Radiation-proof resin composition and radiation-proof cable

A radiation-proof resin composition, comprising:

• a polymer comprising chlorine;
• a radiation resistance providing agent for providing the polymer with a radiation resistance, the radiation resistance providing agent comprising an antioxidant and a processing aid;
• an amorphous inorganic material for capturing an ionic component generated in the polymer by radiation application, the amorphous inorganic material comprising a baked clay not more than 2.0 μm in an average grain size;
• and
• a reinforcing material for reinforcing a mechanical strength of the polymer, the reinforcing material comprising a carbon black not more than 200 nm in an average grain size, an amount of the reinforcing material being not more than that of the amorphous inorganic material,
• wherein the antioxidant is added to 100 parts by weight of the polymer at an amount not less than 2 parts by weight,
• wherein the processing aid is added to 100 parts by weight of the polymer at an amount not less than 5 parts and not more than 40 parts by weight,
• wherein the amorphous inorganic material and the reinforcing material are added to 100 parts by weight of the polymer at a total amount not less than 40 parts and not more than 120 parts by weight,
• wherein the reinforcing material is added to the polymer at a rate of not less than a fifth and not more than one relative to a unit amount of the amorphous inorganic material.