Radioactive fine particle manufacturing system and method

A radioactive fine particle manufacturing method by employing a radioactive gas generating apparatus for generating a natural radioactive noble gas, a fine particle generating apparatus for generating a non-radioactive fine particle, and a mixing chamber for mixing the natural radioactive noble gas generated by the radioactive gas generating apparatus and the non-radioactive fine particle generated by the fine particle generating apparatus, the method comprising the steps of:

• a generating a natural radioactive noble gas step of, in said radioactive gas generating apparatus, feeding externally acquired air to the radiation source unit including a natural radiation source therein, generating a natural radioactive noble gas from the air and the natural radiation source, and feeding the same to the mixing chamber;
• a generating a non-radioactive fine particle step of, in said fine particle generating apparatus, generating a non-radioactive fine particle by a fine particle generator for generating a fine particle, discriminating a non-radioactive fine particle having a uniform and predetermined particle size from the non-radioactive fine particle by using a particle discriminator for discriminating a fine particle having the uniform and predetermined particle size, and feeding the same to said mixing chamber;
• a generating a radioactive fine particle step of, in said mixing chamber, attaching a progeny nuclide converted by radioactive decay from the natural radioactive noble gas fed from said radioactive gas generating apparatus in said step of generating a natural radioactive noble gas to the non-radioactive fine particle having the uniform and predetermined particle size fed from said fine particle generating apparatus in said step of generating a non-radioactive fine particle to generate a radioactive fine particle having the uniform and predetermined particle size;
• and
• a step of collecting a radioactive fine particle by outputting a radioactive fine particle having the uniform and predetermined particle size and generated in said step of generating a radioactive fine particle, from said mixing chamber in a one-way direction to an enclosed exposure chamber connected to said mixing chamber.