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产品类别- 核反应堆检测系统 >>中子通量监控系统 >>
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Shutdown Margin Monitor

The Thermo Scientific Shut down Margin Monitor can be used to detect unplanned boron dilution events, report significant increases in neutron flux and provide a 1/M or 1/N Meter. The monitor accurately measures Source Range neutron count rate and computes an alarm set point as a user-selected multiple of the lowest measured count rate.

The Thermo Scientific Shut down Margin Monitor measures the count rate from a neutron counting instrument and identifies any statistically significant increase that would indicate a loss of reactor shut down margin. The special design minimizes unwanted background counts from electromagnetic pick-up or from alpha, beta or gamma flux at the detector.  The unit also provides normalized inverse count rate (1/M) as an aid in fuel loading and approach to criticality. This monitor can supply containment evacuation and high flux at shut down alarms and trips eliminating false signals from the older equipment and frequent operator adjustment.
  • Provides warning of unintentional loss of shutdown margin
  • Allows operator sufficient time to stop an unplanned loss of shutdown margin
  • Monitors neutron flux count rate at the reactor core for a statistically significant increase