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North Penn Business Park,
4500 North Cannon Ave. Lansdale, PA
19446, USA
Tel No.: (267) 436-3991
Fax: (215) 362-5343

Email id: cmills@apantec.com
Tel No.:267-436-4034
Thursday, September 18, 2014
Friday, July 18, 2014
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Providing Innovative Engineering Solutions for Radiation MonitoringProviding Innovative Engineering Solutions for Radiation Monitoring Providing Innovative Engineering Solutions for Radiation Monitoring
Accident Range Noble Gas Monitor
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Accident Range Noble Gas Monitor
Gain Stabilized / Drift Free
Net Ready
Accident Range Noble Gas Monitor

The AM3A Accident Range Noble Gas Monitor is designed to measure high range noble gas activity on a continuous basis. Included with the AM3A are parallel particulate/iodine collectors for retention of high activity levels of particulates and iodine. The P/I filters are lead shielded to reduce ALARA concerns and include active gamma monitoring of the accumulated does rate. A gamma GM detector (model GG1W) is associated with each P/I filter to measure the accumulated dose rate on the filter media. Once the sample gases have passed through the parallel collectors, the noble gas activity level is measured in a lead shielded sample volume. The GG1W detector is located within the lead shield and inserted into the sensitive volume for measurement. The output from the detector communicates with the skid mounted display and control unit (model RM1R) using Ethernet (TCP/IP), RS232, or RS485 communications for display of the measured activity and for alarm determination. The noble gas sampler includes a vacuum transducer to automatically correct the measured activity to standard pressure. Local RM1R display and control units are included for system operation, data concentration and communication. The vacuum pumping system uses a positive displacement metal bellows pump for transport of sample gases through the monitoring system. A mass flow meter and proportional control valve allows the sample flow rate to be either manually set to the desired flow or to match the sample flow rate to a stack or vent velocity for representative sampling

A flow rate signal is provided to the local RM1R electronics for determination of total release and for calculation of concentrations. Alarms are included for annunciation of a low flow condition. The AM3A operates in conjunction with the Apantec model(s) AM3F or AM3M normal range skid to provide seamless monitoring over the entire range. Upon increasing activity measured by the AM3M/F normal range monitor, the accident range AM3A monitor will automatically start the sample pump and begin monitoring. Once the activity level drops, the AM3M/F will automatically begin normal range monitoring and the AM3A accident level monitor will stop monitoring activities. The AM3A samples at a significantly lower sample flow rate to reduce the build up of high radioactivity on the particulate and iodine filters.

GG1W Gamma GM Detector

GG1W Gamma GM Detector The GG1W Intelligent Gamma Probe is an integrated real-time Gamma radiation-monitoring device that provides highly accurate indication of ambient Gamma radiation over a wide range. The GG1W uses a pair of halogen quenched Geiger Mueller tubes for sensitivity to ambient gamma radiation levels. The GM tubes are operated using a “Time-To-Count” method which removes the limitations associated with traditional ‘constant bias’ GM tube circuits.

  • Detects gamma radiation from 80 keV to 2 MeV with a linearity of ±20%.
  • Dynamic range of 10-4 mSv/h to 105 mSv/hr.
  • Electrically connects via a multiconductor shielded cable to an associated Apantec’s RM1-series Display and Control unit.
  • The GG1W is housed in a rugged cylindrical aluminum housing with a NEMA4 rating. When provided with an internal check source, the detector is designated as Model GG1WC.

    GG1W Specifications
    Detector: Halogen quenched energy comp. GM tube
    Sensitivity: 1800 cpm/mR/h.

    10 uR/h to 1,000 R/h.

    Alarm/Status Indicators:
    Alarm indicator: Red
    Normal indicator: Green
    Audible indicator: 80 dB @ 3 ft. with Mute
    Digital: (1) TCP/IP Ethernet
      (1) RS-485 serial;
      (1) USB port

    Analog: (1) 0-10VDC

    Alarm Relays: (150 mA @120 VAC, 150 mA @
    Inputs: Two 0-5 VDC analog inputs
    Power: 12 VDC, 1A nominal, (9 VDC to 15 VDC)
    (optional 110/220 VAC 50/60
    Hz converter)
    Temp: 10 to +50 °C
    Humidity 0-95% RH, non-condensing
    Dimensions: 5” high x 4” wide x 3” deep
    Weight: 2 lbs
    The AM3A is provided fully wired and plumbed on an open frame skid for ease of maintenance. A power distribution enclosure is provided which distributes the required operating voltages to the system electrical components. In addition, the power distribution box provides an instrument ground function as well as providing circuit breaker protection for the system.
    RM1R Specifications
    PROCESSOR: 32-Bit High Performance 133Mhz Integrated Microcontroller Designed for Real-time & PC/AT-compatible embedded applications Robust Automotive / Telcom Grade Technology with Watchdog Timer
    I/O PROCESSOR: Dedicated / High Performance I/O Co-Processing via FPGA / 100 Mhz

    Fluorescent Analog/Digital Auto ranging and Auto-zeroing

    Alarm/Status Indicators:
    Red indicator: HIGH
    Amber indicator: ALERT
    White indicator: FAIL
    Green indicator: NORMAL
    Digital: (3) RS485
      (1) TCP/IP Ethernet
      (1) USB

    Analog: (4) 0-10VDC, or
      (4) 4-20 mADC isolated Six DPDT relays for FAIL, ALERT,HIGH other alarms Relay contact rating 5A @ 115VAC resistive

    POWER: 90-260VAC, single phase, 47 to 63 Hz, 15 watts
    TEMPERATURE: -10°C to + 50°C
    HUMIDITY: 0-95% RH, non-condensing
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