systems with nominal capacities of 20,50,
. Source Model:
A7A 100 and 200 curies of Cobalt-60. Positive mechan-
. Shielding Material:
Depleted Uranium ical control of the source is provided byControl
. Shielding Weight:
230 lb. (104 kg.)
Assembly and Source Guide Tube attachments. A
. Device Weight:
340 lb. (141 kg.)
sifaty plug in the outlet nipple and a safety Cap in
. Shipping Weight:
410 lb. (186 kg.)
tho lock box assure the security of the source
. Dimensions:
See diagram wh:n not in use. The source cannot be withdrawn 1OOA from the shield through the lock box. Key-operated locks prevent use by unauthorized persons.
- Isotope:
. Nominal Capacity:
100 curies
. Source Model:
A-8-A Attachments
. Shielding Material:
. Shielding Weight:
360 lb. (163 kg.)
. Source Guide Tubes
. Control Assemblies
. Device Weight:
515 lb. (233 kg.)
. Shipping Weight:
615 lb. (279 kg.)
S:o corresponding catalog sheet for these items
. Dimensions:
See diagram 2OOA i
MC95Sor195
. is t pe:
cobalt 60
. Nominal Capacity-200 curios
. Panoramic Collimators
. Side Collimators
. Source Model:
A8A
. Shielding Material:
S:o corresponding catalog sheet for these items.
. Shielding Weight:
3.60 lb. (163 kg.)
i
. Device Weight:
515 lb. (233 kg.)
g
,_ng
. Shipping Weight:
615 lb. (279 kg.)
. Dimensions:
See diagram p
Due to Gamma Industries' continuing program of research and engineering development. all specifica-
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tions subject to change without notice and may be varied at manufacturers discretion a>
Sales and Service ggggg g
i Ccil Toll Free 1800 535 8132 (except in Loulslana) wuuuuuuuu
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H:me Office-Manufacturing C
C P.O. Box 2543 P.O. Box 125 P.O. Box 34526 U u wU T
2255 Ted Dunham Avenue 201 Grefer Avenue 9320 Tavenor Lane A omStoN of NuCtf M SrSrf 4S WC Baton Rouge, LA 70821 Harvey, LA 70058 Houston, TX 77034 (504)388 0800 (504)366-6462 (713)944-7676
INSTRUCTION MANUAL GAMMATRON MODEL 100 and 100A GAMMATRON MODEL 50 and SOA GAMMATRON MODEL 20 and 20A GAMMA INDUSTRIES A DIVISION OF NUCLEAR SYSTEMS, INCORDORATED 2255 TED DUNHAM AVENUE BATON ROUGE, LOUISIANA 70821 I
e INSTRUCTION MANUAL GAMMATRON MODELS
1.0 DESCRIPTION
The GAMMATRON is a uranium-shielded industrial radiography device for the making of panoramic and similar exposures with cobalt-60.
The unit is distinguished by the following features.
1.1 Capacity Maximum capacity of the GAMMATRON 100 and 100A is 200 Curies of cobalt-60 for in-plant applications.
Ordinarily, field radiography is limited to 100 Curies of cobalt-60 by regulatory agencies.
The GAM:*.ATRON 100 anc~.100A can be provided with a cobalt-60 source specified by license up to 200 Curies.
The maximum capacity of the GAMMATRON 50 and SOA is 50 Curies of cobalt-60; the maximum capacity of the CAMMATRON 20 and 20A is 20 Curies of cobalt-60.
l 1.2 Remote Control Positive mechanical control of the source is prv.=ided by a 30-foot control assembly and matching source guide tube.
No external power supply is required.
1.3 Mobility The GAMMATRON 100 and 100A is compact, entirely self-contained and weighs only 475 pounds.
Roller-bearing wheels and pneumatic tires, together with'the " easy-press" handle permit easy handling of the unit by one man.
t i
4 1
Pcgs 2 Large eyes on the shield permit crane handling and the handle is easily removed for handling, crating or storage.
The GAMMATRON Models 50 and 20 are identical, except that their weight is 335 pounds and 300 pounds respectively.
1.4 construction Drawing Number 190-1 is a cross-sectional view with the source in the shielded position, showing the depleted uranium metal shield, the steel case and end plates with provisions for crane handling, the outlet nipple and the loc < box.
Polyurathene envelops the shield and fills the
.avity within the steel shell.
The carefully engineered simplicity of construction and skilled workmanship 4
minimize maintenance.
i j
1.5 Safety Features A safety plug in the outlet nippi,e and a safety cap in l
the lock box assure the security of the source when not in use.
The source cannot be withdrawn from the shield i
through the lock box even when the lock is open.
The GAMMATRON meets all DOT regulations for shipping and all USAEC regulations for isotope radiography devices.
2.0 OPERATION 2.1 Uncrating Approach crate only with an operating survey meter.
i
~
Pago 3 Remove rate.
Assemble handle.
Except for attachment of controls, the unit is now ready for use.
I NOTE:
AT NO TIME SHOULD ANY ISOTOPE RADIOGRAPHY DEVICE BE APPROACHED OR USED WITHOUT AN OPERATING GAMMA SURVEY METER OF APPROPRIATE TYPE AS WELL AS OTHER PERSONNEL MONITORING INSTRUMENTS.
2.2 Use 2.2.1 Place exposure device in the desired location and lay out. the control cable and guide tube as straight as possible.
Too many or too tight bends may restrict movement of the drive cable.
2.2.2 Remove safety plug from the lock box.
i l
l 2.2.3 Turn control crank forward (clockwise) and expose about eight inches of drive cable.
2.2.4 Connect control cable to source pigtail, matching i
keyway to key on the male and female Saf-T-Key l
connector.
2.2.5 Crank the control cable back in (counterclock-l wise) so that the male thread on the swivel connector can be screwed into the lock box.
Attach control cable.
l
Pago 4 C
2.2.6 Remove safety plug from the outlet nipple on the front of the shield.
h 2.2.7 Connect source guide tube by pulling back the' g
sleeve on the quick disconnect and slide the fitting over the outlet nipple.
Slide the l
sleeve toward the shield and turn it to lock in place.
d 2.2.8 Unlock the unit by pulling back on the crank I
handle (counterclockwise) which will permit b
the unit to be unlocked--only "A" models require l
that the handle be pulled back.
2.2.9 Crank source out smoothly, slowing the speed of cranking near the end of travel so as not to cause the source to strike the end piece with undue force.
5 2.2.10 Survey to determine that radiation levels are within prescribed limits.
2.2.11 At the and of the exposure, retract the source by cranking counterclockwise.
I 2.2.12 SURVEY CAREFULLY TO INSURE THAT THE SOURCE HAS RETURNED TO THE SAFE POSITION.
If the survey 4
b I
o
Pcg5 5 meter indicates that the source is not in the j
safe position, INSTITUTE EMERGENCY PROCEDURES AT ONCE.
t 2.2.13 Turn crank back (counterclockwise) and depress lock plunger--only "A" models require that the handle 1
be pulled back.
2.2.14 Disconnect control cable and screw safety plug in place.
j 1
2.2.15 Disconnect source tube and attech safety cap.
2.2.16 Return unit to storage area.
3.0 MAINTENANCE AND INSPECTION _
Periodic inspection of exposure devices should be performed at intervals not to. exceed 90 days or whenever operation of I
i the device appears to be impaired through abuse or wear.
l However, it should be emphasized that this applies only to the device.
DO NOTHING TO THE SOURCE.
If the source appears worn or faulty in any way, contact Gamuna Industries.
In order to perform devien inspection and maintenance as follows.
l r
Pago.6 1
1 3.1 Remove sa fety cap in lock box and inspect source con-I.!
nector.
The holding pin should still have true 90 degree elbow, it should be straight and parallel with axis of source connector and the key on apex of elbow should not be worn excessively.
Check flexible cable i
at connector for straightness.
Maintenance:
If the elbow is not bent o'ut of line, the mating connector should then be connected to the source and tested by pulling straight back on cable applying about 30 to 40 pounds pressure.
3.2 The lock plunger should be inspected and checked for ease of operation.
Foreign matter may at times foul the plunger and make it inoperative.
The lock plunger may not retract to its' fullest extent which is 1/2 inch.
This would prevent free travel of the source in and 9
out of the lock box.
Maintenance:
The lock plunger may be removed by removing the two 8-32 set screws in the lock box.
Wash lock in solvent to removw dirt or other foreign s
s matter.
Lock may also be cleaned and lubricated by
(
spraying a lubricant (such as WD-40) into the lock.
v b
i n.
~
@cgo 9 3.3 Inspset the courco cutlot nippio by first removing safety plug.
The outlet nipple should be round and smooth so that it will ma tch with the I.D.
of the source tube.
l Maintenance:
If the outlet nipple should be out-of-l round it can sometimes be straightened by using a punch 1
or round bar on the inside of the outlet.
If it cannot be straightened or if the nipple has been broken by dropping the unit, it must be replaced.
This replace-ment can be dor e in the field shop, or returned to Gamma Industries.
3.4 Inspect labeling on exposure device.
The warning signs and source identification tags should be distinct and legible.
3.5 Inspect source tubes for damage such as crimps, foreign matter, ease of connecting, and disconnecting from exposure device.
i Maintenance crimps, kinks, and other damaged places may be cut out and connectors placed on ends so that tube is not shortened excessively.
The quick disconnect coupling that connects to outlet nipple of exposure device may be removed with heat and replaced.
Foreign matter may be washed from tube with solvent and blown l
Page 8 with compressed air.
3.6 Inspect source connector on trive cable.
The hole should be 7/64" in diameter when new.
Tnis hole should show I
some wear af ter much use but should not be out-of-round to the extent tha t it will disconnect from the mating piece other than in the correct position.
It should not be loose on the drive cable.
The portion of the connec-tor with the connector hole should not be bent, but should be straight and parallel with body of connector.
Ma in tena nce_:
This worn connector taay be replaced by one of two methods.
l 1.
Send back to Gamma industries to have n4w :onnector replaced by swedging on new replacement.
2.
Order new core with connector attached, t
3.7 Inspect remainder of drive cab'le for wear, rusty sections, causing cable to become stiff and non-flexing, kinks, or other damaging conditions that would prevent cable from running on gear in the gear box housing.
4 Maintenance:
The drive cable should be cleaned with a solvent such as varsol, diesel fuel or some other solvent that will not dry out.
This is.done to remove sand, dust and other foreign matter that will cause abrasions
1 Pag? 9 i
e in.the expocuro d3vico end goor box drivt mschanism.
Drive cable that has become rusty and non-flexible i
should be replaced.
Failure to replace cable may cause controls to become stiff, hard to operate, whar
(
0 excessively, and possibly break.
The cable would E
usually break when the source is. exposed.
Lubrication of the drive cable is bnpor tant.
In areas where there is a problem with sand or other abrasive material, dry 4
powered graphite is excellent.
Graphite should not be i
used continually; however, since the grapt ite will tend to pack in the gear box and cause excessive wear to the gear housing and to the gear.
Where the control cables can be kept reasonably clean, a light oil will be
- adequate, a
3.8 Inspection of control assembly.
This assembly consists of the gear box assembly and the crank handle.
The bronze
~
bushings in the gear housing and the plate are the most likely places to find wear.
When theue bushings are worn l
they tend to permit the gear to wobble and eventually 4
1 I
Usually (due to some build-up either on the wear out.
1 drive cable or the gear teeth) there will be some wear around $he inner circumference of the housing.
This 6
1
.-r.-
_.m.
--m.-
will p rmit tho drivo cablo to clip on tho goer and prevent source from moving properly through the exposure device.
Maintenance:
It is suggested that if powdered grdphite is used-as a lubricant the gear box be cleaned with compressed air occasionally so as to remove any packed graphite in the gear mechanism.
The applica tion of some type light oil on bronze bushings will help prevent excessive _ wear.
3.9 Inspect drive cable housings or conduit.
This conduit can be damaged by dropping it across a hot weld, severe kinking, or by dropping some object on the conduit, Any of these can prevent the drive cable from moving freely.
The conduit at the end conn ections may become 6amaged from excessive flexing while being assembled or dis-i assembled.
Maintenance:
In any case where the inner liner has been damaged, the conduit must be replaced.
When the outer covering has been damaged, waterproof tape shoul,d be wrapped around the break to prevent the entrance of water or other corrosive substances.
If the extreme ends of the conduit are damaged, these can be repladed with new pieces by returning the conduit to Gamme Industri(
d
Gamma e
Industries A DIVISION of NUCLEAR SYSrEMS. INC 9
j l
l Gamma Industries' Source Control Assemblies Gamma Industries' Source Control Assemblies have been designed with many years of manufacturing experience backing each feature. These controls allow the radiographer a method of rapid source movement which j
provides ease and reliability of operation.
l Source Control Assemblies Source Control Assemblies consist of the following parts which are described in detail on the reverse side of this sheet.
i
}
. Pistol Grip Assembly
. Conduit Assembly f
. Source Drive Cable
. Swivel Adaptor The Source Control Assemblies are available in five standard lengths and can be manufactured to your specific requirements.
i Standard Sizes Catalog Numbers 15 ft. (4.6 m.)
811 1002 016 25 ft. (7.6 m.)
811 1002 013 30 ft. (9.1 m.)
811 1002 017 40 ft. (12.2 m.)
811 1002 018 50 ft. (15.3 m.)
811 1002-035 Isotope Radiography Devices 8: Accessories
Comma Industries Ssurce Control Assemblies i
Pistol Grip Assembly catalog Number: 811 1002-119 The Gamma Industries' Pistol Grip Assembly is a cast hardened aluminum grip with a hobbed gear supported with ball bearings. These features result in a smooth operating, lightweight assembly that is rugged enough to give top performance in the field.
N Conduit Assemblies These flexible casings are designed to protect the Source Drive Cable in the environs of radiography. Casings are constructed with a tough polyethylene outer cover and liner with a phosper-bronze, wire-wound core. Brass machined fittings are swaged on either end of the casing to facilitate connecting to equipment. Conduit Assemblies are available in four standard lengths and can also be manufactured to meet specific requirements.
Standard Sizes Catalog Numbers 15 ft. (4.6 m.)
801 1002 105 25 ft. (7.6 m.)
801 1002 101 30 ft. (9.1 m.)
801 1002-108 40 ft. (12.2 m.)
801 1002 104 Source Drive Cable This cable is manufactured to the exact specifications of the aircraft industry. It is of phosper bronze material with a 19-strand inner core around which is wrapped a helix cable which fits the hobbed gear of the Pistol Grip Assembly. Various source connectors may be crimped onto the cable to i
facilitate the control of many source types. Standard assemblies have the Gamma industries' SAF-T-KEY A connector; connectors for other devices are available upon request.
Standard Lengths Catalog Numbers 30 ft. (9.1 m.)
801 1002-106 50 ft. (15.3 m.)
801-1002 103 60 ft. (18.3 m.)
801 1002 109 80 ft. (24.4 m.)
801 1002 107 Swivel Adapter Catalog Number: 801 1002-102 Swivel Adaptors are used to connect the control assembly to the radio-g-
graphy exposure device. They are constructed with a stainless steel sleeve and a brass male thread to give strength and prevent thread gauling.
Adaptors for other devices are available upon request.
Due to Gamma industries' continuing program of research and engineering development, all specif cations subiect to change without notice and may be varied at manuf acturer's discretion Sales and Service ggg A
Ccil Toll Free 1 800 535-8132 (except in Loulslana) wuuusuusu Home Office Manufacturing P.O. Box 2543 P.O. Box 125 P.O. Box 34526
~
2255 Ted Dunham Avenue 201 Grefer Avenue 9320 Tavenor Lane A OtvfSloN or NUCLE A A SySrfMS WC Scton Rouge. LA 70821 Harvey, LA 70058 Houston, TX 77034 (504)388 0800 (504)366 6462 (713)944 7676
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- 2. Control Conduits - 2 Per Assy GAMMA INDUSTRIES, BATON ROUGE, LA.
15ft. 801-1002,105 25ft. 801-1002-101
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f 200 CURIES IRIDIUM-192 The first portable crank-out type radiograpny device designed specifically for use with up to j
200 Curies fridium-192 has been introduced by SOURCE PRODUCTION AND EQUIPMENT CO.. INC j
Even with its increased capacity. the SPEC 2-T weighs no more than comparable 100 Curie I
units now in use The SPEC 2 T has many untQue features not found in existing units The durable aluminum handle provides storage for the safety plug and lock cap. The shape and low-profile of the unit renders it ' topole-proof" and allows it to be used in many positions The outlet nipple and control assembly connectors are protected from breakage by steel flanges.
thus eliminating one of the most common problems in field radiography The entire Unit is J
fabricated of heavy gauge stainless steel' A totally new innovation is the improved and ultra flexible control assembly. This assembly features a cast aluminum pistol grip-gear box combination with ball bearing mounted shaft.
.i 1
This light weight pistol grip assembly is extremely durable under field conditions.
j Sources for the SPEC 2 T may be changed in the field and are shipped from SPECin the SPEC
.I Model C-1 Source Changer You will find that the SPEC Model C-1 is one of the safest and most
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convenient changers introduced in years q
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TECHNICAL DATA on the SPEC 2-T CAPACITY: Any strength up to 200 Curies Iridium.192 WElGHT: 40 lbs DIMENSIONS: Length 124" Width 4's" Height (exc Har'dle) 4" RADI ATION LEVELS: Meets applicable requir.ments of State and Federal Regulatory Agencies.
CONSTRUCTION: Welded stainless steel lacket Depleted uranium shield secured with welded steel straps.
Both outlet nipple and control connections protected by Steel flanges. Source cannot be removed from rear of unit, even when unlocked.
HANDLE: Metal construction Provides storage for both lock cap and safety plug.
CONTROLS: The SPEC control assembly is one of the most advanced and break resistant systems available. It consists of a two piece cast alummum pistol grip featuring a roller bearing mounted gear shaft. 25 ft flexible nylon conduit is standard. Source tubes are of flexible construction and utilize quick disconnect couplings Source tubes are supplied 14 ft. in length standard or can be made to order.
SOURCE CAPSULE: Model G-1 stainless steel encapsulation Meets all applicable regulatory requirements.
SHIELD: Approximately 32 lbs of depleted uranium with a zircoloy tube All Specifications Are Subject To Change Without Notice.
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MODEL SPEC 2-T SAFETY INSPECTION AND MAINTENANCE PROCEDURES Although the SPEC 2-T radiography exposure device is designed for virtually maintenance-free operation, regulatory agencies usually require that a thorough inspection be performed at least every 90 days, or more frequent if the device appears to warrant it.
Maintenance procedures for the exposure device are simple and can be performed in the field.
Should a source require repair, however, return it to the manufacturer.
Do No_t attempt source repair.
A daily check list is affixed to the device for operator convenience.
A complete inspection procedure follows:
1.
Remove safety cap and inspect source connector.
The holding pin should still have a true 90 degree elbow; it should be straight and parallel with axis of source connector and the key on apex of elbow should not be worn excessively.
Check flexible cable at connector for straightness.
Maintenance:
If the elbow is not bent out of line, the mating connector should then be connected to the source and tested by pulling straight back on cable applying about 30 to 40 pounds of pressure.
If source connector is damaged, do not use.
Return unit to Source Production and Equtpment Co.,
Inc.
2.
The lock plunger should be inspected and checked for ease of operation.
Foreign matter may at times foul the plunger and
make it inoperative.
The lock plunger may not retract to its fullest extent which is inch.
This would prevent free travel of the source in and out of the device.
Maintenance:
The lock plunger may be removed by removing a set screw in the back of the unit.
Wash lock in solvent to remove dirt or other foreign matter.
Lock may also be cleaned and lubricated by spraying a lubricant (such as WD-40) into the lock.
l 3.
Inspect the source outlet nipple by first removing safety plug.
The outlet nipple should be round and smooth so that it will 4
match with the I.D. of the source tube.
Maintenance: If the outlet nipple should be out-of-round it can sometimes be straightened by using a punch or round bar on the inside of the outlet.
If it cannot be straightened or if the nipple has been broken by dropping the unit, it must be replaced.
This replacement can be done in the field shop or returned to Source Production & Equipment Co.,Inc.
4.
Inspect labeling on exposure device.
The warning signs and source iden tif icat ion tags should be distinct and legible.
5.
Inspect source tubes for damage such as crimps, foreign matter, ease of connecting, and disconnecting from exposure device.
Maintenance: Crimps, kinks, and other damaged places may be cut out, and connectors placed on ends so that tube is not shortened excess ively.
The quick disconnect coupling that
s l
I
-1 connects to outlet nipple of exposure device may be removed and replaced.
Foreign matter may be washed from tube with 4
i solvent and blown with compressed air,
,i 6.
Inspect source connector on drive cable.
The hole should be
.I j
7/64 inch in diameter when new.
This hole should show some wear after much use, but should not be out-of-round to the
{
extent that it will disconnect from the mating piece other i
than in the correct position. It should not be loose on the drive cable.
The portion of the connector with the connector 1
)
hole should not be bent, but should be straight and parallel with l
body of connector.
3 Maintenance:
This worn connector may be replaced by one of two methods.
L.
Send back to Source Production & Equipment to have new connector replaced by swaging on new replacement.
i 1
2.
Order new core with connector attached.
]
f 7.
Inspect remainder of drive cable for wear, rusty sections, i
causing cable to become stiff and non-flexing, k ink s, or other damaging conditions that would prevent cable from running on gear in the gear box housing.
Maintenance: The drive cable should be cleaned with a solvent such as varsol, diesel fuel or some other solvent that will not dry out.
This is done to remove sand, dust and other foreign matter that will cause abrasions in the exposure device and gear box drive mechanism.
Drive cable that has become rusty and non-flexible should be replaced.
Failure to replace cable 1
)
may cause controls to become stiff, hard to operate, wear excessively, and possibly break.
The cable would usually break when the source is exposed.
Lubrication of the drive cable is important.
In areas where there is a problem with sand or other abrasive material, dry powdered graphite is excellent.
Graphite should not be packed continually since it will tend to pack in the gear box and cause excessive wear to the gear housing and to the gear.
Where the control cables can be kept reasonably clean, a light oil will be adequate.
8.
Inspect the control assembly.
The bronze bushings (if used) in the gear housing and the plate are the most likely places to find wear.
When these bushings are worn they tend to permit the gear to wobble and eventually wear out.
This normally will not occur in control assemblies equipped with roller bearings.
Usually (due to some build-up on the drive cable or the gear teeth) there will be some wear around the inner circumference of the housing.
This may permit the drive cable to slip on the gear and prevent the source from moving properly through the exposure device.
Maintenance:
It is suggested that if powdered graphite is used as a lubricant the gear box be cleaned with compressed air occasionally so as to remove any packed graphite in the gear mechanism.
The application of some type light oil on bronze bushings or bearings will help prevent excessive wear.
y
,n
If the inner circumference of the housing is severly worn, it should be replaced.
9.
Inspect drive cable housing or conduit.
This conduit can be damaged by dropping it across a hot weld, severe kinking, or by dropping some object on the conduit.
Any of these can pre-vent the drive cable from moving freely.
The conduit at the end connections may become damaged from excessive flexing while being assembled or disassembled.
Maintenance: In any case where the inner liner has been damaged, the conduit must be replaced.
When the outer covering has been damaged, waterproof tape should be wrapped around the break to prevent the entrance of water or other corrosive substances.
If the extreme ends of the conduit are damaged, they should be returned to the manuf acturer for repair.
SOURCE PRODUCTION & EQUIPHENT CO.,
INC.
MODEL SPEC 2-T OPERATING M ANUAL SE" ML DESCRIPTION The SPEC 2-T exposure device is a remotely controlled uranium chielded radiography unit designed for use in the field as well as the laboratory.
The basic composition of the unit is the light weight depleted uranium shield with its zircoloy "S"
tube and a steel housing.
The SPEC 2-T is built for use under the most adverse conditions with virtually no maintainence.
The SPEC 2-T requires no external power source and its complete portability and light weight make field use by only one operator simple and efficient.
I S PECIFICATIONS Total weight of the SPEC 2-T is approximately 40 pounds and contains approximately 35 pounds of depleted uranium.
The case is heavy gauge steel built to DOT specifications.
The unit has been approved by all applicable regulatory agencies for use with an irLdtum-192 source up to 200' curies.
The source is controlled with a 25 foot mechanical control assembly.
The assembly is extremely light weight and the flexible sourca gutde tube used in this control assembly may be up to 23 feet long.
The handle of the unit is designed to store the protector cap and safety plug when these items are not being used.
This should olim,inate losing these parts, l
SPEC 2-T Page 2 S AF ETY The source is secured in the shielded position with a plunger-type keyed lock.
Further security is provided by a lock cap and safety plug when the unit is not in use.
The source can not be with-drawn from the back of the unit even in the unlocked position.
The rectangular shape of the unit makes it virtually impossible
- " topple" over and enables the operator to place it in an extremely l
small or constricted areas.
1 i
l OPERATING PROCEDURES 1.
Before handling the SPEC 2-T make sure you have an operable, calibrated survey meter and monitor every operation.
2.
Remove hhe satety cap from the back of the unit (ehd nearest lock) exposing the pigtail connector, l
3.
Turn the crank on the control assembly in a clockwtse direction to expose approxima tely eight tnehes of drive cable.
4.
Connect the drLve cable to the source pigtail.
5.
Crank the control assembly Ln a coun ter cloc'< wise direct ton so 1
that the swtvel connector can be threaded tnto the back of the I
j untt.
Screw the male connecting thread all the way into the back l
of the untt, i
6.
Remove safety plug from the outlet on the front of the un it by l
retracting the gutek dtsconnect coupling
SPEC 2-T Page 3
/.
Connect the source tube by snapping the quick disconnect coupli,
over the outlet nipple.
9.
Check to see that the end piece is securely in place on the end of the source tube.
Place the end of the source tube in the desired position while avoiding small radius bends and kinks.
9.
Fully extend the controls from the unit avoiding as many turns and kinks as possible.
} 10." Unlock the unit using key provided.
I' 11 To expose the source, turn crank handle clockwise.
As source nears 4
the end of the source tube, dimin tsh turning speed to prevent the l
source from hitting the end piece with undue force.
Count the l
number os crank turns so you will know when you are approching the i
end of the tube.
I 12.
Survey to determine if. radiation levels are appropriate.
13.
To retract the source after the exposure, turn the crank handle counter clockwise.
14.
Survey to ascertain that the source is'in the stored or safe position.
15 Lock the device by depressing the lock plunger.
Jiggle the connector to be certain that the pigtail is firmly locked in position.
16.
Unscrew the swivel connector and crank out approximately 8 inche s of the d 've cable.
17 Disconncet the alrivt: cabic from the source pigtnL1.
18.
Replace safety cap over the source pigtail.
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=
SOURCE OF QUALITY C-1 SOURCE CHANGER The SPEC Model C 1 Source Exchanger is a lightweight shipping container / source ex-changer device designed and built for safety.
Af ter years of service, the SPEC Model C 1 has been accepted as one of the safest source changers available. The device is designed to accommodate almost any length of pigtail type source with an activity up to 200 curies Iridium 192. The unit has been approved as both a source exchanger and a Type B shipping package by all applicable domestic and international agencies.
z j
The SPEC Model C 1 was designed to withstand the most rugged treatment it could i
normally receive. The basic composition is a welded, heavy gauge steel box containing a j
depleted uranium shield weighing approximately 45 pounds. Sources are secured in the i
shielded position with Steel, spring loaded plungers which secure the pigtails immediately i
{
behind the source capsule. The steel box, which is fitted with a padlock, cannot be closed i
unless the plungers are in the locked position for added safety.
l l
The C 1, which is approved as a shipping container, is normally shipped inside a steel 1
drum designated as a " convenience overpack." This drum provides an excellent receptacle for source tags, return shipping labels, source exchange tubes, and the like. The entire shipping package weighs only 65 pounds, l
l C@ Source Production & Equipment Co.,Inc.
a 625 Onley Street Kenner, L.a. 70062 Phone 5041464 9471
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bb.o SPECIFY SOURCE M0DEU I
a G-37 Source of Quality l
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I 100 CURIES COBALT 60 The SPEC Co-60 MODEL l exposure device is another rugged and dependable radiography unit intro.
duced by SOURCE PRODUCTION AND EQUIPMENT CO., INC l
This remotel'/ controlled unit has been designed for the most adverse field conditions with virtually no maintenance required. No external power source is required and its complete portability and light weight make both field and laboratory use simple and efficient Total weight of the SPEC Co-60 Model I is approximately 475 pounds and it contains approximately 350 pounds of depleted uranium The basic composition of the unit is the depleted uranium shield with its zircoloy "S" tube and welded steel housing The unit has been approved by all applicable regulatory i
agencies for use with a cobalt 60 source of any activity up to 100 curies A totally new innovation is the improved and flexible 30 ft control assembly This assembly features a cast aluminum pistol grip gear box combination with ball bearing rnounted shaf t This lightweight pistol grip j
assembly is extremely durable under field conditions
- " Source Production & Equipment Co., Inc.
1 625 Onley Street Kenner. LA 70062 Phone 504'464 9471 l
SOURCE PRO _ DUCTION & EQUIPMENT CO.,
INC.
MODEL SPEC Co-60 Modal I 7."".PATU9_MIT.A._h CCNERAL DESCRIPTION The SPEC Co-60 Model I exposure device is a remotely controlled uranium radiography unit designed for use in the field as well as the
'.abora to ry.
The basic composition of the unit is the depleted uranium shield with its zircoloy "S" tube and a steel housing.
The SPEC Co-60 Model I is built for use under the most adverse conditions with virtual.ly v.o caintainence.
The SPEC Co-60 Model I requires no external power source and it s-complete portability and light weight make field use simple and efficient.
1 l
SPECIFICATIONS Total weight of the SPEC Co-60 Model I is approximately 400 poundo and contains approximately 350 pounds of depleted uranium.
The case is heavy gauge steel built to DOT specifications.
The unit has been cpproved by all applicable regulatory agencies for use with a cobalt-60 cource of 100 curtes strength.
The source is controlled with a 25ft. mechanical contol asser.bly.
The assembly is extreecly light weight and the flexible source guide tube used in this control assembly may be up to 23 feet long.
SAFETY The source is secured in the chielded position with a plunger-type keyed lock.
Further security is provided by a lock cap and
? age 2
.e.y c:.tm #.cn che vn!.t 1 net in use.
The source can not be with-
)
drawn from the back of the unit even in the unlocked position.
The rectangular shape of the unit makes it virtually impossible to " topple" over and enables the operator to place it in an extremely small or constricted areas.
0",y/E QG_ PROCEDURES 1.
Before handling the SPEC Co-60 Model I make sure.you have an operable, calibrated survey meter and monitor every operation.
2 P.emove the safety cap from the back of the unit (and nearest lock) exposing the pigtail connector.
3.
Turn the crank on the control assembly in a clockwise direction to expose approximately eight inchen of drive cable, i
4.
Connect the drive cable to the source pigtail.
5.
Crank the control assembly in a counter clockwise direction so that the swivel connector enn be threaded into the back of the unit.
Screw the male connecting thread all the way into the back of the unit.
6.
P.emove safety plug from the nutint on the front of the unit by retracting the quick disconnect coupling, i
SPr.C C3-60 Model I r
Parc 3 7.
Connect the source tube by snapping the quick disconnect coupling ever the outlet rirric.
S.
Check to see that the end piece is securely in place on the end of the source tube.
Place the end of the source tube in the desired position while avoiding small radius bends and kinks.
9.
Fully extend the controls from the unit avoiding as many turns and
' inks as possible.
}
10 Unlock the unit using key provided.
To expose the source, turn crank handle clockwise.
As source neara i
the end of the source tube, diminish turning speed to prevent the l
cource from hitting the end piece with undue force.
Co6nt the I
number of crank turns so you will know when you are approching the end of the tube.
1?.
Survey to determine if radiation levels are appropriate.
'3.
To retract the source after the exposure, turn the crank handic counter clockwise.
14.
Survey to ascertain that the source is in the stored or safe position.
15.
Lock the device by depressing the lock plunger.
Jiggle the connector to be certain that the pigtail 19 firmly locked in position.
16 Unscrew the swivel connector and crank out approximately 8 inches of the drive enble.
17.
Disconnect the drive cable from the sourco pigtail.
'..C.
P.cplace safety cap over the source pigtail.
?
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S_0URCE PRODUCTION AND EQUIPMENT CO.. INC.
S??C Ca-6^ v0 DEL '.
SAFETY INSPECTION AND MAINTENANCE PROCEDURES Although the SPEC Co-60 Model I radiography exposure device is designed for virtually maintenance-free operation, regulatory agencies usually recytre that a thorough inspection be performed at least every 90 days, 1
or more frequent if the device appears to warrant it.
Maintenance procedures for the exposure device are simple and can be performed in the field.
Should a source require repair, however, return it to the manufacturer.
Especial 1*y do not attempt a source repair.
A daily check list is affixed to the device for operator convenience.
A complete inspection procedure follows:
1.
Remove safety cap and inspect source connector.
The holding pin should still have a true 90 degree elbow; it should be straight and parallel with axis of source connector and the key on apex of elbow should not be worn excessively.
Check flexible cable at connector for straightness.
ifaintenance:
If the elbow is not bent out of line, the mating 1
connector should then be connected to the source and tested by
(
pulling straight back on cable applying about 30 to 40 pounds of pressure.
If source connector is damaged, do not use.
Return unit to Source Production and Equ.'.pment Co., Inc.
2.
The lock plunger should be inspected and checked for ease of operation.
Foreigh matter may at times foul the plunger and
SPEC Co-60 Model I Page 2 make it inoperative.
The lock plunger may not retract to its fullest extent which is i inch.
Ihts would prevent free travel of the source in and out of the device.
Maintenance:
The ' lock plunger may be removed by removing set screws from the lock plunger housing.
Wash lock in solvent to remove dirt or other foreign matter.
Lock may also be cleaned and lubricated by spraying a lubricant (such as WD-40) into the lock.
3.
Inspect the source outlet nipple by first removing the safety plug.
The outlet nipple should be round and smooth so that it will match with the I.D. of the source tube.
Maintenance: If the outlet nipple should be out-of-round it can sonetimes be straightened by using a punch or round bar on che in.5ide of the outlet.
If it cannot be strai htened or if B
the nipple has been broken by dropping the unit, it must be replaced.
This replacement can be done in the field shop or returned to Source Production & Equipment Co., Inc.
4.
Inspect labeling on exposure device.
The warning signs and source identification t.ygs should be distinct and legible.
5.
Inspect source tubes for damage such as crimps', foreigh matter, ease of connecting, and disconnecting from exposure device..
Maintenance: Crimps, kinks, and other damaged places may be c'ut out, and connectors placed on ends so that tube is not shortened excessively.
The quick disconnect coupling that
SPEC Co-60 Model I, Pago 3 connects to outlet nipple of exposure device may be removed and replaced.
Foreign matter may be washed from tube with solven an.d blown wi:5 compressed air.
6.
Inspect source connector on drive cable.
The hole should be j
7/64 inch in diameter when new.
This hole should show some wear after much use, but should not be out-of-round to the extent that it will disconnect from the mating piece other than in the correct position. It should not be loose on the drive cable.
The portion of the connector with the connector i
j hole should not be bent, b'ut should be straight and parallel with body of connector.
Maintenance:
This worn connector may be replaced.by one of two methods.
l l
1.
Send back to Source Production & Equipment to have new connector replaced by swaging on new replacement.
2.
Order new core with connector attached.
7.
Inspect remainder of drive cable for wear, rusty sections, c.ausing cable to become stiff and non-flexing, kink s, or other
}
damaging conditions that would prevent cable from running on gear in the gear box housing.
Ma in ten ance: The drive cable should be cleaned with a solvent such as varsol, diesel fuel or some other solvent that will not dry out.
This is done to' remove sand, dust and other foreign matter that will cause abrasions in the exposure device and gear box drive mechanism.
Drive cable that has become rusty I
and non-flexible should be reolaced.
Failure to replace cable m
o EPFC Co-60 Model 1
..u t 4 s c'. hard to enerate, wear
- v.aansa co-trelp te
'..,.9-u oe excessively and possibly break.
The cable could actually break when the source is exposed.
Lubrication of the drive cable is important.
In areas where there is a problem with-aand or other abrasive material, dry powdered graphite is excellent.
Graphite should not be packed continually since d.t will tend to each in the gear box and cause excessive voar to the gear housing and to the gear.
Where the control cables can be kept reasonably clean, a light oil will be edequate.
7.nsnect the control assembly.
Sometimes (due to some build-up on the drive cable or the gear ceuth) there will be come wear nround the inner circumference of the housing.
This cay' permit the drive esbie to elio on the gear and prevent the source from moving properly through the exposure device.
'*.lntenance:
It is suggested that if powdered graphite is
- ed es a lubricant the gear box be cleaned with compressed air occasionally co 29 to remove any packed eraphite in the gear veckanina.
The application of some type light oil on bronze bunhings or bearings will help-pcavent excessive wear. If the inner circumference of the housing, is severly worn, it should be replaced.
T.cnnect drive cabl.e ho'.' sing o* conduit.
This conduit can be damaged by dropoing it across a hot weld, nevere kinking, or by cropping some object on the conduit.
Any of these can prevent
connections may become damaged from excessive flexiIng while b e tn.e. assembled or disasserbled.
d'1_intenance :
In any case where the inner liner has been damaged, the conduit must be replaced.
When the outer covering has been damaged, waterproof tape should be wrapped around the break to prevent the entrance of water or other corrosive substances.
7.f the extreme ends of the conduit are damaged, they should be recurred to the manufacturer for repair.
)
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$b I
OPERATION and MAINTENANCE MANUAL Model 630 SERIES i
GAMMA RAY PROJECTION SYSTEMS 4
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I TECHNICAL OPERATIONS, INC.
Radiation Products Division i
Burlington, Mass. 01803
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I Phone (800) 225-1383 (toll free)
[in Mass. call (617) 272 2000]
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TABLE OF CONTENTS 1
SECTION I GENERAL INFORMATION 1-1. General 3
3 1-2. System Safety 3
1-3. System Components 5
l-4. Radioactive Source Assembly.
5 l-5. System Optional Accessories 5
l-6. Principles of Operation 5
l-7. Specifications SECTION 11 RECOMMENDED SAFETY PRECAUTIONS 7
2-1. General 7
2-2. Radiation Measuring Instruments 7
2-3. Working Distance 7
2-4. Exposure Time 7
2-5. Shielding 7
2-6. Hand-Carrying 7
2-7. Shipping SECTION lil UNPACKING AND STORAGE 3-1. Initial Inspection 8
8 3-2. Unpacking 3-3. Component inspection 8
3-4. Storage 8
l SECTION IV OPERATION 9
4-1. Preparation for Use 11 4-2. Operation 12 4-3. Operator Disassembly SECTION V MAINTENANCE 13 5-1. General 5 2. Control Cable 13 5-3. Guide Tubes 13 5-4. Cleaning and Lubricating System Cables 13 5-5. Replacing the Control Cable
....I4 5-6. Odometer Adjustment 14 5-7. Source Replacement
.........................................14 5-8. Control Unit Repair 14 SECTION VI REPLACEABLE PARTS 6-l. General 15 15 6-2. Gamma Ray Projector 15 6-3. Tripod Stand 15 6-4. Guide Tubes 6-5. Control Units 15 1
toeoost==0 caOACTO*
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(a) 660-664 System l-N A%
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(b) 660693 System
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pgy,e 1 1. 660 Series Portable Gamma Ray Projector Systems.
4 sofer to S*(il*" II "*****"
2
SECTION I G EN ERAL IN FO RM ATION 1 1. GENERAL
- a. Gamma Ray Projector Model 660.
The 660 Series Portable Gamma Ray Projector The Gamma Ray Projector, shown in Figure 1-2, Systems, shown in Figure 1-1, are used primarily can be used in either system. The projector serves for industrial radiography. The systems operate in as the storage and transport device of the radio-similar manner and differ only in the type of con-active source assembly. The projector consists of a trol unit supplied.
steel housing which contains approximately 29 The portability feature of the system prosides pounds of " depleted uranium" shielding material.
both a safe means of transporting the radioactive When the source is properly stored in the projec-
. source and o perating flexibility, particularly tor, the effective shielding properties of the de-needed in limited access areas. In use, either system pleted uranium reduce radiation at the projector safely positions an Iridium8 radioactive source exterior to a level well below the regulatory mr/hr at a predetermined location. The 3600 (pano-limits prescribed in applicable NRC regulations.
ramic) radiation pattern may be used to full advan.
Figure 1-2 shows both ends of the projector. A tage, either for multiple specimen work or for cir-special fail-safe connector is located at one end.
cumferential exposure techniques. Optional col-This connector is used to engage the cable from the limators are available which limit the panoramic control unit. The safety features of the connector pattern to a directional beam. The systems may be were discussed in paragraph I-2. The control con-used with Iridium isotope sources up to a maxi-nector contains a three-position selection device -
mum of 100 curies. Iridium2 sources of other OPERATE, LOCK, and CONNECT. For maximum capacities are available, upon request. Basic source safety when the projectoris disconnected from the information is contained on the nameplate of the control cable and guide tubes, the connector source shield (projector).
should be in the LOCK position with the attached lock and storage cover engaged and the key re-
- 12. SYSTEM SAFETY moved. All of the connector positions are discussed The systems provide maximum operator safety.
in detail in Section III, Operation. The guide tube A positive mechanical control of the source and an connector is located at the other end of the Projec-accurate visual indication of its position are given tor. Figure 1-2 identifies the connector. Also at all times. In addition, the systems have a fail-safe shown in Figure 1-2 is the storage plug which connection; where:
must be removed before the guide tubes are con-
- a. the system cannot be operated (source ex-nected. The storage plug should be used to pre-posed) unless a secure connection to the control vent dirt and dust from entering the projector cable is made, and whenever the projector is not in use.
- b. the controls cannot be disconnected unless The total weight of the projector is 44 pounds.
the source is properly stored in the shield.
The projector is 9%" high, 4%" wide, and 12%"
long (includes handle and connectors).
- 13. SYSTEM COMPONENTS All components of the 660-664 and 660-693
- b. Guide Tube Assembly.
Systems are identified in Figure 1-1. Components The guide tube assembly consists of one seven-common to both systems are discussed first. The foot master guide tube and two seven foot ex-l separate control units are discussed last.
tender guide tubes (see Figure 1 1). The master is l
l Refer to section II. Recomrnended Safety Procussions. before operating or wrvicing these systeen..
3
G AMM A RQY PROJECTOR SYSTEMS
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ocNatwove Figure 1-2. Model 660 Gamma Ray Projector the guide tube section which contains the snout or lightweight convenient storage cable reel. In oper-source stop at one end. The system should never be ation. the hand crank controls the movement of operated without the master guide tube attached the source from the storage position in the pro-to the projector. The two extender sections can be jector to *.ne exposure position in the master guide used as necessary to lengthen the guide tube to 14 tube. The odometer indicates the distance in feet or 21 feet. Both master and extender guide tubes and inches that the source has been moved from its are made from Dexible stainless steel tubing with a storage position. The reel provides a convenient protective polyvinyl covering. The three guide tube storage facility for both the control cable and the sections weigh approximately five pounds.
three guide tubes. The outer control tubing is sim-ilar to the construction of the guide tubes. The CAUTION inner spiral-wound flexible steel dnve cable (the NEVER OPERATE THE SYSTEM WITH MORE actual controlling element) terminates with the THAN THREE GUIDE TUBE SECTIONS (MASTER male section of a swivel type fastener used to SECTION PLUS TWO EXTENDER SECTIONS-TOTAL GUIDE TUBE LENGTH OF TWENTY ONE securely engage the female section which is at-FEET).
tached to the leader cable of the radioactive source assembly. The control tube is terminated at one
- c. Tripod Stand.
end by the connecting plug assembly which mates The tripod stand provides a means of securing with the fail-safe connector on the projector and at the snout end of the master guide tube section so the other end by fittings which attach it to the that the source can be positioned at the desired main frame of the control unit. The 664 control focal position. The stand has adjustable clamps unit with the control cable weighs approximately which will provide an unlimited degree of position-twenty two pounds.
ing flexibility. The weighted tripod base provides a
- e. Model 693 Control Unit.
solid foundation for the stand. The tripod stand-The 693 unit is used with the 660-693 Gamma complete with clamps, weighs approximately ten pounds.
Ray Projector System. The basic purpose of the 693 is similar to that of the 664 unit. However, the
- d. Model 664 Control Unit.
693 unit does not have the storage reel and is pro-The 664 unit is used with the 660-664 Gamma vided with a pistol gnp handle for convanient Ray Projector System. The unit consists of a hand operation. The 693 control unit with the control crank, odometer, and 25-foot control cable, and cab e weighs approximately nineteen pounds.
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)
4 Refer to Section !!. Recommended $sfety Precautions, before operating oe servicing these systems
GENE R AL INFORM ATioN
- 14. RADIOACTIVE SOURCE ASSEMBLY graphic focal spot. The hand crank will not turn l
The radioactive source assembly is the most vital any farther and the odometer in the control unit component in the system. It is supp~ tied and must should indicate a reading which approximates the be ordered separately from other system com.
total length of the combined guide tubes. To re-ponents. The system can operate with various capa-turn the source to the projector (stored position),
city sources up to the maximum 100 curies the hand crank is turned to the full RETRACT
(+20%). The source is contained in a stainless steel (clockwise) position.
capsule firmly attached to one end of the short leader cable.
1-7. SPECIFICATIONS The source can easily be changed in the field a~ Source Data using a TO-414 or TO-650 Source Changer which
,,q 9
also serves as a shipping container.
Maximum strength: 100 curies (+20%)
Shielding: Conforms to NRC requirement,
- 15. SYSTEM OPTIONAL ACCESSORIES title 10 CFR part 34.21 Table 1-1 lists the options available for both pro-
- b. Size and weight jector systems.
Projector Size: 4% x 9% x 12% inches Also available is a complete range of radiation Projector Weight: 44 pounds
, rurvey and personnel monitoring dosimeters.
Model 664 Control Unit Size: 6 S/8 x 12 x 1-6. PRINCIPLES OF OPERATION 21 inches The hand crank on the control unit moves the Model 664 Control Unit Weight: 22 pounds drive cable through the control tube. The control (with control cable) cable is locked to the encapsulated radioactive Model 693 Control Unit Weight: 19 pounds source via a short leader. Figure 13(a) shows the (with control cable) source in the stored position in the projector (hand Guide Tubes: 5 pounds cranked fully clockwise - in the full RETRACT Tripod Stand: 10 pounds position). Figure 1-3(b) shows the source being
- c. Operating Specifications moved out of the projector and into the guide Maximum distance, projector to control tubes. This action occurs by rotating the hand unit: 25 feet crank in the EXPOSE counterclockwise din:ction.
Distance, projector to exposure position: 7, f
Figure 1-3(c) shows the source reaching the snout 14.or 21 feet which serves as a mechanical stop at the radio-Source position reproducibility: 11/16 inch Table 1-1. System Options MODEL DESCRIPTION
?
I NO.
t 527 Collimator with stand for directional 600 beam or 3600 panoramic 200 wide-band beam I
653 Side collimator 654 Front collimator 534 Slide rule type exposure calculator with leather case 492D GAMMALARM radiation monitor 492E GAMMAFLASHER used with492D GAMMALARM i
Refer to section ll. Recommended safety Precautions, before operating or serv 6cing these systema.
5
a a
CAMMA RAY PEOJECTOR SYSTEMS PROJECTOR p
e EXPOSE (cQ' I,
,, SOurtCE
/
u SNOUT ORIVE CABLE
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HAND CRAN K (a) STOR E O POSITION GulOE TUBES c-
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I (b) SOURCE IN TRANSIT CONTROL CA BLE RETRACT co T-i e
v SOURCE N.
l SNOUT 4
(c) SOURCE AT RADIOGR APHIC SITE kP NT)
Figure 1-3. Mechanical Schematic.
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IWer to Sectice II. Recommended Safety Precautions, before opersting or servletas these systeens.
-.~.
s SECTION 11 RECOMMENDED SAFETY PRECAUTIONS 2-1. GENERAL 2-4.
EXPOSURE TIME The Model 660 Ray Projector is designed to Maximum radiation doses to personnel are afford operators maximum protection from radia-specified by State and Federal regulations. (See tion. However, precautions consistent with ac-Code of Federal Regulations. Title 10. Atomic ce;:ed isotope handling practices must be observed Energy Part 20.101.) Always observe good radio-at all times.
graphic techniques to keep doses to a minimurr
- 25. SHIELDING 2-2.
RADI ATION MEASURING INSTRUMENTS Wherever possible, the control unit and opera-The use of radiation measuring equipment is ting personnel should be positioned behind a mandatory; all handling of isotope units should be shield. Shielding materials commonly used to monitored by proper radiation detectors. The bsorb or stop radiation are concrete, iron, steel, following are recommended:
and lead.
- a. Survey Meters.
Survey meters must be used as a matter of rou.
2 6. HAND-CARRYING tine to determine the radiation rate per unit time.
Hand carrying should be limited to operations Technical Operations. Inc. recommends a gamma where absolutely necessary. Unnecessary personnel survey meter of the ionization chamber type, with exposures can result from hand-carrying the unit a full scale range of at least 1000 mr/hr.
for extended periods. Personnel carrying the unit should always monitor the exposure using a dosi-
- b. Film Badges.
Personnel using or working near isotope equip-meter or film badge on the part of the body nearest to the source.
ment should wear film badges to provide perma, nent running records of the radiation dosage re-2 7. SHIPPING I
The Model 660 meets the requirements for a l
- c. Pocket Dosimeters.
Type B shipping container under the regulations of
[
Technical Operations. Inc. also recommends the the U. S. Nuclear Regulatory Commission, the U. S.
use of pocket dosimeters, to allow personnel t Department of Transportation and the Internation-determine the exposure received m any given al Atomic Energy Agency. The container has been
[
period.
assigned USNRC Certificate No.9033 for domestic 2 3. WORKING DISTANCE shipments and I AEA Certificate No. USA-DOT-Every precaution should be taken to insure that RAM-6-70 for international shipments.
adequate distance exists between the exposed Under the terms of USNRC regulations in source and areas accessible to personnel. Surround-10CFR71.12(b) prior to the first shipment of the ing areas should be surveyed - any areas in which container, the shipper must register as such with l
readings are excessive should be restricted and the Transportation Branch, Division of Materials posted. (See Code of Federal Regulations, Title 10, and Fuel Cycle Facility Licensing. USNRC.
Atomic Energy, Part 20.105.) Personnel operating in shipment the device must be locked and the equipment should always work at the maximum storage plug must be inserted and secured with a possible distance from the source. (The exposure tamper proof seal.
j rate varies inversely with the square of the distance When shipped with the contained Iridiumi92, from the source.) Always avoid unnecessary or ex-the RADIOACTIVE YELLOW 111 label must be cessive dosages.
identified with " Iridium2", the number of curies Refer to Sectio II Recommended safety Precautions. before operating or servicing these systems.
7
e GAMM A R AY PROJECTOR SYSTEMS contained, and the maximum radiation level mea-RADIOACTIVE WHITE I label must be identified sured at a distance of three feet from the surface of with " Depleted Uranium" and '
CuriesJ the container (Transport Index).
These shippinglabelsare shown in Figure 21 and When shipped without the Iridiumie2 source, a are available from Technical Operations.
5 M
Y A. 44A*4 9
h, J'
~
/:::
(a) With Isotope (b) Wuthout isotope Figure 2-1. TypicalShipping Labels SECTION lil UNPACKING AND STORAGE j
- 31. INITIAL INSPECTION (b) Source Tube Clamp
{
if external damage to the shipping containers is (c) Tripod Base l
evident, ask the carrier's agent to be present when (d) Tripod Rod the system is unpacked. Technical Operations,Inc.
(e) Control Unit with attached Control Cable should be notified immediately if any components (f) Projector were damaged in transit.
(g) Three 7 foot Guide Tube Sections j
WARNING
[
UNPACK THE SYSTEM ONLY IN AREAS MON-3-3. COMPONENT INSPECTION ITORED WITH A PP R O P RI ATE RADIATION MEASURING EQUIPMENT. SEE SECTION 11.
Examine all components for damage. Check all tems against packing list or Figure 1-1.
3-2. UNPACKING 3;e. STORAGE Portable Gamma Ray Projector System Com-When storing the system between uses, keep the ponents are normally shipped in two cardboard plastic caps, supplied with the system, in place on containers. Inspect cartons for external signs of the three guide tubes. This ebminates dust accumu-possible damage. Open the cartons and remove the lation within the tubes. During storage the storage system components.
plug must be inserted to meet the conditions of The components are as follows:
10CFR34: 21 and to prevent the entry of foreign (a) Swivel Clamp material.
3 Refer to section 11. Recommeaded safety Precautions, before operstmg of servicing these systems.
l SECTION IV O PER ATION 4-1. PREPARATION FOR USE
- b. Control Unit.
- 1. Determine the operating site of the control unit. For maximum safety, the operator should be WARNING located behind a protective shield.
ASSEMBLE THE SYSTEM FOR USE ONt.Y IN AREAS MONITORED WITH APPROPRIATE
- 2. Lay out the centrol cable as straight as pos-R ADI ATION MEASURING EQUIPMENT. SEE sible directing it toward the projector. Note that 4
- SECTION ill.
the bend radius should not be less than three feet.
Smaller bend radti may restrict the movement of
- a. Guide Tube Assembly the control cable.
)
- 1. At the radiographic focal point, position NOTE and secure the snout of the master guide tube using The control cable should not be subjected to any i
the tripod stand and swivel clamps.
undue stress or abuse which could cause restrictions
- 2. Remove the plastic dust caps and attach in the cable.
additional extender guide tubes, as necessary, to
- 3. Attach the control cable to the projector in the master guide tube.
accordance with the followmg illustrated sequence:
- 3. Determine the position of the projector (source shield) allowing for maximum possible
- 3 operating shielding. Assuming appropriate shielding
'1 g
j
!.' 6'l '
- O 4 -E is available, the operator will be approximately p
twenty-five feet from the projector during actual c;-
5 1
operation.
- 4. Lay out the guide tubes as straight as pos-
~
. stonum covsi '
sible directing them toward the projector. Note
- N. f g
that the bend radius of the guide tubes should not m
'i be under twenty inches. Smaller bend radii may
{
~
2 restrict the movement of the control cable.
NOTE Q
/
(
The guide tubes should not be subsected to any un-
- J due stress or abuse which could cause restrict >ons in
.-W r.-
the tubes.
p!
3 v.
E.
- 5. Remove the storage plug from the projec-g tor connector and attach the last guide tube to the w
O.
projector (see Figure !-2).
Unlock the projector with the key provided and i
CAUTION turn the connector selector ring from the LOCK NEVER O9ERATE THE SYSTEM WITH MORE Position to the CONNECT posttron. When the ring THAN THREE GUlOE TUBE SECTIONS (INCLUD.
is in the CONNECT p >sition. the storage cover will j
ING THE MASTER).
disengage from the protector as shown.
)
Refer to section 11. Recorarmende<1 Safety Precautions. before operatirig os semmg these sy stems 9
i pay PRojtcToR SYSTEMS
..~
/
g*
L cot...
\\
1 A-Slide the control cable collar back and open the
~
4 jaws of the control cable connector. This exposes
' '?
the male position of the swivel connector as sho wn.
).
t ec. m...,
i J
4_
i L
4 tumove rm.mssa.v j
Engage the male, and female portions of the swivel connector as shown by depressing the I
spring loaded lacking pin toward the projector nmu
- K with the thumbnail. Release the locking pin and k
test that the connection has been properly made.
\\
i A
{
s i
i i
i Close the jaws of the control cable connector k
over the swivel-type connector.
1
,' a
)
f w
d 4
10 peter tn %*"#
gended %d'" P
ggg {ld h
i e
I OPE R A floN WARNING OPERATE THE SYSTEM ONLY IN AREAS l
l MONITORED WITH APPROPRI ATE RADIATION l
ME ASURING EQUIPMENT. SEE SECTION 11.
427 :
- a. Unlod the protector connestor and rotate M
the selector ring to the UI'l R \\ ll position the source is now t ree to mos e.
l NOTE If cranking becomes difficult at any time during the next step, reverse the direction of the cranking to return the source to the stored position in the projec.
l i
tor. First monitor the area with a survey meter to E
the control and guide tubes for excessively small bend insure that the source is properly stored. Then check radn and repeat the step.
g 4
b \\t the control umt i m a shielded area t ra-l
~
pidly rotate the hand crank in the EXPOSE teoun-terclockwise) direction to mose the source out of Slide the crmtrol (ahle collar orer the connector the projector and into the guide tubes toward the
{
radiographie focal point. Both the \\1odel 664 and 1
604 Control Units. shown in Figure 4-1 operate in l
similar fashion. Contmue to rotate the hand crank l
until the source reaches the snout which serves as a l
mechanical stop for the source The odometer reading will indicate the total datance the 3ource traveled (approximately sesen teet for one guide l
' ' ' N tube section. fourteen feet for two sections and l
twenty-one feet for three sectionsi
- c. Specimen exposure should be figured from the time that the source reaches the snout or stop.
- d. To return the source to the projector. af ter the desired exposure time has elap,ed rapidly turn the hand crank in the RETRACT telockwise) direc-tion. Continue to turn the crank until the odo-meter reading reaches the 000 position. (source properly stored).
CAUTION lloid the control cable collar flush against the AFTER AN EXPOSURE, THE PROJECTOR projector connector and rotate the selector ring SHOULD BE THOROUGHLY MONITORED wlTH from the CONNECT position to the LOCK posi-A SURVEY METER BEFORE CONTINUING WITH tio n.
Keep the projector in the LOCK position STEP E.
until actual operation is ready to start.
- e. At the projector, rotate the connector seleefor from the OPERATE position to the LOCK posi-tion and secure with the projector lock.
- 42. OPERATION NOTE Thoroughly check all cable connections and if the projector selector ring cannot be rotated to the bend radii and the position of the snout of the LOCK position. the source has not been fully re.
master guide tube tThis represents the radiograph-tracted. Check the controt unit odometer reading. It le local point of the source.) To operate the should be o00. Turn the hand crank to the full clock.
system perform the follow?ng:
wise (RETRACT) direction.
H efer t., set ti. n fl. Hete.mmended Safe t y Prec autions. before opera ting.w seeming these sy ste ms II
GAMMA RAY PQCUECTioN SYSTEMS 4 3. DISASSEMBLY
- c. Slide the control cable connector collar over 8
8*8Y m e pMector,
!f the system is to be moved for another expo-sure or to be stored, the components should be
- d. Open the connector jaws and disconnect the disassembled. Unscrew the guide tube sections swivel-type connector by depressing the spring-from each other and remove the master guide tube loaded locking pin towards the projector with the from the tripod stand. Place the plastic caps on the thumbnail and separating the male and female connections.
tube ends and projector connector to eliminate dust and dirt from entering the tubes. Store the NOTE tubes in an area where they will not be subjected if any difficulty is encountered, rvfer to the illue to any undue stress or abuse which could cause treted instructions given for making the coewsection restrictions. Insert storage plug into position and for further asustance tighten.
i
- e. Replace the storage cover in the projector To disconnect the control unit from the projec-connector and rotate the selector ring to the LOCK tor, perform the following:
position. Remove the key and engage the lock to
- a. Unlock the projector using the supplied key.
secure the projector.
- b. Rotate the connector selector ring from the
- f. Coil the control cable in the 664 control unit LOCK position to the CONNECT position. When or around the 693 control unit and store the unit the selector ring reaches the CONNECT position, in an area where the cable will not be subjected to i
the control cable connector will partially disengage undue stress or abuse.
from the projector.
- g. Disassemble the tripod stand for storage.
d ODOMt it a i
I 2ES*s'rt,e j
\\
i
- a%O C o as" OOOwE FE a i
\\
l l
f waa.OCeams (b)Model 693 i
'i s
(a)Model664 Figure 4-1. Control Units.
12 Refer to section 11. Recommended safety Precautions. before operating or servicing these systems.
l
SECTION V MAINTENANCE S-1. GENERAL
- 3. Pull the cable free from the control cable It is imperative that all system components be housing. Coil the cable (a radius of not less than kept clean. No amount of dirt can be considered four inches) and place the cable in a container of negligible. When the system must be operated in a degreasing solvent. Do not use water based cleaning dirty environment, particular care must be exer.
agents. Allow the cable to soak as long as is neces-cised to avoid dirt from entering the control or sary to remove all accumulated foreign matter.
, guide tubes. Dirt-clogged cables. tubes, and con-
- 4. Remove the control cable from the control nectors impede the drive cable movement and unit by loosening the two fittings. (Before remov-could cause jamming.
ing the fittings. label them to facilitate reas-
- 52. CONTROL CABLE Inspect the control cable regularly for signs of
- 5. Pour degreasing solvent into the control cable damage. Avoid twisting or bending the cable exces-tubing to clean. Continue to Dush the tubing until t
s Ivent leaving the hose is free from impurities.
sively. Recoil the control cable carefully for stor-age. Never drag the cable on the Door or ground.
- 6. Use compressed dry clean air (do not exceed Use the protective cover (over the connector) when fifteen pounds) to thoroughly dry both the hous-the control cable is not in use.
ing and cable. Any remaining solvent could causa permanent damage.
Inspect the guide tubes regularly for signs of NOTE damage. Avoid twisting or bending the tubes exces.
Since the drive cable and control tubing has been sively. Recoil the guide tubes carefully for storage.
em ufily cleaned. care must be exercised to avoid Never drag the tubes on the floor or ground. Re-
'" Y d" " d # * " "'i " * *i " d""S * * "'"* i"d"
'"d""'
place the plastic caps on the guide tubes connec-tors when not in use.
- 7. Lightly grease the drive cable with MIL G-
^ YE# E'#
E'#
'#' "'I 5-4. CLEANING AND LUBRICATING SYSTEM mpounds when exposed to radiation.
CABLES 0 rr Sive C The frequency of cleaning and lubrication de.
- 8. Carefully feed the cable into the tubing from pends on the amount and type of use. These pro.
the cable end which attaches to the projector.
c:dures should be performed whenever the crank-
- 9. When the cable reaches the control unit fit-ing of the control unit becomes difficult. Perform ting. guide the cable into the hand crank housing.
the following:
Slowly turn the hand crank in the RETRACT
- 1. Disconnect the control cable from the projec.
(clockwise) direction until the cable engages the t:r.
crank gear.
- 2. Turn the hand crank in the EXPOSE (coun.
- 10. Reconnect the two fittings which connect t;rclockwise) direction until the cable disengages the control cable to the control unit.
from the drive gear. This becomes apparent be-
!1. Turn the hand crank in the RETRACT c use further turning of the hand crank will have direction until tne cable is completely contained in no effect on the control cable.
the housing. If the odometer reading is not 000 at Refer lo Section 18. Recommended Sofety Precautions before operst6ng or servu6ng these systems.
13
G AMM A R AY PIOJECTioN SYSTE MS this time, refer to the odometer adjustment pro-A dummy source is normally supplied with the cedure given in this section.
system. A clip inside the storage cover of the pro-To clean the guide tubes, flush them thoroughly jector converter is provided for dummy source with a cleaning solvent (chlorothene or carbon storage. The dummy source can be used when the tetrachloride). Dry thoroughly with clean dry com.
radioactive source has been removed (using a pressed air. Replace all plastic dust caps when source changer) so that the control cable can be storing the tubes.
disconnected from the projector. Note that the fail-safe feature of the connector requires either a 5-5, REPLACING THE CONTROL CABLE source or a dummy source properly stored in the To replace the control cable, refer to the clean-projector before the control cable can be dis-ing procedures given in paragraph 5-4.
engaged.
5-8. CONTROL UNIT REPAIR 5-6. ODOMETER ADJUSTMENT Exploded views of both the 664 and 693 control The odometer in both the 664 and 693 control units are given in Section VI(Figures 6-3 and 6-4).
units, has a knob adjustment control. If the hand if parts must be replaced, use the index numbers of crank is in its full RETRACT position, the odo-the related illustration as a guide to disassembly meter should indicate 000. If not, slowly adjust the and reassembly. The illustrations also include a control to obtain a 000 reading. The odometer ad-parts list for ordering replacements.
justments are located in Figure 6-4 for the 693 control unit and Figure 6-3 for the 664 control unit.
5 9.
GAMMA RAY PROJECTOR WARNING THE SOURCE SHIELD PORTION OF THE PRO.
5-7. SOURCE REPLACEMENT JECTOR IS NOT REPAIRABLE IN THE FIELD. A Renewal sources are available from Technical COVER PLATE HAS BEEN ATTACHED (SEE Operations, Inc. for replacement in the field. For FIGURE 12) TO PREVENT OPENING THE instructions, see the procedure supplied with the SHIELD WHICH COULD RESULT IN A SERIOUS replacement source.
RADI ATION OVEREXPOSURE.
14 Refes to section 11 Recommended 5efety Precautions before operstmg or servwing these erstems
o SECTION VI REPLACEABLE PARTS 6-1. GENERAL 6-4.
GUIDE TUBES All parts that are replaceable in the field are The guide tubes are replaced as a complete listed and identified in this section.
assembly., Order Part Number B48906 for replacing the master guide tube (with snout) or Part Number 6-2.
G AMMA RAY PROJECTOR B48907 for replacing either of the extension guide CAUTION tu bes.
NEVER DISASSEMBLE THE PROJECTOR IN THE FIELD (SEE PARAGR APH 5 9).
Heter to Figure twl for component identifica.
6-5. CONTROL UNITS tion.
- a. Model 664 Control Unit.
efer to Rgme W.
6-3. TRIPOD STAND Refer to Figure 6 2 for component identifica.
b Model 693 Control Unit.
tion.
Refer to Figure 6-4.
'N
. % ~.u, o
..,,x
~
(
t.
/
b/'
4,4 r.
L 1
066001 Gamma Ray Proiector (cornolete) 7 B660017 Storage Cover 1 40201 7 Burret: cf amp 3
M-32 a 3/8 LG Pan Head Screw 2 40201 8 Camp holder 4
C66001 10 Nameplate 3 P/O 402019 Alumenum rod. % diameter a 32",
5 A66001 11 k ey threaded 3/8 - 16 m 5/8" 4 P/O 402019 rripod base 6
A52401 1 Storage peug 7
866001 20 Dummy Source 8
Sash cna.n. 2 %". steet / copper issi Figure 61 Gamma Ray Projector.
Figure 61 Tripod Stand.
Refer in Section ll. Hecommended safety Precautions, before operating or serviceng these systems.
15
e e
GAMMA RAY PROJECTION SYSTEMS g
30
/
14 N
m w_
Q g' 16 15 L
g.
G i
15 l
p5 1
210-32 = 1 1/4 Lg Band. Hd Screw and #10-32 Elastic Stoo Nut (4 Each 14 I
R eauiredi i
2 5/16-18 x Si8 Lg He= Md. Bolt i---
( AN 10-5) a p6 3
868901 Crank Arm Assembly 1
1 4
C689001 Controi Bow Houser.g (2 Req.)
i 5
A68900L 7 Wear Strio l
l l
6 C689049 Orive Whees 4
7 Nylon Bearing - Thomson # 12L2 FF 12 Req 1 (E525 8
A66404-1 Geer Shaft
%jgI 9
Oihre Bearing - Bost. Gear = 848 3 7
10 Dowet Pin - 3/32 Dia 5/16 Lg.
8 1
11 D664021 Frame 9
l 12 Hencal Gear - Bost. Gear
- H2410L 10
'3 B'ake Bearing - Bost. Gear 2 835-4 NNl l
14 868900-2 Cable Adapter 12 Reg i l
15 A6890G4 Brake Jaw (2 Req i 11
% -s
=
\\
]i 18 A664034 Couoting 16 A689043 Brake Arm 12 i
17 Odometer - Durant =3Y-8822-R -S-AC s
j l
19 Nylon Bearing - Thomson 24L2 FF m
(3RM) f 20 Hetical Gear - Bost. Gear f H2412L 21 A66403-3 Odometer Connecting Shatt R",
' p # **
22 866403-2 Gear Bon
[l (p
23 866403 1 Mounting Plate 24 28-32 = 3/8 Lg Bind. Hd. Screw (3 Reg i I;
j 25 2 8 -32 = 1/ 4 Lg. Band. Hd. Screw 12 Req )
22 26
- 4-40 x 1/4 Le Band. Hd. Screw t i (2 Req )
)
l I 27 Rubber Gasket - Green Rubber Co.
,/
' I9 3 GR 121 7
- 20 28 866403-5 Cover 21,
29 Roset Knob - Raytheon # 70-1-2
'8 %
43, 30 5/16 Bevet Washer i
'7
\\
- 23
(
fp-2e
,,:,-nj ;
-2>
N 2.
2.
/
24 i
N24 h
25 0 402 Fipre 6-3 Model 664 Control Unit (Revhed July I974)
Refer io section, Recomm.m sg., pro, ion, secon,,,,,,,,,,,,,g,,,,,,,,,,,,,,,,,
16
e e
REPLACE AILE PARTS 2
T T
1 210-32 a 11/4 Lg 8 ed Md Screw 34 and =10-3214 Each Required) 3 og 2
5/16-18 = 5/8 Lg Hee Hd Bolt M'-',,
l AN 10-5) 13\\g 3 868901 Crank Arm Assembly g4 q
4 C689001 Control Boa Housing Q 2 Req l
-7 5 A68900 7 Wear Strip 6 C68900L9 Orive Wheet 15 7
Nyton Searing - Thomen # 12L2 F F 16 L
4 12 Rea l C
8 A693021 Gear Shaf t
\\
9 8485 0 8 te Bearing - Bost. Gear # B46 3
+
10 -
Dowel Pers - 3/32 Dia 5/16 Lo.
11
- 8 Sheet Metal Screw 5/8 Lg. Flat I
15 [
Head 12 Req.)
- 5 12 Hetical Geer - Bost. Gear a H2410L 13 Brake Bearing - Boet Geer = 835-4 14 868900 2 Cable Adapter 12 Req 1
/
15 A689004 Brake Jaw (2 Reg I
' W.- 6 16 A68900L3 Brake Arm I4 17 C692011 Control Handle 18 869201 2 Handte Filler 19 Handte Grip Hunt Wilde # F G-1 1/4 Stock # 1856 4-w i
e 20 C69301 1 Odometer Vount 21 A693013 Window 7-a-
- 18 19 22 Counter Durant # 3Y 8822-R-AC 6
23 A693031 Odometer Drive Shaf t 8
24 Roll Pin 1/16 Die a 1/4 Lg r.
25 Grip Ring. Tru Arc #5555 25 g0 9
y (1/4 Die I (2 Reg )
Spacer Pic # 8811 (1/4 Dio. m 1/8 Lg1 26
' [<
i e
27 Helacal Gear Boston Gear # H2412L 28 Spring Washer. Shak eproof 2 3502 14 48 29 Roset Knob Raytheon # 7012 e
g
/
R,.f '
30 A693012 Odorreter Mount Cover 11 e
A,,, g a
31 8-32 a 3.'8 Lg. Bind Hd. Screw (4 Reg.)
j A
32 4-40 m 3/16 Lg. Bind Hd. Screw (2 Req )
/
s._',j s,
- 33 10-32 Locknut. Elastic Stop Nut k
- 22 NTM O2 f 4 Req.)
'W 34 5/16 8ewei Washer 35 4-40 a 1/2 LG. RD. HO Screw (2 Reg.)
17 _
e==e t
29 k
28 35 33 25
~27 20
-- 26 21 'h N
23 22
\\d
\\
24 I
30 32 l.
L 31 A l ki Figure 6-4. Model 693 Control Unit.
't Refer to Section 11. Recommended Safety Precautions, before operating or servic6ng these systems.
17
c GENERAL DESCRIPTION The Source Changer Model 650 is a portable, shielded container for transferring encapsulated radioisotope sources into radiography pro-jectors. The changer is designed to safely contain the radiographic sources during shipment and to permit field exchange of old for new sources without exposing the operator to unsafe radiation levels. The source changer has depleted uranium for shielding.
QUICK REFERENCE DATA Source Types Sealed sources (Tech / Ops sources only) isotope: Iridium 192 Radiation: Gamma rays Container capacity Iridium 192: 200 Curies + 20%
Shielding Depleted Uranium (U238). weight 35 lbs.
Housing Steel Design Type 8 Radioactive Material Shipping Container (USNRC Certificate of Com-pliance No. 9032 and I AEA Certificate of Competent Authority No. USA. DOT 5 69).
Effective radiation Well below regulatory mR/hr limits shielding prescribed in 10CFR34.21 and 49CFR393(i)
Dimensions 13% in. H X 10 in. L X 8% in. W Shipping weight 66lbs.
SHIPMENT DATA
- 1. Source decay chart and leak test certification. Keep for user's records.
- 2. Source identification (ID) plate. Affix to user's projector.
3.
Return shipping labels.
4 Tamperproof seals.
- 5. Instruction manual.
OPERATION NOTE: All the precautions used when making readiographic exposures must be followed.
Wear personnel monitoring devices during all source changing opera-tions. Monitor all operations with a calibrated, operable survey meter.
- 1. Upon receipt of the source changer, survey the source changer to ensure that the source is in the proper storage position.
2.
Locate the source changer and projector in a restricted area.
Locate the devices so as to avoid sharp bends in the guide tube or control housing.
NOT LESS TH AN i
36 INCHES 20tNCHES--f
_ _. _ S
"^^
CONTROL CABLING SOURCE CUIDE TUBE Typical Source-exchange Arrangement
- 3. Set the projector as for an exposure.
4.
Remove the cover from the source changer by breaking the seal r
wire and removing the bolts.
5.
Remove the source holddown cap by breaking the seal wire and j
unbolting.
s i
CAUTION: When the source holddown cap is removed, the source connector is exposed. Care must be taken to ensure l
the source is not dislodged when handling the changer.
I i
- 6. Connect one end of a guide tube extension to the projector and the other end to the fitting above the empty chamber in the source changer.
- 7. Close and latch the source guides.
- 8. At the projector controls, crank the source from the projector to tha source changer.
- 9. Approach the projector with the survey meter. Survey the pro-jector on all sides, survey the guide tube and survey the source chanSer on all sides to ensure the source has been properly transferred. The maximum radiation level at the source changer should be less than 200 milliroentgens per hour at contact.
- 10. Open the source guides. Disconnect the drive cable from the source assembly by moving the lock pin down and siiding the drive cable connector out through the keyway.
- 11. Disconnect the guide tube from the source changer. Connect the guide tube to the fitting above the chamber containing the new source.
- 12. Couple the drive cable to the source by depressing the lock pin, sliding the drive cable connector into the keyway, and releasing the lock pin. Test for proper engagement.
- 13. Close and latch the source guides.
- 14. At the projector controls. crank the source from the source changer to its storage position in the projector.
- 15. Approach the projector with the survey meter. Survey the projector on all sides, survey the guide tube, and survey the source changer on all sides to ensure the source has been property transferred.
- 16. Lock the projector.
- 17. Disconnect the source guide tube from the source changer.
- 18. Affix the identification plate of the new source to the projector and attach the identification plate of the old source to the source holddown cap.
- 19. Bolt the source holddown cap in place and seal wire.
- 20. Bolt the source changer cover in place and seal wire.
- 21. Survey all exterior surfaces of the source changer to ensure that the radiation level does not exceed 200 milliroentgens per hour at contact.
- 22. Measure the radiation level three feet from all exterior surf aces of the source changer and ensure that the radiation level is less than 10 milliroentgens per hot,r. The maximum radiation level measured three feet from any exterior surface is the Transport Index. (Example: With a maximum radiation level of 2.2 milliroentgens per hour, the Transport Index is 2.2.)
- 23. Complete the " RADIOACTIVE lil" shipping labels. For contents, list the radioisotope contained (tridiuw192). Indicate the activity as the number of Curies. Record the Transport index as determined above.
- 24. Apply the RADIOACTIVE lll shipping labels, properly com-j pleted, to two opposite sides of the container.
- 25. Return the container to Technical Operations Inc.
8E Propering Source Changer for Shipment i
_.. _ _ _.. _.., _. ~. - _ _ _. _ _.. _ _.. _ _ _ _ _ _ _ _ _ _.. _ _ _ _,, _ _ _ _,, _
l l
l NOTE I
Please return container promptly. Rental charges will be made for containers held beyond normal transportation time.
f t. /.
T i
i i
i A
l 6%
F Connecting' Disconnecting Testing Connection l
WARNING Do not move source assembly more than 1/2 inch from its stored position when I
connecting / disconnecting or when testing
'l for proper connection.
t TO ENGAGE CONNECTORS TO DISENGAGE CONNECTORS
- 1. With fingernail move lock pen
- 1. With fingerna ! move lock pin J
back from keyway (Pressure on pin back from keyway i
is downward toward stored position
- 2. Slide drive cable connector out of sourcel through k eyway and release pin.
j
- 2. Slide drive cable connector into s
keyed sleeve and release pin.
CAUTION p
- 3. Test connection by pulling be-Move connector sideways I
J l
tween source and drive cable (Note only. Do not bend or twist l
WARNINGJ 2
l l
I i'
t i
Figure A.
Procedure for engaging and disengaging the Model 550 i
source assembly connector Testing for proper connection must I
be performed l
I l
l Series 900 Gamma Ray Projectors 1
a l
The TechlOps Senes 900 Projectors offer new economic and safety benefits. This new design significantly extends the life of the gamma ray projector. The Model 900's are hghter in weight and smaller in size. Different size and weight models for different apphcations are available with new features for operator safety and regulatory comphance.
- d^C"'
***"'S;"***""****
oco6.ted urineum sh.eid ooes Rates weil e io.
Allowed Levels The shie8d assembly is r'gidly supported in the paqector by end plates A wear resistant tu gsten source tube is in the conter of n
the depleted uranium sNe* ding. Void space to-Visual Posittve Source Position Indicator Sect,res Sototy Lock Control Connector Sou ce rermains in tween the shold and SrWI is tilled with castable tne source automat.caay en pro;ector amen tui.y r
Sate stored posetton unt.1 a ocs.tive crcoor coro nged po8yurethane toam The mass of the sh*eid returned to storage ocs t'on Must be reset ty l
nectron 's enade Can only be Drtoer'y discen.
assu es low sur' ace dose rates weil below operator a"e' every esposwre Visually indica'es if r
ben scu :e.s satai, stored requiatory requirements source es stored at.n cpen pos t.on j
nected or conn +cted a r
I 1
1 i
l
)
1 1,....
l g.
-y
<=
I I
Straight Source Channel Tube N tungsten Front
- ear Housing Plates Fabr+catad from du abie steal eth y eid strengths to assu e and r
r i
source fute is cast nto a dep'eted u anium r
SNe'd Sheid sF ape reduces neig*t substantialty rra.etain the proisctors structu al ietegr'ty r
St arght *ru des'ga estends protector and tube h'e signif cantry l
Shell Pe 1eoie'm2 s'amum sNeid is encased in l
Storage Plug Protects 'he sou ce assembty con castabie r"pd poly;retaane and housed in a Quact olsconnect Source Tube aco*1 tor qu+c h r
1 esctor end aben not in use and **eps it and the staineese s'eae sne" prov'dieg du abil'ty and connect.on4sconn c!)on of source pode 'ut*s r
.j prolector dirt and dust t'ae strength to or t'orn prmector
,I P
l l
1
Rediation Products Division Northwest incustrial Park i
Burlington, MA 01803 USA Telephone (617) 272 2000 or Toll Free 1400-225 1383
{
l i
i The Complete System A complete Series 900 system for field or I
laboratory use includes the Gamma Ray Pro-tector, choice of pistol gnp or hand reet con-trols, control housings. Source guide tubes.
tripod and clamps. As an added feature, the stainless steet outer shell of the Series 900 GRP's has tapped holes on the bottom for easy mounting on vessel walls, Sohd plates, saddles. pipehnes or other surfaces that re.
quire a firm stationary position. The 900's low center of gravity provides additional l
Stabihty.
i i
SPECIFICATIONS:
OPTIONAL ACCESSORIES:
Standard Isotope:
Ir* max capacity for Model 900 = 100 ( + 20.) ci E Mini Colkmators Lead (PD), Tungsten (W) l ir M max capacity for Model 920 = 200 ( + 20%) ci or depleted uranium Ir* max capacity for Model 910 = 25 ( + 20%) ci Scurce assembly is T/O 90003 for Models 900 and 920; 91003 5 Combination Co"/1r* slide rule exposure for Model 910.
calculators I
Speckl isotopes:
Gamma Ray Projectors may also be used for millicurie amounts E Personnel / Laboratory and other Monitor-of Co"-piease wnte for information on other radioisotopes ing Systems -(visual, audible) l Applicatiori:
Radiography of steel from 0 5 to 2.5 in. (125 to 6.25 cm) thick.
Also hght alloys 1.5 to 7.5 inches (4 to 19 cm) thick.
E Special Source Pos4tioning and Centering i
I Devices Pipeline, Aircraft, etc.
I Shielding:
Model 9(X) 28 lbs. (12.7 kg) of depleted uranium Model 920 - 31 lbs. (14.0 kg) of depleted uranium E Special Purpose Accessories for different Model 910 18 lbs. ( 8.2 kg) of depleted uranium field and laboratory applications Approvals Certification:
Meets all IAEA, USNRC, US DOT and ISO 3999 requirements for Type B(U) packaging and class P conta.ners. Certification and j
approva's provided upon request.
I Control Cable and Standard Control Cable length is 25 ft. (7 6ml: longer / shorter Source Travel Lengths:
lengths available upon request. Standard source travel up to 21 ft. (6 4m); longer / shorter lengths available upon request.
Ctmensions/ Weights:
Gamma Ray Projector length 12.25 in.
(311 mm) height 7.75 in.
(197 mm) width 5 25 in.
(133 mm) weight Model 900 44 lbs.(20 kg)
Model 920 47 lbs(21.4 kg) 4 Model 910 34 lbs (15.5 kg) 664G Control Aeel length 21 in.
(533 mm) width 12in.
(305 mm) height 6.6 in.
(168 mm) weight 22lbs.
( 10 kg) 693G Control Pistol Grip weight 19lbs.
(8 6 kg)
Source Guide Tubes 3 seven foot lengths 12.1m) weight 5 lbs (2.3 kg)
Tripod Stand weight 10 lbs.
(4 6 kg; height 24in.
(600 cm)
C u a Sezesarroce Tech, ops Ltd Aadiet.ori P*oducis O.es.ori Umt 1 Wm.i.ortri Road Armstro<g :rtstr.at Esta'e Washington fr e & Wear NE 37 IPP ENGL ANO e
em+ee,eis fe.
e
- tn n-~
Source Assembly Models 848,866 N:w from Techlops are the Models 843 and 866 source assemblies for Gamma Industries (Century S SA, and Models 35S, SA) Gutt Nuclear (20 V) Automa-tion Industries (520) and SPEC (2T)
Exposure Devices.
1 (c) l Y
I l
M.T!K" l
tap (b)
Y Y
High grede Teleties (N
Fiesible Carbon Steel Y
V y
Closeup of New Improved Connector Nsw Pigtail Concept (a)
Capsule Assembly (c)
Precision Source Assembly Tech / Ops introduces a smoother, more A stainless steel Capsule, hermetically The soG.'Ce assembly Consists of a resilient pigtail of sapenor quality.
sealed by TIG Fusion Welding. The cap-hermetically sealed capsu!e, containing Made of highly flexible carbon steel, sule joint is precision ground and at the isotope, stain 4ss steel stop ball, this pigtail is smoother to reduce un-TechlOps every capsule is checked to and connector which are attached to a necessary tube wear in tighter *S*
confirm that the wall thickness is specified length of pigtail at critical design exposure devices. Though more perfectly uniform.
pressures to insure overall safety.
flexible, pigtails of this material have Materials, tolerances, manufacturing proven to be stronger than the standard Stop Ball (d) processes and quality control in cables, having withstood pull tests of Precisln dnlled, stainless steel for manufacturing are unparalleled in in-over 200 lbs. - well above the tension longer ervice life insures absolute dustry. Bargain imitations of the overall applied under operating conditions.
Laboratory tests have included full positional accuracy for source storage.
Tech / Ops design offer a poor com-The ba!! is swaged at 4,000 psi in three pr mise on durability and safety.
Cycling these pigtails in excess of places a7d must be within.005 inch of All Tech / Ops source capsules meet the 100,000 crankouts.
specified position on the pigtail. Imita-I.A.E.A. and (JSNRC requirements of tions of this stop ball do not match "Special Form
- which means they have N:w Design...
Tech / Ops' critical tolerances that are passed rigorous tests that prove encap.
Improved Connector (b) essential to the safe operation of sulation integnty. All source capsules Designed as an improvement over equipment.
meet or exceed ANSI N542 and ISO presently available connectors, this in-2919 requirements.
novative advancement has met safety, d:pendability, ease of source changing, Drive esble connector will be provided and projector life criteria. Manufactured and swaged on to your cable at no to critical dimensional tolerances and charge.
made of heat treated 4130 steel casting, it is capable of withstanding the demands of ngorous use.
Radicts:n Products Division Northw;st industnti P;rk Burlington, MA 01803 tJSA Tci;phona (617) 272 2000 or Toll Free 1 400 225-1383 Activity "A cude is not a curie At TechlOps you get OUTPUT -
Specific activity - This is the ratio of is not a curie" not just curies.
'ntrinsic activity of a sample to its mass expressed in units of cunes per The retivity of a radiographic source is Tech / Ops tridium'" sources will meet gram. For tridium'n, a desired specific defined by measunng the radiation ex-all your radiographic and code needs.
activity is more than 600 cunes per posure rate at a specific distance from We make sources from less than one gram; for Cc; alt *C it is 400 curies per the source and using a conversion con-cune to several hundred cunes and gram. A typical 100 curie Iridium'n stint to express this value in curies.
sources as small as 0.02 in. (0.5 mm) source may be.107* x.102* (or less) or Some of the gamma rays which are in diameter.
.107* x.129*. As the radioactive mater-emitted by the radioactive source are ial decays, more of it must be used to absorbed in the radioactive material Focal Spot provide the same amount of activity, itself and in the walls of the source The detail sensitivity of a radiograph is leading to increased focal spot size, cfpsule.The self absorption of a a function of the geometric unsharp-typice.J 100 curie Iridium'," source is ap-ness. Codes and standards place re-Construction - All Tech / Ops Iridium'M proximately 27%. Thus, en order to get quirements on allowable geometric un-sources are constructed frem identical a 100 " effective curie" source we must sharpness for certain radiographic size material. Some suppliers have lord the capsule with approximately techniques. One parameter which is been known to mix different dimen-138 Ectual or " disintegration" cunes.
necessary for determining the sional matenal and cause the source to Thirtyeght curies are lost in self-geometric unsharpness is the actual lose its geometric dimensional integri-absorption! A common symptom of an focal size of the source. This is defined ty. TechiOps has developed a simple inadequately 1,oaded source is the in.
as the maximum dimension across the radiographic technique which can verify ability to obtain the required, film densi-source in the plane of interest. The ac.
true size (and shape) to meet code and ty when all of the radiographic tual focal size of a gamma radiography product liability standards. Besides pirrmeters have been met. TechlOps souce is dependent upon:
uniform dimensions of the radioactive uses a specific gamma ray constant of material, TechlOps insures the focal The activity of the source spot and shape via precision machined 0.55 RHM (Roentgen per nr per curie at e
on3 meter). Other suppliers have pro-
- The specific activity of the radioac-source cavities as well as springs to vided sources measuring as low as 0.39 tive matenal maintain proper dimensional form in RHM, which means that these sources
. The method of construction the fabncation of the source capsule.
ara 40% lower in intensity. Thus, other suppliers sources labeled at 100 curies mry actually be as low as 70 curies in t rms of Tech / Ops curies. The USNRC suggIsted gamma ray constant is 0.55 RHM/ curies and is the TechlOps standard!
u a sates crrace recm,oos tro natar.on prooms o...s.on un.r i wn.e. orth Road Armstrong teovstric Esta'e wasm.ngton r ae & Weer P.E F iPP ENG ANC e
l g
Source Assembly T/O Ir"'/Co*
- and Cobalt" - Industrial Radiography sources A close look at a Tech / Ops source assembly Focal Soot TeCM Ces witi venry !Pe focal sect Assembly The Cacsule stop 0all and Connector Connector TNs cafeated umque Connector, made dirrenseoris that are required in Code *orti via a are attached to a specified ie"Gtn of Telef'en pig-of Cert'fied Grace steei marcened to a specified i
seraDf e r3$oQr30PfC *echnique that you Can per-tail at Cntical pressures to i"su e overall sa'ety ROCh aeli nar: ness is man 'acturad to Cntical r
u
(
'Orm in your o*9 :aDoratory C*easional stacihty Vatenals. toleramCes. manufactunnQ CroCesses
@meassonal tolerances and has the Dest record l
is gua 39 teed and quahty contros in manuf actunng are u -
- cr sa'ety and near esistance in the radiograpNC n
Caralleled in endustry Bargain imitations of the ndustry The force Cf tme stainless steel plunger e
Overail TechioCs des'Qn Cffer a poor Compromise scrinQ is Controlled to fractions of Art ounce. The I
on duraDihty and safety Corrector is attaC*ed to !*e DiQta'l under 4 000 Oss saaq'ng pressure Q'vi"q the assembly unmat.
I CPed afstegrity i
\\
Pigtall Caosuie assemoly,s a" ached to the Te:ePen ' Digta.1" by precision le seapq 4t over 1000 osi The bcnd is =uit tested at 75 'es. a ten-Stop Ball Precis.on ? ed aavat tronze (sta.nless srCa NQ*9er taa' anat 's acDhed u der oDerating steel for Cobait for i0ager se'vice det ensu es 40-n r
C0attrons The %gh grace feiehes CADie has pro-so'u'e Dositicoai ACC/acy 'Or sour:e stora;e The Capsule Assefebly A sta eiess stew Ca0sule aa itsed over t*e years to be mCst du able aad tail ts s* aged at a XC :si a three :taCes and r
- er*"et CaFy seadad tv TIG %s.ca weeng The not 'o Coracro-se on sa'ety Coracetitive '
- r%st be *.tNr' 005.a:a of sceCJ ed oCs.t>on on Ca0sWe to6f't is ects on grCund aac at TeCNOcs CCst m :t.6sament air:laae cas e coes not a;.
t*e c+gta!! Imitat ons o' t*is s?0c ta i do rot u
every CaOsu'e is reaved to COnhrm t*at the *all Oroach Te'ef'es on Cor* Dress.ve strength and Can r"atCh TeCNO:s Cnt Ca' !>e'a*Ces t*at are tNChaess :s Der'ec"y und3rm easJy frar and O s!or!.
essential to the sa'e ;; era! ca of e% pmeat Our commitment to you! -
Cobalt" high Quality Assurance specific activity spherical sources
.g E The source capsule weld:ng system is an Not all Cobalt" sources are constructed the F
automatic Tu gsten inert Gas process same way - Cobatt* sources are generally n
I arth argon purge. flow rate. we. ding assembled from 1 mm diameter by 1 mrr speed and post flow precrogrammed and hign cylindrical cocait pellets. The activity automatically Controtted from outside the per unit volume. *F#Ch determires focal loading cell.
spot size, is propor*ional to the effective E To assure proper weid perietration the density of the metal in the capsule. Com-Capsule is subjected to a proprietary NOT petitrve jumble pac =ed sources have a much l
technique to assure a properly sealed lower effective deasily than Tech / Ops high y
source In addition, all Tech, Ops sources d'nS'ty Cobalt" spherical sources which are i
1
)r have been approved by tre IAEA for spec-compression fired ial form and have met ANSI classification D
L tests.
j TochtOps trW source 3 A vacuum bubble leak test is performed
~ jP C7
- verified foCat spot and 0 55 PHv'Cune output' by immersing the source capsule in iso.
P propanol, reducing the pressure to 380mm
- p(
of mercury and observing for bubbles Ac-ceptabihty is determined by the absence
- h of Dubbles emerging from a capsule f'
5 The source capsule is then placed in a M
le
)
swaging fixture and the source pigtailis inserted into the capsule A test pull of 75 lv e=
lbs. is apphed between source capsule j
and connector i
5 Each source Tech / Ops manufactures is I
subiected to a series of Quakty inspection tests that include several wipe tests with 3
an acceptab,hty hmit of 0 0005 microcune tuSA legal hmit is 0 005 microcurie) a I
significantly more demanding standard is
(
l self. imposed for Techions manufactured k #
I sources' poistive see of Cocait peilets Sargain source sess output and more spot' i
o__.._-
Radiation Pr ucts Div sion Northwest industrial Park Burlington. MA 01803 US A Tetephone 1617) 272-2000 or Toli Free 1 800-225-1383 I
TechlOps high specific activity spherical Cobalt" sources Tech / Ops Cobait" sources are fabricated g
using a proprietary " fusion < ompressed pellet" technique where the cobalt pellets are deformed to conform to the snape of the sources
- spherical capsule This process has an effective density as high as 90'Je of the density of the coca!t metal. All TechOps doubly encapsulated Cobatt" sources are made via this compression technique This provides a Considerably higher activity with smaller focal spot s+2e. resulting in savings l
of hundreds and perhaps thousands of dol-i g
^
lars in radiography esposure time alone Compet<tive sou ces are 'abricated by lum-
^
r l
Tech'ocs high specific activity sonencal Coso source Jumble pacted pellet Co* source bie pacmir'g" where cecalt peilets are ore act'vt, aM Sm a e' SW els 4 ' v'ty AN a';e' 'Oca. SOCf random!y oriented in the source Capsu'e 19 this fabrication method the effective dens.ty I
of the active volume of the source is approx.
a18"
- 0.24" imateiy e. of the de%'ty of tne cocait s/
m etal.
A "Jurrbie packed" 100 curie cobalt source l
/
f usarig peilets with a specific actmty of 400 s
-~]
Curies per gram has a focal slZe approxim-l p
/
1,
/
O19"
''Y 3 . rarger inan tne focai size of ene j
'4 0 l a- -
i compressed spnericai source in radiograpn-i 3
~-
A ing a 3 thick subject at the minimum A.
g_-1 6
source to subiect cfstance that will sat!sfy ASME code recuirements for geometric ur'-
~ 0.19" sharoness. tne exposure time for the "jum-0.15"
~
bte pacned" source is 65% longer than for
[
the Compressed pellet sourcel TECH ' OPS COMP AESSED JUMBLE PACKED ^
TechlOps high specific actmty spherical PELLET SOU AC E SOURCE Co'C sources from 1 to 1000 curies have V!NtYUM SOURCE more output and smauer focal spots' TO SUBJECT OISTANCE 19 INCHES 24 INCHES er i
D
=
i U-Y:NIVUM SOU ACE TO FILV DISTANCE 2t INCHES 27 INCHES 0, = D s - T l
PELATIVE EXPOSUAE TIME 1 00 1 65
(
T.
iD.P
(
T]
- 6,M I
i Cor par' son of Coce:S somes for ratogracey of 3 inca ".cn s.trect w tm geetnc unsharpness SQual f 3 0 33 inCn I
i i
l 1
I l
l a % es >rtce s
'e-m r] f g L.f rj AA43' e F * ? d.1 % },. ),<>rt Umf 1 A P.t e -
- J.e? a nWr )r g f mf,it' 4 E s'i'a hasning'o,* r,e
& **ar NE17ipp E ".G t. A N O
=
as
.6
c l
COU series Gamma Ray Projectors The Tech. Ops COU series are field-The systems have maximum capacities of Low Surface Radiation proven gamma radiography systems
- 10. 30.100 and 300 cunes of Cobait~ re-Well below the maximum allowed under using Cobalt ~. All components of the spectNety 1.A E A. & USNRC regulations systems have been developed to pro-vida safe reliable service and long life The 360" panorams radiation pattem may Remote Control under the harsh conditions of industrial be used to full advantage either for multiple Long cables aHow the operator to control the source at a distance of 25 feet. When use.
j Specimen work or for circumferential expo-the source is at the focal point, the con-sure techniques trol can be at a distance of 46 feet. Extra Description tength controls and source guide tubes i
l Features are available on spec:ai order.
The COU senes of gamma ray protectors l
was developed to fulfill the need for radio-Capacity Ease of Positioning graphic systems that combired the hshly Ma.ximurr capacities of 10. 30.100 or 300 The source can easily be positioned at penetrative radiation from Cobalt ~' w'th the cunes, dependent upon projector model the required focal point by means of guide mobility aMorded by uranium shielding All modets t'ay be shipped loaded under tubes and a tnpod stand Exposure end Heavy section radiography in the she; and i A E A aad USNRC transport regulations of guide tube will pass through a 2 cm field is greatly facilitated by th s series of tar eter hole protectors. The durable case was de' Self Contained sgned to ease ngging operations and to No extemai cower sxply is recsred Reliability resist the hard krocks typcal of industria!
The system is des gned to operate with ose.
a minimum of maintenance Safety All four models are identical except for The source cannot be exposed until a Panoramic or Directional Beam capacity and size. and conver ently use precer connection to tne control cable Optional colkmators quickly convert the the same m!erchangeab e cenzois, source
,s made The unit cannot be locked nor 360 beam into a direct enal beam.
tubes and accessones can the contrei cable be disconnected urt:1 the source is completely retracted Ease of Rigging to the stored posit.on The keyccerated Large coen:ngs on botn ends of tne frarre loca prevents use by unaumonzed provide maximum fienctity when hoisting pe' sons Projector The protector. or storage container. con-srsts of a steel housmg which contains a radiat'on shield of dep!eted uranium The control connector is located on one end plate of the projector witn OPER.
ATE LOCK and CONNECT positions for connection to the control deoce The con-trol connector also incorporates a key-coerated lock which restricts the oper-
=
atron of the projector to authon2ed per.
sonnel The other end plate houses the 0'4 guide tube connector When the pro-jector is in shipment or storage, a metal shipping plug is fitted to the guide tube connector.
Model 676 on car' T0-706) i i
A.4 e,&
~~ A~.,
i S,,,
A.4 a
Model 741 Model 684 Model 680
-v
.n--
.--r
--,nne,
Radiation Products Divisisn
]
[
Northwzst Industrial Park Burhngton. MA 01803 USA Tcitphona (617) 272 2000 or Toll Free 1 800-225-1383 1
Control Units Source Assembly 1
TO-664 Reel consLsts of a control panel The source assembly consists of a her-built into a hghtveeight welded tubular cable metically seated capsule containing the reet and contains a handcrank to propel isotope attached to a leader cable. The the source to the exposure position and opposite end of the 'eader cable nas a back, and a source position indicating connector for positive attachment to the odometer calibrated in feet & inches.
source dnve cable The source capsules meet the LA.E. A. and TO-693 Pistol gno consists of a lignt-USNRC requirements of "Special Form".
wegnt housing containing the handcrank which means they have passed ngorous cou.uafons rues a Towsst and source position indicating odometer tests that prove the.ntegnty of the encap-as incorporated in the TO-664 Reel sulation.
'TO-527 Ct.Amator with stand for directonal Nam The teflon-lined control cable consists of or 2 pan oc b an outer sheatn of flexible metal com-T0 719 Oepleted Uranium Colhmator with posite cable 25 feet long witn a bngnt
.nserts for direcnonal or panoramic ye!Iow polyvinyl cover and an inner soiral-
,,,,ography (includes Labstand) wound flexible steel dnve wire. Source TO-613 Saout Switch used with tne TO-681 guide tube cons 2sts of three sections of Source Position Indic.ator. This 7 foot flexible stainless steel cable with
, protect:ve polyunyl covenng whien can be
$m d pass %gn a 3 cm used in 7.14,21 foot lengths. The end TO-534 Combination Co" fr'" shde rule section is fitted witn a stop for positme source location. Both the control cable type exposure calculator with and the source guide tubes can be stored Optional Accessories lea Per case on the control reel.
- TO-6a 1 Source Position Indicator used in conjunction with 70-527 Collimator or the T0-613 Snout Switen This N
umt provides a visual segnal to
/,
irccate the source tully estended position.
/
TO 7C4 Can for Modeis. 684 680. 676 and I41 protectors
- n
- NO rE 70 ce*nt f.,n 21 foot travet of the source.
- - ~
an anicna sect.on ot gu.de tuce B 499C7 fo4s3 P stoL Ga,* a%3 f 046a stEL Cos*nCLs sou8CE pos' 0% iN0ica*0 8 fo 64 *
- ssp ce suas?fdred 'or fFe source stoo sectort
" efac Verne Ordering information:
Specifications huma eats Dimension s:
Easvaivars maw psaan inWacmc W W D isotope:
Ceca t**
Voce 684 Sa=eid Asse~"",
ea,+ source,s we to io c.,ur es c&,
Leeg!" t 7 ecaes J3 c~
- p.,,..tr.,
,ye, een 3, sog:
Ccpacity:
Voces 684 to nres W et-13.nc es JJ c'
- .co Nees tacoc a-d covae; 9'2.acaes 24 c-astr. ct,ons
"9.q" t 225 pou ds 732 3 rg
'oss44 s3 same as aoove es:eot ae o s.or gr'c Modei741 30 %res We n
Modei 680 too cur es VOdes 741 $ateld Asse*ony 3r VCdei 68a A 424-t $
$ mice Assemesy 8
Lengin 19 stiCnes J9 cm
" 5" A; plication: Aadiograchy of steet from Widt-14 incaos 36 cm t to 7 tmek 25 to 775 mm He' gat to i <ncees 26 6 cm ton t w pm r e,, g,,.c e ',o,r co-re L.gnt aitoys 3 to t 5 meca 75 to 375 mm We. gat 300 pounds f36
=g eg
,c 3a e,n ca.
0** "'"' NC' CC""* " C' Vocei 680 Sn.eid AssemD'y S*d' 'C " * * *'d C#'M Shielding Cecieted Uramum metal t,ng i21 ncmes 53 c at
'n'WC" Cterial:
Modet 684 150 to w aaic 68 kg we-- 14 3 a,nenes 33 c -,
r fo741-6s3 same as accre enect +m as'on Modei741 200 so u amum 3t ng se. gat 11a sincres 30 cm r
W C0""*
Vocei 680 26510 uram m f 30 mg we, gat 40$ pounds t94
.g u
A424-t e source assemoe, 'or vooc 741 Modei 676 370 iD u aa.um f 68 ug r
s stem Yode 676 Smeld Assemony r
Da,,?",so,urc,es, u,,o, o'C
- * * * ' Y ^*'*'***1'*0" t cstions: U S R
, ce,0,,c,ur es c,
!0 He.gnt 144 inches 36 8 cat requiremeats for Type 8 g
g g
jg
,oo,e p,
n, CaCh aging gAe ryces it.poq and Coeratir'g Control 664 Aeet
.astoctoas IAEA USNAC Lengm 21.nches 53 3 cm 706404s3 same as aeove e ceor em o.sne Modei 684 USA /9028/B(U)T USA /9028/BfUL w,dtn 12 incees 30$cm ro coat 4 1
Medei 741 USA /9027/8(U)T USA /9o27<8 tut we.gnt 6 625 inenes t6 8 cm A 424-14 Sovice asserno<, 'or vocei 680 l
Modee 680 USA 9035/0(U)T USA /9035 B(U) we. gat 22 pou ds
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Modei676 USA 9029 Otu)T USA /9029 B(U)
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4424-13 Source asse=0s, for Modei 6?6 1, g rem U M Sates olesce Tsch 905 Ltd Aad>a' on prohcts o e.s oa umt I wNeworta Acad Arrmtroag sq. stria' E state *ase agua 'rae & hear NE 37 ipp ENGL ANo
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THE 20 V CAMERA i
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PROGRESS is a simple word to describe engmeering advancement in the field of gamma
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radiography. The Model 20V represents major progress in the design and durability of cameras for gamma radiography, i
This light weight uranium shielded camera features a rectangular shape permitting multiple operating positions, stainless steel sleeves to decrease the wear on the zircalloy S tube and a solid aluminum balanced handle bar. This unit has been designed to accept existing pigtail type sources and will adapt to some existing equipment.
The camera has endured an extensive field testing program to insure the advanced design of the
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20V against standard defects and to make sure that it will stand up against the problems en.
countered in normal operations. The 20V operates smoother and with less wear than comparable j
competitive equipment.
Designed for 100 curies of Iridium-192 the camera has profiled showing less radiation than com-petitive cameras.
For more information on progress, safety and economy see the reverse side of this sheet.
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l OPERATING PROCE E EES MANUAL GULF NUCLEAR,INC.
P. O. BOX 58866 HOUSTON, T.EXAS 77058 PHON E(713) 332 3581
SPECIFICATION SHEET MODEL 20V CRANKOUT TYPE CAMERA 1
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Size: 9%" High x 6* Deep x 4%" Wide Color: Black Case: Machined Aluminum Pigtail: NEEl MODEL RG-13 Normal Supply: With 25 ft. Crank Assembly and 15 ft. plastic source tube RADIATION PROFILES L
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A 13 Sources are field changeable.
A license is required for possession of this camera.
Specify NEEl Model 20V Camera. Model RG.13 Source and a Model RC.6C or Model U-110 Source l
Changers for licensing purposes.
For more information phone or write:
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GULF NUCLEAR,INC.
l P. O. BOX 58868 HOUSTON, TEXAS 77058 PHONE (713) 332 3581 L
SPECIFICATION SHEET MODEL 40V CRANKOUT TYPE CAMERA 1
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Size: 9 3/8" High x 6' Deep x 4 3/4" Wide Color: Black Case: Machined Aluminum Plgtall: NEEl Model RG 13 Normal Supply: With 50 f t. Crank Assembly and 14 f t. brass source tube RADIATION PROFILES w
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Sources are fleid changsable.
A lic nse is required for possession of this camera.
Sp:cify GNI Model 40V Camera. Model RG.13 Source and L Model U.110 Source Changer for lic nsing purposes.
For move Information phone or write:
GULF NUCLEAR, INC.
P. O. Box 58866 HOUSTON, TEXAS 77058 ou n ye,7,,i1,9, w
GULF NUCLEAR, INC.
MODEL 20V EXPOSURE DEVICE GENERAL DESCRIPTION The Gulf Nuclear, Inc. Model 20V camera is a crank out type exposure device used for making radiographs.
The device is designed for Iridium-192 sources containing a maximum of 120 curies.
The 20V is operated manually by turning a crank which drives the Iridium-192 source out of the shielded posi-tion into an exposure tube which has been positioned over the specimen to be radiographed.
After a predetermined time the source is retracted to the shielded position with the crank and drive cable.
PHYSICAL DESCRIPTION 20V CAMERA (SHIELD)-The 20V camera is rectangular in shape with overall dimensions of 6" x 4-3/4" x 9-3/8". _
The shield is thirty (30) pounds of depleted uranium which is formed around a metal "S"
tube.
The outer housing is 1/8" aluminum and all void spaces between the shield and outer housing is filled with epoxy.
Both the drive cable connector and the exposure tube connector are stainless steel.
CRANK ASSEMBLY-This assembly consists of a stainless steel gear box, an aluminum drive gear, an aluminum pistol grip and crank handle.
The drive cable and conduits are manufac-tured by Teleflex.
The conduits are twenty-five feet long.
EXPOSURE TUBE-The exposure tube is plastic with brass fittings and is twenty-two feet long.
RADIOACTIVE SOURCE ASSEMBLY-The radioactive source is the most vital component in the system.
The 20V requires the Gulf l
Nuclear, Inc. Model RG-13 source.
The source material is con-l tained in a stainless steel capsule firmly attached to one end of a leader cable (pigtail).
The source can easily be changed in the field with the Gulf Nuclear, Inc. Model U-110 exchangers.
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SAFETY PRECAUTIONS Operation and safety precautions must be in accordance with the regulations set forth by the regulatory agency under which the radioactive material'is licensed.
PERSONNEL MONITORING-These requirements are set forth by the regulatory agency and must be strictly adhered to.
WORKING DISTANCE-Every precaution should be taken to insure that adequate distance exists between the exposed source and areas accessible to personnel.
Surrounding areas should be surveyed and if readings are in excess of 2 mrem / hour, the areas should be restricted and posted.
Personnel operating the 20V should always work at the maximum possible distance from the source. (The exposure rate varies inversely with the square of the distance from the source.)
EXAMPLE-If the radiation survey meter indicates a dose rate of 200 mR/hr at a distance of 10 feet from the source, the reading at 20 feet will be approximately 50 mR/hr.
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SHIELDING-If possible, the exposed source should be positioned behind shielding materials such as concrete walls, steel beams, etc.
This will greatly reduce the accumulated dose to opera--
ting personnel.
OPERATION i
1.
Remove safety plug from exposure tube side of camera and attach exposure tube.
Position end of exposure tube at radiographic focal point.
2.
Avoid sharp bends (bend radius of less than 20 inches) in the exposure tube.
Sharp bends will restrict movement of control cable.
3.
Remove dust cover from lock block and connect drive cable to source pigtail.
Connect drive cable conduit to camera.
4.
Unlock the 20V.
Lock will snap up when unlocked.
The source is ready to be cranked out of the camera into S.
the exposure tube.
NOTE:
Make sure that all personnel have cleared the exposure area and that the radiation survey instrument is ON and is operating.
6.
Turn crank handle clockwise to drive the source from the camera into the exposure tube.
7.
Specimen exposure should be calculated from the time that the source reaches the end of the exposure tube.
8.
After the desired exposure time, turn handle counterclock-wise rapidly to return source to the camera.
Monitor area immediately with the radiation survey meter.
9.
If meter shows that the source has been safely stored, depress lock to lock source in position.
10.
Disconnect drive cable conduit and disconnect drive cable from source pigtail.
Install dust cover, 11.
Disconnect exposure tube and install safety plug.
12.
The camera is now ready to be moved to next location.
MAINTENANCE The 20V should be returned to Gulf Nuclear, Inc., 202 Medical Center Boulevard, Webster, Texas for all maintenance and re-pairs.
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CONTROL CRANK ASSEMBLY t
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i The Model A-33-32 Control Conduit Assembly features the Model A-32 pistol grip j
assembly with stainless steel gearbox and roller bearing crank. This assembly is the most l
1 modarn long lasting assembly to be introduced into the industry. We also permit the op-j i
tion of nylon conduit versus stainless steel. The nylon does not have the steel support in I
the conduit.
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NU EONNTu" For more information phone or write GULF NUCLEAR, INC.
P. O. BOX 58866 HOUSTON, TEXAS 77058 PHONE (713) 332 3581
1 MSDEL A-28 SOURCE TUBE ft.~;;,w"*
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This nylon source tube is a replacement for the old brass laced type which is no longer available. The standard length is 23 feet. The fittings are brass.
RC-6C Shipping U-110 Shipping Container Container iiiTi-r;
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source shipments.
Like the 6C this unit is completely safe.
All NEEI shipping containers have been approved by the licensing authority. The units are shipped with a source and connecting changer tube for adapting to your camera.
For more information phone or write GULF NUCLEAR,INC.
P. O. BOX 58866 HOUSTON, TEXAS 77058 I
PHON E (713) 332 3581 1
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