WBM-IIS Portal Type Radioactive Pollution Monitor for Personnel
WBM-IIS Portal Personnel Pollution Monitor is mainly used at the radiation health outlet of nuclear power plant or related nuclear facility plant. It is used to monitor the alpha and beta radioactive contamination (including alpha radioactive contamination on the surface of hands and feet) of all parts of the body when workers leave the radiation control area. Its main function is to inspect the whole body surface pollution of personnel, control its pollution level, establish isolation control zone, so as to avoid pollution diffusion in control zone.
The monitor consists of 32 large area scintillator detectors. The total detection sensitivity area of the detector is over 13550 square centimeters. When the alpha and beta particles are detected, the pulse signal is generated. After amplification and shaping, the data are processed by industrial computer, and then the contaminated persons are judged according to the preset alarm threshold. The monitor can monitor human hands, feet, whole body and head by two-step measurement. If the contamination is detected, the alarm is automatically given and the contaminated area is displayed by the monitor. The whole monitoring process is fully automated.
Technical Indicators:
1 Counting efficiency:
Using 90Sr~90Y Surface Source (2pi)
The beta efficiency of the whole body monitoring tract is more than 30% and that of the hand monitoring tract is more than 30%.
The beta efficiency of the head monitoring tract (> 30%) and the foot monitoring tract (> 30%)
Using 239Pu Surface Source (2pi)
The beta efficiency of the whole body monitoring tract is more than 30% and that of the hand monitoring tract is more than 30%.
The beta efficiency of the head monitoring tract (> 30%) and the foot monitoring tract (> 30%)
2. Energy response:
The instrument can detect beta nuclides with energy of 150 keV~3 MeV, and the maximum error is less than 50%.
Minimum detectable limit:
Confidence 95%, environmental background 0.1 uSv/h, measurement time 10 s:
Minimum detectable limit:
α ＜0.037 Bq/cm2
β ＜0.37 Bq/cm2
Coefficient of variation:
The coefficient of variation of instrument is less than 10%.
5 Series Ratio:
The alpha-to-beta ratio is less than 30%.
Beta-to-alpha tandem ratio < 1%
6 Environmental characteristics:
Temperature ranges from 0 to 40 degrees Celsius
Maximum humidity 90% (40 C)
Atmospheric pressure 0.086 MPa to 0.106 MPa
7 supply voltage:
220V AC (-12% - +10%) frequencies range from 47Hz to 51Hz
UPS standby for 1 hour
8 Whole power consumption:
220V AC 120W
9 Mechanical dimensions:
Instrument Size: 1000mm long * wide * 1000mm high * 1575mm * 2820mm
Entrance width: 500 mm, exit width: 440 mm
Measuring room length * width: 2050mm * 850mm
Hand cavity entrance width: 150 mm, height 530 mm
The height between the center of the hand cavity and the bottom of the foot groove is 850 mm.
Measurement height: adjustable in the range of 1700mm-1950mm
10 Weights:
Net weight of instrument 600 kg
