Tungsten Radiation Shielding for Medical Industry

X-Ray existed in medial industry has very high intensity radiation primarily for component inspection of critical manufactured parts. The inspection of welds for example is of prime importance in any aircraft component or in the inspection of nuclear power plant piping. That type of X-Ray for the inspection is the expensive micro processing circuitry. Radiation shielding for medial industry applications require thicker lead or thicker lead-equivalent glass in lead lined wall material or shielded doors. Doors may also require borated polyethylene to shield from neutron scattering. The highest level of shielding is required badly for X-ray in medical industry. As far as I know, tungsten alloy with density from 17.0g/cm3 to 18.5g/cm3 has excellent radiation absorption for X-ray. Besides, due to its good machinability, it could be machined into different shapes, such as brick, working as the tungsten radiation shielding wall, each brick is manufactured with four tongue and groove edges for interlocking. In this way, X-ray in medical industry could be absorbed well by tungsten radiation shielding.

Tungsten Radiation Shielding Forging Process

Forging is a main machining process to produce tungsten radiation shielding.Tungsten and several tungsten alloys have been successfully forged over a wide range of temperatures from as low as 1800 to 3500F. In rocket nozzle forging, a billet height reduction of approximately 80% at forging temperatures below the critical recrystallization temperature is considered essential. This imparts the fine-grained, fully wrought, fibrous structure that is characteristic of high strength and good ductility at low transition temperatures.
Tungsten is generally forged in the hot-cold work temperature range where hardness and strength increase with increasing reductions. Both systems exhibit increasing forgeability with decreasing grain size.The greatest use for tungsten forgings has been in rocket nozzle applications. Production forging of tungsten nozzle inserts has been largely limited to billets prepared by powder metallurgy techniques because of their earlier availability than cast tungsten.

Radiation Exposure on Mars

The 210-day trip on Mars results in radiation exposure of the crew of 386 +/- 61 mSv. On the surface, they will be exposed to about 11 mSv per year during their excursions on the surface of Mars. This means that the settlers will be able to spend about sixty years on Mars before reaching their career limit, with respect to ESA standards. In this way, radiation protection for scientific research is very important for scientist. 

According to studying, which shows that tungsten material has a high density 65% denser than lead and 130% denser than steel, if the material goes denser, then the radiation absorption ability will be better. 

We could get the calculation from the following formula:

Formula: K = e0.693 d / △1/2

K: Shield weakened multiple

△ 1/2: The shielding material of the half-value layer values

d: Shielding thickness, with the half-value layer thickness of their units, people need to half-value layer thickness of the quality of translation into the thickness of the material, divided by the density of the material can be obtained.

For more details, you could visit: http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html.

Choice of Radiation Shielding Instruments

While the community is responsible for establishing uniform rules in the radiation protection field in order to achieve a high level of health protection of workers and the general public, it falls on to transpose into their national legislation such rules and to implement them.

A directive is therefore best suited to create a common approach on defining requirements for radioactivity parameters for monitoring the quality of water intended for human consumption in the light of scientific and technical progress.

As a consequence, harm onised requirements for the protection of the health of the general public with regard to radioactive substance in water intended for human consumption are defined.

Tungsten material could be used for radiation shielding to provide radiation protection.

Radiation Shielding in Medical

With the increasing use of endourologic procedures to diagnose and treat urologic problems, the urologist's exposure to radiation from fluoroscopy becomes an important safety consideration. Although collimation of the x-ray beam generally prevents direct radiation exposure by the urologist, the patient absorbs radiation during the procedure and becomes a secondary source of exposure through radiation scatter.
Then human try to search some material, such as tungsten, which has high density and excellent radiation resistance, to make radiation shielding for preventing the radiation hazard from x-ray, β-ray and γ-ray etc. during endurologic procedures. Urologists should be cognizant of this radiation risk, and the concepts of time, distance, and shielding are critically important to know in efforts to reduce radiation exposure.