Mirion Technologies BF3 - Manual

Featuring:
radiation monitoring
systems
A Mirion Technologies Division
BF3 COUNTER TUBES
Neutron Flux Instrumentation
BF3 COUNTER TUBES
Proportional Counter Tubes BF3 Filled
The neutron sensitivity of these proportional counters
is achieved by fi lling the tube with the gas boron-tri-
fl uorid, made of highly enriched Boron-10. Thermal
neutrons react with the isotope Boron-10 emitting
alpha particles, which produce ionization in the gas
fi lling of the detector (electrons and gas ions). In the
electrical fi eld between the electrodes these charged
particles will be accelerated and secondary ionization
happens. This so called “gas amplifi cation” multiplies
proportionally the amount of charge generated in the
tube.
APPLICATIONS
• Operational process monitoring
○ Detection and measurement of the thermal
neutrons outside the reactor core for neutron dose
rate monitoring and neutron fl ux monitoring in the
pulse range
RELATED PRODUCTS
• KNK/KNU 50: neutron ionization chambers
• Self-powered neutron detectors
• TK 250: digital signal processing channels for
start-up and power range
FEATURES
● Detection of thermal neutrons
●
High sensitivity due to fi lling with enriched BF
3
gas
● Proven construction
●
1” (25.4 mm) diameter
●
Large measuring range
●
Output signal: charge pulses
●
Very low gamma sensitivity