Download MoniRAD Air Sampling

ITEL TELECOMUNICAZIONI S.r.l.
Società Unipersonale
Email: itel@itelte.it - www.itelte.it
MonirRAD® Air Sampling
1. Features
Continuous air monitoring for gamma particulate
Real-time data acquisition and control
Scintillation detector with gain stabilization
Built-in Pb shielding
On board datalog
Mass flow control
Vacuum pump for air sampling
Single or Multiplexed air input (up to 8 air input)
Optional MoniRAD® Area Measure integration
2. Description
MoniRAD® Air Sampling is an air gamma radiation level measuring system able to
work independently or in cooperation with MoniRAD® Area Measure.
The system monitors radioactive airborne levels in either working spaces, or via a
process tubing connection to a remote stack, duct or other air space.
The system measures the air gamma level by means of a NaI scintillator placed in a
Marinelli geometry container and a dedicated fast TTL counter.
The vacuum pump pumps the air in the Marinelli container (3 liters) by means of a
multiplexer system that connects up to 8 environments (minimum 4 minute to
complete a single step of the cycle).
ITEL TELECOMUNICAZIONI S.r.l.
Società Unipersonale
Email: itel@itelte.it - www.itelte.it
3. Block diagram
CHIMNEY
LOCAL MONITORIZED
MULTIPLEXER
VACUUM PUMP
FLUXMETER
MARINELLI Pb SHIELDED
NaI PROBE
ITEL TELECOMUNICAZIONI S.r.l.
Società Unipersonale
Email: itel@itelte.it - www.itelte.it
4. Technical data
Fiddler Probe
Scionix 2” NaI Scintillator
Description
127 mm diameter, 2mm high NaI(Tl) crystal coupled via 51
mm tick quartz light guide 130 mm diameter
Photomultiplier Tube in Aluminum housing
NaI(Tl) Crystal
127 mm diameter
Entrance windows
0.25 mm tick beryllium (BD version) > 2 keV
0.0025 mm Aluminum (BA version) > 10 keV
Optical windows
Low background quartz 51 mm thick
Photomultiplier Tube
130 mm diameter EMI 9390
Energy Resolution
<30 keV for I-129
<25% for 241-Am
Temperature Range
-10 degrees C to +60 degrees C
Temperature Gradient
20 degrees/hour
Oil-less Vacuum Pumps
Becker VT4.16 series
Flow (SCFM@ 0 in Hg)
11
Horsepower
0.94
Speed (RPM)
1740
Max. Cont. Vacuum (in HgV)
25
Weight (lbs)-w/motor
50
Noise Level (Max. dbA)
64
Inlet size (BSP, inches)
1/2
Flowmeters Glass Tube
Brooks Instrument
Medium
Air
Density
1.293 Kg/m3n
Viscosity
0.018 cP
Accuracy
2.5 VDE/VDI 3513
Flowmeters Glass Tube
Brooks Instrument
Noise Level (Max. dbA)
64
Inlet size (BSP, inches)
1/2

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