Model LEM series - Liquid Effluent Monitor
From Nuclear - Liquid Monitors
The LEM series monitors allow off-line measurement of volume gamma activity of liquids with very low minimum detectable activities. It is suitable for spectrometric measurement and reporting of liquid effluents from nuclear power facilities. The LEM series monitors allow off-line measurements of the volume gamma activity of liquids with very low minimum detectable activities. It is suitable for the spectrometric measurement and reporting of liquid effluents from nuclear power facilities. The LEM monitors can be used as part of extensive monitoring systems or as an autonomous monitor, displaying results at the place of measurement or with a remote display of measurement results as well.
Product Details
- The LEM liquid effluent monitor consists of the following primary parts:
- Measurement chamber with variable shielding
- Spectrometric detector (NaI(Tl), LaBr3 or HPGe)
- System for evaluating measured data with a multi-channel analyser (as many as 64 thousand channels) and supporting electronics
- Control unit with display
- System for automatic control with valves, standard value measurement elements, and other accessories
The detector is located in a shielded measurement chamber, where the medium is released into the valve system in such way that secures uniform mixing and the prevention of sediment and debris deposition. Information from the detector is analysed using the multi-channel analyser and processed using the evaluation unit.
The LEM monitor control unit allows:
- Comparison of the value measured with alarm levels
- Automatic background measurements at preset intervals
- Monitor calibration using a sealed source of ionizing radiation
- Filling the measurement chamber with the calibration solution
- Clear water rinsing and measurement chamber discharge
- Monitoring effluents and control of up to two inlet pumps
- Monitoring the flow rate, pressure, and temperature
- Data transfer into the host system
Advantages
- System is optimal for monitoring and reporting effluents because of its low MDA
- The measurement chamber is provided with non-stick layer and drainage to prevent accumulation of mud and dirt on the chamber's inner surface.
- The system combines both the measurement chain and the automatic control system (it can replace the flowing liquid volume measuring system).
- The system's simplicity and modularity allow the user to set up the monitor from a previously used type of detector within system modernisation.
- The system is ready for integration with the system LES for collection of standard samples and post-accident samples.
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