ABPM 203M Alpha Beta Particulate Monitor
by BIL Solutions

Particulate Monitor, designed for continuous monitoring of airborne radioactive particulate contamination

  • new generation of monitor simultaneously performing:
  • the artificial a and ß activity concentration and cumulative activity measurements
  • the absorbed g dose rate indication

New features:

  • On-line a spectrometry and digital windows which can be modified according to the isotope to be measured
  • mass flowmeter integrated
  • radiomodem integrated optionally
  • compact, portable and mobile equipment
  • alphanumeric display of a, ß, g equipment
  • display natural and artificial activity of a particulates
  • dynamic compensation of a and ß

Radon daughter products

  • g dynamic compensation
  • static compensation by mechanical focusing
  • sensor available in close vicinity of personnel respiratory tracts
  • audible and visual signalling
  • integrated suction pump
  • automatic-advance filter roll transport mechanism
  • RAMSYS network compatible

Applications

  • intervention on mobile site or fixed installation
  • continuous radiological monitoring of the atmosphere in nuclear plants

Main subassemblies

  • particulate sensor, including:
  • 2 silicon detectors (basic version)
  • a sequential-advance filter paper roll transport mechanism
  • processing and indicating unit including3 lights and a buzzer for the audible and visual indicating
  • air sampling pump
  • electrical unit including the external connections and mass flowmeter

Standard version

  • detection : a, ß, g

Accessories

  • Software : MASS, SAMS, RAMVISION
  • Cable/suction tube : 3m or 10m
  • Junction box : BJ11
  • ABPM 203 / BJ cable
  • Source holders : SC31, SC32, SC33
  • 433 MHz radiomodem (frequency & power on request)
  • Wall-mounted support

Physical Characteristics

Energy range :

  • natural a : 5.5Mev to 9Mev (Radon,Thoron...)
  • artificial a : 3 to 5.5 MeV (Uranium,Plutonium,Americium,Thorium.....)
  • ß :80 keV to 2 MeV (Tl204,Sr90,Co60...)
  • g (réf. 137Cs, E?= 660 keV)

Measurement range :

  • a : 10-2 to 104 Bq/m3
  • ß : 1 to 107Bq/m3
  • g : 0.1 to 2.5.103 µGy/h
  • detectors : silicon diodes
  • response time for 10 Bq/m3 of radon and 0.1 µGy/h of dose rate:
  • ß : 1.33 Bq/m3 in 60mn
  • a : 0.057 Bq/m3 in 60mn

Functional characteristics

  • continuous measurement and display of :
  • contamination of airborne a and ß emitter particulates
  • natural radon activity
  • ambient g absorbed dose rate (for information only)
  • compensations :
  • a of the radon daughter products by grid and spectral differentiation
  • ß of radon daughter products
  • dynamic and permanent of ambient g by the second silicon detector
  • Signalling which can be set up :
  • Normal operation : green light
  • alarm 1 : yellow light + buzzer
  • alarm 2 : red light + buzzer
  • alphanumeric display :
  • continuous display of a, ß, g measurements and radon estimation
  • measurements units : Bq/m3,Bq/m3.h, µGy/h,DAC DAC.h.....
  • display of maintenance information (pump operation duration, Status of possible faults...)
  • programming and analysis by portable computer (display of historical trend, Event summary, Alpha spectrum...)

Other characteristics

  • flowrate : 35 l/min adjustable
  • filter roll transport mechanism endurance: > 3 months
  • inputs/outputs :
  • RS 485 network links
  • digital information remote indication
  • analog information remote indication
  • RS 232 for portable computer
  • immunity to electric and electromagnetic field:
  • compliance with EN-50082-2 recommendations
  • operating conditions :
  • operating temperature: 0 to 40 °C
  • storage temperature: - 25 to 85 °C
  • relative humidity : 80 % (without condensation)
  • power supply : 230V/50Hz ± 10 %
  • protection index : 325
  • dimensions : (h x w x d)
  • arm deployed : 1200 X 340 X 240 mm
  • arm folded : 610 X 340 X 240 mm
  • weight : 26 kg
  • equipment certified CE

Options

  • a measurement only
  • power supply : 120V/60Hz

Radiomodem and Centralization:
The integration of the radiomodem on the monitor enables its installation at all site points with data centralization without being concerned about cable problems.

The real-time display of the alpha spectrum (or spectra stored in the monitor), is then easy during the investigations conducted subsequent to an event (exceedance of an alarm threshold for instance).


Alpha spectrum achieved with SAMS software

As standards, specifications and design change from time to time, please ask for confirmation of the information given in this publication.