PPM-27G - Technical Associates

PPM-27G - Technical Associates
FAST, ULTRA-SENSITIVE PORTAL MONITOR
MODEL # PPM-27G
FEATURES:
FULL DYNAMIC BACKGROUND SUBTRACT
OUTSTANDING SENSITIVITY TO FISSION
PRODUCTS SPECTRUM
ADVANCED N OF 8 DESIGN
8 CHANNELS OF COUNTING ELECTRONICS
AUDIO AND VISUAL RADIATION ALARMS
HIGH BACKGROUND ALARM
LOSS OF SIGNAL LIGHTS
FAST FLOW THROUGH OF PEOPLE
EASY TO READ ALARM PANEL FOR MOUNTING
ON WALL OR PORTAL
WEATHER RESISTANT PORTAL AND FOOT DECK
CHOICE OF PORTAL FRAMES
APPLICATION: The PPM-2/G examines people from head
to toe for radioactive contamination. If placed within a
passageway. a large throughput can be attained with a
minimum amount of supervision.
DESCRIPTION: The PPM-27G consists of a walk through
portal frame and separate table top, (also rack mountable)
electronics. A cabinet to hold electronics and counting gas
bottle is optional. Nine, fourteen, or twenty-four gas flow
radiation detectors (depending upon choice of frame) and
one motion detector, sense contamination on a person as
he crosses the threshold. The radiation detectors are
grouped into eight separate channels. This feature makes it
easier to locate and remove contamination, and increases
sensitivity by lowering the background count per channel.
TA
Figure 1: F-36 (top left),
F-25A (top right), Alarm panel (bottom).
TECHNICAL ASSOCIATES
7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103
$Revision: 1.2 $
1
FAST, ULTRA-SENSITIVE PORTAL MONITOR
MODEL # PPM-27G
When unoccupied, the PPM-27G averages background radiation over 20 second interval. A first-in-first-out shift register
updates the background data every 0.2 seconds. When the portal is occupied the electronics com-pare the background
plus 1, 1.4, or 2 times the background s standard deviation, to the personnel count. This comparison is made every 50,
100, or 200 milliseconds depending upon the setting of the front panel sample time switch. The level of confidence (
N of 8 ) can be set for each channel using the eight position switches on the electronics console. Separate alarms are
provided for each channel.
SPECIFICATIONS:
SENSITIVITY:
FOR LARGER PORTAL FRAMES, F-36 and F-X3:
40 nCi Cs-137 Beta is detected with 95% confidence in 0.4 sec. (It also meets DOE
& NRC specifications. NRC requires detection of gr. plutonium, 3 mm brass shield,
90% confidence, false alarm rate less than 0.1%, and detection of 3 gm U-235, 20%
enriched, 3 mm brass shield, 50% confidence, false alarm rate less than 0.1 %.) FOR
LIGHTER PORTAL FRAME, F-25: 80 nCi Cs-137 is detected with 95% confidence in
0.4 sec.
GAS FLOW DETECTORS:
Model:PPG-41. Optionally, PPG-41T for enhanced gamma sensitivity.
Sensitivity:
20% of 4 pi Cs-i 37 betas. Detectors can detect lower energy betas down to .05 MeV.
Sensitive area:
400 square centimeters per detector.
Operating Voltage:
Typically 1900 V with P-10 gas or 2800 V (optional) with Propane.
Window Thickness:
5 mg/cm (other thicknesses optional).
ELECTRONICS CHASSIS:
Front Panel Controls:
TA
Sigma Multiplier (each channel): 1, 1.4, 2.
N of 8 Alarm Set (each channel): 1, 2, 3, 4, 5, 6, 7, 8.
Sample Time: 50, 100, 200 milliseconds.
Overflow Alarm (for background): 10, 20, 40, 80.
Reset push button
Alarm Disable
TECHNICAL ASSOCIATES
7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103
$Revision: 1.2 $
2
FAST, ULTRA-SENSITIVE PORTAL MONITOR
MODEL # PPM-27G
Rear Panel Controls:
Power on-off
High Voltage Adjust: 0-2000 V for P-10 or Geiger gas
(0-3000 V for propane optional)
Front Panel Indicators:
Average Background Display (each channel): Two digits.N of 8 Display (each channel): one digit. Contamination Alarm LED (each channel): red. No Signal Alarm LED
(each channel): yellow.
Rear Panel Indicators:
Power on/off lamp: red High Voltage Meter, 0-2000 volts, (0-3000V optional)
Rear Panel Outputs:
Remote Alarm Output Terminals (each channel plus common bell and lamp) Switched
AC outlet
Common Alarms
Indicating Contamination:
2000 Hz alarm and flashing red beacon.
Power Requirements:
110 V, 60 Hz, 1 A (220 V and 50 Hz optional)
Dimensions:
19"W x 20"D x 11"H
Weight:
45 lbs.
Shipping Weight:
65 lbs.
ALARM PANEL:
Wall mountable, silhouette with lights indicating location of contamination, plus sonalert
and flashing red light.
GAS FLOW SYSTEM:
Flow meter and micro metering valve are included. Gas tank and pressure regulators
are normally supplied by user. Timer and solenoid operated valve is available as an
option to further minimize gas usage.
PORTAL FRAME AND FOOT DECK:
Frame Option:
Description:
Number of Detectors:
Inside Dimensions:
F-25A
Lighter Model
9
14“W x 79“H
Outside Dimensions:
Flush Mount Height:
Weight:
Shipping Weight:
88“H x 30“W x 28“D
83“
155 lbs.
240 lbs.
TA
F-36
Larger with door
14
24“W doorway
21“W clearance x 79.25“H
89.25“H x 43.5“W x 57.25“D
87“
400 lbs.
500 lbs.
F-X3
Walk straight through
24
24W“ x 79“H
88“H x 30“W x 30“D
83“
350 lbs.
450 lbs.
TECHNICAL ASSOCIATES
7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103
$Revision: 1.2 $
3
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