DGK 260™ Digital Power Range Channel
Neutron flux monitoring during power operation.
Neutron flux monitoring during power operation.
KNK/KNU 50 ACH™
γ-Compensated/Uncompensated
Neutron flux detectors for the intermediate and power range
Features
- Wide thermal neutron flux range from 102 to 1010 nv
- Robust design, uniform sensitivity
- Detector available with sensitivity from (0.7 to 4.4) × 10-14 A/nv
- No organic materials and therefore suitable for longterm operation in high radiation environment
- Saturation proof over entire neutron flux range
- Intrinsic gamma compensation (KNK 50 ACH)
- Integral MI cable with or w/o PEEK layer for mechanical protection and electrical insulation
- Variant with transition/splice to organic cable available (KNU/KNK 50 ASH)
- Accident/LOCA proof (KNK 50 ACH/ASH)
Description
The neutron ionization chambers of type KNK 50 ACH and KNU 50 ACH are designed for measuring the neutron flux outside the reactor core during reactor start-up and power operation, respectively.
The detector signal consists of a current that is proportional to the thermal neutron flux at the detector position. The electrical current is generated by the lithium nuclei and the α particles resulting from the B 10 (n, α) Li 7 reactions inside the homogeneously distributed B 10 layer. Either of the two positively charged nuclei is entering the gas-filling of the chamber causing secondary ionizations that are collected at the electrodes with the help of the applied bias voltage. The resulting DC signal can be measured through an external electronic circuit.
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