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Tungsten alloy shielding for radioisotope thermoelectric generator is used to shield radiation released from radioisotope thermoelectric generator. A radioisotope thermoelectric generator is an electrical generator that uses an array of thermocouples to translate the heat from the decay of an appropriate radioactive material into electric energy by the Seebeck effect.

Radioisotope thermoelectric generators have been used as the most desirable power source in space probes, satellites, and unmanned remote facilities. Such as a sequence of lighthouses built by the Soviet Union inside the polar regions. So radioisotope thermoelectric generator can play its indispensable roles even in the unmaintained situations need a few hundred watts of power for durations too long for batteries, fuel cells, or generators to provide economically,or even in places where solar cells have no effect. 

The plutonium-238 used in the radioisotope thermoelectric generators is a very powerful alpha emitter,it has a half-life of 88 years, other than the half-life of 24,110 years of plutonium-239 used in nuclear weapons and reactors. The shorter half-life of plutonium-238 makes it about 275 times more radioactive than plutonium-239. To minimize the risk of the radioactive material doing harm on people, tungsten alloy shielding for radioisotope thermoelectric generator is necessary.  

Study confirmed that the radiation shielding ability of a metallic material is closely related to its density, the higher the density the better the shielding performance. So the tungsten alloy shielding for radioisotope thermoelectric generator has great radiation shielding properties due to the high density of tungsten alloy. What's more, tungsten alloy will not cause harm to people or the environment.