ITEL TELECOMUNICAZIONI S.r.l. Società Unipersonale Email: [email protected] - 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: [email protected] - 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: [email protected] - 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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