The BIG Usage of SMALL Neutron III

In neutron imaging, the neutron must be slowed down to the speed required for the imaging after it is produced.The speed of the neutrons affects the depth of penetration and the final image, allowing fine-tuning of the process.Neutron imaging applications range from inspection of welding, casting parts, turbine blades, nuclear fuel rods and high-precision components in industrial and other fields, to detection of explosives.

Neutron activation analysis (NAA) is different from neutron imaging and basically works in the same way as Curiosity’s DAN module.The increasing use of fusion-based neutron generators for neutron imaging and related purposes makes it possible for smaller, more efficient devices to emerge.The U.S. military’s NEMESIS (neutron emission mobile explosives sensing and recognition system) program is one of them, to make the use of small devices easier, can detect the like improvised explosive device (IED) and mines of explosives, and even metal detector and ground penetrating radar (GPR) to detect free of metal mines.

Phoenix LLC, which is involved in the NEMESIS project, believes that the NAA and neutron imaging equipment could be used in the future not only for hazardous tasks, but also for routine tasks such as bridge inspection and avionics inspection.According to the company, most of the effort is now focused on improving detection algorithms and making devices more robust and affordable.

Science fiction
While much of this may sound quite fantastic, like being able to ‘see’ into the ground, find buried explosives, or see cracks in turbine blades or weld seams, one can see it as an advance on commonly used techniques such as X-rays.Since the 20th century, X-rays and other radiation have been found to be easy to produce, but the process of producing large numbers of neutrons in an efficient way without the need for a nuclear fission reactor has improved little for decades.

Fusion devices have many advantages and are not complicated to maintain.For an unsealed fusion plant, a continuous supply of deuterium-tritium (or deuterium-deuterium) fuel requires no maintenance, except for the replacement of the radiation-producing components of the generator.These parts belong to low – and medium-level radioactive waste, which is similar to waste produced in laboratories and hospitals and is easy to dispose of.

Although handheld scanning devices that use neutron sources for environmental analysis are still some way off, neutron imaging has the potential to improve lives in many ways, just as X-rays do.

The technical problems to be solved in the application of ionizing radiation protection in nuclear technology :( 1) How to design 8% boron-containing polyethylene board; (2) How to make boric acid and polyethylene melt at the same temperature in the process, and not form metaboric acid and pyroboric acid, so that it is easy to mix, heat, extrusion and roll forming. 1. According to the chemical formula H3BO3 and atomic weight of boric acid, the percentage of boron is calculated to be 17.48%, and then the weight percentage of boric acid should be added in 100 kg boron-containing polyethylene is calculated to be 46%, and 8% boron-containing polyethylene board is designed. 2, the development of boric acid processing temperature can be temporarily raised to 120℃ without decomposition of A solvable agent, but also can reduce the melting point of high density polyethylene to 120℃ B solvable agent, to solve the problem of boric acid coking. Applications: neutron radiation protection in nuclear power stations, medium (high) energy accelerators, atomic reactors, nuclear submarines, medical accelerators, neutron therapy equipment and other places.

Our company specializes in producing borated polyethylene sheet, lead boron polyethylene sheet and other products. We can do CNC processing according to the drawings. The boron content varies form 2% to 50%. Welcome to contact us !


Post time: Jul-23-2021