STM-GR2 Online Gamma Radiation Monitor
This device is used for real-time online monitoring of the gamma activity concentration of radionuclides in pipelines at nuclear power plants, able to provide the total gamma activity concentration and feed back the monitoring information. It is provided with a low detection limit and functions such as local display, local storage, self inspection, as well as audible and visual alarm. In addition, activity information can be viewed online and energy spectrum information can be viewed offline.
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- Components: Large-volume NaI detector, digital multi-channel analyzer, local processing display unit, and shielding support
- Measurement range: 1.85×103 Bq/m3 ~ 3.7×108 Bq/m3
- Lower detection limit: ＜30 Bq/L (pipeline diameter 100mm, pipeline thickness 6mm, reference nuclide 137Cs, measurement time 15s, confidence 95%)
- Precision: Better than 10%
- Accuracy: Better than 20% for the full measurement range
- Stability of the indicated value : No more than 2% within 100 hours
- Deviation before and after overload: No more than 2%
- The alarm threshold is adjustable within the full measurement range, and the stability of alarm threshold ＜5% within 100 hours
- Meet Category I seismic requirements
- Protection grade: IP65 / IK07
- MTBF (mean time between failures): ＞20,000 hours
- The electrical safety characteristics, electromagnetic emission performance, electromagnetic compatibility performance, and corrosion resistance meet corresponding national standards.
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