Tungsten Alloy Shielding Extrusion Process

Extrusion, which is a process used to create objects of a fixed cross-sectional profile. Tungsten alloy shielding material can be pushed or pulled through a die of the desired cross-section in extrusion process. The extrusion process may also increase the strength of tungsten alloy shielding.
The process begins by heating the stock material (for hot or warm extrusion). It is then loaded into the container under the press. A dummy block is placed behind it where the ram then presses on the material to push it out of the die. Afterward the extrusion is stretched in order to straighten it. If better properties are required then it may be heat treated or cold worked. The extrusion ratio is defined as the starting cross-sectional area divided by the cross-sectional area of the final extrusion. Compare with forging, one of the main advantages of the extrusion process is that this ratio can be very large while still producing quality parts. For the extrusion process, only one compression can cause extrusion ratio is about 60%~80%. In forging process, one compression cause extrusion ratio is no more than 20% ,otherwise the scrap rate will be greatly enhanced.

Tungsten Alloy Shielding for Gamma Sources of Cesium 137

A new technology for gamma shielding is already used as tungsten alloy material radiation protection. There is a research for special tungsten alloy material for gamma sources of Cesium 137, which is a lead-free radiation protective fabric in a form of a blanket created with nanotechnology. It could reduce emission from high energy gamma sources such as Cesium 137. Such material might be hidden beneath the silicon ceramic or inside of the cylindrical body of E-cat HT where the heaters are placed.
As its high density, good machinability, high hardness, excellent elongation, wear resistance, tungsten alloy material is more and more popular for gamma sources shielding and protection. For more details, you could visit http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html.

Tungsten Alloy Shielding for Gamma Radiation

Gamma rays emitted from the nickel nanopowder that is closer to the cylindrical enclosure will be stronger. From the publicly released information by Focardi and Rossi it is known that a small gamma radiation exists. For this purpose the E-cat described in the Rossi patent contains a lead jacket. For the E-cat HT reactors that were tested by G. Levi et al., however, a lead jacket was not noticed. This does not mean that there is not any radiation shield. With the advancement of nanotechnology a new way of effective gamma radiation shield is developed. This has been in focus of NASA research for years.
Tungsten alloy material is suitable for gamma radiation protection, for more details, you could visit http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html.

Tungsten Alloy Shielding for Reducing Harmful Radiation

Tungsten Alloy radiation shielding is becoming more and more popular, as it could protect people from harmful effects of ionizing radiation, a type of excellent radiation-absorbing material is badly needed.

Experts find that radiation exposure could be reduced by maxing shielding. The density of a material is related to its radiation stopping ability. Higher density means better stopping power and shielding. Due to a higher density, tungsten alloy radiation shielding has a much higher stopping power than lead. Its greater linear attenuation of gamma radiations means that less is required for equal shielding.

Tungsten heavy alloy is a suitable raw material for radiation protection, as its combination of radiographic density (more than 60% denser than lead), machinability, good corrosion resistance, high radiation absorption (superior to lead), simplified life cycle and high strength. It can provide the same degree of protection as lead whilst significantly reducing the overall volume and thickness of shields and containers. Besides, compared with lead or depleted uranium in the past, tungsten heavy alloy radiation shielding is more acceptable because they are non-toxic.

Tungsten Alloy Shielding for Radiation Stopping

The extended health data and dosimetry including external irradiation and transuranium elements are available for staff of the “Shelter” object at the RCRM. The existing experience of French and other international registries as well as of the State registry of exposed after Chernobyl, the Clinical-epidemiological registry, and dosimetry databases gained in the Research Center for Radiation Medicine from the prospective follow-up studies could help for practical implementation of the nuclear workers registry. Several tasks are foreseen that could be successfully implemented with international cooperation: a survey of professions, types of jobs and radiation qualities; development of qualification criteria and accreditation procedures for personal dosimetry services; pilot study of medical registry of occupationally exposed workers. Establishment of a new multi-thousand cohort for both prospective and retrospective biomedical and epidemiological studies will allow more precise estimated of the low dose effects of ionizing radiation. 

The density of a material is related to its radiation stopping ability. Higher density means better stopping power and shielding. Due to a higher density, tungsten heavy alloy has a much higher stopping power than lead. Its greater linear attenuation of gamma radiations means that less is required for equal shielding. Alternatively equal amounts of tungsten shielding provide diminished exposure risks than equivalent lead shielding. For more details, please visit tungsten alloy shielding.

Tungsten Alloy Shielding for Radiation from Moon and Mars

Radiation protection assessments are performed for advanced lunar and Mars manned missions. The Langley cosmic ray transport code and the Langley nucleon transport code are used to quantify the transport and attenuation of galactic cosmic rays and solar proton flares through various shielding media. Galactic cosmic radiation at solar maximum and minimum conditions, as well as various flare scenarios, is considered. Then shielding thickness and shield mass estimates required to maintain incurred doses below 30-day and annual limits are determiner for simple-geometry transfer vehicles.

Tungsten alloy has very high density where it is used to radiation protection. The density for tungsten alloy is up to 65% denser than lead and 130% denser than steel. In this way, radiation could be adsorbed well compared to other material.

For more details, please visit tungsten alloy radiation shielding.

Tungsten Alloy Shielding is Better Than Lead

Tungsten alloy shielding is more an more popular for radiation protection. Generally speaking, the absorption rate of X-rays and gamma radiation is directly proportional to the density of the shielding material, as tungsten alloy has a high density but small capacity, tungsten is a suitable for radiation shielding. Since tungsten alloy is denser than lead, these alloy can be up to one and a half times more effective than lead, and provide extremely efficient protection from radiation sources, especially in applications where space is limited.

Tungsten alloy shielding for radiation protection.