Device for real-time measurement of energy spectrum of neutrons in reactor

Abstract

The invention belongs to the nuclear radiation detection technical field and relates to a device for the real-time measurement of the energy spectrum of neutrons in a reactor. The device comprises a plurality of optical fiber probes, a plurality of optical fibers, a circuit module and a computer data processing system; each optical fiber probe comprises an optical fiber tail end and a detection material which coats the optical fiber tail end and is used for generating scintillation light; one end of each optical fiber is connected with each optical fiber probe, and the other end of the each optical fiber is connected with the circuit module, so that the optical fiber can be used for transmitting the scintillation light; the circuit module is used for converting and amplifying the signals of the scintillation light generated by the optical fiber probes into digital signals; and the computer data processing system is used for receiving the digital signal data from the circuit module, processing the digital signal data and rendering neutron spectra at positions where each optical fiber probe is located. With the device of the invention adopted, the signals can be acquired in real time, and neutron energy spectrum distribution at the positions where the optical fiber probes are arranged can be obtained, and therefore, and a defect that an existing activation sheet measurement technology requires a plurality of times of irradiation and spectrum unfolding and takes a long time to obtain energy spectra can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation detection and relates to a device for real-time measurement of neutron energy spectrum in a reactor. Background technique [0002] The measurement of neutron distribution is very important for the study of reactors and neutron generators. Various methods are currently available for such measurements. BF 3 or 3 He proportional counter tubes can be used for real-time measurement of neutrons, but such detectors are usually difficult to penetrate into narrow spaces such as the gaps of fuel elements. In recent years, a small optical fiber neutron detector has been developed internationally, and the volume of this type of detector can be 1mm 3 Even smaller, for easy access into the reactor and real-time measurement of neutrons. [0003] The composition of the detection system of this type of small fiber optic neutron detector is as follows: figure 1 shown. The scintillation light enters...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a device for real-time measurement of the neutron energy spectrum in the reactor to solve the technical problem that the existing active sheet measurement technology needs to perform multiple irradiations and spectrum analysis, and it takes a long time to obtain the energy spectrum

Images