Detection device UDPN-07 is intended for monitoring of density of thermal neutrons during refueling at reactor plant in composition of neutron flux monitoring equipment (NFME).
UDPN-07 sensitivity for thermal neutrons is (0.5 ± 0.1) cm2 (pulses during 1 s at the flux density of 1 neutron via 1 cm2 during 1 s).
Detection device UDPN-07 consists of:
Detection unit BDPN-06, implemented in the form of casing (thin-wall cylinder made of stainless steel). BDPN-06 converts neutron radiation into pulses.
The appearance of detection unit BDPN-06 is presented on the picture:
- Conversion unit BPH-07, implemented in the form of flat housing, inside of which electromagnetic shield with electronic modules is located. BPH-07 performs the following:
- amplification of current pulses from BDPN-06;
- discrimination of noise pulses;
- generation of output pulses which frequency is proportional to neutron flux density.
The appearance of conversion unit BPH-07 is presented on the picture: