방사성오염물질 처분에 대한 고찰

Consideration of Radioactive Contamination Materials Disposal

Purpose: Nuclear medicine general operation room is radioactive control room which is used for the handling of radioisotope(R.I). Radioactive contamination materials must be under control and separated from general trash. With this experiments, we want to actively suggest the guideline of controling and operating radioactive contamination materials by measuring contamination degree and analyzing the causes which is not realized so far. Materials and Methods: Materials are selected from Oct. 2009 to March. 2010. salines which are used for labelling radiophamaceuticals and generator cap, saline needle cap, ⁹⁹ᵐTc-needle cap saline vial which is generated from ⁹⁹ᵐo/⁹⁹ᵐTc generator. After measuring each surface contamination degree by survey meter, mean value and standard deviation one were solved out. Results: In result, After measuring surface contamination degree, radioactivity of saline for labelling radiophamaceuticals showed 14429±26378 cpm (p<0.05) and in measured generators, foreign imported things showed that generator cap : 9±21 cpm, saline vial : 17±28 cpm. saline needle cap : 35±66 cpm, ⁹⁹ᵐTc-needle cap : 9±21 cpm, saline vial 13±28 cpm. domestic things showed that generator cap : 22852±52545 cpm, saline needle cap : 87367±109711 cpm, ⁹⁹ᵐTc-needle cap : 9008±10459 cpm, saline vial : 186416±158196 cpm (p<0.05). Conclusion: The saline which is used for labelling, exceeded 1/10 of maximum permissible range. this is generated from radiophamaceuticals dilution procedure. and In generators, radioactive value of foreign import things showed closely background value. but which of domestic thing showed that exceeded more than 1000 values 1/10 of maximum permissible range. the causes of that is domestic generator is contaminated in manufacturing procedure. So, to dispose radioactive contamination materials which is could betaken out of, the control and operation must be radical under controlled by radioactive measuring, recording and equipping of its own. if this is kept well, we can prevent surely that radioactive waste could be disposed like as general trash.