Neutron tube reactor subcriticality measurement system and method

Belonging to the technical field of reactor subcriticality measurement, the invention in particular relates to a neutron tube reactor subcriticality measurement system and method. The system consistsof: a neutron tube for neutron generation, a neutron tube control box for neutron tube control, a second industrial control computer for transmitting set parameters controlling the neutron tube to theneutron tube control box, a first neutron detector and a second neutron detector symmetrically disposed on the reactor, a collection card for collecting a second analysis signal emitted by the firstneutron detector and a third analysis signal emitted by the second neutron detector, and a first industrial control computer for spectral analysis of the analysis signals. The collection card is alsoin connection with the neutron tube control box to output a modulation signal to the neutron tube, and at the same time the modulation signal is fed back as a first analysis signal to the first industrial control computer to par