BM 501 Boron Meter

Category: Characterization > Inspection > Others
Reference # : Model No : BM 501

The BM 501 boron meter forms part of the NFMS product line. The BM 501 meter is designed to continuously measure the boron concentration in water circulating in process of light water nuclear power plants. The measurement principle is based on measuring the neutron absorption rate through the B-10 isotope, which depends on the boron concentration contained in the water coolant. The neutrons are generated by an internal source,which is part of the detection sub-assembly.

Benefits

•Non-intrusive on-line measurement, directly placed around process pipe.
•Can be adapted to pipe diameter.
•Category B software according to IEC 62138.
•Seismic qualification.
•Temperature compensated measurement.
•Detection sub-assembly featuring a moderator/shield (for neutron thermalisation and radiation protection).
•Standard version with two detectors, temperature sensors and signal processing units for redundancy of measurement (also available with single detector).

Limitations

•Detector: Boron-lined proportional counter.
•Measurement capability: up to 3500 ppm (Boron total).
•Neutron source: Am-Be (7.4 x 10+10 Bq, can be adapted to the application).
•Dose rate on contact with the detection sub-assembly: less than 300 µSv/h.

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BM 501 Boron Meter

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