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Updated: Dec 31, 2025

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
Published on: May 7, 2021
Non-linearity assessment of neutron detection systems using zero-power reactor transients
Tomas Bily1, Linda Keltnerova1
1Department of Nuclear Reactors, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, V Holešovičkách 2, Prague, Czech Republic.
Abstract:
A new method for neutron detection system non-linearity assessment and correction is proposed and was tested at the VR-1 reactor. It is based on the known behaviour of a zero-power nuclear reactor during the asymptotic positive period, which is used as a source of a true (non-linearity unaffected) signal for detection system non-linearity correction. The proposed method can determine the non-linearity correction continuously for a wide range of count rates and does not require additional equipment but the detection line for which the non-linearity effect is to be evaluated.
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