Neutron detection device and personal dosage alarm apparatus using same

Abstract

The invention relates to a personal neutron dosage alarm apparatus, and the neutron dosage is calculated by detecting a ratio of scattering neutrons to incident neutrons. The alarm apparatus comprisesa neutron detection device, a processor connected with the detection device, and a power supply, a display screen, an LED indicating lamp, a buzzer, a memory, an infrared transmission unit and a functional keyboard. The neutron detection device comprises a detection system A, a detection system B and a thermal neutron shield, the detection system A and the detection system B are completely identical, the thermal neutron shield is used to absorb incident thermal neutrons and is designed in a cap shape; and the detection system A is arranged outside the thermal neutron shield and used to detectincident slow neutrons; and the detection system B is arranged inside the thermal neutron shield and used to detect neutrons reflected by the human body. The personal neutron dosage alarm apparatus is small in size, low in working voltage, and high in electromagnetic interference resistance, and can work in a high-humidity environment for a long time.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation measurement, in particular to a neutron detection device and a personal dose alarm instrument using the device. Background technique [0002] The neutron personal dose alarm device is mainly used for personal dose monitoring of neutron rays by radioactive workers, reminding personnel whether the neutron dose in the working environment exceeds the standard, and whether protective measures should be taken. The neutron personal dose alarm device has the characteristics of ultra-threshold alarm, intuitive reading, miniaturization and portability. [0003] Neutron dose measurement is a relatively difficult subject. The conversion of neutron fluence to dose from thermal neutrons to 15MeV energy range is more complicated, and different energy response adjustment devices are used in portable instruments. By adjusting the device, the measured value is directly proportional to the dose in the ful...

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Problems solved by technology

[0005] The purpose of the present invention is to: aim at the problem of poor energy response of the neutron personal dose alarm instrument at the present stage, to propose a neutron personal dose alarm instrument with good energy response, small error, high gamma suppression performance, and real-time alarm

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