Device for thermal neutron photography and radiation protection

• Main Authors: FANG KAIHONG, QIAO YUJIE, LYU JINFENG, WANG QIANG, PEI XINFENG, ZHANG SHUO
• Format: Patent
• Language: Chinese; English
• Published: 19.12.2023
• Subjects: DECONTAMINATION ARRANGEMENTS THEREFOR; GAMMA RAY OR X-RAY MICROSCOPES; IRRADIATION DEVICES; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

The invention relates to the technical field of nuclear science, in particular to a thermal neutron photographing and radiation protection device which comprises a thermal neutron collimation device, a source cavity radiation protection device, a source lifting cavity and a source lifting device. The source lifting cavity penetrates through the thermal neutron photographing device and the source cavity radiation protection device, and the source lifting device is arranged in the source lifting cavity; when the source is in the storage position, the total dose rate S at a position 5cm away from the surface of the device is less than or equal to 10mu Sv/h, and the total dose rate S at a position 50cm away from the surface of the device is less than or equal to 5mu Sv/h; when the source is in the working position, the neutron fluence rate at the collimator is larger than or equal to 1.0 * 10 < 3 > cm <-2 > s <-1 >, and the thermal neutron collimation efficiency (thermal neutron fluence rate/source neutron yield)