Dismantling and decontamination system and method of bioprotective concrete of PWR type nuclear power plant

A dismantling and decontamination system for dismantling and decontaminating bioprotective concrete of a nuclear power plant, comprising:

• a dismantling device configured to dismantle an in-core instrument to form a penetrated part of the bioprotective concrete, wherein the in-core instrument is installed within the bioprotective concrete at a lower part of the bioprotective concrete, and wherein the penetrated part is formed in the lower part of the bioprotective concrete;
• a decontamination device configured to be inserted inside of an interior space of the bioprotective concrete for decontaminating radioactive waste of an inner wall of the bioprotective concrete forming the interior space, wherein the decontamination device, in its entirety, is inserted inside of the interior space of the bioprotective concrete;
• a waste receiving device configured to move into the interior space of the bioprotective concrete through the penetrated part of the bioprotective concrete;
• and
• a blocking device configured to contact an upper surface of the bioprotective concrete and block an upper opening of the interior space of the bioprotective concrete to block an outflow of radioactive dust.