Nuclear plant refers to the power plants that using the energy released by nuclear fission or fusion reaction to produce electricity, the nuclear reactors (the device to maintain the controlled self-sustaining chained nuclear fission reaction in order to achieve the means use of nuclear energy) is the most critical equipment for nuclear plant. When the nuclear plants produce clean and sustainable use of nuclear energy, it also brings a series of radiation problems, which would be harmful to the environment, as well as the human health, especially for some strong radiation sources. So for the nuclear plant, shielding the radiation sources and producing nuclear energy must be valued and taken into account simultaneously.

 

The protective measures of shielding harmful radiation that taken by nuclear plant can be summarized into two: namely external irradiation protection and internal irradiation protection. The external radiation protection measures are followings:

 

1, Shielding protection: The rays will be weakened when penetrating through the substances, utilizing this property to effectively choose the substances as the shielding and disposed it between the radiation source and the humans so as to achieve the purpose of radiation shielding. Tungsten alloy shielding material has an absolute radiation absorption capacity because of its high density property. So tungsten alloy shielding materials can be made into various types of shields for reducing the radiation, so as to ensure the safety of the staff, who’s working in the nuclear plants.

 

2, The distance protection: As the name suggests, the distance protection is to expand the distance of radiation source and humans so as to achieve the purpose of protection, but this method is more difficult to ensure that the human body can avoid the radiation at a certain distance.

 

3, Time Protection: Time protective measures is to reduce the residence time of humans in the radiation danger areas.

 

4, Radiation source protection: It means to wrap a certain amount of shielding material into the radiation sources, in order to weaken the strong nuclear radiation, and thus play a role in radiation shielding. The shielding material also can be made with tungsten alloy materials, it has the same advantages with shielding protection measure.